세자리 Schiff base Cobalt(Ⅱ)와 Nickel(Ⅱ) 착물들의 합성과 전기화학적 성질

정만태,이송주,채희남,정병구 광주보건대학 1994 論文集 Vol.19 No.-

Co(Ⅱ) and Ni(Ⅱ) complexes containing tridentate Schiff base ligand SOIPH [salicylidene-o-iminopyridine] derived from salicylaldehyde with 2-aminopyridine were synthesized. These complexes were characterized 표 elemental analysis, thermogravimetric analysis(T.G.A.), solution conductivity, and IR and UV-visible spectra. It was found that Co(Ⅱ) and Ni(Ⅱ) complexes had a 2 : 1 Schiff base ligand to metal(Ⅱ) ratio and were octahedral configuration. The redox processes of these complexes in DMF and DMSO containing 0.1M TEAP as supporting electrolyte were investigated at glassy carbon electrode by cyclic voltammetry (CV) and at HMDE(hanging mercury drop electrode) by differential pulse polarographic (DPP) technique. Reduction of Co(Ⅱ) complex was two steps, whereas Ni(Ⅱ) complex was one step. Reduction of these complexes observed as one electron process irreversibly and diffusion- controlly. Reduction of the Co(Ⅱ) complex was observed positive potential than Ni(Ⅱ) complex.

한국의 국가자율성및 국가능력과 토지정책

鄭希男 서울市立大學校 法律行政硏究所 1993 法律行政論集 Vol.1 No.-

Many Korean political economists have argued that the Korean state has been a strong interventionist developmental state, which has had an autonomy from its economically dominant groups and capacity in implementing its economic policies. By analyzing the idle land policy, which compelled the Korean big business groups of Chaebol to sell off their idle land, the study is designed to rethink this autonomy and capacity of the Korean state. The initiation of these policy measures shows the existence of the strong, developmental state. However, the implement process and its consequencies suggest that the Korean state's economy and capacity to control the behavior of the Chaebol was structurally limited. On the other hand, Korean capitalists were not as weak or passive to state policy as much existing literature assumes. The decline of state autonomy has been features of Korean economic development. The rise of business autonomy and capacity has also been the result of globalization of capitalism, including both the trans-nationalization of world capital and the increase in overseas investment by the Korean capitalists.

치관보철용 글라스 세라믹 재료에서 조성비 변화에 따른 기계적 특성에 관한 연구

정인성,김형일,박성수,최경남,안진모,박희찬 대한치과기재학회 1999 대한치과재료학회지 Vol.26 No.1

Glass ceramics for dental crown prosthesis were prepared by heat-treatment of CaO-MaO-SiO₂-P₂O -TiO₂glasses. The crystallization behaviors of samples have been investigated as a function of heat-treated temperature, holding time and chemical composition with their mechanical properties. From the experiment, the following results were obtained: The nucleation rate of apatite increased with increasing CaO or P₂O and decreasing MgO or TiO₂. Vickers hardness and bending strength of samples increased with increasing MgO or TiO₂ and decreasing CaO or P₂O. Vickers hardness of samples increased due to the precipitation of apatite, whitlockite, β-wollastonite, magnesium titanate, and diopside crystal phases within glass matrix. The final crystalline phase assemblages and the microstructures of the samples were found to be dependent on glass compositions, heat-treatment temperature, and holding time.

이종 접합부재의 계면균열에 대한 파괴인성의 평가방법

정남용,박철희 崇實大學校 生産技術硏究所 2002 論文集 Vol.32 No.-

The application of bonded dissimilar materials to such indurstries as automobiles, aircraft, rolling stock, electronic devices and engineering stuctures is increasing gradually because these materials, compared to the homogeneous materials, have many advantages for material properties. In spite of such wide applications of bonded dissimilar materials, the evaluation method of fracture toughness on interface crack in the bonded components has not been established clearly. In this paper, the stress intensity factors were analyzed by boundary element method(BEM) for the bonded scarf joints with a crack, respectively. From static fracture experiments of the bonded scarf joints, an evaluation of fracture toughness on interface crack in the bonded components was proposed and discussed.

