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      • 건물 구조체 이용 수평형 지열시스템의 채열량 예측에 관한 연구

        이영모 청주대학교 2013 국내석사

        RANK : 1871

        Recently, the reduction of energy consumption in buildings and the use of renewable energy become social issues, and an interest in geothermal systems is increasing. In particular, the building integrated geothermal system using has been ground heat exchanger in terms of economy and efficient use of land. Ground-source (geothermal) heat pump (GSHP) systems can achieve a higher coefficient of performance than conventional air source heat pump (ASHP) systems by utilizing the relatively stable underground temperature. The market for these systems in Korea has grown remarkably over the past few years due to efforts to improve the drilling method and reduce the installation cost of ground heat exchanger (for example, utilizing the building pile and foundation as ground heat exchanger. However, it is difficult to optimally design the system due to the absent of quantitative data such as operator data, performance data, so on. In order to predict the performance of horizontal geothermal system using underground structure, this research has developed the method of prediction on the ground heat exchange rate with three-dimension ground heat transfer model. Furthermore, the measurement of underground temperature in basement was conducted to decide the boundary condition of simulation. The result of measurement was compared with it of calculation by the prediction model for the underground temperature. Furthermore, the revised model will be applied to the prediction model of heat exchange rate for the horizontal BIGS. In this research, the simulation method for a building integrated geothermal system (BIGS) using a horizontal heat exchanger has been developed to couple with groundwater and heat transfer model, ground heat exchanger model and surface heat transfer model. This paper introduces about the summary of the simulation method and describes about the prediction and measurement of surface temperature for setting boundary conditions. In this results, the heat exchanger rate of ground heat exchange for BIGS system was found as 27.4 W/㎡. using the developed simulation there was still the difference between the calculation result by the revised model and measurement result , but the verification of the prediction model for surface temperature was improved. More detail analysis for the factors of difference will be conducted through the additional measurement and survey.

