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      • 울산광역시 교통사고 유형별 공간적 분포 특성 분석

        김미송,구신회,표경수 한국재난정보학회 2016 한국재난정보학회 학술대회 Vol.2016 No.11

        교통사고의 발생요인에는 다양한 원인들이 있지만 본 연구에서는 공간적으로 접근하여 사고유형별 분포 특성을 도출하기 위해 공간적 자기상관성 분석을 수행하였다. 논문에서는 2012년부터 2014년까지 울산광역시에서 발생된 교통사고를 대상으로 분석을 수행하였다. 그 결과 울산시 전체 교통사고 약 53%는 안전운전불이행이며 다음으로는 안전거리미확보, 신호위반 순으로 나타났다. 밀도분석 결과는 사고유형별로 분포가 차이가 있었으며 안전운전불이행의 경우 가장 큰 군집은 중심시가지인 달동과 삼산동 중심에 나타났으며 중앙선침범은 도시의 중심부 보다는 면지역에 넓게 퍼져서 발생되었으며 산업단지가 있는 동구지역에 군집이 크게 나타났다. 따라서 읍면동별 공간적 특성을 파악하기 위해 Moran’s I분석과 LISA분석을 수행한 결과 안전운전불이행, 안전거리미확보, 신호위반, 교차로운행방해 모두 중심시가지인 신정동, 달동, 삼산동이 공간적 자기상관성이 높았으며 중앙선침범의 경우 밀도분석 결과와 마찬가지로 중심시가지 이외에 읍면 지역도 자기상관성이 더 높게 나타났다. 이를 통해 사고유형별 공간의존성 및 이질성을 파악하여 교통사고 다발지역을 도출하고 이를 토대로 지역특성에 맞는 저감 대책 마련에 활용되고자 한다.

      • KCI등재

        Flip Chip - Chip Scale Package Bonding Technology with Type 7 Solder Paste Printing

        김미송,홍원식,명인 대한용접접합학회 2021 대한용접·접합학회지 Vol.39 No.4

        In this study, thermo-compression(TC) and vacuum reflow(VR) bonding processes of fine pitch interconnection were optimized using Type 7 Sn-3.0Ag-0.5Cu solder paste. A chip with Cu pillar Sn-2.5Ag bumps and BT substrate with ENEPIG surface finish were used, and the thickness and the aperture ratio of the metal mask were 30 ㎛/50 ㎛ and 70%/100%, respectively. As a result of optimizing the printing process, a metal mask with a thickness of 30 ㎛ and an aperture ratio of 100% was selected. As a result of the TC and VR bonding processes optimization, Cu₆Sn₅ and (Cu,Ni)₆Sn₅ IMC layers were formed on the top and bottom of the solder joint, respectively. In the conventional TC process sample, the thickness of the solder was measured to be 4.1 ㎛, and the IMC thickness ratio was calcu- lated to be 40%. Also, in the TC and VR process samples with solder paste, the thickness of the solder was meas- ured to be 6.5 ㎛ and 10.3 ㎛, respectively, and the ratio of the IMC thickness was calculated to be about 32% and 43%. It was expected that it would be beneficial to reliability by reducing the occurrence and propagation of cracks in the solder joint due to the effect of lowering the IMC thickness ratio as the volume of the solder becomes larger than that of the conventional TC process.

      • KCI등재

        초등예비교사를 위한 컴퓨팅 사고력 자기평가 방법

        김미송,최형신 한국정보교육학회 2018 정보교육학회논문지 Vol.22 No.1

        It is urgent in the context of the Fourth Industrial Revolution that students become creative and integrative thinkers. In this vein, in the last few years, drawing upon constructivism as an innovative learning paradigm, new coding curricula using MIT’s Scratch have been introduced in the number of countries to enhance computational thinking (CT). However, constructivism encouraging collaborative and active learning may not be explicitly utilized in instructional design focusing mainly on learning to code as technical skills – some of which exist today in large numbers of school and after-school code activities. To respond to such a misleading way of developing CT through coding, the present study aims to propose the benefits of CT self-assessment rubrics for pre-service teachers within a CT course entitled “Problem Solving by Computational Thinking”. Our finding shows how meaningful collaborative CT self-assessment in a group impacted their learning of CT. We end this paper with the discussion of implications of our findings for CT assessment towards a new paradigm in education. 창의적 사고와 융합이 중요시되는 4차 산업 혁명 시대를 성공적으로 맞이하기 위해 전 세계적으로 컴퓨팅 사고력(Computational Thinking: CT) 증진을 위한 코딩(coding) 교육이 대두되고 있다. 특히 MIT 미디어 연구소 에서 개발한 스크래치(Scratch)를 활용한 코딩 교육은 기존의 전통적인 교육패러다임을 벗어나서, 학습자들이 능동적이고 협력적 활동에 참여하는 구성주의 교수법을 강조하고 있다. 하지만 이러한 교육 패러다임 변화에 대한 인식이 부족하기 때문에 실제 학교나 사교육 현장에서는 코딩 교육이라는 명목하에 프로그래밍 언어에 관련된 테크닉이 주로 강조 되는 경향이 있다. 이에 본 연구는 구성주의적 교수-학습에 입각한 CT 평가 도구를 개발하고 실행하는 것에 초점을 두었다. 그리고 CT 자기 평가 도구의 교육적 가치를 연구하기 위해 ‘컴퓨팅 사고력을 활용한 문제해결’이라는 과목을 수강한 초등예비교사들이 CT 역량 평가 루브릭을 활용한 결과를 분석하였다. 본연구의 결과를 통해 협력이 강조되는 구성주의 교수법을 반영한 CT 자기 평가를 디자인하고 실현하는 과정을 매개로 하여, 초등예비교사들이 문제해결 과정을 체험하고 CT역량을 증진시키는 것을 확인 할 수 있었다. 본 연구의 결과를 통해 도출된 CT 교육 및 평가에 대한 개선점을 제언하였다.

