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      • 물리적 전처리에 의한 섬유의 특성 개선 연구 : 첨가제 사용에 의한 물리적 전처리 효율증대

        이민구 忠南大學校 大學院 2004 국내석사

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        In this study, fiber mechanical pretreatment before refining was executed with the addition of papermaking additives to find some synergistic effects on fiber property improvement. Three fiber furnishes (SwBKP, KOCC, and BCTMP), and five different additives (CMC, CPAM, PEO, NaOH, Na_(2)O_(2)) were used. It was confirmed again that fiber mechanical pretreatment using Hobart mixer was a special way to modify fiber properties, where fiber WRV (water retention value) increases without losing fiber length. For SwBKP, addition of small amount of CMC (0.2% OD basis), and for KOCC, PEO (0.2% OD basis) caused additional significant improvement of the fiber treatment effects. Other additives, however, did not cause adverse effects on the mechanical pretreatment, or better. For BCTMP, NaOH addition followed by mechanical pretreatment caused more than 20% improvement in tensile and tear strength simultaneously, compared to the control. The yellowing caused by the treatment of NaOH on BCTMP could be minimized by using Na_(2)O_(2) without losing the positive effect of NaOH. The results of this study summarized as follows; 1. Additives gave different effects on different furnishes. No additive was very efficient to all furnishes in the improvement of pretreatment effect. 2. In softwood, mechanical pretreatment with CMC gave better results in tensile and tear strength. CPAM and PEO addition in mechanical pretreatment gave no adverse effects. 3. In the case of KOCC, effect of mechanical pretreatment itself was much greater than the addition of additives. It was assumed that the impurities In KOCC may have caused less effectiveness of the additives. However, NaOH and PEO addition gave some improvement in mechanical pretreatment effect. 4. In BCTMP, only swelling agent gave large changes in its properties. Mechanical pretreatment with NaOH gave high tensile and tear strength more than 20%, compared to the control. 5. In BCTMP, brightness was decreased when NaOH was used. Use of Na_(2)O_(2) caused strength as well as brightness improvement 6. Duration time difference between 1 and 3 hours of mechanical pretreatment did not make significant differences in handsheet strength property development.

      • 1920년대 한국사회 변화와 한국성결교회의 부흥운동

        이민구 서울신학대학교 일반대학원 2012 국내석사

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        The purpose of this treatise is to research for Revivalism of The Korea Evangelical Holiness Church in 1920s, centering round the Four-Fold Gospel. In the 1920s, the society of Korea was changing into the public-centered society, due to the influence of Japanese culture colonization. In this process, Korean churches were trying to rise Revivalism by indirect methods such as enlightenment or social movements. Korean Evangelical Church, However, rose the Revivalism by direct methods like missionary society or revival. The reason was that the leaders of Korean Evangelism Church internalized The Four-Fold Gospel (Regeneration, Sanctification, Divine Healing, Second Coming) as their mission. This is very important point in history of Korea Church. Because modern Korea churches are in standstill and retrogression, this may be the ideal model that Korean churches requests. According to a survey conducted by HANMIJUN(a Preparatory Committee and a New Party), the churches which Korea society wants are the ones which follow Jesus Ministry - full of gospel, miracle and recovery. In this way the Korea evangelical Holiness church in the 1920s had historical value so far, in that they undertook Jesus ministry and led people to salvation. This study used the methods of Literature research, a Research of intelligently history, Social historical study and Psychological research. From these researches you can comprehend internalizing process of Four-Fold Gospel and study all aspects of Revivalism in the 1920s. The research shows that the Four-Fold Gospel has two kinds of cores, Mission and Holy Spirit. First, Regeneration, Sanctification, Divine Healing, and Second Coming are related to mission. So they ought to do mission. And while they were doing mission, they experienced powerful recovery of Holy spirit. In addition, as the early church did, people those who experienced recovery by the Holy Spirit, made their own household and regions evangelical places. All the people in this places experienced Holy spirit from little child to adults, including women, the underprivileged. If people didn't restricted the Holy Spirit, She kept poured to them and while they were praying, the evil ghosts left and the illness was healing. So all of Korea Evangelical Holiness Church members became a pastor, missionary at that time. It is no exaggeration to say that this was the most perfectly adapted form in the 1920s when Korean society were changing to public-centered society. In this atmosphere, The christians of Korea Evangelical Holiness Church in the 1920s growed from 1500 to 3,300, and churches were 20 to 60. Looking at the present situation world church, the Europe and the American's religious communities are declining. But the evangelism church which try to follow the faith of Bible are growing. Because these churches have hopes and peaces which people want to gain. When the churches recovered their the essence, churches start to grow. The Evangelical Holiness Church Revivalism in the 1920s is meaningful, for this point of view. Recovering this essence is always connected with revival. The Korea Churches must listen to the historical facts. Only in that way, the past revival history occurs in our time.

