Hi Sun Choi's Books

Outrigger Design for High-Rise Buildings

By: Hi Sun Choi,Goman Ho,Leonard Joseph,Neville Mathias,Ctbuh

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Outrigger Design for High-Rise Buildings

By: Hi Sun Choi,Goman Ho,Leonard Joseph,Neville Mathias,Ctbuh

Outrigger systems are rigid horizontal structures designed to improve a building’s stability and strength by connecting the building core or spine to distant columns, much in the way an outrigger can prevent a canoe from overturning. Outriggers have been used in tall, narrow buildings for nearly 500 years, but the basic design principle dates back centuries. In the 1980s, as buildings grew taller and more ambitious, outrigger systems eclipsed tubular frames as the most popular structural approach for supertall buildings. Designers embraced properly proportioned core-and-outrigger schemes as a method to offer far more perimeter flexibility and openness for tall buildings than the perimeter moment or braced frames and bundled tubes that preceded them. However, the outrigger system is not listed as a seismic lateral load-resisting system in any code, and design parameters are not available, despite the increasingly frequent use of the concept. The Council on Tall Buildings and Urban Habitat’s Outrigger Working Group has addressed the pressing need for design guidelines for outrigger systems with this guide, a comprehensive overview of the use of outriggers in skyscrapers. This guide offers detailed recommendations for analysis of outriggers within the lateral load-resisting systems of tall buildings, for recognizing and addressing effects on building behavior and for practical design solutions. It also highlights concerns specific to the outrigger structural system such as differential column shortening and construction sequence impacts. Several project examples are explored in depth, illustrating the role of outrigger systems in tall building designs and providing ideas for future projects. The guide details the impact of outrigger systems on tall building designs, and demonstrates ways in which the technology is continuously advancing to improve the efficiency and stability of tall buildings around the world.

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Page Count

229

Publisher

Routledge

Published Date

ISBN 10

1317341716

ISBN 13

9781317341710

North Korea at a Crossroads

By: Suk Hi Kim

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North Korea at a Crossroads

By: Suk Hi Kim

Some fifty years after war, the Korean peninsula remains divided at the 38th parallel. The end of the Cold War in 1989 brought changes to many communist states, but North Korea remains embroiled in international crises. Looking forward, North Korea seemingly faces four choices: collapse, further war, peaceful reunification with the south, or status quo. This historical and political analysis covers the period from the division of the peninsula in 1948 to the future of North Korea beyond 2003. Topics include the Korean War, Kim Il Sung, famine, the economic collapse of the 1990s, Kim Jong Il, South Korea's sunshine policy, nuclear ambitions, "rogue state" status, George W. Bush's "axis of evil" remark made during his 2002 State of the Union address, and the current state of diplomatic relations. The final chapter considers the case for reconciliation. Appendix A is a chronology of the Korean Peninsula from 2333 BCE to 2003 CE. Appendix B is a directory of Korean Studies institutes and think tanks. Tables and statistics are integrated throughout the text. Reader aids accompany each chapter, including lists of further reading, key terms and questions.

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Page Count

232

Publisher

McFarland

Published Date

ISBN 10

0786481056

ISBN 13

9780786481057

Shear Wave Elastography of Thyroid Nodules

A Guide to Differential Diagnosis by Means of the Stiffness Map

By: Myung Hi Yoo,Hye Jeong Kim,In Ho Choi,Sumi Yun

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Shear Wave Elastography of Thyroid Nodules

A Guide to Differential Diagnosis by Means of the Stiffness Map

By: Myung Hi Yoo,Hye Jeong Kim,In Ho Choi,Sumi Yun

This book is a superbly illustrated, comprehensive guide to the differential diagnosis of thyroid nodules by means of shear wave elastography. A wealth of representative clinical cases are used to demonstrate the value of the stiffness map in identifying the degree and pattern of fibrosis. The goal is to enable readers to identify the characteristic differential diagnostic features of nodular hyperplasia, thyroiditis, follicular adenoma, and the various types of thyroid cancer and to predict the final histopathology on the basis of the imaging findings. With this in mind, correlations between the appearances on shear wave elastography and conventional ultrasonography and the findings of fine-needle aspiration cytology, core needle biopsy, and surgical biopsy are highlighted. In addition, the fundamental principles of shear wave elastography are clearly explained and related to clinical practice in the field of thyroid disease. Both radiologists and clinicians will find the book to be an excellent asset that aids in correct preoperative diagnosis.