      • 대학 태권도 선수의 자기관리 전략이 운동열정, 운동정서, 인지된 경기력에 미치는 영향

        이영모 단국대학교 교육대학원 2012 국내석사

        RANK : 1855

        The purpose of this study was to examine how the self management of Taekwondo players effects on the sports passion, exercise emotion and cognitive performance. The subjects were 300 of Taekwondo players registered on the 2012 Korea Taekwondo association and performed the questionnaires using the convenience sampling and 294 sets besides the 6 sets that were answerd neglectedly are practically used for the analysis. Statistical techniques to analyze above data was processed by Frequency analysis, Factors analysis, Pearson correlation analysis, Multiple Regression of SPSS 18.0. The results of this analysis summarized as follows. First, the study showed that self-management has an effect on sports passion statistically. The college Taekwondo players of self-management significantly influences on sports passion partially. Second, The study showed that self-management has an effect on exercise emotion. The college Taekwondo players of self-management significantly influences on exercise emotion partially. Third, The study showed that self-management has an effect on cognitive performance. The college Taekwondo players of self-management significantly influences on cognitive performance. fourth, The study showed that sports passion has an effect on exercise emotion. The college Taekwondo players of sports passion significantly influences on exercise emotion. Fifth, The study showed that sports passion has an effect on cognitive performance. The college Taekwondo players of sports passion significantly influences on cognitive performance. Sixth, The study showed that exercise emotion has an effect on cognitive performance. The college Taekwondo players of exercise emotion significantly influences on cognitive performance. 이 연구는 대학 태권도 선수의 자기관리 전략이 운동열정과 운동정서 그리고 인지된 경기력에 미치는 영향관계를 규명하는데 그 목적이 있다. 연구대상은 2012년 현재 대한태권도협회 산하 경기단체 등록한 남・여 대학 태권도 겨루기 선수를 모집단으로 선정하였다. 이 들 가운데 2012년 대한태권도협회 주관으로 실시되는 제39회 전국대학 태권도개인선수권대회에 참가한 대학부 남·여 태권도 겨루기선수들 가운데 편의표본추출법을 이용하여 300명을 표집 하였으며, 실제분석은 294부를 이 연구에 활용하였다. 사용된 통계프로그램은 SPSS 18.0 프로그램을 사용하였으며, 통계자료 분석 기법은 빈도분석, 요인분석, 신뢰도분석, 상관분석, 다중회귀분석을 이용하여 다음과 같은 결론을 도출하였다. 첫째, 대학 태권도 선수들의 자기관리전략의 하위요인인 대인관리요인은 운동열정의 하위요인인 강박열정에 그리고 훈련관리와 대인관리는 조화열정에 각각 유의한 영향을 미친다. 둘째, 대학 태권도 선수의 자기관리요인의 하위요인인 훈련관리요인은 운동정서의 긍정적 정서부분인 자부심과 행복에, 신체관리는 긍·부정적 부분인 행복, 사랑, 분노, 슬픔에, 정신관리는 행복에, 대인관리는 불안에 각각 유의한 영향을 미친다. 셋째, 대학 태권도 선수의 자기관리의 하위요인인 훈련관리요인은 인지된 경기력의 하위요인 정신적인 태도와 사고, 시합 중 자신감의 수준, 노력의 양, 기술의 질, 신체의 느낌, 집중력, 타이밍과 리듬, 시합에서 기대했던 수행과 실제 수행과 비교 등 모든 요인에, 정신관리는 노력의 양, 신체의 느낌, 집중력에, 대인관리는 정신적인 태도와 사고, 기술의 질, 집중력에, 신체관리는 신체의 느낌과 타이밍과 리듬에 각각 영향을 미친다. 넷째, 대학 태권도 선수의 운동열정 하위요인인 강박열정은 운동정서의 하위요인인 행복, 사랑, 분노, 슬픔에, 조화열정은 운동정서의 긍정적 요인인 자부심, 행복, 사랑, 부정적 요인인 분노, 슬픔, 불안에 영향을 미친다. 다섯째, 대학 태권도 선수의 운동열정 하위요인인 강박열정은 인지된 경기력의 하위요인인 시합 중 자신감의 수준, 기술의 질, 신체의 느낌, 집중력에, 조화열정은 정신적인 태도와 사고, 시합 중 자신감의 수준, 노력의 양, 기술의 질, 신체의 느낌, 타이밍과 리듬, 집중력, 시합에서 기대했던 수행과 실제 수행과 비교 등 인지된 경기력 하위요인 모두에 영향을 미친다. 여섯째, 대학 태권도 선수의 운동정서의 긍정적 정서요인인 자부심은 정신적인 태도와 사고, 시합 중 자신감의 수준, 노력의 양, 기술의 질, 신체의 느낌, 집중력, 시합에서 기대했던 수행과 실제 수행과의 비교에, 행복은 노력의 양, 신체의 느낌, 집중력, 시합에서 기대했던 수행과 실제 수행과의 비교에, 사랑은 노력의 양, 시합에서 기대했던 수행과 실제수행과의 비교에 정적 영향을, 부정적 정서요인인 슬픔은 신체의 느낌에, 불안은 노력의 양, 신체의 느낌, 집중력, 시합에서 기대했던 수행과 실제 수행과의 비교에 부적영향을 미친다.

