콜로이드 양자점 합성의 다양한 연구 개발 동향

정재용,홍종팔,김영국,Jung, Jae-Yong,Hong, Jong-Pal,Kim, Young-Kuk 한국분말야금학회 2018 한국분말재료학회지 (KPMI) Vol.25 No.4

Over the last decade, the study of the synthesis of semiconductor colloidal quantum dots has progressed at a tremendous rate. Colloidal quantum dots, which possess unique spectral-luminescent characteristics, are of great interest in the development of novel materials and devices, which are promising for use in various fields. Several studies have been carried out on hot injection synthesis methods. However, these methods have been found to be unsuitable for large-capacity synthesis. Therefore, this review paper introduces synthesis methods other than the hot injection synthesis method, to synthesize quantum dots with excellent optical properties, through continuous synthesis and large capacity synthesis. In addition, examples of the application of synthesized colloid quantum dots in displays, solar cells, and bio industries are provided.

연안 선박교통관리제도의 도입에 따른 사고예방효과 추정에 관한 연구

정재용,이형기,박진수,Jong, Jae-Yong,Lee, Hyong-Ki,Park, Jin-Soo 한국항해항만학회 2001 한국항해항만학회지 Vol.25 No.2

이 연구는 항만교통정보센터의 시스템 확충 및 연안 선박교통관리제도의 도입에는 많은 비용이 소요되기 때문에 비용과 편익을 비교하여 타당성을 조사하고자 한다. 따라서 비용과 편익을 분석하는데 중요한 기초자료가 되는 사고예방효과를 추정하고자 한다. 추정의 방법은 거제해역에서 발생한 해양사고를 분석하여 원인요소를 도출한 후 이를 설문문항으로 구성하여 항만교통정보센터의 운영요원을 대상으로 설문을 실시한다. 연안 선박교통관리제도의 도입에 의한 사고예방효과는 충돌사고에서 55.572%, 좌초사고에서 51.667%로 추정되었다. 또한 인적요소와 환경요소에 의한 효과는 높지만 기술적 요소에 의한 효과는 미미한 것으로 분석되었다. The purpose of this paper is to determine the expected percentage of the 'VTS addressable' casualties that could be prevented with the installation of fourth level(Automatic Dependent Surveillance) of coastal VTS. In this study, it determines the VTS benefit by multiplying casualty rate reduction factors by the effect level of causal factors. The development of casualty rate reduction factors was based on the questionnaire survey, and the evaluation of effect levels was based on the causal analysis using functional block diagram. The results of this paper are compared With the results of worldwide literature related to the VTS effectiveness. One or more of the key variable inputs of this study, casualty rate reduction factors, may be somewhat uncertain and therefore subject to sensitivity analysis.

목포항의 해상교통시스템 설정에 관한 연구

정재용,김철승,박성현,Jong Jae-Yong,Kim Chol-Seong,Park Sung-Hyeon 해양환경안전학회 2005 해양환경안전학회지 Vol.11 No.2

In the present maritime traffic conditions of Mokpo harbor, there exist many hazardous factors which may lead to huge accidents including marine oil pollution We analyze marine traffic environments including traffic congestion, natural conditions, maritime traffic accidents in the last 10 years, the fishery status, operation of traffic routes and management of navigational aids and regulations relating ships' routeing both in and out of the country. Consequently, this work is to propose improved marine traffic system in future.

여수해만 특정해역의 해상교통시스템 설정에 관한 연구

정재용(Jae-Yong Jong),김철승(Chol-Seong Kim),정중식(Jung-Sik Jeong) 한국항해항만학회 2005 한국항해항만학회지 Vol.29 No.8

