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1000 tulosta hakusanalla Lee H. Butler

Stability of Structures

Stability of Structures

Chai H Yoo; Sung Lee

Butterworth-Heinemann Inc
2011
sidottu
The current trend of building more streamlined structures has made stability analysis a subject of extreme importance. It is mostly a safety issue because Stability loss could result in an unimaginable catastrophe. Written by two authors with a combined 80 years of professional and academic experience, the objective of Stability of Structures: Principles and Applications is to provide engineers and architects with a firm grasp of the fundamentals and principles that are essential to performing effective stability analysts. Concise and readable, this guide presents stability analysis within the context of elementary nonlinear flexural analysis, providing a strong foundation for incorporating theory into everyday practice. The first chapter introduces the buckling of columns. It begins with the linear elastic theory and proceeds to include the effects of large deformations and inelastic behavior. In Chapter 2 various approximate methods are illustrated along with the fundamentals of energy methods. The chapter concludes by introducing several special topics, some advanced, that are useful in understanding the physical resistance mechanisms and consistent and rigorous mathematical analysis. Chapters 3 and 4 cover buckling of beam-columns. Chapter 5 presents torsion in structures in some detail, which is one of the least well understood subjects in the entire spectrum of structural mechanics. Strictly speaking, torsion itself does not belong to a topic in structural stability, but needs to be covered to some extent for a better understanding of buckling accompanied with torsional behavior. Chapters 6 and 7 consider stability of framed structures in conjunction with torsional behavior of structures. Chapters 8 to 10 consider buckling of plate elements, cylindrical shells, and general shells. Although the book is primarily devoted to analysis, rudimentary design aspects are discussed.
Saints of Resistance

Saints of Resistance

Christina H. Lee

Oxford University Press Inc
2021
sidottu
Eighty percent of Filipinos (about 80 million people) identify with the Catholic faith. Visitors to the Philippines might find it surprising that images of Catholic saints, the Child Christ, and the Virgin Mary can be seen in all kinds of public and private spaces throughout this Asian country, such as in restaurants, shopping malls, pasted to walls, painted on buses, and of course, in-home altars. Many of these saints bear Spanish names and their legends almost always date to the period of Spanish colonialism. Saints of Resistance: Devotions in the Philippines under Early Spanish Rule explores why, in spite of their fraught history with Spanish colonialism (which ended in 1898), Filipinos have staunchly held on to the faith in their saints. This is the first scholarly study to focus on the dynamic life of saints and their devotees in the Spanish Philippines, from the sixteenth through the early part of the eighteenth century. The book offers an in-depth analysis of the origins and development of the beliefs and rituals surrounding some of the most popular saints in the Philippines, namely, Santo Niño de Cebu, Our Lady of Caysasay, Our Lady of La Naval, and Our Lady of Antipolo. Christina Lee recovers the voices of colonized Philippine subjects as well as those of Spaniards who, through the veneration of miraculous saints, projected and relieved their grievances, anxieties, and histories of communal suffering. Based on critical readings of primary sources, the book traces how individuals and their communities often refashioned iconographic devotions to the Holy Child and to the Virgin Mary by introducing non-Catholic elements derived from pre-Hispanic, animistic, and Chinese traditions. Ultimately, the book reveals how Philippine natives, Chinese migrants, and Spaniards reshaped the imported devotions as expressions of dissidence, resistance, and survival.
How to Grow a Robot

How to Grow a Robot

Mark H. Lee

MIT Press
2020
sidottu
How to develop robots that will be more like humans and less like computers, more social than machine-like, and more playful and less programmed.Most robots are not very friendly. They vacuum the rug, mow the lawn, dispose of bombs, even perform surgery-but they aren't good conversationalists. It's difficult to make eye contact. If the future promises more human-robot collaboration in both work and play, wouldn't it be better if the robots were less mechanical and more social? In How to Grow a Robot, Mark Lee explores how robots can be more human-like, friendly, and engaging.Developments in artificial intelligence-notably Deep Learning-are widely seen as the foundation on which our robot future will be built. These advances have already brought us self-driving cars and chess match-winning algorithms. But, Lee writes, we need robots that are perceptive, animated, and responsive-more like humans and less like computers, more social than machine-like, and more playful and less programmed. The way to achieve this, he argues, is to "grow" a robot so that it learns from experience-just as infants do. After describing "what's wrong with artificial intelligence" (one key shortcoming: it's not embodied), Lee presents a different approach to building human-like robots: developmental robotics, inspired by developmental psychology and its accounts of early infant behavior. He describes his own experiments with the iCub humanoid robot and its development from newborn helplessness to ability levels equal to a nine-month-old, explaining how the iCub learns from its own experiences. AI robots are designed to know humans as objects; developmental robots will learn empathy. Developmental robots, with an internal model of "self," will be better interactive partners with humans. That is the kind of future technology we should work toward.
Lair of the Lion

Lair of the Lion

Lee Stout; Harry H. West

Pennsylvania State University Press
2017
sidottu
Football is an unmistakable part of the culture of Penn State, though the experience of a Nittany Lions home game—from the crowds and tailgates to the spectacle of the game itself—has changed significantly over the years. This richly illustrated and researched book tells the story of the structure that has evolved along with the university’s celebrated football program: the iconic Beaver Stadium.Historian Lee Stout and engineering professor Harry H. West show how Beaver Stadium came to be, including a look at its predecessors, “Old” Beaver Field, built in 1893 on a site centrally located northeast of Old Main, and “New” Beaver Field, built on the northwest corner of campus in 1909. Stout and West explore the engineering and construction challenges of the stadium and athletic fields and reveal the importance of these facilities to the history of Penn State and its cherished traditions.Packed with archival photos and fascinating stories, Lair of the Lion is a celebration of the ways in which Penn State fans, students, and athletes have experienced home games from the 1880s to the present day, and of the monumental structure that the Lions now call home.
Fluid Flow in Discontinuous Rocks

Fluid Flow in Discontinuous Rocks

C.h. Lee; I.W. Farmer

Chapman and Hall
1993
sidottu
This is the first book to consider rock discontinuity systems and individual discontinuities as the controlling factors determining fluid flow through rocks. It develops simple usable fracture flow models based on an understanding of discontinuity structure and the mechanics of rock and discontinuity deformation.
Rice Plus

Rice Plus

Susan H. Lee

Routledge
2012
nidottu
This book explores the economic coping practices of rural widows in the aftermath of the Cambodian civil war. War produces a preponderance of widows, often young widows with small children in their care. Rural widows must feed their families and educate their children despite rural poverty and the lack of opportunities for women. The economics of widowhood is therefore a significant social problem in less developed countries.The widows' predominant economic plan was to combine rice cultivation with an assortment of microenterprises, a "rice plus" strategy. Many widows were unable to grow enough rice on their land to feed their families. They filled the hunger gap by raising cash through microenterprises to purchase additional rice. Gender work roles were both permeable and persistent, allowing a flexible sexual division of labor in the short run but maintaining traditional roles in the long run. Most widows called on relatives or exchanged transplanting labor for male plowing services, although a few women took up the plow themselves. The study also explores widows' access to key economic resources such as land, credit, and education.War decimated widows' family support networks, including the loss of children, their social security. The study concludes that Cambodia's gender arrangement offered many economic options to widows but also devalued their labor in a cultural structure of inequality. Gender, poverty, and war interacted to reduce widows' financial resources, accounting for their economic vulnerability.