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박광일,Park, Kwang-Il 한국생명보험의학회 2010 保險醫學會誌 Vol.29 No.1
The measurement of prostate specific antigen (PSA) in screening for prostate cancer is recently performed as a routine check-up in clinical medicine and insurance medicine. Several factors may affect serum PSA levels. As prostate size increases with increasing age, the PSA concentration also rises. Increasing body mass index (BMI) is associated with a lower mean PSA concentration. Inhibitors of 5-alpha-reductase such as finasteride and dutasteride produce a 50 percent or greater decrease in serum PSA during the first three months of therapy, which persists as long as the drug is continued. Men who are regularly taking non-steroidal antiinflammatory drugs (NSAIDs) or acetaminophen have lower PSA levels. Emerging concepts regarding PSA testing that may help refine the interpretation of an elevated concentration include: PSA density, PSA velocity, and Free versus complexed or bound PSA. With many insurance companies, PSA level has become part of a standard battery of blood tests, along with HIV, cholesterol, liver enzymes, and other predictors of premature death. But, there is no clear proof of benefit, so we have to monitor the value of PSA test as a prostate cancer screening test in insurance medicine.
박광일,Park, Kwang-Il 한국생명보험의학회 2011 保險醫學會誌 Vol.30 No.2
Background: The beneficial effects of implantable cardioverter defibrillators (ICDs) in primary and secondary prevention patients are well established. However, data on potential differences between both groups in mortality are scarce. The aim of this study was to assess extra risk differences between primary and secondary prevention ICD recipients. Methods: Comparative mortality figures were calculated from a source article using mortality analysis methods. Results: Mortality ratio (MR) of primary and secondary prevention ICD recipients were 393% and 373%. Excess death rates (EDR) of both groups were 42 and 38 per 1,000. Discussion: MR and EDR were higher in primary prevention group. But, there was no significant difference.
박광일(Il-Kwang Park) 산업기술교육훈련학회 2009 산업기술연구논문지 (JITR) Vol.14 No.1
This paper is analyzed an economic results into focused strategy of Skinner in own country companies. Analysis of the company s economic results is higher than the others due to production strategy factors is focused on. Therefore, these results supported Skinner s focused strategy theory.
칼슘과 비타민 D 섭취가 티타늄 임플랜트 주위의 골 형성에 미치는 영향
박광일(Kwang-Il Park),이재열(Jae-Yeol Lee),황대석(Dae-Seok Hwang),김용덕(Yong-Deok Kim),김규천(Gyoo-Cheon Kim),신상훈(Sang-Hun Shin),김욱규(Uk-Kyu Kim),정인교(In-Kyo Chung) 대한구강악안면외과학회 2007 대한구강악안면외과학회지 Vol.33 No.2
The purpose of this study was to observe the effect of calcium and vitamin D to the titanium implant osseointegration in animal model. 32 rats, 10 weeks of age, were divided into two group: additional calcium and vitamin D supplementation group and a control group. Titanium screw implant(diameter, 2.0mm; length, 3.5mm; pitch-height 0.4 ㎜) were placed into tibia of 32 rats, 16 in the control group and 16 in the experimental group. The rats were sacrificed at different time interval(1, 2, 4, and 8 weeks after implantation) for histopathologic observation, histomorphometric analysis and immunohistochemistry with osteocalcin and osteopontin antibody. Histopathologically findings, newly formed bone was seen at 1 weeks and became lamellar bone at 2 weeks, and mature trabecullar bone was seen at 4 weeks experimental group. In control group, thickness of regenerated bone increased till 4 weeks gradually and trabecullar bone was seen at 8 weeks. By histomorphometric analysis, bone marrow density was increased significantly at 1 and 2 weeks in experimental group compared to control group. Osteocalcin immunoreactivity was strong at 1 week experimental group and reduced after 4 weeks gradually. But it was continuously weakly from 1 to 4 weeks in control group. Osteopontin immunoreactivity was very strong in newly formed bone from 2 to 8 weeks experimental group. And the amount of osteopontin expression was more abundant in experimental group. The results of this study suggest that calcium and vitamin D supplementation promotes bone healing around dental implants
거주자의 계절별 위생활동 변화와 연간 온수 소비량 예측
박광일(Park, Kwang-Il),곽인규(Kwak, In-Kyu),문선혜(Mun, Sun-hye),허정호(Huh, Jung-Ho) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.2
In order to calculate the energy consumption through the exact implementation of the simulation and the equation, the behavior of the resident should be reflected. Domestic hot water consumption energy is generated for residents’ hygiene. Hygiene activities have shower wash dishes. The temperature and frequency of water used in hygiene activities varies seasonally. For accurate calculation of annual domestic hot water consumption, it is necessary to accurately consider changes in temperature and frequency of water used for each season. To predict the usage of domestic hot water, this paper measured the temperature and frequency on use related to sanitary activities and analyzed seasonal changes.
