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권용준,변정환,Kwon, Yong Jun,Byeon, Junghwan 한국안전학회 2020 한국안전학회지 Vol.35 No.2
In Article 311 of the Regulation on Occupational Safety and Health Standards requires the use of Korean Industrial Standards Act in accordance with the Industrial Standardization Act. However, the classification, inspection, maintenance, design, selection, and installation of explosion hazard locations for explosion and explosion prevention and internalization of 'safety' in the performance maintenance phase of electrical machinery and equipment There is no technical and institutional management plan for remodeling and alteration. Analysis of actual conditions and problems related to the installation, use, and maintenance of explosion-proof equipment, comparative analysis of domestic and international technical standards and systems, technical, institutional and administrative systems and systems related to installation, use, and maintenance of explosion-proof equipment, technical personnel and qualifications, etc. It is to propose legislation, system improvement, and technical standard establishment related to the maintenance of explosion-proof facility performance through improvement of the necessity and feasibility study for establishment of the legal status of the management site and management plan. As technical measures, KS standard revision (draft), KOSHA guide (draft) and explosion-proof facility performance maintenance manual were presented. In addition, the institutional management plan proposed the revised rule on occupational safety and health standards, the revised rule on the restriction of employment of hazardous work, and the manpower training program related to the maintenance of explosion-proof facilities and the qualification plan. Enhance safety at the installation, use, and maintenance stage of explosion-proof structured electrical machinery. It is expected to be used to classify explosion hazards, select related equipment, and to update and standardize standards related to installation, use and maintenance.
지연 허용 센서 네트워크에서 이동 방향을 고려한 효과적인 메시지 전달 프로토콜
권용준(Yong Jun Kwon),김대성(Dae Sung Kim),정윤원(Yun Won Chung) 한국정보기술학회 2012 한국정보기술학회논문지 Vol.10 No.11
Spray & Wait protocol is one of the representative delay tolerant network protocols and consists of Spray phase and Wait phase. In the Spray phase, message copies are delivered to neighbor nodes. On the other hand, message copies are delivered to the destination node only in the Wait phase. The performance of Spray & Wait protocol depends on the way of distributing message copies to neighbor nodes. In this paper, we propose an efficient message delivery protocol where utility of a node is obtained using movement speed, remaining energy, and movement direction index towards a destination node and message copies are delivered to the node with higher utility in delay tolerant sensor network where replacement of battery of a node is not easy and the location of a destination node is fixed. Simulation result shows that the proposed protocol has better delivery probability of about maximum 5% than previous protocols and the delivery probability increases as the weight of movement direction index increases. It was also shown that the proposed protocol has similar overhead ratio compared with previous protocols.
권용준 ( Yong-jun Kwon ),김남석 ( Nam-seok Kim ),이종훈 ( Jong-hoon Lee ),임수민 ( Soo-min Im ),고석주 ( Seok-ju Ko ) 한국정보처리학회 2021 한국정보처리학회 학술대회논문집 Vol.28 No.2
2020년 전자서명법 개정으로 공인인증서가 폐지됨에 따라 자체 인증 기술의 도입이 필요한 실정이다. 특히나 COVID-19로 인한 비대면 상황이 지속됨에 따라 기존 아날로그 방식을 통해 대면으로 계약서를 작성하고 수립하는데 많은 비효율적 문제가 대두되었다. 디지털 전환 가속화와 비대면 거래 확대로 인한 전자 신원확인 중요성이 점차 커지고 있음에 따라 전자 서명 및 전자 봉투 방식으로 계약할 수 있는 안전한 시스템 개발을 진행하고자 한다. 이를 위해 계약 시스템의 보안 요구 사항을 도출하였으며 최종적으로 NFT 연동을 통해 안전한 계약을 진행할 수 있도록 프로세스를 설계하였다. 시스템의 동작 방식을 표현하기 위하여 DFD 등을 포함한 Diagram 형태로 나타내었으며 실제 프로토타입을 제작 후 블록체인 네트워크에 연결한 뒤 테스트를 진행하여 시스템 검증을 수행하였다. 추후 이 시스템을 통해 B2B, B2C 모델 등의 모델 기반 다양한 거래와 계약이 가능하도록 구성할 예정이며 추가적인 연구를 진행하여 사용자 측면에서 더 간편하고 안전한 환경이 될 수 있도록 고도화 시키는 것을 목표로 한다.
