• Title/Summary/Keyword: SHEDs

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FRACTIONAL STEP METHOD COMBINED WITH VOLUME-OF-FLUID METHOD FOR EFFICIENT SIMULATION OF UNSTEADY MULTIPHASE FLOW (비정상 다상유동의 효율적 수치모사를 위한 VOF가 적용된 Fractional Step 기법)

  • Lee, Kyong-Jun;Yang, Kyung-Soo;Kang, Chang-Woo
    • Journal of computational fluids engineering
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    • v.15 no.4
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    • pp.99-108
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    • 2010
  • Fractional Step Methods(FSM) are popular in simulation of unsteady incompressible flow. In this study, we demonstrate that FSM, combined with a Volume-Of-Fluid method, can be further applied to simulation of multiphase flow. The interface between the fluids is constructed by the effective least squares volume-of-fluid interface reconstruction algorithm and advected by the velocity using the operator split advection algorithm. To verify our numerical methodology, our results are compared with other authors' numerical and experimental results for the benchmark problems, revealing excellent agreement. The present FSM sheds light on accurate simulation of turbulent multiphase flow which is found in many engineering applications.

An Art of Arbitration:Dispute Resolutions in Shakespeare's The Merchant of Venice

  • Yeon, Jeom-Suk
    • International Commerce and Information Review
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    • v.7 no.4
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    • pp.457-466
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    • 2005
  • The main narrative of Shakespeare's The Merchant of Venice deals with a dispute over the matter of bond in regard to moneylending, and its consequences upon the eventual default. Only the clever interference of a lawyer or judge brings the crisis to an end. In solving his dispute over the bond between Antonio, the merchant of Venice, and Shylock, the money lender and a Jew, Shakespeare offers one of the most famous trial scenes in literature. This trial scene presents the art of arbitration by Portia who was disguised as a Doctor of Law and sheds light on the nature of law, justice, equity, and divine law. What one cannot overlook in this trial scene is the importance of reading ability. After all, interpretation is the next stage of reading. Drawing just verdicts and wise arbitration while at the same time deconstructing the implicit violence and incongruity in law is based on ceaseless effort of analytic and creative act of reading.

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Sensory Engineering Model in Search of Emotion-Specific Physiology -An Introduction and Proposal (정서특정적 생리의 탐색을 모색하는 감성공학의 패러다임과 실천방법)

  • 우제린
    • Science of Emotion and Sensibility
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    • v.4 no.2
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    • pp.1-13
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    • 2001
  • Emotion-Specific Physiology may still remain to bean elusive entity even to many of the proponents and seekers, but an ever-growing body of experimental evidence sheds much brighter prospects for the future researches in that direction. Once such Emotion-Physiology pairs are identified, there exist a high hope that some Sense-Friendly Features that are causally related, or highly correlated, to each pair may be identifiable in the nature or man-made objects. On the premise that certain emotions, if and when engendered by a consumer good, may be conducive to an urge “to own or to identify oneself with the product”, presented here is a model of Sensory Engineering that is oriented objectively towards identifying the Emotion-Specific Physiology in order to have the Sense-Friendly Features reproduced in product designs. Relevant and complementary concepts and some suggested procedures in implementing the proposed model are offered.

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Flow Characteristics of the Main Nozzle with different Acceleration Tube and Diameter in an Air-Jet Loom (에어젯트 직기에서 가속관 직경변화에 따른 주노즐의 유동특성)

  • Jeong, S.Y.;Kim, K.H.
    • Journal of ILASS-Korea
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    • v.8 no.2
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    • pp.16-23
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    • 2003
  • The Air-jet loom represents a major step in the development of shutterless weaving due to its ability to weave a wide range of yarns at high speeds. The Air-jet weaving involvers, inserting a pre-measured length of yam through the wrap, is sheds by meads of compressed air. The analysis of air flow characteristic of the main nozzle and acceleration tube is required for the loom performance. h this paper We examined the effect of the main nozzle with different acceleration tubes as well as diameters. And also, we compared the performance of straight type tube with laval type tube and of according to be suction hole on the acceleration tube, respectively.

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3D-QSAR Study of Melanin Inhibiting (S)-(+)-Decursin and its Analogues by Pharmacophore Mapping

  • Lee, Kyeong;Jung, Sang-Won;Naik, Ravi;Cho, Art E.
    • Bulletin of the Korean Chemical Society
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    • v.33 no.1
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    • pp.149-152
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    • 2012
  • The (S)-(+)-decursin and its analogues are reported as potent inhibitors of melanin production in B16 murine melanoma cells. In order to understand the factors responsible for potency as well as inhibition of potency of (S)-(+)-decursin and its analogues, three-dimensional quantitative structure-activity relationship (3D-QSAR) studies were performed. Since receptor structures are not available, a pharmacophore model was constructed. Using PHASE, we generated 3 different models and selected the seven-site model, which returned excellent statistical values ($r^2$ = 0.9127, $Q^2$ = 0.6878, Pearson-R = 0.9014). Using the generated pharmacophore model, we screened a natural products library and obtained 4'-epi-decursin as the most related compound. 4'-epidecursin is similar to (S)-(+)-decursin, but shows additional interaction possibilities with tyrosinase. The study thus sheds some light on possibility of developing more potent tyrosinase inhibitors.

