자율운항선박 육상제어를 위한 비상상황 시나리오 개발에 관한 연구

정우리(Woo-Lee Jeong),임정빈(Jung-Bin Yim) 한국항해항만학회 2020 한국항해항만학회 학술대회논문집 Vol.2020 No.춘계

자율운항선박의 등장으로 인한 해양사고 예방을 위해서는 자율운항선박 비상상황에 대한 정립과 육상원격제어 업무 프로세스의 수립, 이를 기반으로 한 비상상황 시나리오 개발을 통해 비상대응체계를 구축할 필요가 있다. It is necessary to establish an emergency response system by redefining an emergency situation for MASS, configuring a process for shore remote control, and developing an emergency scenario based on it, in order to prevent maritime accidents caused by the emergence of MASS.

해양·수산 분야의 자원봉사 활성화를 위한 연구 - 대학생 자원봉사의 정책적 시사점을 중심으로 -

정우리,김향은,김세원,Jeong, Woo-Lee,Kim, Hyang-Eun,Kim, Se-Won The Korean Society of Marine Environment and safet 2016 해양환경안전학회지 Vol.22 No.2

본 연구에서는 해양 수산분야의 대학생 자원봉사활동에 대한 자료를 수집하여 활동유형을 유류방제작업, 어촌봉사활동, 해안정화작업 등으로 분석하였다. 또한 자원봉사 참여자 대부분은 환경보호, 보람, 사회교류, 특별체험, 자연과의 동화측면에서 만족하고 있었다. 주제측면에서 체계성, 효율성, 활동의 다양성, 자원홍보활용, 봉사이후 보상, 자기봉사역량 측면에서 불만족스러워 한다. 이러한 연구 결과를 바탕으로 대학생 자원봉사의 정책적 측면에서 해양 수산분야의 자원봉사를 증진시킬 수 있는 방안을 제안하였다. This study collected data of college students' volunteering for maritime and fisheries and found that only few subjects participated in it. They took part in control for release of oil, services for sea village and coastal cleansing. Most were satisfied with their volunteering referring contributing to environment protection, self-fulfillment, social interaction, gaining special experiences and assimilation with nature. The subjects were not satisfied with lack of systematic and effective services, monolithic activities, insufficient publicity, deficient rewards and a shortage of self-capacity. Based upon the research findings, implications for college students' volunteering policies were suggested to promote volunteering for maritime and fisheries.

상관필터 기반 객체추적에서 필터 학습영역 설정을 통한 추적성능 개선 방법

정우진(Woo Jin Jeong),정대연(Dae Yeon Jeong),탁명환(Myung Hwan Tak),이성룡(Sung Ryong Lee),주영훈(Young Hoon Joo) 대한전기학회 2022 대한전기학회 학술대회 논문집 Vol.2022 No.7

통상적인 치료에 충분히 반응하지 않는 심한 급성 두드러기 환자에서 저용량 에피네프린의 지속적 정맥 내 투여 치료의 효과와 안전성에 대한 연구

정우석 ( Woo Seok Jeong ),황보현 ( Hyun Hwangbo ),이숙경 ( Sook Kyung Lee ) 대한피부과학회 2018 대한피부과학회지 Vol.56 No.4

Background: Acute urticaria sometimes accompanies severe systemic reactions that can be potentially life-threatening. Some patients do not achieve sufficient responses to conventional treatments. There has been no previous study on the effect of continuous intravenous infusion of epinephrine in patients with severe acute urticaria. Objective: This study investigated the efficacy and safety of continuous intravenous infusion of low-dose epinephrine in patients with severe acute urticaria who did not achieve a sufficient response to conventional treatments. Methods: We retrospectively reviewed the medical records of 74 patients with severe acute urticaria who were treated with continuous intravenous infusion of low-dose epinephrine between November 2008 and December 2016. One milligram (1 mL) of 1:1000 epinephrine was diluted in 1 L of saline to yield a concentration of 1 μg/mL. The solution was infused at 0.67 μg/min (40 mL/h). Vital signs were checked at 0, 30, 60, and 90 minutes after infusion of epinephrine. Epinephrine was discontinued after one symptom-free day. Results: Clinical symptoms initially resolved within 24.8 hours on average and symptoms were completely resolved within 73.4 hours on average. Twenty-four adverse events, including palpitation, chest discomfort, hand tremor, increased blood pressure, and elevated cardiac markers, were observed in 19 patients (25.7%). Most adverse events were mild and regressed spontaneously without further management. Four patients (5.4%) stopped the infusion due to adverse events, but all events regressed spontaneously after stopping epinephrine. Six weeks after completion of intravenous infusion of epinephrine, 68 patients (91.9%) were symptom-free and six patients required antihistamines. Conclusion: This study suggests that continuous intravenous infusion of low-dose epinephrine is a safe and effective treatment in patients with severe acute urticaria who do not achieve a sufficient response to conventional treatments. (Korean J Dermatol 2018;56(4):242∼250)

