• 해양환경안전학회:학술대회논문집
• /
• 해양환경안전학회 2004년도 춘계학술발표회
• /
• pp.7-11
• /
• 2004

Maritime safety and marine environmental protection are the most important topic in marine society. But, so many marine accidents rave been occurred with the development of marine transportation industry. On the other side, ship is being operated under a highly dynamic environment and many factors are related with ship's collision Nowadays, the increasing tendency to the human errors of ship's collision is remarkable, and the investigation of the human errors has been heavily concentrated. This study analysed on the human errors of ship's collision related to the negligence of lookout and classified basic error type using GEMS(Generic Error Modeling System) dynamic model.

• 대한가정학회지
• /
• 제36권4호
• /
• pp.121-136
• /
• 1998

The purpose of this study was to investigate the causal resationships between children's learned helplessness, self-evaluation and the home environment which included the family's socio-economic status, parent's achieving pressure and maternal child rearing behavior. The results were as follows; The socio-economic status of home influenced on the parent's achieving pressure, maternal child rearing behavior and children's self-evaluation, but didn't influence children's learned helplessness. Parent's achieving pressure had a negative correlation with the maternal child rearing behavior and influenced children's learned helplessness, but did not influence children's self-evaluation. Maternal child rearing behavior influenced children's self-evaluation, but did not influence children's self-evaluation. Maternal child rearing behavior influenced children's self-evaluation, but did not influence children's learned helplessness directly. Children's self-evaluation had the strongest direct impact on children's learned helplessness. This was found to be a mediating factor between home environmental factor and children's learned helplessness.

• 설비공학논문집
• /
• 제17권9호
• /
• pp.855-862
• /
• 2005

An experimental investigation has been carried out for aluminum foam heat sink inserted into the annulus to examine the feasibility as a heat sink for high performance forced water cooling in the annulus. The local wall temperature distribution, inlet and outlet pressures and temperatures, and heat transfer coefficients were measured for heat flux of 13.6, 18.9, 25.1, 31.4 $kw/m^2$ and Reynolds number ranged from 120 to 2000. Experimental results show that the friction factor is higher than clear annulus without aluminum foam, while the significant augmentation in Nu is obtained. This technique can be used for the compactness of the heat exchanger.

• 한국안전학회지
• /
• 제27권6호
• /
• pp.54-58
• /
• 2012

This paper is purposed to analyze electric leakage component which can prevent electrical fires on breaker capacity expansion and power failure by operation of ELB(Earth leakage breaker) for stable sizes. In order to analysis for electric leakage component for stable sizes, this paper studied field state investigation which are at stable companies( 10 companies) in cheong-won location to deduce the problems of electric leakage component is analyzed. The field state experiment method is measured with electric leakage component which load part of ELB detected by electric loads(electrical fan, lighting, auto waterer, feeder and halogen lighting) and stable sizes. 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 stable.

