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Taschenbuch. Zustand: Neu. Neuware - Adult and immature nervous system are capable of considerable 'plasticity' and unravelling the underlying mechanisms is one of the principal and most fascinating goals of Neurobiology. A major contribution to our understanding of neural plasticity has come from recent studies in excitato ry amino acids - which are thought to mediate a large part of the excitatory synaptic transmission on the brain. Important steps in this explosive field are: 1) the synthesis of relatively specific antagonists of the N-methyl-D aspartate (NMDA) and non-NMDA receptors subtypes, 2) the characterization of the unique features of the NMDA receptor channel complex notably its voltage dependent Mg++ blockade, its permeability to calcium and its allosteric modulation by glycine, 3) the demonstration that by virtue of their Ca++ permeability NMDA receptors are involved in many -but not all -synapses in the initiation but not the maintennce of long term potentiation (L TP) an experimented model of learning and memory processes. More recent studies also indicate tha excitatory amino acids also play an important role in developmental plasticity in vivo; in cell cultures low levels of excitatory amino acids have trophic roles and can inhibit or promote neurite growth. Excitatory amino acids also play an important role also in other forms of neural plasticity such as the use dependent permanent changes in neural circuit produced by brief seizures (epileptogenesis) as well as the reactive sprouting and neosynapse formation which take place in epilepsy models and after deafferentiation or lesions.

Taschenbuch. Zustand: Neu. Neuware - The Cryogenic Engineering Conference celebrated its Silver Anniversary at the 1979 Conference held at Madison, Wisconsin. For many it provided an opportunity to reminisce about the first Cryogenic Engineering Conference convened at the National Bureau of Standards in Boulder, Colorado and also about the many following conferences and advances that had been reported at these conferences. It is difficult to realize that the first Cryogenic Engineering Conference was held before the advent of multilayer insulation, the space age, large-scale LNG Operations and superconductivity applications. The evolution of these activities has been carefully recorded in past volumes of the Advances in Cryogenic Engineering. Once again, the Cryogenic Engineering Conference is happy to have had the International Cryogenic Materials Conference cohost this meeting at the University of Wisconsin. Collaboration between these two conferences has proven to be mutually beneficial by providing the cryogenic engineer with an in-depth exposure to materials properties, selection, and utilization to complement the exposure to new applications and design concepts. The papers presented at this joint conference as part of the International Cryogenic Materials Conference will be published as Volume 26 of the Advances in Cryogenic Engineering.

