Springer springer feb 2013 (Oltre 1200 risultati)
Lingua: Inglese
Editore: Springer Nature B.V. Feb 2013, 2013
Serie: IFIP Advances in Information and Communication Technology, Libro 81 di 292. Libro 81 di 292 - IFIP Advances in Information and Communication Technology
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Lingua: Inglese
Editore: Springer Nature B.V. Feb 2013, 2013
Serie: The Springer International Series in Engineering and Computer Science, Libro 257 di 260. Libro 257 di 260 - The Springer International Series in Engineering and Computer Science
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Taschenbuch. Condizione: Neu. Neuware - Ultrasonic visualization techniques offer many advantages in regard to the detection of both benign and malignant pathologies of the soft tissue re- gions of the human body. In the past 5 years, there has been a remarkable pro- liferation of commercially available ultrasound instrumentatio…n with the consequence that the medical profession has become increasingly aware of the diagnostic advantages, for detection of cancer, of examination by high-frequency sound waves. Yet, despite the fact that the potential of ultrasound as a diagnostic tool for breast cancer detection was demonstrated in the United States over 20 years ago and, further, despite the high in- cidence of breast cancer in the western world, commercial instrumentation specifically designed for ultrasound scanning of the breast did not evolve in the western world during this same period. The result of this lack of standard clinical instrumentation was that the extensive clinical groundwork normally carried out by large numbers of clinicians in the early stages of applying a new diagnostic tool simply did not occur in the western world for ultrasonic examination of the breast. As indicated by Dr. Toshiji Kobayashi's tables of data in this publica- tion, individual research scientists and physicians in many parts of the world, and in particular in Japan, carried out breast visualization studies with a multiplicity of types of ultrasonic instrumentation.
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Taschenbuch. Condizione: Neu. Neuware - The state of health care is reflected by perinatal and neonatal morbidity and mortality as well as by the frequencies of long-term neurological and developmental disorders. Many factors, some without immediately recognizable significance to childbearing and many still unknown, undoubtedly…contribute beneficially or adversely to the outcome of pregnancy. Knowledge concerning the impact of such factors on the fetus and surviving infant is critical. Confounding analyses of pregnancy outcome, especially these past 2 or 3 decades, are the effects of newly undertaken invasive or inactive therapeutic approaches coupled with the advent of high technology. Many innovations have been introduced without serious efforts to evaluate their impact prospectively and objectively. The consequences of therapeutic misadventures character ized the past; it seems they have been replaced to a degree by some of the complications of applied technology. Examples abound: after overuse of oxygen was recognized to cause retrolental fibroplasia, its restriction led to an increase in both neonatal death rates and neurologic damage in surviving infants. Administration of vitamin K to prevent neonatal hemorrhagic disease, particularly when given in what we now know as excessive dosage, occasionally resulted in kernicterus. Prophy lactic sulfonamide use had a similar end result. More recent is the observation of bronchopulmonary dysplasia as a complication of re spirator therapy for hyaline membrane disease. The decade of the eighties opened with the all-time highest rate of cesarean section in the United States.
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Taschenbuch. Condizione: Neu. Neuware - Engineering has long been thought of by the public as a profession tra ditionally categorized into such branches as electrical, mechanical, chemical, industrial, civil, etc. This classification has served its purpose for the past half century; but the last decade has witnessed a tremendous… change. A continuous transition from the practical to the theoretical has made technology overlap with science, and the enlargement of scope and broad ened diversification have smeared the boundaries between traditional engi neering and scientific fields. Engineering is rapidly becoming a diversified, multidisciplinary field of scientific endeavor. This has prompted us to regard modern engineering as a science, which has as its ingredients materials, energy, and information. In our complex and technologically-oriented society organizations are flooded with an enormous amount of management information. We are now faced with problems concerning the efficient use of communicated knowledge. The steady growth in the magnitude and complexity of informa tion systems necessitates the development of new theories and techniques for solving these information problems. We demand instant access to pre viously recorded information for decision making, and we require new meth ods for analysis, recognition, processing, and display. As a consequence, information science has evolved out of necessity. Concerned with the theoretical basis of the organization, control, stor age, retrieval, processing, and communication of information both by natural and artificial systems, information science is multidisciplinary in character. It covers a vast area of subject matter in the physical and biological sciences.
