• 한국환경복원기술학회지
• /
• 제4권2호
• /
• pp.1-10
• /
• 2001

The purpose of this study was to investigate factors and variables which have significant effects on landscape satisfaction of urban pedestrian road in Bun-dang new town and to suggest basic information for urban pedestrian road design. These works consist of two phase. First, we tested the Hye-Cheon college students' degree of landscape satisfaction for 37 spots of urban pedestrian road and then selected 10 sports slide by the Sturges' formula. Second, we analysed factors and variables on landscape satisfaction of urban pedestrian road using the semantic differential scale method and then processed using descriptive analysis, factor analysis and multiple linear regression analysis. The major findings of this study can be summarized as follows; 1) The difference of landscape adjectives between the highest score of landscape satisfaction slide and the lowest score landscape satisfaction slide were diversity of vegetation, plenty of the shade of a tree, naturalness and cleanness. 2) Diversity of vegetation, width of road, freedom of danger and diversity of environment can be significant variables of major effects on landscape satisfaction of urban pedestrian road by using the multiple linear regression analysis. 3) Factors covering the landscape satisfaction of urban pedestrian road have been found to be Environment of urban pedestrian road and Constitution of urban pedestrian road. By using the Varimaxs' rotation factor analysis for the number of factors' cumulative percentage has been obtained as 64%. 4) Environment of urban pedestrian road and Constitution of urban pedestrian road can be significant factors of major effects on landscape satisfaction of urban pedestrian road by using the multiple linear regression analysis. In conclusion, the landscape satisfaction factors and variables of urban pedestrian road need to be considered in plan or design the urban pedestrian road.

• 한국해양공학회지
• /
• 제18권5호
• /
• pp.43-49
• /
• 2004

The lightness of components required in the automobile and machine industry necessitates the use of high strength components. In particular, the fatigue failure phenomena, which occurs when using metal, increases the danger to human life and property. Therefore, antifatigue failure technology is an integral part of current industries. Currently, the shot peening is used for removing the defect from the surface of steel, while improving the fatigue strength on surface. Therefore, in this paper, the effect of compressive residual stress of spring steel(JISG SUP-9) by shot-peening on fatigue crack growth characteristics in a stress ratio(R=0.1, R=0.3, R=0.6) was investigated, giving consideration to fracture mechanics. By using the methods mentioned above, following conclusions are drawn: (1) The fatigue crack growth rate(da/dN) of the shot-peening material was lower than that of the un-peening material and in stage I, ΔKth, the threshold stress intensity factor of the shot-peen processed material is high in critical parts, unlike the un-peening material. Also m, fatigue crack growth exponent and number of cycle of the shot-peening material, was higher than that of the un-peening material, as concluded from effect of da/dN. (2) Fatigue life shows more improvement in the shot-peening material than in the un-peening material, and the compressive residual stress of surface on the shot-peen processed operate resistance of fatigue crack propagation.

• 한국벤처창업학회:학술대회논문집
• /
• 한국벤처창업학회 2008년도 추계학술대회
• /
• pp.83-112
• /
• 2008

본 연구에서는 동물병원 창업을 중심으로 국내 기존 펫(pet) 창업자의 특성이 창업성공에 미치는 영향을 평가해보고자 하였다. 이를 위해 동물병원 창업자의 배경적 특성과 심리적 특성, 그리고 창업준비과정 특성, 동물병원 서비스요인 특성들이 창업성공 요인, 즉 창업성과에 미치는 영향을 재무적 성과 및 비재무적 성과에 미치는 영향을 분석하였다. 이를 위해 서울 경기 지역 동물병원 150곳에 대하여 설문을 통한 조사연구를 수행하였으며 다음과 같은 주요 결과를 도출하였다. 우선, 창업성과 요인 중 재무적 성과에 대한 연구모형의 분석 결과, 창업자의 배경특성변인 중 학력 요인은 동물병원의 재무적 성과에 부정적인 영향력을 미치며, 창업자의 심리특성 중 통제위치 요인이, 창업준비과정 변인 중에서는 자금조달 요인이 전체적인 재무적 성과에 긍정적인 영향력을 미치는 것으로 나타났다. 또한, 창업성과 요인 중 비재무적 성과에 대한 연구모형의 분석 결과, 창업자의 창업준비과정 변인 중 위험감수성향, 서비스품질 중 무형서비스품질이 비재무적 성과에 긍정적인 영향력을 미치는 것으로 나타났다.

• 대한기계학회:학술대회논문집
• /
• 대한기계학회 2007년도 춘계학술대회B
• /
• pp.3003-3008
• /
• 2007

Critical nozzle has been frequently employed to measure the flow rate of various gases, but hydrogen gas, especially being at high-pressure condition, was not nearly dealt with the critical nozzle due to treatment danger. According to a few experimental data obtained recently, it was reported that the discharge coefficient of hydrogen gas through the critical nozzle exceeds unity in a specific range of Reynolds number. No detailed explanation on such an unreasonable value was made, but it was vaguely inferred as real gas effects. For the purpose of practical use of high-pressure hydrogen gas, systematic research is required to clarify the critical nozzle flow of high-pressure hydrogen gas. In the present study, a computational fluid dynamics(CFD) method has been applied to predict the critical nozzle flow of high-pressure hydrogen gas. Redlich-Kwong equation of state that take account for the forces and volume of molecules of hydrogen gas were incorporated into the axisymmetric, compressible Navier-Stokes equations. A fully implicit finite volume scheme was used to numerically solve the governing equations. The computational results were validated with some experimental data available. The results show that the coefficient of discharge coefficient is mainly influenced by the compressibility factor and the specific heat ratio, which appear more remarkable as the inlet total pressure of hydrogen gas increases.

