푸아송 분포를 이용한 해상교통관제 구역 내 선박 상호간 교통위험 상황의 발생 간격 분석에 관한 연구

박상원,박영수,Park, Sang-Won,Park, Young-Soo 해양환경안전학회 2016 해양환경안전학회지 Vol.22 No.5

항만 및 연안의 관제구역 내에서는 VHF를 이용하여 24시간 해상교통관제가 이루어지고 있다. 그러므로 VHF 교신을 분석하면 관제구역 내의 선박 움직임이나 관제사의 관제패턴을 확인할 수 있다. 따라서 본 연구에서는 VHF 교신분석으로 관제사가 관제구역 내 위험상황을 관제하는 간격을 도출하고 관제 가이드라인 및 위험한 상황을 사전에 대비할 수 있는 기초 자료로 제공하고자 한다. 이를 위하여 부산항을 대상으로 7일간 VHF 교신을 청취하고, VTS가 직간접적으로 관제한 선박에 대하여 Park 모델을 이용하여 위험도를 도출하였다. 이를 이용하여 단위시간당 일정 위험도 이상의 선박을 관제하는 빈도확률이 푸아송 분포를 따르고 있음을 확인하였고, 그 결과 VTS가 선박을 직접 관제에 개입할 경우는 3.50시간마다, 특히 주간시간대의 경우 2.85시간마다 관제하는 것으로 분석되었다. 그리고 3.84시간마다 일정 위험도 이상의 선박간의 교신이 있음을 확인하였다. Vessel traffic servies (VTS) control movements in ports and coastal areas 24 hours a day using VHF. Thus, we were able to check ship movements and the patterns followed by VTS officers in VTS areas using VHF communication analysis. This study is intended to identify control intervals for dangerous situations and provide VTS officers with basic data and guidelines to prevent these occurrences in advance. We listened to Busan port's VHF communication for seven days and obtained risk values using the Park model with reference to controlled ships. The probability of a dangerous situation arising under a controller's watch per unit of time was confirmed to follow a Poisson distribution. As a result, for each 3.50 hours that VTS directly controls an area, (and in daytime for each 2.85 hours) a ship communicates in a VTS area every 3.84 hours, and some of there communications exceed certain risk values in VTS areas.

우울증(憂鬱症)의 구치료(灸治療)에 관(關)한 문헌적(文獻的) 고찰(考察)

박상원,송춘호,Park Sang-Won,Song Choon-Ho 경락경혈학회 2002 Korean Journal of Acupuncture Vol.19 No.1

Objective : This study was undertaken to review the moxa treatment of melancholia. Method : We referred to records from ancient to modern. Results : The results of this study were obtained as follows ; 1. It reveals that the common symptoms of melancholia shows chronic weakness and coldness generally, and moxibustion is effective for making body warm. 2. It reveals that HT8(少府), LR1(大敦), PC7(大陵), ST36(足三里) are used much for the treatment of melancholia, and the common characters of the above points are freshing mind, refreshing chest, controlling digestive energy etc. 3. It reveals that pericardium meridian, liver meridian, heart meridian are used much in moxa treatment of melancholia. Conclusion : These results indicate that moxa treatment is effective to treatment of melancholia.

정부의 양극화 해소방안에 대하여 2

박상원,Park, Sang-Won 한국인삼전략화협의회 2006 인삼·약초 Vol.4 No.3

경추추간판탈출증과 경부통증에 대한 추나치료에 관한 해외연구동향분석 -Pubmed 검색중심으로-

박상원,변장훈,이종환,하인혁,이진호,Park, Sang-Won,Byun, Jang-Hun,Lee, Chong-Hwan,Ha, In-Hyuk,Lee, Jin-Ho 척추신경추나의학회 2013 척추신경추나의학회지 Vol.8 No.2

Objectives : The purpose of this study is to explore the trends of Chuna(manipulation) treatment on neck pain and cervical disc displacement. Methods : We set up the two searching strategies and investigated the latest clinical trials on Chuna(manipulation) therapy for Neck disorders and cervical disc herniation through PubMed search. The searched papers were analyzed and the year, journals, article types of literatures were examined. Of the articles, Randomized controlled trials(RCTs) are assessed by Jadad scale. Results : Studies on Chuna(manipulation) treatment to cervical disc herniation were very few. Articles on Chuna(manipulation) treatment to neck pain were relatively more than those of cervical disc herniation. The most frequently published journal was J Manipulative Physiol Ther. The main design of study was RCT. The limited quality assessment of RCT was conducted by Jadad scale and the average Jadad score was 1.73, which indicates low quality in terms of Jadad evaluation criteria. Conclusions : International trends of studies on Chuna therapy of cervical disease is increasingly reviewed. Although this review has several limitations, analyzing the latest trends of studies on Chuna(manipulation) treatment on neck pain and cervical disc displacement is necessary for further studies.

