These lecture notes treat polynomial identity rings from both the combinatorial and structural points of view. The greater part of recent research in polynomial identity rings is about combinatorial questions, and the combinatorial part of the lecture notes gives an up-to-date account of recent research. On the other hand, the main structural results have been known for some time, and the emphasis there is on a presentation accessible to newcomers to the subject.
The theory of polynomial identities, as a well-defined field of study, began with a well-known 1948 article of Kaplansky. The field has since developed along two branches: the structural, which investigates the properties of rings which satisfy a polynomial identity; and the varietal, which investigates the set of polynomials in the free ring which vanish under all specializations in a given ring. This book is based on lectures delivered during an NSF-CBMS Regional Conference, held at DePaul University in July 1990, at which the author was the principal lecturer. The first part of the book is concerned with polynomial identity rings. The emphasis is on those parts of the theory related to n x n matrices, including the major structure theorems and the construction of certain polynomials identities and central polynomials for n x n matrices. The ring of generic matrices and its centre is described. The author then moves on to the invariants of n x n matrices, beginning with the first and second fundamental theorems, which are used to describe the polynomial identities satisfied by n x n matrices. One of the exceptional features of this book is the way it emphasizes the connection between polynomial identities and invariants of n x n matrices. Accessible to those with background at the level of a first-year graduate course in algebra, this book gives readers an understanding of polynomial identity rings and invariant theory, as well as an indication of current problems and research in these areas.
Scholars have long remarked on the frequency with which Japanese myths portrayed gods (kami) as old men or okina. Many of these “sacred elders” came to be featured in premodern theater, most prominently in Noh. In the closing decades of the twentieth-century, as the number of Japan’s senior citizens climbed steadily, the sacred elder of premodern myth became a subject of renewed interest and was seen by some as evidence that the elderly in Japan had once been accorded a level of respect unknown in recent times. In Buddhism and the Transformation of Old Age in Medieval Japan, Edward Drott charts the shifting sets of meanings ascribed to old age in medieval Japan, tracing the processes by which the aged body was transformed into a symbol of otherworldly power and the cultural, political, and religious circumstances that inspired its reimagination. Drott examines how the aged body was used to conceptualize forms of difference and to convey religious meanings in a variety of texts: official chronicles, literary works, Buddhist legends and didactic tales. In early Japan, old age was most commonly seen as a mark of negative distinction, one that represented the ugliness, barrenness, and pollution against which the imperial court sought to define itself. From the late-Heian period, however, certain Buddhist authors seized upon the aged body as a symbolic medium though which to challenge traditional dichotomies between center and margin, high and low, and purity and defilement, crafting narratives that associated aged saints and avatars with the cults, lineages, sacred sites, or religious practices these authors sought to promote. Contributing to a burgeoning literature on religion and the body, Buddhism and the Transformation of Old Age in Medieval Japan applies approaches developed in gender studies to “denaturalize” old age as a matter of representation, identity, and performance. By tracking the ideological uses of old age in premodern Japan, this work breaks new ground, revealing the role of religion in the construction of generational categories and the ways in which religious ideas and practices can serve not only to naturalize, but also challenge “common sense” about the body.
Sustainable product design is more than eco design: it goes beyond 'green' to consider the work environment, community impacts, consumer health, and economic viability, as well as environmental attributes. "Beyond Child's Play" explores the concept of sustainable product design in the context of the global doll-making industry. To initiate this research, the author reviewed eco design parameters and developed criteria for sustainable product design in the doll-making industry. Using this framework, she conducted three case studies of do I making: the American Girl doll produced in China, the Kathe Kruse doll produced in Germany and the Q'ewar Project doll produced in Peru. Themes emerged from this research that have relevance beyond the doll-making industry: the value of making a product with care; designing work for human dignity; intention and vision for sustainability; the implications of materials choices; and, transparency and sustainability. Sustainable product design calls for fundamentally new thinking. By connecting the term 'sustainable' to 'product', we raise expectations for a radically different approach to design, production, and consumption. This framework integrates the eco design principles of detoxification and dematerialization with the principle of 'humanization', to ensure that the work environment where the product is made is safe and healthy and that local communities benefit from production. This approach places increased responsibility on the industrial designer and decision-makers throughout the supply chain, including governments, corporations, and citizens. Sustainable product design can be implemented effectively only when systems are in place that support sustainable production and consumption.