거주자 위생활동 특성의 계절적 변화가 급탕 에너지 소비량에 미치는 영향
박광일(Park, Kwang-il),곽인규(Kwak, In-Gyu),문선혜(Mun, Sun-Hye),허정호(Huh, Jung-Ho) 대한건축학회 2018 大韓建築學會論文集 : 構造系 Vol.34 No.5
The purpose of this study was to analyze the effect of seasonal change in characteristics of hygiene activity on domestic hot water energy consumption. With 16 residents of 4 households, the data about frequency of hygiene activity and water temperature was collected from February to August, 2017.The results of collected data discovered that the frequency of hygiene activity was higher especially in summer, whereas the consumption of warm water they used was higher in winter. The seasonal change in characteristics of hygiene activity was analyzed to be changed and strongly influenced by outdoor temperature .The influence of characteristics of hygiene activity on hot water consumption was analyzed. There was 13% of difference between consumption that was calculated taking characteristics of hygiene activity into account and consumption that was not. Therefore, this study suggested hygiene activity schedule, hot water profile and hot water consumption pattern, which can be utilized for improving simulation as well.
가정에서 발생한 서로 다른 종류의 음식물 쓰레기가 줄지렁이(Eisenia fetida)개체군의 섭식 및 생장에 치미는 영향
박광일(Kwang-Il, Park),배윤환(Yoon-Hwan, Bae) 유기성자원학회 2013 유기물자원화 Vol.21 No.1
국내의 4인 가족 가정의 음식물 쓰레기 발생량을 염분이 가미된 것과 염분이 가미되지 않은 것으로 구분하여 조사하였고, 음식물 쓰레기를 염분이 가미되지 않은 채소류, 곡류, 과일류, 염분이 가미된 음식물 쓰레기로 구분하여 줄지렁이에게 공급하면서 지렁이의 섭식량 및 증식률을 조사하였다. 음식물 쓰레기량은 1가정 1주당 3,200 g(1인당 1일 0.114 kg)이었고, 그 중 염분이 가미되지 않은 것은 전체의 53.9%인 1,723.8 g 으로 나타났다. 함수율 70%를 가정하였을 때 채소류, 곡류, 과일류의 염도는 각각 0.60, 036, 0.33%이었고, 염분이 가미된 음식물 쓰레기의 염도는 0.78%이었다. 채소류, 과일류에서는 지렁이의 섭식은 잘 이루어졌으나 증체율이 낮았고, 곡류에서는 상대적으로 섭식량은 낮았지만 증체율이 높았다. 함수율 70%인 먹이의 염도가 0.6% 이상인 경우에는 지렁이의 섭식과 생장이 현저하게 둔화하였고, 0.3%인 경우에는 섭식은 정상적으로 이루어졌으나 생장이 약간 저해되었다. 따라서 염분이 가미된 음식물 쓰레기는 전처리과정 없이는 지렁이 처리가 불가능하며, 염분이 가미되지 않은 음식물 쓰레기는 지렁이 처리가 용이한 것으로 나타났다. The amount of salted food waste and non-salted food waste from household consisted of 4 family members was surveyed. And the feeding rate and growth rate of Eisenia fetida population upon the different food wastes such as vegetables, grains, fruits and salted food waste were investigated. Total amount of food waste from a household was 3,200g/week. i.e. 0.114kg/day/capita and non-salted food waste was 53.9% of food waste. Salt contents of vegetables, grains, fruits were 0.60, 0.36 and 0.33%, respectively, if they were assumed to have 70% water content. Salt content of salted food waste was 0.78%. Upon the non-salted vegetables and fruits, feeding rate of earthworm was high but growth rate was low. Upon the non-salted grains, feeding rate of earthworm was low but growth rate was high. Upon the food with 70% water content, earthworm could not feed and grow when salt content of food was over 0.6%, and earthworm could feed normally but showed low growth rate when salt content of food was 0.3%. These results indicated that earthworm could stabilize the non-salted food wastes with ease but could hardly stabilize the salted food wastes.
아이스링크 빙판 내부 LED디스플레이 결빙 구조 및 영상 최적화에 관한 연구
박광일(Kwang Il Park),장재현(Jae-Hyun Jang),유영문(Yong Moon Yu) 한국조명·전기설비학회 2018 조명·전기설비학회논문지 Vol.32 No.3
In this paper, we investigated the structure of ice for optimized image mapping after installing LED display device in the ice. The LED display device installed inside the ice transmits the image to the outside of the ice sheet, while the projector above the ice reflects the image from the ice surface. The core part that affects the LED display and projector image inside the ice structure is the scattering layer. The light transmittance was measured by the scattering layer application frequency, and the relative luminance ratio was calculated by measuring the LED display transmission luminance and the projector reflection luminance. Then, the mapping characteristics that overlapped the LED display image and the projector image were observed and the optimum image mapping condition was confirmed. Through this study, it was confirmed that the larger the scattering layer concentration, the smaller the difference between the LED display luminance and the projector luminance, and the better the mapping image can be obtained.