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1. |
Record Nr. |
UNINA9910734093103321 |
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Autore |
Nguyen-Schafer Hung |
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Titolo |
Aero and vibroacoustics of automotive turbochargers / / Hung Nguyen-Schafer |
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Pubbl/distr/stampa |
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New York, : Springer, 2013 |
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ISBN |
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3-642-35070-4 |
1-299-19787-6 |
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Edizione |
[1st ed. 2013.] |
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Descrizione fisica |
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1 online resource (xv, 136 pages) : illustrations (some color) |
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Collana |
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Disciplina |
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620 |
620.2 |
621.4361 |
621.8/2 |
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Soggetti |
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Automobiles - Motors - Superchargers |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Introduction to Turbocharging -- Induced Noise Types -- Acoustic Propagation Theory -- Analyzing Root Causes of Noise -- Computational Nonlinear Rotordynamics of Turbochargers -- Subsynchronous Constant Tone -- Eigenfrequency Modifications to Reduce Constant Tone Level. |
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Sommario/riassunto |
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Aero and Vibroacoustics of Automotive Turbochargers is a topic involving aspects from the working fields of thermodynamics of turbomachinery, aerodynamics, rotordynamics, and noise propagation computation. In this broadly interdisciplinary subject, thermodynamics of turbomachinery is used to design the turbocharger and to determine its operating conditions. Aerodynamics is needed to study the compressor flow dynamics and flow instabilities of rotating stall and surge, which can produce growling and whining-type noises. Rotordynamics is necessary to study rotor unbalance and self-excited oil-whirl instabilities, which lead to whistling and constant tone-type noises in rotating floating oil-film type bearings. For the special case of turbochargers using ball bearings, some high-order harmonic and wear noises also manifest in the rotor operating range. Lastly, noise propagation computation, based on Lighthill’s analogy, is required to |
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investigate airborne noises produced by turbochargers in passenger vehicles. The content of this book is intended for advanced undergraduates, graduates in mechanical engineering, research scientists and practicing engineers who want to better understand the interactions between these working fields and the resulting impact on the interesting topic of Aero and Vibroacoustics of Automotive Turbochargers. |
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2. |
Record Nr. |
UNINA9910436252203321 |
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Autore |
Cho Hwisang |
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Titolo |
The power of the brush : epistolary practices in Chosŏn Korea / / Hwisang Cho |
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Pubbl/distr/stampa |
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University of Washington Press, 2020 |
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Seattle : , : University of Washington Press, , 2020 |
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©2020 |
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ISBN |
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Edizione |
[1st ed.] |
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Descrizione fisica |
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1 online resource (1 online resource.) |
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Collana |
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Korean studies of the Henry M. Jackson School of International Studies |
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Disciplina |
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Soggetti |
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HISTORY / Asia / Korea |
Letter writing, Korean |
Korean letters |
Calligraphy, Korean - Choson dynasty |
Calligraphy, Korean - History - Chosŏn dynasty, 1392-1910 |
Letter writing, Korean - History |
Korean letters - History and criticism |
History |
Criticism, interpretation, etc. |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Nota di contenuto |
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Prologue: A Story of Letter Writing in Twenty-First-Century Korea -- Letter Writing in Korean Written Culture -- The Rise and Fall of a Spatial |
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Genre -- Letters in Korean Neo-Confucian Tradition -- Epistolary Practices and Textual Culture in the Academy Movement -- Social Epistolary Genres and Political News -- Contentious Performances in Political Epistolary Practices -- Epilogue: Legacies of the Chosŏn Epistolary Practices. |
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Sommario/riassunto |
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"Focusing on the ways written culture interacts with philosophical, social, and political changes, The Power of the Brush examines the social effects of an "epistolary revolution" in sixteenth-century Korea and adds a Korean perspective to the evolving international discourse on the materiality of texts. It demonstrates how innovative uses of letters and the appropriation of letter-writing practices empowered cultural, social, and political minority groups: Confucians who did not have access to the advanced scholarship of China; women using vernacular Korean script, who were excluded from the male-dominated literary culture, which used Chinese script; and provincial literati, who were marginalized from court politics. The physical peculiarities of new letter forms such as spiral letters, the cooptation of letters for purposes other than communication, and the rise of diverse political epistolary genres combined to form a revolution in letter writing that challenged traditional values and institutions. New modes of reading and writing that were developed in letter writing precipitated changes in scholarly methodology, social interactions, and political mobilization. Even today, remnants of these traditional epistolary practices endure in media and political culture, reverberating in new communications technologies"-- |
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