• Title/Summary/Keyword: 김택영

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원통형 연소실내 분무된 액적군의 화염전파에 관한 수치해석

  • 이영집;백승욱;김택영
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.14 no.4
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    • pp.899-906
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    • 1990
  • 본 연구에서는 자동차엔진에 대한 응용의 일환으로써 밀폐된 축대칭 연소실내 의 정지하고 있는 공기에 분사에 의해 형성된 분무액적들을 점화원을 이용하여 화염을 생성시키고 그에 따른 화염전파 및 낮은 마하수에서의 유동현상과 이상간의 물리적 관 계를 다차원 유한차분법에 의한 물리적인 지배방정식의 동시해법인 ALE(Arbitrary La- ngrangian Eulerian)방법으로 구성되어 있는 CONCHAS-code를 이용하여 해석하고, 연료 액적의 분사각도, 크기 및 연소실내 기체유동의 각속도의 변화에 의한 분무연소의 과 도적특성을 고찰하고자 한다.

Impact of Corporate Characteristics on Personal Information Breach Accident (기업의 특성이 개인정보 유출 사고에 미치는 영향)

  • Kim, Taek-Young;Kim, Tae-Sung;Jun, Hyo-Jung
    • Journal of Information Technology Services
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    • v.19 no.4
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    • pp.13-30
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    • 2020
  • Not only does it cause damage to individuals and businesses due to the occurrence of large-scale personal information leakage accidents, but it also causes many problems socially. Companies are embodying efforts to deal with the threat of personal information leakage. However, it is difficult to obtain detailed information related to personal information leakage accidents, so there are limitations to research activities related to leakage accidents. This study collects information on personal information leakage incidents reported through the media for 15 years from 2005 to 2019, and analyzes how the personal information leakage incidents occurring to companies are related to the characteristics of the company. Through the research results, it is possible to grasp the general characteristics of personal information leakage accidents, and it may be helpful in decision making for prevention and response to personal information leakage accidents.

Analysis of Combined Conductive and Radiative Heat Transfer in a Two-Dimensional Rectangular Enclosure Using the Discrete Ordinates Method (구분종좌법에 의한 사각형매질내의 복사 및 전도열전달 해석)

  • 김택영;백승욱
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.15 no.1
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    • pp.341-348
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    • 1991
  • An efficient tool to deal with a multi-dimensional radiative heat transfer is in strong demand to analyze various thermal problems combined either with other modes of heat transfer or with combustion phenomena. The current study examined the discrete ordinates method (DOM) for a coupled radiative and conductive heat transfer in rectangular enclosures in which either nonscattering or scattering medium is present. The results were compared with the other benchmarked approximate solution. The efficiency and accuracy of the DOM were thus validated.

Studies on the Constituents of the Chicory Root (치코리뿌리 성분(成分)에 관(關)한 연구(硏究))

  • Kim, Taik-Young;Yoon, Young-Jin;Lee, Kyung-Woong
    • Korean Journal of Food Science and Technology
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    • v.10 no.2
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    • pp.258-262
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    • 1978
  • Proximate composition, minerals and fatty acid in dried chicory root (moisture content 7.0%) are analyzed and subsequent results are as follows: Crude protein, crude fat, crude fiber, total sugar and ash content in chicory root are 8.6%, 1.6 %, 6.9%, 58.5% and 4.2%, respectively. Mineral content of Ca, P, Fe, Mg and Si in the root are 1,560, 180, 10,600 and 180 mg%, respectively. Other minerals such as K, Na, Al, Zn, Ag, Cu and Ti are also determined. Unsaturated fatty acid content in total fat of the root is 65.4%, Particularly high in linoleic acid. Uridine-5'-diphospho-glucose, as sole nucleotide-sugar in the root, was detected.

