• Prospectives of Industrial Chemistry
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• v.23 no.6
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• pp.25-36
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• 2020

용액공정을 통해 유기 전자소자를 대면적으로 제조하는 것은 다양한 장치 구성 요소(반도체, 절연체, 도체)의 패터닝 및 적층이 필요하기 때문에 매우 어려운 과제이다. 본 연구에서는 4개의 광 가교 기능기를 가지는 3차원 사면체 가교제인 (2,2-bis(((4-azido-2,3,5,6-tetrafluorobenzoyl)oxy)methyl)propane-1,3-diyl bis(4-azido-2,3,5,6-tetrafluorobenzoate) (4Bx)를 활용하여 용액공정을 기반으로 형성된 전자재료 박막을 고해상도로 패터닝 및 적층하는 기술을 개발하고, 이를 사용하여 고분자 박막 트랜지스터(PTFTs) 및 논리회로 어레이 제작을 진행하였다. 4Bx는 다양한 용액공정이 가능한 전자재료와 용매에 쉽게 혼합될 수 있으며, 자외선(UV)에 의해 가교제가 광 활성화되어 전자재료와 가교 결합을 형성할 수 있다. 4Bx는 기존의 2개의 광 가교 기능기를 갖는 가교제에 비해 높은 가교 효율로 인해 적은 양을 첨가하여도 완전하게 가교된 전자재료 박막을 형성할 수 있어 전자재료의 고유한 특성을 보존할 수 있다. 더욱이, 가교된 전자재료 박막은 화학적 내구성이 향상되어 고해상도 미세 패터닝을 할 수 있을 뿐만 아니라 용액공정을 통해 전자소자를 구성하는 전자재료의 적층이 가능하다. 4Bx의 광 가교 방법은 전용액공정을 통한 전자소자의 제작에 대한 혁신적인 방안을 제시한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.817-820
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• 2008

Development of computer and internet has permitted cyber education transcending time and space, which escapes traditional classroom. As a result, the study of learner's own leading in Web-based instruction environment can be possible. In order to perform it effectively, suitable helps and advices, called scaffolding, must be offered. In this pater, we select a principle of computer in information technology basic subject of technical high school, and design and implement the web contents that provide the proper scaffolding for learners.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.258-260
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• 2023

목포해양대학교와 삼성중공업은 2021년 공동 연구를 통하여 '실습선 기반 원격/자율 운항 선박 시스템 개발 및 검증'을 수행하였고 이를 통하여 목포해양대학교 실습선인 세계로호를 활용하여 삼성중공업의 자율운항 선박 시스템(Autonomous Navigation System)인 SAS의 Test Bed 시연 실험 시스템을 구축하여 2022년 자율운항 선박(MASS) 기술 요소에 대한 시뮬레이션 기반 SAS(Samsung Autonomous Ship) System 검증 및 '운항 노선에 대한 설정을 통한 선박 자율운항 검증'을 위한 실선·실해역 실험을 통해 이를 시연 및 검증을 시행하였다. 특히 의미 있는 것은 자율운항선박 실선 테스트 과정 중 발생할 수 있는 모든 위험요소 분석을 위해 한국선급과 HAZID Workship을 실시하였고, 이를 통해 국내최초 자율운항실험용 기국 승인 및 선급임시검사 완료 후 실험이 진행되었다는 것이다. 이 연구에서는 실습선 기반 자율운항 선박 실해역 실험 연구를 소개하고 그 결과를 운항자 입장에서 분석하여 향후 보완하여야 할 사항을 제시하였다.

• Journal of Practical Engineering Education
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• v.13 no.3
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• pp.515-532
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• 2021

The purpose of this study was to analysis of PBL for Korean Apprenticeship Program in Mechanical Engineering. The details of the study were as follows: First, the perception related to the PBL of Korean apprenticeship program was investigated. Second, the utilization and the operational difficulties of PBL for Korean Apprenticeship Program were investigated. Third, the supporting system for PBL was suggested. Research methods were literature research, questionnaire survey and FGI. The survey was conducted online from July 15 to August 14, 2021. A total of 515 respondents responded. A total of 108 in 515 respondents were in Mechanical Engineering. FGI conducted a total of 25 people who actual use PBL in the field of Korean Apprenticeship Program. Conclusions and suggestions based upon the result of this study are as follows. First, It is necessary to improve the utilization of PBL for Korean Apprenticeship Program in Industry. Second, PBL is necessary to apply optionally according to the job and field situation. Third, it is necessary to support system of evaluation for PBL in Korean Apprenticeship Program. Finally, related operation model and guideline need to be prepared for best practice.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.6D
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• pp.1003-1010
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• 2006

This study developed a traffic accident information management system based on WebGIS that can process a lot of data for giving effectively diagnosis of traffic accidents in serious damage circumstances by traffic accident. Also, this study presents a way to compose and to convey traffic accident information. In addition, non-spatial attributes as well as spatial attributes about traffic accidents information be integrated and managed by the system. To provide Web service, we developed modules that can supply visually spatial information and traffic accidents data through ASP, Javascript, ArcIMS based on Web and constructed a server. And constructed system include a function that offer the now situation of traffic accident in real time, which supply the statistical data of traffic accident through Web as soon as user entry data in comparison with previous way that preparatory period until traffic accidents data is supplied to peoples had been long. Traffic accidents are analyzed with only nonspatial attribute by simply collecting in the past. However, system constructed by this study offer new function that can grasp visually accident spot circumstance and use detailed content and accurate location data as well as statistical data of traffic accidents. Also, it offer interface that can connect directly with accident charge policeman.

