• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회 3차
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• pp.3-10
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• 2010

Case study was carried out on the interpretation of the mechanical behavior of a severely damaged reinforced earth wall comprising geotextile with the concrete panel facing. In this part I, the outline of the damaged reinforced earth wall is in detail described. The background and cause of the damage are discussed based on the results of site investigation. The engineering properties of the fill were examined by performing various in-situ and laboratory tests, including the surface wave survey (SWS), PS-logging, RI-logging, soaking test, the direct shear box (DSB) test, bender element (BE) test, etc. The background as well as the cause for the damage of the wall may be described such that i) a considerable amount of settlement took place over a 3m thick weak soil layer in the lower part of the reinforced earth due to seepage of rainfall water, ii) the weight of the upper fill was partially supported by the geo-textile hooked on the concrete panels (n.b., named conveniently "hammock state" in this paper), and iii) the concrete panels to form the hammock were severely damaged by the unexpectedly large downwards compression force triggered by the tension force of the geotextile. The numerical simulation for the hammock state of the wall, together with counter-measures to re- stabilize the wall is subsequently described in Part II.

• 디지털융복합연구
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• 제12권6호
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• pp.35-42
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• 2014

우리나라에서 해상에서 발생하는 살인, 강도, 마약밀매, 불법조업 등 해양범죄에 관한 일반적 수사관할권은 해양경찰에게 있다. 해양범죄는 육지에서 발생하는 일반범죄에 비해 희소성, 피해의 대형화, 증거물의 오염가능성을 띄고 있기 때문에 이러한 범죄를 다루는 수사관들이 평소 담당사건에 대한 고도의 전문성을 보유하고 있어야 한다. 그런데 현재 해양경찰은 범죄수사전문가가 부족하고, 경찰수사연수원 등 일반경찰의 교육기관에 수사교육을 위탁하는 등 자체적인 수사교육 역량이 부족한 실정이다. 이에 해양범죄에 관한 정보와 자료를 축적하고 수사전문가를 양성한 후, 해양범죄에 관한 전문교육기관을 설치하여 해양범죄 특유의 교육과정을 통해 해양범죄 수사역량을 강화할 것을 제안한다.

• 한국가스학회지
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• 제14권4호
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• pp.6-11
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• 2010

연구실험실 사고 방지를 위하여 2005년 연구실 안전환경조성에 관한 법률이 법제화되어 국내 대학 또는 국공립출연연구소나 기업부설 연구소 실험실에서는 안전관리시스템을 구축하고, 안전점검과 정밀안전진단을 실시하고 있음에도 불구하고 폭발, 화재 등 각종 대형 사고가 지속적으로 발생하여 연구 활동 종사자의 인명 피해와 재산 손실이 상당한 수준에 이르고 있다. 또한 연구실험실에서 발생하는 사고는 유사한 내용으로 반복적으로 발생되고 있으므로 이러한 사고의 원인분석과 재발 방지를 위한 안전관리 대책이 시급하다. 따라서 본 논문에서는 국내 해외 대학 또는 국공립출연 연구소나 기업 부설 연구소 실험실에서 발생한 사건 사고에 대해 Root Cause Analysis 기법을 이용하여 사고원인 조사 결과를 보여주고, 이에 따른 실험실 사고원인 조사 분류 Map과 개선사항을 제시하여 연구실험실의 안전관리를 향상시키고자 한다.

• Safety and Health at Work
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• 제13권1호
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• pp.117-125
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• 2022

Background: External-cause mortality is an important public health issue worldwide. Considering its significance to workers' health and inequalities across industries, we aimed to describe the state of external-cause mortality and investigate its difference by industry in Republic of Korea based on data for 2018. Methods: Data obtained from the Statistics Korea and Korean Employment Information System were used. External causes of death were divided into three categories (suicide, transport accident, and others), and death occurred during employment period or within 90 days after unemployment was regarded as workers' death. We calculated age- and sex-standardized mortalities per 100,000, standardized mortality ratios (SMRs) compared to the general population and total workers, and mortality rate ratios (RRs) across industries using information and communication as a reference. Correlation analyses between income, education, and mortality were conducted. Results: Age- and sex-standardized external-cause mortality per 100,000 in all workers was 29.4 (suicide: 16.2, transport accident: 6.6, others: 6.6). Compared to the general population, all external-cause and suicide SMRs were significantly lower; however, there was no significant difference in transport accidents. When compared to total workers, wholesale, transportation, and business facilities management showed higher SMR for suicide, and agriculture, forestry, and fishing, mining and quarrying, construction, transportation and storage, and public administration and defense showed higher SMR for transport accidents. A moderate to strong negative correlation was observed between education level and mortality (both age- and sex-standardized mortality rates and SMR compared to the general population). Conclusion: Inequalities in external-cause mortalities from suicide, transport accidents, and other causes were found. For reducing the differences, improved policies are needed for industries with higher mortalities.

