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  • 1
    Series available for loan
    Series available for loan
    Entwicklung einer leitbildorientierten Methode zur Bewertung des ökologischen Zustands von Seen anhand der Fischfauna : Ergebnisbericht für die Zeit vom 01.05.2001 - 30.04.2004
    Berlin : IGB
    Associated volumes
    Details Availability
    Call number: ZS-017(21)
    In: Berichte des IGB
    Type of Medium: Series available for loan
    Pages: 202 S. , graph. Darst.
    Series Statement: Berichte des IGB 21
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Structure of silicon monoxide dimer: a comparison between aluminum monofluoride dimer, silicon monoxide dimer, and phosphorus mononitride dimer. Matrix infrared investigation and ab initio calculation (1989)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 111 (1989), S. 4578-4582 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00195a008
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  • 3
    Electronic Resource
    Electronic Resource
    Mass Spectra of Polynuclear Metal Carbonyl Hydrides1 (1967)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 89 (1967), S. 1759-1760 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00983a056
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  • 4
    Electronic Resource
    Electronic Resource
    Ein Vorgehensmodell für die Multimedia-Entwicklung mit Autorensystemen (1999)
    Springer
    Informatik, Forschung und Entwicklung 14 (1999), S. 83-94 
    Details
    ISSN: 0949-2925
    Keywords: Schlüsselwörter Multimedia, Vorgehensmodell, Modellierung, Framework, Autorensystem ; Key words:Multimedia, process model, modeling, framework, design, authoring system ; CR Subject Classification: D.2.2, D.2.11, H.5.1, H.5.4, K.6.3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Abstract. Multimedia applications are interactive software systems and should therefore be developed using software engineering techniques. They are nowadays built using authoring systems that support ad hoc implementation without a preceding modeling phase. Because of that and due to the lack of established process models for multimedia software development, the development process is reduced mainly to the implementation phase. This leads to problems well-known in software engineering like missing conceptualization and missing documentation. In this paper, we present a process model for the development of multimedia applications which is centered upon an analysis and a design phase with regard to an implementation with an authoring system. Starting from a framework-based analysis model of the application and a model of the programming capabilities of a concrete authoring system, an instance-level implementation model can be systematically derived. The proposed process model is exemplarily explained using the Director authoring system for the domain of computer-based training applications.
    Notes: Zusammenfassung. Multimedia-Anwendungen sind interaktive Softwaresysteme und verlangen als solche, mit softwaretechnischen Methoden erstellt zu werden. Sie werden heutzutage in der Regel mit Hilfe von Autorensystemen entwickelt, die eine Ad-hoc-Entwicklung auf Implementierungsniveau unterstützen. Hierdurch und wegen des Fehlens etablierter Vorgehensmodelle für die Multimedia-Softwareentwicklung reduziert sich der Multimedia-Entwicklungsprozeß auf die Implementierungsphase. Dies führt zu den in der Softwaretechnik bekannten Problemen wie mangelnder Konzeption und fehlender Dokumentation. Wir stellen in diesem Beitrag ein Vorgehensmodell für die Entwicklung von Multimedia-Anwendungen vor, in dessen Mittelpunkt eine Analyse- und Entwurfsphase im Hinblick auf eine Implementierung der Multimedia-Anwendung mit einem Autorensystem stehen. Ausgehend von einem frameworkbasierten Analysemodell der Anwendung und einem Modell der Realisierungsmöglichkeiten mit einem konkreten Autorensystem wird systematisch ein Implementierungsmodell auf Instanzebene abgeleitet, das als Eingabe für das Autorensystem verwendet wird. Das postulierte Vorgehensmodell wird exemplarisch für das Autorensystem Director am Beispiel der Domäne multimedialer Lehr-/Lernanwendungen erläutert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004500050128
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  • 5
    Electronic Resource
    Electronic Resource
    Can feeding of European catfish prevent cyprinids from reaching a size refuge? (2005)
    Oxford, UK : Munksgaard International Publishers
    Ecology of freshwater fish 14 (2005), S. 0 
    Details
    ISSN: 1600-0633
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract – The size structure of a predator population can cause differences in the relative survival of different prey length classes whereby the biggest prey may reach a safe size because of the size-dependent character of predation. In the present study, the diet of European catfish was investigated to examine if catfish feeding can prevent cyprinids from reaching such a size refuge. In the lake studied, catfish was stocked for biomanipulation purposes to reduce unwanted roach and bream populations. Crayfish and roach were the most important prey items of catfish. If only species composition in the diet was considered, no clear changes were recorded in relation to catfish size. However, the length of roach as prey significantly increased with catfish length. Catfish were significantly larger than the other piscivorous fish in the lake, but took relatively smaller roach in comparison with similar-sized pike or pikeperch. Nevertheless, because of the high mean length of catfish, roach cannot reach a size refuge. For unknown reasons, the expected and intended predation on bream was not observed. Catfish took smaller prey than could be expected from mouth gape data. By extending the relationship between catfish as predator and roach as prey beyond the predator length range currently found in the lake, it could be shown that even catfish of 150 cm length will probably feed upon only 65% of all available bream length classes. Therefore, stocking with catfish cannot prevent a size refuge for the bream.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0633.2004.00081.x