      • 대학생의 스킨스쿠버 참여동기와 재미요인 및 대학생활 만족의 인과관계

        이민구 한국해양대학교 대학원 2016 국내석사

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        This study is to investigate the effects of participation motivation and enjoyment factors on life satisfaction in college students participating in skin-scuba classes and to provide the practical research data for the development of the proper operation of skin-scuba classes for the leisure life which the university students may lack. For these purposes, technical statistics between questions were disposed in order to grasp the average and standard deviation on each variables, exploratory factor analysis and reliability analysis were conducted for the reliability and validity of the scale, and correlation analysis and multiple regression analysis were conducted to test the casuality of amusement factor, the motive of participation in skin-scuba class and the satisfaction with university life as the research methods. Research findings showed that the amusement factor and the motive of participation in skin-scuba class act as the important variables in the satisfaction with university life and it was predicted that the motive of participation in skin-scuba class and the amusement factor had interrelation with parameter. Therefore, a variety of programs reflecting the amusement factors should motivate the university students to participate in the skin-scuba class to increase the satisfaction with university life and to encourage the re-participation of students.

      • 지그 개선을 통한 판형 부품의 가공 변형 최소화에 대한 연구

        이민구 공주대학교 테크노융합대학원 2022 국내석사

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        ABSTRACT A study on the minimizing processing machining deformation of plate-shaped parts through jig improvement Min-Gu, Lee Department of Mechanical Mold Engineering, Kongju National University Graduate School of Technology & Convergence (Supervised by Professor Jae-Woong,Yun) The plate-shaped part can be set in various sizes, so it is a material that can be applied to various industries. When thin plate-shaped parts are machined on a milling machine, deformation occurs due to cutting force and many defects occur. In this study, the defects of plate-shaped parts that occur during milling were to be solved by changing the jig elements. Using finite element analysis, one method that can reduce deformation the most among the four jig element changes was derived, and the method was applied to the actual machining jig to produce parts with stable dimensions. The improvement method is to install two supports at 150mm intervals on the back side of the machined part, and through this improvement, it was possible to produce thin plate-shaped parts with stable dimensions within the allowable dimension of 0.03 from 0.0004 to 0.0217 mm.

