• 대한건축학회논문집:구조계
• /
• 제34권5호
• /
• pp.35-42
• /
• 2018

In order to seek out methods to reduce safety accidents caused by construction machinery and equipment, this study collects data about safety accidents and draws main risk factors by construction from the data, through SNA. It aimed to suggest safety management points to be used in future construction fields, by analyzing risk index of such factors. The finding can be summarized: First, Backhoe Bucket is the risk factor for crash accidents of average workers in earth works; boring machines-maintenance is the risk factor for fall accidents of construction machinery operators in foundation works; bending machine-reinforcing rod processing is the risk factor for jamming accidents of reinforcing rod engineers in frame works; and mobile crane-hook is the risk factor for crash accidents of average workers in lifting works. Second, works can be arranged in turn, according to the risk index: earth, lifting, frame and foundation works. Risk factors can be also arranged according to the risk index: Backhoe in earth works, pile drivers in foundation works, bending machines in frame works and mobile cranes in lifting works. This study has some limits, in that it only analyzed main machinery/equipment, among various kinds of them, for earth, foundation, frame and temporary works (lifting works) and used data collected over three years. Therefore, it is necessary to conduct an analysis using big data, by collecting additional data about a lot of machinery/equipment in future construction fields.

• 한국건설안전학회 논문집
• /
• 제4권1호
• /
• pp.9-15
• /
• 2021

최근 건축물이 대형화, 복합화되고 다양한 공법들이 시도되고 있다. 이에 건설장비 사용이 지속적으로 증가하고 있는 것은 물론, 그에 따른 안전사고도 지속적으로 증가하고 있다. 고용노동부 산업재해현황 발표자료에 따르면 건설업 사망사고 중 건설장비로 인한 사망사고 비율이 2009년부터 지속적으로 증가해오고 있는 실정이다. 범죄·교통 등 타산업의 안전분야에서는 평가지표 개발 또는 위험 지수 개발의 요구가 있어 정량적인 지수를 개발하는 연구가 지속적으로 연구가 진행되어 왔다. 반면에 건설장비는 재해사례를 분석하여 개선대책을 도출하는 연구는 되고 있으나, 위험 지수와 관련된 연구는 부재한 실정이다. 이에 본 연구에서는 사고사례를 기반으로 현장의 건설장비 위험 수준을 선행적으로 판단할 수 있는 정량적 지수를 개발하고, 현업에 활용 가능성도 확인해 보고자 한다.

• 한국재난정보학회 논문집
• /
• 제18권1호
• /
• pp.29-37
• /
• 2022

연구목적: 본 연구는 교통안전시설의 신뢰성 있는 정보제공과 운영관리를 위한 평가지표를 개발하는데 목적이 있다. 연구방법: 분석 방법은 현재 교통안전시설 운영관리 현황을 파악하여 평가지표를 선정하고 AHP 조사를 통해 각 지표의 중요도를 분석하였다. 연구결과: 종합 중요도 분석 결과, 정보 정확성과 전산체계 구축 수준에 대한 평가지표에서 우선순위가 가장 높은 것으로 나타났다. 반면, 서비스 관리부분에 해당하는 평가지표는 우선순위가 가장 낮은 것으로 분석되었다. 결론: 본 연구의 결과는 효율적인 교통안전시설 운영관리를 위해 각 기관별 관리 수준을 파악할 수 있는 척도가 될 것으로 보이며, 향후 자율주행 상용화를 고려하여 정확한 정보 제공을 위한 기반을 구축할 수 있을 것으로 판단된다.

• Nutrition Research and Practice
• /
• 제11권5호
• /
• pp.402-411
• /
• 2017

BACKGROUND/OBJECTIVES: The role of a school's nutrition environment in explaining students' eating behaviors and weight status has not been examined in an Asian setting. The purpose of this study was to create a school nutrition environment index and to pilot test the index in elementary and middle schools in urban South Korea. SUBJECTS/METHODS: This study used a mixed-methods approach. Environment assessment tools were developed based on formative research, which comprised literature reviews, in-depth interviews, and focus group discussions. Key elements from the formative research were included in the assessment tool, which consisted of a structured survey questionnaire for school dietitians. Fifteen school dietitians from 7 elementary and 8 middle schools in Seoul completed the questionnaire. RESULTS: The formative research revealed four main sections that guided a summary index to assess a school's nutrition environment: resource availability, education and programs, dietitians' perceptions and characteristics, and school lunch menu. Based on the literature reviews and interviews, an index scoring system was developed. The total possible score from the combined four index sections was 40 points. From the 15 schools participating in the pilot survey, the mean school nutrition-environment index was 22.5 (standard deviation ${\pm}3.2$; range 17-28). The majority of the schools did not offer classroom-based nutrition education or nutrition counseling for students and parents. The popular modes of nutrition education were school websites, posters, and newsletters. CONCLUSIONS: This paper illustrates the process used to develop an instrument to assess a school's nutrition environment. Moreover, it presents the steps used to develop a scoring system for creation of a school nutrition environment index. As pilot testing indicated the total index score has some variation across schools, we suggest applying this instrument in future studies involving a larger number of schools. Future studies with larger samples will allow investigation of the validity and reliability of this newly developed tool.

