유원시설 내 유희용전차의 설치규정 및 국내 적용실태 분석

김한상,배석명,방선배,이건호,김기현,김종민,Kim, Han-Sang,Bae, Suk-Myong,Bang, Sun-Bae,Lee, Gyun-Ho,Kim, Gi-Hyun,Kim, Chong-Min 한국조명전기설비학회 2004 조명·전기설비학회논문지 Vol.18 No.6

Amusement electric train which is a kind of fun rides in amusement parks is prescribed by the provision of article 252 of the technical standards of the MOCIE(Ministry of Commerce, Industry and Energy) notification. The technical standards which is prescribed on the basis of Japanese technical standards is minimum compulsory standards in Korea. But these early standards can not be correctly applied for current condition of well-developed technical environment In order to improve the early standards, this paper will suggest a reform plan of the current technical standards by means of analyzing actual applied conditions and examining 28 amusement electric trains in Korea 유희용전차는 유원시설 내에 설치된 놀이기구의 일종으로 산자부고시인 전기설비기술기준 제252조에서 별도로 규정하고 있다. 전기설비기술기준은 법적 최소요건으로 일본의 전기설비기술기준령을 토대로 제정된 이후 기술적 환경의 변화에 신속하게 대응하지 못함에 따라 유희용전차의 시설에 관한 규정에 있어서도 현실적인 문제점이 많이 내포되어 있다. 따라서, 본 논문에서는 이와 같은 현장 적용상의 기술적 문제점을 해결하기 위하여 전국에 있는 28개의 유희용전차를 대상으로 현장 적용실태 분석 및 실측을 통하여 현행 전기설비기술기준의 개선방안을 제시하였다.

플라즈마 표면처리가 TiO₂/TiO_2-x 저항 변화형 메모리에 미치는 영향

김한상,김성진,Kim, Han-Sang,Kim, Sung-Jin 한국전기전자재료학회 2020 전기전자재료학회논문지 Vol.33 No.6

In this study, a TiO₂/TiO_2-x-based resistance variable memory was fabricated using a DC/RF magnetron sputtering system and ALD. In order to analyze the effect of oxygen plasma treatment on the performance of resistance random access memory (ReRAM), the TiO₂/TiO_2-x-based ReRAM was evaluated by applying RF power to the TiO_2-x oxygen-holding layer at 30, 60, 90, 120, and 150 W, respectively. The ReRAM was fabricated, and the electrical and surface area performances were compared and analyzed. In the case of ReRAM without oxygen plasma treatment, the I-V curve had a hysteresis curve shape, but the width was very small, with a relatively high surface roughness of the oxygen-retaining layer. However, in the case of oxygen plasma treatment, the HRS/LRS ratio for the I-V curve improved as the applied RF power increased; stable improvement was also noted in the surface roughness of the oxygen-retaining layer. It was confirmed that the low voltage drive was not smooth due to charge trapping in the oxygen diffusion barrier layer owing to the high intensity ReRAM applied with an RF power of approximately 150 W.

용액 공정을 이용한 IZO 트랜지스터의 전기적 성능에 대한 박막 두께의 영향

김한상,경동구,김성진,Kim, Han-Sang,Kyung, Dong-Gu,Kim, Sung-Jin 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.8

We investigated the effect of different thin-film thicknesses (25, 30, and 40 nm) on the electrical performance of solution-processed indium-zinc-oxide (IZO) thin-film transistors (TFTs). The structural properties of the IZO thin films were investigated by atomic force microscopy (AFM). AFM images revealed that the IZO thin films with thicknesses of 25 and 40 nm exhibit an uneven distribution of grains, which deforms the thin film and degrades the performance of the IZO TFT. Further, the IZO thin film with a thickness of 30 nm exhibits a homogeneous and smooth surface with a low RMS roughness of 1.88 nm. The IZO TFTs with the 30-nm-thick IZO film exhibit excellent results, with a field-effect mobility of $3.0({\pm}0.2)cm^2/Vs$, high Ion/Ioff ratio of $1.1{\times}10^7$, threshold voltage of $0.4({\pm}0.1)V$, and subthreshold swing of $0.7({\pm}0.01)V/dec$. The optimization of oxide semiconductor thickness through analysis of the surface morphologies can thus contribute to the development of oxide TFT manufacturing technology.