여수해만의 교통안전특정해역은 1988년에 설정된 이후 선박 입항 척수 및 톤수가 크게 변하는 등 해상교통환경이 급격하게 변화된 것에도 불구하고, 통항분리가 되지 않은 채 흘수제약선의 깊은수심항로만 지정되어 있고 흘수제약선 이외의 통항선박들에 대한 항로체계는 미비한 실정이다, 또한 여수해만 입구의 A, B, C, W 묘박지에서 항로로 진입하는 선박과 조업어선 등의 무질서한 운항으로 통항선박의 안전에 지장을 초래하고 있는 실정이다. 본 연구에서는 여수해만 특정해역에 대하여 장래의 교통여건까지 고려하여 도출된 문제점에 대한 개선방안을 강구하는 등 해양사고 예방을 위한 종합적인 해상교통체제 설정에 목적이 있다. There has been only a deep water route for deep draft vessels without any other routeing system in Yosu Bay despite of the rapid change in ship’s size and increase in the traffic volume since the specified area for traffic safety was established in 1988. In this work, we suggest several solutions to secure ship’s safety and to eliminate dangerous factors which exists in present ship traffic system Consequently, this work is to propose improved marine traffic system in future.

해양사고 조사ㆍ심판제도의 비교연구

정재용(Jae-Yong Jong),나송진(Song-Jin Na) 한국항해항만학회 2003 한국항해항만학회지 Vol.27 No.2

이 연구는 우리나라 및 영국ㆍ미국ㆍ일본ㆍ네델란드의 해양사고에 관한 조사ㆍ심판제도를 다루며, 우리나라의 조사ㆍ심판제도를 주요 해운국가의 제도와 비교ㆍ분석하여 우리 제도의 미비점을 도출하고 다음과 같은 개선방안을 제안한다. (1) 해양안전심판원의 소속, 예산, 인사 및 청사를 독립시켜 단독기관으로 한다. (2) 해양안전심판원의 조사기능과 심판기능을 독립된 조사기관으로 이원화한다. (3) 사고원인을 규명한 결과를 행정기관 등에 권고를 할 수 있는 권한을 가지도록 한다. (4) 조사관 및 심판관을 다양한 전공의 전문가로 구성한다. (5) 조사시 사법기관과의 상호 협력체제를 구축한다. (6) 국제협력업무를 담당하는 전문부서와 인력을 갖춘다. This study describes and discusses the marine accidents investigation & inquiry system of Korea, U.K., U.S.A., the Netherlands and Japan. As the results of the comparison of them, the following recommendations are made with respect to improve the system in Korea (1) The Agency should be independent from the central Government with respect to the budget, personnel management and a agency building. (2) The inspection function and judgment function should be divided into separate Agency. (3) The Agency shoula has a recommendation right to Government agency according to the results of investigation. (4) The composition of inspectors & judges must be diversified including navigation, marine engineering and naval architecture background (5) The Agency should have co-operative system with the Marine Police Agency. (6) International affairs division should be included in the Agency to promote international relations.

SVR4.0의 Real - Time 기능 고찰 및 분석

정재용(Jae Yong Jeong),이종우(Jong Woo Lee),조유근(Yoo Kun Cho) 한국정보과학회 1993 한국정보과학회 학술발표논문집 Vol.20 No.1

AT&T Bell Lab에서 개발된 UNIX 운영체제는 높은 유연성과 이식성으로 인해 운영체제의 표준으로 받아들여지고 있다. 그러나 UNIX는 원래 다중 프로세스의 시분할 수행을 기본으로 하고 있기 때문에 실시간 처리를 요하는 응용 프로그램들을 위해서는 적절한 응답 시간을 지원하지 못하는 것이 일반적이었다. SVR4.0에서는 급증하는 실시간 응용들의 요구사항을 만족시키기 위해 실시간 처리 기능을 첨가하였는데 본 논문에서는 실시간 운영체제가 갖추어야 할 요구사항중 스케쥴러가 갖추어야 될 것들을 제시하고 SVR4.0 시스템의 실시간 프로세스 스케쥴링 기능이 이에 얼마나 부합하는지를 분석한다. 아울러 SVR4.0의 실시간 프로세스 스케쥴링 방식의 문제점도 제시하고자 한다.

