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Buch. Zustand: Neu. Neuware -Communication and concurrency are essential in understanding complex dynamic systems, and there have been many theories to deal with them such as Petri nets, CSP and ACP. Among them, CCS (process calculus is one of the most important and mathematically developed models of communication and concurrency. Various behavior equivalences between agents, such as (strong and weak) bisimilarity, observation congruence, trace equivalence, testing equivalence and failure equivalence, are central notions in process calculus. In the real applications of process calculus, specification and implementation are described as two agents, correctness of programs is treated as a certain behavior equivalence between specification and implementation, and then the proof of correctness of programs is a task to establish some behavior equivalence between them. The goal of this book is to provide some suitable and useful concepts and tools for the understanding and analysis of approximate correctness of programs in concurrent systems. Throughout this book the focus is on the framework of process calculus, and the main idea is to construct some natural and reasonable topological structures which can reveal suitably a mechanism of approximate computation in process calculus and to work out various relationships among processes which are compatible with these topological structures.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 232 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Ecosystem management requires a planning and decision-making process that places land use in its appropriate ecological context. Because ecological assessments must be conducted at various spatial scales and across jurisdictional boundaries, approaches to assessment must be compatible and consistent with each other. A Guidebook for Integrated Ecological Assessment analyzes methods and provides standards and protocols for assessment and the integration of data. 556 pp. Englisch.

Buch. Zustand: Neu. Neuware -This book is devoted to the study of the acoustic wave equation and of the Maxwell system, the two most common wave equations encountered in physics or in engineering. The main goal is to present a detailed analysis of their mathematical and physical properties. Wave equations are time dependent. However, use of the Fourier trans form reduces their study to that of harmonic systems: the harmonic Helmholtz equation, in the case of the acoustic equation, or the har monic Maxwell system. This book concentrates on the study of these harmonic problems, which are a first step toward the study of more general time-dependent problems. In each case, we give a mathematical setting that allows us to prove existence and uniqueness theorems. We have systematically chosen the use of variational formulations related to considerations of physical energy. We study the integral representations of the solutions. These representa tions yield several integral equations. We analyze their essential properties. We introduce variational formulations for these integral equations, which are the basis of most numerical approximations. Different parts of this book were taught for at least ten years by the author at the post-graduate level at Ecole Poly technique and the University of Paris 6, to students in applied mathematics. The actual presentation has been tested on them. I wish to thank them for their active and constructive participation, which has been extremely useful, and I apologize for forcing them to learn some geometry of surfaces.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 332 pp. Englisch.

Buch. Zustand: Neu. Neuware -Nonsmoothness and nonconvexity arise in numerous applications of mechan ics and modeling due to the need for studying more and more complicated phe nomena and real life applications. Mathematicians have started to provide the necessary tools and theoretical results underpinning these applications. Ap plied mathematicians and engineers have begun to realize the benefits of this new area and are adopting, increasingly, these new tools in their work. New computational tools facilitate numerical applications and enable the theory to be tested, and the resulting feedback poses new theoretical questions. Because of the upsurge in activity in the area of nonsmooth and noncon vex mechanics, Professors Gao and Ogden, together with the late Professor P.D. Panagiotopoulos, had planned to organize a Minisymposium with the title Nonsmooth and Nonconvex Mechanics within the ASME 1999 Mechanics & Materials Conference, June 27-30 1999, Blacksburg, Virginia. After the unex pected death of Professor Panagiotopoulos the first two editors invited the third editor (Professor Stavroulakis) to join them. A large number of mathematical and engineering colleagues supported our efforts by presenting lectures at the Minisymposium in which the available mathematical methods were described and many problems of nonsmooth and nonconvex mechanics were discussed. The interest of the many participants encourages us all to continue our research efforts.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 524 pp. Englisch.

