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      • Tantalum Pentoxide 박막의 전기적 특성에 관한 연구

        장충근,송재용,이기선,강준길,김수용 충남대학교 1990 忠南科學硏究誌 Vol.17 No.2

        Thin tantalum pentoxide(Ta_2O_5) films were deposited by oxygenassisted pyrolysis of tantalum methoxide using LPCVD method and their UV-absorption characteristics, X-ray diffraction, surface structure and I - V characteristics were investigated. Ta_2O_5 films as grown were originally amorphous and became polycrystalline hexagonal δ-Ta_2O_5 after annealing at 800℃ in the nitrogen gas atmosphere for 4 hours. The structures of the si_3N_4 films deposited by LPCVD were basically amorphous but mixed micro crystallites were observed in the films. For the Ta_2O_5 films of about 1000Å thick, the leakage current density through the films was 10 exp (-7) A/㎠ at 5 MV/㎝. The leakage current density was high and breakdown voltage was low with respect to Si_3N_4, Ta_2O_5 films could make them attractive in multiplayer dielectric thin films for memory devices.

      • 부산지역 워터프런트의 기후특성에 관한 연구

        도근영,이한석,고성철,현번수,유종수 韓國海洋大學校 附設 海洋科學技術硏究所 2002 硏究論文集 Vol.11 No.2

        워트프런트는 도심 및 내륙지역과는 다른 독특한 기후특성을 가지고 있으며 이를 고려하지 않고 개발할 경우 시설물의 하자발생, 에너지 및 유지관리비용의 상승을 초래하게 됨은 물론 배후지, 도시기후에 악영향을 미치게 된다. 본 연구는 부산지역의 10개 기상관측지점을 해안선에서 거리에 따라 워터프런트 및 내륙지역으로 분류하고 5년간의 기상데이터를 이용하여 워터프런트의 기후특성에 대해 검토한다. 또한 원터프런트지역임에도 내륙지역과 유사한 기후특성이 나타나고 있는 대연지점을 대상으로 기후특성변화의 원인에 대해 검토한다. The waterfront has distinct climate characteristics different from urban or inland area. These may create not only the rise of energy and maintenance costs for facilities located at waterfront areas, but also negative effects on the climate of the nearby inland area, unless these are treated with particular care. For the present study, the climate characteristics of waterfront were examined with climate data of 10 observation points carefully selected in Busan area. Each weather observation point was classified into either waterfront area of inland area, based on the distance from the coastal line. Special considerations were given to the climate data gathered at the Dae-Yeon weather station because it shows the climate characteristics similar to those of inland area although it is located very near the waterfront area. Results indicates that this peculiar climate condition attributes, at least in part, to the reclamation of frontal coastal area.

      • 예·체능 전공 대학생들의 여가실태와 개선방향에 관한 연구

        박장근,정수현,임란희 명지대학교 예체능연구소 2003 藝體能論集 Vol.14 No.-

        The objective of this research which investigates the leisure activity form and a satisfactory degree of physical training and art university students and there is a place where it presents the improvement plan for this field In order to attain the objective of the research We executed self-admistration method question of the collection from 2001 May 21st until 2001 August 31st to 370 people physical traning subject 100 person, fine arts subject 100 person music 100 person baduk subject 70 person university students who are located in the H, K university in seoul and M, Y university in Kyonggi-Do It reveals from the research the following conclusion. 1. the leisure activity participation which it follows in personal quality and form quality analysis(1) views from result of the participation form the appreciation 27.3%, sports 26.8%, playing and amusement 26.8% it appeared the fact that it is the difference which considers form the sex the subject, the religion and the family economic leave. (2) According to the results of participation for one month, from the fourth to the sixth of attendance was 27.1 percent and from the third to the fourth of attendance was 24.1 percent. However, there were some differences in two items as major add religion. (3) From the result of the participation form due to the dwelling duration, from two hours to three hours was 35.7% percent. But there were some differences in gender as well. (4) From the result of the participation form due to the duration, over three years was 49.2 percent and there was no difference in this part. (5) From the result of the participation form due to the companion, a friend was 65.9%, other sex friend was 15.4% However, There were some differences in two items as major and grade. (6) From the result of the participation for due to the pocket money in one month, from 200,000 to 300,000 was 35.1 percent , from 100,000 to 200,000 was 23.0 percent, there were also some differences in two items as grade and the family economic level. (7) The result of the participation form which it follows in activity consuming expense is appeared that 10-30 thousand won below 48.1% and 10 thousand won 24.1%. It appeared the fact that there is the difference un the grad the family economic level. (8) The result of the participation form which it follows in hindrance activity, there are 39.7% economic power 30.8% It appeared the fact that there is the difference insufficient time in the subject the family economic level. 2. The evaluation scale regarding a leisure activity satisfactory analysis satisfactory degree is like that very at 5 scales of the Likert, (5 pieces), it is like that, (4 pieces), it is an usual, (3 pieces), it is not like that, (2 pieces), it is not like that very, (1 piece) with it evaluated, When it sees a leisure activity satisfactory moral investigation result, it appers Order broad way that stress solution average 3,87 (sd=.96) with to appear most highly ,friendship planning average 3.55 (sd=1.07) using of knowledge 3,29 (sd=.99) study ability improvement 3,09 (sd=1.10) physical strength increase 3.05(sd=1.23).