• 한국과학교육학회지
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• 제21권1호
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• pp.1-12
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• 2001

확장적 과학 탐구는 실제의 과학 활동에 보다 가까운 포괄적인 과학 탐구의 기회를 제공한다는 점에서 학교 과학교육에서 추구되어야 하며 이러한 탐구 활동을 통한 교육적 성취 중 중요한 하나가 탐구 동기라고 할 수 있다. 본 연구에서는 확장적 과학 탐구 과제의 특징인 실제성, 개방성, 연속성이 중학생의 탐구 동기에 어떠한 영향을 미치는지 구체적인 사례 분석을 통하여 탐색하였다. 탐구 동기를 조사하기 위한 설문 결과와 학생들의 과학 학습 성취 수준을 고려하여 면담 대상 학생 10명을 추출하였으며 개별 면담 결과를 기록하여 탐구 동기의 변화 사례 및 원인을 분석하였다. 확장적 탐구에 대해 정적 탐구 동기를 나타낸 학생들은 교과서 탐구가 이론의 확인에 그친다는 점에서 비판적이었으며 확장적 탐구 과제의 실제성과 개방성을 정적 탐구 동기의 주요 원인으로 인식하였다. 또 확장적 탐구에 대해 부적 탐구 동기를 보인 학생들은 교과서 중심의 학습을 강하게 선호하였으며 확장적 탐구 과제의 개방성을 부적 탐구 동기의 주요 원인으로 인식하였다. 연속성에 대해서는 대체적으로 긍정적인 반응보다는 부정적인 반응이 다소 많았으나 탐구 동기의 주요 원인으로 인식되지는 않았다.

• 대한인간공학회지
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• 제35권3호
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• pp.165-173
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• 2016

Objective: The objective of this research is to inquire about safety information from the standpoint of its usefulness to suggest the significance of the Reactive Safety Action Program, which serves to promote aviation safety culture. Background: Safety information plays an important role in operating safety programs. Each organization learns lessons from safety information collected from aviation accidents and incidents. When an accident occurs, it is only through safety investigation and a close inquiry on the cause that we can come up with an appropriate countermeasure which would contribute to preventing the recurrence of the same or similar accident. However, the usefulness of safety information produced from unsatisfactory safety investigation is insufficient. Method: This research analyzed the characteristics of aviation accidents, the differences between safety investigations and legal accident investigations in systematic and operative perspectives, and safety culture as a measure to activate reporting systems (compulsory/voluntary). Results: This research defined the investigation scope and processes of safety investigations and legal accident investigations. It also suggested factors such as just culture based on trust, non-punitiveness, confidentiality, the participation of the entire staff through the use of inclusive reporting base, ensuring the independence of the operating organization as a way to promote safety through reporting systems. Conclusion: The organization's effort is the important aspect in obtaining exact and accurate safety information from accidents/incidents. The separate running of SIB (Safety Investigation Board) and AIB (Accident Investigation Board), the systematization of safety information reporting system, and prescribing (legislating) the composition of related organizations are some representative programs. Application: This research inquired experiences that contributed in promoting aviation safety culture in a reactive perspective, and will serve a role in spreading safety culture by enabling the use of application experiences of the aviation field in other domains.

• 한국재난정보학회 논문집
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• 제13권1호
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• pp.1-5
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• 2017

지난 3년('13~'15)간 화학물질사고는 301건이 발생하였으며, 연평균 약 100건이 집계됐다. 이와 같은 화학사고는 인명과 환경에 많은 피해를 가져왔다. '13년~'15년에 발생한 운반차량 화학사고는 연평균 21건으로 전체 화학사고의 약 21%를 차지한다. 화학물질 운반차량의 사고는 지역에 관계없이 도로상에서 발생하고 있기 때문에, 관계기관의 대응 및 사후처리 등 체계적인 현장조사가 필요하다. 또한 화학물질 운반업자 및 화물주 등의 협조가 절대적으로 필요한 상황이다. 따라서, 본 논문에서는 화학물질 운반차량의 사고발생에 대한 현장조사 및 처리 절차를 조사 분석하였다. 이를 통해 운반차량의 화학사고에 대한 원인을 분석하고 현장조사와 처리절차를 체계적으로 마련하는 기초자료가 될 것으로 판단된다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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• pp.475-479
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• 2001

Compensation characteristics or active filters based on voltage detection are investigated. These active filters act equivalently as a passive circuit so that they may not cause practical problems such as stimulation of resonance in the distribution lines. Thus, these active filters can be used as the general-purpose active filters. On the other hand, these active filters may have a possibility of the anti-resonance associated with the line inductance of the distribution lines. In this paper, the relationship between the anti-resonance and the control parameters of the proposed active filters is clarified. Some methods to avoid the problems due to the anti-resonance are investigated. Experimental results are included to confirm the validity of the investigation presented in this paper.

• 소음진동
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• 제9권4호
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• pp.835-840
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• 1999

Cause of excessive vibration signals with twice the rotational speed of a 2-pole generator rotor in balancing for fossil power plants was investigated. The 2-pole generator rotor is treated as a typically asymmetric rotor in vibration analysis, and produces asynchronous vibration with twice the rotational speed for its own inertia and stiffness asymmetry. This paper introduces practical balancing procedure and experimental vibration data of the asymmetric 2-pole rotor in balancing, and presents the results of investigation into sources of the excessive vibration signals.

• 조명전기설비학회논문지
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• 제25권12호
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• pp.113-118
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• 2011

In this study, investigation and appraisal method for the scene of a fire according to electrical fire hazards of hair dryer which is usually used at living space are presented. Hair dryer is briefly composed of heating part, wind part and control part. Electrical fire hazards of hair dryer are insulation destruction of power cord, ignition by overheat of heating coil, scattering spark on inside dust, overheat of motor by fan shackle, ignition by carelessness of user, and so on. Fire cause by hair dryer can be perceived through investigation about half-disconnection of power cord, contact badness of power plug, verification of heating coil, fan and switch. These results are expected to be utilized effectively in a countermeasure to prevent an electrical fire by hair dryer.