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      • KCI등재후보

        Korean Learners’ L2 Performance in Syntax-Semantics interface : Chinese Wh-Words as Existential Polarity Words

        Chen Hui,You, Seok-Hoon 고려대학교 언어정보연구소 2018 언어정보 Vol.26 No.-

        Chen Hui & You, Seok-Hoon. 2018. Korean Learner’s L2 Performance in Syntax-Semantics interface: Chinese Wh-words as Existential Polarity Words. Language Information. Volume 26. 103-128. This study aims to test applicability of the Interface Hypothesis (Sorace & Tsimpli, 2006) in L2 through investigating L2 acquisition of Chinese Wh-Words as Existential Polarity Words (hence force EPWs) by L1 Korean speakers. The present study compares the results of the acceptability judgment test of Chinese EPWs between learner group and native speaker group to investigate 1. Are the interface properties concerning Chinese EPWs and their licensors acquirable by Korea-speaking learners of Chinese? 2. If not, what are the linguistic or non-linguistic effects which cause the interface breakdown? The results show that L2 Chinese learners are unable to establish a complete semantics-syntax relationship with the EPW embedded in the sentence, even at the final state of L2 acquisition. And the results also show that L2 Chinese acquisition is not linear development.

      • 비선호시설 입지정책의 수용성에 관한 고찰

        서휘석,윤정현 원광대학교 대학원 2007 論文集 Vol.38 No.-

        It is widely recognised that the local acceptability often poses a barrier towards in location policy of the hazardous facilities, where oppositions typically characterized by the NIMBY(not in my back yard) concept. The objectives of this article is to provide a theoretic model of the location policy of hazardous facilities. Nine variables are identified, summarized and criticised. First, The factors of policy driving consist of fairness of policy, capability of policy driving, transparency of policy, PR activity of policy, Second, The factors of policy recipient consist of trust of government, participation of policy, recognition of hazardous facility. Third, The common factors consist of degree of communication, degree of compensation. Finally, In order to improve the acceptability of policy, The government try to improve the factors of policy, the factors of policy recipient and common factors.

      • KCI등재후보

        한국 학생들의 영어 어두자음 발화학습에 관한 실험 연구

        강석근,이희천 서울대학교 어학연구소 2002 語學硏究 Vol.38 No.1

        The purpose of this paper is to examine through experiment if Korean students can learn sounds like /r/, /f/, /b/ and /v/ precisely, sounds which Korean does not contain, and to discover methods whereby this learning may be accomplished. To this end, we prepared two kinds of test materials with 30 questions each, consisting of pairs with /l, r/, /f, p/, and /b, v/ in word-initial positions. In the tests, 40 third-year students from Janghang Technical High School served as subjects. The subjects were divided into two groups: an experimental group and a control group. The tests consisted of two steps. First, we examined each group's pronunciation ability of the above consonants in word-initial positions. Next, after teaching the experimental group the differences between the consonants above with special programs, we examined their degree of improvement. The results showed that the pronunciation ability of the experimental group improved more than that of the control group. In conclusion, although most of the subjects of the control group had difficulty in pronouncing the sounds that Korean does not contain, they improved their pronunciation ability to some degree by learning the place and manner of articulation, and through reetitive practice.

      • 지방정부 민원행정서비스 평가의 의의와 측정모형

        서휘석,이동기 全北行政學會 2003 全北行政學報 Vol.17 No.1

        고객지향적인 개념의 행정 접근은 이제 중요한 항목으로 받아들이고 있다. 특히 지방자치제가 도입된 이후 그 정도나 내용은 더욱 크게 주목받고 있다. 그 중 민원서비스 부문에 대한 관심은 지방정부의 민원프로그램의 개발과 운영, 서비스 접목 등에 집중되고 있다. 이러한 현상은 지방정부의 근본적인 형태가 지역주민에 바탕을 두고 있으며 이를 통하여 행정의 변화를 이끌어 내기 위한 노력을 하고 있다는 것을 확인할 수 있다. 민원행정서비스의 질과 그 제공 절차에 대한 시민의 인식은 정책의 지속성 유지뿐만 아니라 수혜자인 시민의 삶의 질에 결정적인 영향을 미친다고 보았을 때 그 중요성은 더욱 크다고 볼 수 있다. 따라서 본 연구는 지방정부의 민원행정서비스에 대한 평가의 의의와 측정모형에 대한 초점을 둔다. 민원행정서비스에 대한 평가모델은 시민들과의 직접적인 관계를 형성할 뿐만 아니라 행정의 변화를 느끼게 하는 중요한 창구이고 의사소통의 채널이기 때문이다.

