ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Artikel  (40.041)
  • Elsevier  (32.416)
  • Institute of Physics  (7.026)
  • Emerald  (599)
  • MDPI Publishing
  • SpringerOpen
  • 2000-2004  (40.041)
  • Mathematik  (38.784)
  • Sociologie  (1.257)
Sammlung
  • Artikel  (40.041)
Erscheinungszeitraum
Jahr
Zeitschrift
  • 1
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 87-101 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: Under the Americans with Disabilities Act (ADA), companies must provide customers with disabilities access to their "physical" stores. With the advent of the pure Web store, some wonder if the ADA will extend into "cyberspace". So, are companies ready? This study assesses Web sites to determine their readiness. Results reveal that only 9 percent of the sites have accessible home pages.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 31-52 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: Enterprise resource planning (ERP) systems are widely used by large corporations around the world. Recently, universities have turned to ERP as a means of replacing existing management and administration computer systems. This article provides analysis of the rollout of an ERP system in one particular institution in the UK, the particular focus being on how the development, implementation and use of both generic and university specific functionality is mediated and shaped by a fundamental and long standing tension within universities: this is the extent to which higher education institutions are organisations much like any other and the extent to which they are "unique". The aim of this article is not to attempt to settle this issue of similarity/difference in one way or another. Rather, it seeks to illustrate the value of taking discussions of similarity relationships surrounding the university and other organisations as the topic of analysis. One way of working with these kinds of issues without resolving them is to consider their "distribution" and where ERP shifts the responsibility for their final resolution. This is a novel and insightful way of understanding how ERP systems are refashioning the identity of universities. The article suggests, moreover, that ERP software is "accompanied" by such tensions in which ever site it is implemented. The research presented here is based on a participant observation study carried over the period of three years.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 116-123 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: In this editorial introduction Allen Lee's definition of the information systems (IS) field is taken as the starting point: "Research in the information systems field examines more than just the technological system, or just the social system, or even the two systems side by side; in addition, it investigates the phenomena that emerge when the two interact" (Lee, A. "Editorial", MISQ, Vol. 25, No. 1, 2001, p. iii). By emphasizing the last part of this, it is argued that actor-network theory (ANT) can provide IS research with unique and very powerful tools to help us overcome the current poor understanding of the information technology (IT) artifact (Orlikowski, W. and Iacono, S., "Research commentary: desperately seeking the 'IT' in IT research - a call for theorizing the IT artifact", Information Systems Research, Vol. 10 No. 2, 2001, pp. 121-34). These tools include a broad range of concepts describing the interwoven relationships between the social.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 4
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 210-238 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: This study investigates the potential of actor-network theory (ANT) for theory development on information technology project escalation, a pervasive problem in contemporary organizations. In so doing, the study aims to contribute to the current dialogue on the potential of ANT in the information systems field. While escalation theory has been used to study "runaway" IT projects, two distinct limitations suggest a potential of using ANT: First, there is a need for research that builds process theory on escalation of IT projects. Second, the role of technology as an important factor (or actor) in the shaping of escalation has not been examined. This paper examines a well-known case study of an IT project disaster, the computerized baggage handling system at Denver International Airport, using both escalation theory and ANT. A theory-comparative analysis then shows how each analysis contributes differently to our knowledge about dysfunctional IT projects and how the differences between the analyses mirror characteristics of the two theories. ANT is found to offer a fruitful theoretical addition to escalation research and several conceptual extensions of ANT in the context of IT project escalation are proposed: embedded actor-networks, host actor-networks, swift translation and Trojan actor-networks.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 5
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 8-30 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: Argues that the organizational involvement of large scale information technology packages, such as those known as enterprise resource planning (ERP), has important implications that go far beyond the acknowledged effects of keeping the organizational operations accountable and integrated across functions and production sites. Claims that ERP packages are predicated on an understanding of human agency as a procedural affair and of organizations as an extended series of functional or cross-functional transactions. Accordingly, the massive introduction of ERP packages to organizations is bound to have serious implications that precisely recount the procedural forms by which such packages instrument organizational operations and fashion organizational roles. The conception of human agency and organizational operations in procedural terms may seem reasonable yet it recounts a very specific and, in a sense, limited understanding of humans and organizations. The distinctive status of framing human agency and organizations in procedural terms becomes evident in its juxtaposition with other forms of human action like improvisation, exploration or playing. These latter forms of human involvement stand out against the serial fragmentation underlying procedural action. They imply acting on the world on loose premises that trade off a variety of forms of knowledge and courses of action in attempts to explore and discover alternative ways of coping with reality.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 6
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 53-70 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: Although we now know much about children's use of information and communications technologies, researchers have yet to consider adequately the roles that children play in shaping adults' computer use. Via household survey data from a randomised sample of 1,001 adults and in-depth interview data from 100 of these initial respondents, this paper explores the meditating roles of children in: the purchasing/acquisition of computers by adults; adults' access to computers; the level and nature of adults' use (and non-use) of computers; how adults learn to use computers; and how adults are supported when using computers. The paper concludes that while children play a variety of roles in adults' (non)adoption and (non)use of computers this influence is often tempered by a range of other factors and, indeed, should not be overstated. For example, while children appear to be a significant "official" factor in parents' and grandparents' adoption of computers they were rarely the sole reason for adults investing time and money in ICT - with a range of other self-orientated reasons usually in attendance. In terms of adults' access to and use of ICT, the demands of children to use computers were a mitigating but not always dominant factor to be considered by parents. Similarly, children appear to play a peripheral role in supporting adults' use of ICT. The paper concludes by considering how the role of children in adults' use of ICT would appear to be often more symbolic than practical;, e.g. as an official justification for buying/adopting a computer rather than as a strong and sustained guiding force.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 7
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 150-170 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: This article juxtaposes the history of the book to the current discussions about lay health information on the Internet in order to thoroughly open up the notion of "reliability" that underlies these discussions. It uses the parallels between the two media to improve understanding of what actors are involved and what issues are at stake, as well as how this is consequential for the reliability that is constructed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 8
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 186-209 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: Much of IT research focuses on issues of adoption and adaptation of established technology artifacts by users and organizations and has neglected issues of how new technologies come into existence and evolve. To fill this gap, this paper depicts a complex picture of technology evolution to illustrate the development of Web browser technology. Building on actor-network theory as a basis for studying complex technology evolution processes, it explores the emergence of the browser using content analysis techniques on archival data from 1993-1998. Identifies three processes of inscribing, translating, and framing that clarify how actors acted and reacted to each other and to the emergent technological definition of the browser. This spiral development pattern incorporates complex interplay between base beliefs about what a browser is, artifacts that are the instantiation of those beliefs, evaluation routines that compare the evolving artifact to collective expectations, and strategic moves that attempt to skew the development process to someone's advantage. This approach clarifies the complex interdependence of disparate elements that over time produced the Web browser as it is known today.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 9
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 303-326 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: The central purpose of this paper is to demonstrate that managers of several IT companies, during the dot-com bubble, used the myths that were readily available in the wider American culture of the time to motivate and manipulate their employees. These managers motivated their employees to put in long hours at the worksite, to be continually on-call, to intensify their work pace, and to self police their co-programming teams. The methods used were qualitative social research including interviews, observations, self-reported organizational charts and time diaries. This is a single case study conducted during a specific period of time. The implications discussed in this paper may provide insight to the managers of IT personnel who seek to motivate their employees to greater efficiency. This paper adds to a discussion on the role of myth in managing IT personnel.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 10
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 407-422 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: The use of information technology in rural and underserved settings is receiving increasing attention because of the immense potential it brings for improving the quality of life and reducing the digital divide. However, high costs coupled with infrastructure and context-related inhibitors tend to dilute the advantages that are often taken as a set of givens. In this paper we present a case study of a pioneering experience of information system use in a set of villages in southern India. The research proposition for this study is that social processes can form a viable basis for providing sustainability to information communications technology (ICT) initiatives in rural regions. Theoretical support for this study comes from Habermas' theory of communicative action. Given that such information systems are emancipatory in nature, and given that such information systems face many obstacles, the value added by these systems needs to be assessed in terms of their contribution to social capital in addition to economic value added. Our analysis reveals that social processes can be leveraged to accord viability to ICT setups in rural settings. Many social changes, that may have faced resistance or were unexpected, themselves became the reason for keeping the ICT setup. This is so because these changes form the basis of empowerment and a participatory framework that would have been absent earlier. We provide implications for researchers as well as practitioners.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 11
