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.

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.

ME와 CP가 다른 유기사료 급여가 토종닭의 생산능력 계육품질 및 혈액성상에 미치는 영향

박재홍,정용대,윤명자,류경선,Park, Jae-Hong,Jeong, Yong-Dae,Yoon, Myung-Ja,Ryu, Kyeong-Seon 한국유기농업학회 2011 韓國有機農業學會誌 Vol.19 No.2

본 연구는 토종닭(한협 3호)에 사육 기간별 대사에너지 및 단백질 수준이 다른 유기사료의 급여가 생산성, 계육품질, 혈액성상에 미치는 영향을 구명하기 위하여 수행하였다. 실험설계는 전기, 중기, 후기에 각각 $2{\times}3$(ME 3,000, 3,100kcal/kg; CP 21, 22, 23%), $3{\times}3$(ME 3,100, 3,150, 3,200kcal/kg; CP 18, 19, 20%), $3{\times}3$(ME 3,100, 3,150, 3,200kcal/kg; CP 15, 16, 17%) 요인실험이며 처리구당 총 공시수 및 반복은 전기에 720수, 4반복, 중기에 702수, 6반복, 후기에 468수, 4반복으로 하였다. 사육 전기 4주간에 사료에너지 수준은 생산성에 영향을 미치지 않았지만 CP는 23% 처리구에서 증체량, 사료섭취량이 21, 22% 처리구보다 매우 증가하였다(P<0.05). 사료요구율은 사료내 단백질 수준이 높을수록 개선되었다(P<0.05). 사육 중기에 증체량은 사료내 에너지가 낮을수록, 단백질은 높을수록 증가하는 경향을 나타내었다. 사료내 에너지 및 단백질 수준은 사료섭취량에 영향을 미치지 않았다. 사료에너지 수준에 따른 사료요구율은 CP 19, 20% 처리구에서 18% 처리구보다 개선되었다(P<0.05). 사육 후기 증체량은 사료에너지와 단백질 수준에 따른 차이가 없었다. 사료섭취량은 ME 3,150, 3,200kcal/kg 처리구에서 ME 3,100 kcal/kg보다 감소하였지만 사료요구율은 개선되었다(P<0.05). 혈중 총단백질, 알부민, 글루코오스, 중성지방은 에너지 및 단백질수준에 따른 차이가 없었다. 혈중 총콜레스테롤은 ME 3,100kcal/kg 처리구에서 ME 3,200kcal/kg 처리구보다 감소하였고 CP 처리구간 차이는 없었다(P<0.05). 가열감량은 ME 3,150kcal/kg 처리구에서 ME 3,200kcal/kg 처리구보다 감소하였다(P<0.05). 수분함량, 전단력, pH은 ME, CP 처리구간 차이를 나타내지 않았다. 단백질용해성은 에너지 및 단백질수준이 높을수록 증가하였다. 계육내 콜라겐(collagen) 함량은 에너지 수준이 높을수록 증가하는 경향이 있다. 계육의 백색도는 사료내 에너지수준이 감소할수록, 단백질수준은 증가할수록 개선되는 경향이 있었다. 적색도는 ME 3,150kcal/kg 처리구에서 ME 3,100kcal/kg 보다 증가하였다(P<0.05). 황색도는 ME 3,100, 3,200kcal/kg 처리구에서 낮아졌으며, CP 15, 17% 처리구에서 CP 16% 처리구보다 매우 낮아졌다(P<0.05). 따라서, 사육기간별 적정 유기사료내 에너지 및 단백질수준은 사육전기 4주간에 ME 3,000kcal/kg, CP 23%, 중기 4주간에 ME 3,100kcal/kg, CP 19%, 후기 2주간에 ME 3,150kcal/kg, CP 16% 급여가 생산성 개선에 적합하였다. This study was conducted to investigate the effect of organic dietary metabolizable energy (ME) and crude protein (CP) on productivity, meat quality and blood composition of crossbred chicks (hanhyub 3 ho) for different growring periods. Experiments were factorially designed with ME 3,000, 3,100kcal/kg and CP 21, 22, 23% for starter (0-4wks); ME 3,100, 3,150, 