항공영상에서 상대 위치 추정 알고리듬의 실시간 구현

박재홍,김관석,김인철,박래홍,이상욱,Park, Jae-Hong,Kim, Gwan-Seok,Kim, In-Cheol,Park, Rae-Hong,Lee, Sang-Uk 대한전자공학회 2002 電子工學會論文誌-SP (Signal processing) Vol.39 No.3

본 논문에서는 TMS320C80 멀티미디어 MVP(multimedia video processor)를 이용한 항법 변수 추출의 구현 기법에 관하여 연구하였다. 특히, 항법 변수 추출 시스템의 실시간 구현에 중요한 역할을 하는 상대 위치 추정 알고리듬의 실시간 구현 방법에 관하여 고찰한다. 두 지점에서 취득된 영상을 이용하는 상대위치 추정 알고리듬을 근간으로 하여, 방대한 양의 계산량을 감축하면서 고정 소수점 프로세서에 적합한 고속 알고리듬을 개발한다. 그런 다음, MVP 내의 4개의 병렬 프로세서(PP; parallel processor)를 이용하여 병렬 처리할 수 있도록 알고리듬을 재구성한다. 그 결과, MVP를 이용한 항법 변수 추출 시스템은 초당 30프레임을 처리할 수 있음을 확인하여, 실시간 구현 조건을 만족시킴을 알 수 있었다. This paper deals with an implementation of the navigation parameter extraction technique using the TMS320C80 multimedia video processor (MVP). Especially, this Paper focuses on the relative position estimation algorithm which plays an important role in real-time operation of the overall system. Based on the relative position estimation algorithm using the images obtained at two locations, we develop a fast algorithm that can reduce large amount of computation time and fit into fixed-point processors. Then, the algorithm is reconfigured for parallel processing using the 4 parallel processors in the MVP. As a result, we shall demonstrate that the navigation parameter extraction system employing the MVP can operate at full-frame rate, satisfying real-time requirement of the overall system.

생활체육지도자의 직무관련요인이 이직의사에 미치는 영향

박재홍(Park Jae-Hong),신문형(Shin Moon-Hyoung) 한국체육과학회 2000 한국체육과학회지 Vol.9 No.1

The purpose of this study was to examine the factors that influence voluntary tunovers among leaders who are employed in Leisure and sports. The factors were found to he external, job-related, and personal. A survey was administered to 218 leaders of the following organizations that studied at Yong-in University, to success a third class leader in Leisure and sports with man 151 persons and female 67. A questionaire was designed to establish the causal factors of Yang-Jin Hawn(1992), Park-Se Hong(1994), Jun-Chan yol(1994), Lee-Ki Hyo(1995) in leisure and sports. The questionnaire had a high index in the Cronbach' a = .7108 ~ .8911 test. These surveys were cpmpleted using self-administration method. First, to analyze the data for the study, the frepuencies, t-test, one-way ANOVA was sued to analyze the collected data. The results of this study were as follews: First, the external factors associated with voluntary turnovers had not a stronger impact on the sex, education, prestige, salary on the decision. Second, the joh-related factors associated with voluntary turnovers has net friedship satisvaction and productivity.

지역냉방 시스템용 초고효율 판형 열교환기 개발에 관한 연구

박재홍(Jae-Hong Park),임혁(Hyug-Lim),조성열(Sung-Youl Cho),강인성(In-Sung Kang),김정규(Jung-Kyu Kim),허인은(In-Eun Hur),고성규(Seong-Kyu Ko),곽승식(Sung-Sik Kwak),김종재(Jong-Jae Kim) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.10

Plate heat exchanger consists of thin, rectangular, pressed sheet metal plates that are sandwiched between full peripheral gaskets and clamped together in a frame. The frame has a fixed end-cover plate, fitted with the connecting ports, which is bolted together with a movable cover plate to hold the embossed plates in between; the top and bottom carrying bars allow proper alignment of the plate stacks. When compared with the well-established shell and tube heat exchangers, the plate heat exchanger shows a lot of advantages like high NTU values, compactness, low cost, multi duties and reduced fouling etc. Plate heat exchangers are often used to transfer heating or cooling water which is produced in the energy production( district heating or district cooling) facilities to residential areas and industrial parks. The district cooling systems of Middle East are the biggest market of plate heat exchanger, but the technical specifications for cooling system are different from the domestic one. To achieve its specifications, the new plate heat exchanger was developed, and its thermal performance results are introduced in this paper.