무대조명설비의 전기안전

김한상,Kim, Han-Sang 대한산업안전협회 2003 안전기술 Vol.67 No.-

화공플랜트 엔지니어링에서의 건축엔지니어의 역할

김한상,Kim, Han-Sang 한국공간구조학회 2011 한국공간구조학회지 Vol.11 No.2

무대조명설비의 전기안전

김한상,Kim, Han-Sang 대한산업안전협회 2003 안전기술 Vol.68 No.-

초고층건물의 풍응답제어를 위한 스마트 TMD의 퍼지 하이브리드제어

김한상,김현수,Kim, Han-Sang,Kim, Hyun-Su 한국전산구조공학회 2009 한국전산구조공학회논문집 Vol.22 No.2

본 연구에서는 초고층건물의 풍응답을 저감시키기 위하여 스마트 TMD(STMD)를 활용한 퍼지 하이브리드 제어기법을 제안하였다. 효과적인 제어알고리즘을 개발하기 위하여 STMD의 응답저감에 우수한 성능을 보이는 스카이훅(skyhook) 제어기와 구조물의 응답저감에 뛰어난 그라운드훅(groundhook) 제어알고리즘을 사용하였다. 본 연구에서는 두 제어기를 적절히 조합하기 위하여 최적의 가중치를 실시간으로 결정하는 퍼지 하이브리드 제어기를 개발함으로써 일반적인 가중합방식의 하이브리드 제어기법의 성능을 개선하였다 제안된 제어기의 성능을 검토하기 위하여 풍하중을 받는 76층 사무소 건물을 예제구조물로 사용하였다. MR감쇠기를 이용하여 STMD를 구성하였고, STMD의 제어성능을 평가하기 위하여 TMD및 ATMD의 성능과 비교하였다. 수치해석을 통하여 STMD의 제어성능이 TMD에 비하여 월등히 뛰어남을 확인할 수 있었다. 또한 퍼지 하이브리드 제어기법을 사용하면 스카이훅 및 그라운드훅 제어기를 효과적으로 조합하여 STMD와 건물의 응답을 동시에 줄일 수 있음을 확인하였다. Fuzzy hybrid control technique with a smart tuned mass damper(STMD) was proposed in this study for the suppression of wind-induced motion of a tall building. To develop the effective control algorithm for a STMD, skyhook and groundhook control algorithms were employed. Usually, skyhook controller can effectively reduce STMD motion and groundhook controller shows good control performance for the reduction of building responses. In this study, fuzzy hybrid controller, which can determine an optimal weighting factor for combining two controllers in real time, was developed to improve the control performance of conventional hybrid controller using weighted sum approach. A 76-story office building was used as an example structure to investigate the performance of the proposed controller. A magnetorheological(MR) damper was used to develop a STMD and the control performance of STMD was evaluated comparing with the passive and active TMD. The numerical studies show that the control effectiveness of a STMD is significantly superior to that of the conventional TMD. It is also shown that fuzzy hybrid controller can effectively adjust skyhook and groundhook control algorithms and reduce both responses of STMD and building.

이산형 형질에 대한 가족자료 연관성 검정법 FBAT와 형제 전달 불균형 연관성 검정법 S-TDT의 비교

김한상,오영신,송혜향,Kim, Han-Sang,Oh, Young-Sin,Song, Hae-Hiang 한국통계학회 2010 응용통계연구 Vol.23 No.6

광범위하게 사용되는 가족자료에 근거한 연관성 검정법 FBAT를 형제 전달 불균형 연관성 검정법 S-TDT와 비교하였고, 특히 형제간의 공분산을 고려한 분산추정량을 사용한 수정 S-TDT로써 유전연관성의 정도가 다른 가족자료가 검정통계량값으로 구분될 수가 있다. 모의실험으로 세 검정법을 비교한 결과, 형제의 표현형 자료가 서로 독립이 아닌 경우에 세 검정법 모두의 제 1종 오류가 정해진 유의수준보다 커지며, 또한 FBAT의 검정력이 S-TDT와 수정 S-TDT의 검정력에 미치지 못한다. FBAT 검정법에서 가정하는 조건이 검정법의 효율성에 미치는 영향을 더욱 심도있게 평가하는 연구가 요구된다. An extensively used approach for family based association test(FBAT) is compared with the sib transmission/disequilibrium test(S-TDT), and in particular the adjusted S-TDT, in which the covariance among related siblings is taken into consideration, can provide a more sensitive test statistic for association. A simulation study comparing the three test statistics demonstrates that the type I error rates of all three tests are larger than the prespecified significance level and the power of the FBAT is lower than those of the other two tests. More detailed studies are required in order to assess the influence of the assumed conditions in FBAT on the efficiency of the test.

원자층 증착 기술을 이용한 TiO_x 기반 TFT의 어닐링 효과

김한상,김성진,Kim, Han-Sang,Kim, Sung-Jin 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.8

We report on thin-film transistors based on $TiO_x$ pre-annealed by femtosecond laser pulses. A 30-nm thick $TiO_x$ active channel layer was initially deposited by an ALD system. The $TiO_x$ semiconducting films were annealed by irradiation with a femtosecond laser (power: $3W/cm^2$) for 5, 25, and 50s. Atomic force microscopy images revealed that the surface of a $TiO_x$ film without femtosecond laser pre-annealing was relatively rough, while after annealing with femtosecond laser pulses, the surface of the $TiO_x$ films became smooth. With increasing radiation time, the surrounding gas atmosphere could have a larger impact on the $TiO_x$ surface; meanwhile, the thin-film roughness decreased. Thin-film transistors with $TiO_x$ active channels pre-annealed at 50s exhibited good transfer characteristics and an on-to-off current ratio of ${\sim}10^3$.

스퀴시 형상 변경에 따른 DOHC 엔진에서의 압축 과정 유동 특성 해석

김한상,이경환(Han-Sang Kim),Kyung-Hwan Lee 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2

The numerical analysis on three-dimensional, unsteady in-cylinder flow of a DOHC spark-ignition engine has been applied to understand the in-cylinder flow patterns for three kinds of squish configurations. Calculations were carried out with CRI/TurboKiva, <br/> a commercial engine CFD code that can effectively solve the equations for transient chemically reactive fluid flows. The spatial structure and temporal evolution of in-cylinder flow fields during compression stroke have been investigated. The evolution of in-cylinder flow patterns for different squish configurations from IVC to spark timing was mainly discussed at specified crank angles. Mean velocity and turbulent kinetic energy level at the spark location were also obtained with respect to each crank angle. Through this study, it is possible to get the fundamental data involved in the in-cylinder flow structure and physical insight into the desirable squish flow patterns at spark timing for later combustion period.<br/>