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 71-86 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: Young people entering their first year of university studies were asked to give their impressions of 12 high knowledge and information sector occupations. Their perceptions yield a complex set of expectations that are consistent, in large measure, with experts' predictions of the information sector's occupational winners and losers. The majority of students aspire to be self-employed or to work in the private, rather than the public sector. Of the occupations included in the study, the students perceived the occupation "librarian" most negatively in terms of skill, status, compensation and future opportunity, unlike, for example, the similar occupation, "Internet researcher". The results are discussed in term of the complex interactions of gender, computing, and skill on the attractiveness of difference types of work.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 12
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 124-149 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: This article explores the ways in which actor-network theory (ANT) invites an alternative account of democratic process, namely in terms of issue-formation, which is particularly well suited to the study of democratic practices facilitated by information and communication technologies (ICT). Engaging with arguments that have been made in political theory in favor of the re-invigoration of institutional and extra-institutional forms of democratic debate, this article argues that a re-valuation of issue-politics is more than timely. In this respect, actor-network theory is a particularly fruitful approach, since it provides the conceptual and methodological equipment to account for democracy in terms of processes of issue formation. Such an account of democracy, it is argued, is particularly appropriate to the study of ICT-based democratic processes, since in the context of ICT distributed networks that configure around particular issues can be seen to emerge as the carriers of democratic process. Moreover, ANT provides the conceptual and methodological tools for the development of a research practice of tracing public controversies as they are enacted in such networks on the Web. In tracing a particular controversy on the Web, around the Development Gateway, a portal for development information set up by the World Bank, one begins to articulate an alternative understanding of the significance of ICT for institutional as well as extra-institutional forms of democracy. A number of requirements on effective democratic action, as facilitated by ICT, are derived from the case study, which move beyond the requirement of social networking, i.e. the building of partnerships, and informational networking, i.e. the exchange of knowledge and opinion. Issue-networking here comes to the fore as indispensable to democratic politics.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 13
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 252-267 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: This paper presents a framework for understanding the technological change and its impacts on environments where multiple versions of a technology exist simultaneously. Both orienting and limiting role of physical (skeumorph) and conceptual metaphors on the products, processes, and user experience in changing from a familiar functional implementation to the one employing new media is illustrated using examples showing the transition from wet photography to digital imagery and from surface mail to e-mail. People use physical (skeumorph) and conceptual metaphors to orient themselves with new technology by understanding new functions in terms of earlier technological versions. Since new technology is adopted at varying rates and varying times, multiple versions exist at any given time. Sometimes expectations appropriate for earlier technological iterations obscure the challenges and possibilities presented by the new media implementation. This paper examines how new technologies challenge and are challenged by the contexts into which they are introduced. By understanding the function that physical (skeumorph) and conceptual metaphors play in facilitating technological change, we can become more conscious of the discontinuities between the new technological iteration and earlier implementations to gain deeper awareness about how "the new" functions differently and to help us engage new technology closer to its own terms and open up new possibilities for its use.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 14
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 327-338 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: The impact of information technology (IT) on society is tremendous. Globalization of trade, the emergence of information economies, and the growth of the Internet and other global communications networks have recast the role of information systems in managing global corporations. The purpose of this study was to investigate the extent to which personal characteristics such as gender, age, education, income, and experience predict IT managers' job satisfaction in Nigeria. A sample of 360 IT managers selected from business organizations in Nigeria were used for this research. The results of this study suggest that IT managers were satisfied with their job, co-workers, and supervision, whereas they were dissatisfied with their pay and the promotion system. The results of regression analyses also showed that personal characteristics were significant predictors of job satisfaction.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 15
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 423-441 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: The paper uses the dramaturgical perspective for conceptualising trust development within temporary virtual teams. The underlying assumption is that temporary teams do not have the luxury of time that, according to the traditional trust theories, enables familiarity among team members and promotes trust development. Yet, in these teams, trust needs to develop quickly and it is important that it lasts throughout the short duration of the project lifecycle. Using the metaphor of a theatre, a dramaturgical perspective on trust relationships is adopted and is used to present actors, co-actors and audience as all playing a key role in scripting, staging and performing virtual plays. The dramaturgical perspective provides an illustrative approach for uncovering the interactions between key players. As it is argued, these interactions elicit the process of trust development within the temporary setting of virtual teams, constituting a type of trust relationship that is mutually negotiated and jointly constructed. This type of trust is called "situated" and emerges from the scripted, pre-scripted, co-scripted, re-scripted and unscripted computer-mediated interactions of virtual players. The implications for theory and practice are discussed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 16
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 293-303 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: This paper argues that UK business and management schools continue to operate a gender blind approach (or at best gender neutral) to management education, research and the development of management theory. This echoes a pattern repeated in the practice of management, which closes down and inhibits opportunities for management to be "done differently" and for organizations to be different. Our aim in this paper is to critically scrutinise and enable a consciousness raising in ourselves and our audience by highlighting what we understand as gender blindness within management, management research and education. However, the issue of whether this gender blindness results from "not seeing", "being unaware", "suppressing gender" or "gender defensiveness" remains problematic. We conclude with a call for an "unlearning" and a "rethinking" of gender blind management education and provide some examples of how this might be achieved.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 17
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 109-122 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: The paper examines how male and female executives' leadership orientations are reflected in crisis awareness. Drawing on management-related gender and crisis theories, it is argued that women's proclivity to employ participative decision making is mirrored advantageously in coping with crisis-related scenarios. Predicated on a sample of 112 Israeli executives it is shown that perceptions of crisis preparedness/proneness are gender-based and that women are more likely to employ a holistic approach that facilitates crisis preparedness.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 18
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 164-173 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Recent research on women business owners de-emphasizes home-based business ownership, despite the fact that home-based ownership is on the rise. This study uses data from the Upstate New York Small Business Project to compare women engaged in home-based businesses to their counterparts, who locate their businesses outside the home. The results indicate that the women engaged in home-based business ownership experience less work to family conflict than their counterparts. Yet their businesses enjoy less economic success than those run by their non-home-based counterparts. This suggests that home-based ownership may be a good option only for women who do not have strong financial needs.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 19
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 304-316 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: The purpose of this study was to examine the effect of diversity programs on female student representation within sport management preparation programs. A questionnaire was sent to 172 undergraduate and graduate sport management preparation programs at the North American Society for Sport Management member institutions and 72 completed surveys were returned. These data were used to test a confirmatory path model at the undergraduate and graduate levels. Results show that diversity programs continue to be developed, and that diversity program leads to increase female student representation within undergraduate and graduate sport management preparation programs. Based on the findings of this study, student diversity programs are assisting to eradicate barriers for women in the sport management profession.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 20
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 356-363 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Organisational stress originates in organisational demands that are experienced by the individual. Stress is built up in the concept of role which is conceived as the position a person occupies in a system. This paper investigates the intensity of organisational role stress among women informational technology professionals in the Indian private sector. Organisational role stress scale is used on a sample of 264 to explore the level of role stress. Resource inadequacy has emerged as the most potent role stressor, followed by role overload and personal inadequacy. The research finds differences in the level of stress between married and unmarried employees on several role stressors. However, level of education does not emerge as a significant differentiator of stressors.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 21
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 404-412 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: This paper reports on the difference between men and women's motivations for going into business and why they choose to operate their business from home. Reports the views of the operators regarding community attitudes towards home-based businesses. Data was collected from a self-administered survey distributed by post, from home-based business operators in two local government areas in Western Australia. Two focus groups verified the findings of the survey and investigated the home-based business operator's perceptions of the communities attitude towards them. It was evident that some sections of the community felt that home-based businesses are extended hobbies and not to be taken seriously. The paper argues that this view ignores the significant financial and social contributions that home-based businesses make to the economy and society in general and is not a view that is held by home-based business operators themselves.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 22
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 171-185 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: Theories of sociotechnical change seek to understand technology as both material and social artifacts. Actor-network theory (ANT) offers an approach to sociotechnical change that has been criticized for emphasizing a micro-level analysis of political strategies at the expense of larger social and cultural processes. This paper presents an approach to sociotechnical change that links the enrollment process of ANT with broader social practices, through the concept of inclusion in multiple technological frames. Inclusion in different technological frames is used to explain the sources of enrollment strategies in the early personal digital assistant (PDA) industry. Two case studies of PDA evolution (Psion, led by David Potter, and Palm, led by Jeff Hawkins) are used to illustrate the link between enrollment strategies and inclusion.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 23
