교육정상화를 위한 학벌사회의 해체에 관한 성인교육학적 연구

최항석 한국성인교육학회 2007 Andragogy Today : International Journal of Adult & Vol.10 No.2

본 연구에서는 포스트모던 지식기반사회의 골드칼라인력을 양성하기 위한 성인교육의 실현을 방해하는 장애로 학벌주의를 상정하고, 그 해체를 목적으로 수행되었다. 이를 위해 한국사회의 특별한 현상인 학벌주의의 현상을 베버의 이론에 근거한 지위집단이론과 르네 지라르의 포스트모던의 모방욕구이론, 그리고 스탠리 밀그램의 권위복종이론을 이종교배한 '지위집단적 학력모방욕구이론'을 중심으로 설명하였다. 또한 지위집단적 군중모방욕구이론을 내세워 학벌구조의 상층을 점유한 지위집단이 헤게모니 장악을 위해 이용한 교육적 이데올로기 기자재로 학교학과 대학수능시험, 그리고 들어가기는 어려우나 졸업하기는 너무나 쉬운 대학의 교육과정간의 상관관계를 라깡(Lacan)과 지젝(Zizek)의 신 정신분석학적 이론에 근거한 트리아데(Triade)로 설정하여 학벌사회의 정당성을 해체하고, 그 대안을 성인교육학적으로 제시하였다. The purpose of this study was to deconstruct the academic clique as an approach of Andragogy. It was assumed in this study that the academic clique obstructed the normalization of education and spoiled the nature of learning in post-modern society. In Korean society, what was required for one's success was not only one's ability but the academic clique, a faction which was formed based on academic background. It was wrongful to measure one's ability by the academic clique. Nevertheless it went with one's life as if it were one's inborn-status. Especially, we must prepared for the future society, it has to need that the HRD for Gold Collar worker. Many researchers had tried to study this phenomenon in order to break down it and they proposed alternatives. But those proposals were functional and were no more than technical substitutes. To deconstruct the academic clique society, this study began with a review of the 'New Status Group Theory' as the main theoretical framework, then, deconstruct the triade as the college entrance examination as the tacit premise which justified and maintained the academic clique, pedagogy which was justified by the college entrance examination, and the curriculum of the university which allowed easier graduation in contrast to entrance. The alternative of the academic clique deconstruction was recurrence of the Erudition. The recurrence erudition will be the key to solve the current problems in this academic clique society. Therefore, to normalize our education, we must deconstruct the current system of college-entrance-exam, pedagogy, and the curriculum of the universities, then, recur the Erudition to prohibit the reappearing the academic clique in the future.

평생학습사회에서의 청소년들을 위한 여가교육

최항석 京機大學校 學生生活硏究所 2002 學生生活硏究 Vol.18 No.-

The purpose of this study is to identify the new meaning of the leisure education for youths as upgrading their lives. Based on the literature review, this study found the meaning of the leisure is not only to rest without any sorking, but also to try to make out lives as wealthy. Especially, for youths, it is the essential interesting how to enjoy their leisure lives is related to their personal and social lives directly. Howevr, it is not eeasy to enjoy the leisure properly. "the Active leisure" can be made to rich our lives, but on the other hand the "passive leisure" can be made to destroy our creative lives possibly. It is important that, for youths, the andragogy is the crucial role to properly enjoy our leisure lives. In addition, the school should be the place where the youths can enjoy their leisure lives Therefore, it is the most significant role of the andragogy in the life-long aearning society to change from "the passive leisure" or "Dangerour Leisure" to "the active leiusre" or "creative leisure" for our youths.

[특별세션강연 5] 플랜트 FEED(front-end engineering & design) 설계 기반 구축

최항석(Hang Seok Choi),김용진(Yong Jin  Kim),김석준(Seock Joon Kim),최연석(Yeon Seok Choi),최병익(Byung-Ik Choi),최병일(Byung Il Choi) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.5

Design, Synthesis, and Preliminary Cytotoxicity Evaluation of New Diarylureas and Diarylamides Possessing 1,3,4-Triarylpyrazole Scaffold

Choi, Won-Kyoung,El-Gamal, Mohammed I.,Choi, Hong-Seok,Hong, Jun-Hee,Baek, Dae-Jin,Choi, Ki-Hang,Oh, Chang-Hyun Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.9

A series of new diarylureas and diarylamides possessing 1,3,4-triarylpyrazole scaffold was synthesized and their in vitro antiproliferative activities against A375P human melanoma cell line and NCI-60 cell line panel were tested. Compounds 9, 11, 12, 14, and 17-21 showed superior potency against A375P to Sorafenib. Over the NCI-60 cancer cell line panel, compound 14 possessing a methoxy group, amide linker, and 4-chloro-3-(trifluoromethyl)phenyl terminal ring showed the highest potency and broad-spectrum anticancer activity. Compound 13 showed high selectivity towards leukemia subpanel over other cancer types.

Characterization of Korean solid recovered fuels (SRFs): an analysis and comparison of SRFs.

