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구자삼,김병현,조효제,이창호 韓國海洋大學校 附設 海洋科學技術硏究所 1998 硏究論文集 Vol.7 No.-
A barge-type structure has been recently watched since The Floating Structures Association of Japan proposed the new concept as the most suitable one of floating airports. In this paper, the method, which is based on a combination of a three-dimentional source distribution method and the wave interaction theory is applied to very large floating structure of barge-type. The calculated results show good agreement with the experimental and calculated ones by Yago and remarkable characteristics concerning the hydroelastic behavior of the very large floating structure on the effects of hydrodynamic interactions and choice of body modelling.
무보수 호흡용 보호구 착용이 2차 제련 연작업자들의 연폭로지표에 미치는 영향
이영구,황보영,리갑수,이성수,안규동,이병국 순천향대학교 산업의학연구소 1997 순천향산업의학 Vol.3 No.1
It is often impossible to improve working condition in small scaled lead industries due to inherent old work process and lack of capital to improve it. This is particularly true in secondary smelting industries in Korea. Alternative ways to protect workers in these industries are respiratory protection and job shift if at all possible to less harmful workplace. This study intended to evaluate the effect of maintenance free respirator and job shift of lead workers to other non-lead workplace on the level of lead exposure of workers in terms of blood zinc protoporphyrin as an index of lead absorption and intoxication of lead workers. Seventy three workers of one secondary smelting industry whose work duration was more than 4 months were studied. All workers were classified into 4 groups such as managemental workers(8), non-lead workers(14), lead workers(44) and shift workers(7). Personal data such as age and work duration were collected and air concentration of lead in each workplace were also measured. Blood ZPP was chosen as an index of biological monitoring and was measured regularly once a month for 5 months study period. The results obtained were as follows: 1. There were no significant differences of mean blood ZPP during 5 months study period in management workers and non-lead workers showing the range of 23.1-26.5 ㎍/100ml and 22.2-24.2 ㎍/100ml respectively. 2. Rapid reduction of mean blood ZPP from first month (203.0 ± 106.7 ㎍/ 100ml) to third month (128.4 ± 75.1 ㎍/100ml) was noticed and after 3 months period there was no further reduction of blood ZPP in lead workers. 3. The initial mean blood ZPP of shift workers who moved to non-lead workplace was 394.3 ± 114.9 ㎍/100ml and their mean blood ZPP were steadily decreased every month from 344.3 ± 98.4 ㎍/100ml of first month to129.9 ± 33.5 ㎍/100ml of 4th month). 4. The average reduction rate of blood ZPP based on initial blood ZPP was 37.0% in lead workers for 3 months period and 67.1% in shift workers for 4 months period. With above results it was observed that respiratory protection and work shift could protect lead workers from lead exposure by reducing lead exposure in secondary smelting industry which had fairly bad working condition. But for a complete prevention of lead poisoning, it has certain limitation and should be used as an interim method until fundamental engineering control of workplace.
文炳河,文九,文錫哉 대한한방종양학회 1995 대한한방종양학회지 Vol.1 No.1
Bikiwhan is one of the oriental medicines that have been used for the treatment of tumors since ancient times. However, the mechanism of the drug action is not closely surved. This study was made to investigate the effects of Bikiwhan on the innate immunity were analysed by measuring the functions of phagocytes, and those of specific immunity were analysed by measuring T and B cells activities. The followings are the results obtained from this study : 1. Bikiwhan has direct cytotoxic effects against human lymphoma cell lines(K562) in dose dependent manner. 2. An administration of Bikiwhan increased allogenic immune response in the mouse. 3. An administration of Bikiwhan increased the antibodies formation against SRBC. 4. An administration of Bikiwhan enhanced the apperance of rosette forming cells in the spleen. 5. An administration of Bikiwhan decreased the delayed-type hypersensitivity against dinitrofluorobenzene. 6. An administration of Bikiwhan has no effect on natural killer cells. 7. Bikiwhan increased the phagocyte activity of peritoneal macrophages in vitro and in in vivo as well. 8. Bikiwhan depressed the formation of reactive oxygen intermediated in vitro and in vivo as well. 9. Bikiwhan has the capacity to make peritoneal macrophages secrete nitric oxide. The above results demonstrate that Bikiwhan has enhancing effects of immune responses against tumors by decreasing tissue demages˙ caused by immune responses.