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 268-285 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: This paper seeks to analyze the role of network effects in relation to the adoption and use of systems for knowledge sharing in organizations and draws on recent developments within network economics to outline a theoretical perspective on the implementation of knowledge repositories in organizations. Findings from a longitudinal field study are presented to explore the concept of network effects in more detail. Commonly associated with economics, the concept of network effects can also be used in an organizational context to study adoption dynamics and use patterns when new information and communication technologies are introduced. The analysis of the field study data shows that knowledge repositories exhibit strong network effects, which can complicate the implementation process in multiple ways. The research is based on a single, in-depth case study. Future research should study the role of network effects in relation to other technologies and organizational contexts. It underscores the need to be aware of - and try to manage - network effects when implementing knowledge repositories and other "networked" technologies. By and large, IS researchers have overlooked the role of network effects in relation to information and communication technologies in organizations. This paper begins to address this gap by focusing on the role of network effects in the adoption and use of knowledge repositories. It is suggested that the concept of network effects provides a useful theoretical lens in a number of other cases.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 24
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 359-379 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: Seeks to determine the impact managerial controls have on the effectiveness of virtual teams. Using an experimental design compares self-directed virtual teams to counterparts where behavior controls are used as a method of managerial control. The data were collected using 51 student teams of three or four members each from three different countries. The results indicate that the most satisfied team members were in virtual teams with effective coordination and communication. Members of self-directed virtual teams report higher individual satisfaction with the team and project, while different control structures had no significant impact on virtual team performance. Future research should investigate how these findings generalize to organizational workers, rather than just looking at students. This paper is just a first step investigating one type of managerial control: behavior controls. The small amount of research that has been published on virtual teams has primarily concentrated on self-directed teams. This paper compares results of team effectiveness by looking at both self-directed virtual teams and virtual teams with behavioral controls enforced.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 25
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 442-461 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: Many authors have identified fears about a lack of personal privacy online as a major disincentive to the take-up of e-commerce by private consumers. The publication of a privacy policy is encouraged by information and communications technology industry groups such as the Online Privacy Alliance, and by online certification bodies such as TRUSTe. Privacy policies are taken to reassure the wary, and thereby to overcome the disincentive to trade. This paper offers an account of an ongoing research project into the practical measures taken by organisations to publish their online privacy policies. Late in 2000, a total of 113 disparate web sites were identified that included some kind of explicit privacy policy and the visibility and content of the policy was analysed. The primary research into privacy policies is set in context by relating it to a discussion of the nature and role of trustworthiness in online relationships. This highlights a number of issues that need further attention on the part of some of the organisations in the survey.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 26
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 18-28 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Scholarly interest in women's business ownership has increased, but few studies offer theoretically-based explanations for the racial differences observed among women entrepreneurs. This paper seeks to remedy this oversight by applying several theories of entrepreneurship to a comparative study of white and minority women. An analysis of survey data from upstate New York shows that these theories can explain why racial differences in women's business ownership exist. In particular, the theories shed light on these differences by calling attention to a gap between the high aspirations of minority women for business ownership and the paucity of formal entrepreneurial resources that are available to these women (e.g. financial capital and human capital).
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 27
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 52-64 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Studies on participation in organizational decision making in the context of developing countries are limited, especially from a gender perspective. Based on a survey of government and private sector employees in Dhaka, Bangladesh, this study explores the extent to which women have been integrated in the workforce and how both genders perceive their participation in decision making. Organizational climate is perceived as healthy, while communication between the genders does not reflect major barriers or animosities. Yet, in the largely traditional male-dominated organizational setting, it is interesting to note that while overt resistance to women has decreased, subtle hostilities continue to resonate. Such hostilities adversely affect perceived participation. A strain of conservatism also continues to exert some negative influence on perceived participation but mostly on women.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 28
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 286-292 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Across both the private and public sectors one strategy that has been used to support women in leadership roles and to increase women's participation in leadership positions has been to establish formal female specific networks. This paper examines the efficacy of such a strategy through a case study of one such group - the Australian Local Government Women's Association. Data for the paper are drawn from interviews with the 19 female mayors in the Australian state of Queensland. Participants were divided in their views about the organization. One group expressed support for women's networking, a second group was critical of women organizing in such a way and a third group expressed ambivalence about the value of women's networks. This paper draws on these views to assess the transformative potential of women's networks. It concludes that women-only networks have a valuable role to play in securing greater equity for women in management.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 29
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 5-17 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Research investigating female self-employment has often highlighted gender-based differences in the performance of women-owned firms. Some studies have linked the under-performance of women-owned firms to the lower levels of capitalisation used at business inception, associating this with disadvantages accrued in waged work and occupational segregation more generally. Drawing on this association, there has been a tendency to treat self-employed women as an undifferentiated group, failing to recognise heterogeneity therein. Considers the impact of the possession of professional qualifications on self-employment and to what degree they might have the potential to mobilise substantial business capital. The discussion explores the influence of gender in the work and career experiences of women and whether the advantages accrued from professional status might challenge gender disadvantage within self-employment. Results are presented from an exploratory study of male-owned and female-owned accountants in independent practice, which suggest that gender disadvantage persists, even within the context of professional practice.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 30
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 98-108 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: This paper outlines the methods and outcomes of a study into equity management strategies in Australian private sector organisations reporting to the Equal Opportunity for Women in the Workplace Agency (EOWA). Reports from 1,976 organisations indicate 11 key factors characterising equity management in Australia. The study highlights differences within previously identified social structural policies, temperamental and opportunity policies and identifies a further policy type, categorised as "support policies". Differences have also been identified in relation to distribution structures, suggesting that gender is not the sole consideration in determining equity management strategies. The justice principle of distribution also figures strongly in equity management implementation.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 31
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 74-87 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: A study was undertaken to determine if there were quality differences between ventures that were forwarded on to a mass merchandiser for buyer review and those that were not. The sample ventures were manufacturers participating in an independent evaluation program for a major US midwest mass merchandiser. The quality issues were based on common management practices and on the marketability of the product being offered to the firm. Ventures that were forwarded for subsequent buyer review were found to be superior in both areas of concern. A separate analysis was run to determine if any gender-based differences were notable in the evaluation process. With few exceptions, male- and female-owned ventures were of comparable quality when forwarding status was controlled. However, using regression analysis, product quality was found to have the greatest impact on whether or not a female-owned venture was forwarded, while the quality of the entire venture (product and management practices) was of greater significance for male-owned ventures.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 32
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 143-153 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Despite the increased gender parity in the workforce today, few women attain top management positions in America's largest corporations. Instead, an increasing number of women are achieving CEO status as entrepreneurs. In-depth interviews with women who have lived in both worlds - that of the stable company and one launched and run on their own - give some insight as to the nature of the problems and perceptions faced by women as managers and entrepreneurs. Issues such as gender-role bias and work/life balance are concerns for women with and without children. Gathering information from women who decided to form their own organizations after they had worked in a large organization, this paper examines some of the decision-making factors and socio-personal constraints that affect such entrepreneurship.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 33
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 186-195 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Many organisations are encouraging their staff to integrate work and non-work, but a qualitative study of young professionals found that many crave greater segregation rather than more integration. Most wished to build boundaries to separate the two and simplify a complex world. Where working practices render traditional boundaries of time and space ineffective, this population seems to create new idiosyncratic boundaries to segregate work from non-work. These idiosyncratic boundaries depended on age, culture and life-stage though for most of this population there was no appreciable gender difference in attitudes to segregating work and non-work. Gender differences only became noticeable for parents. A matrix defining the dimensions to these boundaries is proposed that may advance understanding of how individuals separate their work and personal lives. In turn, this may facilitate the development of policies and practices to integrate work and non-work that meet individual as well as organisational needs.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 34