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  • 6
    Electronic Resource
    Electronic Resource
    Interactions between juvenile roach or perch and their invertebrate prey in littoral reed versus open water enclosures (2005)
    Oxford, UK : Munksgaard International Publishers
    Ecology of freshwater fish 14 (2005), S. 0 
    Details
    ISSN: 1600-0633
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract – Structural complexity offered by submerged macrophytes was shown to have fundamental effects on interactions between fish and their prey. However, less information is available for littoral reed (Phragmites spp.) stands. A previous field study found juvenile roach and perch to coexist within the reed stands. It was suggested that reed serves mainly as refuge against littoral piscivores, such that coexistence of perch and roach in the reed was externally forced. Several hypotheses were raised to explain why roach nevertheless showed good growth performance. Three of the hypotheses were tested experimentally. In particular, we were interested in how the confinement of fish to one of the reed or open water habitats alters feeding and growth patterns of juvenile age-1 perch and roach. Fish were stocked separately into littoral enclosures for a 3-week period in densities which had been found in the surrounding lake. Development of zooplankton and macroinvertebrate biomasses was observed by sampling the enclosures three times over the experimental period. Individual consumption of prey groups by the fish was calculated with a bioenergetics model, and was compared with prey group biomass in the enclosure treatments. The confinement of fish to one littoral habitat had clear effects on diet composition and growth rates. Roach fed less zooplankton and partially switched to macroinvertebrates in the reed enclosures when compared with the open water treatments, and consequently their growth rates were lower in the reed. Perch preferred macroinvertebrates in both habitats, without any difference in growth rates between the habitats. Effects of fish predation on both zooplankton and macroinvertebrate biomass were low in open water and reed enclosures. Daily consumption rates were only in a few cases higher than 40% of the available biomass of the respective prey group, but mainly were below 10% of available biomass. Therefore, we argue that both the diel horizontal migrations of roach and the relatively low consumption rate of fish when compared with the available resource biomass allow the coexistence of juvenile roach and perch in littoral reed stands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0633.2005.00086.x
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  • 7
    Electronic Resource
    Electronic Resource
    Distribution and feeding of juvenile fish on invertebrates in littoral reed (Phragmites) stands (2005)
    Oxford, UK : Munksgaard International Publishers
    Ecology of freshwater fish 14 (2005), S. 0 
    Details
    ISSN: 1600-0633
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract – Complex interactions between fish predators and their prey have been found in structurally complex habitats built by submerged macrophytes. In contrast, the role of comparably structured littoral reed stands in shaping biotic interactions has not been investigated. We hypothesised that reed stands may be a valuable feeding habitat for juvenile fish, and that perch and roach may segregate along the spatial and dietary niche dimensions between reed and open water habitats. In contrast, the protection effect of reed against predators was assumed to be rather low because of the lower plant volume infested in reed when compared with submerged macrophytes. We analysed biomass and growth of juvenile (age 0 and age 1) perch and roach in littoral reed habitats and in open water habitats in front of the reed in the shallow Lake Müggelsee over 4 months in 2000. Sampling was conducted by point-abundance electrofishing over the full diel cycle (day, dusk, night, dawn). Zooplankton and benthos biomasses were determined in both habitats as well, and habitat-specific diet of fish was assessed during day and night. Roach were more frequent than perch in both habitats. Food of roach included a higher proportion of zooplankton, whereas perch fed more on macroinvertebrates. Overall, diet overlap between the fish groups was high. Diel distribution of fish did not follow the expectations of habitat segregation between perch and roach. Instead, the function of reed as refuge habitat against littoral piscivores (mainly birds) may have caused the strong daytime preference for reed in almost all fish groups, which was partly upset by roach at night. The higher behavioural plasticity of roach may explain their good performance even under the conditions of high structural complexity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0633.2005.00087.x
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  • 8
    Electronic Resource
    Electronic Resource
    The use of rigid organic microemulsions to fix liquid solutions for Mossbauer studies
    Amsterdam : Elsevier
    Inorganica Chimica Acta 198-200 (1992), S. 867-871 
    Details
    ISSN: 0020-1693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0020-1693(00)92432-0
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  • 9
    Electronic Resource
    Electronic Resource
    Two novel antimony chalcogenide compounds and their mossbauer investigation
    Amsterdam : Elsevier
    Inorganica Chimica Acta 132 (1987), S. 149-151 
    Details
    ISSN: 0020-1693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0020-1693(00)81732-6
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  • 10
    Electronic Resource
    Electronic Resource
    Complex formation and liquid-liquid extraction of tin with potentially tridentate dianionic ligands
    Amsterdam : Elsevier
    Analytica Chimica Acta 170 (1985), S. 319-324 
    Details
    ISSN: 0003-2670
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0003-2670(00)81756-0
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