• 한국시뮬레이션학회논문지
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• 제27권1호
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• pp.51-60
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• 2018

본 연구는 혁신확산이론과 관련 선행연구를 기반으로 사용자의 핀테크 결제 서비스 사용 영향요인을 서비스와 사용자 측면으로 분류하여 파악하고 인과관계를 실증 검증하였다. 사용자 수용에 영향을 미치는 서비스 특성으로 복잡성, 혜택, 서비스 제공자 신뢰와 인지된 위험을 서비스 특성으로, 개인 혁신성과 보안사고 경험을 사용자 특성으로 분류하여 연구모형을 구성하였다. 이항 로지스틱 회귀분석 결과 인지된 위험과 사용의 복잡성, 보안사고 경험은 사용자의 핀테크 수용에 부정적인 영향을 미치며 개인혁신성은 긍정적인 영향을 미치는 것으로 나타났다. 추가로 인지된 위험이 핀테크 서비스 수용에 미치는 부정적인 영향을 강화하는 보안사고 경험의 조절효과 역시 유의미하게 나타났다.

• Nuclear Engineering and Technology
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• 제56권2호
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• pp.536-545
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• 2024

Radioactive iodine is a representative fission product to be quantified for the safety assessment of nuclear facilities. In integral severe accident analysis codes, the iodine behavior is usually described by a multi-physical model of iodine chemistry in aqueous phase under radiation field and mass transfer through gas-liquid interface. The focus of studies on iodine source term evaluations using the combination approach is usually put on the chemical aspect, but each contribution to the iodine amount released to the environment has not been decomposed so far. In this study, we attempted the decomposition by revising the two-film theory of molecular-iodine mass transfer. The model involves an effective overall mass transfer coefficient to consider the iodine chemistry. The decomposition was performed by regarding the coefficient as a product of two functions of pH and the overall mass transfer coefficient for molecular iodine. The procedure was applied to the EPICUR experiment and suppression chamber in BWR.

• 한국콘텐츠학회논문지
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• 제12권10호
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• pp.138-147
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• 2012

현대에 이르러 공간디자인 분야에 나타난 의미 있는 시도는 공간구축과 담론의 교차점을 찾으려 시도한 것으로 평가된다. 본 연구는 현대 철학자인 질 들뢰즈가 프란시스 베이컨의 회화를 분석하여 자신의 담론을 전개한 문헌에서 공간적 단서를 찾아 현대 공간디자인과의 공통적 특성을 밝히는 것이다. 들뢰즈의 분석에 따르면 베이컨의 회화는 골격-배경(아플라), 형상-형태(형상) 그리고 윤곽-한계(트랙)라는 세 가지요소로 구분된다. 이러한 회화의 세 요소로부터 '형상-사건의 발생', '트랙-감각의 장소', '아플라-배경과의 상호작용'이라는 공간적 분석어를 추출했다. 그리고 이 분석어로 렘 콜하스의 최근 작품을 분석했다. 렘콜하스의 작품에서 확인되는 들뢰즈 공간론은 사용자와 공간 사이에 발생하는 사건 중심, 사건 발생을 유도하는 장소, 사용자와 공간 또는 공간과 대지 사이의 차이생성이란 방식의 적용이다. 결과적으로 현대 담론과 공간디자인 모두는 생명 운동에 의한 '차이'로서 이해된다는 공통의 특성을 확인할 수 있었다.

• 한국심리학회지 : 문화 및 사회문제
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• 제9권spc호
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• pp.57-73
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• 2003

본 논문은 운전자의 지각과 판단과정에 필요한 최소한의 시간적 여유마저 앗아가 버릴 수 있는 과속운전의 행동배경과 형성과정을 분석하여 과속행동의 사고 위험성을 확인해 보려고 한다. 과속운전의 주요 요인이 될 수 있다고 생각되는 서두름 행동의 구조와 의미를 고찰하여 과속행동과의 관련성을 탐색해 보고, 그리고 위험항상성이론(Risk homeostasis theory)을 중심으로 과속운전의 형성과정에 영향을 미치는 요인을 생각해 보았다. 운전행동은 이익이 발생하는 방향으로 이루어진다고 가정하고, 과속운전으로 얻을 수 있는 이익이 사회적으로 인정받게 되면 과속운전은 습관화될 있다. 운전자는 과속운전이 교통사고의 중요원인이라고 인식하지만, 습관화된 고속운전은 쉽게 변화되지 않음을 운전자 태도조사 결과가 보여주고 있다. 그리고, 서두름행동이 과속운전의 형성과 습관화에 미치는 영향을 규명하는 것이 과속운전행동 이해의 단서가 될 수 있다고 생각한다.

• 제어로봇시스템학회논문지
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• 제22권9호
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• pp.699-704
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• 2016

In this paper, we propose a development method for a drowsiness detection system using retinex theory and edge information for vehicle safety. Detection of a drowsy state of a driver is very important because the drowsiness of driver is often the main cause of many car accidents. After acquiring an image of the entire face, we executed the pre-process step using the retinex theory. We then applied a technique for the detection of the white pixels using edge information. Experimental results showed that the proposed method improved the accuracy of detecting drowsiness to nearly 98%, and can be used to prevent a car accident caused by the driver's drowsiness.

• 대한인간공학회지
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• 제17권2호
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• pp.33-48
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• 1998

This paper illustrates the application of Fuzzy Theory and Analytic Hierarchy Process(AHP) for developing Occupational Stress Index(OSI). The purpose of the OSI development is for future prediction and problem solving of prevailing occupational stress. In developing OSI, the concept of fuzzy set theory was introduced to determine the existence and level of perceived occupational stress instead of actually measuring the strain parameters. The AHP is adopted to collect different weighting factors, since there exist various perceptions and responses to the occupational stress by different individuals. The validation study revealed that the OSI is a reliable predictor of work-related accident and illness and the physiological health of employees. Creating preventive measures, such as early detection of stress, proper placement and promotion of employees, and job enlargement will be possible by using this OSI effectively.