Taschenbuch. Zustand: Neu. Neuware - A Survey of Superconducting Materials.- Fluctuations in Superconductors.- Superconductivity at High Pressures.- Structure of a Vortex in a Dirty Superconductor.- Observation of Landau-Type Branching in the Intermediate State.- Attractive Interaction between Vortices in Type II Superconductors at Arbitrary Temperatures.- Calculation of the Vortex Structure at All Temperatures.- Magnetic Field Distribution in Type II Superconductors by Neutron Diffraction.- Neutron Diffraction Test of Type II Theories in Relation to Temperature.- Nuclear Spin-Spin Relaxation in Superconducting Mixed-State Vanadium.- On the Nature of Flux Transport Noise.- Flux Kinetics Associated with Flux Jumps in Type II Superconductors.- Impurity Effect on the Anisotropy of the Upper Critical Field of Nb-Ta Alloys.- Vortex Transport Interference Transitions.- An Alternating Current Investigation of Pinning Sites.- Effects of Surface Superconductivity in Low Al-Ag Alloys.- A Model for Flux Pinning in Superconductors.- Flux Flow of Pure and Dirty Superconductors.- The Specific Heat of Very Pure Niobium in the Meissner and Mixed States.- Temperature Dependence of Ultrasonic Attenuation in the Mixed State of Pure Niobium.- Mixed-State Ultrasonic Attenuation in Clean Niobium.- The Attenuation of Sound, ql > 1, in Niobium at Low Flux Densities.- Thermal Conduction in the Mixed State of Superconducting Niobium at Low Temperatures.- Entropy of a Type II Superconductor in the Mixed State Close to Tc.- Flux Pinning in Type II Superconductors.- Magnetic Moment in Superconductors Excited by Heat Flow.- Transition to the Mixed State in Lead Films at 4.2°K.- Observation of Tilted Vortices by Microwave Absorption.- Microwave Absorption in Dirty Type II Superconducting Films Around Their Critical Thickness.-Experimental Evidence for the Thompson Term in the Microwave Conductivity of Type II Superconductors.- Dynamic Structure of Vortices in Superconductors: Three-Dimensional Features.- Higher-Order Corrections Due to the Order Parameter to the Flux Flow Conductivity of Dirty Type II Superconductors.- The Nascent Vortex State of Type II Superconductors.- Hall Effect in Type II Superconductors.- Current-Induced Intermediate State in Superconducting Strips of Lead and Indium.- Dissipation in a Superconducting Indium Wire.- Flux Motion in Lead-Indium Wires with Longitudinal Magnetic Fields.- Faraday Induction and Flux Flow Voltages in Type II Superconductors: Effect of Magnetic Field and Temperature.- Investigations of Resonances in the RF Absorption of Superconducting Niobium.- Dynamics of the Destruction of Type I Superconductivity by a Current.- Influence of Thermal Effects on the Kinetics of the Destruction of Superconductivity by a Current.- Fast Neutron Damage in Superconducting Vanadium.- The Effect of an Axial Moment on Normal-Phase Propagation in Type II Superconductors Carrying a Current.- Response of Magnetically Irreversible Type II Cylinders to Currents and Fields Applied in a Parallel Axial Geometry.- Limited Flux Jumps in Hard Superconductors.- Boundary Current and Modulated Flux Motion in Superconducting Thin Pb Films.- Effect of Helical Flow on lc in Cylinders of Type II Superconductors in Axial Magnetic Fields.- Achievement of Nearly Force-Free Flow of Induced Currents in Ribbons of Nb3Sn.- Effect of DC and AC Currents on the Surface Sheath Conductivity of Niobium Single Crystals.- Thermodynamic Properties of Josephson Junction with a Normal Metal Barrier.- Linewidth of Relaxation Oscillations of a Shunted Superconducting Point Contact.- Evidence for theExistence of the Josephson Quasiparticle-Pair Interference Current.- Microwave Emission from Coupled Josephson Junctions.- Application of the Shunted Junction Model to Point-Contact Josephson Junctions.- Characteristics of Josephson Point Contacts at the Center of a Spherical Cavity.- Temperature Dependence of the Riedel Singularity.- Fine Structure in the Anomalous DC Current Singularities of a Josep.

Taschenbuch. Zustand: Neu. Neuware - The purpose of this book is to provide the reader with a survey of some of the major areas of clinical psychology. No attempt has been made to include every area relevant to clinical psychology; the choices are selective but represent the wide range of areas touched by clinical psychologists. For some years I have felt the need for a book that provides students with more of a historical introduction and context from which to view current clinical psychology than is included in most textbooks. The issues and problems of clinical psychology have been with us since the beginning of time; however, most psychological literature is written with the bias that anything older than five or ten years is not relevant. Those who attempt to take a long-range view of clinical psychology are sometimes able to recall the early development of the field in the 1930s and 1940s. In this text, I asked the authors to begin with a brief survey of ancient and medieval history to set the stage for a discussion of current research and developments in the field. I hope that a presentation of this sort will provide the reader-whether advanced undergraduate, graduate, or professional-with a sense of perspective and context from which to view and understand clinical psychology.

Taschenbuch. Zustand: Neu. Neuware - This volume is the scientific chronicle of the NATO Advanced Research Workshop on Computational Aspects of the Study of Biological Macro molecules by Nuclear Magnetic Resonance Spectroscopy, which was held June 3-8, 1990 at Il Ciocco, near Barga, Italy. The use of computers in the study of biological macromolecules by NMR spectroscopy is ubiquitous. The applications are diverse, including data col lection, reduction, and analysis. Furthermore, their use is rapidly evolv ing, driven by the development of new experimental methods in NMR and molecular biology and by phenomenal increases in computational perfor mance available at reasonable cost. Computers no longer merely facilitate, but are now absolutely essential in the study of biological macromolecules by NMR, due to the size and complexity of the data sets that are obtained from modern experiments. The Workshop, and this proceedings volume, provide a snapshot of the uses of computers in the NMR of biomolecules. While by no means exhaustive, the picture that emerges illustrates both the importance and the diversity of their application.