• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1128_1129
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• 2009

본 논문에서는 Ni-MH전지를 가로등용 독립형 태양광발전시스템의 전력저장장치로 적용하고 충방전제어기를 설계하고 시스템을 구성하여 운전특성을 분석하였다. 태양전지모듈은 170W Sanyo사의 HIP-170N1을 사용하였고 전력저장장치는 Ni-MH 전지를 적용하였으며 부하인 가로등용 램프로는 24V, 45W 삼파장 램프를 사용하여 가로등용 독립형 태양광발전 시스템을 구성하였다. 또한 충방전 제어기를 구성하여 Ni-MH 전지의 충방전 특성을 분석하였다. Ni-MH 전지의 충방전 전압은 27V 좌우로 안정적으로 충방전이 되고 있음을 알 수 있었으며 축전지의 온도 상승도 15시 이후에 최고 $35^{\circ}C$로 나타났다. 이는 Ni-MH전지에 적용한 충전 시스템이 온도에 의하여 충전 말기 전압을 제어하기 때문으로써 축전지의 과충전 현상을 방지하여 축전지의 수명을 증가할 수 있을 것으로 판단되어진다.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.58 no.4
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• pp.451-454
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• 2009

The $\beta-In_2Te_3$ single crystal was grown by vertical Bridgman method. The $\beta-In_2Te_3$ single crystal had a face centered cubic(fcc) structure. The lattice constants were found to be $a\;=\;0.617\;{\AA}$. The direct optical energy gap ($E_g$) was found to be 1.11 ev at 300 K. Raman spectra peak of $\beta-In_2Te_3$ single crystal showed the low $E_{LO}$ mode at $105\;cm^{-1}$. The electrical conduction type was measured by the thermal method and was p-type. The electrical conductivity was found to be $1.8\;{\times}\;10^{-2}\;{\Omega}^{-1}cm^{-1}$ at 300 K. The activation energy was found to be 0.51 eV.

• Microbiology and Biotechnology Letters
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• v.30 no.1
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• pp.91-97
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• 2002

Removal of malodorous gases from swine manure by a polyurethane biofilter inoculated with heterotrophic and autotrophic bacteria was investigated. Ammonia, hydrogen sulfide and other gases could be efficiently treated at 3~3.6 second of empty bed retention time by the polyurethane biofilter. In the range of SV $200~l,200h^{-1}$ , the average removal efficiency of odor was about 89% when the odor unit of inlet gas was below 4100. Odor elimination capacity of the polyurethane biofilter was$ 1.8$\times$10^{5}$ $~5.0$\times$10^{7}$OUㆍm$^{-3}$ㆍ$h^{-1}$ that were 84~90% of the inlet load. The critical loads of $NH_3$ and $H_2$S, which mean 97% removal with respect to the inlet loads, were 31 and $27 g.m^{-3}$ ㆍ$h^{-1}$ , respectively. The maximum elimination capacities of $NH_3$ and $H_2$S were 56 and $157 gㆍm^{-3}$ ㆍh$^{-1}$ , respectively. Although the removability for$ NH_3$ and $H_2$S was not influenced by $H_2$S$NH_3$ ratio (ppmv/ppmv), the $H_2$S removability was inhibited by high $H_2$S concentration more than 80 ppmv.

• Quality Improvement in Health Care
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• v.6 no.1_2
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• pp.38-46
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• 1999

Background : To evaluate the frequency and cause of return to the emergency department within 48 hours and to identify the nature of the problem. Methods : We reviewed the medical records of 76 patients who returned to the emregency department within 48 hours from September 1998 to February 1999. Results : Overall revisit rate within 48hours was 2.6%. Of 76 patients, 5(6.6%) had planned return, 64(84.2%) had unplanned return and 7(9.2%) had incomplete documentation. The causes of unplanned return were inadequate medical management (11.8%), discharge against medical advice (27.6%), return after scheduled ambulatory care (22.4%), and unavoidable revisit due to symptom aggrevation or development of new symptom (22.4%). Conclusion : The study provided a basic information for us to improve the quality of emergency care by reducing unnecessary return to the emergency department. It is necessary to monitor continuously the quality of emergency care and to develop the standard of emergency return rate.

