다중 제어루프에 의한 자기부상용 DC-DC 전원장치에 관한 연구

조주현,조정민,전기영,이상집,이승환,오봉환,이훈구,한경희 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

The author present a modified multi-loop algorithm including feedforward for controlling a 55kW step down chopper in the power supply of Maglev. The control law for the duty cycle consists of three terms. The first is the feedforward term which compensates for variations in the input voltage. The second term consists of the difference between the slowly moving inductor current and output current. The third term consists of proportional and integral terms involving the perturbation in the output voltage. This perturvation is derived by subtracting the desired output voltage from the actual output voltage. The proportional and integral action stabilizes the system and minimizes output voltage error. In order to verify the validity of the proposed multi-loop controller, simulation study was tried using Matlab simulink.

간세포암과 하대정맥 막성폐쇄의 치료 후 호전된 백혈구파괴혈관염 1예

이준엽 ( Jun Yeob Lee1 ),이주원 ( Ju Won Lee1 ),이진욱 ( Jin Wook Lee ),박현준 ( Hyun Joon Park ),장국환 ( Gook Hwan Jang ),김다정 ( Da Jung Kim ),김선민 ( Sun Min Kim ),한병훈 ( Byung Hoon Han ),정규식 ( Gyoo Sik Jung ),김근태 ( 대한류마티스학회 2015 대한류마티스학회지 Vol.22 No.5

저자들은 하지 자색반과 고환 통증으로 내원한 알코올성 간경화증 환자에서 LCV의 원인 감별하는 과정에서 HCC와 하대정맥 막성폐쇄를 진단하고 이에 대한 치료 후 LCV의 호전된 증례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Vasculitis is a heterogeneous group of diseases that destroy blood vessel walls by inflammation. Approximately half of vasculitis cases are idiopathic, but sometimes associated with genetic factors, medicines, chronic infection, autoimmune diseases, and malignancies. Although the mechanism remains unclear, vasculitis secondary to malignancy, also known as paraneoplastic vasculitis, has been reported. It is generally associated with hematologic malignancies rather than solid malignancies and commonly presents as leukocytoclastic vasculitis or polyarteritis nodosa. We experienced a case of leukocytoclastic vasculitis in a patient with hepatocellular carcinoma and membranous obstruction of the inferior vena cava. Here, we report this case with a brief review of literature. (J Rheum Dis 2015;22:322-326)

Sodium Trans-Bis(methyliminodiacetato)Chromate(Ⅲ)의 두가지 다른 空間群 P1￣와 A2/n間의 相互 變換

李珍昊,宋柱昊,崔成山,郭相姬,吳美蘭,박성진,李揆旺,徐廷善,徐日煥 충남대학교 1996 忠南科學硏究誌 Vol.23 No.1

The structure of sodium trans-bis(methyliminodiacetato) chromate(Ⅲ), C_10H_14O_8N_2CrNa, has been elucidated with two space groups P 1-; a=8.9856(6), b=13.308(1), c=6.261(1)Å, α=76.38(1), β=110.361(9), r=107.394(6)˚, V=662(2)Å^3, Z=2, μ=0.47mn^(-1), d=1.831Mg/㎥, R=0.0295 for 1901 independent reflections with F^2>2σ(F^2), and A2/n; a=13.65(5), b=6.261(1), c=16.85(6)Å, β=113.05(1)˚, V=1324(7)Å^3, Z=4, R=0.0287 for 1013 independent reflections with F^2>2σ(F^2). There are two different asymmetric half molecules in triclinic system and one asymmetric half molecule in monoclinic system. The structures of three different molecules are very similar in conformations. The four carboxyl O atoms and the two imino N atoms in each molecule produce a distorted octahedral coordination geometry around the Cr atom. The average distances of Cr-O(carboxyl) and Cr-N(imino) are 1.956 and 2.061Å respectively. Molecules are held together by ionic forces. In this paper, it has been also shown that the cell constants, Miller indices, atomic coordinates, lattice directions and reciprocal lattices of the two space groups can be mutually transformed.

