3잔극형 전기용량 센서를 이용한 변압기 절연유의 열화감지특성 평가

김주한(Ju-Han Kim),서판석(Pan-Seok Seo),김필환(Pil-Hwan Kim),김명환(Myung-Hwan Kim),박홍석(Hung-Seok Park),한상옥(Sang-Ok Han) 대한전기학회 2004 대한전기학회 학술대회 논문집 Vol.2004 No.11

여성 방광암 발생 위험 인자로서의 대사 건강 상태에 관한 연구: 우리나라 여성의 국민건강보험공단 국가 건강검진 자료 활용

한다은(Da Eun Han),안순태(Sun Tae Ahn),김종욱(Jong Wook Kim),오미미(Mi Mi Oh),문두건(Du Geon Moon),한경도(Kyungdo Han),박홍석(Hong Seok Park) 대한비뇨기종양학회 2021 대한비뇨기종양학회지 Vol.19 No.4

Purpose: This study investigated metabolic health status as a risk factor for female bladder cancer using the National Health Checkups databases of Korea. Materials and Methods: We defined obesity if body mass index was ≥25 kg/m² and normal weight as <25 kg/m². Metabolic unhealthiness was defined when 3 or more criteria of metabolic syndrome were met. A total of 11,461,618 women who took National health Checkups between 2009 and 2012 were categorized as metabolic healthy normal weight (MHNW), metabolic unhealthy normal weight (MuHNW), metabolic health obese (MHO), and metabolic unhealthy obese (MuHO). Multivariable-adjusted Cox regression was done to analyze the hazard ratio of bladder cancer. Results: The mean age was 48±11.55 years and body mass index was 23.19±2.13 kg/m². During 5.4±1.1 years of follow-up, 3,893 patients were newly diagnosed with bladder cancer. Compared to MHNW group, the hazard ratio of MuHNW group and MuHO group were 1.237 and 1.288, respectively, while 0.997 in the MHO group. As the number of metabolic unhealthy criteria increased, the cumulative incidence of bladder cancer increased. Conclusions: As a result of a large-scale study conducted on the female population in Korea, the risk of bladder cancer increased with metabolic unhealthiness. Even with normal weight, if metabolically unhealthy, the risk of bladder cancer increased. The greater the degree of metabolic unhealthiness, the higher the risk of bladder cancer. Education on metabolic healthiness concerning female bladder cancer is necessary.

345㎸ 고장전류 저감을 위한 한류리액터 설치시 차단기 TRV(근거리 고장시) 검토

박홍석(H. S. Park),곽주식(J. S. Kwak),주형준(H. J. Ju),유희영(H. Y. Ryu),한상옥(S. O. Han) 대한전기학회 2005 대한전기학회 학술대회 논문집 Vol.2005 No.7

국산박류의 사료적 가치에 관한 연구 11 . 젓소에 대한 국산박류의 사료적 가치 비교시험

한인규,박홍석 ( In K . Han,Hong S . Park ) 한국축산학회 1980 한국축산학회지 Vol.22 No.1

Eight wether lambs and twenty Holstein cows were used in a 4×2 switch over digestibility experiment and a feeding experiment, respectively, to investigate the feeding value of soybean oil meal (SBOM), perilla oil meal(POM), sesame oil meal(SOM) or rapeseed oil meal(ROM) as protein supplements in an experimental concentrate ration for the milking cows. All the experiment concentrate rations contained about 15%, crude protein. Holstein cows were 5-6 years old and about 6-7 months after calving. They were fed the experimental concentrate ration 8㎏, silage 25㎏ and hay 3㎏ per day. The results obtained are as follows: 1. Apparent, digestibility and TDN values of he experimental concentrate ration were similar each other except the protein digestibility of rations containing SOM or RSM was, slightly lower (p$lt;0.05) than SBOM or YOM. 2. Milk production was gradually decreased as the experiment progressed, however the total milk solid content was maintained at the initial level for all the treatments except for the SOM group. 3. For all the treatments milk fat content was slightly increased as the experiment progressed but milk protein and solids-not-fat content was not affected by the sources of plant protein. 4. Overall results indicated that milk production was the only significant. difference(p$lt;0.05) among the treatment and it was higher for the SBOM arid RSM group than POM or SOM treatment. Milk fat, milk protein and solids-not-fat production showed similar tendency to that of milk production among treatments with no statistical significance.

