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      • 기혼여성의 여가활동과 가족스트레스 및 자아실현의 관계

        곽한병,서승석,이기찬 한국스포츠리서치 2005 한국 스포츠 리서치 Vol.16 No.2

        The purpose of this study was to examine how participation of leisure activities influences the job stress and self-actualization. Subjects of this study were sampled 300 the married women by the cluster random sampling method. To analyse the data collected for this study SPSS 11.0 was used for t-test, ANOVA, regression and path analysis. Based on the procedures and results. the following conclusions were warranted : First, the type of leisure activity among married women has an influence on family stress. That is, there is difference in the family stress according to the type of leisure activity, and sport activities is the more low. Second, the type of leisure activity among married women has an influence on self-actualization. That is. there is difference in the self-actualization according to the type of leisure activity, and sport activities is the higher. Third, the level of leisure activity among married women decrease family stress and increase self-actualization.

      • 수계형 아크릴 점착제의 제조

        곽윤철,조주익,신기석,박은석,함현식 明知大學校 産業技術硏究所 2003 産業技術硏究所論文集 Vol.22 No.-

        Abstract - Removable protective adhesives for automobiles were synthesized by the emulsion polymerization of monomers, such as n-butyl acrylate(BA), n-butyl methacrylate(BMA), acrylonitrile(AN), acrylic acid(AA) and 2-hydroxyethyl methacrylate(2-HEMA), in which AA and 2-HEMA were functional monomers. Emulsion polymerization was conducted with a semi-batch type reactor. Tensile strength, extension, peel strength, viscosity and solid content of the synthesized adhesives were measured. In addition, acid resistance, alkali resistance and smoke resistance were also examined. As a result, with 0,43 mol of BA, 0,57mol of AN and 0.14~0.21 mol of BMA, the tensile strength, extension and peel strength of the synthesized adhesives satisfied the standard of removable protective adhesives for automobiles.

      • KCI등재

        우리나라 물류전문기업 육성 모델

        남기찬,곽규석,송용석,연정흠 한국해운물류학회 2003 해운물류연구 Vol.38 No.-

        본 연구는 선진국과 국내 물류전문기업(3rd Party Logistics: 3PL)의 현황을 살펴보고, 시사점을 도출하며, 이를 바탕으로 우리나라 국제물류전문기업 육성 모델을 제시하는 것을 그 목적으로 한다. 특히, 선진국의 물류전문기업들이 글로벌 물류네트워크를 구축하는 과정에서 채택한 물류기업간 인수·합병 및 전략적 제휴에 초점을 맞추고 있다. 선진국 물류전문업체들의 발전 과정과 국내 물류기업들의 의향 조사 결과 정기선사와 컨테이너터미널 운영사가 국제물류전문기업으로 발전할 가능성이 가장 높은 것으로 나타났다. 또한, 물류부문의 단계적규제철폐, 물류시장 개방 등으로 인하여 인수·합병 및 전략적 제휴가 확산될 수 있는 여건이 조성되고 있는 것으로 나타났다. 따라서 정기선사, 컨테이너터미널 운영사 등을 중심으로 물류기업의 구조조정을 추진하는 것을 물류전문기업 육성 모델로 제시하고, 이를 촉진시킬 수 있는 제도적 지원책의 필요성을 제시하였다. This study aims at providing a conceptual model for promoting 3rd party logistics in Korea by analysing overseas and domestic logistics companies. Particular attention is paid to the merges and acquisitions among the companies. By the insights derived from the experience of advanced countries and through the empirical survey on the preference for merges and acquisitions of logistics companies in Korea, both the liner shipping company and the container terminal operator are revealed as the most preferred ones leading the merges and acquisitions. The logistics market environment represented by deregulation and freedom for new entry also seems to favor for such merges and acquisitions. Therefore, we suggest that as a conceptual model for promoting 3rd party logistics in Korea.

