• Proceedings of the Korean Vacuum Society Conference
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• 2012.08a
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• pp.196-196
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• 2012

염료감응 태양전지는 실리콘 태양전지에 비해 단가가 낮고 반투명하며 친환경적 특성으로 차세대 태양전지로 주목을 받았으나 염료의 안정성의 문제와 특정 파장대의 빛만 흡수하는 단점을 가지고 있다. 이러한 문제점을 해결하기 위하여 양자구속 효과에 의해 크기에 따라 밴드갭 조절이 용이하여 다양한 파장대의 빛을 흡수 할 수 있는 양자점 감응태양전지가 많은 관심을 받고 있다. 하지만 양자점 감응 태양 전지의 활성층으로 사용되는 반도체 산화물인 이산화티타늄의 두께는 $13{\sim}18{\mu}m$로 짧은 확산거리로 인해 전하수집의 한계를 가지고 있다. 이를 극복하기 위해 인듐 주석 산화물 나노선을 합성하여 전자가 광전극에 직접유입이 가능하도록 해 빠른 전하이동 및 전하수집을 가능하게 한다. 인듐 주석 산화물 나노선은 증기수송 방법(VTM)을 이용하여 인듐 주석 산화물 유리 기판 위에 $5{\sim}30{\mu}m$ 길이로 합성하였다. 전해질과 전자가 손실되는 것을 방지하기 위해 원자층 증착법(ALD)을 이용하여 이산화 티타늄 차단층을 20 nm 두께로 코팅한 후 화학증착방법(CBD)을 이용하여 인듐 주석 산화물 나노선-이산화 티타늄 코어-쉘 구조를 만든다. 마지막으로 황화카드뮴, 카드늄셀레나이드, 황화아연을 증착시킨 후 다황화물 전해질을 이용하여 양자점 감응 태양전지를 제작하였다. 특성 평가를 위해 전계방사 주사전자현미경, X-선 회절, 고분해능 투과 전자 현미경을 이용하며 intensity modulated photocurrent spectroscopy (IMPS), intensity modulated voltage spectroscopy (IMVS)를 이용하여 전하수집 특성평가를 하였다.

• Proceedings of the Korean Society of Crop Science Conference
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• 2000.11a
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• pp.46-78
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• 2000

This paper is to introduce recent collaborative activities in agricultural weather information services among institutions in Korea as well as key concepts for understanding agrometeorological services. KMA and RDA have agreed upon the establishment of the Joint Committee for Agrometeorolgy at national level to strengthen the national agrometeorological services in data collection, information production, research, and services to end-users of agrometeorological information in Korea. Several on-going joint projects in agrometeorology by RDA/KMA are introduced in brief. The projects being developed are : Strengthening of the Joint Committee of agrometeorology, Extension of observation network for agricultural weather, Production of the detailed agrometeorological information based on numerical weather forecasts, Development of seasonal and interannual weather forecasts for agricultural applications, Information network system for supporting agrometeorological research, and Improvement of agrometeorological information services at national and regional level. Strengthening of programs for the education and training of agrometeorologists will be impending responsibilities of the government. The government must consider establishment of organizations dedicated to and in charge of national agrometeorological services to end-users. RDA and KMA should play a major role to obtain this goal, based on a close cooperation with universities, scientific societies, and other relevant institutions. If this plan is successful, major infrastructures and services in agrometeorology shall be established in the next 5 years, and we can contribute to regional and global societies through sharing experiences and know-hows.

• The Journal of Industrial Distribution & Business
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• v.9 no.2
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• pp.27-38
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• 2018