흰쥐 뇌에서 Tyrosine Hydroxylase분비세포의 출현시기 및 분포에 관한 면역조직화학적 연구

정윤영,선희매,김영택,김남훈,안계훈,장인엽,김종중,문정석,강양수 조선대학교 부설 의학연구소 1999 The Medical Journal of Chosun University Vol.24 No.1

The immunohistochemical (ABC method) studies on the ontogeny and localization of the catecholamine-synthesizing enzyme tyrosine hydroxylase (TH) were examined in rat brain from the 12th fetal day until the 9th postnatal day. The results obtained were as follows : 1. Tyrosine hydroxylase was first detected immunohistochemically at embryonic day 13(E13). At this stage, the TH-containing neurons were still migrating and cytologically immature. 2. The changes occuring from the early to the late prenatal stages of development appeared to be the result of an increase in the number and size of the TH-containing cells and in the length of nerve fibers. 3. The distribution of the TH-containing neurons at embryonic day 19(E19) more closely resembled catecholaminergic neurons in the adult rat brain : 1) a rhombencephalic group became the A1-7 ; 2) a ventral mesencephalic group became A8-10 ; 3) a ventral prosencephalic group and a few neurons ventral to the striatum became A11-14 ; and 4) the cells of the olfactory bulb corresponded to the A15. 4. The cytodifferentiation of the TH-immunoreactive neurons was accompanied by continued migration to form the collective catecholaminergic groups during ontogenesis. In addition, the morphology of the TH-immunoreactive neurons in the late prenatal stage resembled in the adult rat brain.

친환경주거의 계획 및 기술요소 적용특성에 대한 한ㆍ일 사례비교

정유선,유복희,남규현,윤정숙 대한건축학회 2004 대한건축학회논문집 Vol.20 No.9

The purpose of this study is to accumulate basic data to establish planning direction and planning factors for the environment-friendly apartment complex by clarifying general concept and mark of It For this purpose, the field study has been conducted to the environment-friendly apartment complex m Korea and Japan The major findings of this study are as follows, 1) The basic concept of planning factors for environment-friendly apartment complex are natural harmony, Improvement of residents' health & amenity, energy & resources saving and response to the social change 2) For Japan, the planning factors and technical elements for the environment-friendly apartment complex were applied In the whole range of apartment complex with various and Positive methods For Korea, On the other hand, application of the planning factors of energy saving, resources saving and minimizing environment pollution was insufficient 3) To rectify vulnerability of environment-friendly apartment complex in Korea, It is necessary to establish applicable planning factors and technical elements fitting in with our actual condition, to bring up of environment-friendly housing by support of government and to make effort to spread necessity for It

QoS를 보장하기 위한 DiffServ-MPLS 연동 기법

정경택,한철민,김남희,정동수 국립7개대학공동논문집간행위원회 2004 공업기술연구 Vol.4 No.-

In an IP network, various types of traffics are statistically multiplexed to utilize efficiently the network resources.The DiffServ-MPLS supports a wide variety of communication services with different QoS requirements. The DiffServ-MPLS based on QoS architecture had become one of the most promising ways to guarantee QoS Multi-service IP network. But how to manage IP network with QoS guarantee is still an open issue. In this paper, we propose DiffServ-MPLS buffer management technique using the specified policing, queuing, and scheduling.