버터플라이 밸브 하류 유동의 안정화에 관한 연구

박상원,이상우,Park, Sang-Won,Lee, Sang-U 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.11

A flow stabilizer, which is made of a honeycomb and three different mesh screens, is located downstream of a butterfly-type valve, for the reduction of flow disturbances behind the valve. Mean flow and turbulence measurements as well as flow visualizations are conducted in the downstream region of the deepens the non-uniformity of the streamwise velocity component and turbulence. The mesh screens considerably reduce the turbulence and enhance the uniformity of mean velocities. The combination of the honeycomb and the three mesh screens results in an efficient reduction in the flow disturbances. In addition, the flow stabilizer proves to have a good performance in the suppression of turbulence at a short distance.

와송약침액(瓦松藥鍼液)이 신장세포(腎臟細胞)에서 H₂O₂에 의한 세포사망(細胞死亡) 및 DNA 손상(損傷)에 미치는 영향(影響)

박상원,송춘호,Park, Sang-Won,Song, Choon-Ho 대한침구의학회 2001 대한침구의학회지 Vol.17 No.4

Objectives : This study was performed to determine if Orostachys japonicus A. Berger aquacupuncture (OjB) provides the protective effect against the loss of celi viability and DNA damage induced by oxidant in renal proximal tubular cells. Methods : The cell viability was evaluated by a MTT reduction assay and DNA damage was estimated by measuring double stranded DNA breaks in opossum kidney (OK) cells, an established proximal tubular cell line. Lipid peroxidation was determined by measuring malondialdehyde (MDA), a product of lipid peroxidation. Results : $H_2O_2$ increased the loss of cell viability in a time-dependent manner, which were prevented by 0.1% OjB. The protective effect of OjB was dose-dependent over concentration range of 0.05-0.5%. $H_2O_2$ caused ATP depletion and DNA damage, which were prevented by OjB and the hydrogen peroxide scavenger catalase. The loss of cell viability by $H_2O_2$ was not affected by the antioxidant DPPD, but lipid peroxidation by the oxidant was completely inhibited by DPPD. Conclusions : These data suggest that $H_2O_2$-induced death results from a lipid peroxidation-independent mechanism and the protective effect of OjB is not associated with its antioxidant activity.

식각된 비 귀금속 합금과 법랑질간의 접착 인장강도에 대한 연구

박상원,양홍서,Park, Sang-Won,Yang, Hong-So 대한치과보철학회 1987 대한치과보철학회지 Vol.25 No.1

The purpose f this study was to evaluate the effect of resin film thickness on the tensile bond strength and to compare the tensile bond strengths of 4 differently treated metal surfaces. For the experiment, seventy metal specimens were cast with Verabond and divided into I, II, III, groups. The metal specimens in group I were electrolytically etched and cemented with Panavia under finger pressure. Cement film thickness was regulated with metal spacers. The metal specimens in Group II were treated by 4 methods, such as electrolytic etching method, salt-roughened method, EZ-oxisor method , chemical etching method and cemented with Panavia. In group III, electrolytically etched metal specimens were cemented with Hy-Bond. The etched surface of metal specimens and the cement film thickness were examined under the scanning electron microscope. Results were as follows; 1. The tensile bond strength showed no significant difference between $30{\mu}m,\;80{\mu}m,\;130{\mu}m$ film thicknessspecimens. 2. There was no significant difference in the tensile bond strength between the 4 differently treated metal specimens. 3. The tensile bond strength showed significant difference between Panavia and Hy-Bond. 4. Scanning electron microscope photograph revealed that tile interdendritic eutectic was removed in electrolytically etched metal surfaces hilt even dendritic arm was removed in Chemically etched metal surfaces. 5. The metal surfaces which were air-abraded with $50{\mu}m$ aluminum oxide showed roughness and small crack on scanning electron microscope photograph.

공기조화용 버터플라이 밸브 하류에서의 3차원 유동특성

박상원,이상우,Park, Sang-Won,Lee, Sang-Woo 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.2

Oil-film flow visualizations and three-dimensional flow measurements have been conducted in the downstream region of a butterfly-type valve used in air-conditioning systems, with the variation of a disk open angle. The flow visualizations in the flow symmetry plane show that there are a pair of counter-rotating separation/recirculation zones as wall as two jet-like near-wall flows. These flow disturbances are strongly depends on the disk open angle. Based on the flow visualization, a qualitative flow model is suggested in the near-field and downstream region of the valve disk. For a small disk open angle, the mean velocities and turbulent intensities have relatively small values in the near-field of the valve disk, but they do not show uniform distributions even in some downstream region. With an increment of the disk open angle, mean velocity variations and turbulent intensities are greatly increased in the immediate downstream region, but uniform distributions are quickly resumed as departing from the valve disk. The mass flow rate remains nearly constant for the disk open angles less than 30 degrees, meanwhile it strongly depends on the disk open angles between 45 and 75 degrees. The pressure loss is found to be about zero for the disk open angles less than 45 degrees, but is substantially increased for those larger than 75 degrees.

상수도와 동

박상원,Park, Sang-Won 한국상하수도협회 1989 水道 Vol.49 No.-

2006대한민국 발명특허대전 시상식 인사말씀

박상원,Park, Sang-Won 한국발명진흥회 2007 發明特許 Vol.32 No.1