Purpose - This study centers on field surveys aimed at deriving the customer satisfaction factors of customer support centers that are positioned between suppliers and consumers in the supply chain. They consists of manufacturing, sales, distribution, consumption and collection, and that are in charge of core functions for suppliers' customer satisfaction management and consumers' satisfaction with consuming activities. Research design, data, and methodology - The customer satisfaction factors of customer support centers were derived through literature review and expert opinion surveys, and a questionnaire was developed through a process of the refinement of variables using pilot tests and 330 questionnaire sheets were distributed. The questionnaire sheets were collected and opinions in them were analyzed using fuzzy AHP methodology. Results - Three factors, which are turnover intentions, motivation, and job satisfaction, were derived as customer satisfaction factors of customer support centers, and the ranking relationships of these three factors were analyzed. In addition, the ranking relationships among six execution variables of turnover intentions, 10 execution variables of motivation, and 10 execution variables of job satisfaction were analyzed using fuzzy AHP methodology to obtain quite significant results. Based on the results of this study, three implications in the three strategic aspects and an implication in the academic aspects are presented. Conclusions - Motivation and job satisfaction, job satisfaction and turnover intentions, and motivation and turnover intentions are not formed by independent or different factors or environments. They are in the same context with each other (maintaining high correlations) and are in the relationships of virtuous circles in which they complement each other.

• International Commerce and Information Review
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• v.12 no.3
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• pp.3-34
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• 2010

The purpose of this study is first to identify the dimensions of a trade show's service quality and the dimensions of the exhibitors' show performance, and thereafter determine the relationship between the trade show's service quality and the exhibitors' show performance. This study attempted empirical research, together with a literature review, to discover the effect of service quality upon on exhibitors' performance. A survey was conducted during an international trade show that was held in Korea where more than 100 businesses participated. The sample was selected from among the people who were in charge (e.g., managers) of their own private businesses. As a result, the study validated nine dimensions of a trade show's service quality: host and public relations, security, reputation and reliability, access, customer service, exhibition program, physical facilities, convenient facilities, and attendance cost. The study also identified five dimensions of the performance of participants: sales performance, information collection, networking, image building, and motivation. Overall, the empirical results of this study verified that there is a correlation between the performance of exhibitors and the service quality. of trade shows.

• Journal of Korean Society of Water and Wastewater
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• v.28 no.5
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• pp.517-527
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• 2014

As sewer flooding frequents due to localized and concentrated stormwater and increased non-permeable surface area after urbanization, building cities with sound water recycle and accordingly efficient management of rainwater is demanded. To do this, the existing sewage (including rainwater) fee imposition system should be philosophically evaluated. This study presents problematic issues of the existing domestic sewage fee imposition system considering the principle of sharing costs on the service of sewage and rainwater collection and treatment. Four methods to improve the existing sewage fee imposition system are suggested: 1) imposing stormwater fee according to Polluter Pays Principle, 2) clarification of the share of public sector, 3) reducing or exempting the sewerage fee for inhabitants reducing urban runoff by constructing their own rainwater management facilities, 4) imposing charge for discharging rainwater to sewers due to new development action. Short, mid, or long term planning for rainwater management is recommended considering the situation of each municipality.

• Korean Journal of Occupational Health Nursing
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• v.22 no.2
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• pp.75-82
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• 2013

Purpose: This study is to investigate the effect of nurse's competency empowerment and boss' job competency recognition on work performance. Methods: 216 nurses participated for data collection which was conducted from September 1, 2011 to September 10, 2011. The collected data were analyzed with SPSS/WIN 16.0 and with frequency test, ANOVA, Scheff$\acute{e}$ test and Multiple regression. Results: Firstly, the work performance in accordance with subject's general characteristics was found to be significant in the 50s, graduate school or higher education, Roman Catholic, charge nurse and 21-years or older. Secondly, the correlation among nurse's competency empowerment, boss' competency recognition and work performance was found to be positively related (r=.501~.639, p<.001). Thirdly, competency empowerment was found to be the most effective factor for work performance, followed by boss' competency recognition and career year, and these factors accounted for 63.5%. Conclusion: As the results show that the work performance is highly affected by the nurse's competency empowerment, boss' competency recognition level and career level in clinical environment, effective education programs are required to provide an appropriate experience to both entry-level and experienced nurses, as well as to enhance boss' competency empowerment at the same time.