국산박류의 사료적 가치에 관한 연구 10 . 대두박 급여수준이 사료 소화율 , 산유량 및 우유성분에 미치는 영향

한인규,박홍석 ( In K . Han,Hong S . Park ) 한국축산학회 1980 한국축산학회지 Vol.22 No.1

Using eight wether lambs and twenty Holstein milking cows, a 4 × 2 switch over digestion trial and a feeding trial, respectively, were conducted to investigate the effect of dietary protein level as increased by soybean oil meal on ration digestibility, milk production and milk composition. Experimental Holstein cows were 3-6 years old and 5-6 months after the partrition. They were fed experimental concentrate ration 8 ㎏, silage 25 ㎏ and hay 3 ㎏ per day. Dietary protein levels of experimental concentrate rations veers 13, 15, 17, and 19%. The results obtained are as follows; 1. Apparent digestibility of the concentrate ration were not affected by the dietary protein level except the protein digestibility which increased gradually as the dietary protein level increased (p$lt;0.05). 2. Daily milk production of cows fed the ration containing 13% protein was gradually decreased while others increased and reached about 20% increase by the 5th week of feeding experimental concentrate, then gradually decreased. 3. The composition of the milk produced by cows fed the rations containing 15, 17 or 19% protein was not changed although their weekly mills: production was varied greatly during the experimental period. 4. Overall daily milk production was significantly high for the cows fed the ration containing 15 % protein than those fed the 13 % protein ration. Cows fed either 17 or 19% dietary protein showed similar response to the cows fed ration containing 15% protein. 5. There was no difference in milk composition among treatments. however, the production of milk fat, milk protein and solids-not-fat were higher for the 15% dietary protein than for the 13% protein group due to the higher milk production. The above mentioned results suggest that the dietary protein level of concentrate for the cows in late lactation should be more than 15% for a normal milk production.

국내 학술지 평가모형에 관한 연구

한상완,박홍석,Han Sang-Wan,Park Hong-Seok 한국문헌정보학회 1999 한국문헌정보학회지 Vol.33 No.2

The academic journal is a very important means for science communication, and it is critical for academic development. Most of Korean academic journals are not doing their fundamental roles because of the researchers' perception about their quality. A fundamental thing for Korean academic journals to contribute effectively to science communication would be the effective evaluation on the Journal. The purpose of this study is to develop an evaluation model for Korean academic journals. This model will be effective for quality measurement, manifestation of the strength and weakness, and for the improvement of journal quality. It was developed through analysis on evaluation activities of two institutions, and through interviews and surveys on Korean researchers. 학술지는 학문교류에 매우 중요한 수단이기 때문에 한 나라의 학문 발전에 매우 중요한 역할을 담당하고 있다. 그러나 대부분의 국내 학술지는 이의 질에 대한 낮은 인식으로 인해 학술지의 기본적인 기능을 제대로 수행하지 못하고 있다. 국내 학술지가 학술지로서의 역할을 수행하기 위해 이루어져야 할 것이 많겠지만 가장 근본적인 것이 학술지에 대한 평가이다. 본 연구의 목적은 국내 학술지를 공정하고 효과적으로 평가할 수 있는 평가 모형을 개발하는 것이다. 즉, 학술지의 질을 정확하게 측정할 수 있고 학술지의 장점과 단점을 보여줄 수 있으며, 장점을 살리고 단점을 보완할 수 있는 방법을 제시할 수 있고 그리고 국내 학계의 사회문화적인 환경에 맞아 그 기능을 원활하게 수행할 수 있어 평가의 근본 기능을 효과적으로 수행할 수 있는 평가모형을 개발하는 것이다. 국내 연구자들에 대한 면담과 설문조사, 외국 사례 분석 등의 과정을 통해 평가모형을 개발하였다.

