The Great Recession of 2008 restored John Maynard Keynes to prominence. After decades when the Keynesian revolution seemed to have been forgotten, the great British theorist was suddenly everywhere. The New York Times asked, "What would Keynes have done?" The Financial Times wrote of "the undeniable shift to Keynes." Le Monde pronounced the economic collapse Keynes's "revenge." Two years later, following bank bailouts and Tea Party fundamentalism, Keynesian principles once again seemed misguided or irrelevant to a public focused on ballooning budget deficits. In this readable account, Backhouse and Bateman elaborate the misinformation and caricature that have led to Keynes's repeated resurrection and interment since his death in 1946. Keynes's engagement with social and moral philosophy and his membership in the Bloomsbury Group of artists and writers helped to shape his manner of theorizing. Though trained as a mathematician, he designed models based on how specific kinds of people (such as investors and consumers) actually behave--an approach that runs counter to the idealized agents favored by economists at the end of the century. Keynes wanted to create a revolution in the way the world thought about economic problems, but he was more open-minded about capitalism than is commonly believed. He saw capitalism as essential to a society's well-being but also morally flawed, and he sought a corrective for its main defect: the failure to stabilize investment. Keynes's nuanced views, the authors suggest, offer an alternative to the polarized rhetoric often evoked by the word "capitalism" in today's political debates.

本部描写摇滚史上最伟大音乐家之一约翰·温斯顿·列侬的纪录片《约翰列侬的理想世界》，以超过240小时的电影及录影片段，及穿插其中的36首经典名曲，讲述着这位摇滚乐坛有史以来最富传奇色彩的灵魂人物。
影片收录了多段未被公开的私人视频片段，扑捉记录下列侬这位在音乐世界中狂放不羁才华横溢的天才，在生活中的多重侧面。这些精彩珍贵的视频镜头在36首传唱度极高的经典歌曲中，道出了列侬这位乐坛巨匠背后鲜为人知的故事。

This book comprehensively discusses the neural network models from a statistical mechanics perspective. It starts with one of the most influential developments in the theory of neural networks: Hopfield's analysis of networks with symmetric connections using the spin system approach and using the notion of an energy function from physics. Introduction to the Theory of Neural Computation uses these powerful tools to analyze neural networks as associative memory stores and solvers of optimization problems. A detailed analysis of multi-layer networks and recurrent networks follow. The book ends with chapters on unsupervised learning and a formal treatment of the relationship between statistical mechanics and neural networks. Little information is provided about applications and implementations, and the treatment of the material reflects the background of the authors as physicists. However the book is essential for a solid understanding of the computational potential of neural networks. Introduction to the Theory of Neural Computation assumes that the reader is familiar with undergraduate level mathematics, but does not have any background in physics. All of the necessary tools are introduced in the book.

In the summer of 1869, John Muir made his first long trip to Yosemite. When a friend offered him the chance to accompany his flock of sheep and a shepherd to the high pastures of the Sierra, it was an opportunity Muir could not resist. My First Summer in the Sierra is the journal he kept of those summer days, of the wildlife and plant life, and of his explorations into the magical places of the mountains.

General Books publication date: 2009 Original publication date: 1865 Original Publisher: J. Gould Subjects: Birds Juvenile Nonfiction / Animals / Birds Nature / Birds

Vivid and animated, in living color
John Gould (1804-1881) was without question the most prolific ornithological artist of the 19th century, and the only one to rival John James Audubon in ambition and quality. Gould shared the romantic enthusiasm of his time for bird specimens as well as the popular impulse to catalogue. He combined his passion for natural history with outstanding scientific, artistic and entrepreneurial talents. Drawing on these abilities, he embarked on a series of projects that would eventually make him the leading publisher of ornithological illustrations in Victorian Britain. Gould's unparalleled career spanned five decades, during which he produced a series of books depicting birds from all over the world.
The dazzling illustrations from Gould's "Monograph of the Ramphastidae," or "Family of Toucans, " are generally thought to represent his most dramatic, magnificent images. The amazing range of vivid colors--shiny black, vibrant red, yellow, and orange--creates an unprecedented sense of animation. Shown against simple backgrounds, the birds seem to emerge, large and engaging, from the page; Gould's toucans appear as living creatures, not two-dimensional representations. The inspiration for "Toucans" came while Gould was working on his "Birds of Europe, " when he became fascinated by the toucan collection of a fellow ornithologist. He made several trips to central European museums to gather material for "Toucans, " and after publication of the first edition, redrew some of the plates and added 20 new birds to this revised and expanded second edition. All are included here.
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Monograph of the Ramphastidae, or Family of Toucans, "London, 1852-1854, 51 hand-colored lithographs