Buch. Zustand: Neu. Neuware -This volume explores abduction (inference to explanatory hypotheses), an important but neglected topic in scientific reasoning. My aim is to inte grate philosophical, cognitive, and computational issues, while also discuss ing some cases of reasoning in science and medicine. The main thesis is that abduction is a significant kind of scientific reasoning, helpful in delineating the first principles of a new theory of science. The status of abduction is very controversial. When dealing with abduc tive reasoning misinterpretations and equivocations are common. What are the differences between abduction and induction What are the differences between abduction and the well-known hypothetico-deductive method What did Peirce mean when he considered abduction a kind of inference Does abduction involve only the generation of hypotheses or their evaluation too Are the criteria for the best explanation in abductive reasoning epis temic, or pragmatic, or both How many kinds of abduction are there The book aims to increase knowledge about creative and expert infer ences. The study of these high-level methods of abductive reasoning is situ ated at the crossroads of philosophy, epistemology, artificial intel1igence, cognitive psychology, and logic; that is, at the heart of cognitive science. Philosophers of science in the twentieth century have traditionally distin guished between the inferential processes active in the logic of discovery and the ones active in logic of justification.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 228 pp. Englisch.

Buch. Zustand: Neu. Neuware - 'Morten: And what are we going to do, when you have made liberal-minded and high-minded men of us Dr. Stockman: Then you shall drive all the wolves out of the country, my boys!' (Ibsen, An Enemy of the People, Act V) The theoretical and empirical research of this book describes how the traditional safeguards of the rights of minority shareholders have failed in their duty and how those shareholders have remained practically without any protection against the arbitrariness of the companies and majority shareholders. The law, the SEC, society, boards of directors, independent directors, auditors, analysts, underwriters and the press have remained in many cases worthless panaceas. Nevertheless, in the Ethics of 2000 new vehicles have been developed for the protection of minority shareholders, mainly the Internet, transparency, activist associations and ethical funds. Those vehicles give the shareholders at least the chance to understand the pattern and methods that are utilized to wrong them and give them a viable alternative for investment in ethical funds. The new vehicles will prevent minority shareholders from using the Armageddon weapon, by ceasing to invest in the stock exchange and causing the collapse of the system, that discriminates against them.

Buch. Zustand: Neu. Neuware -Gauss created the theory of binary quadratic forms in 'Disquisitiones Arithmeticae' and Kummer invented ideals and the theory of cyclotomic fields in his attempt to prove Fermat's Last Theorem. These were the starting points for the theory of algebraic numbers, developed in the classical papers of Dedekind, Dirichlet, Eisenstein, Hermite and many others. This theory, enriched with more recent contributions, is of basic importance in the study of diophantine equations and arithmetic algebraic geometry, including methods in cryptography. This book has a clear and thorough exposition of the classical theory of algebraic numbers, and contains a large number of exercises as well as worked out numerical examples. The Introduction is a recapitulation of results about principal ideal domains, unique factorization domains and commutative fields. Part One is devoted to residue classes and quadratic residues. In Part Two one finds the study of algebraic integers, ideals, units, class numbers, the theory of decomposition, inertia and ramification of ideals. Part Three is devoted to Kummer's theory of cyclomatic fields, and includes Bernoulli numbers and the proof of Fermat's Last Theorem for regular prime exponents. Finally, in Part Four, the emphasis is on analytical methods and it includes Dinchlet's Theorem on primes in arithmetic progressions, the theorem of Chebotarev and class number formulas. A careful study of this book will provide a solid background to the learning of more recent topics.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 712 pp. Englisch.

Buch. Zustand: Neu. Neuware -Due to the developments in the role of governments, the importance of government accounting and financial reporting is increasing. This led to changes in Government Accounting all over the world. For institutional, public finance and other reasons this has not always been done for central governments and regional and local governments in the same way. Some countries maintain the cash basis, some changed over to the accrual basis. Many of them started at first with lower government levels, only few changed over completely.Comparative Issues in Government and Accounting aims to give insight in the array of different patterns the world shows with respect to government accounting and financial reporting. Of course a complete overview would have been too ambitious a goal. This book brings together an interesting number of academics coming from a representative number of countries to get an impression of the situation and especially of the existence and the backgrounds of similarities and differences.Thirty-five authors and co-authors produced 21 chapters reflecting on the situations in 16 countries on 4 continents. Countries dealt with are Albania, Australia, Belgium, China, Egypt, Finland, France, Japan, The Netherlands, New Zealand, Norway, Poland, Russia, Spain, the United Kingdom and the United States.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 380 pp. Englisch.

