• 한국산학기술학회논문지
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• 제15권6호
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• pp.3813-3820
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• 2014

최근 전기 사용량이 증가하면서 전력수요와 공급능력의 불균형으로 인하여 전력예비율은 점차 감소되고 있으며, 전력 공급의 신뢰성도 떨어지고 있다. 이러한 배경 하에 전기저장장치(Battery Energy Storage System)는 수요관리의 유력한 수단 가운데 하나로써 중요성이 점차 부각되고 있다. 하지만, 이차전지를 이용한 전기저장장치는 아직 고가이므로 전력계통에 도입하여 운용하기 위해서는 경제성 평가가 필수적이다. 따라서, 본 논문에서는 전력회사용 BESS의 경제성평가를 위하여 BESS를 고려한 전원베스트믹스와 축사근사법을 이용하여, BESS의 도입 전 연간 운용비용과 BESS의 도입 후 연간 운용비용을 비교하여 최적의 BESS 도입용량과 도입비용을 산정하는 알고리즘을 제안하였다. 또한, 수용가용 BESS의 경제성평가에서는 피크세이빙 및 부하평준화 기능을 통하여 수용가의 기본전기요금과 사용량전기요금을 감소시켜 최대한의 메리트를 추구하는 경제성평가 알고리즘을 제시하였다. 제안한 알고리즘을 이용하여, 모델 전력계통과 수용가(교육기관)를 대상으로 BESS의 경제성을 분석하여, 본 논문에서 제시한 알고리즘의 유용성을 확인하였다.

• 한국디지털건축인테리어학회논문집
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• 제2권1호
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• pp.9-15
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• 2002

As architectural forms tend to be large-scaled, high-storied and complicated, use of computer for processing design information has been generalized. However, CAD use in the process of developing architectural design has been neglected greatly in the educational field of architectural field due to the surging of recognition that it may limit the essential property of architectural design. It may be resulted from the limitation of CAD system, that is, it is because of tardy speed of application development for the related areas with the lack of simplicity and clarity of flexibility to be secured on the drawing and user interface. Recent CAD systems, however, overcome such a limitation, convert into object-based design from entity-based drawing, drafting and modeling for implementing design concept of architects and it connects with internet linked to superspeed information communication network and changes process and stream of architectural design. Therefore, this study deals with utility of object based CAD system with products of Autodesk Co. and consequently obtain the following conclusions. First, it expands architect's design areas by supporting cooperative design system based on model-based architectural design and internet. Second, it reduces consumption of personal and material resources and time in the process of drawing production for improving architectural design works. Third, it can reduce the frequent design changes by improving understanding of architectural space with visualization of immediate 3D information, escaping from traditional methods to deliver design information to building owner through 2D drawing or model and perspective drawing requiring much cost and time. Fourth, it keeps exactness without omission or duplication of design information and generate and renew information of all related drawings on a drawing. Fifth, it is possible to change difficult and boring architectural design work into a pleasure owing to immediate modeling and drawing of design idea. In addition, digital drawing generated by using object-based CAD system can playa role of establishing Urban Information System to be used for protecting from building in disaster and urban disasters in connection with GIS numerical map and be used for reference of all kinds of information required fro post-management of buildings. However, what is more important is that surplus time from introduction of object-based CAD system should be used for consideration to be recognized as a good space and building built as a product of this project for comfort to urban people.

• 농촌의학ㆍ지역보건
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• 제24권1호
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• pp.35-47
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• 1999