강병구 한국사회보장학회 2004 사회보장연구 Vol.20 No.2
한국보건사회연구원에서 실시한 『저소득층 자활사업 실태조사』 자료를 분석한 결 과 2002년 우리나라의 시장소득 기준 상대적 빈곤률은 20.75%로 추정되지만, 공적이전소득의 빈곤감소효과 및 노동공급 감소효과는 매우 미약한 것으로 평가되었다. 사회보험급여를 포함한 공적 이전소득은 전체 가구의 2.21%(약 329천 가구)만을 상대적 빈곤으로부터 구제하였으며, 빈곤계층의 평균소득갭을 9.17% 축소시키는데 불과하였다. 또한 공적 이전소득의 소득분배 개선효과는 동등화지수를 0.5로 할 경우 지니계수를 0.01945 포인트(5.51%) 감소시키는 것으로 나타났다. 사회보험급여를 포함한공적 이전소득이 연간 100만원 증가할 때 남자세대주와 여자세대주의 연간 노동시간은 각각 81.6시간(1.06%)과 15.6시간(0.76%) 감소하고, 공적 이전소득의 노동공급탄력성은 비근로소득에 비해 매우 작은 것으로 나타났다. 향후 우리나라의 공적 이전지출 정책은 예산의 절대 규모를 증대시켜 빈곤층의 보호를 확대하는 가운데 노동공급의 감소로 인한 경제적 비효율의 발생을 최소화시키는 방향으로 추진되어야 한다. 특히 고용보험제도의 근로유인체계를 강화하고, 국민기초생활보장제도의 경우 근로능력이 있는 조건부수급자에 대한 근로유인체계를 개선할 필요가 있다. Since the economic crisis in 1997, there has been increasing demand for the expansion of social welfare expenditures in Korea. At the same time the welfare system has been criticized by its inefficiency. According to the analysis with National Survey on the Low-Income Classes and Self-Reliance Program, the relative poverty rate which is measured in terms of the 50% of household median income was 20.75% in 2002. The same analysis showed that the effects of government transfer programs on poverty reduction and income redistribution were insignificant. Also, the negative effect of government transfer programs on labor supply was smaller than that of unearned income. Implications derived from the analysis are as follows. While the government transfer programs should be expanded to protect the poor, the Korean welfare system should be restructured to minimize welfare loss. For the efficient transfer programs need to closely link with active labor market policies.
鄭丙求,梁千會 大田工業大學 1992 한밭대학교 논문집 Vol.9 No.1
The sensing mechanism of SnO_2 semiconductor gas sensor was studied by examining, via the reactive sputtering method, the transient response characteristics of conduc- tivity of gas sensor for Hydrogen and Oxygen. The study revealed the following facts ; (1) If atmosphere containing pure air is changed to one containing mixed gas of H_2-o_2-N_2, the speed of change in sensor conductivity is highest in air containing Hydrogen. (2) If atmosphere containing mixed gas of H_2-O_2-N_2 is changed to one containing pure air, the speed of change in sensor conductivity does not vary significantly with the kind and concentration of gas. This fact suggests that the change results from the adsorption of Oxygen onto open sites on SnO_2.
정책과정에서의 NGO 역할에 관한 실증적 연구 : 관련 집단의 인식을 중심으로 Focused on the Recognition of Related Parties
최병대,김상구 한국정책학회 2004 韓國政策學會報 Vol.13 No.1
NGO는 거버넌스 개념의 주요 구성요소이고, 이 개념에는 성과와 효율을 지향하는 신공공 관리적 개혁뿐만 아니라, 정부의 주요 정책과정에 NGO가 참여해야 한다는 연대적 혹은 네트워크적 협동정신이 포함되어 있다. 이에 본 연구는 지방정부 정책과정에서의 NGO 역할을 서울특별시 난지도 골프장 건설사례와 부산광역시 명지대교건설 사례에 참여한 시민단체의 상근자, 시민단체 소속 전문가들 및 관려 공무원들의 인식을 통해 실증적으로 분석하고자 하였다. 분석의 결과, 정책과정에서 수행역할 책임이 어느 집단에 있느냐?에 따라 책임이 있는 집단은 변수의 수행역할을 충실히 다하였다고 응답하고 있는 반면에, 수행책임이 없는 집단은 상대방의 역할을 낮게 평가하고 있는 것으로 나타났다. 그리고 NGO의 역할에 영향을 미치는 요인으로는 공공의제 제시, 이해와 갈등의 조정, 토론회?청문회 등의 참여, 정부의 책무성 추궁, 정책오류의 수정 및 변경시도, 시민단체의 의견을 재투입하려는 시도 등으로 나타났다.
장병연,금창구,김희연 국립특수교육원 1995 연구보고서 Vol.- No.3
This study investigates to what degree o,』 special schools are managedefficiently and how to develop effective seHf-evaluation model on specialschool management. Self - evaluation of special school managemant isconsidered as an indispensible process to irrlprove educational activities ofspecial school.To pursoe the purpose this study analyzes current status and needs of self- evaluation of special school management and develops model on self -evaluation of special school management.This study provides the concept, objectives, criteria, types, methods andprocedures, success conditions, and domains and contents of self - evaluationof special school management. The study also present current status, needs,and model on self - evaluation of special school. MethodsThis study was conducted by reviewing related literature, teamconferences, and questionnaire survey.1) By reviewing the related literature and documents, theory of self -evaluation of school was explored and some current status of self - evaluationresults were reviewed.2) In order to establish effective study plan and to review the studyprocess, team conferences with professors and educational administratorswere held.3) In order to find out current status and needs of self - evaluation ofspecial school management, questionnaire survey was carried out toeducational administrators and teachers in special schools.Results1) The majority of teachers recognized the necessity of self - evaluation ofspecial school management.2) It was shown that object of self- evaluation of special schoolmanagement was providing opportunity for review and prescription of planand practice of special school management.3) Self - evaluation domains of special school management were devidedinto overall and concrete domains in special school management.4) The concrete domains of self - evaluation of special school managementwere educational object, educational plan, managemant of financial affairs,management of facilities and school environment, relationships with the community, welfare of teacher, management of office work, clinicalsupervision, relationship with parents, goverenment policies on education,operation of curriculum, career educati☞n, guidance of student's life,evaluation of students'academic achievement, teaching materials, therapeuticeducation, and extra-curricula activities.Conclusion1) Many items of evaluation criteria should be selected to get benefitinformation for special school management.2) The evaluation standards should be designed to determine the order ofevaluation object, evaluation contents, and f;he evaluation viewpoint associaf;edwith the aim of the evaluation.3) Educational object and plan in sf)ecial school should be reflect÷edacademic achievement of students appropriately.4) Those data and information must be reported by all teachers.5) The results of self - evaluation of special school management should bereflected in establishing the next year's educational planning.