      • 자동차용 실리콘 가속도센서의 개발(Ⅱ)

        이종현,신장규,이상룡,천희곤,조찬섭,심준환,류인식,박석홍,허정준,박기열 경북대학교 센서기술연구소 1994 연차보고서 Vol.1994 No.-

        자동차의 air-bag 장치에 실용될 수 있는 압저항형 단결정 실리콘 가속도센서 칩을 개발하기 위하여 결정 실리콘 미세구조의 제조방법을 확립하고, 단위공정의 검증을 통하여 일괄공정에 의한 PROTO-TYPE 칩을 만드는 기술을 연구하였다. 단결정 실리콘 미세구조는 선택확산법을 이용하여 정확히 선택된 영역에만 air-gap을 형성하여 미세구조의 측면식각을 방지하는 선택확산법에 의한 실리콘 마이크로머시닝 기술로 제조하였다. 일괄공정을 위한 단위공정확립을 위하여 PROTY-TYPE 8빔 브릿지형 가속도 센서를 제조하였다. 제조된 칩의 가속도에 따른 출력전압은 선형성을 나타내고 있으며, 감도는 약 50 ㎶/V·g로 나타났다. 이 감도는 50G용 가속도센서의 사양을 만족하지 못했다. 이는 공정에 의한 문제라기 보다는 가속도센서의 시뮬레이션에 의해 설계한 구조가 이미 원하는 감도에 못 미친다는 것으로 생각된다. 따라서 2차 공정으로 제조될 가속도센서의 파라미터를 SuperSAP 유한요소 패키지를 이용하여 실리콘 미세구조부의 파라미터에 따른 특성을 시뮬레이션하였다. 설계된 50G용 가속도센서의 mass Pad의 반경 및 빔 길이, 빔 폭, 빔 두께, 그리고 mass의 각 파라미터 값은 700 ㎛, 120 ㎛, 5 ㎛, 1.0 ㎎ 이었다. 반도체 공정기술, 관성질량 제조법 및 선택확산을 이용한 마이크로머시닝을 사용하여 일괄공정으로 8빔 브린지형 가속도센서를 제조하였다. We researched the establishment of the silicon microstructure fabrication technique to develop a piezoresistive type silicon acceleration sensor chip and the technique to make a proto-type chip by the verification of the unit-process. Silicon microstructure is fabricated silicon micro-machining by selective diffusion method. This method prevent a side-etching of microstructure because selective diffused region is only formed an air-gap. We fabricated a proto-type 8-beam bridge-type acceleration sensor to establish the unit-process for the batch-process. The output voltage of the chip represented linearity with acceleration, and the sensitivity was about 50 ㎶/V·g. But this sensitivity dosen't satisfy the requirements of a practical acceleration sensor. The cause of this result is assumed not process problem, but the structure designed by simulation isn't suitable already. Threfore, the characteristics of parameters of the acceleration sensor that will be fabricated by 2nd-process is simulated by SuperSAP finite-element package. The determined parameter values of beam length, beam width, beam thickness, mass, and mass radius are 120 ㎛, 5 ㎛, 1.0 ㎎, and 700 ㎛, respectively. We fabricated 8-beam bridge-type acceleration sensor by batch-process using a semiconductor process technique, proof-mass fabrication method, and micromachinig using selective diffusion.