노인에서 처방약 복용에 대한 불순응의 문제는 의학적으로 심각한 문제의 발생과 경제적인 손실을 가져오게 된다. 이 연구는 1996년 7월 24 일부터 8월 13일 사이에 경상북도 김천시 금릉군에 거주하는 60세 이상의 농촌 노인을 대상으로 이루어진 단면적인 면접조사이다. 노인에서의 비고이적인 약물복용 불순응의 원인이 되는 약물복용 능력의 실태를 파악하고, 약물 복용능력과 건강상태, 일상적 생활 활동, 가족적 지지, 그리고 인지기능을 비롯한 다양한 변수, 일반적 특성 등과의 관련성을 조사 분석함으로써 약물 복용 실행능력을 예측할 수 있는 예측자를 찾고자 하였다. 현재 복용하고 있는 약물이 있다고 답한 사람은 48.8%였다. 93%가 혼자서 정확한 시간에, 정확한 용량으로 복용할 수 있다고 답하였고, 6%가 약간의 도움이 필요하다고 하거나 혼자 복용할 수 없다고 답하였다. 약물 복용 수행능력과 일반적 특성 및 연구 변수들간의 차이에는 연령과 교육수준, IADL, MMSE-K가 혼자서 독립적으로 복용할 수 없는 군 사이에 유의한 차이가 있었으며, 상관분석에는 ADL, IADL, MMSE-K, BDI가 유의한 상관이 있었다. 단일변수분석과 상관분석에서 약물 복용 능력과 유의한 관련성을 보인 변수를 선택하여 투입한 로지스틱 회귀분석에서 IADL과 성이 최종적으로 선택되었다. 다른 건강수준 측정법 보다 수단적 일상생활 정도는 약물복용 수행능력에 더 민감한 예측자로의 역할이 기대되므로 투약관리와 약물 복용 수행 능력에 대한 정신적 상태를 평가하는 고식적 방법에 추가정보를 제공할 수 있을것으로 판단된다. 추후 약물복용 순응도의 다면적인 면을 고려한 연구가 입 퇴원환자를 중심으로 한 정확한 투약 순응도와 규모 파악, 이를 향상시킬 수 있는 구체적인 방안을 모색하는 방향을 중재 연구와 인지기능 및 운동기등 등의 정신 및 신체조건에 따른 약물 복용 순응도에 초점이 맞춘 다양하고 집중적인 연구자 필요할 것으로 생각된다.

• 콘크리트학회논문집
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• 제18권3호
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• pp.389-395
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• 2006

실존하는 콘크리트 구조체를 평가할 때, 그 콘크리트의 강도를 알아내는 것이 매우 중요하다. 콘크리트의 강도를 알아내기 위하여 재하시험이나 코어시험을 하는 것은 시험비용, 편의성, 시간, 구조체에 대한 손상, 신뢰성등 많은 문제점이 있다. 그러므로 이러한 문제점들을 극복하기 위하여 여러 가지 비파괴 시험과 통게적 해석을 통한 구조해석법이 발전해 오고 있다. 본 연구에서는 재령 3, 7, 14, 28, 90, 180, 365, 730일에 대하여 28일 표준실린더 압축강도 65.0MPa인 고강도 콘크리트 구조체의 실제강도를 알기 위한 일련의 실험을 하였고, 각 실험결과를 SPSS 프로그램으로 회귀분석 하였다. 회귀분석에 의한 강도추정식과 코어강도값을 비교하여 오차율을 계산하고, 기존식과 비교하여 추정식의 유의성을 검토한 결과 기존식들은 보통강도 콘크리트에는 적용할 수 있지만 고강도 콘크리트에는 적용에 한계가 있음이 밝혀졌다. 따라서 40MPa 이상의 고강도 콘크리트의 슈미트 해머 시험에 의한 강도 추정을 위해 다음과 같은 강도식을 제안하였다.

• 한국지역사회생활과학회지
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• 제18권3호
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• pp.417-431
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• 2007