1/4 선택 필터를 이용한 번짐 영상의 외곽선 복원

정우진(Woo-Jin Jeong),이종민(Jong-Min Lee),김재영(Chaeyoung Kim),문영식(Young-Shik Moon) 한국컴퓨터정보학회 2015 韓國컴퓨터情報學會論文誌 Vol.20 No.1

본 논문에서는 번짐 영상의 외곽선 복원을 위한 1/4 선택 필터를 제안한다. 일반적인 열화 제거 방법들은 연산량이 많아 수행시간이 오래 걸리는 단점을 가지고 있다. 따라서 속도 향상을 위해서 1/4 선택 필터를 새롭게 제안하고, 1/4 선택 필터를 이용한 번짐 영상의 외곽선 복원 방법을 제안한다. 1/4 선택 필터는 영상의 외곽선을 복원하는 기능이 있으나 세밀한 부분을 잃어버리는 단점이 있다. 이를 보완하기 위하여 영상의 주요 외곽선은 1/4 선택 필터로 복원하고 영상의 세밀한 정보는 DOG(Difference of Gaussian) 필터를 이용하여 복원하는 번짐 현상 제거 방법을 제안한다. 실험 결과를 통해 제안하는 방법이 번짐 영상에서 외곽선을 빠르고 효과적으로 복원함을 확인하였다. In this paper, we propose a deblurring method using 1/4 selective filter. Deblurring methods require a lot of processing time for deblurring. In order to enhance execution speed, we propose a novel 1/4 selective filter. The proposed 1/4 selective filter restores major edge, but it distorts minor edge and texture. To solve this problem, we apply 1/4 selective filter to restore major edge and DOG(Difference of Gaussian) filter to restore minor edge and texture. Experimental results show that the proposed method removes the blur effectively.

방통융합 공공서비스 플랫폼 구축사업의 경제적 파급효과 분석

정우수(Woo-Soo Jeong),이승택(Seung-Taek Lee) 한국통신학회 2009 韓國通信學會論文誌 Vol.34 No.4

본 논문은 정부의 방통융합 공공서비스 플랫폼 구축사업의 경제적 파급효과 분석을 목적으로 한다. 경제적 파급효과 분석을 위하여 방통융합 산업 분류체계를 재분류한 후 한국은행에서 발행하는 2003년 산업연관표를 RAS기법을 이용하여 2009년 산업연관표를 재작성하였다. 그리고, 방통융합 공공서비스 플랫폼 구축에 따른 경제적 파급효과를 분석하였다. 연구결과 방통융합 공공서비스 플랫폼 구축사업의 경제적 파급효과로 나타나는 총생산유발효과는 2009~2014년까지 약 3조 3,251억원, 부가가치 유발효과는 2조 9,760억원, 고용유발효과는 약 13,806명의 고용창출이 나타나는 것으로 추정되었다. 방통융합 공공서비스 플랫폼 구축사업은 향후 국민의 생활개선 향상에 크게 기여할 것으로 기대되며, 본 연구는 사업을 추진하기 위한 기초자료로서 가치가 있을 것이다. This paper is to analyze the economic effects of the broadcasting & communications convergence public service platform build-up. For the economic effect analysis, we reclassified the Broadcasting & Communications Convergence Industry Classification System and re-drew up 2009 Inter-industry Relations Table by using the 2003 Inter-industry Relations Table issued by the Bank of Korea and the RAS techniques. And we analyzed the economic effects that can be drawn from the broadcasting & communications convergence public service platform establishment. As a result, the gross production inductive effect which appears with the economic effect of the broadcasting & communications convergence public service platform establishment project from 2009 to 2014 came out to be about 3trillion 325.1 billion KW, added value inductive effect of 2trillion 976.5billion KW and the employment inductive effect of the job creation of about 13,806 people. Afterward, it is anticipated that the broadcasting & communications convergence public service platform build-up project to contribute to the improvement of Koreans' daily life. Moreover, this research will be used as a valued basic material in the pursuit of the future broadcasting & communications convergence projects.

