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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
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)
웹 서버상에서 PHP 스크립트 언어를 이용한 회원관리 시스템 구현
이훈재,오주환 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)
많은 사람들은 자신들의 필요나 호기심에 의하여 직접 게시판이나 대화방과 같은 회원관리 프로그램을 만들고 싶어하며 기존의 C나 Perl을 대신하여 PHP라는 간단한 스크립트 언어로 이를 실현할 수 있게 되었다. 본 연구에서는 PHP 스크립트 언어를 이용하여 웹 서버상에서 회원관리가 가능한 사용자 로그인 및 쪽지 보내기 기능을 갖는 회원관리 시스템을 구현하였다. 구현된 시스템은 PHP를 구동시키는 리눅스 OS를 실제 서버로 사용하였다. 본 연구에서는 이전까지 일반인들의 접근이 힘든 스크립트 언어가 얼마나 대중성을 갖게 될 것인지 간단히 구현해 보는데 큰 의미를 두고 있다.
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.
정서지능 : 개념의 소개 및 연구 전망 Its Conceptualization and Research Perspectives
이주일,민경환 서울大學校 社會科學大學 心理科學硏究所 1996 心理科學 Vol.5 No.1
본 연구는 최근 정서 개념에 관한 관심이 고조되는 상황에서 정서지능의 개념과 차원에 대한 고찰을 비롯하여 관련 연구들을 개관하고, 정서지능을 구성하고 있는 요소들 각각의 의미와 중요성을 살펴봄으로써 정서지능과 조직 행동 간의 관계성 규명을 위한 연구의 필요성을 제시하는 것에 그 목적을 두고 있다. 이를 위해 Mayer, Hsee 그리고 Salovey(1993) 등이 주장한 정서지능의 구성 요소들을 살펴 보고, 정서지능의 측정 방법에 관한 논의들에 대한 고찰과 더불어 구체적인 측정 방법의 일례로서 Goleman(1995)의 정의에 입각한 측정 도구의 내용을 제시하였다. 또한 정서지능이 개인의 일상 생활에 미치는 영향과 중요성 및 활용 가능성에 대한 연구들을 언급하고 그러한 연구들의 제한점을 발달, 개념 및 구성차원의 측면에서 고려해 보았다. 마지막으로 정서지능 개념의 정교화, 발달적 조망, 조직 행동과의 관련성 등의 문제에 대한 심리학적 연구의 필요성과 그 잠재적 중요성을 전망하였다.ABSTRACTThe purpose of this study was to emphasize the need for research to investigate the relationship between emotional intelligence and organizational behavior. Studies pertaining to conceptualizations and dimensions of emotional intelligence were reviewed to investigate significantly related factors, as proposed by Mayer, Hsee, and Salovey(1993), and the implications thereof. Furthermore, a discussion of measurement methods is presented, using as a specific example a scale based on Goleman' s(1995) definition. The overview of the studies concerning the implications and applications of emotional intelligence on the individual' s daily life is provided as well as their limitations in terms of developmental, conceptual, and constructive perspective. Finally, this study proposed the need for psychological research on elaborating the concept of emotional intelligence, its developmental implications, and its relationship with organizational behavior.
Cephalosporium acremonium var. M-10에 의한 Cephalosporin C 생산에 관한 연구
이호근,현형환,오두환,유주현 연세대학교 산업기술연구소 1990 논문집 Vol.22 No.2
The microorganism which produces Cepholsoporin C, has been selected from Cephalosporium acromonium by U.V radiation. Among the mutants, Cephalosporium acremonium var. M-10 was showed the highest Cephalosporin C productivity. On the basis of physiologieal characteristics, the difference hetween Cephalosporium acremonium var. M-10 and Cephalosporium acromonium was that the mutant did not assimilate sodium acetate, potassium nitrate, sodium nitrate. By using Cephalosporium acremonium var. M-10, the optimum conditions for the production of cephalosporin C on the rotary shaker were pH 7.0 soluble starch 4.0 w/v%, (NH₄)₂SO₄0.75w/v%,, CaCl ₂w/v%, soy bean meal 2w/v%, oleic acid 0.09w/v%, methionine 0.3w/v%, at 30℃ for 120 hours, respectively. On the study of time course, it revealed that the peak appeared at the stationery phese. The amount of Cephalosgorin C produced in this medium by mutant was about two times larger than that by Cephalosporium acremonium.
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
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.