      • KCI등재
      • High-Volume 플라이애쉬 콘크리트의 기포조직에 관한 연구

        강수근,서완용,정철우,김영수 釜山大學校生産技術硏究所 2002 生産技術硏究所論文集 Vol.61 No.-

        산업 부산물인 플라이애쉬를 사용한 콘크리트는 내부에 존재하는 다량의 플라이애쉬에 의해 발생하는 공극의 분화 효과에 의해 보통의 콘크리트와는 다른 기포조직을 가질 수 있다. 콘크리트가 동결작용을 받을 시 발생하는 수압을 완화할 수 있는 기포의 영향범위는 기포간의 거리에 의해 결정되며, 이것의 최대값이 기포간격수라고 불리고 있다. 본 연구에서는 High-Volume 플라이애쉬 콘크리트의 기포조직을 카메라를 통하여 입력된 화상의 데이터를 컴퓨터에 의해 정략적으로 처리하는 화상분석법을 이용하여, 연행공기량과 플라이애쉬 콘크리트의 공기량, 비표면적, 기포간격계수 등을 보통 콘크리트와 비교, 분석함으로서 High-Volume 플라이애쉬 콘크리트의 기포조직을 파악하고자 한다. The purpose of this paper is to investigate the air-void spacing factor of high-volume fly ash concrete. For this purpose, the air-void spacing factor of the hardened fly ash concrete was determined by image analysis method for a large number of parameters adjusting such as air contents and the rate of fly ash replacement. Based on the study of the test results, the following conclusions may be drawn. 1) As the rate of fly ash replacement for high-volume fly ash concrete increases, air contents decrease. Furthermore the air content is varied approximately 1 % before and after hardening. 2) As the replacement of fly ash increases, the spacing factor increases due to adsorption of air entraining agent. 3) As the air content decreases and the specific surface increases, the spacing factor of High-Volume fly ash concrete increases.

      • KCI등재후보

        교흔으로 인해 발생한 Eikenella corrodens 간농양 1예

        고근준,이은재,최형섭,김상수,최정은,임환섭,김준명,이꽃실 대한감염학회 2004 감염과 화학요법 Vol.36 No.2

        E. corrodens는 면역저하 환자에서 주로 문제를 일으키며, 감염시 두경부, 폐, 복부 등에 위험을 초래할 수 있어 치료의 적절성에 대한 중요성이 부각되고 있다. Eikenella corrodens는 균 동정을 위해 CO₂의 공급을 필요로 하며 서서히 자라는 특성상 까다로운 배양조건을 필요로 하는 균주이다. 혐기성 균주이지만 metronidazole이나 clindamycin과 같은 항균제에는 반응을 안하는 특이한 항생제 감수성에 의해 보편적인 구강내 상재균에 대한 경험적 치료에 실패할 수 있다. 치료에 있어 잘못된 초기 항생제 선택이나 외과적 시술이 적절히 시행되지 않은 경우에 치료실패의 요인이 될 수 있으므로 적절한 항생제 사용과 함께 외과적 처치가 동반되어야 한다. 저자들은 정상 면역력을 가진 성인에서 사람에게 물리고 난 후 발생한 E. corrodens에 의한 간농양의 적절한 치료의 결과를 문헌고찰과 함께 보고하는 바이다. Eikenella corrodens is a slow growing, facultatively anaerobic gram-negative rod that is part of the normal flora of the oral cavity and upper respiratory tracts. In most patients with E. corrodens infections, host defenses are compromised due to surgery, or chronic debilitating illness such as malignancies, or immunosuppressive therapy. This organism causes abscesses and infections that are at times fatal. We experienced a case of E. corrodens isolated from liver abscess in an immunocompetent patient. A 50-year-old man who is a dentist, was hospitalized because of fever and myalgia of 10 days' duration. Abdominal ultrasonography showed non-septated, 3.8×4.6 ㎝ sized abscess in the segment 6/7 of the liver. E. corrodens was isolated from aspiration of liver abscess. This organism was presumably acquired from his patient's oral cavity during dental procedure. We hope that increased awareness to E. corrodens will raise the index of suspicion, and contribute to optimal management of these infections, minimizing the significant morbidity associated with this organism.