권용준(Yong-Jun KWON),박해미(Hae-Mee PARK) 한국상담심리교육복지학회 2022 상담심리교육복지 Vol.9 No.6
본 연구는 원격수업에 대한 전문대학교 교원들의 인식을 조사하는 데 그 목적이 있다. 이를 위해서 전문대학에 소속된 총 737명의 전임교원들이 본 조사에 참여하였고, 원격수업에 관한 21개의 문항으로 구성된 질문지를 실시하였다. 수집된 자료의 분석은 SPSS 통계프로그램을 사용하였고, IPA기법을 활용하여 교수역량과 대학지원에 관한 요인들을 탐색하였다. 본 연구의 주요결과는 다음과같다. 첫째, 원격수업의 효과성에 대해서 교원들의 62.3%는 부정적으로 인식하였다. 둘째, 원격수업에 대한 개인차원의 교수역량에 대한 중요도와 현재 수준은 일치하지 않았고, 대학차원의 교수지원에서도 동일한 결과가 나타났다. 셋째, 원격수업의 효과성을 높이기 위해서는 개인차원에서 교원의교수설계 능력을 함양하고, 대학차원에서 교수학습자료 제작․공유 플랫폼 제공 등이 필요한 것으로나타났다. 이러한 본 연구결과를 바탕으로 원격수업에 관련하여 주요 시사점 및 후속연구를 제안하였다. The purpose of this study was to investigate professors’ perceptions on distance learningwhich was provided to students. In order to examine the practices of distance learning in atotal of 737 college professors participated in the study. A questionnaire, comprised of 21 itemsseeking professors’ perceptions was used. Analysis of the collected data was usedImportance-Performance Analysis(IPA) with SPSS. The results of the study are as follows. First,62.3% of professors reported negative perceptions of distance learning. Second, there was theimportance and current level of teaching competencies related to distance learning did notmatch, and the same results were college supports. Third, to improve the effectiveness for thedistance learning, the college provide a platform for producing and sharing teaching andlearning materials, the professors have to development the ability to instructional design. Basedon the results of the study, implications were discussed, and further studies were suggested.
용융드래그방법을 이용한 마그네슘 합금 박판의 제조조건 확립
한창석,권용준,Han, Chang-Suk,Kwon, Yong-Jun 한국재료학회 2021 한국재료학회지 Vol.31 No.9
An investigation is performed to clarify the manufacturing conditions of pure magnesium and AZ31 magnesium alloy thin plate using the melt drag method. By the melt drag method, suitable for magnesium molten metal, pure magnesium can be produced as a continuous thin plate with a thickness of 1.4 mm to 2.4 mm in the range of 5 m/min to 20 m/min of roll speed, and the width of the thin plate to the nozzle outlet width. AZ31 magnesium alloy is able to produce a continuous sheet of thickness in the range of 5 m/min to 30 m/min in roll circumferential speed, with a thickness of 0.6 mm to 1.6 mm and a width of the sheet matching the nozzle outlet width. In the magnesium melt drag method, the faster the circumferential speed of the roll, the shorter the contact time between the molten metal and the roll, and it is found that the thickness of the produced thin plate becomes thinner. The effect of the circumferential roll speed on the thickness of the thin plate is evident in the low roll circumferential region, where the circumferential speed is 30 m/min or less. The AZ31 thin plate manufactured by the melt drag method has a finer grain size as the thickness of the thin plate decreases, but it is currently judged that this is not the effect of cooling by the roll.
성형벨트를 부착시킨 장비를 이용하여 용융드래그방법으로 제작한 마그네슘 합금의 제작조건 확립
한창석,권용준,Han, Chang-Suk,Kwon, Yong-Jun 한국재료학회 2021 한국재료학회지 Vol.31 No.10
To improve the shortcomings and expand the advantages of the single-roll melt drag method, which is a type of continuous strip casting method, the melt drag method with a molding belt is applied to AZ31 magnesium alloy. By attaching the forming belt to the melt drag method, the cooling condition of the thin plate is improved, making it possible to manufacture thin plates even at high roll speed of 100 m/min or more. In addition, it is very effective for continuous production of thin plates to suppress oxidation of the molten metal on the roll contact surface by selecting the protective gas. As a result of investigating the relationship between the contact time between the molten metal and the roll and the thickness of the sheet, it is possible to estimate the thickness of the sheet from the experimental conditions. The relationship between the thin plate thickness and the grain size is one in which the thinner the thin plate is, the faster the cooling rate of the thin plate is, resulting in finer grain size. The contact state between the molten metal and the roll greatly affects the grain size, and the minimum average grain size is 72 ㎛. The thin plate produced using this experimental equipment can be rolled, and the rolled sample has no large cracks. The tensile test results show a tensile strength of 303 MPa.