      • 안전보건관리담당자 업무 이행 실태 분석을 통한 개선방안에 관한 연구 : - 경기도 지역을 중심으로 -

        이민구 서울과학기술대학교 2022 국내석사

        RANK : 247631

        The safety and health manager appointment system is a system that encourages safety and health management to be autonomously established in the small and medium-sized establishments by strengthening the efficiency of safety and health management and establishing an autonomously. The Occupational Safety and Health Act stipulates that safety and health managers perform important tasks to assist employers and guide and advise supervisors on safety and health. However, safety and health managers at the site are not clearly aware of the work given to them, and the system for appointing safety and health manager does not function according to the legislative purpose due to the lack of awareness of the employer's need for safety and health manager. Therefore, in this study, the problems of the system for appointing safety and health manager were identified and the work status was analyzed to suggest policy and institutional improvement measures. In this study, a survey was conducted on 260 people who were safety and health managers in Gyeonggi Province to identify the problems of the system for appointing safety and health manager, of which 221 were used as samples. For the collected data, frequency analysis, variance analysis, and t-test were performed using the SPSS 25.0 statistical package. In order to identify the problems analyzed in the survey in detail, in-depth interviews were conducted and analyzed for five people who were safety and health managers. Based on the research method and procedure of this study, the contents of the analysis of the work status of the safety and health managers are as follows. First, the system for appointing the safety and health manager was not operated normally. Safety and health work was mainly organized by indirect departments such as the general affairs department, and the safety and health manager did not play the role required by the law, such as concurrently serving as a supervisor. The establishment exposed its urgent appearance in keeping only the appointment obligation. Second, there were not many establishments that clearly understood the system for appointing safety and health manager due to the lack of publicity of the system for appointing safety and health manager and the negligence of supervision by supervisory agencies. Third, it was difficult to play its original role due to the lack of safety and health-related expertise of the safety and health manager. Qualification of appointment through completion of training for 16 hours, exemption from new education, and lack of time for maintenance education were obstacles to improving the expertise of safety and health managemer. Fourth, the safety and health manager is not clearly aware of the work prescribed by the law, and the lack of related data such as the work manual of the safety and health manager caused problems in understanding and interpretation of safety and health work. Fifth, as a safety and health manager, there was very little motivation, so incentives were provided or sufficient authority was not given in safety and health work. Based on the problems of the safety and health manager appointment system, improvement plans are presented as follows. First, policies