This study investigates the differences among residental areas in the health, standard of living, and social relationships of female elderly living alone. The total of 501 subjects(185 from rural areas, 159 from fishing communities, 77 from the islands, and 80 from urban areas) were questioned from May to July, 2006. The research area was confined to Chungcheong Province. The female elderly living alone of this study were an average of seventy-three years old, had a low cost of living, and received little formal school education. Over sixty percent(60.3) of them lived on less than thirty dollars a month which was the recognized Korean poverty level in 2006. The female elderly living alone were evaluated as being in good health, but they themselves perceived their health as being poor. Observed by residential areas, the subjects in urban areas were lower in ADL, and both the urban dwellers and the islanders appeared to be higher in their satisfaction with medical services as compared to those in rural areas and fishing communities. The fishing villagers showed the lowest standard of living for female elderly living alone. The analysis of social relationships as seen in the different residental areas revealed that the female elderly living alone g in urban areas tended to be receiving social supports rather than providing for others, and subjects living in fishing areas and the islands proved to be relatively higher in the exchange of social supports. In relation to offspring, the female elderly living alone in urban areas had a lower frequency of meeting with their children and also a lesser degree of intimacy with them because they lived at a distance. On the other hand, subjects living in rural areas and fishing communities had a higher frequency of meeting with their children and a greater degree of intimacy with them even if they lived at a distance. The study also showed that the female elderly living alone in the islands had a higher frequency of once meeting per three week with their offspring and a higher degree of intimacy with them because they all live in the same islands. In conclusion, the subject living in urban areas appeared to be isolated from their offspring as compared to the other seniors in the study. The female elderly living alone in urban areas suffered from an insufficient network of relatives and neighbors, and they experienced a poor quality of relationships to their offspring. Almost all of the lone seniors in the study had a low score in social activities; however, the female elderly living alone in urban areas revealed a higher level of participation in volunteer activities, group activities, and educational activities. Nevertheless, the lone seniors living in urban areas were not satisfied with their participation in social activities. The subjects living in rural in fishing communities and the islands showed more participation in money-making activities. This study suggests that the policies for female elderly living alone should reflect the differences of regional characteristics.

• 사상체질의학회지
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• 제23권1호
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• pp.115-124
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• 2011

1. Objectives : This study aimed to provide practical insights on the development of traditional Korean medical tourism and maximize the satisfaction of foreign patients. The main objectives of this study were also to evaluate Sasang Constitutional Medicine(S.C.M.) diagnosis cost from foreigners' perspectives. 2. Methods : For this study, the data were collected from tourists to Korea between January 3, 2010 to February 20, 2010. The sample used in this study was mainly composed of Japanese, Chines and US/Canada, because they are the major national visitor origin group to Korea. The primary data were collected by questionnaire survey using a standardized instrument with a convenience sampling procedure, and efforts of the interviews involved an on-site, self-administrated questionnaire to those sitting or visiting tourist attractions. The total size of the sample was 276 of which 275 showed no missing value against the factors needed for final analysis and were for analysis as an effective sample. SPSS 13.0 for window was used to analyze the collected data on which descriptive statistics and the Limited Dependent(LIMDEP) 8.0 program was used in estimating the willingness-to-pay(WTP) for traditional Korean medical tourism through the Contingent Valuation Method(CVM). A dichotomous choice question form of a CVM was applied to estimating the value. 3. Results and Conclusion: 1. There was significant statistical relationship between attributes when considering medical tourism destination and socio-demographic profiles such as age group, nationality, educational level and occupation. 2. In the level of recognition on Korean medicine, north Americans showed low level of recognition compared to other nationalities. In addition, in terms of age group, 20's and 30's showed low level of recognition on Korean medicine, 3. In relation to the level of interest on Korean medicine, Japanese respondents had higher interesting level on Korean medicine. Also singles had higher level of interest. 4. Regarding preferred Korean medical treatment program, there found significant statistical relationship between Korean medical treatment program and socio-demographic characteristics. 5. The estimating result of the logit model showed that the variables affecting the WTP for Sasang Constitutional medicine diagnosis were offered price and potential ability of medical tourism destination. 6. In relation to WTP for Sasang Constitutional medicine diagnosis, Japanese respondents showed a WTP of USD 62.69 and Chinese respondents showed USD 57.09. On the other hands, respondents from north America and other countries showed a WTP of USD 65.50. In conclusion, from this study, the results found that the opportunities in tradition Korean medical tourism are immense and the possible rewards are numerous. It is time to continue to promote 'Sasang Constitutional medicine' and make the Korean medical tourism programs considering on nationalities, age group, gender and WTP.