Buch. Zustand: Neu. Neuware -Nonlinear Control Systems and Power System Dynamics presents a comprehensive description of nonlinear control of electric power systems using nonlinear control theory, which is developed by the differential geometric approach and nonlinear robust control method. This book explains in detail the concepts, theorems and algorithms in nonlinear control theory, illustrated by step-by-step examples. In addition, all the mathematical formulation involved in deriving the nonlinear control laws of power systems are sufficiently presented. Considerations and cautions involved in applying nonlinear control theory to practical engineering control designs are discussed and special attention is given to the implementation of nonlinear control laws using microprocessors.Nonlinear Control Systems and Power System Dynamics serves as a text for advanced level courses and is an excellent reference for engineers and researchers who are interested in the application of modern nonlinear control theory to practical engineering control designs.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 404 pp. Englisch.

Buch. Zustand: Neu. Neuware -Early Thoughts on Creating Comprehensive Trauma Centers This volume has been many years in writing. When Dr. Donald Meichenbaum first suggested it and I approached my coauthor Lasse Nurmi, it did not seem to be as formidable a task as it has become. Interviewing the centers in this book has taken years-to get responses, to summarize those responses, and to return the summaries for further comment. Many centers have been created in that time; others have suspended operation. This volume does not claim to present even a majority of those centers. However, the ones contained herein are representative of 'what is out there. ' The idea to create a comprehensive trauma center is not new. The initial section of this forward examines thoughts I proposed as part of my compre hensive examination for my doctorate. Many of the ideas proposed then (1989) seem to fit now. It is my dream to put them into practice someday in the future. THE COMPREHENSIVE EXAMINATION QUESTION In 1989, one question on the written comprehensive examination ques tions for my doctorate was, 'If you were to create a comprehensive trauma center in your suburban area, making use of what you have learned in your [doctoral] experience, describe the organization of that center, the mission, structure, personnel, funding, objectives, and services it would offer. ' Some of the conclusions reached then now seem applicable to the task at hand: design ing comprehensive trauma centers (CTCs) for the 21st century.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 476 pp. Englisch.

Buch. Zustand: Neu. Neuware -Estimating abundance of wildlife is an essential component of a wildlife research program, and a prerequisite for sound management. With the exception of a few highly mathematical volumes, there are no books on the subject for use by students and field workers. Also, the various techniques for counting animals found in scientific journals are often not accessible to African managers. The unavailability of the diverse literature necessitated the production of a textbook or field manual that covers the ground. The book compiles the most relevant techniques for counting African mammals, illustrated with many examples from the field. It provides guidelines for selecting the appropriate methodology for a range of conditions commonly found in the field, in terms of different animal species, habitat types, and management objectives.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 316 pp. Englisch.

Buch. Zustand: Neu. Neuware -This volume is comprised of the majority of lecture presentations and a few select posters presented at the International Workshop, 'Basal Ganglia and Thalamus in Health and Movement Disorders,' held in Moscow, Russia, on May 29-31, 2000. The International Committee responsible for organizing this workshop included Alexander Konovalov, Director, Burdenko Institute of Neurosurgery of the Russian Academy of Medical Sciences, Mahlon DeLong, Chair, Department of Neurology, Emory University, Atlanta, USA, Alim Louis Benabid, Chief, Neurosurgery Service, University of Joseph Fourrier, Grenoble, France, and the two undersigned. The workshop was conceived out of a desire to provide a forum for discussions of both basal ganglia-and motor thalamus-related issues by bringing together basic scientists and clinicians representing different disciplines, research directions, and philosophies. The primary goals were to encourage an exchange of information and ideas in an informal environment, to stimulate integration of the data from different disciplines, and to identifY controversial issues and the most essential questions to be addressed in future research.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 400 pp. Englisch.