• 한국전산구조공학회:학술대회논문집
• /
• 한국전산구조공학회 1994년도 봄 학술발표회 논문집
• /
• pp.199-208
• /
• 1994

One of the main objectives of the study is to propose a practical but realistic limit state model considering combined effect of axial and bending load for reliability analysis and safety assessment of cable-stayed bridge under vehicle traffic loads. This paper is intended to propose a new approach for the evaluation of reserved load carrying capacity of cable-stayed bridge under vehicle traffic loads in terms of equivalent strength, which may be defined as a bridge strength corresponding to the reliability index of the bridge. This can be derived from an inverse process based on the concept of FOSM form of reliability index. AFOSM and IST methods are used for the reliability analysis of the proposed models. The proposed reliability model and methods are applied to the safety assessment of Jindo Bridge which is one of major two cable-stayed bridges in Korea.

• 한국식품위생안전성학회지
• /
• 제19권2호
• /
• pp.55-59
• /
• 2004

This study was performed to investigate 172 samples of fried food in fast food store. The free fatty acid value of 22 samples exceeded standard of fried-food. These samples were 10 fried chickens, 6 fried potatoes and 5 fried onions. Fatty acid composition differed from each company. The correlation between free fatty acid value and double bond index was very low. New standard of fried food in fast food store is needed for thorough hygiene management, because of being not existed standard. The fried potato containing many carbohydrate and fat appeared higher calory than fried chicken containing many protein. The fried food had high fat comparatively, so that attention in regard to excess intake is demanded. The trace materials were included Mg, Ca, Mn, Fe, Zn, Cu and Cr in order of quantity, and the harmful heavy metals-Pb, Hg and Cd- were included small quantity.

• 대한안전경영과학회지
• /
• 제13권1호
• /
• pp.203-209
• /
• 2011

This study develops three new models that are practically applicable to three stages of Taguchi's robust design, which includes system design, parameter design and tolerance design. In system design, the Multiple Loss Function Analysis(MLFA) and Overall Loss Index(OLI) which reflect upon weight of characteristics and importance of specification are developed. Moreover parameter design presents Process Capability Index(PCI), $C_{PUK}$ and $C_{PLK}$, in order to segregate Signal-To-Noise Ratio(SNR) into accuracy and precision for an evaluation of relative comparison. In addition, tolerance design presents the new model of allowance computation for assembled product which is primarily derived from safety margin(SM) considering functional limit and specification. The guideline of those three new models, which include systematic charts and applicable illustrations, offers convenience for practitioners in the field. Hence, the practical applications could be made with the steps of robust designs such as system design, parameter design and specification allowance design.

• 해양환경안전학회:학술대회논문집
• /
• 해양환경안전학회 2018년도 공동국제학술발표회
• /
• pp.44-44
• /
• 2018

• 한국철도학회논문집
• /
• 제12권6호
• /
• pp.1037-1042
• /
• 2009

국내 사면안정성 설계기준은 우기 건기시로 제안되어 사용되고 있지만, 한계평형해석의 결과로 산출되는 안전율이 외부조건에 의해 변화되며, 특정한 변곡점이 없기 때문에 사전에 안전을 확보하기 어렵다는 점에 착안하여 경보발령, 서행 및 열차정지 등과 같은 안전규정의 설정이 가능한 대안을 검토하였다. 이를 위하여 본 연구에서는 불포화토질역학과 신뢰성해석에 기초하여 현행 안전율을 보조할 수 있는 부가적인 지표를 도입하였다. 강우침투에 따라 안전율과 신뢰지수는 지수함수형태로 감소하는 특징을 보이며, 파괴확률은 누적확률분포함수 형태로 증가함을 확인할 수 있었다. 본 연구에서 검토한 부가지표인 파괴확률 변화속도는 현재의 기준 안전율 부근에서 명백한 변곡점을 갖는 특징이 있다. 이를 이용하면 사면의 안전관리와 모니터링 시스템에 대한 적정 규정으로 적용이 가능할 것으로 판단된다.

• 한국항해항만학회지
• /
• 제42권5호
• /
• pp.311-316
• /
• 2018

IMO introduced the concept of e-Navigation and proposed MSPs(Maritime Service Portfolios) concept to reduce marine accidents, to improve efficiency of ship operation, port operation, and ship operation technology. Korean e-Navigation defines S1 ~ S5 services, as the service concept focused on domestic e-Navigation service corresponding to IMO MSPs, and is constructing a system as an ongoing project. S2 service (onboard system remote monitoring service) among the concepts of Korean e-Navigation services, is a service concept that judges the emergency level according to risk if an abnormal condition occurs during navigation, and provides corresponding guidance to accident ships based on emergency level. The purpose of this paper is to provide a basic architecture proposal of Korean e-Navigation S2 service navigation safety module, based on the S2 service operation concept. To do this, we conducted a questionnaire survey to ask experts with experience with sailors, to respond to the subjective risk experienced by sailors considering effects of anomalies, including equipment failure relative to sailing and navigational safety. Risk level for each abnormal condition was classified. The basic algorithm design of the navigation safety module is composed of safety index (SI) calculation module based on results of questionnaire and expert opinions, safety level (SL) determination module according to safety index, and corresponding guidance generation module according to safety level. To conduct basic validation of basic architecture of the navigation safety module, simulation of the ship anomaly monitoring was performed, and results have been revealed.