목질자원의 사료화 가치시험

한인규,박홍석 ( I . K . Han,H . S . Park ) 한국축산학회 1982 한국축산학회지 Vol.24 No.1

In order to investigate the feasibility of using hard wood residue as an animal feed, poplar wood sawdust was treated with solutions of NaOH ranging from 3 to 12% of the sawdust. Untreated and the treated sawdust were then subjected to chemical analysis, in vitro rumen digestibility experiment and a feeding trial with eight wether lambs weighing average about 20㎏. Sawdust either untreated or NaOH-treated at a 9% level was substituted the basal concentrate mixture by 20% for the feeding trial. As the NaOH level increased NDF (neutral detergent fiber), ADF (acid detergent fiber) and lignin content were markedly decreased until NaOH level reached 9% of the sawdust. NDF, ADF and lignin content of the 9% NaOH-treated sawdust were 73.77, 64.38 and 16.09% while those of the untreated were 90.99, 71.56 and 22.22%, respectively. Cellulose content, on the other hand, was not changed up to the 6% NaOH level but slightly decreased at higher levels. The digestibilities of DM (dry matter) and fiber were increased rapidly up to the NaOH 6% level, and then gradually levelled off. Digestibility of IBM, ADF, and cellulose for untreated and the 9% NaOH-treated sawdust were 7.85, 8.57 and 10.15% and 37.03, 40.60, and 52.50%, respectively. Wether lambs fed rations containing 20% of 9% NaOH-treated sawdust for 28 days showed significant (P$lt;0.01) improvement in feed consumption, weight gain and feed efficiency. The results of this study showed that treating poplar wood sawdust with NaOH was very effective in improving poplar wood fiber digestion by the lumen microorganisms and the feeding value to the ruminants. However, further detailed studies are necessary to verify the economical advantage of treating hard wood with alkali.

피혁분의 사료화에 관한 연구 4 . 육성한우에 대한 피혁분의 적정급여수준 결정을 위한 연구

한인규,최윤재,박홍석 ( In K . Han,Yun J . Choi,Hong S . Park ) 한국축산학회 1980 한국축산학회지 Vol.22 No.4

This experiment was carried out to determine the optimum using level and the nutritive values of hydrolyzed leather meal (HLM) for growing korean, cattle. The HLM was added at the level of 0, 1, 5, 3.0% of the rations, replacing an isonitrogenous amount of protein supplement. These rations were fed to 12 korean cattle fir a period of 21 weeks from December 18, 1978 to May 15, 1979. The chromium retention in the tissues or organs of cattle was also investigated. The results obtained are summarized as follows; 1. The nutrients content and pepsin digestibility were varied by the HLM produced at different plant. Crude protein content was more than 70% in general, and pepsin digestibility was 36.8% for the lowest and 84.5% for the highest. Analytical data revealed that the content of glycine, praline, glutamic acid, alanine, arginine was higher than other amino acid. and the content of chromium was found to be 2-3%. Such non-essential minerals as Pb, Ti, Sr were found considerably in HLM, and Pb, Ti, 5r content was varied by the kind of HLM tested. The HLM used in feeding experiment contained 72.30% crude protein, 43.4% pepsin digestibility and 2.72% chromium. 2. Cattle fed diet containing 1.5% HLM gained more body weight than cattle fed either 3.0% or 0% HLM, however, statistical difference was not found among treatments. 3. The feed intake, and feed efficiencies were not affected by the level of HLM used. 4. Chromium retentions in kidney and small intestine were increased as the level of HLM in cattle rations increased, but there were no differences in other tissues or organs examined. It was found that chromium content of rumen was the highest among the tissues and organs examined. From the results of this experiment, it may be concluded that HLM can be used as an alternative source of protein in the growing korean cattle ration at the level of 3%, but the optimum using level might be 1.5%, and nutritive values of HLM was similar to or better than those of protein supplements.