• Architectural research
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• v.16 no.1
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• pp.17-25
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• 2014

This research is to restructure the public assessment of housing management in a standardized fashion, and a self-administered questionnaire survey was employed for data collection and analysis. In doing so, all the assessment tools nationwide were identified and assembled to extract the items included in the survey form. The survey form was mailed out to local officers in charge of housing management and professional housing managers in the nation, and the responses were statistically analyzed in order to structure the standard assessment tool of housing management. This research classified 3 main areas (General Maintenance, Operation and Community Living) in evaluating the housing management performance, and identified 35 essential items and 52 optional items. The 35 essential items were drawn from the 16 categories of the 3 areas (11 items of 5 categories for General Maintenance, 7 items of 4 categories for Operation, and 17 items of 7 categories for Community Living), and the rest 52 optional items were from the 16 categories of the 3 areas (24 items of 7 categories for General Maintenance, 26 items of 7 categories for Operation, and 2 items of 2 categories for Community Living). While all the items in the research are quantifiable, it's suggested that qualitative measurements be complementarily utilized in the assessment not only to explore the best practices of housing management but also to refine and modify the standardized tool in response to various environmental changes. As the public assessment of housing management is context-sensitive and critically related to local housing profile, the continuous implementation of the assessment will facilitate shifting the housing paradigm from production and consumption to management and reproduction.

• Journal of Engineering Education Research
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• v.14 no.3
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• pp.45-54
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• 2011

The purpose of this study is to analyze performance problems in establishing and improving program educational objectives (PEO) and to set up action strategies for the civil engineering program at the A university. To fulfill the purpose, according to the typical needs analysis model, research problems were defined, current conditions and desired conditions were identified, discrepancies and their reasons were examined, and action strategies were derived. Current conditions and desired conditions were identified by analyzing the A civil engineering program's self study report, conducting surveys and interviews with constituents. After the discrepancies and the reasons were examined, performance problems and field force analysis were conducted to draw short term and long term action strategies to improve PEO. Short term action strategies were to announce PEO to current students, to hold faculty seminars to establish and to improve PEO, to renew the list of constituents regularly, to composite an annual milestone, to define roles of the committees, and to enforce educational opportunity toward industrial advisory board members. For the long term strategies, improvement and documentation of PEO assessment system, collection and analysis of constituents' suggestions, establishment of effective accreditation support system, and arrangement of compensation system for the faculties who are in charge of engineering education accreditation responsibility.

• Journal of ILASS-Korea
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• v.7 no.2
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• pp.7-15
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• 2002

A particle flow visualization, electrostatic charging measurement and separation of triboelectrically charged particles in the external electric field by a fluidized bed tribocharger are conducted for the removal of PVC particles from mixed waste plastics. The laboratory-scale triboelectrostatic separation system consists of the fluidized bed tribocharger, a separation chamber, a collection chamber and a controller. PVC and PET particles can be imparted negative and positive surface charges respectively due to the difference of triboelectric charging series between particles and particles in the fluidized bed tribocharger, and can be separated by passing them through an external electric field. To visualize these charged particles, He-Ne laser is used with cylindrical lenses to generate a sheet beam. In the charging measurement, the particle motion analysis system (PMAS), capable of determining particle velocity and diameter. is used to non-intrusively measure particle behavior in high strength electric field. The average charge-to-mass ratios of PVC and PET particles are $1.4\;and\;1.2{\mu}C/kg$, respectively. The highly concentrated PVC (91.9%) can be recovered with a yield of about 96.1% from the mixture of PVC and PET materials for a single-stage processing. The triboelectrostatic separation system using the fluidized tribocharger shows the potential to be an effective method for removing PVC from mixed plastics for waste plastic recycling.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.05c
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• pp.71-74
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• 2003

Photoconductor for direct detection fiat-panel imager present a great materials challenge, since their requirement include high X-ray absorption, ionization and charge collection, low leakage current and large area deposition, CdTe is practical material. We report studies of detector sensitivity, That is an CdTe with $5{\mu}m$ thickness on glass. That is hybrid layer of depositting ZnS:AgCl phosphor with $100{\mu}m$ on CdTe. The leakage current of hybrid is similar to it of a-Se, but photocurrent is larger than a-Se. Both of them have high spatial resolution, but hybrid has higher sensitivity than a-Se at comparable bias voltage.