should be prepared to actively participate in the safety and health manager appointment system at workplaces through the introduction of an incentive system to induce active participation in the safety and health manager appointment system and the utilization of disadvantage policies. Second, policies should be prepared to establish an autonomous safety and health management system for small and medium-sized establishments and to accurately perform their roles by safety and health manager through the promotion of projects to support the safety and health management system. Third, support plans should be prepared to establish a specific and systematic system through the distribution of work manuals and on-site support for safety and health managers. Fourth, it is proposed to improve the concurrent position system of the safety and health manager through partial revision of the Occupational Safety and Health Act. Fifth, in order to improve the expertise of safety and health manager, it is urgent to strengthen the completion standards of training courses and revise education-related regulations such as introduction of new education and change of maintenance education hours. Sixth, as a means of motivating safety and health manager to energize safety and health work, incentives such as payment of appointment allowances and reflection of personnel reviews and sufficient authority for safety and health work should be given so that the work should be performed faithfully. 안전보건관리담당자 선임제도는 영세 소규모 사업장의 안전보건관리의 효율성 강화 및 자율적 안전보건관리체계를 확립하여 안전보건관리가 사업장에 자율적으로 정착될 수 있도록 유도하는 제도이다. 산업안전보건법에서는 안전보건관리담당자로 하여금 안전 및 보건에 관하여 사업주를 보좌하고 관리감독자에게 지도·조언하는 중요한 직무를 수행하도록 그 역할을 규정하고 있다. 그러나 현장의 안전보건관리담당자는 자신에게 주어진 업무를 정확히 인지하지 못하고 있으며, 사업주의 안전보건관리담당자 필요성에 대한 인식 부족으로 인해 안전보건관리담당자 선임제도가 입법 취지에 맞는 기능을 하지 못하고 있다. 이에 본 연구에서는 안전보건관리담당자 선임제도의 문제점을 파악하고 업무 실태를 분석하여 정책적·제도적 개선방안을 제시하였다. 본 연구에서는 안전보건관리담당자 선임제도의 문제점을 파악하기 위하여 경기도 지역 안전보건관리담당자 260명을 대상으로 설문조사를 실시하였으며, 이 중 221부를 표본으로 사용하였다. 수집된 자료는 SPSS 25.0 통계프로그램을 이용하여 빈도분석, 분산분석, t 검정을 실시하였다. 설문조사에서 분석된 문제점을 세부적으로 파악하기 위하여 안전보건관리담당자 5명을 대상으로 심층면접을 실시·분석하였다. 본 연구의 연구방법과 절차를 토대로 도출한 안전보건관리담당자 업무 실태 분석내용은 다음과 같다. 첫째, 안전보건관리담당자 선임제도가 정상적으로 운영되지 않았다. 안전보건 업무는 주로 총무부서와 같은 간접부서에서 주관하였으며, 안전보건관리담당자가 관리감독자를 겸직하는 등의 법에서 요구하는 역할을 하지 못하였다. 사업장에서는 선임 의무만을 지키는 데 급급한 모습을 노출하였다. 둘째, 안전보건관리담당자 선임제도의 홍보 부족과 감독기관의 감독 태만으로 인해 안전보건관리담당자 선임제도를 명확히 이해하고 있는 사업장은 많지 않았다. 셋째, 안전보건관리담당자의 안전·보건 관련 전문성 부족으로 본연의 역할을 수행하기가 어려운 상태였다. 양성교육 16시간 교육 수료를 통한 선임 자격 부여와 신규교육의 면제 그리고 보수교육 시간 부족 등을 안전보건관리담당자의 전문성을 향상시키는 데 걸림돌이 되었다. 넷째, 안전보건관리담당자는 법에서 정한 업무를 명확히 알지 못하며, 안전보건관리담당자 업무 매뉴얼 등 관련 자료 부족은 안전보건 업무에 대한 이해와 해석에 문제를 일으켰다. 다섯째, 안전보건관리담당자로서 동기부여가 매우 부족하였는데 인센티브가 부족하며 안전보건 업무에 대한 충분한 권한이 주어지지 않았다. 안전보건관리담당자 선임제도의 문제점을 바탕으로 다음과 같이 개선방안을 제시한다. 첫째. 안전보건관리담당자 선임제도의 적극적 참여를 유도하기 위한 인센티브제도 도입과 미선임 시 불이익 정책의 활용을 통하여 사업장에서 안전보건관리담당자 선임제도에 적극적으로 참여할 수 있도록 정책이 마련되어야 한다. 둘째, 안전보건관리체계 지원 사업 추진을 통하여 영세 소규모 사업장의 자율적 안전보건관리체계를 구축하고 안전보건관리담당자가 역할을 정확히 수행할 수 있도록 정책이 마련되어야 한다. 셋째, 안전보건관리담당자 업무 매뉴얼 배포 및 현장 지원을 통한 구체적이고 체계화된 시스템을 구축할 수 있도록 지원방안이 마련되어야 한다. 넷째, 산업안전보건법 일부 개정을 통한 안전보건관리담당자 겸직체계 개선을 제안한다. 다섯째, 안전보건관리담당자의 전문성 향상을 위하여 양성교육 과정의 수료기준을 강화하고 안전보건관리담당자의 역량을 제고하는 한편, 신규교육 도입과 보수교육 시간 변경 등 교육 관련 규정의 개정이 시급하다. 여섯째, 안전보건관리담당자의 안전보건 업무에 활력을 불어넣을 동기부여 수단으로서 선임수당 지급, 인사고과 반영 등의 인센티브 및 안전보건 업무에 충분한 권한을 부여하여 업무를 충실히 수행할 수 있도록 하여야 한다.