치과기공사들의 호흡기 자각증상 및 관련요인

정희선,이무식,김남송 대한보건협회 2002 대한보건연구 Vol.28 No.2

본 연구는 치과기공사들의 호흡기 및 근골격계 자각증상에 관한 호소율과 관련요인을 조사 분석하여 직업성 질병을 예방하고 효율적인 건강관리와 작업 환경 개선을 위한 기초자료를 제공하고자 실시하였다. 연구대상을 전국의 치과기공소(실)에 근무하고있는 치과기공사를 무작위로 추출하여 우편 설문조사에 응답한 265명 이었으며 조사기간은 2000년 12월부터 2001년 3월 까지였다. 수집된 자료는 Spss 8.0프로그램을 사용하여 X2-test와 로지스틱 회기분석을 통하여 다음과 같은 결론을 얻었다. 조사대상자의 성별에 따른 일반적 특성을 분석한 결과 연령, 결혼상태, 흡연여부, 음주여부와 유의성이 있었고 직무특성 분포에서는 치과기공경력, 담당업무, 직위에 따라 유의성이 있었다. 호흡기 장애 호소율을 분석한 결과 평소시침 호소율(55.5%)이 가장 높게 나타났고 다음은 담.가래(52.5%), 숨참.숨헐떡임(42.6%), 콧물.코감기(39.2%), 숨쉴 때 소리(23.4%)순이었다. 로지스틱 회귀분석에서 평소기침 호소율에 유의한 영향을 준 요인으로는 직위였고, 담.가래는 직장소재지였으며, 콧물.코감기는 성별, 연령, 결혼상태, 직위였다. 이상의 결과로 볼 때 치과기공사들의 신체 자각증상 호소율은 비교적 ?? 나타났으며 효율적인 건강 관리와 작업환경 개선을 위해 치과기공과 재학생들에게도 치과기공 재료들의 유해성에 대한 보건관리 교육 실시 및 재료등의 유해성 방지를 위한 전문 연국기관이 요구되며 치과기공사들의 적극적 자기관리와 치과기공소 운영자의 정기적인 작업환경 측정으로 쾌적한 환경유지가 필요하다. 또한 치과기공사들의 직업적 특성을 고려한 건강관리 교육 및 전용의료기관을 지정하고, 정기 건강검진을 실시하여 질병 예방의 제도적 장치가 필요할 것으로 판단된다. The purpose of this study was to serve as a basis for the protection of dental technicians from occupational diseases, more successful health care for them, and the betterment of working environment, by examining their complaints about respiratory subjective symptom and the relevant factors. The study subjects were 265 dental technicians who were randomly selected from dental technology shops nationwide and respondent to a mail survey. The survey was conducted from December 2000 to March 2001. The collected data were analyzed with SPSS 8.0 program, and X^2-test and logistic regression analysis procedures were utilized. Dental technicians suffered coughing in ordinary time(55.5%), phlegm and sputum(52.5%%), shortness of breath(42.6%), nasal discomfort(39.2%). Major predictors to suffer coughing in ordinary time on multiple logistic regression analysis were position in the office, phlegm and sputum were location of work area and nasal discomfort were sex, age, marital status and position in the office. The above-mentioned findings showed that the dental technicians suffered highly from physical subjective symptoms of respiratory system. S0 there are some suggestions about mere efficient health care and better working environment: dental technology students should receive healthcare education to leam the harmfulness of dental technology materials, and a specialized research institution is needed to make a deep study of addressing the harmfulness of the materials. Dental technicians have to pay more attention to their own health care, and dental technology manager should check out working environment on a regular basis to maintain a comfortable environment. In addition, healthcare education should be provided to dental technicians in consideration of their vocational characteristics, and specific medical institutions for dental technicians should be designated. And a regular health examination should be conducted to prevent any possible occupational diseaede.

Centering to the boys' high school team : 남자 고등부를 중심으로 Centering to the boy's high school team

남궁옥,원충희 公州大學校스포츠科學硏究所 1995 스포츠科學硏究所論文集 Vol.- No.9

29 Boy's High school Hockey teams took part in the 36th National Assortment Hockey Championship Series, the 74th national Athletic Meeting and '94 Springtime National man and women Hockey competition which were held in 1993. Investgating the number of shooting and success rate in 43 games, I came to conclusion as follows : 1) In whole shooting, the number of shots in the area D was 48.89%, in the area B was 27.91%, in the area C was 19.07%, in order of shootings (p<.10). Success rate of shooting was about 26% in each A, B and C area, and it was comparatively high. 2) In angle shooting, the area Ⅲ marked 62.78% which was the highest success rate.(P<.10). The area Ⅳ marked 20.37%, and the area Ⅱ 13.19%. The success rate of shooting in the area was Ⅱ, Ⅲ, Ⅳ 23.73%, 23.60%, 20.91% which suggests the balanced distribution. Especially the success rate of shooting in the area I was 50%. and it says that boldness in shooting is very necessary. 3) In many kinds of shootings, penalty corner shooting was 39.44%, assist by pass was 23.89%, loose ball was 14.63%(P< .50). The score of penalty corner shootings was 35.78% which marked the highest goals. In assist by pass, solo dribble, free hit and penalty corner except penalty stroke, the success rate of shooting was 23.75% on the average. 4) At the position of stick used in shooting, fore position was the highest frequeney in use. It was 91.1%(P< .01). One touch action shooting was 59.63% which marked the highest frequency in shooting(P< .05). The rate of score was 51.22%, but in the success rate of shooting, direct action shooting is higher 32.18% than that. 5) Hit and push shooting was 84.07% of the whole shootings. Push shooting was the best in the rate of score(P< .05). In the success rate of shooting, flick shooting(51.35%), was higher than push shooting (27.27%).