• Applied Chemistry for Engineering
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• v.33 no.4
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• pp.343-351
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• 2022

Lithium-ion batteries (LIBs) are considered promising energy storage devices with good performance such as high energy density, slow self-discharge rate, high rate charge capacity, and long battery life. However, the application of these LIBs in the high-energy density electric vehicle and large device industries poses a major safety problem. In order to solve this problem, developing a material having high thermal stability and intrinsic safety is the ultimate solution for improving the stability and electrochemical performance of LIBs. This review introduced a surface modification technology of a separator to overcome the stability problem of a commercial separator, and summarized and summarized the research trends using the modified separator for a lithium-ion battery. Based on this, the future prospects for the separator development by surface modification were discussed.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2012.05a
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• pp.303-304
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• 2012

공업적으로 널리 사용되는 내식강의 전해연마는 주로 고농도의 인산염 전해액 기반에 황산과 질산 첨가된 용액에서 $70^{\circ}C$ 이상의 고온에서 행해지다 보니 폐액 처리와 작업 환경이 좋지 않아 기피 기술로 인식 되어 있다. 본 연구에서는 환경 친화적인 상온 공정을 개발 하고자 에틸렌 글리콜 용액에 여러 가지 첨가제를 첨가하여 그 효과를 살펴보고 최적 조성과 공정 조건을 확립 하고자 하였다. 틸렌 글리콜에 물과 질산 암모니움을 첨가하여 점도와 pH, 전류 전압 특성을 구하고 여기에 첨가제인 설파메이트와 암모니움 클로라이드 첨가량을 정하고 각각의 효과를 확인 하였다. 이러한 결과를 바탕으로 SUS 316 재질에 대한 최적 연마조건을 설정하기 위해 조도 변화, 광택도 및 표면 조직 변화와 전해연마기구를 비교 검토하였다.

• Applied Chemistry for Engineering
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• v.30 no.1
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• pp.29-33
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• 2019

Carbon nanotubes, nanofibers and powders were used for acetylene adsorption experiments. A total of 15 different experiments were designed by 3-level of Box-Behnken Design (BBD) with 3 factors including the Pd concentration of 0 to 5%, adsorption temperature of 30 to $80^{\circ}C$ and $C_2H_2/CO_2$ of 3 to 10. Based on those data, a second order polynomial regression analysis was used to derive the adsorption amount prediction equation according to operating conditions. The adsorption temperature showed the greatest influence index while the $C_2H_2/CO_2$ ratio showed the smallest according to the F-value measurement of the ANOVA analysis. However, there was little interaction between major factors. In the adsorption optimization analysis, a 22.0 mmol/g was adsorbed under the conditions of Pd concentration of 3.0%, adsorption temperature of $47^{\circ}C$ and $C_2H_2/CO_2$ of 10 with 95.9% accuracy.

• Journal of the Korea Society of Computer and Information
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• v.14 no.6
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• pp.33-40
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• 2009

In this thesis, for the assessment of software development process for project complexity and project size : one of digital watermarking algorithm is selected and examined. Digital watermarking provides a solution to illegal copying of digital contents and has many other useful applications, including web broadcast monitoring, transaction tracking, authentication, copy control and device control. This thesis focused on the method for customizing software development path, considering the project environments and characteristics. The selection standard of software development path is composed of process items, based on the ISO/IEC 15721 Information Technology Guide for ISO/IEC 12207 (Software Life Cycle Process) and ISO/IEC 15504 Information technology - Process assessment. To evaluate the algorithm, a system for selecting development path, which reflected algorithm, was examined.

• Journal of Science and Technology Studies
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• v.2 no.1 s.3
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• pp.63-83
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• 2002

This article examines the historical and general characteristics of science and technology policy in Korea. Historical characteristics are analyzed through formation period, growth period, and transition period. Korea institutional sis for the promotion of science and technology was made from the initial stage of industrialization. As national R&D programs were launched, technological activities in the private sector were rapidly increased from the 1980s. Korea pursued new directions of science and technology policy with the formation of related laws and Plans from the late 1990s. General characteristics are analyzed by the concept of 'policy regime'. The prime policy goal of science and technology policy in Korea has been related to industrial development so far. In the policy means, input element has been increased focusing on the external aspects. Bureaucratic policy culture has dominated other cultures including economic culture, academic culture, and civic culture.