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 219-226 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: A total of 220 managers from a banking organisation were surveyed. No differences for age, educational background, employment history or managerial level were found, but females were significantly more likely than males to be the first person of their sex to hold their particular managerial position. Women are significantly less likely to be married or to have children. They have significantly fewer children, and their children tend to be significantly younger than those of their male colleagues. Women still have to make choices that men do not in order to further their careers. Average scores for occupational pressures were not high for either sex. Men report higher levels of pressure stemming from the work environment and managerial relationships with subordinates and superiors. Women report significantly higher pressures stemming from perceived gender inequities and work-life balance concerns. Discussion focuses on why women bank managers do not perceive the workplace as free of gender-related and work-life balance pressures.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 35
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 260-273 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Women on average still have more responsibility for home, family life, and child care than men. Extensive research has focused on the needs of, and support required by, these working women, most often exploring related organizational programs and benefits. This paper attempts to remedy this deficiency by examining the roles women perceive their spouses or partners play in these families in sharing home and family responsibilities and supporting the careers of these women. It explores the differences in the roles that women in early, middle, and late life perceive their spouses or partners play. Differences exist in women's perceptions of how spouses or partners manage family finances, support the women's careers, contribute to household management, and provide interpersonal support. Specific roles and the resulting support are related to the life satisfaction, job satisfaction, and work-life balance of some but not all cohorts of the women surveyed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 36
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 325-332 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: This paper describes the findings of a unique nationwide research on female entrepreneurial activity in Cyprus, which was carried out for the Women's Cooperative Bank of Cyprus Ltd with funding from the Ministry of Justice and Public Order. On the one hand, it is an attempt towards gaining greater understanding of who the women who develop enterprising activity are (in other words determine what their demographic characteristics are), what their company characteristics are, (e.g. sector of activity, size etc.) as well as what their needs and concerns (e.g. the impact of multiplicity of roles, upgrading of skills or knowledge etc.) are. On the other hand, it is equally important to see how strong women business owners' presence is in the local economy.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 37
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 364-372 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Reproduces studies carried out at the beginning of the 1970s that demonstrated women's anxiety about university or professional success. This anxiety was characterised by their fear of being socially isolated. A methodology in which women are asked direct questions shows that they have overcome that anxiety. But when a more subtle type of question is used, it is revealed that women continue to attribute the best academic, professional and social results to men instead of women.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 38
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 413-420 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Looks at the extent to which employers recognise and act on "business case" incentives for implementing working-time flexibility for those wishing to develop career paths. Focuses, in particular, on women's flexibility following maternity and their ability to access part-time management positions through accommodating a reduction in working hours, or the integration and promotion of women working part-time to managerial status. The research was generated through 62 qualitative interviews with mothers currently working in the hospitality industry and a further ten interviews with male and female managers of these women. Findings reveal that while managers are aware of the benefits of retaining highly qualified women managers, these informal practices are not universally accessible. There is little evidence that managers recognise a "business case" for the integration of part-time workers into higher occupational grades, despite the recent regulation of part-time work in the UK.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 39
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 29-39 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: There are significantly more New Zealand women in senior management positions in the public sector than in private businesses. This study draws on the experiences and perceptions of 30 women executives who have considerable managerial experience in either sector. Success factors for the individual women are outlined before the cultures of the public and private sectors are described. Through the eyes of respondents, the public and private sectors have distinguishable organizational cultures; both of which provide parallel but different sites for advancement. The private sector businesses have a focus on competition and the public sector has a strong ethos of service, in spite of restructuring. The findings are discussed in the context of a country that has strong women leadership in the political sphere.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 40
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 40-51 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Women are under-represented in the ranks of expatriate managers and research on expatriates, though formally gender-neutral, has been heavily weighted towards the study of male professionals, thereby reinforcing the image of expatriates as male, middle aged, married with children. What most research has in common is an individualistic, psychological approach to the study of expatriate experience. A focus on (change) processes on individual and organisational level draws our attention towards career theory. This paper presents a theoretical framework that conceptualises expatriate careers as a career transition that triggers individual and social structuration processes. It reviews the key findings of research on Western women managers in Hong Kong and gives insight into the experiences of expatriate women managers in a new socio-cultural, economic and organisational environment.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 41
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 154-163 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: During the past decade, the incidence of women starting businesses dramatically accelerated in the US. A national, representative sample of women (and men) business owners was interviewed by telephone to understand better this phenomenon. This analysis focuses on women business owners who left corporate careers to start their own businesses. Respondents' experiences with corporate "glass ceilings" and "glass walls", such as lack of flexibility and challenge, lack of role models and mentors, lack of access to line positions with concomitant intrapreneurial opportunities, and failure of organizations to credit and reward women's contributions, are examined. Differences among three age cohorts of women business owners, included in the analysis, portend increased difficulty for companies in retaining talented women professionals and managers, especially those with entrepreneurial interests. Recommendations to companies include identifying and eliminating barriers to women's advancement in the corporate culture and work environment, and development of more intrapreneurial opportunities.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 42
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 205-211 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Current and future public sector executive leadership role demands are explored from a competing values perspective, using roles previously identified with a private sector population. The roles identified were vision setter, motivator, analyser and task master. The results of a 4×2×4×2 MANOVA indicated that there were significant results for the main factors of leadership roles and time and also for the interaction of these two factors. There were no significant gender differences, with female and male Australian Public Service senior executives offering very similar assessments of current and future role demands. Both groups said that future role demands would be greater than is currently the case. Reasons for the differences in the current and future role demands are discussed, and the scope for future research is highlighted.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 43
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 196-204 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Equal employment opportunity policies were introduced in Australia in the 1980s in response to women's disadvantaged workforce position. Australia's unique form of affirmative action was underpinned by legislation, and aimed to promote gender equity in the workplace via employer action. Throughout the 1990s there has been a policy shift away from collectivism towards individualism, and away from externally driven social programmes at the workplace towards managerialist driven social programmes. The main process for implementing progressive and inclusive equity programmes at the workplace is through human resource management policies that link employment diversity to organisational objectives (for example, productivity and profitability). Programmes titled "Managing diversity" have been introduced into some organisations, and today there are a variety of approaches towards equity policies in Australian organisations. The article proposes that a distinctive Australian version of managing diversity will develop in some organisations based on the prior national legislative framework.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 44
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 212-218 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Mentoring is frequently cited as playing an important role in the career development of successful women managers. E-mentoring is relatively new and under-researched, particularly outside North America. The present research investigates the advantages of e-mentoring for women through a pilot programme set up with 28 mentor pairs. E-mentoring is compared with traditional mentoring, and the potential of e-mentoring for women's management development is evaluated. Challenges included encouraging participants to use all the resources of an e-mentoring system and to develop fluency in online communication. The quality of the mentoring relationship remained the most important factor in the success of e-mentoring. The paper identifies areas for further development in e-mentoring.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 45
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 244-251 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Research into "corporate masculinity" suggests that executive men position their difference, status and power through discourses which involve the strategies of "identification with some men and differentiation from others, including women". While these processes apparently place women in an antithetical relationship to power, women are increasingly achieving executive leadership. This paper examines the career representations of 30 senior women executives. Drawing on a social constructionist approach to gender and identity, examines women's positioning of self within the discourse and discusses how they deal with the apparent paradoxes or contradictions of female identity within a world dominated by corporate masculinity. Our findings suggest that women engage in processes of identification and differentiation comparable to those of men. Perhaps unexpectedly, these processes often involve an assertion and celebration of female difference that includes distinctions between "the wo-men and the boys". They also involve a more tentative process of differentiation from corporate masculinity through the construction of an emerging new culture, the culture of women in business.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 46
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: Aims to present the work done in the development of a simplified office suite for disabled and focus on the use of technology applied to the area of "designing for all". The paper presents an overview of the state-of-the-art in the design for all. It provides practical references to techniques used. The main scope of the paper is to explore the developed technology and give details for the adopted mechanisms. It provides information about designing and implementing software applications for disabled and present a case study for mentally disabled. The paper presents a system that can be used by a specific target group. For this reason, it should be used as reference point for this group, although several techniques can be used for other user categories. The paper is a very useful presentation of an actual system that has been designed and implemented to cover the needs of disabled, useful for interaction with designers and researchers in assistive technology, and it fulfils the need for demonstrative technology in the area of designing for all.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 47
