복합재를 이용한 부유식 해상 풍력 터빈용 주축 설계

이정완(Jung Wan Lee),이학구(Hak Gu Lee) 한국해양환경·에너지학회 2017 한국해양환경·에너지학회 학술대회논문집 Vol.2017 No.10

밀폐공간 질식재해 자료 분석을 통한 질식재해 요인 분석 (2005-2015)

이정완 ( Jung Wan Lee ),김태형 ( Tae Hyeung Kim ),하현철 ( Hyun Chul Ha ),박승욱 ( Cheng Xu Piao ),안광석 ( Kwangseog Ahn ) 한국산업보건학회 (구 한국산업위생학회) 2016 한국산업보건학회지 Vol.26 No.4

Objectives: Despite recent efforts to prevent suffocation disasters, a number of confined space accidents still happen and each year deaths continue to occur. There have been insufficient studies on the dangers of various potential disaster sites, such as manholes, septic tanks, reactors, and other tanks according to type, characteristics, task-specific disasters, equipment specific disasters, etc. The purpose of this study was to analyze recent suffocation disasters based on place and properties. Methods: In this study, we analyzed confined space accident cases from 2005 to 2015 in Korea and grouped them by type, size, monthly occurrence, continuous service period, accident location, person-specific group, age, employment, structural work and subcontracting work. We studied examples of accidents developed in other countries. Results: (1) We reviewed confined-space accident statistics, compared legal standards and analyzed cases of suffocation accidents in the United States and Japan. (2) Using a case study report from the Korea Occupational Safety & Health Agency, we specified confined-space accident statistics based on place, person-specific group, age, employment, structural work and subcontracting work. As a result we generated some precautions about confined-space accidents for the prevention of such accidents. Conclusions: Conclusions: Statistical analysis of recent suffocation disaster cases was performed to establish improvement measures, compare practices from developed countries, and develop precautionary measures accordingly. In this study, we presented the causes of disaster that occur in a confined space and proposed related preventive measures.

전자상거래 제공자의 외형적 환경(環境)이 사용자 편익(便益) 평가와 전자상거래 채택(採擇)에 미치는 영향

이정완 ( Jung Wan Lee ),김영이 ( Young Ei Kim ),Tantatape Brahmasrene 한국유통경영학회 2009 유통경영학회지 Vol.12 No.5

RI/RFI 하이브리드 공정을 이용한 복합재 착륙장치 도어 개발

이정완(Jung Wan Lee),오영석(Youngseok Oh),김정수(Jung Soo Kim),한성현(Seonghyeon Han),김영민(Yeong Min Kim),김상우(Sang-Woo Kim),엄문광(Moon-Kwang Um) 한국항공우주학회 2019 한국항공우주학회 학술발표회 논문집 Vol.2019 No.11

설계구조행렬(DSM) 및 인터페이스 매트릭스 설계를 통한 전투체계 임무신뢰도에 관한연구

이정완(Jeong-Wan Lee),박찬현(Chan-Hyeon Park),김소정(So-Jung Kim),김의환(Eui-Whan Kim),장중순(Joong Soon Jang) 한국산학기술학회 2019 한국산학기술학회논문지 Vol.20 No.9

