• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1665-1667
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• 2007

Recently, retrieval of various video data has become an important issue as more and more multimedia content services are being provided. To effectively deal with video data, a semantic-based retrieval scheme that allows for processing diverse user queries and saving them on the database is required. In this regard, this paper proposes a semantic-based video retrieval system that allows the user to search diverse meanings of video data for electrical safetyrelated educational purposes by means of automatic annotation processing. If the user inputs a keyword to search video data for electrical safety-related educational purposes, the mobile agent of the proposed system extracts the features of the video data that are afterwards learned in a continuous manner, and detailed information on electrical safety education is saved on the database. The proposed system is designed to enhance video data retrieval efficiency for electrical safety-related educational purposes.

• 한국초등과학교육학회지:초등과학교육
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• 제33권3호
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• pp.597-606
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• 2014

The purpose of this study is to survey and analyze difficulties in teaching and learning elementary school science on the chapter titled 'electric circuit'. 28 elementary school teachers who teach 5th grade science and 73 5th grade students in elementary school were taken part in this survey. The pilot questionnaire was distributed to find out both the degree and the reason of difficulties in teaching and learning. The answers are analyzed with four areas to extract elements which make class difficult; Learner factors (L), Instruction factors (I), Curriculum & textbooks factors (C), and Environment factors (E). The results are as follows. (1) It can be seen that both students and teachers feel the highest difficulty in 7th lesson 'the direction of current', while they felt little difficulty in lesson 3 'conductor and nonconductor' and lesson 8 'the safety of electricity'. (2) The most mentioned reason of difficulties in teaching and learning was Learner factors (L). (3) Teachers felt many difficulties in experimental environment. On the other hands, students didn't think experimental failures as serious trouble. (4) Students felt many difficulties in new terms and hazy concepts or expressions. (5) Teachers felt a lot of difficulties in those from Curriculum & textbooks factors.

• 한국재난정보학회 논문집
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• 제7권1호
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• pp.51-63
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• 2011

본 연구에서는 초 중고등학교에서 학교안전사고와 관련된 비극적인 일이 일어나기 전에 미연에 예방하고자 하는데 그 목적 있다. 하지만 현재 실상에서 이루어지는 것은 예방이 아니라 사고 후 대처에 중점을 두고 해결해 나가고 있어 인식의 변화와 학교안전에 대한 실천 프로그램이 시급하다. 따라서 학교안전사고 예방을 위한 기초 프로그램으로 안전사고에 대한 매뉴얼 개발 보다 전문적이고 실질적인 안전교육을 위하여 교사의 학교안전교육 이수의 의무화, 학생들에게 흥미를 줄 수 있는 시청각 교육의 활용, 교사가 기술 및 지식을 습득하기 어려운 화재경보기, 전기 안전점검, 건강이상 유무판단의 검진 등의 전담 민간 기관의 활용 및 안전교육활성화, 자격제도 도입을 통한 전문가 배출을 통하여 학교안전사고를 미연에 방지 할 수 있다.

• 한국안전학회지
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• 제35권2호
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• pp.61-66
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• 2020

As asbestos-containing buildings are getting older, asbestos deconstruction works are increasing. As a result, accident risks such as falls, cuts, electric shocks, and suffocation are increasing. Existing studies are mostly about health management and institutional policy research and there is little research on work risk. So workplace risk assessments that are easily applicable in the field are required to be applied. Sealing is the first process of asbestos deconstruction and is the first step to ensure worker's safety. Job Safety Analysis(JSA) and Checklist were used to identify the risk factors and to calculate the level of the risk. By comparing the two risk assessment tools, it was figured out that the JSA is appropriate for the initial process and change of work procedure while Checklist is appropriate for repetitive work. Because the sealing process is sort and simple, it is unlikely to cause serious injury. But since the risk of falling and cuts are exist, safety education and supervision are necessary to maintain a safe working environment.

• 한국산학기술학회논문지
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• 제22권6호
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• pp.599-609
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• 2021

국내 접지방식은 2021년부터 IEC 60364에서 제시하는 접지방식을 새롭게 채택하고 있다. 이 접지방식은 인체접촉사고 발생 시, 접촉전압과 통과전류에 대한 특성이 다양하게 나타날 수 있어, 인체에 대한 안전성 평가가 구체적으로 요구되고 있다. 또한, 한국전기안전공사나 대한전기협회에서 IEC 60364의 접지방식에 대한 안전기술 교육을 부분적으로 수행하고 있지만, 안전성을 평가할 수 있는 시험장치가 미흡하여, 전기안전관리자에 대한 교육이 어려운 실정이다. 따라서, 본 논문에서는 IEC 60364의 접지방식별 안전성 평가를 수행할 수 있는 시험장치를 모델링하고, 이를 바탕으로 시험장치를 구현한다. 즉, 전력계통 상용해석 프로그램인 PSCAD/EMTDC를 이용하여, 계통 전원부, 접지방식별 시험장치부, 보조장치부로 구성된 안전성 평가 시험장치의 모델링을 제시하고, 계통전원부, TT접지방식 시험장치부, TN-S접지방식 시험장치부, 모니터링부로 구성된 안전성 평가 시험장치를 구현한다. 상기의 모델링과 시험장치를 이용하여, TT접지방식과 TN-S접지방식의 인체 안전성 특성을 분석한 결과, TT접지방식의 경우 고장점 임피던스가 0[Ω], 10[Ω], 100[Ω]에서 인체 통과전류는 각각 104[mA], 87.4[mA], 35.5[mA]가 산정되었고, TN-S접지방식의 경우 54.9[mA], 4.1[mA], 0.4[mA]가 산정됨에 따라, TN-S접지방식이 TT접지방식에 비하여 감전에 대한 보호가 우수함을 알 수 있고, 저압수용가에서 사용 중인 TT 접지방식에서 TN-S 접지방식으로 전환하면 감전에 대한 보호성능을 향상시킬 수 있음을 알 수 있었다.

