338 research outputs found

    Experimental Study of Noise Reduction and Improved Cooling Fan Performance in a PDP TV

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    The present experimenral study addresses fan system noise reduction and improvement in cooling performance in a plasma display panel(PDP) television (TV), The broadband noisr in a PDP TV is closely related to system losses. The system losses, mainly due to rear case of the TV near the fan, are reducced by increasing the number of vent holes in the case, preventing secindary leajage flow between the fan and the case and modifying the reat case shape. The discrete noise is mainly related with the inflow conditions therefore, the removal of structures that distort inflow results in a discrete noise reduction. Additionally, the fan rotationg speed is reduced because of the increased flow rate and reduced flow fluctuaion, shich is obtained from the reduction of system loss(resistance). 7.3dB(A) noisr reduction and a 10% increase in flow rate are achieved. rhe manin concepts behind realizing noise reduction are prevention of recirculation flow around rhe fan and reduction of sysrem loss.. The author wish to acknowledge the financial wupport of LG Electronics, Inc., and useful discussions with Dr, Suk Kwan Kim at LG-PRC

    The Problem of Rhizomata in the Pre-socratic Period

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    Unlike the problems of Arche the Pre-socratic philosophers discussed the elements of the material world in the rhizomata questions. This article is divided into three main parts. The first part deals with the historical development of the problems of rhizomata proceeding in the order of pluralism, mechanism and teleology. In the second part we investigate the essential contents of rhizomata operating from Empedocles, Democritus and Anaxagoras. The causal principle took place in the transcendental and immanental sophistication, and at the same time the materialistic and the idealistic Weltanschauung have had their origin and their na?ve forms. Finally, in the third part, the contemporary significance is discussed in the light of Aristotle’s metaphysical point of view. The author tries here to raise some questions about the foundations of the oppositional atmosphere of the Materialism and the Idealism today, which seems to have their origin from the Pre-socratic period

    A Study on the Social Philosophy in the Period of the Republic of China

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    This study is divided into three main parts, and additionally includes an introduction, conclusion, footnotes and reference books. The first part deals with the historical development of the social philosophy in the period of the Republic of China. It begins from the revolutional ideology created by Dr. Sun Yat-sen in 1895, through the revolution in 1911, and ended in 1949, when the republic government escaped from mainland China to Taiwan on the one hand, it proppounded by scholars on the other. The second part examines the essential contents of the social principles, problems and praxis during this century. Finally in the third part the author attempts a critique on the values and the limitations of this study of the social philosophy in this period

    The Idea of the Philosophy of Education by Lao-tzu and Chuang-tzu

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    The purpose of the Taoist education is to create a perfect person. A perfect person means here "Ultimate man, Spirit-like man, Sage-minded man". The way to educate a man to be perfect by Lao-tzu is to "Convey his instructions without the use of speech".(行不言之教); for Chuang-tzu however is to use the Allegories(寓言之教). Both are the via negativa compared to the Confucian method, which seems to be via positiva. It is wellknown that both Tao-te-ching and the Book of Chuang-tzu use the way of negation, which denegates graduately their desires, their sensations, even their own existences in order to transcend themselves to unificate with Tao, the ultimate cosmic principle. The perfect man means here the man who engages union with Tao. Not just like the confucianits, who maintain the necessities of training all the virtues to cultivate oneself to be a saint or a sage, the Taoists bracket out of all particular virtues, make focus only in the "Union with Tao" as the only virtue. Here the "Union with Tao" has both the cosmological and ontological meaning. The author tries to explain the above-mentioned idea in three main parts. The first part deals with the historical development of the via negative from Laotzu to Chuang-tzu. The second part deepens its form to the essential contents of this educational idea. Finally, in the third part the contemporary meaning of the Taoist educational theory will be discussed

    Bibliometric profile of top-cited single-author articles in the Science Citation Index Expanded

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    [[abstract]]In this study, we identified and analyzed characteristics of top-cited single-author articles published in the Science Citation Index Expanded from 1991 to 2010. A top-cited single-author article was defined as an article that had been cited at least 1000 times from the time of its publication to 2012. Results showed that 1760 top-cited single-author articles were published in 539 journals listed in 130 Web of Science categories between 1901 and 2010. The top productive journal was Science and the most productive category was multidisciplinary physics. Most of the articles were not published in high-impact journals. Harvard University led all other institutions in publishing top-cited single-author articles. Nobel Prize winners contributed 7.0% of articles. In total, 72 Nobel Prize winners published 124 single-author articles. Single-authored papers published in different periods exhibited different patterns of citation trends. However, top-cited articles consistently showed repetitive peaks regardless of the time period of publication. “Theory (or theories)” was the most frequently appeared title word of all time. Leading title words varied at different time periods, and only five title words, method(s), protein(s), structure(s), molecular, and quantum consistently remained in the top 20 in different time periods

    Manipulation of an electron by photoirradiation in the electron-catalyzed cross-coupling reaction

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    Acknowledgments: We thank M. Akita (Tokyo Institute of Technology) and T. Koike (Nippon Institute of Technology) for discussions on a BDA photoredox catalysis. Funding: This work has been supported financially in part by JST CREST (JPMJCR18R4) . Author contributions: Conceptualization: E.S. Data curation: Y.O., K.Y., K.O., S.M., S.K.S., and M.A. Methodology: E.S. Investigation: Y.O., K.Y., K.O., S.M., S.K.S., and M.A. Funding acquisition: E.S. Project administration: E.S. Supervision: E.S., K.Y., and M.A. Writing- original draft: E.S. and K.Y. Writing - review and editing: E.S., K.Y., and M.A. Competing interests: The authors declare that they have no competing interests. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials

    Astronomical forcing of meter-scale organic-rich mudstone–limestone cyclicity in the Eocene Dongying sag, China: Implications for shale reservoir exploration

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    The middle Eocene Dongying sag in the Bohai Bay Basin of China has an estimated shale oil resource of approximately 1.1 billion t (8.06 billion bbl); flows of shale oil have been produced in the succession from tens of wells, where the daily production of a single well generally varies between 10 and 100 t (73.3–733 bbl). Therein, the mudrock successions composed of meter-scale mudstone–limestone couplets are the most important shale oil-producing layers. The controls on the deposition of the meter-scale mudstone–limestone couplets, however, remain enigmatic, constraining the analysis of lithofacies and, therefore, sweet spot distributions. Here, we analyze three continuously cored organic-rich successions of mudstone–limestone couplets (371 m [1217 ft] in total) in the middle Eocene Dongying sag, accompanied by decimeter- to meter-scale sampling and testing of mineralogy, organic geochemistry, and paleontology of the rocks. Our integrated cyclostratigraphic analysis shows that the observed mudstone–limestone couplets occur at periods that coincide with Milankovitch periodicities; 21-k.y. precession cycles are the main driver of the meter-scale mudstone–limestone couplets, with additional imprints of 41-k.y. obliquity cycles. Specifically, precession minima are associated with high summer insolation and consequently high summer monsoonal precipitation, which increased river discharge and terrigenous input to the basin, resulting in the deposition of siliciclastic-rich mudstones. In the study, low summer insolation during precession maxima led to decreased summer monsoonal precipitation, lower river discharge and terrigenous input, and increased lake water salinity, resulting in the deposition of authigenic lime mudstones. The shale reservoir quality kept pace with the orbital climate changes; compared with lime mudstones deposited during precession maxima, mudstones deposited during precession minima had higher total organic carbon, porosity, and oil content, but lower brittleness.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Applied Geolog
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