3,200kcal/kg and CP 18, 19, 20% for grower (5-8wks); ME 3,100, 3,150, 3,200kcal/kg and CP 15, 16, 17% for finisher (9-10wks). The total number of chicks and replicate of each treatment for starter, grower, finisher were 720, 4; 702, 6; 468, 4, respectively. The diets was mixed with more 90% organic feed ingredients. The productivity were not influence by dietary ME for starting period. Weight gain and feed intake were significantly increased in CP 23% treatment than CP 21, 22% treatment (P<0.05). FCR was improved as dietary CP increased (P<0.05). Weight gain was tended to be increased by decreaing ME content and increasing CP contents for growing period. Feed intake showed no difference among the ME and CP treatment groups. FCR improved significantly in CP 19, 20% compared with CP 18% (P<0.05). Weight gain was not significantly different between ME and CP treatments for finishing period. Feed intake was lower in ME 3,150, 3,200kcal/kg than the ME 3,100 kcal/kg treatment (P<0.05). FCR was higher in ME 3,100kcal/kg than ME 3,150, 3,200kcal/kg treatment (P<0.05). Interaction on productivity was not exited between ME and CP treatment groups for different feeding periods. There was no difference in the total protein, albumin, glucose and triglyceride amount in blood depending on dietary ME and CP contents. Total cholesterol was greatly decreased in ME 3,100kcal/kg than the ME 3,200kcal/kg (P<0.05), but not different between CP treatments. Cooking loss of breast meat was lower in ME 3,150kcal/kg than the ME 3,200kcal/kg (P<0.05). Moisture, shear force and pH were not statistically different among treatments. Protein solubility was increased by increasing ME and CP in diets. The collagen was tended to increase as dietary ME increased. Redness was remarkably higher in ME 3,150kcal/kg than the ME 3,100kcal/kg (P<0.05). Yellowness of meat fed ME 3,150kcal/kg showed significantly lower than other treatments (P<0.05). Therefore, the optium ME and CP to improve the productivity for each period were 3,000kcal/kg, 23%; 3,100kcal/kg, 19%; 3,150kcal/kg, CP 16%, repectively.