Buch. Zustand: Neu. Neuware -Neuropsychologists have an important role in potentiating the psychosocial adjustment and quality of life of patients through effective diagnosis and rehabilitation of cognitive and psychomotor deficits caused by acute and chronic disease.Thoroughly updated and expanded, this second edition of the highly acclaimed Medical Neuropsychology contains a complete review of the rapidly developing literature pertaining to the association between cognition and medical diseases.As a compendium of the empirical literature documenting the neuropsychological sequelae of organ and system pathology, this volume will be of interest of all practitioners interested in the integration of neuropsychology into the mainstream of health service delivery.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 364 pp. Englisch.

Buch. Zustand: Neu. Neuware -This book reflects the work of wine marketing experts as expressed in their presentations to the annual three-week Wine Marketing Short Course at the University of California, Davis. The course was initially organized in collaboration with the international wine management curriculum sponsored by the International Organization for Vines and Wines (OIV). We have been involved in this course since its inception a decade ago. This book is intended for students in wine marketing and management, enology, and viticulture who seek to broaden their understanding of the wine sector. It is also intended for those already working in wine market ing and management who seek new ideas and insights. Finally, this book should be of general interest to others involved directly or indirectly in the grape and wine sector. Each chapter was written from the oral presentations of the authors and reflects the spontaneity and informality of the classroom environment. The writing may lack the 'gravitas' of academic material, but it accurately presents the thinking and conclusions of those who make a living by mar keting wine. There is some duplication that serves to emphasize important points, and there are several case studies explaining real-life experiences in the industry. Legal requirements and commercial practices cited by authors may differ between regions and among institutions familiar to readers. However, the underlying principles guiding marketing strategies can be applied in different situations, for example, where supermarket wine sales may be restricted or direct sales prohibited.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 332 pp. Englisch.

Buch. Zustand: Neu. Neuware -Diffusing Software Product and Process Innovations addresses the problems and issues surrounding successful diffusion of innovations in software. Everett Rogers' classic text, Diffusion of Innovations, provides a valuable framework for evaluating and applying technology transfer methods. In today's new economy, the most important innovations may well be new software products and processes.Topics covered in this valuable new book include: Implementation and coordination issues;New interpretations of diffusion theory;Diffusion of software processes;Contextual factors;Communication of information;Experience reports.This volume contains the edited proceedings of the Fourth Working Conference on Diffusing Software Product and Process Innovations, which was sponsored by the International Federation for Information Processing (IFIP) Working Group 8.6, and held in Banff, Canada in April 2001. It reflects the latest experiences of practitioners and theories of academics in this fast-changing field.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 320 pp. Englisch.

Buch. Zustand: Neu. Neuware -Selective Oxidation by Heterogeneous Catalysis covers one of the major areas of industrial petrochemical production, outlining open questions and new opportunities. It gives keys for the interpretation and analysis of data and design of new catalysts and reactions, and provides guidelines for future research.A distinctive feature of this book is the use of concept by example. Rather than reporting an overview of the literature results, the authors have selected some representative examples, the in-depth analysis of which makes it possible to clarify the fundamental, but new concepts necessary for a better understanding of the new opportunities in this field and the design of new catalysts or catalytic reactions. Attention is given not only to the catalyst itself, but also to the use of the catalyst inside the process, thus evidencing the relationship between catalyst design and engineering aspects of the process.This book provides suggestions for new innovative directions of research and indications on how to reconsider the field of selective oxidation from different perspectives, outlining that is not a mature field of research, but that new important breakthroughs can be derived from fundamental and applied research. Suggestions are offered on how to use less conventional approaches in terms of both catalyst design and analysis of the data.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 524 pp. Englisch.

Buch. Zustand: Neu. Neuware -In 1997 the National Institute of Mental Health assembled a working group of international experts to address the mental health consequences of torture and related violence and trauma; report on the status of scientific knowledge; and include research recommendations with implications for treatment, services, and policy development. This book, dedicated to those who experience the horrors of torture and those who work to end it, is based on that report.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 404 pp. Englisch.