      • KCI등재

        니켈촉매를 이용한 메탄의 부분산화에 의한 합성가스 제조

        김상범,신기석,박은석,곽윤철,천한진,함현식 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.1

        메탄의 부분산화에 의하여 힙성가스를 제조하였다. 촉매는 니켈 담지 촉매를 사용하였으며, 담지된 니켈의 양은 10-15 wt%이었다. 담체로는 BaO, CaO, MgO를 사용하였다. 촉매는 함침법으로 제조하였으며, 반응은 CH_4:O_2의 비가 2:1, 1 atm, 750℃에서 수행하였다. 반응결과, MgO를 담체로 사용하였을때 가장 좋은 촉매활성을 보여주었으며, 니켈의 담지량이 13 wt%일때 촉매의 활성이 가장 좋았다. 이 13 wt% Ni/MgO 촉매의 경우 80%의 메탄 전화율과 93% 및 94%의 CO 및 H_2 선택도를 각각 얻을 수 있었다. 또한 이 촘매는 약 180시간 정도의 반응 후에도 촉매의 활성이 감소하지 않았다. 논란 중인 반을 기구에 대하여 조사해 보기 위하여 펄스방식으로 반응물을 투입하며 촉매 상 · 하층의 온도를 측정하였고, 반응시간에 따른 반응물과 생성물의 몰수 변화, 그리고 O_2-TPD 실험을 수행하였다. 그 결과 메탄으로부터 합성가스가 생성되는 경로는 2단계반응으로써 메탄이 완전 산화되어 CO_2와 H_2O가 생성되고, 이 생성된 CO_2 및 H_2O가 미반응 메탄과 각각 개질반응을 하여 합성가스가 생성됨을 알 수 있었다. Synthesis gas producution by partial oxidation of methane has been investigated using BaO, CaO and MgO supported Ni catalysts. The catalysts were prepared by the impregnation method. The reaction was carried out at I atm, 750℃, and CH_4:O_2=2:1. The highest catalytic activity was obtained with MgO support when Ni loading was 13 wt%. With the 13 wt% Ni/MgO catalyst, methane conversion was 80%, and CO and H_2 selectivities were 93% and 94%, respectively. The activity of the catalyst remained nearly constant after 180h of the reaction. To investigate the reaction mechanism of this reaction, the temperature of the actalyst bed at top and products were determined with time; and O_2-TPD experiment was carried out. From the results, it is deduced that the reaction takes place by a two-step reaction-first, total oxidation of methane to CO_2 and H_2O takes place, and then the produced CO_2 and H_2O are further reacted with CH_4 to give synthesis gas.

      • Propylene Aromatization에 미치는 온도 및 촉매의 영향

        박진우,김상범,곽윤철,신기석,박홍수,함현식 한국유화학회 2002 한국응용과학기술학회지 Vol.19 No.2

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

        [Ga]-MFI and H-ZSM-5 catalysts were synthesized under atmospheric pressure and used in the propylene aromatization. The effect of temperature on the product distribution was also investigated. The catalytic activities of the prepared catalysts were compared with the commercialized H-ZSM-5 which was converted from NH_4-ZSM-5. In the propylene aromatization, product distribution does not depend on the ratio of Si/Ga_2 with [Ga]-MFI catalyst, but depend on the ratio of Si/Al_2 with H-ZSM-5 catalyst. [Ga]-MFI catalyst shows better dehydrogenation and alkylation activities than H-ZSM-5 catalyst. The addition of Ga to H-ZSM-5 catalyst increases the conversion of propylene, selectivity to aromatics, and alkylation. In the propylene aromatization, the selectivity to aromatics slightly increased with increasing temperature with [Ga]-MFI catalyst, while slightly decreased with increasing temperature with H-ZSM-5 catalyst.

      • 소의 심장 cytochrome c oxidase의 전자전달 특성

        李相稷,呂基淑,李在亮,郭天錫,尙瑛錫 嶺南大學校附設 基礎科學硏究所 1988 基礎科學硏究 Vol.8 No.-

        Cytochrome c oxidase (complex Ⅳ) was isolated from bovine heart mitochondrion. The spectra of isolated cytochrome c oxidase which was considered to be oxidized showed absorption bands at 598nm and 421nm in the oxidized form and at 604nm and 443nm in the reduced form. The activity of cytochrome c oxidase measured by the redox system of ferrocytochrome c-oxygen was not affected by NH₄OH and ethylenediamine. It was, however, found that 2-mercaptoethanol and potassium cyanide inhibited its reactivity respectively.

      • 미토콘드리아 Cytochrome b5의 계면활성제를 사용한 분리ㆍ정제

        李相稷,李상鎬,權英愛,郭天錫,呂基淑 嶺南大學校附設 基礎科學硏究所 1988 基礎科學硏究 Vol.8 No.-

        Cytochrome ?? was separated from the mitochondrion of bovine heart. The spectrum of the cytochrome was that of oxidized one and reduced one was produced on reducing it with sodium hydrosulfite. The reduced cytochrome b? showed its absorption bands of alpha, beta and gamma. A surfactant Triton X-100 facilitated the isolation of the cytochrome from the mitochodrion.

      • Multiple Fault Detection on a Coaxial Cable via TFDR

        Kwak Ki-Seok(곽기석),Tae Sung Yoon(윤태성),Jin Bae Park(박진배),Jae Won Koh(고재원) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7

        In this paper, we considered multiple faults detection on a coaxial cable through Time-Frequency Domain Reflectometry (TFDR). It is well known that TFDR has high resolution accuracy for detecting and estimating the fault detection on a coaxial cable. This approach was based on time-frequency signal analysis and utilized a chirp signal multiplied by a Gaussian time envelope. The Gaussian envelope provided time localization, while the chirp allowed one to excite the system interest. We carried out experiments with 10C-FBT coaxial cable having either one or two faults. The result shows TFDR can be extended to detect multiple faults with high accuracy on a coaxial cable.

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