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Information, technology & people 17 (2004), S. 380-406 
    ISSN: 0959-3845
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Informatik , Sociologie
    Notizen: Examines the relationship between how people are managed, and the effectiveness of business to business (B2B) e-commerce implementations. The human resource management practices used to test this relationship are training, employee involvement and participatory culture. A survey instrument was designed for the purpose of testing the research hypotheses based on the themes identified in the review of the literature. This survey was administered within a sample of the membership of EAN Australia. The results indicate that there is a clear link established between effective management of human resources and effective implementation of B2B e-commerce enabling technologies. In particular, there is evidence to suggest that the development of a participative culture coupled with the involvement of employees, will be more effective than solely investing in training programs. This study has been limited to organizations operating in the Australian fast moving consumer goods sector. The results therefore need to be read in this context, and it would be useful if these hypotheses could be tested in other countries and different industry sectors. The overall impression is that the organizations that will derive the greatest benefit from the use of these technologies will be not only those that invest in training for the use of the technology. More important sources of leverage are likely to derive from involving a broad range of employees directly in implementation, while actively encouraging a culture of participation across the organization. There is a clear link established between effective management of human resources and effective implementation of B2B e-commerce enabling technologies. In particular, there is evidence to suggest that the development of a participative culture coupled with the involvement of employees, will be more effective than solely investing in training programs.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 48
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 139-142 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Women in the UK frequently do not consider business ownership as an alternative to other forms of employment or as a means to gain economic benefits. The number of women currently entering in to businesses in the North of England is decreasing and is less than half of that in the South. This paper examines the preliminary findings from a longitudinal study exploring the socially created barriers to business start-up that inhibit the growth of women entrepreneurs and how they may be removed. The study employed an action research approach to investigate the experiences of UK women entering into micro and small business ownership, emphasising the social construction of many of the barriers faced by women in the pursuit of business ownership. In doing so it examined personal and motivational factors surrounding the start-up process, the economic and physical barriers encountered, as well as the perceived and actual support and advice available to women.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 49
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 174-177 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Traditionally, the concept of entrepreneurship included a for-profit bottom line. Recently, however, researchers have begun to explore an adaptation of this model called "social entrepreneurship"; that is, creating organizations for the greater good of a community, region, nation, or the world. These entrepreneurs use money that they made or inherited to establish organizations from a missionary and visionary posture. This is an arena where women have had significant impact, yet little has been written to celebrate their contributions. The purpose of this paper is to explore the concept of such philanthropy, to suggest where this social ethic might have had its origins, and to provide samples of women who have been entrepreneurial in their social commitment. Suggestions for future research on women's entrepreneurial philanthropy will also be made.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 50
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 252-259 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: This research considered potential antecedents and consequences of workaholism in a sample of 324 female Australian psychologists. Three workaholism types were compared based on measures developed by Spence and Robbins. Data were collected using self-report questionnaires completed anonymously. Antecedents included personal and work situation characteristics, a measure of personal beliefs and fears and a measure of organizational values supporting work-personal life imbalance. Consequences included measures of validating job behaviors, work outcomes, psychological health and extra-work satisfactions. The three workaholism types differed in personal beliefs and fears, work addicts (WAs) scoring higher than work enthusiasts (WEs). WAs indicated less job and career satisfaction than both WEs and enthusiastic addicts (EAs) and lower future career prospects than did EAs. WAs also reported lower emotional health than did WEs. The workaholism types were similar on extra work satisfactions. Each workaholism type also worked similar hours per week as well. These findings validate previous conclusions indicating similar findings for both men and women.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 51
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 317-324 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: This exploratory study examined the role of both gender and race/ethnicity, and their interaction, on cultural values likely to be related to attitudes toward equality and diversity and an attitude towards equality and diversity itself. Data were collected from 120 employees from a large financial institution in Canada. Non-North Americans and non-Caucasians held cultural values that were found to be associated with less support for equality. These findings suggest that additional efforts must be made to bring non-Caucasians on side as companies attempt to create a level playing field for all employees.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 52
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 391-403 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: The paper discusses some gender debates in linguistic behaviour and suggests how scenario-based research techniques may contribute. It then presents a survey-based study of 157 Australian female, organisationally senior, managers. For each of three workplace communication dilemmas, participants evaluated a series of strategic responses, indicating both how effective and how probable they thought the responses were. Despite the participants' seniority and confidence as communicators, their evaluation of the strategies often varied with whether they believed the communication strategist in the scenario was male or female. This suggests that even confident, organisationally senior women still maintain some traditional gender-based ideas about good communication. Despite this, the participants' own preferred communication strategies did not vary with their seniority or their confidence in expressing opinions. The study's theoretical and practical implications and some limitations are discussed, together with topics for further research.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 53
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 431-436 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: This research investigates the barriers that are preventing female undergraduates who major in quantity surveying from entering the construction industry on graduation. Possible barriers are identified and are categorized into external factors and internal factors. Self-administered questionnaires were distributed to randomly selected female QS undergraduates. Among the external factors (work-related factors), female undergraduates are discouraged by the nature of working conditions of and sexist attitudes that exist in the construction industry. Among the internal factors (personal attributes), female undergraduates indicated that they were not confident about their own abilities to work with male contractors and sub-contractors. They also felt that they would not be assertive; unable to manage male construction operatives and subordinates; and did not possess adequate technical skills. Recommendations are given on how these barriers may be lowered or eliminated, so as to encourage more women to enter the construction industry on graduation.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 54
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 233-243 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Understanding cultural differences is critical to international business success. Hofstede's (1980) model of national culture is widely used to identify such differences. The cultural dimensions identified in Hofstede's model, however, are not gender-specific, with one exception, masculinity/femininity. Hofstede's data were gathered in the late 1960s and early 1970s. Considerable change has taken place since that time, particularly in the areas of education, legislation, and workforce composition. It is proposed that these changes, among others, may have resulted in gender differences in dimensions of national culture. This study provides an exploratory examination of gender differences in cultural characteristics in two industrialised countries with distinctly different cultures, Japan and the USA. Results indicate that gender differences exist in the power distance dimension for Japan and in the individualism/collectivism dimension for Japan and the USA. Theoretical and practical implications of these findings are discussed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 55
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 345-355 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: Job attitudes, such as work commitment and job satisfaction, have attracted academic and practitioner attention for a number of reasons. Previous research indicates that such attitudes have important organizational consequences, such as turnover, effort expenditure, and productivity. Earlier findings indicate that men and women have different attitudes towards their jobs. In this study, using a sample of 228 employees, the effects of gender on job attitudes was investigated. The results suggest support for the job model or structuralist perspective; that is, women and men have similar job attitudes once we control for work-related and other variables.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 56
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 373-386 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: A model integrating work-role expectations of employees, work-family conflict, family-work conflict, and a component of burnout was proposed and empirically tested on 163 employees, who were also part of dual-earner couples. Gender differences were found in the proposed model. For males, work-family conflict mediated the relationship between work-role expectations and emotional exhaustion. Although the same indirect relationship was found for females, a direct relationship also existed between work-role expectations and emotional exhaustion. Additionally, for females, family-work conflict was found to be a key contributor to work-family conflict and emotional exhaustion. Managerial implications and future research directions are discussed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 57
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 421-430 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: The paper considers gender identities in higher education. It examines how people involved in university life engage in (re)creating gender identities and in (re)producing gender-related expectations (and stereotypes) of managerial behaviour. The process of construction of feminine identities is explored through the discourses of academics from a UK university (mainly women who hold managerial positions). The paper reports findings from a series of in-depth interviews with women managers (dean, associate deans and heads of departments) and with university academics (men and women) from a Business School, part of a large British new university. The school was of special interest because women held the majority of senior managerial posts. It appears that the process of construction of femininities is mainly developed around four (stereo-)typical aspects generally associated with feminine management practices (multi-tasking, supporting and nurturing, people and communication skills, and team-work).