      • SCIESCOPUSKCI등재
      • SCIESCOPUSKCI등재

        Application of SFCL on Bus Tie for Parallel Operation of Power Main Transformers in a Fuel Cell Power Systems

        Hui-Seok Chai,Byoung-Wook Kang,Jin-Seok Kim,Jae-Chul Kim 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.6

        In the power plant using high temperature fuel cells such as Molten Carbonate Fuel Cell(MCFC), and Solid Oxide Fuel Cell(SOFC), the generated electric power per area of power generation facilities is much higher than any other renewable energy sources. - High temperature fuel cell systems are capable of operating at MW rated power output. - It also has a feature that is short for length of the line for connecting the interior of the generation facilities. In normal condition, these points are advantages for voltage drops or power losses. However, in abnormal condition such as fault occurrence in electrical system, the fault currents are increased, because of the small impedance of the short length of power cable. Commonly, to minimize the thermal-mechanical stresses on the stack and increase the systems reliability, we divided the power plant configuration to several banks for parallel operation. However, when a fault occurs in the parallel operation system of power main transformer, the fault currents might exceed the interruption capacity of protective devices. In fact, although the internal voltage level of the fuel cell power plant is the voltage level of distribution systems, we should install the circuit breakers for transmission systems due to fault current. To resolve these problems, the SFCL has been studied as one of the noticeable devices. Therefore, we analyzed the effect of application of the SFCL on bus tie in a fuel cell power plants system using PSCAD/EMTDC.

      • Combustion Characterization according to Accelerated Deterioration Temperature of a Non-class 1E Cable

        Seok Hui Lee,Min Ho Kim,Seung Yeon Jeong,Sang Kyu Lee,Ju Eun Lee,Min Chul Lee 한국화재소방학회 2022 International Journal of Fire Science and Engineer Vol.36 No.1

        In this study, the temperature effect of accelerated deterioration on combustion characteristics was investigated when accelerating aging a non-class 1E cable for nuclear power plants. The accelerated aging of 40 years was conducted under five temperature conditions of 90 °C, 100 °C, 110 °C, 130 °C and 150 °C. In the early period of combustion when the first peak of the heat release rate emerged, the heat release of the non-aged cable exhibited the largest peak value of 225 kW/㎡ while the heat release of the aged cables exhibited a comparatively low first peak value. The first peaks of aged cables decreased as the temperature condition increased. This tendency is considered to emerge from the thermal decomposition and destabilization of long-chained polymer structure when the sheath and insulation of cables are exposed to a thermal degradation environment. Hence, this loosening of the chemical bond and its decomposition severely affected the degradation of the flame retardant performance. In particular, in the combustion characteristics for the aged cables under temperature conditions of 100 °C or higher, the first peak value of the heat release rate did not exceed 200 kW/㎡. In the middle period of combustion, the heat release rates of both the non-aged and the aged cables were kept constant at approximately 25-30 kW/㎡ without significant change. In the later period of combustion, the second heat release peaks emerged for only non-aged, 90 °C and 100 °C cables because the cables aged under low temperature conditions (90 °C and 100 °C) maintained a certain level of flame retardant performance while those aged above 100 °C did not. Therefore, it can be considered that the higher accelerated deterioration temperature triggers the higher degradation of the flame retardant performance, and 100 °C is a critical temperature that involves the significant degradation effect.

      • KCI등재

        Analysis of blocking characteristics for each type of superconducting wire to reduce the breaking time of DC circuit breakers

        Hui-Seok Gu(구희석),Sang-Yong Park(박상용),Hye-Won Choi(최혜원),Hyo-Sang Choi(최효상) 대한전기학회 2021 전기학회논문지 Vol.70 No.6

        DC cutoff must be completed within a few ms. Therefore, this paper derives the optimal superconducting wire winding method for efficient current limiting and fast execution of the blocking operation. First, the electromagnetic field characteristics of the superconducting wire according to the winding type were analyzed using the Maxwell program. After that, the EMTDC/PSCAD program was used to analyze the DC blocking performance according to the winding type. Based on the simulation results, as a result of the DC cut-off experiment for each winding type, the spiral type superconductor has a higher resistance rise curve than the helical type, so it is possible to limit the current efficiently by up to 4.01%. In addition, as the magnetic field characteristics are high, the quench of the superconductor operates quickly and the operation time of the circuit breaker is shortened by 0.19 ms, so it can be confirmed that the blocking completion time is also reduced by 0.25 ms.

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