• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 추계학술대회 논문집 Vol.15
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• pp.272-275
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• 2002

An ozone condensation system is evaluated in the viewpoint of an ozone supplier for oxide thin film growth. Ozone is condensed by the adsorption and distillation method. Then their concentrations are analyzed by three methods; ultraviolet absorption, thermal decomposition and Q-mass analyzing methods. Thermal decomposition method is found to be available to the concentration evaluation from dilution to highly condensed ozone. The highest ozone concentration condensed by the adsorption method is evaluated to be 96 mol%. The ozone is supplied for a sufficiently long time to grow oxide thin films.

• Advances in materials Research
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• 제8권3호
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• pp.219-235
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• 2019

This research is devoted to analyzing mechanical-thermal post-buckling behavior of a micro-size beam reinforced with graphene platelets (GPLs) based on geometric imperfection effects. Graphene platelets have three types of dispersion within the structure including uniform-type, linear-type and nonlinear-type. The micro-size beam is considered to be perfect (ideal) or imperfect. Buckling mode shape of the micro-size beam has been assumed as geometric imperfection. Modified couple stress theory has been used for describing scale-dependent character of the beam having micro dimension. Via an analytical procedure, post-buckling path of the micro-size beam has been derived. It will be demonstrated that nonlinear buckling characteristics of the micro-size beam are dependent on geometric imperfection amplitude, thermal loading, graphene distribution and couple stress effects.

• 한국컴퓨터정보학회논문지
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• 제22권7호
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• pp.31-37
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• 2017

There are lots of combined battlefield elements which complete the war. It looks problematic when collecting and analyzing these elements and then predicting the situation of war. Commander's experience and military power assessment have widely been used to come up with these problems, then simulated combat training program recently supplements the war-game models through recording real-time simulated combat data. Nevertheless, there are challenges to assess winning factors of combat. In this paper, we characterize the combat element (ce) by clustering simulated combat data, and then suggest multi-layered artificial neural network (ANN) model, which can comprehend non-linear, cross-connected effects among ces to assess mission completion degree (MCD). Through our ANN model, we have the chance of analyzing and predicting winning factors. Experimental results show that our ANN model can explain MCDs through networking ces which overperform multiple linear regression model. Moreover, sensitivity analysis of ces will be the basis of predicting combat situation.

• 한국신뢰성학회지:신뢰성응용연구
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• 제9권4호
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• pp.319-329
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• 2009

The airbag module is an inflatable restraint system that inflates within 0.05 seconds automatically in a collision to protect the occupants. The airbag fabrics used in the module are required to have the good resilience and strength and also to have retained at least 80% of mechanical properties after using longer than 10 years. In this study, we develop an accelerated test method in order to predict the lifetimes of airbag. In this test, we select temperature and humidity as environmental stresses by analyzing the failure mechanisms of coated and uncoated nylon 66 fabrics. It is found that the degradation of airbag fabrics is effectively accelerated under the combined conditions of high temperature and humidity. Analyzing the results of the accelerated test, the lifetimes of airbag fabrics are predicted to be longer than 10 years.

• 대한안전경영과학회지
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• 제6권4호
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• pp.39-46
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• 2004

The Study lay Emphasised on to Investigate Human Related Causes of a Pointed End Equipment Accident and the Basic data for Analyzing Human-Error Prevention Program. Peter Son's Model of Human-Error Accident Causation and Cooper's Model of Safety Culture Were Applied to Analyze the Severe Cause of a Pointed End Equipment for Last 5 Years. Through to Analyzing the Cause of Equipment Accident of Human-Error, Expert's Opinion and Experience Theory Method was Reflected. The Analyses Showed What the Immature and Inexperient Error Were Major Causes of a Pointed and Equipment Accident. The Cause of Human-Error was Found with Respect to Human, Tasks, Acknowledge, Organization.