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Analysis on the thermal development of radiatively participating pipe flow with nonaxisymmetric convective heat loss (비축대칭 대류열손실 경계조건하에서 원관내 복사에 관여하는 매질의 층류 열적 발달의 수치해석)

  • ;;Baek, Seung-Wook
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.19 no.11
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    • pp.2995-3002
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    • 1995
  • The cooling problem of the hot internal pipe flow has been investigated. Simultaneous conduction, convection, and radiation were considered with azimuthally varying convective heat loss at the pipe wall. A complex, nonlinear integro-differential radiative transfer equation was solved by the discrete ordinates method (or called S$_{N}$ method). The energy equation was solved by control volume based finite difference technique. A parametric study was performed by varying the conduction-to-radiation parameter, optical thickness, and scattering albedo. The results have shown that initially the radiatively active medium could be more efficiently cooled down compared with the cases otherwise. But even for the case with dominant radiation, as the medium temperature was lowered, the contribution of conduction became to exceed that of radiation.n.

A Scenario Development on the Personal Information Breach in Telemedicine Service (원격의료 서비스의 개인정보 침해 시나리오 개발)

  • Choi, Hyun-Wook;Kim, Taek-Young;Kim, Tae-Sung
    • Proceedings of the Korea Information Processing Society Conference
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    • 2021.11a
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    • pp.301-304
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    • 2021
  • 4차 산업혁명 시대가 도래함에 따라 사물인터넷(IoT)이 다양한 산업의 영역에서 활용되고 있다. 특히 IoT 기술 및 서비스를 활용하는 분야 중 하나인 스마트 의료 분야는 최근 소프트웨어 및 네트워크의 연결성이 강화되면서 사이버보안 사고가 급증하고 있다. 따라서 스마트 의료 기기·서비스 개발단계부터 보안을 고려하여 안전하게 개발하는 것이 필요하며, 서비스 제공시에도 보안을 고려하여 안전하게 관리 및 서비스를 제공하는 것이 필요하다. 이에 본 연구에서는 IoT 서비스 활용 분야 중 스마트 의료 분야에서 원격의료 서비스의 개인정보 침해 요인을 도출하고 이를 토대로 어택트리 기반의 시나리오 분석을 수행하고자 한다.

Kim Taek-yeong's Return to Korea in 1909 and Scholar Byeoksu in a Pavilion by An Jung-sik (김택영(金澤榮)의 1909년 귀국(歸國)과 안중식(安中植) 필(筆) <벽수거사정도(碧樹居士亭圖)>)

  • Kang, MinKyeong
    • MISULJARYO - National Museum of Korea Art Journal
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    • v.99
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    • pp.30-49
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    • 2021
  • Scholar Byeoksu in a Pavilion by An Jung-sik (1861-1919; sobriquet: Simjeon) was first shown to the public in the exhibition Art of the Korean Empire: The Emergence of Modern Art at the National Museum of Modern and Contemporary Art, Deoksugung. This painting bears poems and inscriptions composed by Kim Taek-yeong (1850-1927; sobriquet: Changgang) and written by Kwon Dong-su (1842-?; sobriquet: Seokun). A rare example of an actual-view landscape painting by An Jung-sik, this painting is significant in that it depicts upper-class houses in Seoul in the early twentieth century. More importantly, it demonstrates an association among intellectuals of the time. Yun Deok-yeong (1873-1940; sobriquet: Byeoksu), who asked An Jung-sik to create this painting, was an uncle of Empress Sunjeonghyo (1894-1966), the consort of Emperor Sunjong. He was one of the most prominent collaborators who promoted the Japanese colonization of Korea. When Emperor Sunjong bestowed Yun Deok-yeong with a hanging board with an inscription reading "Scholar Byeoksu in a Pavilion," Yun requested the production of this painting to mark the event. Kim Taek-yeong, a master of Chinese literature during the late Korean Empire period, sought asylum in Nantong, Jiangsu Province in China with his family a month before the Protectorate Treaty was signed between Korea and Japan in 1905. In 1909, he returned to Korea. His decision to return was greatly influenced by Yun Deok-yeong and Yi Jae-wan (1855-1922). Upon his return, Kim Taek-yeong intended to gather materials for publishing a history book. Also, Kim continuously met his old acquaintances, made new friends, and socialized with them. He built relationships with people from various backgrounds, including those living in regions like Gurye, and even in other countries like Japan. This indicates that intellectuals of the time were still forming networks through poems and prose regardless of their political inclination, social rank, or nationality. Scholar Byeoksu in a Pavilion is of great value in that it shows an aspect of the intellectual exchanges among the learned people of the late nineteenth and early twentieth centuries.