대장내시경 시행 전 맑은 유동식이 시행 여부에 따른 대장정결도 비교

정우신 ( Woo Shin Jeong ),박동일 ( Dong Il Park ),석효선 ( Hyo Sun Seok ),김성은 ( Seong Eun Kim ),이석호 ( Suck Ho Lee ),이창균 ( Chang Kyun Lee ),은창수 ( Chang Soo Eun ),한동수 ( Dong Soo Han ) 대한장연구학회 2012 Intestinal Research Vol.10 No.3

Background/Aims: Adequate bowel preparation is essential for full visualization of colonic mucosa because detection of small polyps and neoplasms depends on the quality of bowel cleansing. The aims of this study were to compare the efficacy, tolerability of preparation and side effect between two groups: clear-liquid diet with polyethylene glycol (PEG) solution versus no diet restriction with PEG solution. Methods: This was a randomized single-blind prospective study. A total of 330 patients were randomly assigned to receive either 2 L PEG solution with a clear-liquid diet on the day before colonoscopy and another 2 L PEG solution on the day of the procedure (group 1) or 2 L PEG solution with a general diet on the day before colonoscopy and another 2 L PEG solution on the day of the procedure (group 2). Results: 162 patients were assigned to group 1 and 168 patients to group 2. The satisfactory quality of bowel preparation was not significantly different between the two groups (80.2%, 78.6%, P=0.707). Patient`s compliance of the clear-liquid diet in group 1 was 50%. The satisfactory quality of bowel preparation was weakly better when the clear-liquid diet was given 2 or 3 times a day (group 1A) than 0 or once a day (group 1B) (74.1%, 86.4%, P=0.048). The tolerability of the PEG solution and side effects of preparation were not significantly different in the two groups (P=0.573, 0.686). Conclusions: Bowel preparation with no diet restriction and split-dose PEG solution was similar to preparation with a clear-liquid diet in efficacy, tolerability and side effect. Therefore, the use of the clear-liquid diet protocol should improve patient`s compliance. (Intest Res 2012;10:272-279)

C 함량이 다른 A487 주강품의 열처리 조건에 따른 기계적 및 부식 특성

정우진 ( Woo Jin Jung ),정대호 ( Dae Ho Jeong ),이영철 ( Young Cheol Lee ),이재현 ( Jae Hyun Lee ),김상식 ( Sang Shik Kim ) 한국주조공학회 2015 한국주조공학회지 Vol.35 No.4

The effects of quenching and tempering temperatures on the tensile, impact and corrosion properties of A487 alloy cast with different C contents of 0.16, 0.19 to 0.23 wt.% were examined. The impact tests were conducted at 25℃ and -60℃ and the immersion test was performed using 3.5% NaCl solution for 14 days. The quenching temperature affected the mechanical properties of A487 alloy cast, while the magnitude of change varied depending on the C content. The increase in tempering temperature showed the typical trend of decreasing tensile strength and increasing impact properties. The change in quenching and tempering temperature in this study did not affect the corrosion properties of A487 alloy significantly. The change in mechanical and corrosion properties of A487 with different C contents was discussed based on the microstructural and fractographic observation.

5G 네트워크를 활용한 홈쇼핑 모바일 생방송 제작

정우진(Jung Woo Jin),최재형(Choi Jae Hyoung),이용주(Lee Yong Joo),정진욱(Jeong Jin Uk),김현우(Kim Hyeon Woo),송홍엽(Song Hong Yeop) 한국통신학회 2020 한국통신학회 학술대회논문집 Vol.2020 No.2

도시지역을 관통하는 홍수파의 특성에 관한 수치적 연구 (1) : 수치모형의 개발 및 검증

정우창,이진우,조용식,Jeong,Woo-Chang,Lee,Jin-Woo,Cho,Yong-Sik 한국방재학회 2009 한국방재학회논문집 Vol.9 No.6

본 연구에서는 도시지역을 관통하는 댐 붕괴파의 전파특성을 모의하고 분석하기 위한 선행 작업으로 천수방정식과 well-balanced HLLC 기법에 근간을 둔 2차원 비구조적 유한체적모형을 개발하였다. 개발된 모형은 다양한 1차원과 2차원의 댐 붕괴파 해석과 관련된 문제에 대해 검증되었으며, 검증결과 해석해 및 수리모형실험을 통한 실측자료와 매우 일치하는 경향을 나타냈다. 본 연구에서 개발된 수치모형은 현장에서 그리고 수리모형실험을 통해 관측된 수위자료와 잘 일치하였으며, 기존의 모형으로부터 계산된 수위결과에 비해 비교적 보다 정확한 결과를 나타내었다. In this study, a two-dimensional unstructured finite volume model based on the shallow-water equations and well-balanced HLLC scheme is developed. The model is verified by applying to various one- and two-dimensional problems related to the analyses of dam-break wave. The predicted numerical results agree very well with available analytical solutions and laboratory measurements. The model provides slightly more accurate results compared with the existing models.