보툴리눔 독소 주사 효과의 정량적 분석을위한 복합근활동전위 측정

서정환,김상수,김남균,이주홍 大韓再活醫學會 1998 Annals of Rehabilitation Medicine Vol.22 No.6

집단 따돌림 피해학생을 대상으로 한 인지행동적 집단치료 개발을 위한 예비 연구

이주현,신지용,연병길,한창환 대한소아청소년정신의학회 2000 소아청소년정신의학 Vol.11 No.2

본 연구는 집단 따돌림 피해학생을 대상으로 시행한 인지행동적 집단치료의 개발을 위한 예비 연구이다. 정상적인 중학교 1학년 학생 202명에게 도덕발달수준척도, 오퍼 자아상척도, 우울 및 상태ㆍ특성불안척도의 분포와 상관관계를 조사하였다. 자아상과 우울, 불안은 서로 강한 상관관계를 보였으나, 도덕발달과는 상관관계를 보이지 않았다. 이는 도덕발달이 정서에 크게 영향받지 않고 인지 발달적 과정에 의존하는 것을 시사한다. 그리고 교사의 관찰에 의해 집단 따돌림 피해를 받으면서 학교 적용에 어려움을 보이는 중학교 1학년 학생 5명의 도덕발달수준척도, 오퍼 자아상척도, 우울 및 상태ㆍ특성불안척도는 전체 집단과 유의한 차이를 보이지 않았다. 이 피해학생들을 대상으로 12회에 걸쳐 인지적 집단 정신치료를 시행하고, 치료 전후에 상기 4가지 척도의 변화를 평가하여 효용성을 검정하였으나 통계학적으로 유의한 변화는 없었다. 그러나 참가 학생들이 치료 기간 중에 기재한 일기에서 확인되는 심리적 마음자세(psychological mindedness)의 향상과 담임 교사의 긍정적인 평가보고는 의미있는 것으로 생각되었다. 중심 단어 : 집단 따돌림ㆍ인지행동적 집단치료ㆍ청소년ㆍ자아상ㆍ도덕발달ㆍ우울ㆍ불안 Bullying is the intentional, unprovoked abuse of power by one or more children to inflict pain on or cause distress to another child on repented occasions. Bullying can be considered to be a form of child abuse : peer abuse. Victims suffer adverse effects in the short and long term. If bullying is regarded as a form of abuse then professionals have a duty to detect it, take it seriously, and ensure that it is deal with to reduce the child's suffering and minimize the potential long term effects. This study is aimed preliminarily the development of cognitive behavioral group therapy for school bullied. 202 normal middle school freshman responded to self report scales-Offer's Self-Image Questionnaire-Revised, Children's Depression Inventory, Spielberger State/Trait Anxiety scale, and Defining Issues Test. The data were analyzed with Pearson's correlation to test the relationship among the above 4 variables. Self Image, depression, and anxiety were correlated strongly each other. But moral development was not correlated with self image, depression, and anxiety. Five school bullied students were referred by their teacher for school maladjustment. The author tried 12 sessions of Cognitive-Behavioral group therapy and assessed their behaviors pre- and post intervention by above 4 scales. There were no significant different intervention effects statistically. But It is meaningful that improvement of psychological mindedness in diary written by subject in treatment sessions KEY WORDS : School bullyingㆍCognitive-behavioral group therapyㆍAdolescentㆍSelf imageㆍMoral developmentㆍDepressionㆍAnxiety

交叉路의 遲滯時間을 利用한 交通配分模型에 關한 硏究

이주환,김대웅 嶺南大學校 工業技術硏究所 1997 工業技術硏究所論文集 Vol.25 No.2

This study surveyed the efficiency of network method for traffic assignment by using delay time as link performance function resulted from KHCM and Webster. The results of this study can be summarized as follows. The existing traffic assignment models used daily OD data to forecasting future segment volumes. For that reason in this study converts daily OD data into peak hour OD data based on person trip survey, and applies to traffic assignment. The algorithm for finding the minimum path is programed to calculate efficiently the existing minimum path. And then, using this, estimates segment volumes and compares these with current volumes by five link performance functions and assignment model of PATS. As a result, suitability of link performance functions are presented in order to delay of KHCM, Webster's delay, BPR formula of USA, BPR formula of Korea, Q-V curve. So link performance function for traffic assignment, using the delay time at intersection of KHCM or Webster is available.