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 58
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Women in management review 19 (2004), S. 88-97 
    ISSN: 0964-9425
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Sociologie , Wirtschaftswissenschaften
    Notizen: A two-round Delphi study was conducted with a panel of 41 Canadian female nurse managers selected from hospitals with at least 100 beds, in the province of Alberta, Canada. The Delphi study examined the changing roles of First-line nurse managers (FLNMs) and major challenges they face with the aim of identifying major stressors and presenting recommendations for senior health care administrators to effectively support FLNMs in the future. Findings underscored the need to better prepare FLNMs for their changing and challenging roles. Organizations need to provide FLNMs with the resources to ensure quality patient care and enable them to spend more quality time executing their management responsibilities. Health care organizations should consider using a more participative management style, with mentoring, to empower and effectively use the extensive experience of their FLNMs to tackle the challenges of the future.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 59
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 15-20 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: Present methods of establishing inspection and maintenance programs for wood poles are prescriptive in nature and do not consider the life data of poles in a particular region. In this paper, a methodology is discussed for estimating the useful life of older poles having survived a certain number of years, using life data analysis. A procedure is presented to establish the timing of the next inspection of older poles based on the current acceptable replacement rate.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 60
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 173-186 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: Shielding of electromagnetic low frequency field can be performed by means of conductive sheets. These sheets have a thickness which is usually two or three orders of magnitude lower than their other dimensions, thus their effects must be modeled by means of special numerical techniques. In this paper, two integral formulations for the analysis of conductive shields are presented: one is two-dimensional and is based on a multiconductor system, while the other, three-dimensional, is based on a finite formulation of electromagnetic fields. Once these analysis tools have been introduced, this paper presents the study of different shielding systems and a problem of optimal exploitation of conductive material.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 61
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 263-276 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: Surge protective devices are used to limit the maximum voltage on protected circuits. In the last decade, metal oxide varistors (MOVs) have been the most used protective devices. Since many of the outages experienced on sensitive circuits are due to overvoltages originated by the effects of direct and nearby lightning flashes, it is important to evaluate the reliability of such protective devices under lightning stress. Actually, MOVs are affected by ageing, essentially due to the number and amplitude of stresses, and also other factors such as overheating, pollution and humidity. The aim of this paper is to present a method, based on probabilistic arguments, to evaluate the ageing process of MOVs. The expected life, so obtained, can be used to decide when the MOV must be changed before its failure occurs (reliability assessment), since the main standards do not give definitive indications about such features. The estimated expected life can be used in the design of logistic/maintenance procedures.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 62
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 487-505 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper presents analytical and experimental results that quantify the performance of an induction motor fed by a space-vector pulse width modulated four-switch (B4) voltage source inverter. First, as voltage vectors in the inverter form unsymmetrical sequences, the discrete Fourier transform is used to express the voltage vectors in symmetrical form. Second, by using a mixed p-z approach for every voltage vector sequence, we can derive a closed-form solution, including steady-state and transient components of the motor currents. From the motor currents, we can derive an analytical equation for the electromagnetic torque. Both the steady-state and transient components of the motor currents are determined in a simple and lucid analytical form, which avoids involved matrix inversion as well as exponentiation. The theoretical considerations are verified on an experimental unit.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 63
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 694-700 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: Discusses a parallel algorithm for the finite-difference time domain method. In particular, investigates electromagnetic field propagation in two and three dimensions. The computational intensity of such problems necessitates the use of multiple processors to realise solutions to interesting problems in a reasonable time. Presents the parallel algorithm with examples, and uses aspects of graph theory to examine the communication overhead of the algorithm in practice. This is achieved by observing the dynamically changing adjacency matrix of the communications graph.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 64
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: The dynamic model of radial active magnetic bearings, which is based on the current and position dependent partial derivatives of flux linkages and radial force characteristics, is determined using the finite element method. In this way, magnetic nonlinearities and cross-coupling effects are considered more completely than in similar dynamic models. The presented results show that magnetic nonlinearities and cross-coupling effects can change the electromotive forces considerably. These disturbing effects have been determined and can be incorporated into the real-time realization of nonlinear control in order to achieve cross-coupling compensations.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 65
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper deals with the problem of magnetization identification. We consider a ferromagnetic body placed in an inductor field. The goal of this work is, from static magnetic field measurements taken around the device, to obtain an accurate model of its magnetization. This inverse problem is usually ill-posed and its solution is non-unique. It is then necessary to use mathematical regularization. However, we prefer to transform it to a better posed one by incorporating our physical knowledge of the problem. Our approach is tested on the magnetization's identification of a real ferromagnetic sheet.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 66
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: In this communication, the Preisach and Jiles-Atherton models are studied to take hysteresis phenomenon into account in finite element analysis. First, the models and their identification procedure are briefly developed. Then, their implementation in the finite element code is presented. Finally, their performances are compared with an electromagnetic system made of soft magnetic composite. Current and iron losses are calculated and compared with the experimental results.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 67
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 835-844 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: A bound for a norm of the difference between the computed and exact solution vectors for static, stationary or quasistationary non-linear magnetic fields is derived by employing the polarization fixed point iterative method. At each iteration step, the linearized field is computed by using the finite element method. The error introduced in the iterative procedure is controlled by the number of iterations, while the error due to the chosen discretization mesh is evaluated on the basis of the hypercircle principle.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 68
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: The combined current-voltage instrument transformer (CCVIT) is a complex non-linear electromagnetic system with increased voltage, current and phase displacement errors. Genetic algorithm (GA) coupled with finite element method (FEM-3D) is applied for CCVIT optimal design. The optimal design objective function is the metrological parameters minimum. The magnetic field analysis made by FEM-3D enables exact estimation of the four CCVIT windings leakage reactances. The initial CCVIT design is made according to analytical transformer theory. The FEM-3D results are a basis for the further GA optimal design. Compares the initial and GA optimal output CCVIT parameters. The GA coupled with FEM-3D derives metrologically positive design results, which leads to higher CCVIT accuracy class.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 69
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 625-632 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: Applies the field/circuit two-dimensional method and improved circuit method to engineering designs of the induction motor with stator cores made of amorphous iron. Exploiting of these methods makes possible computation of many different specific parameters and working curves in steady states for the "high efficiency" three-phase small induction motor. Compares the results of this calculation with the results obtained for the classical induction motor with identical geometric structure.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 70
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 647-654 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper presents a magnetoelastic dynamic FE model. As first approach, the effect of magnetostriction and strong coupling is not considered. The effect of Rayleigh damping factors on the vibrational behaviour of the stator core of a synchronous generator is studied using the presented model. It shows that the static approach is not accurate enough and the difference between calculations with damped and undamped cases is too important to be ignored. However, the difference between damped cases with reasonable damping is not very important.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 71
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper deals with the incorporation of a vector hysteresis model in 2D finite-element (FE) magnetic field calculations. A previously proposed vector extension of the well-known scalar Jiles-Atherton model is considered. The vectorised hysteresis model is shown to have the same advantages as the scalar one: a limited number of parameters (which have the same value in both models) and ease of implementation. The classical magnetic vector potential FE formulation is adopted. Particular attention is paid to the resolution of the nonlinear equations by means of the Newton-Raphson method. It is shown that the application of the latter method naturally leads to the use of the differential reluctivity tensor, i.e. the derivative of the magnetic field vector with respect to the magnetic induction vector. This second rank tensor can be straightforwardly calculated for the considered hysteresis model. By way of example, the vector Jiles-Atherton is applied to two simple 2D FE models exhibiting rotational flux. The excellent convergence of the Newton-Raphson method is demonstrated.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 72
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: Sets out a method for determining the dangerous areas on the soil surface. The touch voltages are calculated by a Maxwell's subareas program. The search for the areas in which the touch voltages are dangerous is performed by a suitably modified genetic algorithm. The fitness is redefined so that the genetic algorithm does not lead directly to the only optimum solution, but to a certain number of solutions having pre-arranged "goodness" characteristics. The algorithm has been called "quasi-genetic" algorithm and has been successfully applied to various grounding systems.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 73