• 한국안전학회지
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• 제36권2호
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• pp.39-48
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• 2021

This study was conducted to suggest a direction in which safety managers can concentrate on industrial accident prevention and safety management for the organization. The job resources of safety managers were divided into organizational and individual levels, and the magnitude of the impact on organizational commitment was compared. Furthermore, job demands were classified into environmental risk factors and personal psychological factors to confirm their effect on organizational commitment. The moderating effect of job resources and sub-factors of the variable in the relationship between job demands and organizational commitment was verified. In this study, a questionnaire survey was conducted on 193 safety managers in the domestic electric construction business, data were collected, and a questionnaire of 180 people was used for the final analysis. Based on the results, organization-level resources among the sub-factors of job resources and individual psychological factors among the sub-factors of job demand had a more significant influence on organizational commitment. In the relationship between job resources and organizational commitment, the moderating effect of job demand was verified, confirming that job demand had a negative moderating effect. Individual psychological factors had a modulating effect, whereas environmental factors did not. The significance, implications, and limitations of this study are discussed based on the research results.

• 한국재난정보학회 논문집
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• 제4권1호
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• pp.34-52
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• 2008

The result of all terrors causes enormous damage. In order to prevent this damage in advance and find a prompt provision after terror, we investigated a safety measure against terror on the assumption that the fire in Daegu central subway is a subway terror. The followings are the safety measures against terror based on an underground space. Frist, training systems have to be established to provide against a terror. Second, People's consciousness about safety from a terror, centering on early education, has to be raised. Third, the provisions related with underground tunnel have to be established so that people can take shelter in underground tunnel areas. Fourth, CCTV has to be established in the guest rooms of the electric motor cars. Last, cooperative systems among related organizations have to be constructed, and the networks of the organizations have to be established so that they can cope with an accident.

• Journal of Radiation Protection and Research
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• 제32권2호
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• pp.71-78
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• 2007

본 연구에서는 원자력 발전소 주변 일시거주자의 방사선 비상시 소개와 관련된 사회행동 특성-특히 소개와 관련된 행동특성을 분석하는데 목적이 있다. 이를 위해 먼저, 이론적 검토 차원에서 비상사태시 소개의 의미와 유형, 그리고 소개를 시작하는데 소요되는 소개준비시간을 살펴보았다. 그리고 소개 대상 주민에 대한 행동특성을 울진, 월성 및 고리원전 방사선비상계획 구역 내에 체류하는 일시거주자를 대상으로 면접설문조사를 통해 실증 분석하였다. 연구의 주요 결과는 다음과 같다. 첫째, 방사선 비상시의 원활한 소개 및 안전 확보를 위하여 일시 거주자에게 소개 경보에 대한 사전 지식을 효율적으로 제공하기 위한 방안을 마련하는 것이 필요하다. 둘째, 방사선 비상시 일시거주자의 교육 훈련 방안을 마련하는 것이 필요하다. 셋째, 일시거주자가 자발적 소개를 하지 않으려는 이유와 배경을 파악하고, 대응 방안을 마련하는 것이 필요하다.

• 웰빙융합연구
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• 제7권1호
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• pp.27-33
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• 2024

Purpose: This study investigates human error accidents in the Korean railway sector, emphasizing the need for systematic management to prevent such incidents, which can have fatal consequences, especially in driving-related jobs. Research design, data and methodology: This paper analyzed data from the Aviation and Railway Accident Investigation Board and the Korea Transportation Safety Authority, examining 240 human error accidents that occurred over the last five years (2018-2022). The analysis focused on accidents in the driving, facility, electric, and control fields. Results: The findings indicate that the majority of human error accidents stem from negligence in confirmation checks, issues with work methods, and oversight in facility maintenance. In the driving field, errors such as signal check neglect and braking failures are prevalent, while in the facility and electric fields, the main issues are maintenance delays and neglect of safety measures. Conclusions: The paper concludes that human error accidents are complex and multifaceted, often resulting from a high workload on engineers and systemic issues within the railway system. Future research should delve into the causal relationships of these accidents and develop targeted prevention strategies through improved work processes, education, and training.

• Advances in nano research
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• 제16권4호
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• pp.365-374
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• 2024

This study delves into the significant impact of integrating nanomaterials, specifically carbon and graphene nanoparticles, into the polymer matrix of aluminum alloy 356, utilizing the vortex casting technique, with the aim of improving the mechanical properties of table tennis equipment. Athletes and their coaching teams have long been on a quest for high-performance sports gear, recognizing its pivotal role in unlocking the full potential of players. The dedication of engineers to craft designs, select materials with precision, and uphold stringent testing standards reflects the commitment to meeting the demands of the sporting world. Yet, to remain at the forefront, sports engineering must continually align with contemporary technologies, and nanotechnology has emerged as a transformative force in this regard. This study not only underscores the meticulous efforts in material integration but also highlights the remarkable strides made possible by nanotechnology. Aluminum nanocomposites, particularly, showcase a groundbreaking fusion of exceptional strength and reduced weight, marking a notable achievement in sports equipment innovation. The research outcomes are compelling, revealing a substantial enhancement in the mechanical performance of the sports structures under scrutiny. This promising development hints at a potential paradigm shift in the manufacturing of sports equipment, promising a new era of elevated athlete performance and enhanced safety during the rigors of physical education training. This study stands as a testament to the tangible impact of nanotechnology on the ever-evolving landscape of sports equipment.