Development of a Cell-based Long-term Hydrologic Model Using Geographic Information System(III) - Data Construction and Model Application - (지리정보시스템을 이용한 장기유출모형의 개발(III) -자료의 구축 및 모형의 적용-)

  • 정하우;최진용;김대식
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.39 no.3
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    • pp.52-63
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    • 1997
  • A CELTHYM(CEll-based Long-Term HYdrologic Model), a pre-processor and a post processor that can be integrated with geographic information system ( GIS) were developed to predict the stream flow of the small watershed. The CELTHYM was calibrated and verified with measured runoff data at the WS # 1 and WS # 3 that are testing water sheds of Seoul Nat' 1 Univ., dept. of agricultural engineering, in Ansan city, Kyunggi province, South Korea. The results of tests are in good agreement with measured data and usable for other application, but the component of direct runoff and water balance on paddy fields need more study.

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Why Tall Buildings? The Potential of Sustainable Technologies in Tall Buildings

  • Elbakheit, Abdel Rahman
    • International Journal of High-Rise Buildings
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    • v.1 no.2
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    • pp.117-123
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    • 2012
  • This paper discusses major strengths of tall buildings that distinguish them as sustainable solutions for the built environment. It sheds light on some of the key attributes of tall buildings as well as materials and technologies that could boost their performance environmentally, economically and technically as well as the natural habitats containing them. Tall buildings are portrait as major successful options for accommodating the ever increasing urban world population, with little negative impact on ecologies and environmental habitats worldwide. The role of tall buildings as 'vertical garden sub-cities' mitigating modern city problems of 'urban heat islands' and sprawling cities is explored. A few building examples as well as city developments are presented which represent the new generation of sustainable tall buildings that are setting trends for future projects incorporating innovations in materials and building systems and designs.

Rail Road Electric Traction System (철도 전기 시스템)

  • Gopal, Devarajan;Lho, Young-Hwan;Kim, Yoon-Ho
    • Proceedings of the KSR Conference
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    • 2006.11b
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    • pp.646-658
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    • 2006
  • In this paper, the details of electric traction voltages which are widely used for metro and mainline trains are presented. The problems encountered in catenaries, pressure of the pantograph pan, catenary contact cross sectional area, materials etc are well covered. Catenary height from the rail for main line, bridges, sheds etc is discussed. The catenary running details and switching of one catenary to another are explained. The dead zones in 3 phase grid as well as in DC are presented here. The pantograph structure, blades, shoes etc. for AC/DC EMUs are dealt. The schematic diagram for electrification systems used for railways are given and explained with typical electrical parameters of Indian Railways.

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An Integrative Framework of the Determinants for the Emergence of a Next-Generation Dominant Display

  • Yoon, Inhwan
    • Journal of Information Technology Applications and Management
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    • v.24 no.3
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    • pp.107-123
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    • 2017
  • This study uses the concept of dominant design to identify the determinants for the emergence of a next-generation dominant electronic display. It employs multiple research methods with the participation of display experts, which combine case studies, an unstructured interview, and the Delphi method. The results show that based on technological innovation and market dominance, a next-generation dominant display is more likely to emerge as a result of technological competition between liquid crystal displays (LCDs) and organic light-emitting diodes (OLEDs). The findings emphasize that the importance of rapid technological innovation, including component and process innovations, and a competitive edge in manufacturing costs are important. The study sheds light on our understanding of dominance in an industry and market, and also provides strategic guidance for practitioners to establish a competitive strategy.

An Expert System on Local Load Shedding with Priority (우선도를 고려한 지역부하 차단에 관한 전문가시스템)

  • Yoon, Yong-Han;Rim, Seong-Jeong;Han, Soung-Ho;Kim, Jae-Chul
    • Proceedings of the KIEE Conference
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    • 1993.07a
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    • pp.70-72
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    • 1993
  • This paper presents an expert system that sheds loads considering priority in the localized SCADA power systems during an emergency states. The proposed algorithm uses neural networks to detect local load shedding location and heuristic rules to determine load shedding amounts. The proposed expert system is demonatrated at one of the model system which incorporates two localized SCADA power system. It is operated under workstation.

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