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Taschenbuch. Condizione: Neu. Neuware - As much by chance as by design, the present volume comes closer to having a single theme than any of our earlier volumes. That theme is the properties of nuclear strength functions or, alternatively, the problem of line spreading. The line spreading or strength function concepts are essent…ial for the nucleus because of its many degrees of freedom. The description of the nucleus is approached by using model wave functions-for example, the shell model or the collective model-in which one has truncated the number of degrees of freedom. The question then is how closely do the model wave functions correspond to the actual nuclear wave functions which enjoy all the degrees of freedom of the nuclear Hamiltonian More precisely, one views the model wave functions as vectors in a Hilbert space and one views the actual wave functions as vectors spanning another, larger Hilbert space. Then the question is: how is a single-model wave function (or vector) spread among the vectors corresponding to the actual wave functions As an example we consider a model state which is a shell-model wave function with a single nucleon added to a closed shell. Such a model state is called a single-particle wave function. At the energy of the single-particle waVe function one of the actual nuclear wave functions may resemble the single-particle wave function closely.
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Taschenbuch. Condizione: Neu. Neuware - Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) \* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Vo…lume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 24 (thesis year 1979) a total of 10,033 theses titles from 26 Canadian and 215 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. While Volume 24 reports these submitted in 1979, on occasion, certain universities do report theses submitted in previous years but not reported at the time.
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Taschenbuch. Condizione: Neu. Neuware - This book is intended as an introductory exposition of those nuclear energy systems concepts which are characterized by an integrated utiliz ation of complementary nuclear processes. Basic to such systems is the notion of synergism, which herein implies the cooperative interaction of selec…ted nuclear reactions and system components so as to provide overall advantages not possible otherwise. While the concept of nuclear energy synergism has in recent years become the focus of an increasing number of conferences, scientific papers, and institutional in-house reports, no text which encompasses the major topics of the subject at a conceptual and analytical level has appeared. It is our aim to present a systematic characterization of these emerging nuclear energy concepts suitable for the senior university student of nuclear science and engineering as well for the active pro fessional involved in nuclear energy systems planning and analysis. In addressing the subject of nuclear energy synergism we have become most conscious of the tension between realism and vision in nuclear energy technology. As developed here, our perception of nuclear energy synergism is firmly rooted in the present and then seeks to proceed toward a heightened degree of compatibility and efficacy based on an enhanced integration of relevant nuclear processes. It is our view that such conceptual considerations must assume a greater role in the emerging techological orientation of nuclear energy systems planning.
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Taschenbuch. Condizione: Neu. Neuware - It has been recognized for more than a thousand years that the function of the brain, like the function of the other organs of the body, is determined by its physical, chemical, and biological properties. Evidence that even its highest functions could be explained by these properties was g…athered only in recent years, however; these findings, which clearly have to be confirmed by a great deal of further experimental evidence, indicate that most, if not all, of the functions of the brain are based on its bio chemical and biophysical mechanisms. This at first hearing may sound rather simple, but the ability to understand learning, emotion, perhaps even creativity, on biological terms may well be the most important scientific discovery of all time. Few pieces of knowledge can influence our future health and well-being to the degree that understanding of mental mechanisms will. It has been clearly shown in many ways in the previous volumes of this Handbook that from the biochemical or neurochemical point of view the brain is one of the most active organs. The brain seems stable and in some respects permanent; this is evidence not of inactivity but of carefully controlled homeostasis, of dynamic rather than static equilibrium, with most components undergoing metabolic alterations.
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Taschenbuch. Condizione: Neu. Neuware - The papers at the General Symposia of the Joint Oceanographic Assembly were presented by authors who had been invited to deal with topics of broad interdisciplinary interest. Together they gave a valuable account of the present state of marine research, its proQlems and potential. There se…ems merit in publishing them in one volume and we are grateful to the authors who kindly agreed to prepare their papers for publication. This has taken some time (and not all authors found it possible) but we hope the resulting volume is still indicative of trends in modern oceanography. Particularly noticeable is the way in which the applied aspects are beginning to play a more important part in spite of worries about the effects of the Law of the Sea on our freedom to make observations. We are especially grateful to the four authors who agreed to give lectures summarising the work in their own field which was reported at the Assembly. We also wish to thank the other authors, as well as all concerned with the Assembly and with the production of this volume.