신체형 장애에서의 Testosterone과 통각 역치의 상관관계

박재홍,김명정,박제민,김용기,한귀원,박성화,윤경일,정영인,김성곤,Park, Jae-Hong,Kim, Myung-Jung,Park, Je-Min,Kim, Yong-Ki,Han, Kwi-Won,Park, Seong-Hwa,Yun, Kyung-Il,Chung, Young-In,Kim, Sung-Gon 한국정신신체의학회 1998 정신신체의학 Vol.6 No.1

DSM-IV 진단 기준에 의하여 신체화 장애, 미분화 신체형 장애, 그리고 달리 분류되지 않은 신체형 장애여성 환자 13명과 정상 여성 20명을 대상으로 압통에 대한 통각 역치와 혈청 testosterone을 측정하여 다음과 같은 결과를 얻었다. 1) 가변 하중 압통 예민도 측정기 (Variable Weight Pressure Algometer)로 측정한 통각 역치는 환자군이 153.8${\pm}$39.5gm/$0.05mm^2$로서 대조군의 197.5${\pm}$66.7gm/$0.05mm^2$보다 유의하게 낮았다(p<0.05). 2) 혈청 testosterone치는 환자군에서는 0.175${\pm}$0.081ng/ml였고, 대조군에서는 0.174${\pm}$0.108ng/ml로서 양군간에 유의한 차이가 없었다. 3) Testosterone과 통각 역치와의 상관관계를 보면, 환자군에서는 혈청 testosterone치와 통각 역치 사이에 유의한 정적 상관관계가 있었으나(r=0.632, p<0.05, two tailed, Pearson's correlation test), 대조군에서는 유의하지 않았다(r=-0.405). 이상의 결과로 보아 신체화 장애 환자와 정상인 사이에 통각 예민도 조절 기전이 서로 다를 수 있다고 사료 된다. Thirteen female patients of somatization disorder, undifferentiated somatoform disorder and somatoform disorder, NOS, diagnosed by DSM-IV were studied for their pain threshold and serum testosterone and the results were compared with the respective data of 20 control females. The results are as follows : 1) The pain threshold as measured by Variable Weight Pressure Algometer was significantly lower in the patient group(153.8${\pm}$39.5 gm/$0.05mm^2$) as compared to the control group(197.5${\pm}$66.7 gm/$0.05mm^2$)(p<0.05). 2) There was no significant difference of serum testosterone between the patient(0.175${\pm}$0.081 ng/ml) and the control(0.174${\pm}$0.108 ng/ml) groups. 3) A significant positive correlation was noted between the pain threshold and serum testosterone in the patient group(r=0.632, p<0.05, two tailed, Pearson's correlation test), but not in the normal control group(r= -0.405). From these results, it was suggested that the role of testosterone in endogenous pain control system might be more important in somatoform disorders than normals.

대규모 상수관망해석을 위한 확장기간모의 모형의 개발

박재홍,한건연,이을래,Park, Jae-Hong,Han, Geon-Yeon,Lee, Eul-Rae 한국수자원학회 2000 한국수자원학회논문집 Vol.33 No.1

만성 복통을 보이는 환자 어떤 순서로 접근을 해야 하나요?

박재홍,Park, Jae-Hong 대한소아소화기영양학회 2011 Pediatric gastroenterology, hepatology & nutrition Vol.14 No.1

Chronic abdominal pain (CAP) is a common complaint encountered in pediatric clinics and a great concern for patients and their caretakers as well as health care professionals. A constant challenge is detecting individuals with organic diseases or psychosomatic disorders from the majority of patients who have a functional disorder including functional dyspepsia, irritable bowel syndrome, functional abdominal pain, and abdominal migraine. Beginning with a detailed history and physical examination, physicians must determine a differential diagnosis of CAP by applying the symptom-based Rome III criteria to positively identify a functional disorder. These findings should then be further analyzed based on diagnostic clues and red flags that indicate the presence of specific organic diseases and/or the need for further testing. Once a functional diagnosis has been made or an organic disease is suspected, physicians can initiate an empiric therapeutic trial. Since psychological distress accompanies both organic and non-organic abdominal pain in children, a cooperative diagnostic approach involving pediatricians and psychiatrists is recommended.