폐의 미세유두상 패턴을 보이는 선암종의 기관지세척 세포소견 - 짧은 증례보고 -

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

Adenocarcinomas with micropapillary patterns are generally aggressive and show lymphotropism. Only a few reports on pulmonary adenocarcinoma with micropapillary patterns have described cytologic findings. A 70-year-old Korean woman was admitted to the hospital because of intermittent dry cough and chest pain. Cytology after bronchial washing showed neoplastic cells in small, angulated, cohesive clusters consisting of 3-20 cells without a fibrovascular core. The resected right middle lobe showed a tumor occupying almost the entire lobe. Histologically, about 90% of neoplastic cells proliferated with micro papillary morphology in the background of bronchioloalveolar carcinoma. Cytologic smears of a bronchial washing showing tumor cells in small, cohesive clusters without a fibrovascular core may indicate an adenocarcinoma with micropapillary pattern.

펨토초레이저 백내장 수술과 고식적 백내장 수술에서 수정체낭원형절개의 비교

박재홍,이경헌,이동준,Jae Hong Park,MD,Kyung Heon Lee,MD,Dong Jun Lee,MD 대한안과학회 2014 대한안과학회지 Vol.55 No.12

Purpose: To compare parameters of femtosecond laser and manual continuous curvilinear capsulorhexis (CCC) using anterior segment optical coherence tomography (AS-OCT). Methods: Femtosecond laser cataract surgery was performed in 30 eyes of 30 patients, and conventional cataract surgery with a manual CCC in 30 eyes of 30 patients. One month after surgery, CCC diameters, circularity of capsulotomy, and distance between the CCC and pupil center were analyzed using the AS-OCT. Results: Mean maximal CCC diameter was 4.96 ± 0.23 mm in the femtosecond laser group, and 4.70 ± 0.82 mm in the manual CCC group. Mean minimal CCC diameter was 4.91 ± 0.23 mm in the femtosecond group, and 4.48 ± 0.64 mm in the manual CCC group showing significant difference between the two groups (<EM>p</EM> = 0.000). Circularity of capsulotomy was 0.99 ± 0.01 in the femtosecond group and 0.91 ± 0.13 in the manual CCC group and was statistically different between the 2 groups (<EM>p </EM>= 0.000). The distance from the CCC center to the pupil center was 0.18 ± 0.09 mm in the femtosecond group and 0.26 ± 0.17 mm in the manual CCC group. The CCC center was closer to the pupil center in the femtosecond than in the manual CCC group (<EM>p</EM> = 0.038). Conclusions: Properly sized and shaped capsulotomy can be expected in femtosecond laser CCC compared with manual CCC. J Korean Ophthalmol Soc 2014;55(12):1800-1807

연령관련황반변성의 혈관내피성장인자억제제 주사치료 후 발생한 망막색소상피파열의 장기 경과관찰

박재홍,최우석,윤희성,Jae Hong Park,Woo Seok Choae,Hee Seong Yoon 대한안과학회 2014 대한안과학회지 Vol.55 No.9

Purpose: To evaluate the long-term clinical outcomes of retinal pigment epithelium (RPE) tears after intravitreal injection of anti- vascular endothelial growth factor (VEGF) agent for the treatment of neovascular age-related macular degeneration (AMD). Methods: The authors performed a retrospective chart review of 13 eyes of 13 patients who developed RPE tears after intravitreal anti-VEGF injection between February 2009 and June 2013. We investigated continuation of the treatment after tear, visual acuity, presence of cystoid macular edema, and central macular thickness (CMT) using optical coherence tomography (OCT) before and after treatment and visual outcomes depending on foveal sparing. Results: After RPE tear, 12 of 13 patients continued injection of an anti-VEGF agent. The average number of injections was 6.08 ± 5.18. Mean visual acuity immediately after tear was 1.65 ± 0.8 log MAR, and that at the last visit was 1.82 ± 0.88 log MAR. Nine eyes with macular edema in OCT continued receiving injection, and improvement of macular edema was observed in four eyes at the final visit. The final visual acuity of patients with foveal involvement was 2.17 ± 0.49 log MAR, which was worse than the 1.51 ± 1.06 log MAR in patients without foveal involvement, although the difference was not significant (<em>p</em> = 0.295). Conclusions: When anti-VEGF injections were continued after RPE tear, no improvement in visual acuity was observed, although better anatomical outcomes did result. Patients with foveal involvement had worse visual acuity than patients without foveal involvement, but the difference was not significant. J Korean Ophthalmol Soc 2014;55(9):1340-1346

도로표지 결로방지 예방기술에 관한 제언

박재홍,윤덕근,성정곤,강원의,Park, Jae-Hong,Yun, Duk-Geun,Sung, Jung-Gon,Kang, Weon-Eui 대한교통학회 2011 교통 기술과 정책 Vol.8 No.5

한방 치료 및 고관절 경근 추나로 호전된 양측성 대퇴골두 무혈성 괴사 환자의 치험 1례

박재홍,오은영,박수아,신유빈,김영준,Park, Jae-Hong,Oh, Eun-Young,Park, Su-A,Shin, Yoo-Bin,Kim, Young-Jun 척추신경추나의학회 2014 척추신경추나의학회지 Vol.9 No.1

Objectives : The aim of this study is to report the improved case of bilateral avascular necrosis(AVN) of femur head treated with Korean medicine and Fascia Chuna Therapy Methods : The patient diagnosed with bilateral AVN is hospitalized at department of korean rehabilitation medicine, Samse hospital of korean medicine. The subject is treated by herbal medicine, acupuncture, SBV and hip joint gyoung-geon chuna. This study was measured by visual analogue scale(VAS) score, walking time without pain per 6 minutes and harris hip score(HHS). Results : The patient showed decreased VAS score, HHS and improved walking time without pain per 6 minutes after treated with korean medicine and hip joint Fascia Chuna Therapy. Conclusions : The patient showed reduced pain and positive effect on activities of daily living.