      • KCI등재

        SiC Device와 ZTA AMB 기판 적용 파워모듈의 무가압 Silver Sintering 접합특성

        김미송,오철민,홍원식 대한용접접합학회 2019 대한용접·접합학회지 Vol.37 No.2

        We have developed pressureless silver sintering module using zirconia toughened alumina (ZTA) substrate made of active metal brazing (AMB) and SiC device for power module. The silver paste was printed with a metal mask of 80, 120, and 150 ㎛ thickness, respectively. The void content was measured by x-ray images after pressureless silver sintering under a vacuum and nitrogen atmosphere. In order to evaluate the durability against thermal stress of the sintered module, the thermal cycle test (TC) and the high temperature storage test (HTS) were conducted. The void content and bond strength before and after the environment test were measured. As a result, the void content did not change, but the bonding strength was decreased after TC and increased after HTS. Crack was generated at between silver sintered joint and ZTA substrate after TC test. Also, we observed that Cu-Ag alloy layer was formed between the copper AMB and silver sintered layer after HTS, which finally leaded to improve the bonding strength.

      • KCI등재

        친환경농산물 선택기준이 구매의도에 미치는 영향 : 소비자 태도와 신뢰의매개, 조절효과를 중심으로

        김미송,동환,이기황,윤명길 한국유통과학회 2013 유통과학연구 Vol.11 No.12

        Purpose- This study investigated the effects of consumers'selection criteria for environment-friendly agricultural products on purchase intention and the effects of consumers' attitudes and the reliability of environment-friendly agricultural products on purchase intention by using the theory of planned behavior. Subjective norms of variables of behavioral intention, attitudes toward behavior and control of the behavior were used to create selection criteria, consumers' attitudes and reliability of environment-friendly agricultural products. The study investigated the effects of consumers' selection criteria, attitudes, and reliability of environment-friendly agricultural products on purchase intention constructing models and hypotheses of mediation and moderation between selection criteria for agricultural products and purchase intention by consumers' attitudes and reliability. Research design, data, and methodology- The findings were as follows: first, consumers' selection criteria for environment-friendly agricultural products had a significantly affirmative influence upon purchase intention. Health was the most important factor of selection criteria convenience was more important than quality and familiarity was next. Consumers' attitudes and trust had a significant influence on purchase intention. Second, testing showed that consumers' attitude and trust partially mediated selection criteria: sub-factors and purchase intention were important in selection criteria. Third, testing showed that consumers' attitude and trust had a significant moderation effect between selection criteria and purchase intention. In the test of the moderation effect between sub-factors of selection criteria and purchase intention, consumers' attitude had a significantly positive influence upon health, convenience, and familiarity, and had no significant influence upon quality and purchase intention. Consumers' trust had no significant influence upon health, convenience, and quality. Results- The study provided several theoretical implications:first, an empirical analysis was undertaken with selection criteria for environmental-friendly agricultural products, consumers' attitude, and trust to investigate subjective norms, attitude toward behavior and control of behavior based on the theory of planned behavior. Second, this study investigated both the mediation effect and moderation effect of consumers' subjective norms on attitudes toward behavior, the mediating effects of perceived behavior control and changes of behavioral intention depending upon size and direction of the variables. This study also provided several practical implications. Conclusions- First, consumption of environment-friendly agricultural products did not increase despite rapid increase of production therefore, promotion of consumption and distribution was needed considering the supply and demand of the products. Second, definite standards for selection criteria were suggested to build up consumers' attitude and trust. Consumers' attitude could be improved by factors including the brand of environment-friendly agricultural products, consistent quality, solving physiological problems caused by adverse effects of environmental problems, supplementary approaches, treatment of adverse effects by eating food, and the development and supply of products in accordance with changes of lifestyle. Finally, consumers' demand for sub-factors of selection criteria could be much higher than health, convenience, and quality of the products. Therefore, a process was needed that could continuously check consumers' needs for the products. Limitations were described at the end of the study.

      • KCI등재

        학교장의 변혁적 리더십이 소속 교사의 자질에 미치는 영향 연구

        김미송,하재룡 한국인사행정학회 2012 한국인사행정학회보 Vol.11 No.3

        본 연구의 목적은 학교장의 변혁적 리더십이 교사자질에 어느 정도 영향을 미치는지를 서울특별시 인문계 고등학교의 교사를 대상으로 검증한 것이다. 변혁적 리더십은 구성원들의 질적인 변화를 추구하는 새로운 리더십 패러다임으로 제기되고 거래적 리더십 보다 리더십 효과가 커다는 선행연구들이 있다. 검증 결과, 학교장의 변혁적 리더십의 구성요소 중 지적자극 변수가 교사자질과 상관관계가 있었다. 즉, 학교장의 변혁적 리더십 인식이 높을수록 교사 자질이 높아짐을 알 수 있다. 이 의미는 학교장이 스스로 창의적인 업무수행과 참신한 아이디어를 제시하고 문제해결능력을 보여 교사가 새로운 방법으로 문제에 접근하고 행동이 변화하도록 자극을 주기를 원하고 있다고 볼 수 있다.

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