An illustrated account of the little-known operations of the Imperial Japanese Naval Air Force's flying boat units during World War 2. Respectively codenamed the 'Mavis' and 'Emily' by the Allies, Japan's H6K and H8K flying boats outstripped their RAF and US Navy counterparts. The 1941 outbreak of war in the Pacific and Southeast Asia saw these remarkable aircraft carry out offensive missions across vast tracts of ocean and employ their unique capabilities to escort convoys and serve as transports between Japan's island bases. However, while the technical details of the H6K and H8K are well known in the West, this important new study marks the first English-language account of their wartime operations. Utilizing newly translated Japanese war diaries, as well as Allied intelligence and combat reports, celebrated Pacific War expert Edward M. Young reveals the full story behind the Imperial Japanese Naval Air Force's flying boat units. Contemporary photos and 22 colour profiles bring new dimensions to this fascinating area of Japanese military history, vividly illustrating the pivotal roles of 'Emily' and 'Mavis' in events including the Battle of the Coral Sea, the Battle of Midway and the fighting in the Aleutians and the Bismarck and Solomon Islands.
This issue of Otolaryngologic Clinics, guest edited by Drs. Abtin Tabaee and Edward D. McCoul, is devoted to Refractory Chronic Rhinosinusitis. Articles in this issue include: Classification of Chronic Rhinosinusitis: Working Towards Personalized Diagnosis; Bacterial Pathogens and the Microbiome; Biofilm and Osteitis; Refractory Chronic Sinusitis with Polyposis; Aspirin-Exacerbated Respiratory Disease; Systemic and Odontogenic Etiologies in Chronic Rhinosinusitis; Genetic and Immune Dysregulation in Chronic Rhinosinusitis; Office Procedures in Refractory Chronic Rhinosinusitis; Topical Therapies and Stents; Revision Functional Endoscopic Sinus Surgery; Extended Endoscopic and Open Sinus Surgery for Refractory Chronic Rhinosinusitis; and An Algorithm for Comprehensive Evaluation and Management of Refractory Chronic Rhinosinusitis.
This useful manual provides a means for easy identification of the native and cultivated conifers of northeastern North America. The territory covered is roughly eastern Canada and the northeastern fourth of the United States, from Maine south to the southern border of Pennsylvania, west to Kansas, and north to North Dakota. Because it includes so many cultivated species, the book treats the great majority of conifers found in the western United States and Europe as well. Twenty-seven genera and 130 species are included.
Although uncommon, the occurrence of cataracts in very young patients can result in significant impairment—and can lead to blindness. This practical guide delivers need-to-know information to help clinicians treat pediatric patients with cataracts with a range of therapies and essential guidance on the management of complications. Explore the only reference devoted exclusively to pediatric cataract management! • 13 new chapters highlight the latest advances in bilateral cataract surgery, intraocular heparin treatment, treatment of traumatic cataracts, pre- and postoperative management, and techniques appropriate for patients in developing nations. • 4 hours of online procedural video accompany the text—giving readers a clinician’s view of essential procedures. A great way to refine technique, improve outcomes, avoid pitfalls, and manage potential complications. • Quick-reference format helps readers locate vital information at a glance.
Stanford University hosted the XIX International Symposium on Lepton and Photon Interactions at High Energies on August 9 - 14, 1999, at the Law School on the Stanford University Campus, the site of the previous Symposia. This volume constitutes the proceedings of the Symposium.
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