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 662-669 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: Magnetostatic problems including iron components can be solved by a nonlinear indirect volume integral equation. Its unknowns are scalar field sources. They are evaluated iteratively. In doing so the integral representation of fields has to be calculated. At edges singularities occur. Following a method to calculate the field strength on charged surfaces a way out is presented.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 74
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 1053-1061 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: The LF magnetic field (50?Hz-100?kHz) generated in the air by electrical appliances is characterised using multipoles. The maximum likelihood estimation of an equivalent multipolar source is computed using a genetic algorithm. The choice of the position and the number of measurement points are discussed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 75
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 1100-1109 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper deals with a coupled field-circuit simulation of transients in a three-phase, three-limb power transformer taking non-linearity into consideration. A comparative analysis of the results obtained from the application of 3D and 2D field models has been carried out. Owing to core saturation and the non-periodic components of the magnetic fluxes, the magnetic field exists also within the space surrounding the core. Hence, three-dimensional description is necessary. It has been proved that assuming the 2D model significantly overstated peak values of currents are obtained.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 76
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: The coupling between a 3D modified magnetic vector potential formulation discretized by the finite integration technique and an electrical circuit that includes solid and stranded conductors is presented. This paper describes classical time integration methods and the implicit Runge-Kutta methods, the latter being an appropriate alternative to the first ones to solve effectively index 1 differential-algebraic equations arising from combined simulation of electromagnetic fields and electrical circuits.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 77
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 225-236 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: One of the important decision problems for a power system operator is to choose the appropriate operation point when possible contingencies must be considered. The operator may decide to do nothing or to take some actions that change the operating point and decrease the negative impact (cost) of some or all the contingencies. The purpose of this paper is to investigate the applicability of utility and value functions to this decision problem, since the large range of consequences raises some doubts about the fulfillment of the theoretical conditions imposed by Decision Theory. Although not essential to this discussion, some alternatives to prescriptive methodologies are presented and discussed, mostly regarding the definition of risk attributes and other determinist equivalents, suitable for multicriteria analysis.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 78
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 133-147 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: The present paper is intended to analyze time-varying harmonic absorption of single-phase non-linear loads. To this aim, it is demonstrated that a continuous harmonic monitoring can be of a certain utility, since this practice allows a better characterization of harmonic spectra and an improved understanding of impact due to the various stages of typical operation. Some selected results obtained from a wide monitoring activity performed in a lab are reported in this paper. The results are relevant to NL appliances with power ratings ranging from less than 10?W to several hundred watts, such as desktop PC, printer (both laser and ink-jet), cell phone battery charger, and photocopier. The data thus obtained have been processed in order to determine probability density functions and distribution functions well evidencing the time-varying behavior of harmonic content of the absorbed current. Since a continuous harmonic monitoring allows to follow the nearly instantaneous evolution of the physical quantities (voltage and current) a cross-correlation based analysis of the various harmonic quantities among themselves is more meaningful than the monitoring activities providing longer observation time windows (up to minutes). The results obtained with such calculations can provide good indications for determining the origin of the time-varying behavior as evidenced.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 79
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 197-208 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper presents a method used to validate a spatial load forecasting model based on fuzzy systems implemented in a Geographical Information System. The validation process confirms the adequacy of the rule base, and also it is strictly necessary to define the confidence intervals associated to the predicted spatial demand.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 80
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 250-262 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper proposes an integrated approach of genetic algorithms, Tabu search and simulated annealing for multi-stage (dynamic) transmission network expansion planning. The proposed algorithm integrates the most interesting and best features of the above individual algorithms. The efficiency and reliability of the proposed algorithm is proved with the modified Garver's six-bus network. Finally, a real-world application (Sri Lankan transmission network) of the integrated algorithm is presented for multi-stage transmission expansion planning.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 81
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 277-285 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: A new direct blind equalization algorithm is presented in this paper. It relies on the auto-correlation matrix of the channel, and adopts its eigenvector decomposition for designing an equalizer, which exploits the correlation characteristics of the channel. The proposed equalization is insensitive to the inaccuracy of the channel order estimation, and its data sequence length required for estimating the channel's correlation matrix is shorter than that of the other eigenvector decomposition methods that assumed that the channel order was known or had been estimated. Simulation results show that this algorithm is capable of acquiring a good performance under lower SNR in a communication system employing 16-QAM modulation.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 82
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: The finite element (FE) method calculations are used to improve dynamic behavior of the two-axis linear synchronous reluctance motor (LSRM) model, which is appropriate for the control design, the real time applications and the low speed servo applications. By the FE method, calculated current and position dependent flux linkages, their partial derivatives and motor thrust are approximated by the continuous functions and incorporated into the dynamic LSRM model as a nonlinear iron core model. The agreement between the calculated and the measured flux linkages, their partial derivatives and the motor thrust is very good. The agreement between all trajectories calculated by the improved dynamic LSRM model and measured during the experiment in the case of kinematic control is very good as well.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 83
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 381-391 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: Classical techniques to estimate the spectrum of the multi-component signal are based on Fourier-based transformations. The frequency estimates obtained from their spectral peaks are affected by the window length and phase of signal component, thus presenting a large variance even in the absence of noise. The spectrum of the signals is estimated with the help of the Wigner-Ville distribution and its time-frequency representation is obtained. For the same purpose, the min-norm method (subspace method) is used. The accuracy of the tested methods was investigated and compared with the parameters of the frequency estimation via FFT. The proposed methods were also tested with non-stationary multiple-component signals occurring during the fault operation of inverter-fed drives and transmission lines.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 84
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: For anisotropic materials, the magnetic field vector H? and the flux density vector B? are parallel with each other only along a few distinct directions. When performing unidirectional measurements, only the component of B? along the direction under consideration is measured. It is not possible to deduce the angle between B? and H? from unidirectional measurements alone. For ferromagnetic materials having a Goss-texture, as most transformer steels have, this paper demonstrates a way to compute this angle a posteriori, by the combination of measurements with a physical anisotropy model.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 85
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 392-409 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper presents method to discriminate between transient voltage stability and voltage sag. The discrete wavelet transform (WT) is a powerful tool in the analysis of the transient phenomena in power systems because of its ability to extract information in both the time and frequency domain. This paper introduces a technique for accurate discrimination by combining WTs with neural networks (NNs). The WT is first applied to decompose the signals into a series of detailed wavelet components. The wavelet components are calculated and then employed to train a NN. The simulated results presented clearly show that the proposed technique can accurately discriminate between transient voltage stability and voltage sag in power system protection.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 86
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 410-425 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: Time-depending solutions to the Boltzmann-Poisson system in one spatial dimension and three-dimensional velocity space are obtained by using a recent finite difference numerical scheme. The collision operator of the Boltzmann equation models the scattering processes between electrons and phonons assumed in thermal equilibrium. The numerical solutions for bulk silicon and for a one-dimensional n+-n-n+ silicon diode are compared with the Monte Carlo simulation. Further comparisons with the experimental data are shown.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 87
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 79-91 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: Market liberalisation has resulted in significant changes not only in the way electricity is traded, but also for the market participants themselves. The bidding behaviour of market participants who are active in a liberalised UK-like market has been modelled. Both operational and technical parameters associated with the market and its participants are accounted for. Explicit characterization of risk (value at risk) is made with respect to market participants and their attitude to trading. Profit maximization strategies for market participants are then developed based on the minimization of price-risk under uncertainty. Results are presented for a selected case study and the effect of alternative strategies is compared. The case study concerns several generators who need to determine what proportion of their production they should sell to the market. The results show that based on cost and price forecasts there is scope for generators to profitably take advantage of both contractual and within-day market trades.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 88
