ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Collection
Keywords
Publisher
  • 1
    ISSN: 1573-7357
    Keywords: 74.20.−z ; 74.25.Gz ; 74.20.Fg
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Recent measurements of the penetration depth and optical conductivity in YBa2Cu3Ox (YBCO) single crystals suggest the possibility of an order parameter with d+s-wave symmetry. We present results from calculations of both the anisotropic low temperature penetration depth and the frequency-dependent conductivity for a layered superconductor with such a pairing symmetry. The system is modelled as a stack of weakly coupled, two dimensional superconducting planes, and the effect of non-magnetic impurity scattering in both Born and unitarity limits is examined.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present a theoretical study of the spin-spin correlation functionC(r) in a superconductor, whereC(r) = 〈S · s(r)〉;S is an impurity spin operator, ands(r) is the conduction electron spin density operator. We model the impurity using the Anderson Hamiltonian, and use the U → ∞, 1/N expansion to do the calculations. In addition to conventional superconductors, we consider unconventional superconductors, in which the order parameter Δ(k) has a lower rotational symmetry, and has vanishing angular average. Of particular interest is the way that the behavior ofC(r) reflects two length scales, the Kondo length ξk and the superconducting coherence length, ξ0, and the way that its behavior is affected by the angular dependence of unconventional gaps.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1572-9451
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The survivability for ATM based B‐ISDN has become an important challenge for telecommunication network planners and engineers. In this paper, we consider multiple grades of reliability concept and a multilayer survivable network architecture for survivable ATM networks. We address two complementary ATM VP restoration schemes in this paper. First, we propose preplanned rerouting models and algorithms based on combinatorial optimization to prepare efficient backup VP configuration. We test two formulations and algorithms for this problem. Efficient column generation technique to solve linear programming relaxation and strong valid inequalities incorporating the branch‐and‐bound scheme are suitable to solve the problem to optimality within small time limits. Second, we propose a new dynamic VP path restoration scheme to restore nonprotected VPs by the preplanned rerouting. Our protocol has shown the advantage in restoration effectiveness comparing a well‐known protocol in computational simulation. We, finally, address the relationships between the suggested models of this paper and the expected results of our ongoing project.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2014-03-24
    Description: Energy efficiency is one of the most important issues for operations of wireless sensor networks. To increase network lifetime and to reduce energy consumption of sensor nodes, many clustering and routing protocols have been studied. In this paper, we propose an energy-efficient cooperative communication method which forms clusters and establishes intercluster routes directly or via relay nodes. Relay nodes selected by the cooperation of adjacent cluster heads along with their cluster members can prevent long-haul transmissions of cluster heads. This can reduce the energy consumption of cluster heads. We show the validity of using relay nodes and then compare the performance of the proposed method with that of a well-known clustering and routing protocol for wireless sensor networks. Our computational experiments demonstrate that network lifetime, energy consumption, and scalability of the proposed method are better than those of the compared method.
    Print ISSN: 1550-1329
    Electronic ISSN: 1550-1477
    Topics: Electrical Engineering, Measurement and Control Technology
    Published by Hindawi
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2013-04-01
    Description: Energy efficiency is one of the most important issues for WSNs, because the battery of each wireless sensor node cannot be recharged or replaced. Therefore, all batteries have to be well managed, in order to provide a long network lifetime, as well as to reduce energy consumption for WSNs, particularly in clustering and routing. In this paper, we propose an energy-efficient self-organized clustering model with splitting and merging (EECSM), which performs clustering and then splits and merges clusters for energy-efficient cluster-based routing. EECSM uses information of the energy state of sensor nodes, in order to reduce energy consumption and maintain load balance. We show the validity of splitting and merging of clusters and then compare the performance of the proposed EECSM with that of a well-known cluster-based self-organization routing protocol for WSNs. The results of our experiment show good performance of EECSM, in terms of network lifetime, residual energies, scalability, and robustness.
    Print ISSN: 1550-1329
    Electronic ISSN: 1550-1477
    Topics: Electrical Engineering, Measurement and Control Technology
    Published by Hindawi
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Publication Date: 2018-01-01
    Description: Sensors, Vol. 18, Pages 98: A Localized Surface Plasmon Resonance Sensor Using Double-Metal-Complex Nanostructures and a Review of Recent Approaches Sensors doi: 10.3390/s18010098 Authors: Heesang Ahn Hyerin Song Jong-ryul Choi Kyujung Kim From active developments and applications of various devices to acquire outside and inside information and to operate based on feedback from that information, the sensor market is growing rapidly. In accordance to this trend, the surface plasmon resonance (SPR) sensor, an optical sensor, has been actively developed for high-sensitivity real-time detection. In this study, the fundamentals of SPR sensors and recent approaches for enhancing sensing performance are reported. In the section on the fundamentals of SPR sensors, a brief description of surface plasmon phenomena, SPR, SPR-based sensing applications, and several configuration types of SPR sensors are introduced. In addition, advanced nanotechnology- and nanofabrication-based techniques for improving the sensing performance of SPR sensors are proposed: (1) localized SPR (LSPR) using nanostructures or nanoparticles; (2) long-range SPR (LRSPR); and (3) double-metal-layer SPR sensors for additional performance improvements. Consequently, a high-sensitivity, high-biocompatibility SPR sensor method is suggested. Moreover, we briefly describe issues (miniaturization and communication technology integration) for future SPR sensors.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 2019
    Description: Successful outsourcing strategy is a key enabler of sustainable competitiveness of established firms engaged in technology-intensive business. This study proposes a research framework of a successful outsourcing process composed of resources, dynamic capabilities and created values, from a review of relevant literature and in-depth case study of four leading medical device firms. The research results specify four outsourcing types according to the characteristics of outsourced resources, and their alignment with resources owned by the outsourcer. Each type of outsourcing is positively affected by the outsourcer’s dynamic capabilities, namely sensing, integrating capability, absorptive capability and technology transfer capability. In addition, the significance of the outsourcee’s size according to each outsourcing type is also found. As a result of successful outsourcing experience, the outsourcer can reap the benefits of enhanced dynamic capabilities, i.e., market-oriented innovation, strategic flexibility, agility and increased efficiency, thereby creating a virtuous cycle of sustainable competitiveness in a volatile environment.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...