고밀도 플라즈마를 이용한 YMnO_3 박막의 건식 식각 특성
민병준,김창일,장의구 중앙대학교 기술과학연구소 2000 기술과학연구소 논문집 Vol.30 No.-
본 연구에서는 YMnO_3 박막을 유도결합 플라즈마 (ICP : inductively coupled plasma)와 Cl_2/Ar 가스를 이용하여 식각하였다. 최대 식각율은 1.0의 Cl_2/(Cl_2+Ar) 가스 혼합비, 600W의 rf 전력, -200 V의 직류 바이어스 전압, 15 mTorr의 반응로 압력 및 25 ℃의 기판 온도에서 285A˚/min이었다. 완충층으로 사용되는 CeO_2, Y_2O_3와 전극 물질인 Pt, 마스크 물질인 PR (photoresist)와의 선택비는 각각 2.85, 1.72, 0.45, 0.06이었다. 식각된 YMnO_3 박막 표면에서의 화학반응을 알아보기 위해서 XPS (x-ray photoelectron spectroscopy)와 SIMS (secondary ion mass spectrometry) 분석을 수행하였다. Y은 Cl 라티칼과의 화학적인 반응에 의해 주로 제거되는 반면, Mn은 Ar 이온에 의한 물리적인 스퍼터링에 의해 주로 식각된다. SEM (scanning electron microscopy)을 통해 식각 단면을 분석하여 약 65°의 식각 기울기와 측벽에 잔류물이 없는 것을 확인하였다. Ferroelectric YMnO_3 thin films are excellent dielectric materials for high integrated ferroelectric random access memory (FRAM) with metal-ferroelectric-silicon field effect transistor (MFSFET) structure. In this study, YMnO_3 thin films were etched with Cl_2/Ar gas chemistries in inductively coupled plasma (ICP). The maximum etch rate of YMnO_3 thin films is 285A˚/min under Cl_2/Ar of 10/0, 600 W/-200 V and 15 mTorr. The selectivities of YMnO_3 over CeO_2 and Y_2O_3 are 2.85, 1.72, respectively. The results of x-ray photoelectron spectroscopy (XPS) reflect that Y is removed dominantly by chemical reaction between Y and Cl, while Mn is removed more effective by Ar ion bombardment than chemical reaction. The results of secondary ion mass spectrometer (SIMS) were equal to these of XPS. The etch profile of the etched YMnO_3 film is approximately 65° and free of residues at the sidewall.
增損五積丸(碑積方)이 사람의 各種 癌細胞株의 成長沮碍에 미치는 效果
李竝求,元秦喜,文錫哉,金東雄,元京淑,文九 한국전통의학연구소 2002 한국전통의학지 Vol.12 No.1
chemosensitivity test of Geungsonojukwhan-Bijukbang was performed on the three different human cancer cell lines originated from liver, cervix and colon tissue, namely Hep 3B, Hela and HCT-15, which have similar doubling times. Semiautomated sulforhodamine B(SRB) assay appears to offer an valuable tool for chemosensitivity of unknown compounds, since it is a simple, valid and inexpensive method of assessing drug monitoring for large samples in a short time. The results obtained in this study were as follows 1. Good correlations were shown from the results of SRB assay and those of clogenetic assay. 2. As a result of exposure to Geungsonojukwhan, the proliferation of Hela cell and Hep 3B cell was slightly decreased in Geungsonojukwhan-Bijukbang(GIP), Geungsonojukwhan-Pejukbang(LUP) and Geungsonojukwhan-Sinjukbang(RTP). 3. As a result of exposure to Geungsonojukwhan, GIP showed better anticancer effect to HCT-15 cell lines than those of LUP and RTP. 4. The extract of Geungsonojukwhan-Bijukbang in 40℃ were more effective in cytotoxic response than those in 100℃. 5. The research showed that the higher concentration the more effective in the inhibition of proliferation of the cancer cell lines, however, the cytotoxic effect of Geungsonojukwhan-Bijukbang in the concentration of 1.60mg/㎖ and 3.20mg/㎖ showed the most effective inhibition rate according to the increase of concentration.