Choi, Yeon-Seok,Han, Soyoung,Choi, Hang-Seok,Kim, Seock-Joon Academic Press ; Munksgaard 2012 Waste management & research Vol.30 No.4

<P>To date, Korea has used four species of solid recovered fuels (SRFs) which have been certified by the Environmental Ministry of Korea: refuse-derived fuel (RDF), refused plastic fuel (RPF), tyre-derived fuel (TDF), and wood chip fuel (WCF). These fuels have been used in many industrial boilers. In this study, seven regulatory properties associated with each of the four species: particle size, moisture and ash content, lower heating value (LHV), total chlorine, sulfur, and heavy metals content (Pb, As, Cd, Hg, Cr) were analysed. These properties are the main regulation criteria for the usage and transfer of SRFs in Korea. Different properties of each SRF were identified on the basis of data collected over the last 3 years in Korea, and the manufacturing process problem associated with the production of SRFs were considered. It was found that the high moisture content of SRFs (especially WCF) could directly lead to the low LHV of SRFs and that the poor screening and sorting of raw materials could cause defective SRF products with high ash or chlorine contents. The information obtained from this study could contribute to the manufacturing of SRF with good quality.</P>

Grid-Connected Photovoltaic Inverter with Zero-Current-Switching

Hang-Seok Choi,Y.J.Cho,J.D.Kim,B.H.Cho 전력전자학회 2001 ICPE(ISPE)논문집 Vol.2001 No.10

This paper presents a new zero current switching (ZCS) inverter for grid-connected photovoltaic system. The proposed circuit provides zero current switching condition for all the switches, which reduces switching losses significantly. It is controlled to extract maximum power from the solar array and to provide sinusoidal current into the mains. Analysis, small signal modeling and design procedure are presented. The validity of the proposed system is verified by experimental results from the 1.2 kW prototype inverter operating at 40kHz.

The Effect of Micro-Pore Configuration on the Flow and Thermal Fields of Supercritical CO₂

Choi, Hang-Seok,Park, Hoon-Chae,Choi, Yeon-Seok Korean Society of Environmental Engineers 2012 Environmental Engineering Research Vol.17 No.2

Currently, the technology of $CO_2$ capture and storage (CCS) has become the main issue for climate change and global warming. Among CCS technologies, the prediction of $CO_2$ behavior underground is very critical for $CO_2$ storage design, especially for its safety. Hence, the purpose of this paper is to model and simulate $CO_2$ flow and its heat transfer characteristics in a storage site, for more accurate evaluation of the safety for $CO_2$ storage process. In the present study, as part of the storage design, a micro pore-scale model was developed to mimic real porous structure, and computational fluid dynamics was applied to calculate the $CO_2$ flow and thermal fields in the micro pore-scale porous structure. Three different configurations of 3-dimensional (3D) micro-pore structures were developed, and compared. In particular, the technique of assigning random pore size in 3D porous media was considered. For the computation, physical conditions such as temperature and pressure were set up, equivalent to the underground condition at which the $CO_2$ fluid was injected. From the results, the characteristics of the flow and thermal fields of $CO_2$ were scrutinized, and the influence of the configuration of the micro-pore structure on the flow and scalar transport was investigated.

Design Consideration of Half-Bridge LLC Resonant Converter

Choi, Hang-Seok The Korean Institute of Power Electronics 2007 JOURNAL OF POWER ELECTRONICS Vol.7 No.1

LLC resonant converters display many advantages over the conventional LC series resonant converter such as narrow frequency variation over wide range of load and input variation and zero voltage switching even under no load conditions. This paper presents analysis and design consideration for the half bridge LLC resonant converter. Using the fundamental approximation, the gain equation is obtained, where the leakage inductance in the transformer secondary side is also considered. Based on the gain equation, the practical design procedure is investigated to optimize the resonant network for a given input/output specifications. The design procedure is verified through an experimental prototype of the 115W half-bridge LLC resonant converter.

Design Consideration of Half-Bridge LLC Resonant Converter

Hang-Seok Choi 전력전자학회 2007 JOURNAL OF POWER ELECTRONICS Vol.7 No.1

LLC resonant converters display many advantages over the conventional LC series resonant converter such as narrow frequency variation over wide range of load and input variation and zero voltage switching even under no load conditions. This paper presents analysis and design consideration for the half bridge LLC resonant converter. Using the fundamental approximation, the gain equation is obtained, where the leakage inductance in the transformer secondary side is also considered. Based on the gain equation, the practical design procedure is investigated to optimize the resonant network for a given input/output specifications. The design procedure is verified through an experimental prototype of the 115W half-bridge LLC resonant converter.

A Numerical Study for Heat Transfer Characteristics of a Micro Combustor by Large Eddy Simulation

Choi, Hang Seok,Park, Tae Seon Taylor Francis 2009 NUMERICAL HEAT TRANSFER PART A-APPLICATIONS - Vol.56 No.3

<P> The characteristics of heat transfer in confined multiple jet flows of a micro can combustor is investigated by means of large eddy simulation (LES). The micro combustor can be employed for a hybrid system, which consists of a micro gas turbine and a solid oxide fuel cell. In the present study, the focus is brought into heat transfer, which has a great effect on combustion stability as heat loss to the outside of combustor. The study is made for the three cases of different baffle plate configurations with changing the velocity ratio between fuel and oxidant jets. Downstream of the baffle plate, the flow recirculation regions appear and they can affect the enhancement of the turbulent heat transfer to the wall. In particular, the near-wall flow recirculation region formed between the oxidant jet and the combustor wall plays an important role for wall heat transfer. We study the turbulent thermal fields and conjugate heat transfer which show peculiar characteristics corresponding to the three different baffle plate shapes and different velocity ratios.</P>