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朴漢奎,宋宇永 연세대학교 대학원 1981 延世論叢 Vol.18 No.1
In this paper, a MIC beam steering antenna is designed by using the microstrip substrate whose dielectric constant is 2.45 and height is 0.10875cm. In order to match the impedance of the antenna with free space, dimensions of the antenna are determined from the C.A.D. and Hammerstad formulae are used for calculating the width of microstrip and the rat-race hybrid ring phase shifter is used for the phase shift between antennas. From this experiment, the antenna has ±200MHz bandwidth with the center frequency of 10.5GHz. The main beam of the antenna could be steeled by about 30 degrees by taking the distance of antenna 1 and 2 by □λ and the phase shift between them by zero and □λ radians. These experimental results were in good agreement with the theoretical values.
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케미컬 탱커 직무교육의 만족도 연구: 케미컬 탱커 승무 경력 중심으로
박한규,하민재 해양환경안전학회 2024 해양환경안전학회지 Vol.30 No.6
선박직원법은 위험화물 취급에 대한 최소자격 요건을 규정하고 있다. 과거에는 케미컬 탱커 직무교육 이수를 위해 필수적으로 승무 경력이 요구되었으나, 2023년 동 법 개정 이후, 승무 경력이 없어도 교육 이수가 가능해졌다. 이에 따라 교육의 성과는 개정 전에 비해 낮아질 것이라 예상할 수 있다. 본 연구는 케미컬 탱커 직무교육에서 승무 경력 유무에 따른 교육 만족도 차이를 확인하였다. 그 결과, 이수 자격에서 승무 경력이 삭제된 이후 타 선종에서 케미컬 탱커로 이직자의 비율이 늘고, 승무 경력 유무에 따른 교육 만족도는 승무 경력자가 교육 운영, 교육설계, 교육효과, 강사 능력, 현업 적용 모든 측면에서 높은 만족도를 보였다. 특히 현업 적용에서 가장 큰 만족도 차이를 보이고 교육설계에서 가장 낮은 만족도 차이를 보여 주었다. 이에 대한 개선 방안으로 선상 직무교육의 인정, 시뮬레이터를 활용한 교육 방법 및 승무 경력자와 무경력자의 토의법을 제안한다. 본 연구는 케미컬 탱커 직무교육 과정에서 승무 경력의 유무가 교육효과에 미치는 실제 영향을 보여 주며, 향후 교육과정의 개선 시 기초자료로 활용될 것이다. The Ship Officers Act establishes minimum qualifications for handling dangerous cargo. Previously, onboard experience on chemical tankers was mandatory to complete advanced chemical tanker training. However, a legal amendment in 2023 now permits completion of the training without prior onboard experience, potentially diminishing the expected learning outcomes. This study examines variations in satisfaction with advanced chemical tanker training based on prior onboard experience of trainees. Results revealed that many trainees shifted from working on other types of vessels to chemical tankers after removing onboard experience from qualification requirements. Trainees with onboard experience reported higher satisfaction across multiple aspects, including educational management, educational design, educational effectiveness, the lecturer’s ability, and application to their work.. Notably, the most significant differences were observed in application to their work, with the smallest differences found in educational design. The study recommends recognizing onboard job training, using simulators, and incorporating discussion techniques that engage experienced and inexperienced trainees. These findings highlight the influence of onboard experiences on learning outcomes and serve as foundational data for improving future curricula.
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GaAs SBGFET를 利用한 超高周波 通過帶域 增幅器에 관한 硏究
朴漢奎 연세대학교 산업기술연구소 1977 논문집 Vol.7 No.1
. Microwave GaAs Schottky Barriers Gate Field Effect Transistor(SBGFET) with the gate-length of two micrometers are investigated. The scattering parameters of the transistor have been measured from 1GHz to 2 GHz by HP 8545 Automatic Network Analyzer from the measured data, an equivalent circuit is established which consists of an intrinsic and extrinsic transistor elements. In this paper, GaAs SBGFET Amplifier is used in conjunction with conventional microstrip techiques to match into a 50 ohms high input output impedances system. We found that power gain is less than 8 dB and VSWR is less than 1.5 in L-band.
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建築配置計劃의 適正設計에 關한 硏究 : 方形配置計劃을 中心으로 Focused on the Square Type of Building Arrangements
朴漢圭 전북대학교 공업기술연구소 1980 工學硏究 Vol.10 No.-
A proper exterior design of building contributes a great deal to the physical development of human environment in urban area. A square type of building arrangements is chiefly analysed in the study with 4 defined different points of view, climatic condition, audio-visual interference, spatial interrelationship and land-use pattern, and then a standard value, D/H=2.62, is formulated. (D=distance of interrelated building, H= height of building) Land-use pattern is also very attainable and applicable to the standard value of space orga-nisation in building complex
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2P-347 MALDI-based quantitative targeted metabolomics for 15d-deoxy-Δ12, 14PGJ2 (15d-PGJ2)
박한규,안다희,정윤이,송원석,김윤곤 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Prostaglandins (PGs) are lipid mediators that may play critical roles in cancer, immunomodulation, and neurodegeneration. So, the quantitative analysis of PGs will offer the significant information in order to understand the natural history of a range of diseases and may be used as a tool in the development of new biotherapeutics. Here, we developed a matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-MS)-based analytical method for rapid and easy quantification of the ketone-containing PGs as a targeted metabolomics.
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