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Page Count

169

Publisher

Springer Nature

Published Date

ISBN 10

981336873X

ISBN 13

9789813368736

Yi Kwang-su and Modern Korean Literature, Mujŏng

By: Ann Sung-hi Lee

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Yi Kwang-su and Modern Korean Literature, Mujŏng

By: Ann Sung-hi Lee

Yi Kwang-su (1892-1950) was one of the pioneers of modern Korean literature. When the serialization of Mujông (The Heartless) began in 1917, it was an immediate sensation, and it occupies a prominent place in the Korean literary canon. The Heartless is the story of a love triangle among three youths during the Japanese occupation. Yi Hyông-sik is a young man in his mid-twenties who is teaching English at a middle school in Seoul. Brilliant but also shy and indecisive, he is torn between two women. Kim Sôn-hyông is from a wealthy Christian family; she has just graduated from a modern, Western-style school and is planning on continuing her studies in the United States. Pak Yông-ch'ae is a musically gifted young woman who was raised in a traditional Confucian manner; due to family misfortune, she has become a kisaeng but remains devoted to Hyông-sik whom she knew as a child. The Heartless goes beyond the level of romantic melodrama and uses these characters to depict Korea's struggles with modern culture and national identity.A long critical introduction discusses Yi Kwang-su's life and work from his birth in 1892 to the publication of his first novel The Heartless in 1917. It contains in-depth analyses of the novel, Yi Kwang-su's literary theory, and early short stories.

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Page Count

396

Publisher

Cornell University - Cornell East Asia Series

Published Date

ISBN 10

188544527X

ISBN 13

9781885445278

Outrigger Design for High-Rise Buildings

By: Hi Sun Choi,Goman Ho,Leonard Joseph,Neville Mathias,Ctbuh

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Outrigger Design for High-Rise Buildings

By: Hi Sun Choi,Goman Ho,Leonard Joseph,Neville Mathias,Ctbuh

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Page Count

229

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Routledge

Published Date

ISBN 10

1317341716

ISBN 13

9781317341710

Outrigger Design for High-Rise Buildings

An Output of the CTBUH Outrigger Working Group

By: Hi Sun Choi,Leonard Joesph,Neville Mathias

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Outrigger Design for High-Rise Buildings

An Output of the CTBUH Outrigger Working Group

By: Hi Sun Choi,Leonard Joesph,Neville Mathias

-Addresses the need for design guidelines, based around the role and impact of outrigger systems in tall buildings -Written by CTBUH, experts in tall building technologies -This new edition features updated design considerations to reflect current practices, expanded systems organisation and examples, and updated recommendations and suggestions for future research The Council on Tall Buildings and Urban Habitat's Outrigger Working Group has addressed the pressing need for design guidelines for outrigger systems with this guide, now in its second edition, providing a comprehensive overview of the use of outriggers in skyscrapers. This guide offers detailed recommendations for analysis of outriggers within the lateral load resisting systems of tall buildings, for recognising and addressing effects on building behaviour and for practical design solutions. It also highlights concerns specific to the outrigger structural system, such as differential column shortening and construction sequence impacts. In this edition, a new chapter explores the use of 'hybrid' outrigger systems that can 'tune' the stiffness of outrigger trusses, use leverage of the outrigger arms to drive non-linear damping devices, and use yielding materials that absorb seismic energy. Several project examples are explored in depth, illustrating the role of outrigger systems in tall building designs and providing ideas for future projects. The guide details the impact of outrigger systems on tall building designs, and demonstrates ways in which the technology is continuously advancing to improve the efficiency and stability of tall buildings around the world. The new second edition features updated design considerations to reflect current practices, expanded systems organisation and examples, and updated recommendations and suggestions for future research.

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Page Count

100

Published Date

ISBN 10

1864707283

ISBN 13

9781864707281

Book's by Hi Sun Choi

Outrigger Design for High-Rise Buildings

Outrigger Design for High-Rise Buildings

North Korea at a Crossroads

North Korea at a Crossroads

Shear Wave Elastography of Thyroid Nodules

Shear Wave Elastography of Thyroid Nodules

Yi Kwang-su and Modern Korean Literature, Mujŏng

Yi Kwang-su and Modern Korean Literature, Mujŏng

Outrigger Design for High-Rise Buildings

Outrigger Design for High-Rise Buildings

Outrigger Design for High-Rise Buildings

Outrigger Design for High-Rise Buildings

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