• 한국건축시공학회지
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• 제23권4호
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• pp.417-428
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• 2023

사고 원인에 대한 철저한 분석은 사고 재발 방지를 위한 필수적인 과정이다. 해체공사 사고의 원인을 살펴보면 작업자의 불안전한 행동, 불안전한 상태, 심리적·신체적 상태, 현장관리 원인 등 매우 다양하다. 현재 해체공사 사고통계는 지속적으로 조사·보고되고 있으나 사고 유형에 따른 보다 근본적인 원인 분류 정보가 필요하다. 본 연구에서는 하인리히의 도미노 이론을 바탕으로 해체공사 사고의 유형에 따라 사고원인(불안전한 행동, 불안전한 조건)과 휴먼에러(인적요인)를 분류하였다. 본 연구에서는 해체공사시 사고유형에 따라 사고원인을 체계적으로 분류하기 위해 QFD-FMEA(Quality Function Deployment - Failure Mode Effect Analysis) 3단계 모델을 사용하였다. 사고원인 분류 결과는 사고예방을 위한 안전지식 및 체크리스트로 활용할 수 있다.

• 대한안전경영과학회지
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• 제22권1호
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• pp.45-50
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• 2020

The number of elevators in Korea has surpassed 700,000 units in 2019, which is the 8th in the world by number of installed units and 3rd in the world by new units. The word 'lift' is a representative word, and the category includes elevators, escalators, dumb waiters, and moving walks. Those who live in the city will experience using elevators once or twice a day, and these elevators are becoming an indispensable means of transportation when using high-rise apartments or subways. However, such a convenient elevator also has a lot of risks that threaten the safety of the user and actually cause many accidents every year. In particular, escalators (including moving walks), which account for as little as 5% of all elevators, account for 70% of all elevator accidents. According to Heinrich's chain of thought theory, accidents are caused by a combination of factors, which are divided into five stages: Stage 1: Genetic Factors and Social Environment, Stage 2: Individual Defects, Stage 3: Unsafe behavior and Unsafe conditions, Stage 4: Accident, Stage 5: Injury. Heinrich said that three of these five phases, unsafe behavior and unsafe conditions, require safety management and efforts to prevent accidents. In escalator accidents, the analysis of accident cases that have occurred so far will be related to unsafe behaviors and unsafe conditions, and the effective management of these causes of accidents will enable safer and more convenient use of escalators. This study analyzed accident cases of elevator users, focusing on escalator accidents over the last 10 years (2010 ~ 2019), and safety management to prevent safety accidents of elevator users by analyzing the behavior of actual users and questionnaires of experts in related fields. The method was studied.

• Safety and Health at Work
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• 제9권2호
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• pp.140-143
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• 2018

Background: The Occupational Safety and Health Monitoring and Assessment Tool (OSH-MAT) is a practical instrument that is currently used in the German woodworking and metalworking industries to monitor safety conditions at workplaces. The 12-item scoring system has three subscales rating technical, organizational, and personnel-related conditions in a company. Each item has a rating value ranging from 1 to 9, with higher values indicating higher standard of safety conditions. Methods: The reliability of this instrument was evaluated in a cross-sectional survey among 128 companies and its validity among 30,514 companies. The inter-rater reliability of the instrument was examined independently and simultaneously by two well-trained safety engineers. Agreement between the double ratings was quantified by the intraclass correlation coefficient and absolute agreement of the rating values. The content validity of the OSH-MAT was evaluated by quantifying the association between OSH-MAT values and 5-year average injury rates by Poisson regression analysis adjusted for the size of the companies and industrial sectors. The construct validity of OSH-MAT was examined by principle component factor analysis. Results: Our analysis indicated good to very good inter-rater reliability (intraclass correlation coefficient = 0.64-0.74) of OSH-MAT values with an absolute agreement of between 72% and 81%. Factor analysis identified three component subscales that met exactly the structure theory of this instrument. The Poisson regression analysis demonstrated a statistically significant exposure-response relationship between OSH-MAT values and the 5-year average injury rates. Conclusion: These analyses indicate that OSH-MAT is a valid and reliable instrument that can be used effectively to monitor safety conditions at workplaces.

• International Journal of Internet, Broadcasting and Communication
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• 제12권4호
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• pp.71-82
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• 2020

Traffic accidents due to excessive speed frequently occur in places where traffic signal controllers are installed, places where sharp curves exist, or places where the traffic signal cycle does not match the current time. These traffic accidents cause economic loss due to the destruction of road facilities and structures, and cause a big problem of increasing the number of traffic accident deaths. When a traffic accident occurs, leaving a tire mark before or after a car crash, pre-collision speed of the car is calculated using the law of conservation of momentum or the skid mark formula. In the skip skid mark generated in ABS brake vehicles and the combshaped yaw mark generated by tire trace caused by lateral sliding, there is a difference of 30-40% in the reliability of the vehicle speed calculated by the smite mark. In this paper, we propose an algorithm that can improve the calculation reliability in vehicle speed by using skid marks in order to compensate for this problem. In addition, we present an intelligent speed calculation algorithm for traffic safety and a computer simulation in order to prevent traffic accidents by estimating the speed of a vehicle, using Skid marks, Yaw marks, and ABS brake characteristics and fuzzy rules.