만성 누소관염의 임상양상과 치료

박재홍,노주헌.Jae Hong Park. MD. Joo Heon Roh. MD 대한안과학회 2013 대한안과학회지 Vol.54 No.10

Purpose: To report on the clinical manifestations, species and treatments of patients with chronic canaliculitis. Methods: From August 2003 to February 2012, 77 eyes of 77 patients who were diagnosed with chronic canaliculitis at our hospital were retrospectively analyzed. Results: The mean period from the onset of symptoms to diagnosis was 4.7 months. The most common systemic disease associated with chronic canaliculitis was diabetes (18 eyes, 23%), and 13 eyes (17%) were related to punctual plug insertion. Main symptoms consisted of epiphora with discharge and pouting punctum. In the culture results of 55 eyes, streptococci, staphylococci, and actinomyces among other bacteria were identified. Seventy-two eyes (94%) were cured with one-snip punctoplasty with curettage. Conclusions: Chronic canaliculitis is rare, and the clinical aspect can be obscured by chronic conjunctivitis, thus the diagnosis is often delayed. In patients who have systemic diseases such as diabetes or past history of punctual plug insertion, chronic canaliculitis should be differentiated by observing the punctum more closely. If the diagnosis is accurate at the time, chronic canaliculitis could be easily cured by a relatively simple procedure such as one-snip punctoplasty with curettage.

W CMP 공정에서의 연마패드표면 안정화 상태와 그 개선

박재홍,키노시타 마사하루,요시다 코이치,신이치 마츠무라,정해도,Park, Jae-Hong,Kinoshita, Masaharu,Yoshida, Koichi,Matsumura, Shinichi,Jeong, Hae-Do 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.12

In this research, the polishing pad for W CMP has been analyzed to understand stabilization of polishing performance. For stabilization of process, the polishing pad condition is one of important factors. The polishing pad plays a key role in polishing process, because it contact with reacted surface of wafer[1]. The physical property of pad surface is ruled by conditioning tool which makes roughness and profile of pad surface. Pad surface affects on polishing performance such as RR(Removal Rate) and uniformity in CMP. The stabilized pad surface has stable roughness. And its surface has high level of wettability which can increase the probability of abrasive adhesion on pad. The result of this research is that the reduction of break-in and dummy polishing process were achieved by artificial machining to make stable pad surface. In this research, urethane polishing pad which is named IC pad(Nitta-Haas Inc.) and has micro pore structure, is studied. Because, this type of pad is the most conventional type.

일차 선별검사로서 자궁경부 세포진 검사의 유용성

박재홍,하승연,조현이,정동해,김나래,박상희,Park, Jae-Hong,Ha, Seung-Yeon,Cho, Hyun-Yee,Chung, Dong-Hae,Kim, Na-Rae,Park, Sang-Hui 대한세포병리학회 2008 대한세포병리학회지 Vol.19 No.2

We evaluated the usefulness of cervicovaginal cytology as a primary screening test by analyzing the cytologic and histological diagnoses of 2,254 women. Cervicovaginal cytology had 93.0% sensitivity, 86.1% specificity, 88.2% positive predictive value, and 91.7% of negative predictive value. Cervicovaginal cytology as a primary screening test showed much higher specificity but slightly lower sensitivity than HPV DNA testing. However, the sensitivity of cervicovaginal cytology will be improved continuously due to the development of liquid-based cytology. We regard cervicovaginal cytology as a good primary screening test for cervical intraepithelial neoplasia or carcinoma.

오블롱 셀 플레이트 열교환기에서의 R-l34a, R-407C, R-410A의 응축성능에 관한 실험적 연구

박재홍,김영수,Park, Jae-Hong,Kim, Young-Soo 대한기계학회 2004 大韓機械學會論文集B Vol.28 No.12

Condensation heat transfer experiments were conducted with the oblong shell and plate heat exchanger without oil in a refrigerant loop using R-l34a, R-407C and R-410A. An experimental refrigerant loop has been developed to measure the condensation heat transfer coefficient h$_{r}$ and frictional pressure drop $\Delta$p$_{f}$ of the various refrigerants in a vertical oblong shell and plate heat exchanger. The effects of the refrigerant mass flux(40∼80kg/$m^2$s), average heat flux(4∼8kW/$m^2$), refrigerant saturation temperature(30∼4$0^{\circ}C$) and vapor quality of refrigerants on the measured data were explored in detail. Similar to the case of a plate heat exchanger, even at a very low Reynolds number, the flow in the oblong shell and plate heat exchanger remains turbulent. A comparison of the performance of the various refrigerants revealed that R-410A had the highest heat transfer performance followed by R-l34a, and R-407C had the lowest performance of the refrigerants tested. The pressure drops were also reported in this paper. The pressure drops for R-410A were approximately 45% lower than those of R-l34a. R-407C had 30% lower pressure drops than R-l34a. Experimental results were compared with several correlations which predicted condensation heat transfer coefficients and frictional pressure drops. Comparison with the experimental data showed that the previously proposed correlations gave unsatisfactory results. Based on the present data, empirical correlations of the condensation heat transfer coefficient and the friction factor were proposed.tor were proposed.sed.