남자 비만 어린이 보행주기의 생체역학적 분석

정남주,윤희중 한국운동역학회 2001 한국운동역학회지 Vol.10 No.2

최근 우리나라의 비만 어린이의 수가 증가한 것으로 보고되고 있으나 비만 어린이의 증가와 더불어 이에 수반되어지는 사회적 관심은 그렇게 높지 않은 것 같다. 비만아동의 일반적인 보행형태에 대한 역학적인 정보는 극히 제한적이며 이에 관련된 과학적 정보 역시 상당히 부족한 것으로 나타났다. 본 연구는 성장기에 있는 비만 어린이의 보행형태에 대한 역학적 특징을 살펴보기 위하여 실시하였다. 이를 위해 규칙적인 운동프로그램에 참여하고 있으며, 또한 생리적으로 비만 판정을 받은 어린이 7명을 선별하였다. 2대의 비디오 카메라를 이용하여 각 대상자별 보행동작을 촬영하였으며 DLT(direct linear transformation) 방법을 활용하여 3차원 좌표 및 위치 정보를 산출하였다. 그리고 힘 측정판(force plate)을 이용하여 지지시 지면반력을 측정하였다. 분석결과 다음과 같은 결론을 얻었다. 활보장에 대한 하지장의 비는 일반인에 비해 다소 작은 값을 보였으며, 활보시간동안 지지기의 시간은 짧아진 반면 스윙시간은 길어진 것으로 나타났다. 보행 시 인체중심의 좌우변위가 선행연구에 비해 큰값을 보이고 있었다. 대퇴분절각도는 선행연구결과와 비슷한 결과를 보이고 있었으나 무릎관절과 발목관절각도는 획일화된 움직임을 보여 안전한 지지를 하지 못하는 것으로 나타났다. 수직지면반력(Fz)은 제1피크(Fz1)가 제2피크(Fz3)에 비해 더 큰 결과를 보여 선행연구와 비슷한 결과를 보이고 있었다. 그러나, 전후지면반력(Fy)은 추진력(Fy2)이 제동력(Fy1)에 비해 더 큰 값을 보이고 있어 일반 성인과는 정반대의 결과를 보이는 것으로 나타났다. The main objective of this study is to investigate the characteristics of the gait patterns of the obese children. According to surveys, the number of the obese children has increased in recent years, Nevertheless, little attention has been paid to this problem. Approaches through mechanical analysis on this particular problem are extremely limited and scientific information is hardly sufficient. To conduct an investigation, seven children were selected, who are deemed obese by any standards. These children are the participants of the exercise program that was designed to reduce weight. The physical activities of these children are video-taped by two video cameras. Using the DLT(direct linear transformation) method three dimensional coordinate and position data were calculated. Ground reaction forces are measured by AMTI force plate, The results are as follows. Lower extremity length in the stride of the obese children turned out to be less than that of adults. At the same time, the length of stance time was shortened while swing times was lengthened during the stride. Furthermore, it was discovered that the right-left movement of the center of mass was greater than the one indicated by the previous studies. It was also observed that the angle of the knee and ankle joints of the obese children appeared to be relatively restricted compared with those of adults. During the stance, the first peak(Fz1) is greater than the second peak(Fz3) in vertical force. But, propelling force(Fy2) is greater than breaking force(Fy1) in anterior-posterior force. It is show that the gait pattern of the obese children is not similar to that the normal adult. To conclude, the gait patterns of the obese children is unnatural.