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Monograph( based very largely upon results original to the Czechoslovakian authors) presents an abstract account of the theory of automata for sophisticated readers presumed to be already conversant in the language of category theory. The seven chapters are punctuated at frequent intervals by exampl

Ulcerative colitis and Crohn's disease remain a great therapeutic challenge to the medical community. In recent years knowledge about the pathogenesis of these diseases has progressed rapidly but the cause of the diseases remains completely unknown. It has become clear that dysregulation of the mucosal immune system is the basis for the chronic evolution of the diseases in a genetically susceptible population. Exciting new therapeutic approaches have been attempted in the last couple of years and cytokine and anti-cytokine treatments in particular seem very promising, especially in intractable disease. The format of the Falk Symposium 106 on `Advances in Inflammatory Bowel Diseases', held in Brussels, Belgium, June 18-20, 1998, was somewhat innovative as each session attempted to link the new insights into pathogenetic mechanisms with new therapeutic approaches, resulting in optimal information transfer. The classic therapeutic schemes were updated with a special focus on step-wise build-up of therapy.

In this book a general topological construction of extension is proposed for problems of attainability in topological spaces under perturbation of a system of constraints. This construction is realized in a special class of generalized elements defined as finitely additive measures. A version of the method of programmed iterations is constructed. This version realizes multi-valued control quasistrategies, which guarantees the solution of the control problem that consists in guidance to a given set under observation of phase constraints.Audience: The book will be of interest to researchers, and graduate students in the field of optimal control, mathematical systems theory, measure and integration, functional analysis, and general topology.

This book, the proceedings of Falk Symposium No. 125 on 'Cytokines in Liver Injury and Repair' (Progress in Gastroenterology and Hepatology Part II), held in Hannover, Germany, on September 30 - October 1, 2001, provides an update of our current knowledge on the role of cytokines in various human and experimental liver diseases and on their present and prospective use in therapeutic trials. The book contains chapters by most well-known experts in the field who have contributed significantly to our present knowledge on cytokines in liver injury and repair.

The death of Jaroslav Hajek on June 10, 1974 was a heavy loss to many mathe­ maticians all around the world. The impact of his work on mathematical statistics has been so extraordinary that it has completely changed the character of some fields of this science. Some of his ideas have become a part of the common statistical conSClOusness. Hajek's contribution to statistics includes research in the theory of rank tests, parametric estimation, probability sampling, statistical inference in stochastic processes and various other specializations. His results were always of fundamental character for the corresponding field and they continue to stimulate further research and progress. For proving the results, he developed original methods which are now commonly used for the solution of many related problems. Hajek was an enthusiastic mathematician; the secret of his success was in his love for the subject and in his great sense for practical applications; just practical problems provided him the source of excellent mathematical problems and ideas. We see the best way of commemorating Jaroslav Hajek in the arrangement of the present volume which collects papers of authors whose work is related to Hajek's work and who were friends of him. The authors come from Czechoslovakia, Hungary. the Netherlands, Sweden, U.S.A .. U.S.S.R., and West Germany. I wish to thank most cordially all the authors and all who contributed in any way to the success of the publication.

This book contains 71 papers presented at the symposium on "Recent Advances in Experimental Mechanics" which was organized in honor of Professor Isaac M. Daniel. The symposium took place at Virginia Polytechnic Institute and State University on th June 23-28, 2002, in conjunction with the 14 US National Congress of Applied Mechanics. The book is a tribute to Isaac Daniel, a pioneer of experimental mechanics and composite materials, in recognition of his continuous, original, diversified and outstanding contributions for half a century. The book consists of invited papers written by leading experts in the field. It contains original contributions concerning the latest developments in experimental mechanics. It covers a wide range of subjects, including optical methods of stress analysis (photoelasticity, moiré, etc.), composite materials, sandwich construction, fracture mechanics, fatigue and damage, nondestructive evaluation, dynamic problems, fiber optic sensors, speckle metrology, digital image processing, nanotechnology, neutron diffraction and synchrotron radiation methods. The papers are arranged in the following nine sections: Mechanical characterization of material behavior, composite materials, fracture and fatigue, optical methods, n- destructive evaluation, neutron diffraction and synchrotron radiation methods, hybrid methods, composite structures, and structural testing and analysis.