      • 재순환유동 전산해석을 위한 RANS 난류모델의 영향성 분석

        이영모 과학기술연합대학원대학교 2016 국내석사

        RANK : 1855

        Recirculating flow appears from a variety of sources, such as automobiles, rail, rocket. The pressure drag is generated due to the difference between the base pressure and the pressure in the freestream and It is known to occupy a large proportion in the total drag. However, even though a lot of research progress domestically and internationally, there are still many difficulties in accurately forecasting due to the recirculating flow as the associated complex flow such as reattach and redevelopment of turbulent flow. Therefore, it improves the predictive performance of the standard k-ε and the realizable k-ε models with high efficiency and accuracy by modifying the constants of the turbulence models in this study. but the standard k-ε and the realizable k-ε models are not reflect the rotation of the flow and the curvature effect because they are developed based on the Boussinesq assumption. Thus, by applying curvature correction model to the standard k-ε, the realizable k-ε model are to improve the forecasting performance of the recirculating flow. In addition, we set the model constants as design variables based on three backward facing step flow analysis and we confirm the relationship between the model constants and the recirculating flow by applying the DOE(design of experiments) method. Numerical analysis is carried out for the base flow, representing the recirculating flow. First, the computational analysis is performed on a subsonic flow past the rocket with support and we assess the prediction performance of base flow with a small freestream angle. In the supersonic flow, the computational analysis are carried out about the flow over the afterbodies using the SST model. It confirm the base flow changes in compressibility correction and curvature of the afterbodies edge in the supersonic flow from the analysis results. In addition, the RANS 2-equation and Reynolds stress models are assessed the prediction performance of a recirculating flow through the backward facing step flow and the base flow analysis results and the prediction performance of standrad , realizable k-ε are improved by applying the model constants appropriate for the recirculating flow prediction. 재순환유동은 자동차, 고속철도, 로켓 등 다양한 곳에서 나타나게 된다. 재순환유동에서 발생하는 낮은 압력과 자유류와의 압력차로 인해 압력저항이 발생하게 되고, 이러한 압력저항(기저저항)은 전체 저항에 많은 비중을 차지하는 것으로 알려져 있다. 하지만 재순환유동의 경우 난류유동의 재부착 및 재발달 유동 등 복잡한 유동을 동반함에 따라 국내외적으로 많은 연구가 진행되었음에도 불구하고 아직도 정확히 예측하는데 많은 어려움이 있다. 따라서 본 연구에서는 높은 효율성을 나타내는 standard k-ε, realizable k-ε 모델의 상수를 수정함으로써 재순환유동에 대한 예측성능을 개선하였다. 여기서 standard k-ε, realizable k-ε 모델은 Boussinesq 가정을 기반으로 개발된 모델이기 때문에 유동의 회전변형률과 유선의 곡률효과를 잘 반영하지 못한다. 따라서 standard k-ε, realizable k-ε 모델에 곡률수정모델을 적용하여 재순환유동의 예측성능을 개선하고자 하였다. 또한 세 가지 후향계단유동 해석결과를 바탕으로 모델상수를 설계변수로 설정하고 재부착길이를 목적함수로 설정 후, 실험계획법(design of experiments)을 수행하여 모델상수와 재순환유동과의 관계를 확인하였다. 재순환유동의 대표 예인 기저유동에 대한 전산해석을 수행하였다. 로켓을 지나는 아음속 유동에 대해 전산해석을 수행하였으며, 미소 받음각을 갖는 로켓에서 나타나는 기저유동 예측성능을 평가하였다. 초음속 유동장 내에서는 후부동체에 대해서 SST 모델을 활용하여 전산해석을 수행하였으며, 초음속 유동장 내에서 압축성 보정효과가 기저유동 예측에 미치는 영향 및 후부동체 모서리 곡률에 따른 기저유동 변화를 확인하였다. 또한 후향계단유동과 기저유동 계산을 통해 RANS 2-equation 모델과 레이놀즈 응력모델의 재순환유동 예측성능을 평가하였다.