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Taschenbuch. Condizione: Neu. Neuware - Everyone working in a problem as complex as continental drift, must at some time have feit the need for an objective data summary in fields other than his own. It is a scientific dilemma that, aIthough there is evident need for researchers with competence in many fields (the classical natu…ral scientist), the time in volved in acquiring such broad experience is so great as to ren der the task largely impossible. The alternative seems to be the team approach, and we have espoused it in tbis volume. Editors and contributors alike have tried in this book to keep the accent upon factual information and to reduce interpretation to a minimum. Interpretation there must be, however, since without it science is but an inteHectual pastime comparable to pbilately. The librarian's need to classify results in the appearance of our names upon the spine oftbis volume, however, we would like to make it clear that the book has been a truly cooperative effort and could not have succeeded but for the active help of the individual contributors, whose assistance seldom was re stricted to their chapters. Special thanks must be given to our South American coHeagues, for the tolerance with which they viewed out editorial attempts, and to Dr. E. Machens, for his careful review of the translation of his manu script. We wish also to acknowledge the help of Dr. C. W.
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Taschenbuch. Condizione: Neu. Neuware - Membrane Physiology is a soft-cover book containing portions of Physiology of Membrane Disorders, published in larger, hard-cover form in 1978. The parent volume was divided into five parts, described in detail in the Preface to the hard-cover edition, which is reproduced in this volume. T…he present version of Membrane Physiology incorporates the first three of these parts, including a section on the Nature of Biological Membranes, a section on Methods for Studying Membranes, and a section on General Problems in Membrane Biology. It is the hope of the Editors that this smaller volume will be of value to individuals interested in general physiology, the methods for studying general physiology, and its potential application to problems of clinical and physiological relevance. The Preface to Physiology of Membrane Disorders indicates our general reasoning for developing such a volume. THOMAS E. ANDREOLI JOSEPH F. HOFFMAN DARRELL D. FANESTIL Vll Preface to Physiology of Membrane Disorders The purpose of this book is to provide the reader with a rational frame of reference for assessing the pathophysiology of those disorders in which derangements of membrane transport processes are a major factor responsible for the clinical manifestations of disease.
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Taschenbuch. Condizione: Neu. Neuware - Nobel symposium No. 54 on High Latitude Magnetospheric/Iono spheric Plasma Physics was organized in Kiruna, Sweden on March 22-25, 1982 by Kiruna Geophysical Institute and EISCAT Scientific Association. Some 50 leading experts from Western Europe, America and USSR were invited to the Sympo…sium. One main purpose of the Symposium was to prepare for the intense European research effort in space plasma physics in the middle 1980's, in which the EISCAT facilities and the Swedish satellite Viking are two of the more important constituents. The prograuune of the symposium was tied to the physics of those regions of near space where EISCAT and Viking are expected to pro vide important new observational results. This is rather well covered by the t it Ie of these proceedings: High Lat itude Space Plasma Physics. The first two sessions dealt with the physics of the high latitude ionosphere and the third one with how this part of near space is affected by the properties of the solar wind and the interplanetary magnetic field. The remaining three sessions covered fairly extensively the high latitude magnetospheric physics at altitudes of 1-2 earth radii, which is the main scien tific object of the Viking project. The Prograuune COllDlittee of the Kiruna Nobel Symposium was composed of the following European scientists: P. Bauer (Issy-les-Moulineaux), R. Bostrom (Uppsala), C. G. FalthallDlar (Stockholm), T. Hagfors (Kiruna, Cochairman), o. Holt (Troms,s), B. Hultqvist (Kiruna, Cochairman), H. Kohl (Lindau), J. Oksman (Oulu), H. Rishbeth (Chilton), and L. Stenflo (Ume!).
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Taschenbuch. Condizione: Neu. Neuware - The purpose of the World Psychiatric Association is to coordinate the activities of its Member Societies on a world-wide scale and to advance enquiry into the etiology, pathology, and treatment of mental illness. To further this purpose, the Association organizes mono- or multithematic Reg…ional Symposia in different parts of the world twice a year, and World Congresses dealing with all individual fields of psychiatry once every five or six years. Between these meetings the continuation of the Association's scientific work is assured through the activities of its specialty sections, each covering an important field of psychiatry. The programs of the World Congresses reflect on the one hand the intention to present the coordinating functions of the Association and on the other to open a broad platform for a free exchange of views. Thus, the VII World Congress of Psychiatry, held in Vienna from July 11 to 16, 1983, was composed of two types of scientific events - those structured by the Association and those left to the initiative of the participants. The first type comprised Plenary Sessions, planned by the Scientific Program Committee, and Section Symposia, organized by the WPA sections; the second embraced Free Symposia, free papers, video sessions, and poster presentations prepared by the participants. Altogether, 10 Plenary Sessions, 52 Section Symposia, and 105 Free Symposia took place, and 78 free papers and poster sessions and 10 video sessions were held.