무기체계 개발 및 운용과정에서의 신뢰도는 시스템이나 구성요소가 지정된 기간 동안 지정된 조건에서 필요한 기능을 수행하는 능력의 핵심 척도이며 임무달성의 평가를 위한 임무신뢰도는 전투의 승패를 좌우하는 중요한 지표이다. 임무신뢰도는 특정 기간 동안 주어진 임무가 이벤트나 환경상황에서 성공과 실패할 확률을 나타내며, 신뢰도 산출시 장비의 동작여부만을 고려하는 것이 아니라 시스템의 임무를 물리적 및 기능적으로 구분하여 임무의 수행 신뢰도를 산출하게 된다. 기존의 임무신뢰도는 임무에 따른 물리적인 연결만을 가지고 신뢰도 블록선도를 작성한 후 신뢰도를 산출하였다. 하지만, 현대 무기체계들은 발전하여 고도화되면서 장비 구조가 복잡해져 기능적 또는 물리적 연결에 따른 임무 구분이 필요한 경우 임무 연관성 표현이 불가하다. 이에 본 연구에서는 설계구조행렬과 인터페이스 매트릭스 기법을 사용하여 물리적 구조와 기능적 구조의 연관성을 표현하여 함정 전투체계 시스템 중 한 부분인 함포통제 시스템에 대하여 임무신뢰도를 산출하였다. 본 연구결과를 바탕으로 임무신뢰도 검증자료로 활용되기를 기대한다. Reliability in the course of weapons system development and operation is a key measure of the ability of a system to perform the required functions under specified conditions over a specified period of time, and the mission confidence for the assessment of mission fulfillment is an important indicator of victory or defeat in a battle. Mission reliability indicates the probability that a given task will succeed or fail in an event or environmental situation over a given period of time. The existing mission reliability was calculated after creating a confidence blow map with only physical connections based on the mission. However, as modern weapons systems evolve and advance, the related equipment structure becomes increasingly complex, making it impossible to express mission relevance when mission classification is required based on functional or physical connections. In this study, the mission reliability was calculated for a gun control system, which is part of a ship"s combat system, by expressing the association between the physical and functional structures using the design structure matrix technique and the interface matrix technique. We expect the study results to be used as verification data for mission reliability.

레이저를 이용한 의료기기용 미세 동축케이블의 실드선 탈피

이정완(Jeong Wan Lee),김정훈(Jung Hoon Kim) Korean Society for Precision Engineering 2009 한국정밀공학회지 Vol.26 No.9

PPG신호를 이용한 반지형 동맥혈압 측정 방법에 관한 연구

김정훈(Jung-hoon Kim),이정완(Jeong-wan Lee),최성욱(Sung-wook Choe) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5

While the convenient method for measuring blood pressure had been being researched, without delay and painless blood pressure(BP) measurements have been demanded for the patients who are requested to measure blood pressure regularly. For that reason, a lot of noninvasive blood pressure measurements have been developed and used. However, there are some undesirable characteristics to use noninvasive BP measurements for serious patients. The patients in need of intensive care are required to measure blood pressure continuously and exactly. But not only noninvasive blood pressure measurements are not continuous but also not enough to estimate blood pressure for certain patients. Therefore invasive blood pressure measurements are inevitably using in operating room or intensive care unit. Still, invasive blood pressure measurements have also some problems of infection and bleeding. As a result, novel method for measuring blood pressure is strongly recommended to be developed. The Purpose of this paper is for evaluating new method for measuring blood pressure that has been conducted by PPG. In order to apply this method to the patients, we suggest ring type measurement using PPG and existing method for noninvasive blood pressure measurement that compensates error.

2020년 KODISA 학술지 세계화 전략

윤명길(Myoung-Kil YOUN),이정완(Jung-Wan LEE) 한국유통과학회 2020 한국유통과학회 학술대회 논문집 Vol.2020 No.1

브랜드개성, 소비자 개성 간의 관계, 그러고

김영이 ( Young Ei Kim ),이정완 ( Jung Wan Lee ),이용기 ( Yong Ki Lee ) 한국마케팅과학회 2008 마케팅과학연구 Vol.18 No.3