• Weed & Turfgrass Science
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• 제7권2호
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• pp.87-97
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• 2018

잔디는 공익적 기능, 오락 및 휴양 그리고 미적인 측면에서 인간에게 다양한 이점을 제공한다. 잔디병해는 골프장, 운동장, 공원, 잔디재배지 등에 피해를 일으키는 주요 원인이며 이를 방제하기 위하여 막대한 비용이 소요된다. 한국의 잔디병해 연구는 아직 다른 분야에 비하여 관심이 낮은 편이지만 잔디병해에 대한 연구의 필요성은 매우 높다고 본다. 본 연구에서는 지금까지 우리나라에서 이루어진 잔디병 관련 연구 결과들을 분석하고, 국내 잔디병 연구사를 정리하여 앞으로의 잔디병리 분야의 발전방향을 고찰하고자 한다. 연구논문은 국내학술지와 한국교육학술정보원에서 제공하는 논문탐색 시스템을 이용하여 잔디병과 관련된 논문을 수집, 분석하였다. 국내 잔디병과 관련된 논문은 약 80여 편이 한국잔디학회지에 게재되어 전체 논문의 50%를 차지하였다. 이 중 잔디병 방제에 대한 논문이 전체논문 대비 50%를 차지하였다. 잔디병해 별로는 라이족토니아마름병(large patch)에 대한 연구가 36%로 가장 많았으며 다음으로 동전마름병(dollar spot) 18%, 피티움마름병(Pythium blight) 10%, 설부병(Typhular blight) 8% 순으로 나타났다. 국내에서 처음으로 보고된 잔디병은 15종류이다. 잔디병 방제를 위하여 국내에 등록된 약제의 수는 542개로 갈색잎마름병, 녹병, 누른잎마름병, 동전마름병, 라이족토니아마름병, 설부소립균핵병, 여름잎마름병, 탄저병, 피티움마름병, 흰가루병과 조류에 등록되어 있다. 향후 우리나라에서 미보고된 잔디병해의 학문적 탐색과 병명의 정립이 필요하고, 효과적인 병방제를 위하여 잔디병에 대한 생리, 생태학적인 연구와 더불어 친환경적 방제 방법의 개발이 필요할 것으로 본다.

• 정보교육학회논문지
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• 제13권3호
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• pp.383-391
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• 2009

사이버가정학습체제는 사교육비 절감과 지역간 학력격차 해소, 학생들의 학력수준에 맞춘 수준별 학습실현 등을 통하여 정규학교교육의 문제점을 보완하고 궁극적으로는 공교육의 내실화를 목적으로 추진된 이러닝 학습체제이다. 본 논문에서는 사이버가정교사의 직무활동을 분석하고 직무활동에 대한 사이버가정교사 정보활용능력 요소를 도출하여 사이버가정교사 정보활용능력 요소에서 사이버가정교사 정보활용능력 평가기준을 마련하였다. 연구 결과 첫째, 사이버가정교사의 직무를 교수 학습, 상담 활동, 과정 운영 및 관리, 전문성 개발로 나누어 구조화 하였다. 이렇게 구조화된 사이버가정교사 직무 수행 활동은 사이버가정교사 정보 활용 능력 기준 요소를 추출하는데 기본적인 자료로 활용하였다. 둘째, 사이버가정교사의 직무 수행 활동에 기초하여 도출된 정보 활용 능력 요소는 총 53개의 요소로 정리하였으며 교원 ICT활용능력(ISST) 요소에 기초하여 사이버가정교사 정보활용능력기준(ISSCT)을 사이버 가정교사의 정보활용능력 평가기준으로 제시하였다.