      • Data-driven Design Approaches for Vehicle Specification Changes

        이민구 서울대학교 대학원 2020 국내박사

        RANK : 247631

        The automotive industry is entering a new phase in response to changes in the external environment through the expansion of eco-friendly electric/hydrogen vehicles and the simplification of modules during the manufacturing process. However, in the existing automotive industry, conflicts between structured production guidelines and various stake-holders, who are aligned with periodic production plans, can be problematic. For example, if there is a sudden need to change either production parts or situation-specific designs, it is often difficult for designers to reflect those requirements within the preexisting guidelines. Automotive design includes comprehensive processes that represent the philosophy and ideology of a vehicle, and seeks to derive maximum value from the vehicle specifications. In this study, a system that displays information on parts/module components necessary for real-time design was proposed. Designers will be able to use this system in automotive design processes, based on data from various sources. By applying the system, three channels of information provision were established. These channels will aid in the replacement of specific component parts if an unexpected external problem occurs during the design process, and will help in understanding and using the components in advance. The first approach is to visualize real-time data aggregation in automobile factories using Google Analytics, and to reflect these in “self-growing characters” to be provided to designers. Through this, it is possible to check production and quality status data in real time without the use of complicated labor resources such as command centers. The second approach is to configure the data flow to be able to recognize and analyze the surrounding situation. This is done by applying the vehicle’s camera to the CCTV in the inventory and distribution center, as well as the direction inside the vehicle. Therefore, it is possible to identify and record the parts’ resources and real-time delivery status from the internal camera function without hesitation from existing stakeholders. The final approach is to supply real-time databases of vehicle parts at the site of an accident for on-site repair, using a public API and sensor-based IoT. This allows the designer to obtain information on the behavior of parts to be replaced after accidents involving light contact, so that it can be reflected in the design of the vehicle. The advantage of using these three information channels is that designers can accurately understand and reflect the modules and components that are brought in during the automotive design process. In order to easily compose the interface for the purpose of providing information, the information coming from the three channels is displayed in their respective, case-specific color in the CAD software that designers use in the automobile development process. Its eye tracking usability evaluation makes it easy for business designers to use as well. The improved evaluation process including usability test is also included in this study. The impact of the research is both dashboard application and CAD system as well as data systems from case studies are currently reflected to the design ecosystem of the motors group. 자동차 산업은 친환경 전기/수소 자동차의 확대와 제조 공정에서의 모듈 단순화를 통해서 외부 환경의 변화에 따른 새로운 국면을 맞이하고 있다. 하지만 기존의 자동차 산업에서 구조화된 생산 가이드라인과 기간 단위 생산 계획에 맞춰진 여러 이해관계자들과의 갈등은 변화에 대응하는 방안이 관성과 부딪히는 문제로 나타날 수 있다. 예를 들어, 갑작스럽게 생산에 필요한 부품을 변경해야 하거나 특정 상황에 적용되는 디자인을 변경할 경우, 주어진 가이드라인에 따라 디자이너가 직접 의견을 반영하기 어려운 경우가 많다. 자동차 디자인은 차종의 철학과 이념을 나타내고 해당 차량제원으로 최대의 가치를 끌어내고자 하는 종합적인 과정이다. 본 연구에서는 여러 원천의 데이터를 기반으로 자동차 디자인 과정에서 활용할 수 있도록 디자인에 필요한 부품/모듈 구성요소들에 대한 정보를 실시간으로 표시해주는 시스템을 고안하였다. 이를 적용하여 자동차 디자인 과정에서 예상 못한 외부 문제가 발생했을 때 선택할 구성 부품을 대체하거나 사전에 해당 부품을 이해하고 디자인에 활용할 수 있도록 세 가지 정보 제공 채널을 구성하였다. 첫 번째는 자동차 공장 내 실시간 데이터 집계를 Google Analytics를 활용하여 시각화하고, 이를 공장 자체의 자가 성장 캐릭터에 반영하여 디자이너에게 제공하는 방식이다. 이를 통해 종합상황실 등의 복잡한 인력 체계 없이도 생산 및 품질 현황 데이터를 실시간으로 확인 가능하도록 하였다. 두 번째는 차량용 주차보조 센서 카메라를 차량 부착 뿐만 아니라 인벤토리와 물류센터의 CCTV에도 적용하여 주변상황을 인식하고 분석할 수 있도록 구성하였다. 차량의 조립 생산 단계에서 부품 단위의 이동, 운송, 출하를 거쳐 완성차의 주행 단계에 이르기까지 데이터 흐름을 파악하는 것이 디자인 부문에 필요한 정보를 제공할 수 있는 방법으로 활용되었다. 이를 통해 기존 이해관계자들의 큰 반발 없이 내부의 카메라 기능으로부터 부품 리소스와 운송 상태를 실시간 파악 및 기록 가능하도록 하였다. 마지막으로 공공 API와 센서 기반의 사물인터넷을 활용해서 도로 위 차량 사고가 발생한 위치에서의 현장 수리를 위한 차량 부품 즉시 수급 및 데이터베이스화 방법도 개발 되었다. 이는 디자이너로 하여금 가벼운 접촉 사고에서의 부품 교체 행태에 대한 정보를 얻게 하여 차량의 디자인에 반영 가능하도록 하였다. 시나리오를 바탕으로 이 세 가지 정보 제공 채널을 활용할 경우, 자동차 디자인 과정에서 불러들여오는 부품 및 모듈의 구성 요소들을 디자이너가 정확히 알고 반영할 수 있다는 장점이 부각되었다. 정보 제공의 인터페이스를 쉽게 구성하기 위해서, 실제로 디자이너들이 자동차 개발 과정에서 디자인 프로세스 상에서 활용하는 CAD software에 세 가지 채널들로부터 들어오는 정보를 사례별 컬러로 표시하고, 이를 시선추적 사용성 평가를 통해 현업 디자이너들이 사용하기 쉽게 개선한 과정도 본 연구에 포함시켜 설명하였다.

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