      • 한국에 있어서 부패통제를 위한 NGO의 활동 분석 : 참여연대와 경실련의 활동을 중심으로

        이영모 안동대학교 대학원 2001 국내석사

        RANK : 1855

        It is the most significant change of the 21st century that society is governed by economic principles. The economic principles are implemented without regard to nations and doctrine. The nation is asked to establish its credibility in order to make the nation flourish. However, widespread corruption in the society becomes the major factor which has a negative impact on a nation's credibility. Even though previous Korean governments made an effort to fight corruption, the desired results were not achieved. Corruption seems to be a serious problem even in the present government, what is called, “the government for the people.” This study aims at providing helpful suggestions to NGO and looking for effective ways to deter corruption by analyzing the activities of NGO. After realizing the importance of deterring corruption and the lack government's ability. NGO takes the place of the government based on historical background and Korean circumstances. My study examines the activities of the two leading groups; Peoples' Solidarity for Participatory Democracy (PSPD) and Citizens Coalition for Economic Justice (CCEJ). PSPD is regarded as the outstanding anti-corruption organization among NGO and CCEJ works to deter corruption. The activities of the organizations were investigated from the foundation of organizations to the first half of the 20th century. Generally, internal and external factors of the two organizations require consideration from all aspects because of their close connection with deterring corruption. Among PSPD and CCEJ, two independent organizations play an important role in deterring corruption. One is the organization for making society clean and the other is the organization for rooting out illegality and corruption. The results of my thesis show that PSPD and CCEJ have common problems in relation to deterring corruption regarding the internal factors of the organizations. In the view of human resources the absence of members, uneven distribution of staff and lack of specified manpower are the main problems. Regarding material resources these groups are operated with insufficient financial funds and limited chances, which makes it difficult for the public and group members to express their opinions when decisions are made. Regarding the external factors of the organization, PSPD and CCEJ showed the same problems after analyzing their relationship with the government. The two organizations didn't put much effort on examining the legal and structural measures of the government for solid financial aids. These groups were busy restraining the government corruption so that opinions from other organizations were rarely applied to the government policy. Both PSPD and CCEJ have difficulty in deterring corruption because they put too much emphasis on increasing their budget to invest in corruption cases. The two organizations neglect the duties of decreasing the number of investigations against corruption and considering moral conscience and responsibility. The rallies of both organizations were small, isolated and decentralized to deter corruption. Also, these organizations failed to make their rallies nationwide event. and include the public because their activities were conducted by a distinguished family. After considering the problems, it is required to find some self-help programs from civic groups and some support from the government in order for the civic groups to carry out effective corruption deterrent programs. First of all, the following refers to the self-help programs of civic groups. These are some plans concerning internal factors of organizations; plans for human and material resources, and plans for democratic decision making. Regarding external factors of organizations' civic groups should have a close relationship with the government, keeping self regulation and identity. When civic groups build up goals and plans, various strategies should be considered for comprehensive corruption deterring. Specific activity plans which tie the public together should be examined. After the government takes poor financial conditions of civic groups into consideration the indirect support plan from the government should be provided rather than direct financial fund. It is necessary to eliminate the major obstacles which do not allow charitable funds from the public to be absorbed into the civic groups. Regarding the activities deterring corruption, it is urgent to think over the possible suggestions to deter corruption within the condition of not destroying self regulation and identity of civic groups.

      • 不動産仲介制度의 問題點과 改善方案

        이영모 漢城大學校 行政大學院 1993 국내석사

        RANK : 1855

        The purpose of this study is to review issues included in the real estate brokerage system currently being introduced in Korea, laying stress on presenting ideas for improvement to contribute to the establishment of a sound real estate brokerage order, to settle the system of certified brokers whose qualifications are earned through public examination, and to develop the real estate business into a professional one. This study is based on literature study, actual field experience as a certified broker, and interviews with field brokers, due to the characteristics involved in the study. Chapter 1 deals with the purpose, scope and methodology of this study. Additionally, a variety of issues found in the real estate brokerage system in Korea is presented, to find ways to improve the system. Chapter 2 deals with describing the meaning and importance of real estate brokerage, along with the relationship between the activities of real estate brokers and the national economy. In particular, illegal broker activities are described in this chapter, along with the social effects resulting from such activities. And this chapter deals with the characteristics and history of the real estate brokerage system in Korea. The history of brokerage system can be divided into 5 periods. Those are the pre-three-dynasties era, Koryo dynasty era, Chosun dynasty era, era of Japanese rule and the Republic of Korea era. In this chapter, the Purpose of the current Real Estate Brokerage Law are also described, explaining the important content of the Law and compared with brokerage laws in force prior to the enforcement of this Law. Chapter 3 deals with the characteristics of the real estate brokerage systems in Japan, U.S.A., Taiwan and England. It was found that real estate brokerage systems in advanced countries are mostly operated under a licensing system, and the activities of real estate brokerage are carried out by expert professionals possessing specialized knowledge and qualifications. Chapter 4 deals with issues found in current real estate brokerage system. Issues are presented as follows: ① Unsettlement of certified broker system. ② Imperfect examination system for qualification of certified broker ③ Unclassification of real estate. ④ Imperfect control over brokers without licenses, and too heavy penalties for illegal broker activities. ⑤ Irrational brokerage commission and sealing system ⑥ Function of Society for Real Estate Brokers. ⑦ Sharing of informations concerning real estate. ⑧ Designation of too many land areas subject to transaction regulations, etc. Chapter 5 deals with improvements for the real estate brokerage system. They are as follows: ① All-out enforcement of certified broker system, and supplements to qualification examination system ② Precise classification of real estate. ③ Reinforcement of strict control on brokers without license, and adjustment of penalties. ④ Improvement of real estate transactions market ⑤ Activation of Society for Real Estate Brokers. ⑥ Relaxation of real estate transaction regulations, etc.