탐측자 심첨부 회전법에 의한 좌심방이 관찰에 대한 연구

정재용(Jae Yong Chung),장경식(Kyoung Sig Chang),류보열(Bo Yeol Ryu),모성환(Sung Whan Mo),김태종(Tae Jong Kim),문철호(Chel Ho Moon),진영기(Young Kei Chin),박유환(Yoo Whan Park),이승일(Seung Il Lee),홍순표(Soon Pyo Hong) 대한내과학회 1997 대한내과학회지 Vol.52 No.6

Objectives: Visualization of the left atrial appendage(LAA) by the transesophageal echocardiography(TEE) is excellent, but it is difficult to visualize the LAA by the modified parasternal short-axis view(MPSA) in transthoracic echocardiography(TTE). We studied to determine the usefulness of the apical horizontal view(AHV) abtained by the apical rotation method of the transducer for the detection of the LAA. Methods: We studied the MPSA and AHV in 602 patients, The LAA was observed during diastole of the LAA. We obtained an apical horizontal view by 45 degree clockwise rotation of the transducer from the apical 2 chamber view and compared with the visualization of the LAA in AHV and MPSA. Results: Among 602 patients, LAA could not be visualized in 88(14.6%) because of a poor echo-window. LAA was more clearly visualized in 222 patients by the AHV than the MPSA and 56 patients by the MPSA than the AHV. LAA was same degree visualization in patients by the AHV and MPSA. In male and female, more than 55 ages and less than 55 ages, visualization of inner margin of the LAA by the AHV was more clear than by the MPSA. Conclusion: The AHV was a useful, noninvasive and reproducible method for the visualization of the LAA.

직전항로에서의 적정 최대속력에 대한 검토.연구

박영수,정재용,박진수,Park Young-Soo,Jong Jae-Yong,Park Jin-Soo 해양환경안전학회 2006 해양환경안전학회지 Vol.12 No.2

Recently, ships' average navigation speed become faster than before because of the increasing of high-speeds vessel including container ships and passenger-ferries. So, it is considered that the speed limit in the navigation channel in Korea isn't proper for vessel management in these days. Also, there is rare paper studies about the speed limit quantitatively and numerically, especially the speed limit is discussing continuously, as abrogation of Incheon Port's speed limit and alleviation of Gwang-yang Port's speed limit according to the requests by the navigating mariners. Consequently this paper deals with the effectiveness of speed limits using the Environmental Stress Model, after replay of the navigation traffic flow in the straight waterway using marine traffic flow simulation technique.

SPM 이안 선박의 조종영역에 관한 기초 연구

김진수,정재용,김경태,Kim Jin-Soo,Jong Jae-Yong,Kim Kyung-Tae 해양환경안전학회 2005 해양환경안전학회지 Vol.11 No.2

The work of VLCC SPM mainly is accomplished on the open sea. On the open sea as a result of meteorological condition and the ocean wave influence, When the weather condition is get bed, peremptorily moving to the safety place, bemuse of the gale and the billow, almost happened frequently, the pilot is unable to go on board and the tug is also unable to be used Now bemuse of the bad weather the VLCC SPM moving to the other safety place frequently happened in the ulsan port. the construction of new harbor, it constructed many break water around SPM. So that it is necessary to propose the new standard about how to maneuvering area actually. Now our country is at the blank stage about the establishment of SPM research Most of the situations refer to overseas standards. But these standards lack consistency and clarity. So when moving to the another safe place from SPM, we must Carry through the research and study on the ships using sailing through AIS Data We must put forward a new standard about maneuvering area of ships moving at SPM.

전자태그의 기술동향과 해양정보시스템에의 활용방안에 관한 연구

정중식,정재용,Jeong, Jung-Sik,Jong, Jae-Yong 해양환경안전학회 2005 해양환경안전학회지 Vol.11 No.1

Recently, RFID technology play a key role to implement ubiquitous sensor network(USN). In this paper, we introduce trends of RFID technology, standardization, and then its applications. The purpose of this work is to suggest prosperous applications of RFID, which is applicable on marine information system, such as ship inventory management, management of container and its contents, sensing of environments within cargo hold, management of fishery boats. In case that RFID technology is utilized on marine information systems, it makes safety at sea and marine environments protection.