Buch. Zustand: Neu. Neuware -In the food industry, controlling crystallization is a key factor in quality as it relates to texture, with some foods requiring the promotion of crystallization and others its prevention. In the first publication to focus specifically on this process as it applies to food, Crystallization in Foods covers fundamental principles in ice, sugar, and lipid crystallization, and their applications. Drawing on examples throughout of the practical use and impact of crystallization on food structure, texture, and quality; and enhanced with numerous equations and illustrations, Crystallization in Foods is a valuable resource for food engineers and other scientists working with crystallization in foods, particularly in the dairy, confectionery, frozen foods, and baked goods industries. In addition, this book may be of interest to scientists and other professionals in the personal care and cosmetics industry, which shares some of the same quality and texture concerns as the food industry.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 336 pp. Englisch.

Buch. Zustand: Neu. Neuware -Introductory texts on psychological testing and evaluation historically are not in short supply. Typically, however, such texts have been relatively superficial in their discussion of clinical material and have focused primarily on the theoretical and psychometric properties of indi vidual tests. More practical, clinically relevant presentations of psychological instruments have been confined to individual volumes with advanced and often very technical information geared to the more sophisticated user. Professors in introductory graduate courses are often forced to adopt several advanced texts to cover the material, at the same time helping students wade through unnecessary technical information in order to provide a basic working knowl edge of each test. Understanding Psychological Assessment is an attempt to address these concerns. It brings together into a single volume a broad sampling of the most respected instruments in the psychologist's armamentarium along with promising new tests of cognitive, vocational, and personality functioning. Additionally, it presents the most updated versions of these tests, all in a practical, clearly written format that covers the development, psychometrics, administra tive considerations, and interpretive hypotheses for each instrument. Clinical case studies allow the reader to apply the interpretive guidelines to real clinical data, thereby reinforcing basic understanding of the instrument and helping to insure that both the student and practi tioner can actually begin to use the test. Understanding Psychological Assessment includes cognitive and personality tests for adults, children, and adolescents, as well as chapters on the theory of psychological measurement and integrated report writing.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 396 pp. Englisch.

Buch. Zustand: Neu. Neuware - Design automation of electronic and hybrid systems is a steadily growing field of interest and a permanent challenge for researchers in Electronics, Computer Engineering and Computer Science. System Design Automation presents some recent results in design automation of different types of electronic and mechatronic systems. It deals with various topics of design automation, ranging from high level digital system synthesis, through analogue and heterogeneous system analysis and design, up to system modeling and simulation. Design automation is treated from the aspects of its theoretical fundamentals, its basic approach and its methods and tools. Several application cases are presented in detail. The book consists of three chapters: High-Level System Synthesis (Digital Hardware/Software Systems). Here embedded systems, distributed systems and processor arrays as well as hardware-software codesign are treated. Also three special application cases are discussed in detail; Analog and Heterogeneous System Design (System Approach and Methodology). This chapter copes with the analysis and design of hybrid systems comprised of analog and digital, electronic and mechanical components; System Simulation and Evaluation (Methods and Tools). In this chapter object-oriented Modelling, analog system simulation including fault-simulation, parameter optimization and system validation are regarded. The contents of the book are based on material presented at the Workshop System Design Automation (SDA 2000) organised by the Sonderforschungsbereich 358 of the Deutsche Forschungsgemeinschaft at TU Dresden.

Buch. Zustand: Neu. Neuware -From 1976 to the beginning of the millennium¿covering the quarter-century life span of this book and its predecessor¿something remarkable has happened to market response research: it has become practice. Academics who teach in professional fields, like we do, dream of such things. Imagine the satisfaction of knowing that your work has been incorporated into the decision-making routine of brand managers, that category management relies on techniques you developed, that marketing management believes in something you struggled to establish in their minds. It¿s not just us that we are talking about. This pride must be shared by all of the researchers who pioneered the simple concept that the determinants of sales could be found if someone just looked for them. Of course, economists had always studied demand. But the project of extending demand analysis would fall to marketing researchers, now called marketing scientists for good reason, who saw that in reality the marketing mix was more than price; it was advertising, sales force effort, distribution, promotion, and every other decision variable that potentially affected sales. The bibliography of this book supports the notion that the academic research in marketing led the way. The journey was difficult, sometimes halting, but ultimately market response research advanced and then insinuated itself into the fabric of modern management.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 520 pp. Englisch.