      • Cisplatin에 의한 신장조직 손상에서 N-acetylcysteine의 보호효과에 관한 연구

        이영모 충남대학교 대학원 2007 국내박사

        RANK : 1855

        Background : Cisplatin-induced nephrotoxicity is a complex syndrome involving several mechanisms that include altered renal hemodynamics, apoptosis, inflammation, mitochondrial injury, oxidants, direct DNA damage. The renoprotective effects of N-acetylcysteine(NAC), a well-known anti-oxidants, have been proved in many experimental models of acute kidney injury. The aim of this study was to investigate the cytoprotective effect of N-acetylcysteine in a cisplatin-induced nephrotoxicity model of rats. Methods : Twenty male Spraque-Dawley rats were divided into 4 groups. 1. S group (n=4), 2. N group (n=4), were injected with the same dose of N-acetylcysteine intraperitoneally as NC group 3. C group (n=6), were subjected to renal toxic injury by injection of cisplatin (7 mg/kg, single, intraperitoneal injection) 4. NC group(n=6), were injected with N-acetylcysteine 30 minutes before and at the time of cispaltin injection via intraperitoneal route(500mg/kg). After 96 hours of cisplatin injection, the rats were sacrificed for tissue collection and blood sampling. Hematoxyline & Eosin stained kidney samples were analyzed to evaluate the extent of tubular necrosis quantitatively. Biochemical parameters such as BUN, serum creatinine were also measured. RT-PCRs for TGF-β, TNF-α, Bcl-2, Bax and Fas mRNA were performed to evaluate the pattern of renal gene expression. Immunoblottings for p-JNK, p-ERK, cleaved caspase-3 were also performed to investigate whether MAP kinases are involved in cisplatin induced nephrotoxicity and the renoprotective effect of N-acetylcysteine . Results : Serum level of creatinine was 2.85±0.6 mg/dL in NAC treated cisplatin group, significantly lower than that of C group (0.73±0.16 mg/dL, p<0.05). On light microscopic examination of kidneys, NAC treated cisplatin group showed significantly lower renal injury score than that of untreated cisplatin group. The levels of Bax, Fas, TNF-α, TGF-β gene expressions of NAC treated cisplatin group were significantly lower than those of untreated cisplatin group(all, p<0.05). The level of Bcl-2 gene expression in NAC treated cisplatin group was significantly higher than that of untreated cisplatin group(p<0.05). The level of phophorylated ERK gene expression in NAC treated cisplatin group was significantly higher than that of untreated cisplatin group (p<0.05). The level of phophorylated JNK gene expression in NAC treated cisplatin group was significantly lower than that of untreated cisplatin group (p<0.05). Conclusion : We propose that NAC has a renoprotective effect and may ameliorate the renal funcion in cisplatin induced nephrotoxicity rat model.

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