      • KCI등재

        한국 민간기업 근로여성의 육아휴직활용 패턴 영향요인 연구 : 고용보험 DB 분석을 중심으로

        이수영,이근주 梨花女子大學校 社會科學大學 社會科學硏究所 2011 사회과학연구논총 Vol.25 No.-

        여성인력의 지속적인 사회 참여가 국가경쟁력 확보에 결정적인 영향을 미친다는 인식의 확산과 함께 결혼, 임신 및 출산 등 여성 인력의 사회 진출에 부정적인 영향을 미쳐왔던 여건들을 개선하기 위한 다양한 정책들이 도입되고 있다. 그 중에서도 대표적인 것으로 육아와 관련된 일·가정 양립의 어려움을 완화하여 여성이 퇴직의 불안 없이 지속적으로 사회 활동을 할 수 있도록 지원해주는 육아휴직제도를 들 수 있다. 육아휴직제도는 도입된지 20년이 지났지만 아직까지도 육아휴직제도가 활발하게 활용되어 정책 본래의 목적을 달성했는가에 대하여는 논란이 있다. 이에 본 연구는 육아휴직제도의 활용에 영향을 미치는 요인을 고용보험 D/B를 분석하여 규명해 보고 있다. 육아휴직 사용여부, 육아휴직 사용기간, 육아휴직 사용 후 복직여부를 종속변수로 하여 각각에 영향을 미치는 요인들을 회귀분석을 활용하여 분석한 결과는 다음과 같다. 우선, 육아휴직의 사용은 직업의 안정성과 경력개발 의지에, 육아휴직 사용기간은 직접양육 의지와 경력개발의지에, 육아휴직 사용 후 복직여부는 직업의 안정성과 직접양육 의지에 가장 큰 영향을 받는 것으로 나타났다. 특히 고용안정이 육아휴직의 사용, 사용기간 및 육아휴직 사용 후 복직 가능성에 결정적 영향을 미치는 것으로 나타났다. 분석 결과는 우리나라 육아휴직제도의 정책의 본래 목적을 달성하기 위한 제도적 개선 등 정책적 시사점을 제공하고 있다. Concerns for national competitiveness and low fertility initiated many government policies and programs intended to improve the working conditions of the women labor force. Parental leave is one of the representative programs that allows women to take care of the family and maintain the employment at the same time. This research tries to understand the factors affecting the usage of parental leaves. The analysis of three regression models with parental leave, the duration of usage, and reinstatement as dependent variables respectively, showed following implications. First, the use of parental leave is mostly affected by the stability of employment and the person’s will of career development. Second, duration of parental leave is influenced by the person’s will of direct bringing and also the will of career development. Finally, reinstatement at the end of the leave is affected by the stability of employment and the will of direct bringing. The stability of employment and career development seem to play important roles in making parental leave decisions. Policy implications are discussed and policy suggestions are made based on the result of the analysis.

      • 비용 제약하에서의 소모성 동시조달부품의 최적구매량 결정

        吳根泰,金明洙 水原大學校 1998 論文集 Vol.16 No.-

        In this paper we consider the CSP requirement determination problem of new equipment(machine) system. For the newly procured equipment systems, mathematical analyses are made for the system which is constructed with the consumable parts to derive the associated CSP requirement determination model in mathematical expression. Based on these on these analyses, a mathematical model is derived for making an optimal CSP requirement determination subject to the constraint of satisfying any given fund limitation. We assume that the failure of a part follows a Poisson process. Firstly, the operational availability concept in CSP is defined and the relation between the general system availability and the operational availability concept in CSP is defined and the relation between the general system availability and the operational availability is established. Secondly, the problem is formulated as the operational availability maximization problem that should satisfy the fund limitation, and then, using the generalized Lagrange multipliers method, the optimal solution procedure is derived.

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