본 연구는 브랜드 개성과 소비자 개성간의 인과성을 연구하고, 이러한 관계들이 기업브랜드 전략에 어떻게 적용되는 가를 실증분석 하였다. 분석자료는 한국의 자동차 소비자들로부터 수집되었으며, 요인분석, 분산분석, 그리고 구조모형분석을 이용하여 분석되었다. 본 연구의 결과는 브랜드 개성과 소비자 개성간의 유의한 관계가 있음을 보여주고 있다. 연구의 마지막에는 기업 브랜드 전략을 위한 관리적 시사점과 향후 연구방향이 제시되었다. Many consumers enjoy the challenge of purchasing a brand that matches well with their own values and personalities (for example, Ko et al., 2008; Ko et al., 2006). Therefore, the personalities of consumers can impact on the final selection of a brand and its brand personality in two ways: first, the consumers may incline to purchase a brand or a product that reflects their own personalities; second, consumers tend to choose a company that has similar brand personalities to those brands that are being promoted. Therefore, the objectives of this study are following: 1. Is there any empirical relationship between a consumer`s personality and the personality of a brand that he or she chooses? 2. Can a corporate brand be differentiated by the brand personality? In short, consumers are more likely to hold favorable attitudes towards those brands that match their own personality and will most probably purchase those brands matching well with their personality. For example, Matzler et al. (2006) found that extraversion and openness were positively related to hedonic product value; and that the personality traits directly (openness) and indirectly (extraversion, via hedonic value) influenced brand effects, which in turn droved attitudinal and purchase loyalty. Based on the above discussion, the following hypotheses are proposed: Hypothesis 1: the personality of a consumer is related to the brand personality of a product/corporate that he/she purchases. Kuksov (2007) and Wernerfelt (1990) argued that brands as a symbolic language allowed consumers to communicate their types to each other and postulated that consumers had a certain value of communicating their types to each other. Therefore, how brand meanings are established, and how a firm communicate with consumers about the meanings of the brand are interesting topics for research (for example, Escalas and Bettman, 2005; McCracken, 1989; Moon, 2007). Hence, the following hypothesis is proposed: Hypothesis 2: A corporate brand identity is differentiated by the brand personality. And there are significant differences among companies. A questionnaire was developed for collecting empirical measures of the Big-Five personality traits and brand personality variables. A survey was conducted to the online access panel members through the Internet during December 2007 in Korea. In total, 500 respondents completed the questionnaire, and considered as useable. Personality constructs were measured using the Five-factor Inventory (NEO-FFI) scale and a total of 30 items were actually utilized. Brand personality was measured using the five-dimension scale developed by Aaker (1997). A total of 17 items were actually utilized. The seven-point Likert-type scale was the format of responses, for example, from 1 indicating strongly disagreed to 7 for strongly agreed. The Analysis of Moment Structures (AMOS) was used for an empirical testing of the model, and the Maximum Likelihood Estimation (MLE) was applied to estimate numerical values for the components in the model. To diagnose the presence of distribution problems in the data and to gauge their effects on the parameter estimates, bootstapping method was used. The results of the hypothesis-1 test empirically show that there exit certain causality relationship between a consumer`s personality and the brand personality of the consumer`s choice. Thus, the consumer`s personality has an impact on consumer`s final selection of a brand that has a brand personality matches well with their own personalities. In other words, the consumers are inclined to purchase a brand that reflects their own personalities and tend to choose a company that has similar brand personalities to those of the brand being promoted. The results of this study further suggest that certain dimensions of the brand personality cause consumers to have preference to certain (corporate) brands. For example, the conscientiousness, neuroticism, and extraversion of the consumer personality have positively related to a selection of "ruggedness" characteristics of the brand personality. Consumers who possess that personality dimension seek for matching with certain brand personality dimensions. Results of the hypothesis-2 test show that the average "ruggedness" attributes of the brand personality differ significantly among Korean automobile manufacturers. However, the result of ANOVA also indicates that there are no significant differences in the mean values among manufacturers for the "sophistication," "excitement," "competence" and "sincerity" attributes of the corporate brand personality. The tight link between what a firm is and its corporate brand means that there is far less room for marketing communications than there is with products and brands. Consequently, successful corporate brand strategies must position the organization within the boundaries of what is acceptable, while at the same time differentiating the organization from its competitors.

케이블 감속을 이용한 소형 로봇의 개발과 실시간 제어에 관한 연구

홍종성(Hong Jong Sung),이정완(Lee Jung Wan) 강원대학교 산업기술연구소 2002 産業技術硏究 Vol.22 No.1

In this thesis, a three degrees of freedom robot, which is able to provide sufficient precision for various robot researches, has been developed. The cable mechanism is used as a basic transmission of robot joints. Based on an optimal design strategy, link and joint parameters are determined and then overall geometry of the robot is designed. As an architecture of robot control, real time control system using real time linux and RtiC-Lab(Real Time Controls Laboratory) is developed. This system, written in C and based on Linux O/S, include text editor, compiler, downloader, and real time plotter running in host computer for developing control purpose. Using these hardware and software, simple PD position control is implemented, the results shows the effectiveness of the system.