• 대한안전경영과학회지
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• 제1권1호
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• pp.159-169
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• 1999

This paper applies the Analytic Hierarchy Process(AHP) to analyzing the causes and countermeasures of the accidents by the dangerous machines. The AHP is the decision supporting tool considering several objectives and criteria, and synthesizing a number of decision makers' opinions to find the best alternative. It has the merit to be able to consider not only quantitative factors but also qualitative factors. Because this paper focuses the thoughts of the workers about the dangerous factors in working space including machines, work environment and tools, the AHP is the most suitable method for this study. This study using the AHP can be used as useful tool analyzing the important causes of the accidents by the dangerous machines and deciding the urgent countermeasures.

• 수산해양교육연구
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• 제23권3호
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• pp.468-476
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• 2011

This research is to investigate the effects of exercise adherence due to the leisure satisfaction of marine sports participants. In this paper, we will provide a basic database to vitalize marine sports. In order to analyze the result, we conducted a survey targeting 326 participants from 2010 Busan metropolitan city marine sports. The following results are obtained after analyze the data using SPSS/PC+ Win. 15.0 with a correlation analysis and a multiple regression analysis. First, all of the sub-factors from leisure satisfaction and exercise adherence show a positive correlation after analyzing the relationship between the leisure satisfaction and the exercise adherence of marine sports participants. Second, after analyzing the effects of exercise adherence according to the leisure satisfaction of marine sports participants, the result showed that the egoistic satisfaction influences the exercise capacity. Therefore, the data shows that the psychological satisfaction affects exercise environment, exercise companion, exercise habits and exercise attention.

• 동력기계공학회지
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• 제14권6호
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• pp.47-53
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• 2010

A stabilizer link connects the stabilizer bar to the lower arm of the suspension. When a vehicle is turning, lateral forces from the tire are transmitted through the stabilizer link into the stabilizer bar. The stabilizer bar will twist, thus adding rigidity to the vehicle body. In this study, the stabilizer link body was manufactured by using composite material with POM-GF25%. Therefore, the strength evaluation of stability link body with composite material carried out from tensile, wear and fatigue test. The tensile strength between the stability link body with composite material and the rod with knurling was the largest of four types of rod. In Analyzing materials property using optical sensing technique of stabilizer link for automobile parts, its has been identified the safety.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.1817-1827
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• 2009

Although human error is recognized as the primary cause of railway accidents and incidents, there have been limitations in finding the root causes of errors and developing effective corrective actions in the Korean railway industry, due to the absence of a systematic method and lack of professional knowledge and skills of investigators. Therefore, there has been a strong need for a systematic methodology for human error analysis. This paper introduces a methodology for analyzing human error m railway operations, called HEAR (Human Error Analysis and Reduction). HEAR is intended to help analysts identify the sequences and various levels of causes of operators' erroneous actions in railway accidents or incidents and make recommendations to eliminate or reduce the future possibility of similar errors and accidents. It was developed based on a thorough investigation of various techniques for human errors analysis and feedback from field investigators.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 추계학술대회
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• pp.955-956
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• 2013

최근 블로그, 카페 및 SNS(Social Network Service)와 같이 다양한 소셜 네트워크 환경을 통해 사용자 자신의 의견 등을 표현하고 있다. 이에 이러한 데이터를 수집 분석하는 시스템을 개발하는 업체에서는 소셜 네트워크 상의 정보를 수집하여 데이터의 패턴을 분석하여 마케팅 등에 이용하는 기술을 제안하고 있다. 그러나, 기존 기술에서는 소셜 네트워크 상에 존재하는 다양한 유형의 문서나 정보를 모두 수용할 수 없어서 그 분석에 제한이 있다. 본 논문에서는 이러한 문제점을 해결하기 위해 소셜 네트워크 정보를 실시간으로 수집 및 분석함에 있어서, 소셜 네트워크상에 존재하는 다양한 유형의 문서나 정보를 모두 수용할 수 있고, 이용자의 필요에 따라 분석 결과를 제공할 수 있는 소셜 네트워크 정보 수집 및 분석 시스템을 제공하고자 한다.