• Journal of Korean Library and Information Science Society
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• v.37 no.2
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• pp.47-72
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• 2006

Recommended book lists make 'a good book' known and help choose the books. Currently, the recommended book lists published by various institutions are primarily used as the selection tool for choosing children's and young adults' book in many libraries and schools. Considering this reality, I examined the present production condition of the recommended book lists and evaluated whether they were suitable as a selection tool. Afterwards, I suggested the development methods about how the recommended book lists will be developed for them to function as a selection tool.

• Journal of Korean Library and Information Science Society
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• v.40 no.1
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• pp.405-431
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• 2009

The purpose of this study was to analyze the experience of dysfunctional family's sons and daughters in bibliotherapy program. To do this, this study collected its data through writings, speaking and term papers of 6 undergraduate students experiencing bibliotherapy program. The collected data were analyzed by phenomenological methods. As a result, the participants experienced 1) recognition of trauma and problems, 2) sympathy and identification, 3) self insight and self understanding, 4) expressing their will to recover trauma and finding solutions, 5) affirmative change, maturity and healing. And also they went through thinking and feeling dynamically in the bibliotherapy program. These results show that the bibliotherapy program helps dysfunctional family's sons and daughters solve their problems and trauma.

• Journal of Korean Library and Information Science Society
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• v.35 no.2
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• pp.273-295
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• 2004

This study intends for providing a methodological foundation for information behavior research. To the end, we classify the 'Minority Groups' into two separate groups, ethnic minority and socio-economic minority. Then we reviewed the relevant literature with emphasis on analyzing the methodological characteristics. In details, our focus was on identifying the queries and variables of the collected major articles, and on introducing the methods used for data collection and interpretation in those articles.

• Journal of Korean Library and Information Science Society
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• v.47 no.4
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• pp.241-264
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• 2016

This study aimed to examine multicultural acceptance of librarians and to investigate the factors affecting librarians' multicultural acceptance. For this, this study collected its data through a questionnaire conducted for the public librarians. The total 319 questionnaires were collected and 292 were finally analyzed. The results showed that the factors affecting the multicultural acceptance of the librarians were the experience of overseas residence, of multicultural service and of multicultural education. Based on the results, the ways to cultivate librarians' multicultural acceptance were discussed.

• Journal of Applied Reliability
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• v.16 no.4
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• pp.331-337
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• 2016

Purpose: The purpose of this study is the analysis of the failure mechanisms effect of circuit design characteristics of the ballast for LED Lamp Methods: Recently, electronic circuit of ballasts for LED lamp are being occurred on various failure mechanisms (whiskers, ion migration, heat dissipation problem, switching element damage) because electronic ballast circuit design characteristics are becoming more and more diverse. Results: we analysis failure mechanisms that occurs in accordance with the circuit design characteristics The ballast for LED lamp were divided into three different types (Type A, Type B, Type C) considering circuit design characteristics (thermal design, PCB patten spacing, element material) and it was experimented in the acceleration test conditions ($85^{\circ}C$, 85% R.H). Conclusion: We confirmed that failure mechanism of the ballast for LED Lamp had occurred differently in accordance with the circuit design characteristics.

• Journal of Environmental Health Sciences
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• v.34 no.2
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• pp.170-174
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• 2008

The strains of Salmonella othmarschen and Norovirus isolated from outbreak A, the funeral ceremonies incidents in Ouri-shi of Oyeonggido in, 2007, were subjected to genotyping by using PFGE and extraction of RNA by using RT-PCR. 24 Salmonella othmarschen were isolated from 37 cases (patients 12 cases, cookers 4 cases, foods 7cases, knife, kitchen board, dish towel 4 cases, etc) and PFGE patterns showed that 22 strains isolated from the same incident were almost of the same pattern and 2 strains exhibited 50% of the pattern. Antimicrobial susceptibility patterns were such that there were 22 case susceptibility patterns and 2 case resistance patterns (strain 4: AM, CF, CIP, NA, TE TIC and strain 13: CF, CZ). Norovirus G1 (1case), Norovirus G2 (7cases), Norovirus G1,G2 (1case) were detected by using RT-PCR. The fine typing ability and reliability of PFGE and BioNumerics are helpful for establishing out the foodborne pathogens of outbreaks.