Decomposing an abelian group into a direct sum of its subsets leads to results that can be applied to a variety of areas, such as number theory, geometry of tilings, coding theory, cryptography, graph theory, and Fourier analysis. Focusing mainly on cyclic groups, Factoring Groups into Subsets explores the factorization theory of abelian groups. The book first shows how to construct new factorizations from old ones. The authors then discuss nonperiodic and periodic factorizations, quasiperiodicity, and the factoring of periodic subsets. They also examine how tiling plays an important role in number theory. The next several chapters cover factorizations of infinite abelian groups; combinatorics, such as Ramsey numbers, Latin squares, and complex Hadamard matrices; and connections with codes, including variable length codes, error correcting codes, and integer codes. The final chapter deals with several classical problems of Fuchs. Encompassing many of the main areas of the factorization theory, this book explores problems in which the underlying factored group is cyclic.

Decomposing an abelian group into a direct sum of its subsets leads to results that can be applied to a variety of areas, such as number theory, geometry of tilings, coding theory, cryptography, graph theory, and Fourier analysis. Focusing mainly on cyclic groups, Factoring Groups into Subsets explores the factorization theory of abelian groups.

The book first shows how to construct new factorizations from old ones. The authors then discuss nonperiodic and periodic factorizations, quasiperiodicity, and the factoring of periodic subsets. They also examine how tiling plays an important role in number theory. The next several chapters cover factorizations of infinite abelian groups; combinatorics, such as Ramsey numbers, Latin squares, and complex Hadamard matrices; and connections with codes, including variable length codes, error correcting codes, and integer codes. The final chapter deals with several classical problems of Fuchs.

Encompassing many of the main areas of the factorization theory, this book explores problems in which the underlying factored group is cyclic.

Selye pioneered the concept of biologic stress and contributed to the exploration of this field for over 40 years. He established the Hans Selye Foundation in 1980 to promote research and education on stress. In the spirit of the Foundation, Dr. Marc Cantin, late president, and Drs. Sandor Szabo and Yvette Tache, vice presidents, have established the Hans Selye Symposia on Neuroendocrinology stress conference and book series. So far three symposia have been held in Montreal where Selye started to work in the 1930's. These symposia bring together laboratory and clinical investigators engaged in the study of the neuroendocrinology, pathophysiology of stress, and related fields. The first Hans Selye Symposium, held in 1986, was devoted to "Neuropeptides and Stress" and the proceedings were published by Springer Verlag. In 1992, in commemoration of the tenth anniversary of Selye's passing in October 1982, another Hans Selye Symposium was organized and was entitled "Corticotropin-Releasing Factor and Cytokines: Role in the Stress Response". The proceedings recently appeared in 1993 as volume 697 of the New York Academy of Sciences. A substantial part of the present volume originates from the Hans Selye Symposium and devoted to the "Neuroendocrinology of Gastrointestinal Ulceration".

Mobile communication is an integrated part of our daily lives. It surrounds us, and provides a ubiquitous communication channel even for the most demanding multimedia services. The focus of mobile communication shifts from voice to mobile broadband data services. Mobile operators are introducing novel techniques, such as High Speed Packet Data (HSXPA) and UMTS LTE (Long Term Evolution), to serve more traffic on the radio interface. Radio cells are also getting smaller, so mobile operators can achieve higher level of spatial reuse of the radio channels, too. Besides transmission speed, the quality of the connection is also a very important aspect, which might turn the balance in the competition among operators. The topic of my dissertation is finding the right balance between the quantity and the quality in mobile networks, by focusing on three main aspects: 1.) Tracking mobile user movements in cellular mobile wireless networks, 2.) A Ring based Call Admission Control algorithm and Ring Based Mobility management algorithm, 3.) The performance evaluation of Anycast Based Micro-mobility Management

Neuroendocrine Factors in Ulcer Pathogenesis: Role of Sensory Neurons in the Control of Gastric Mucosal Blood Flow and Protection; P. Holzer, et al. Sympathoadrenergic Regulation of Duodenal Mucosal Alkaline Secretion; L. Fandriks, C. Joenson. Potentiation of Intestinal Secretory Responses to Histamine: Pathophysiological Implications; P. Rangachari, et al. Braingut Interactions in Ulcer Pathogenesis: Neuroendocrine Control of Gastric Acid Secretion; Y. Osumi. Corticotropinreleasing Factor in Stressinduced Changes in Gastrointestinal Transit; T. Burks. Stress, Corticotrophinreleasing Factor; (CRF) and Gastric Function; H. Weiner. Novel Therapeutic Approaches to Gastrointestinal Ulceration: The Gastric Mucosal Barrier: A Dynamic, Multifunctional System; A. Garner, et al. New Approaches to Gastroprotection: Calcium Modulators; G.B. Glavin, A.M. Hall. Efficacy of Dopaminergic Agents in Peptic Ulcer Healing and Relapse Prevention: Further Indication of the Importance of Stomach Dopamine in the Stressorganoprotection Concept; P. Sikiric, et al. Dietary Factors Influencing Gastrointestinal Ulceration: The Luminal Regulatory System; F. Guarner, et al. 14 additional articles. Index.

Written by active researchers in the field, this unique book provides a detailed review of esophageal, gastroduodenal ileal, and colonic models of mucosal inflammation and ulceration. Animal Models of Mucosal Inflammation not only presents up-to-date techniques and models but also provides the latest data on the mechanistic approach to treatment and prevention.

The latest data on the pathogenesis of ulcer disease is presented in this text, with the emphasis that an understanding of the pathogenesis and etiology of ulcer diseases represents the most rational approach to pharmacology - the prevention and treatment of ulcer disease. Early and late biochemical and functional changes, morphologic stages of the injury and healing phases, as well as vascular factors in ulceration are highlighted. In addition, new pathogenetic elements on neuroendocrine and other endogenous modulators and circadian rhythms in ulcerogenesis are covered. The section on new pharmacology consists of several chapters presenting new animal models of gastric, small intestinal and colonic ulcers because in vivo models represent the basis to test and accurately detect new antiulcer drugs. A large series of chapters cover new drugs for ulcer prevention and treatment. This book is indispensible to investigators in basic and applied research, academic and industrial pharmacologists and clinicians in gastroenterology.