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Taschenbuch. Condizione: Neu. Neuware - The NATO Advanced Study Institute held in the Hotel Metropole Llandrindod Wells, Powys, Wales from July 26th to August 4th 1981 provided an excellent platform for presentation and appraisal of our current knowledge of neurotransmitter systems. The proceed ings comprise the present volume a…nd these were arranged to allow study of the pathways and the interactions of specific transmitter systems, one with another, in the various sub-regions of the central nervous system. In addition several of the key factors involved in neurotransmitter release were highlighted. These include the structural and molecular organisation of the nerve terminal, its organelles (such as vesicles, neurotubules and synaptic densities) and the mechanisms involved in neurotransmitter release including the participation of calcium. The organisation of transmitter synthesis, storage and transport were discussed together with their linkage to other streams of metabolism, and the cellular compartmentation of these processes. In addition to the principal lectures given at the Institute, many part1c1pants presented short reports for discussion and these are all included in this volume. The success of the Study Institute was due to the careful planning of the scientific programme to allow a smooth flow and integration of the topics included and this is reflected in the organisation of this book. The programme committee members were, R. Balazs (London), H. F. Bradford (London,Director), J. B. Clark (London), J. E. Cremer (MRC, Carshalton), J. S. Kelly (London), L. Lim (London), M. J. Neal (London) and P. J. Roberts (Southampton).
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Taschenbuch. Condizione: Neu. Neuware - A color time-varying image can be described as a three-dimensional vector (representing the colors in an appropriate color space) defined on a three-dimensional spatiotemporal space. In conventional analog television a one-dimensional signal suitable for transmission over a communication c…hannel is obtained by sampling the scene in the vertical and tem poral directions and by frequency-multiplexing the luminance and chrominance informa tion. In digital processing and transmission systems, sampling is applied in the horizontal direction, too, on a signal which has been already scanned in the vertical and temporal directions or directly in three dimensions when using some solid-state sensor. As a conse quence, in recent years it has been considered quite natural to assess the potential advan tages arising from an entire multidimensional approach to the processing of video signals. As a simple but significant example, a composite color video signal, such as the conven tional PAL or NTSC signal, possesses a three-dimensional spectrum which, by using suitable three-dimensional filters, permits horizontal sampling at a rate which is less than that re quired for correctly sampling the equivalent one-dimensional signal. More recently it has been widely recognized that the improvement of the picture quality in current and advanced television systems requires well-chosen signal processing algorithms which are multidimen sional in nature within the demanding constraints of a real-time implementation.
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Taschenbuch. Condizione: Neu. Neuware - IWPTS'95 (International Workshop on Protocol Test Systems) is being held this year at !NT (Institut National des Telecommunications), Evry, France, from 4 to 6 September, 1995. IWPTS'95 is the eighth of a series of annual meetings sponsored by the IFIP Working Group WG6.1 dedicated to 'Arc…hitecture and Protocols for Computer Networks'. The seven previous workshops were held in Vancouver (Canada, 1988), Berlin (Germany, 1989), Mclean (USA, 1990), Leidschendam (The Netherlands, 1991), Montreal (Canada, 1992), Pau (France, 1993) and Tokyo (Japan, 1994). The workshop is a meeting place where both research and industry, theory and practice come together. By bringing both researchers and practitioners together, IWPTS opens up the communication between these groups. This helps keep the research vital and improves the state of the practitioner's art. Forty-eight papers have been submitted to IWPTS'95 and all of them have been reviewed by the members of the Program Committee and additional reviewers. The completed reviewers list is included in this Proceedings. Based on these reviews, the Program Committee selected 26 for oral presentation and 4 to be presented as posters. Two specially invited papers complete the Workshop Program, which is composed of ten sessions: Testing Methods (Session 1), Test Environments (Session 2), Theoretical Framework (Session 3), Algorithms and Languages (Session 4), Test Generation 1 (Session 5), Testability (Session 6), Test Generation 2 (Session 7), Industrial Applications (Session 8), Distributed Testing and performance (Session 9) and Test Management (Session 10).