교양 교육과정의 문제점과 개선 방안 : 조선대학교 건학이념 및 교육목적 달성을 위한 교양 교육과정

이달석,조주환,노봉오,김정주 조선대학교 사범대학 부설 교과교육연구소 1998 敎科敎育硏究 Vol.1 No.1

기업 구성원의 조직시민행동에 미치는 인지, 정서 및 성격의 효과

이주일,민경환 서울大學校 社會科學大學 心理科學硏究所 1995 心理科學 Vol.4 No.2

본 연구는 최근 연구자들의 많은 관심을 끌고 있는 친 사회적 조직행동의 하나인 조직내 시민행동에 대한 정서, 인지, 성격변인의 효과를 비교하였다. 우선 최창희(1994)의 한국형 조직시민행동척도의 재개념화 했고, 정성, 성격, 인지변인의 조직시민행동에 대한 영향력을 비교하였다. 세 변인 각각이 조직시민행동을 설명하는 정도를 분석한 결과 정서변인은 급여만족 이외에 삶에 대한 만족, 직무에 대한 만적, 상사에 대한 만족이 조직시민행동과 유의미한 관련이 있었다. 인지변인은 조직시민행동중 충성행동과만 유의미한 관련을 보여주었다. 성격변인들은 예상대로 대부분의 조직시민행동들과 유의미한 관련이 있음을 보여주었다. 다음으로 정서, 인지, 성격변인간에 조직시민행동을 설명하는 예언력에서의 차이를 분석한 결과는 성격, 정서, 인지 변인의 순으로 설명력이 큰 것으로 나타났다. 다음으로 정서변인의 매개변인으로서의 효과를 검증하였다. 연구결과는 상호작용정의와 성실성 행동을 상사에 대한 만족이 매개함을 보여 주었다. 마지막으로 본 연구 결과의 의미에 대한 검토를 하였고, 본 연구의 한계점과 제안사항을 언급하였다. This study compared the effects of emotional, cognitive, and personality variables on the organizational citizenship behavior, one of the pro-social organizational behaviors, which has recently aroused the interest of many researchers in this field. Choi's(1994) Korean organizational citizenship behavior scale was first re-conceptualized and then the effects that emotional, personality, and cognitive variables have on the organizational citizenship behavior were compared. As the result of the analyses comparing the percentages of explain-ability attributed to each of the three variables in relation to organizational citizenship behavior, the emotional variables, i.e., besides the satisfaction concerning salary, life satisfaction, task satisfaction, and satisfaction concerning one's superior, were found to have a significant relationship with organizational citizenship behavior. As for cognitive variables, only obedience behavior seemed to be significantly related to organizational citizenship behavior. As predicted, the personality variables were found to have significant relationship with most of organizational citizenship behaviors. Furthermore, as the result of the analyses comparing the predictability that each personality, emotional, and cognitive variable has on the organizational citizenship behavior, the biggest explain-ability was found in the order of personality, emotional, and then cognitive variable. Next, the effect of emotional variable as a mediating variable was examined. The result of the study revealed satisfaction towards one's superior to be a mediating factor in interactive fairness and conscientiousness. Lastly, the implications of the results of this study were examined and the limitations and suggestions were discussed.

配分交通量 豫測時 Link 走行時間設定에 關한 硏究

李周桓,金度坤,金大雄 嶺南大學校 工業技術硏究所 1998 工業技術硏究所論文集 Vol.26 No.2

Judging form the results of estimating segment volumes, the applicability more differs with how link performance functions are set up rather than which traffic assignment model is used So, the purpose of this study is to establish link performance functions which fit the current transportation network in our country. The result of this study can be summarized as follows; ●Estimated parameter by total lane is α=2.0, β=2.76, but R ²=0.55. Estimated parameter by each lane is that R ²is over 90.0%. So, it is reasonable what Parameter of BPR function is used with each lane. ●When the traffic assignment, if BPR function is used as performance function must apply to each road type.

超軟弱 粘土의 壓密特性 硏究

李揆丸,李松,黃圭鎬,金周豪 서울市立大學校 1994 論文集 Vol.28 No.-

In recent years, the projects dealing with the marine clay have raising tendency. For example, the dredged clay can be used directly as the reclamation fill material. In this case, it is important to understand the consolidation characteristics for settlement analysis. Using conventional testing procedure, the determination of the consolidation characteris tics of cohesive soils requires consolidation time. the constant rate of strain consolidation test has been proposed as a method to reduce consolidation test time. The information used to the characteristics of settlement has been obtained using a standard oedometer test, but standard oedometer test may not be applicable to very soft soils with high water content because of limations both in theory and in testing techniques. A new constant rate of strain consolidation testing technique for very soft soils with water content of 200 to 500 % is proposed as an alternative of conventioinal oedometer test. This paper presents several benifts on the constant rate of strain consolidation test. To find the consolidation characteristics of the dredged soft clay constant-rate-of-strain consolidation testing method is used In this paper constant rate of strain consolidation test are compared with standard oedometer test for applicablity of constant rate of strain consolidation test It is concluded that the consolidation constants of very soft clays can be accurately determined from the constant rate of strain tests,also is suitable test of derdged clays as this test is applicable to regimes of the low stress level and high stress level