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소화성 궤양환자의 흡연여부에 따른 혈청 Pepsinogen 1 치의 변화
오재선(Jae Sun Oh),김평남(Pyung Nam Kim),나한식(Han Sik Na),김중남(Jung Nam Kim),문철웅(Chul Oong Moon),김만우(Man Woo Kim),양성훈(Sung Hun Yang) 대한내과학회 1990 대한내과학회지 Vol.39 No.4
N/A Serum group I Pepsinogen (sPG I) levels were measured by radioimmunoassay in 159 patients undergoing endoscopy, then all patients were classified by endoscopic diagnosis, gastric mucosal histology, and smoking habits. The results were as follows: 1) Both nonulcer dyspepsia and duodenal ulcer smokers had significantly higher sPG I levels than their nonsmoking controls (p<0.005). 2) The frequency distvibution of superficial gastritis in the nonulcer dyspcpsia group with smoking habits revealed significantly higher levels than that of the nonsmoking controls (p<0.0025). 3) Serum PG Iin nonulcer dyspepsia patients revealed significantly higher levels in patients with superficial gastritis but there were not related to cigarette smoking. 4) The relationship between the mean level of serum PG I and fundic mucosal histology in duodenal ulcer patients was found to be statistically insignificant, but the mean level of sPG I in the smoking group showed a higher value than that of the nonsmoking controis (p< 0. 05). 5) The frequency distribution of high serum PG I level (> 80 ng/ml) in duodenal ulcer smokers was higher than that of the nonsmoking control group (chi square test: p<0.). From the above findings, it is concluded that the smoking induced increase in sPG I in duodenal ulcer is proposed to release an augmented pepsin secretory capacity, which can have aetiologic significance in association between smoking and duodenal ulcer.
기후변수와 쌀 단수간의 인과성 및 이상기후가 쌀 단수에 미치는 영향 분석
노재선 ( Jae Sun Roh ),권오삼 ( Oh Sang Kwon ),조승현 ( Seung Hyun Cho ) 한국농업경제학회 2012 農業經濟硏究 Vol.53 No.1
Recently the climate change issues due to the greenhouse effect have been discussed with respect to agricultural production. The likelihood of the impact on agricultural production of either extreme weather or climate change has been recognized, but the close examination for the causality between climate variables and rice yields has not been conducted. Thus the Granger causality test between climate variables and rice yields is carried out. We find that the rainfall, rainfall days, sunshine hours, and temperature significantly affect rice yields. Also, it is shown that the exceptionally low rice yields occurred in recent years can be explained by the related abnormal climates defined by meteorologists.
농업․농촌에 대한 관심 및 이해도가 농업부문 공공 R&D사업을 위한 지불의사에 미치는 영향 : 2변량 순위 프로빗 CVM 분석
권오상(Oh-Sang Kwon),노재선(Jae-Sun Roh),이혜진(Hae-Jin Lee),박경원(Kyung-Won Park),서영(Young Suh) 한국농업경제학회 2010 農業經濟硏究 Vol.51 No.4
The paper estimates Korean people`s willingness to pay for public agricultural R&D expenditures using a contingent valuation method incorporating the impacts of the degree of understanding of agricultural issues, which is formed as a function of individual characteristics endogenously. A bivariate ordered probit CV model that takes care of the endogeneity issue is constructed and estimated. The bivariate model rejects the usual approach that estimates the mechanisms of understanding-formation and WTP-determination independently. It is shown that socio-economic characteristics of individuals affect their degree of understanding and thereby their WTPs indirectly rather than affect the latter directly.
농업,농촌에 대한 관심 및 이해도가 농업부문 공공R&D사업을 위한 지불의사에 미치는 영향: 2변량 순위 프로빗 CVM 분석
권오상 ( Oh Sang Kwon ),노재선 ( Jae Sun Roh ),이혜진 ( Hae Jin Lee ),박경원 ( Kyung Won Park ),서영 ( Young Suh ) 한국농업경제학회 2010 農業經濟硏究 Vol.51 No.4
The paper estimates Korean people`s willingness to pay for public agricultural R&D expenditures using a contingent valuation method incorporating the impacts of the degree of understanding of agricultural issues, which is formed as a function of individual characteristics endogenously. A bivariate ordered probit CV model that takes care of the endogeneity issue is constructed and estimated. The bivariate model rejects the usual approach that estimates the mechanisms of understanding-formation and WTP-determination independently. It is shown that socio-economic characteristics of individuals affect their degree of understanding and thereby their WTPs indirectly rather than affect the latter directly.
기상이변에 따른 농업생산 손실의 경제적 효과: 투입산출 및 CGE 분석
권오상 ( Oh Sang Kwon ),노재선 ( Jae Sun Roh ),서영 ( Young Suh ) 한국농업경제학회 2012 農業經濟硏究 Vol.53 No.2
The purpose of this study in analyzing the general equilibrium impacts of agricultural production losses that occurred in 2010 due to the abnormal weather conditions. An input-output model and a computable general equilibrium model containing a detailed specifficatio of agricultural sector are constructed and used for the analysis. It is shown that the losses generated are a decline in GDP by 0.12% and a decline in household income by 0.19%. The study also shows that the burdens to low income classes are much higher than those of high income classes, and hence, the impacts are quite regressive.