• 보건행정학회지
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• 제8권2호
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• pp.1-24
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• 1998

There exists a general consensus in Korea that patients tend to concentrate in large hospitals and this tendency is partly responsible for inefficiency in health services. The process of choosing a medical care provider for health care services and evaluating the provider after utilization seems to involve many diverse factors to become very complex. Therefore a systemsatic study is needed to achieve sufficient understanding of the proeess. For this point of view, this study investigates patient's selection of medical care institution for delivery care services and their evaluation of the institution after delivery. In more specific, the objectives of the study are twofold: 1) to identify the factors associated with expectant mothers' choice of type of medical care institution for delivery among tertiary hospitals, general hospitals, small hospitals, and clinics: and 2) to understand the factors affecting patient evaluation of the medical care institution after delivery. The data used for the analysis were collected through face-to-face interviews with those women who had childbirth during the period from January 1, 1996 to the date of interview in February 1998. The survey was conducted using preqared structured questionnaire in Seoul. The sample was drawn from each of arbitrarily defined four regions of Seoul, Northeast, Northwest, Southeast and Southwest, in proportion to the number of births reported in 1996 in each of them. The distribution of the interviewed women by educational level was made similar to that of mothers of new babies reported in 1996. The sample size was planned to be about 300, but ended up with analytical sample of 319. Major conclusions emerged from the analysis can be summarized as follows: 1) Large hospitals were evaluated as much better for technical quality than other types of institutions, whereas they were compared similar to or worse for other attributes. And it was found that technical quality of care is considered as the most important condition of medical care institution for delivery, while the amount of direct cost is considered as the least important one. Taken together, the utilization of large hospitals is not likely to decrease even though they cannot give satisfaction to patients in other aspects than technical quality. 2) The activeness in the search for information affected the respondents' evaluation of medical care institutions, which would influence their later decision or recommendation to other persons as to the choice of source of health care services. Therefore, increased efforts should be directed to improving availability of useful and correct information for patients in relation to the utilization of health care services. 3) Since the findings of this study were obtained from the analysis of delivery care services, their applicability to other kinds of services may be limited. Thus it would be useful to conduct a comparative study of several kinds of services explicitly taking into account the characteristics of those services in the analysis.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2012년도 제42회 동계 정기 학술대회 초록집
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• pp.434-435
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• 2012

Plasma enhanced chemical vapor deposition (PECVD) silicon dioxide thin films have many applications in semiconductor manufacturing such as inter-level dielectric and gate dielectric metal oxide semiconductor field effect transistors (MOSFETs). Fundamental chemical reaction for the formation of SiO2 includes SiH4 and O2, but mixture of SiH4 and N2O is preferable because of lower hydrogen concentration in the deposited film [1]. It is also known that binding energy of N-N is higher than that of N-O, so the particle generation by molecular reaction can be reduced by reducing reactive nitrogen during the deposition process. However, nitrous oxide (N2O) gives rise to nitric oxide (NO) on reaction with oxygen atoms, which in turn reacts with ozone. NO became a greenhouse gas which is naturally occurred regulating of stratospheric ozone. In fact, it takes global warming effect about 300 times higher than carbon dioxide (CO2). Industries regard that N2O is inevitable for their device fabrication; however, it is worthwhile to develop a marginable nitrous oxide free process for university lab classes considering educational and environmental purpose. In this paper, we developed environmental friendly and material cost efficient SiO2 deposition process by substituting N2O with O2 targeting university hands-on laboratory course. Experiment was performed by two level statistical design of experiment (DOE) with three process parameters including RF power, susceptor temperature, and oxygen gas flow. Responses of interests to optimize the process were deposition rate, film uniformity, surface roughness, and electrical dielectric property. We observed some power like particle formation on wafer in some experiment, and we postulate that the thermal and electrical energy to dissociate gas molecule was relatively lower than other runs. However, we were able to find a marginable process region with less than 3% uniformity requirement in our process optimization goal. Surface roughness measured by atomic force microscopy (AFM) presented some evidence of the agglomeration of silane related particles, and the result was still satisfactory for the purpose of this research. This newly developed SiO2 deposition process is currently under verification with repeated experimental run on 4 inches wafer, and it will be adopted to Semiconductor Material and Process course offered in the Department of Electronic Engineering at Myongji University from spring semester in 2012.