Parenteral nutrition has been one of the most significant therapeutic advances of the past twenty years. Many patients have survived very serious illness only because of intravenous nutrition for either short or very long periods of time. The indications for parenteral nutrition are simple and can be summarised as the inability to ingest necessary nutrients for a significant time during increased metabolic demands. Many problems in the preparation of energy sources and amino acid solutions have been solved so that the time is opportune to review what has been achieved and discuss recent advances and current thinking in the light of future requirements. The next phase in parenteral nutrition will undoubtedly be the provision of regimens designed for specific situations. The needs of the neonate for example are known to differ from adult requirements. The choice of carbohydrate for intravenous use has been a matter of much of glucose both in biochemical and clinical terms discussion. The supremacy now seems well established. The value of intravenous fat is well documented, but the interchange of fat and carbohydrate as calorie sources and the effects of prolonged infusions of fat merit further investigation. The evidence that isotonic amino acids are utilized effectively when given alone due to the availability of endogenous energy sources has led to a greater understanding of the metabolic changes and demands associated with injury and sepsis.

Understanding the biogeography of Australia requires knowledge of both existing and former environments. The existing environment is discussed elsewhere in the volume but a few salient points should be reiterated. Three-quarters of Australia is either arid or semi-arid and even much of the better-watered fringes has long dry seasons. Vast stretches of ocean separate it from other land masses except in the north where New Guinea and Indonesia form 'stepping stones' to and from Asia. It is also a low continent with over 99% of its area below 1000 m; even the highest summits barely exceed 2000 m. Since most of the surface has undergone prolonged weath­ ering, poor soils are the rule. The impact of man on the landscape has been less than in more densely settled continents. Aboriginal man has inhabited the continent for 40,000 years or more but agriculture and stock rearing have operated for less than two centuries and the present rural population is sparse. Large parts of the dry interior are not occupied although they are affected to some extent by introduced feral animals.

Originally presented as the author's thesis (doctoral--Technical University of Denmark).

"Fundamental Astronomy and Solar System Dynamics", a program of invited papers honoring Professor Walter Fricke, who for thirty years has been Director of the Astronomisches Rechen lnstitut in Heidelberg, was held at the Thompson Conference Center of the University of Texas at Austin on Wednesday 27 March 1985 on the occasion of his seventieth birthday and retirement as Director of ARl. Professor Fricke's contributions to astronomy encompass the areas of galactic dynamics, radial velocities, stellar statistics. the fundamental reference system and the constant of precession. Participants were welcomed to the Uni versi ty of Texas by Professor J. Parker Lamb, Chairman of the Department of Aerospace Engineering and Engineering Mechanics. The presentations ranged from discussions of astrometric problems concerned with the reference system, the constant of precession, major and minor planet observations, planetary ephemerides and lunar and satellite laser ranging, to a study of disc galaxies in massive halos. The program concluded with a review of Professor Fricke's career. The three sessions were chaired by Victor G. Szebehely, Carol A. Williams and Jay H. Lieske. The participants in this meeting, and in the Division on Dynamical Astronomy meeting that followed, were happy that Professor Fricke was able to attend. His presence at these meetings, as well as his thoughtful comments, were greatly appreciated. We are pleased to acknowledge the support of the Center for Space Research, the Department of Astronomy and the Department of Aerospace Engineering and Engineering Mechanics of the University of Texas at Austin.

Among the subjects covered in this volume are the topological effects of quantum mechanics, including Bohm-Aharonov and Aharonov-Casher effects and their generalisations; the toroidal moments, anapoles and their generalisations; the numerical investigation of Tonomura experiments testing the foundations of quantum mechanics; the time-dependent Bohm-Aharonov effect, the thorough study of toroidal solenoids and their use as effective transmitters of electromagnetic waves; and the topical questions of the Vavilov-Cherenkov radiation. Furthermore, concrete advice is given for the construction of magnetic and electric solenoids and the performance of experiments on the Bohm-Aharonov effect. In addition, properties of remarkable charge-current configurations and practical applications are studied. Audience: This volume will be of interest to postgraduate students and researchers dealing with new effective sources of electromagnetic waves.

It is indeed an honour for me to write the foreword to the second edition of Forest Entomology in West Tropical Africa: Forest Insects of Ghana. Originally co- thored by Professor Michael R. Wagner, Dr. S.K.N. Atuahene, and Dr. Joseph R. Cobbinah, the authorship now includes Dr. Paul P. Bosu, who replaces Dr. Atuahene of blessed memory (may his soul rest in perfect peace). In the preface to the first e- tion the authors stated their motivation for writing in these words: "e;We have written this book with the practicing forester and forest entomologist in mind."e; I am c- vinced beyond any doubt that the book has been, and continues to be, of immense benefit to the targeted audience. Over the course of the last 16 years, since the publication of the maiden edition in 1991, there have been tremendous changes in the science and practice of forest entomology in West Africa. Research has improved significantly and the volume of literature on the subject has also increased severalfold. The biology, ecology, and management of major insects for which very little was known nearly two decades ago have now been studied. At the same time, collaboration among forest entom- ogists and other scientists of West Africa improved significantly and greatly enhanced the science and practice of forest entomology in the subregion. The healthy development would greatly facilitate management of pest outbreaks, which invariably are not limited by national boundaries.