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 92-103 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper deals with the uncertainty in digital measurement systems designed for power quality applications. The main goal of this work is to evaluate such uncertainty by means of a Monte Carlo method recently proposed in the literature. The accuracy of the measurement result obtained with a DSP-based instrument for power quality metering depends on the behavior of the devices located in both the conditioning block and A/D conversion stage: it is thus necessary to consider the uncertainties introduced by each component of the system and the propagation of their effects through the measurement chain. Here, the uncertainty is estimated starting from the technical specifications provided by the manufacturers of these devices. Experimental results are reported to show the importance of some concerns about the practical implementation of the proposed methodology in a real instrument.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 89
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper deals with a new formulation of the optimal operation of electrical distribution networks problem in regular working state. In the new deregulated energy market providing reliable and economical service to customers is a primary task. The multiobjective formulation of the reconfiguration and compensation problem used in this paper considers as a primary object also the minimisation of the load nodes unavailability (UA) expressed in probabilistic terms. Therefore, the objectives to be attained through the optimisation strategy are: minimal power losses operation, minimum UA of the load nodes, load balancing among the HV/MV transformers, and voltage profile regularisation. The application carried out uses an evolutionary algorithm and a particular normalisation technique for the multiple objectives formulation. In the considered automated network, the remote control of capacitor banks and tie-switches is possible and their layout is the optimisation variable. After a brief description of the optimal reconfiguration and compensation problem for automated distribution networks, the most recent papers on the topic are reported and commented. Then the problem formulation and the solution algorithm are described in detail. Finally, the test results on a large MV distribution network are reported and discussed.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 90
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 119-132 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: The assessment of the quality of the electric power supply, as well as that of the electric loads, is becoming a critical problem, especially when the liberalization of the electricity market is involved. Power quality can be evaluated by means of a number of quantities and indices whose measurement is not straightforward and is generally attained by means of digital signal processing techniques based on complex algorithms. The assessment of the uncertainty of the results of such measurements is a critical, open problem. This paper proposes a general purpose approach, based on the Monte Carlo method that, starting from the estimated contributions to the uncertainty of each device in the measurement chain, estimates the probability density distribution of the measurement result, and therefore, its standard uncertainty. This approach has been experimentally validated for the active power measurement and applied to the estimation of the uncertainty of the measurement of more complex power quality indices.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 91
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 361-380 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: EDMC represents extended dynamic matrix control, which can be applied to nonlinear process control. In this method, control inputs are determined based on a linear model that approximates the process and is updated during each sampling interval. Since nonlinear relation still exists between the prediction error and the control input, numerical (iterative) methods are used to solve the optimization problem defined in the method. For nonlinear processes with high variation and/or sign changes in their steady-state gain, iterative methods do not converge properly to an acceptable solution for some desired outputs or external disturbances. To eliminate the problem, we augment the process with its steady-state gain inverse (or pseudo inverse whenever required) such that the steady-state gain for the new augmented system is constant or contains slow variations. In the case of unstable processes, the method may be applied after stabilizing the process using a proper state or output feedback. Effectiveness of the method has been examined using computer simulations of some benchmark processes. Some of the obtained results are presented in this paper.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 92
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: A novel 3D shape optimization algorithm is presented for electromagnetic devices carrying eddy current. The algorithm integrates the 3D finite element performance analysis and the steepest descent method with design sensitivity and mesh relocation method. For the design sensitivity formula, the adjoint variable vector is defined in complex form based on the 3D finite element method for eddy current problems. A new 3D mesh relocation method is also proposed using the deformation theory of the elastic body under stress to renew the mesh as the shape changes. The design sensitivity for the surface nodal points is also systematically converted into that for the design variables for the parameterized optimization application. The proposed algorithm is applied to the optimum design of the tank shield model of transformer and the effectiveness is proved.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 93
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 813-824 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper deals with coupled electromagnetic, hydrodynamic and mechanical motion phenomena in magnetorheological fluid devices. The governing equations of these phenomena are presented. The numerical implementation of the mathematical model is based on the finite element method and a step-by-step algorithm. In order to include non-linearity, the Newton-Raphson process has been adopted. A prototype of an electromagnetic brake has been built at the Poznan University of Technology. The method has been successfully adapted to the analysis of this brake. The results of the analysis are presented.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 94
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper presents new trends in parallel methods used to solve finite element matrix systems: standard iterative and direct solving methods first, and then domain decomposition methods. For example, the current status and properties of two prevailing programming environments (PVM and MPI) are finally given and compared when implemented together with a finite element time domain formulation.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 95
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 547-557 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper presents the application in circuit simulation of a method for model reduction of nonlinear systems that has recently been developed for chemical systems. The technique is an extension of the well-known balanced truncation method that has been applied extensively in the reduction of linear systems. The technique involves the formation of controllability and observability gramians either by simulated results or by measurement data. The empirical gramians are subsequently employed to determine a subspace of the full state-space that contains the most significant dynamics of the system. A Galerkin projection is used to project the system onto the subspace to form a lower-dimensional nonlinear model. The method is applied to a nonlinear resistor network which is a standard example for exemplifying the effectiveness of a nonlinear reduction strategy.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 96
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: In the past years, there has been an increasing concern about turn-to-turn faults in power transformers, due to the high costs that unexpected outages cause. It is not always possible to analyse the transformer behaviour under such faults at rated conditions, since the tests are largely destructive. Therefore, models are of great importance to avoid severe damage to machines. In this paper, a model based on flux rearrangement around the damaged turn is presented. Two roles are assigned simultaneously to the damaged turn - i.e. the turn is seen as damaged but segregated from winding, and virtually undamaged belonging to the winding - and the damaged turn leakage flux is considered to be a coupling flux between the two roles. Thus, complex relations of magnetic couplings between the turn and the rest of the transformer are avoided, resulting in a very fast model, easy to develop further, which has been validated through a comparison with a finite element model.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 97
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 572-578 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: The boundary element method has been used to obtain the electrical capacitances of the unit equilateral triangle, square, regular tetrahedron and cube. For each of these objects, a series of values of the number N of segments has been used and then empirical formulae have been used to extrapolate N to infinity. The singularities of the charge densities at the edges and corners of these objects can be characterised by power laws, the relevant exponents of which have also been determined.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 98
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 436-451 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: This paper describes voltage collapse in power system networks and how it could lead to a collapse of the whole system. Discusses the effect of machine learning and artificial intelligence, leading to new methods. Spotlight, the fuzzy decision tree (FDT) method and its application to voltage collapse assessments. Concludes that FDT can identify and group data sets, giving a new understanding of its application in voltage collapse analysis.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 99
    Digitale Medien
    Digitale Medien
    Bradford : Emerald
    Compel 23 (2004), S. 677-684 
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: Describes the algorithm allowing recognition of cracks and flaws placed on the surface of conducting plate. The algorithm is based on sensitivity analysis in finite elements, which determines the influence of geometrical parameters on some local quantities, used as objective function. The methods are similar to that of circuit analysis, based on differentiation of stiffness matrix. The algorithm works iteratively using gradient method. The information on the gradient of the goal function provides the sensitivity analysis. The sensitivity algorithm allows us to calculate the sensitivity versus x and y, so the nodes can be properly displaced, modeling complicated shapes of defects. The examples show that sensitivity analysis applied for recognition of cracks and flaws provides very good results, even for complicated shape of the flaw.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 100
    ISSN: 0332-1649
    Quelle: Emerald Fulltext Archive Database 1994-2005
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Mathematik
    Notizen: The sliding-surface and moving-band techniques are introduced in frequency-domain finite element formulations to model the solid-body motion of the rotors in an cylindrical machine. Both techniques are compared concerning their feasibility and computational efficiency. A frequency-domain model of a capacitor motor is equipped with a sliding surface and compared to a transient model with moving band. This example illustrates the advantages of frequency-domain simulation over transient simulation for the simulation of steady-state working conditions of electrical machines.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...