한우에서 $PGF_{2{\alpha}}$ 투여에 의한 발정유도 후 난소 구조물 및 호르몬의 변화와 수태율
박철호,류재선,유대중,박인철,김종택,서국현,오기석,손창호,Park, Chul-Ho,Ryu, Jae-Sun,Yu, Dae-Jung,Park, In-Chul,Kim, Jong-Taek,Suh, Guk-Hyun,Oh, Ki-Seok,Son, Chang-Ho 한국수정란이식학회 2012 한국동물생명공학회지 Vol.27 No.3
This study was carried out to develop the useful inducing method of estrus for Korean native cows. Under the condition of estrus induction by administering $PGF_{2{\alpha}}$ for the cows in which corpus luteum (CL) in ovaries was detected by ultrasonography, ovarian responses and the changes of progesterone ($P_4$) concentration against $PGF_{2{\alpha}}$ compared with conception rate were observed in cows and heifers. In inducing estrus administering $PGF_{2{\alpha}}$. to the cows which has corpus luteum in ovaries, ovarian reponses, the changes of progesterone concentration, and conception rate were identified and compared. The results attained from the studies were as follows. Significant decreases of CL in size over time after $PGF_{2{\alpha}}$ administration were detected in both cow and heifer groups (p<0.001), but not different between groups in the CL regression rate (p>0.05). In addition, the percentage changes relative to the plasma $P_4$ concentration on day 1 after $PGF_{2{\alpha}}$ treatment were decreased to below 1ng/ml. The growth rate of follicle was observed as 31% on day 1 and 42% on day 2 in cows, and 34% on day 1 and 97% on day 2 in heifers, resulting that growth of heifers are faster than that of cows (p<0.05). The conception rate after $PGF_{2{\alpha}}$ treatment were 60.5% and 64.2% in cows and heifers, respectively. It also indicated that the conception rate after estrus observation with $PGF_{2{\alpha}}$ injection was as high as 66.6% while that with timed-artificial insemination (TAI) regardless of the estrus observation was 56%, which means the pregnancy rate of artificial insemination after estrus observation was higher than that of TAI (p<0.05). In the result of all above, there were significant decreases in CL size and the plasma $P_4$ concentration by days but rapid growth in follicles, which has no differences in cows and heifers. The conception rate was commonly high after estrus observation and more than 50% under TAI.
설문조사기법을 이용한 다원적 농업의 범위의 경제성 검정
권오상 ( Oh Sang Kwon ),김기철 ( Gi Cheol Kim ),노재선 ( Jae Sun Roh ) 한국농업경제학회 2004 農業經濟硏究 Vol.45 No.2
N/A This study conducts a survey and tests whether Korean people believe that there are economies of scope in providing agricultural commodity and noncommodity outputs. The questionnaire suggests five alternative ways of providing commodity and noncommodity outputs. Each alternative contains different number of outputs provided by domestic producers. The respondents are requested to express their extent of support for each alternative considering the benefits and costs of each alternative. A panel ordered probit model is estimated. We find that there are strong economies of scope in multifunctional agriculture. Domestic production of agricultural commodity output is evaluated much more important than producing other noncommodity outputs such as environmental goods, rural amenity, rural viability and food security. Among the noncommodity outputs rural viability is assessed as the most valuable one.
한우에서 $PGF_{2{\alpha}}$ 투여 후 난포 크기 및 발달 과정에 따른 발정 증상의 발현
박철호,류재선,유대중,박인철,김종택,서국현,오기석,손창호,Park, Chul-Ho,Ryu, Jae-Sun,Yu, Dae-Jung,Park, In-Chul,Kim, Jong-Taek,Suh, Guk-Hyun,Oh, Ki-Seok,Son, Chang-Ho 한국수정란이식학회 2012 한국동물생명공학회지 Vol.27 No.3
This study was operated to establish induction using ultrasonography by estimating the relation of follicle size and estrus manifestation. Clinical estrus symptoms were observed 97.4% in cows and 87.5% in heifers when overall 55 cows were induced to estrus in a single dose of $PGF_{2{\alpha}}$ after verifying CL through ultrasonography, which means estrus hours among those 52 cows showing the clinical estrus symptoms were estimated 2.39 days on cows and for 2.37 days on heifers which showed no differences (p>0.05). The estrus manifestation hours according to the follicle size in cows didn't have any significance each other (p>0.05), though estrus hours was 54 hours (the shortest) with follicle size bigger than 10 mm and were made up within 69 hours. The estrus manifestation hours according to the follicle size in heifers didn't have any significance each other (p>0.05) and took around 42 hours (the shortest) with follicle size of 5mm (the smallest) and were made up within 66 hours. Follicles after $PGF_{2{\alpha}}$ injection were ovulated and assigned to many phases as follows; Group 1 (growing phase) - continuously growing into ovulation, Group 2 (growing and static phase) - delaying in growth after the growth of follicles, Group 3 (static and growing phase) - growing after growth delay, Group 4 (regressing and new growing phase) - the follicle is closed and a new follicle grows. In addition, the process of follicle development and estrus hours had no significance each other (p>0.05), though estrus manifestation hours in Group 1 and 2 was relatively short, and in Group 3 and 4 for a relatively long time. In the result of all above, the estrus manifestation hours after $PGF_{2{\alpha}}$ injection has no differences accoring to the follicle size in cows and heifers. Therefore, High pregnancy rate is obtained when practicing artificial insemination within 3 days in estrus or TAI in 72 to 80 hours after adminitrating $PGF_{2{\alpha}}$.