Buch. Zustand: Neu. Neuware - This volume contains many of the papers presented at the conference 'Optimum Design 2000: Prospects for the New Millennium' held in Cardiff, UK on April 12th - 14th, 2000. The majority of the papers consider aspects of optimum experimental design from the theoretical to applications. Many of the optimisation problems arising in the optimum design theory in general and the articles in this volume in particular, fall into the category of nonconvex, including global, optimization. The papers are organised in two sections. Since we are at the beginning of a new millennium the first paper starts by looking back at the beginnings of optimum exper imental design in 1917 and sketches the development up to Kiefer's paper read to the Royal Statistical Society in 1959. This is the first in a group of papers which we have labelled 'Theory', which cover the more general aspects, such as the properties and methods of construction of designs. In the 'Applications' section there are papers on sequential design problems arising in the pharmaceutical industry and on the designs with discrete factors which occur in agriculture. There are also papers on training neural networks, on the efficient design of sampling methods, on design problems in mixtures, arising from a study of glass manufacturing, and on the resistance of Brazilian weeds to herbicides. The number attending the meeting was deliberately limited to 50 in order to encour age a workshop atmosphere and the exchange of ideas.

Taschenbuch. Zustand: Neu. Neuware - This handbook contains up-to-date existing structures, computer applications, and infonnation on planning, analysis, and design seismic design of wood structures. A new and very useful feature of this edition of earthquake-resistant building structures. Its intention is to provide engineers, architects, is the inclusion of a companion CD-ROM disc developers, and students of structural containing the complete digital version of the handbook itself and the following very engineering and architecture with authoritative, yet practical, design infonnation. It represents important publications: an attempt to bridge the persisting gap between l. UBC-IBC (1997-2000) Structural advances in the theories and concepts of Comparisons and Cross References, ICBO, earthquake-resistant design and their 2000. implementation in seismic design practice. 2. NEHRP Guidelines for the Seismic The distinguished panel of contributors is Rehabilitation of Buildings, FEMA-273, Federal Emergency Management Agency,composed of 22 experts from industry and universities, recognized for their knowledge and 1997. extensive practical experience in their fields. 3. NEHRP Commentary on the Guidelinesfor They have aimed to present clearly and the Seismic Rehabilitation of Buildings, FEMA-274, Federal Emergency concisely the basic principles and procedures pertinent to each subject and to illustrate with Management Agency, 1997. practical examples the application of these 4. NEHRP Recommended Provisions for principles and procedures in seismic design Seismic Regulations for New Buildings and practice. Where applicable, the provisions of Older Structures, Part 1 - Provisions, various seismic design standards such as mc FEMA-302, Federal Emergency 2000, UBC-97, FEMA-273/274 and ATC-40 Management Agency, 1997.

Buch. Zustand: Neu. Neuware - At the beginning of the twentieth century, engineers and technologists would have recognized the importance of adhesion in two main aspects: First, in the display of friction between surfaces - at the time a topic of growing importance to engineers; the second in crafts requiring the joining of materials - principally wood-to form engineering structures. While physical scientists would have admitted the adhesive properties of glues, gels, and certain pastes, they regarded them as materials of uncertain formulation, too impure to be amenable to precise experiment. Biological scientists were aware also of adhesive phenomena, but the science was supported by documentation rather than understanding. By the end of the century, adhesion and adhesives were playing a crucial and deliberate role in the formulation of materials, in the design and manufacture of engineering structures without weakening rivets or pins, and in the use of thin sections and intricate shapes. Miniaturization down to the micro- and now to the nano-level of mechanical, electrical, electronic, and optical devices relied heavily on the understanding and the technology of adhesion. For most of the century, physical scientists were aware that the states of matter, whether gas, liquid, or solid, were determined by the competition between thermal energy and int- molecular binding forces. Then the solid state had to be differentiated into crystals, amorphous glasses, metals, etc. , so the importance of the molecular attractions in determining stiffness and strength became clearer.