• 한국과학교육학회지
• /
• 제24권6호
• /
• pp.1131-1142
• /
• 2004

과학자들의 진로선택과정에서 드러난 부각요인을 분석한 결과 개인적 특성에서 면담자의 83%는 자신의 적성이나 능력을 파악하는 능력이 부각되었다. 이러한 과학자들은 진로선택과정에서 자신의 흥미와 관심을 중요시하였으며 동시에 왜 흥미를 느끼는지에 대한 이유를 명확히 진술하였다. 학교 성적은 87%의 과학자가 초 중 고등학교 전체 성적이 상위 10%이내에 들었다. 가정환경에서는 부모의 영향이 가장 부각되었는데, 특히 진로에 대해 조언을 한 아버지의 영향이 지배적이었다. 학교환경에서 가장 부각된 요인은 교사였다. 특히 과학교사의 수업과 대학 교수의 영향이 중요하게 언급되었다. 고등학교 3학년에 진로를 결정한 경우는 고등학교 과학 교사의 영향이, 대학교 1학년 이후에 진로를 결정한 경우는 대학교 교수의 영향이 부각되었다. 사회문화적 환경에서는 미래 직업 기회와 관련된 사회적인 전망이 가장 중요하게 부각되었다. 연령이 젊을수록 자신의 적성과 능력을 파악하는 능력과 사회적인 전망을 중요시하는 것으로 드러났으며, 물리학자들은 자신의 적성과 능력을 파악하는 능력이, 화학자들은 자신의 적성과 능력을 파악하는 능력과 사회적인 전망이, 생물학자들은 사회문화적 환경의 다양한 요인들이, 공학자는 아버지의 조언과 사회적인 전망이 부각되었다. 그리고 과학자들의 진로선택과정을 분석해 본 결과 대부분 제도적으로 진로를 결정해야하는 고등학교 3학년과 대학교 1학년말에 진로를 결정하였다. 결론적으로 과학자들은 현재의 진로를 선택하면서 자신의 내부적 요인과 외부적 요인을 모두 고려하였다. 내부적 요인으로 자신의 적성과 능력을 중요하게 고려하도록 한 것에는 중고등학교 과학 교사와 대학교수의 역할이 관련되었으며, 외부적 요인인 사회적인 전망은 아버지가 진로에 대해 조언한 것과 관련되었다. 따라서 이러한 연구 결과는 우수한 과학인력을 양성하기 위해서 자신의 적성과 능력을 파악할 기회, 과학자와 과학적 연구 활동에 대한 부모의 긍정적인 인식과 전망의 제시, 우수한 능력을 지닌 교사와 교수의 확보, 과학에 대한 긍정적인 인식 등이 이뤄질 수 있는 과학교육적 환경이 필요함을 시사한다.

• 디지털융복합연구
• /
• 제11권8호
• /
• pp.143-157
• /
• 2013

본 논문은 창업과 관련하여 선행연구가 많이 이루어져 왔던 개인특성 접근법 보다는 환경론적 접근법에 의한 이론적 기반을 토대로 하여 창업의지에 미치는 영향을 규명하고자 하였다. 특히 한국인들에게 높게 나타나고 있는 사업실패부담감이 창업환경과 창업의지 간 부정적 영향을 미치는 매개변수 역할을 할 것인가에 대한 가설을 검증하였다. 이를 위해 잠재창업자인 대학생 및 일반인들을 대상으로 설문조사를 실시하였으며 총 335명의 응답을 표본을 대상으로 검증하였다. 연구결과에 의하면, 첫째로, 객관적 창업환경과 잠재 창업가의 자신감 혹은 자기효능감(self-efficacy)으로 정의되는 주관적 환경인식이 창업의지에 유의한 영향력을 미치는 것으로 나타났다. 둘째, 객관적 창업환경 및 주관적 환경인식과 창업의지 간의 관계에서 사업실패부담감이 매개변수 역할을 할 것이라는 가설에서 유의한 결과를 얻었다. 셋째로, 본 논문에서 객관적 창업환경의 설명변수로 채택한 보육제도 여건도 향후 창업의지 결정에 중요한 요인이 될 수 있다는 점이다.

• 한국지하수토양환경학회지:지하수토양환경
• /
• 제20권7호
• /
• pp.1-12
• /
• 2015

The purpose of this study is to highlight the National Classification System related to cleanup the soil contaminated sites and to provide some guidance to address the priority management rank system before the remediation for Busan metropolitan city. Based on the previous soil investigation data, the quantitative classification of vulnerable areas for soil pollution was performed to successfully manage the contaminated sites in Busan. Ten evaluation factors indicating the high soil pollution possibility were used for the priority management ranking system and 10 point was assigned for each factor which was evenly divided by 10 class intervals. For 16 Gu/Guns in Busan, the score of each evaluation factor was assigned according to the ratio of the area (or the number) between in each Gu (or Gun) and in Busan. Ten scores for each Gu (or Gun) was summed up to prioritize the vulnerable Gu or Guns for soil pollution in Busan. Results will be available to determine the most urgent area to cleanup in each Gu (or Gun) and also to assist the municipal government to design a successful and cost-effective site management strategy in Busan.

