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.

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.

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>

Numerical Study on Oxy-Combustion of Char in a Circulating Fluidized Bed Reactor

( Hang Seok Choi ),( Yong-chil Seo ) 한국폐기물자원순환학회 2023 I-CIPEC Vol.2012 No.0

CFD Simulation of Fluidized Bed Pyrolyzer for Waste Biomass

( Hang Seok Choi ) 한국폐기물자원순환학회(구 한국폐기물학회) 2012 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2012 No.-

NMR Assay for Hoogsteen Base Pairing in Echinomycin Complex with Specifically Deuterated DNA Hexamer

Choi Ki-Hang,Park Jin-Young,Lee Bok-Luel,Choi Byong-Seok Korean Chemical Society 1992 Bulletin of the Korean Chemical Society Vol.13 No.4

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.

Numerical study of fast pyrolysis of woody biomass in a gravity-driven reactor

Choi, Hang Seok,Choi, Yeon Seok,Kim, Seock Joon John Wiley Sons, Inc. 2009 Environmental progress & sustainable energy Vol.28 No.3

<P>In the present study, computational fluid dynamics is applied to investigate fast pyrolysis characteristics of woody biomass in a gravity-driven reactor. A Eulerian-Eulerian approach is adopted, including three gas species and three solid phases, for multiphase reacting flow fields between solid and gas. Two-stage semiglobal reaction kinetics considering the secondary tar cracking mechanism is used for simulation of the pyrolysis reaction. The flow and pyrolysisreaction characteristics of the reactor are investigated, and the reaction rates of woody biomass pyrolysis are evaluated for streamwise locations in the reactor. Also, the inlet condition and inclination angle are changed to study their effects on the reaction. From the predicted results, it is seen that the heat transfer to biomass is governed mainly by mixing of particles, and this influences the final pyrolysis reaction. © 2009 American Institute of Chemical Engineers Environ Prog, 2009</P>

Two Stage Power Factor Correction(PFC) Converter With A Single PWM Controller

Hang-Seok Choi,Kyu-Chan Lee,B.H.Cho 전력전자학회 1998 ICPE(ISPE)논문집 Vol.- No.-

Two-stage power factor correction (PFC) converter with a single PWM controller for universal input voltage (90-264V) is proposed. It consists of a power factor pre-regulator cascaded by a DC/DC converter as in a conventional two-stage approach. However, a single PWM controller is used as in a single-stage, single-switch PFC approach. The switch in the FFC part is synchronized with the switch in the DC/DC converter with a fixed switching frequency. Employing an adaptive delay scheme the switch in the PFC part is controlled to limit the energy storage capacitor voltage within a designed range for the optimum efficiency, and to reduce input current harmonic distortion. The experimental results obtained on a 200W (5V/40A) prototype PFC converter are given to verify the effectiveness of the proposed control method.<br/>

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.