• Korean Chemical Engineering Research
• /
• 제55권5호
• /
• pp.623-628
• /
• 2017

화력발전소의 연료로 사용되는 우드펠릿을 시료로 하여 시료 용기의 크기에 따른 최소자연발화온도를 구하였으며, 이 온도로부터 Frank-Kamenetskii의 열발화 이론을 이용하여 겉보기 활성화 에너지를 구함으로써 물질의 위험성을 예측하였다. 용기의 크기가 클수록 발화한계온도는 낮아졌으며, 겉보기 활성화 에너지는 37.83 kcal/mol을 구하였다. 또한 시료의 용기가 커질수록 발화유도시간 및 최고온도에 도달하는 시간이 길어졌다.

• 한국정보시스템학회지:정보시스템연구
• /
• 제26권1호
• /
• pp.53-73
• /
• 2017

Frequent outbreak of intrusion of private information is occurring recently not only at portal sites but also in electronic information service of public agencies. Due to these intrusions, it is observed that the citizens tend to avoid providing their private information even to the service for public agencies. Therefore, the object of this research can be explained as demonstrating the influence of the intention of provision for private information to foster the selectronic information ervice of the public agencies. In order to achieve this, this research intends to demonstrate how the experience of the intrusion of the private information affects the concern about the privacy and how the information factor from the public electronic information service has influence on the reliability toward the public. The results showed that the experience of intrusion of privacy, awareness of the danger of privacy, and the sense protection of the information from the manager at public agencies have direct influence on the concern of privacy. Meanwhile, it has been verified that the awareness of information protection of a manager, the systemicity of information protection, and the surveillance and punishment of information protection have influence on the reliability of public agencies.

• 한국안전학회지
• /
• 제29권6호
• /
• pp.34-39
• /
• 2014

This paper is aimed to prevent danger of electrical fire at cattle barn to detect resistive and capacitive leakage current component for wiring type and length. In order to analysis for electric leakage component for cattle barn sizes and normal buildings, this paper was studied field state investigation which are at cattle barn companies(10 companies) in Cheong-won location and normal buildings at Nam-bu market in Jeon-ju location. Market to deduce the problems of electric leakage component is analyzed. The resistive and capacitive leakage current component for wiring type and length is analyzed at Beon-young cattle barn. Results show that electric leakage component suggested in this paper are valuable and usable to electrical fire in leakage current based on environment factor, which will prevent severe damage to human beings and properties and reduce the electrical fires in cattle barn. It is acceptable for electrical equipment use in an cattle barn.

• 해양환경안전학회지
• /
• 제25권6호
• /
• pp.749-756
• /
• 2019

본 연구는 신임해양경찰공무원의 교육훈련에 공공봉사동기가 영향을 미치는가를 검증하였다. 연구결과는 공공봉사동기의 하위변인인 자기희생, 공익몰입, 공공정책의 호감도는 교육만족도에 영향을 미치는 것으로 조사되었으나 공공봉사동기 하위변인인 동정심은 교육내용만족에 대한 영향요인은 기각되었다. 본 연구는 내재적 요인인 공직에 필요한 봉사정신, 희생정신과 같은 무형의 자산이 교육만족도영향요인임을 검증하였다는데 의미가 있다. 해양경찰은 육상경찰이나 다른 공직분야와 달리 해상이라는 장소적인 위험성으로 인하여 공직 가치의 중요성이 보다 중요시되므로 이를 고양하기 위한 다양한 제도와 연구의 필요성이 인정된다.

• International Journal of Advanced Culture Technology
• /
• 제8권3호
• /
• pp.54-60
• /
• 2020

Online cybercrime has various causes. The criminal guilty language, Criminal lingo is active in the shaded area with the bilateral aspect of the word on cyber. It has been continuously producing massive risk factors in cyberspace. Criminals are shared and disseminated online. It has been linked with fake news and aids to suicide that has recently become an issue. Thus the criminal lingo has become a real danger factor on cyber interface. Recently, Criminal lingo is shared and distributed as cyber hazard information. It is transformed that damaging to the youth and ordinary people through the internet and social networks. In order to take action, it is necessary to construct an expert system based on AI to implement a smart management architecture with block-chain technology. In this paper, we study technically a new smart management architecture which uses artificial intelligence based decision algorithm and block-chain tracking technology to prevent the spread of criminal lingo factors in the evolving cyber world. In addition, through the off-line regular patrol program of police units, we proposed the conversion of online regular patrol program for "cyber harem area".

• 한국건축시공학회지
• /
• 제6권1호
• /
• pp.123-130
• /
• 2006

After the new house symptoms recently, room environment pollution problem of building syndrome and so on is becoming research about ways to solve this being risen. Is taking advantage of nature data by building materials by one of this way, but Friendly Environmental performance examination for structure material is insufficient misgovernment being real condition that put emphasis in ability as most embellishment and in finish. Environmental examination is insufficient misgovernment on factor itself as structure material. Also, being real condition that radon that is responsible for lung cancer occurrence next to smoke in building materials such as concrete and so on is happened, the danger is reported much through mass communications and research paper etc. Therefore, this research measured radon release amount and the carbon dioxide adsorption rate for physical special quality measuring and Friendly Environment Efficiency that follow to 'KS F 4004 Concrete bricks' regulation after manufacture Concrete Bricks utilizing charcoal that is nature material by sand. This study finding carbon dioxide density appeared and displayed effect that charcoal Controls radon release that happen in Concrete Bricks to maximum 74% that decrease to best 95% though decreased the charcoal addition rate increases.