• Journal of Korean Society for Atmospheric Environment
• /
• 제10권E호
• /
• pp.343-356
• /
• 1994

In this study, a statistical investigation was carried out for the evaluation of any relationship between polycyclic aromatic hydrocarbons (PAHss) associated with ambient aerosols and other air quality parameters under varying meteorological conditions. Daily measurements for PAHs and air quality/meteorological parameters were selected from a data-base constructed by a comprehensive air monitoring in London during 1985-1987. Correlation coefficients were calculated to examine any significant relationship between the PAHs and other individual variables. Statistical analysis was further Performed for the air quality/meteorological data set using a principal component analysis to derive important factors inherent in the interactions among the variables. A total of six components were identified, representing vehicle emission, photochemical activity/volatilization, space heating, atmospheric humidity, atmospheric stability, and wet deposition. It was found from a stepwise multiple regression analysis that the vehicle emission component is overall the most important factor contributing to the variability of PAHs concentrations at the monitoring site. The photochemical activity/volatilzation component appeared to be also an important factor particularly for the lower molecular weight PAHs. In general, the space heating component was found to be next important factor, while the contributions of other three components to the variance of each PAHs did not appear to be as much important as the first three components in most cases. However, a consistency for these components in their negative correlations with PAHs data was found, indicating their roles in the depletion of PAHs concentrations in the urban atmosphere.

• Journal of Information Processing Systems
• /
• 제16권4호
• /
• pp.760-773
• /
• 2020

When a crime occurs, the information necessary for solving the case, and various pieces of the evidence needed to prove the crime are collected from the crime scene. The tangible residues collected through scientific methods at the crime scene become evidence at trial and a clue to prove the facts directly against the offense of the suspect. Therefore, the scientific investigation and forensic handling for securing objective forensic in crime investigation is increasingly important. Today, digital systems, such as smartphones, CCTVs, black boxes, etc. are increasingly used as criminal information investigation clues, and digital forensic is becoming a decisive factor in investigation and trial. However, the systems have the risk that digital forensic may be damaged or manipulated by malicious insiders in the existing centralized management systems based on client/server structure. In this paper, we design and implement a blockchain based digital forensic management model using Hyperledger Fabric and Docker to guarantee the reliability and integrity of digital forensic. The proposed digital evidence management model allows only authorized participants in a distributed environment without a central management agency access the network to share and manage potential crime data. Therefore, it could be relatively safe from malicious internal attackers compared to the existing client/server model.

• 한국농촌건축학회논문집
• /
• 제16권1호
• /
• pp.17-26
• /
• 2014

This study examined the trend of floor space characteristics, size characteristics and modeling characteristics so as to evaluate the satisfactory level of subjects living in Hanok. By doing so, the type of Hanok was classified into 5 groups. The satisfactory level was evaluated after the subjects resided in Hanok based on each type of housing. In the satisfactory level investigation, which was conducted after the residence, the overall satisfactory level on Hanok showed to be high. In the evaluation on the residence scale, positive results were generally achieved regarding 'full size of residence', 'number of rooms compared to residence size', 'size of living room', etc. The indoor environment of residence evaluation mainly showed positive results regarding 'ventilation', but most subjects were unsatisfied in regard to 'heating', 'noise', 'lighting', etc. In the behavioral factor evaluation of residents, positive results were gained regarding 'health', but comparatively negative results showed based on items of 'construction expense', 'burden of maintenance expense', 'investment value', etc. After analyzing the influential factors on the overall satisfactory level, results showed that 'dust inflow' of the physical site environment evaluation, 'size of living room' of the residence size evaluation, 'heating' of the residence indoor environment evaluation, and 'burden of maintenance expense' in the behavioral factor evaluation significantly influences the overall satisfactory level.