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  • 1
    Electronic Resource
    Electronic Resource
    Macroscopic quantum tunneling and thermal activation in dc SQUID
    Amsterdam : Elsevier
    Physica C: Superconductivity and its applications 153-155 (1988), S. 1409-1410 
    Details
    ISSN: 0921-4534
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0921-4534(88)90345-0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of inhomogeneities on the fluctuation-induced cusp in the specific heat of high temperature superconductors
    Amsterdam : Elsevier
    Physica C: Superconductivity and its applications 161 (1989), S. 555-559 
    Details
    ISSN: 0921-4534
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0921-4534(89)90096-8
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Tunneling spectroscopy in Ba"1"-"xK"xBiO"3
    Amsterdam : Elsevier
    Physica C: Superconductivity and its applications 185-189 (1991), S. 234-240 
    Details
    ISSN: 0921-4534
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0921-4534(91)91978-D
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Macroscopic quantum tunneling and thermal activation in dc SQUID
    Amsterdam : Elsevier
    Physica C: Superconductivity and its applications 153-155 (1988), S. 1409-1410 
    Details
    ISSN: 0921-4534
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0921-4534(88)90345-0
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    All-high Tc Josephson tunnel junction: Ba1−xKxBiO3/Ba1−xKxBiO3 junctions (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 58 (1991), S. 95-96 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have fabricated all-high Tc superconducting tunnel junctions in the material Ba1−xKxBiO3. The junctions are of very high quality and have a Josephson supercurrent. For the low-resistance junctions, the IcR product approaches the theoretical limit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104402
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis and properties of a-axis and b-axis oriented GdBa2Cu3O7−δ high Tc thin films (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 2598-2600 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the growth and properties of a-axis oriented GdBa2Cu3O7−δ high Tc thin films on (100) SrTiO3 substrates by dc magnetron sputtering. It is found that GdBa2Cu3O7−δ films on (100) SrTiO3 exhibit a-oriented growth at higher substrate temperatures compared with YBa2Cu3O7−δ films. By utilizing low-temperature-grown a-axis GdBa2Cu3O7−δ films (200 A(ring) in thickness) as a self-template, pure a-axis films can be grown at elevated temperatures. The growth of b-axis film on vicinal (100) SrTiO3 under similar growth conditions is also reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.108139
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  • 7
    Electronic Resource
    Electronic Resource
    Collision: Modeling, simulation and identification of robotic manipulators interacting with environments (1995)
    Springer
    Journal of intelligent and robotic systems 13 (1995), S. 1-44 
    Details
    ISSN: 1573-0409
    Keywords: Artificial Neural Networks ; contact models ; collision identification ; collision modeling ; collision attributes ; viscoelastic models
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The performance of many robotic tasks depends greatly on their dynamic collision behavior. This article presents a simple method for modeling and simulating collision behavior in manipulators. The main goal in this task is to provide informative contact models. The proposed models encompasscollision attributes which comprise not only (local) contact surface properties but also structural properties of the environmental object and the manipulator. With this method, the entire dynamic and interactive motion of the manipulator with the environmental object can be simulated effectively. This is verified by our simulation results. To facilitate our investigation, a 2 DOF planar elbow manipulator with PD control is considered in the simulations as well as theoretical analysis. The simulation results are used to highlight the collision attributes which affect collision behavior and to study the effects of these attributes on the manipulator-work environment safety and performance. On the other hand, the reliable operation of intelligent robotic systems in unstructured environments requires the estimation of collision attributes before the prediction of the collision behavior can be completed. For this purpose, we introduce the notion ofcollision identification. The present paper introduces a framework for collision identification in robotic tasks. The proposed framework is based on Artificial Neural Networks (ANNs) and provides fast and relatively reliable identification of the collision attributes. The simulation results are used to generate training data for the set of ANNs. A modularized ANN-based architecture is also developed to reduce the training effort and to increase the accuracy of ANNs. The test results indicate the satisfactory performance of the proposed collision identification system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01664754
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  • 8
    Electronic Resource
    Electronic Resource
    A Fast Approach for Robot Motion Planning (1999)
    Springer
    Journal of intelligent and robotic systems 25 (1999), S. 187-212 
    Details
    ISSN: 1573-0409
    Keywords: robot motion planning ; inverse kinematics ; potential filed ; simulated annealing ; pseudoinverse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper describes a new approach to robot motion planning that combines the end-point motion planning with joint trajectory planning for collision avoidance of the links. Local and global methods are proposed for end-point motion planning. The joint trajectory planning is achieved through a pseudoinverse kinematic formulation of the problem. This approach enables collision avoidance of the links by a fast null-space vector computation. The power of the proposed planner derives from: its speed; the good properties of the potential function for end-point motion planning; and from the simultaneous avoidance of the links collision, kinematic singularities, and local minima of the potential function. The planner is not defined over computationally expensive configuration space and can be applied for real-time applications. The planner shows to be faster than many previous planners and can be applied to robots with many degrees of freedom. The effectiveness of the proposed local and global planning methods as well as the general robot motion planning approach have been experimented using the computer-simulated robots. Some of the simulation results are included in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008028507522
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  • 9
    Electronic Resource
    Electronic Resource
    A multi-layered learning model (1993)
    Springer
    Journal of intelligent and robotic systems 8 (1993), S. 399-423 
    Details
    ISSN: 1573-0409
    Keywords: Meta-Learning ; concurrent learning ; opportunistic learning ; blackboard systems ; machine learning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The growth of technology is leading mankind to an increased awareness of the need for more intelligent systems. However, one of the bottlenecks in building intelligent systems is the difficulty of acquisition, testing and refinement of domain specialists' knowledge. Learning capability offers a way through this bottleneck. In this paper, we describe a general-purpose learning model for use in an unstructured environment. The proposed model exploits different learning techniques to improve the coordination, to increase task and resource allocation efficiency and to refine problem-solving skills of system elements. The utility of such system is most evident in complex domains such as ‘grasping unknown objects by a dextrous hand’. An example of the proposed model is illustrated by an intelligent dextrous hand which learns to grasp unknown objects. Moreover, an expert system for grasp mode selection was implemented in a software package and an example of grasp mode generation is demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01257951
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  • 10
    Electronic Resource
    Electronic Resource
    An intelligent assembly robotic system based on Relative Pose measurements (1995)
    Springer
    Journal of intelligent and robotic systems 12 (1995), S. 49-86 
    Details
    ISSN: 1573-0409
    Keywords: Relative pose-based strategy (REPOS) ; state estimation management ; immediancy spectrum ; intelligent assembly robotic system ; control system ; hierarchical control structure ; layered control structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract One of the major problems in realizing intelligent assembly robotic systems has been the difficulty of compensating for uncertain and erroneous situations. In particular, pose (position and orientation) uncertainties lead to a challenging problem. In this paper, we outline a Relative Pose-based Strategy for effective dynamic end-pont control of manipulators in uncertain environments. The introduced strategy imposes new requirements on the higher levels of the control. Besides appropriate planning, control and sensing strategies, an advanced supervision system architecture needs to be provided. In this paper, the fundamental issues relating to intelligent assembly robotic system design are briefly discussed and an overall control architecture is introduced. The lower portions of the proposed architecture, viz. the Execution and the Supervisory Levels are described in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01258307
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