피혁분의 사료화에 관한 연구 3 . 육성비육돈에 대한 피혁분의 적정급여수준 결정을 위한 연구

한인규,유문일,권관,박홍석 ( In K . Han,Moon I . Yoo,K . Kwan,Hon S . Park ) 한국축산학회 1980 한국축산학회지 Vol.22 No.4

A total of 200 three-way crossbreds (Landrace × Duroc × Large White) were employed to investigate the feeding effect of different level (0%, 1%, 2%., 3%) of hydrolyzed leather meal (HLM) and 2% of fortified leather meal (FLM: as shown in Table 3) to growing-finishing swine for a period of 15 weeks. The results obtained are summarized as follows. 1. Nutrients content of HLM was varied by different sources (makers) of HLM. It was found that the HLM used in feeding experiment contained 75. 21% crude protein, 2.72% chromium and 57.86% pepsin digestibility. Analytical data revealed that HLM contained fairly large amount of glycine, proline, alanine, arginine and contained small amount of other essential amino acids such as methionine and lysine. 2. Experimental results on weight Rain and feed efficiency indicated that optimum using level of HLM in swine rations was 1 %, and 2 % in case of FLM. 3. Digestibility and digestible nutrients content of experimental rations were not affected by the levels of HLM used 4. Carcass data showed that thinner backfat and larger loin eye muscle area were obtained by supplement of 1 % HLM. 5. Chromium retention in kidney was the highest among the tissues, and was higher as the level of HLM in swine ration increased. Accumulation of chromium in bone was the lowest. But it seemed that chromium content of tissues and organs except kidney had little connection with feeding levels of HLM. The results from this experiment indicate that HLM can be used as a protein source in properly balanced swine ration at level of 1 %, and 2% in case of FLM.

옥피사료의 개발에 관한연구 1 . 옥피사료의 반추 미생물에 의한 in vitro 발효 및 in vivo 소화율 및 질소균형에 미치는 영향

한인규,손광수,정정수,박홍석 ( In K . Han,K . S . Sohn,C . S . Chung,H . S . Park ) 한국축산학회 1979 한국축산학회지 Vol.21 No.6

In an effort to develope a corn bran-based concentrate feed for growing Korean cattle, corn bran was used at the levels of 50%, 40, and 30% and the rest was supplemented with proper nutrients. Energy and nitrogen were supplemented with corn starch, molasses, corn germ meal and urea. Vitamines and mineral sources were also added in the mixture. As a preliminary step of evaluating the feeding value of these corn bran feed, an in vitro fermentation and an in vivo digestibility experiment were conducted. The results obtained were as follows 1. During the first 12 hours of in vitro fermentation production of acetic, propionic and butyric acid from the feed containing 50% corn bran was significantly (P$lt;0.05) lower than the control or other cornbran feeds. However, after 24 hours of fermentation there was no difference in the production of these acids except acetic and propionic acid that were significantly (P$lt;0.05) higher for the feed containing 30% corn bran than other. 2. Digestibility of crude fiber and ash was higher and ether extract v, as lower for the corn bran feeds than the control feed in general. As the corn bran level was lowered, digestibility of crude protein and nitrogen free extract was increased but digestibility of crude fiber and ether extract was decreased. 3. Total digestible nutrients (TDN) of the control, the feeds containing 50%, 40% and 30% corn bran were 56.68, 55.59, 58.02 and 58.27%, respectively. As the corn bran level was lowered, digestible nitrogen free extract was increased and that made TDN value higher but significantly lowered digestible crude fiber of the feed containing 30%, corn bran made its TDN value similar to that of the feed containing 40% corn bran. 4. During the collection period of the digestion trial, fecal excretion of nit rogen was lowest for the feed containing 30 % corn bran but urinary excretion of nitrogen was highest for the diet containing 50% corn bran. Nitrogen retention was about 12.0% of intake for the diet containing 50 % corn bran and about 20.0 % for the rest corn bran feeds and control feed. 5. Over all results, considering the fact that the digestibility of crude fiber was depressed and scouring problem was observed with the diet containing 30% corn bran, indicate that corn bran can be succesfully used at the level of 40% on more in a corn bran-based concentrate mixture for cattle feeding.