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Instability and Non-uniqueness for the 2D Euler Equations, after M. Vishik - Elia Brue - Bog - Princeton University Press - Plusbog.dk

Instability and Non-uniqueness for the 2D Euler Equations, after M. Vishik - Elia Brue - Bog - Princeton University Press - Plusbog.dk

An essential companion to M. Vishik’s groundbreaking work in fluid mechanicsThe incompressible Euler equations are a system of partial differential equations introduced by Leonhard Euler more than 250 years ago to describe the motion of an inviscid incompressible fluid. These equations can be derived from the classical conservations laws of mass and momentum under some very idealized assumptions. While they look simple compared to many other equations of mathematical physics, several fundamental mathematical questions about them are still unanswered. One is under which assumptions it can be rigorously proved that they determine the evolution of the fluid once we know its initial state and the forces acting on it. This book addresses a well-known case of this question in two space dimensions. Following the pioneering ideas of M. Vishik, the authors explain in detail the optimality of a celebrated theorem of V. Yudovich from the 1960s, which states that, in the vorticity formulation, the solution is unique if the initial vorticity and the acting force are bounded. In particular, the authors show that Yudovich’s theorem cannot be generalized to the L^p setting.

DKK 549.00
2

Laminar Flow Theory - P. A. Lagerstrom - Bog - Princeton University Press - Plusbog.dk

Laminar Flow Theory - P. A. Lagerstrom - Bog - Princeton University Press - Plusbog.dk

Fluid mechanics is one of the greatest accomplishments of classical physics. The Navier-Stokes equations, first derived in the eighteenth century, serve as an accurate mathematical model with which to describe the flow of a broad class of real fluids. Not only is the subject of interest to mathematicians and physicists, but it is also indispensable to mechanical, aeronautical, and chemical engineers, who have to apply the equations to real-world examples, such as the flow of air around an aircraft wing or the motion of liquid droplets in a suspension. In this book, which first appeared in a comprehensive collection of essays entitled The Theory of Laminar Flows (Princeton, 1964), P. A. Lagerstrom imparts the essential theoretical framework of laminar flows to the reader. A concise and elegant description, Lagerstrom''s work remains a model piece of writing and has much to offer today''s reader seeking an introduction to the flow of nonturbulent fluids. Beginning with the conservation laws that result in the equation of continuity, the Navier-Stokes equation, and the energy transport equation, Lagerstrom moves on to consider viscous waves, low Reynolds-number approximations such as Stokes flow and the Oseen equations, and then high Reynolds-number approximations that are used to describe boundary layers, jets, and wakes. Finally, he examines some compressibility effects, such as those that occur in the laminar boundary layer around a flat plate, both with and without a pressure gradient.

DKK 758.00
2

Nationalist Politics and Everyday Ethnicity in a Transylvanian Town - Jon Fox - Bog - Princeton University Press - Plusbog.dk

Nationalist Politics and Everyday Ethnicity in a Transylvanian Town - Jon Fox - Bog - Princeton University Press - Plusbog.dk

Situated on the geographic margins of two nations, yet imagined as central to each, Transylvania has long been a site of nationalist struggles. Since the fall of communism, these struggles have been particularly intense in Cluj, Transylvania''s cultural and political center. Yet heated nationalist rhetoric has evoked only muted popular response. The citizens of Cluj--the Romanian-speaking majority and the Hungarian-speaking minority--have been largely indifferent to the nationalist claims made in their names. Based on seven years of field research, this book examines not only the sharply polarized fields of nationalist politics--in Cluj, Transylvania, and the wider region--but also the more fluid terrain on which ethnicity and nationhood are experienced, enacted, and understood in everyday life. In doing so the book addresses fundamental questions about ethnicity: where it is, when it matters, and how it works. Bridging conventional divisions of academic labor, Rogers Brubaker and his collaborators employ perspectives seldom found together: historical and ethnographic, institutional and interactional, political and experiential. Further developing the argument of Brubaker''s groundbreaking Ethnicity without Groups , the book demonstrates that it is ultimately in and through everyday experience--as much as in political contestation or cultural articulation--that ethnicity and nationhood are produced and reproduced as basic categories of social and political life.

DKK 413.00
3

Meeting Needs - David Braybrooke - Bog - Princeton University Press - Plusbog.dk

Meeting Needs - David Braybrooke - Bog - Princeton University Press - Plusbog.dk

The concept of needs works to sort out social policies. Yet the idea is in disrepute with many thinkers who, led by economists, accuse it of being too fluid, or too narrow, or of serving no purpose that the concept of preferences does not serve better. David Braybrooke refutes these charges by providing a model of how the concept of needs works when it is working well.Originally published in 1987.The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

DKK 531.00
3

Digital Design - Stephen J. Eskilson - Bog - Princeton University Press - Plusbog.dk

Digital Design - Stephen J. Eskilson - Bog - Princeton University Press - Plusbog.dk

A groundbreaking history of digital design from the nineteenth century to today Digital design has emerged as perhaps the most dynamic force in society, occupying a fluid, experimental space where product design intersects with art, film, business, engineering, theater, music, and artificial intelligence. Stephen Eskilson traces the history of digital design from its precursors in the nineteenth century to its technological and cultural ascendency today, providing a multifaceted account of a digital revolution that touches all aspects of our lives.We live in a time when silicon processors, miniaturization, and CAD-enhanced 3D design have transformed the tangible world of cars and coffee makers as well as the screen world on our phones, computers, and game systems. Eskilson provides invaluable historical perspective to help readers better understand how digital design has become such a vibrant feature of the contemporary landscape. He covers topics ranging from graphic and product design to type, web design, architecture, data visualization, and virtual reality. Along the way, he paints compelling portraits of key innovators behind this transformation, from foundational figures such as Marshall McLuhan, Nam June Paik, and April Greiman to those mapping new frontiers, such as Jeanne Gang, Jony Ive, Yugo Nakamura, Neri Oxman, and Jewel Burks Solomon.Bringing together an unprecedented array of sources on digital design, this comprehensive and richly illustrated book reveals how many of the digital practices we think of as cutting-edge actually originated in the analog age and how the history of digital design is as much about our changing relationship to forms as the forms themselves. This book’s distinctive cover design features an overlay of raised dots printed in clear ink. The dots are tactile representations of the pixels that make up so much of digital design and refer to the origins of the term “digital”— digitus is the Latin word for finger, the most basic means of counting. As with the printing of braille, the pattern of raised dots is made to be felt with the fingers, or digits.

DKK 389.00
3