과원 규모화 사업이 농가 수익성에 미치는 영향 - 사과를 중심으로 -

김세혁,김태균,임청룡 한국농촌계획학회 2024 농촌계획 Vol.30 No.1

The purpose of this study is to analyze how the orchard scale improvement project affects the profits of apple farmers. For this purpose, the variable profit function of Apple was estimated using seemingly unrelated regression analysis. For the analysis, raw data from the Rural Development Administration's Agricultural Income Survey from 2015 to 2021 were used. Of the 1,009 apple farms, 95 farms participated in the orchard scale improvement project and 914 farms did not participate. The results show that the profits of farms participating in the project were found to be higher than those of non-participating farms, and as the cultivation area increased, profits tended to increase and then decrease. The results also indicated that below a certain size (19,462㎡), the profits from project participation appear to be lower. The results of this study can provide useful information to the establishment of government policies and apple farmers who want to participate in the orchard scale improvement project.

단기간의 크레아틴 섭취에 따른 유도선수들의 신체조성과 혈중지질의 변화 : 단기간의 크레아틴 섭취에 따른 유도선수들의 신체조성과 혈중지질의 변화

김세혁,양정옥,김영수 신라대학교 자연과학연구소 2009 自然科學論文集 Vol.18 No.-

귀농인의 경제 및 생활 만족도에 영향을 미치는 요인

김세혁,김현,김태균 한국농식품정책학회 2022 농업경영정책연구 Vol.49 No.4

The purpose of this study is to analyze the factors affecting the satisfaction of urban to rural migrants. The satisfaction of urban to rural migrants was divided into two factors, economic satisfaction and life satisfaction. A nationwide survey of 466 urban to rural migrants was conducted and a seemingly unrelated bivariate ordered probit model was estimated. The results show that the factors affecting economic satisfaction are economic motivation, migration with family, having debt, affinity with neighbors, time to participate in agricultural education, number of participation in local activities, and satisfaction with living expenses. The factors affecting life satisfaction are economic motivation, having debt, number of participation in local activities, satisfaction with living expenses, relationship with neighbors, and family support. The results also indicate that the increase in annual income improves economic and living satisfaction. The results of this study may contribute more implications and useful information to the government’s policy for urban to rural migration.

실물옵션가치를 이용한 한우 거세우 적정 사양기간 분석

김세혁,김태균,김현석 한국농업경제학회 2019 農業經濟硏究 Vol.60 No.3

The purpose of this study is to determine the optimal cutoff price of Hanwoo steers to maximize farmers’ income using real option values. To determine the optimal cutoff price, this study first estimates the carcass weight of Hanwoo steer to reflect the change of weight by time period to the price process. Then, the mean reverting price process, which not only reflects change in weight but also change in grade, is estimated. Finally, this study determines the cutoff price using the universal lattice option pricing model. The results show that the maximum cutoff price of Hanwoo steer is 8,215,284 won at the 4th week of 27 months. Therefore, we can conclude that the optimal selling point of Hanwoo steers is the 4th week of 27 months to maximize income of Hanwoo steers fattening farms.

백서에서 삼차신경 유발전위의 특성과 경로 분석

김세혁,조춘식,권오규,이배환,박용구,정상섭,Kim, Se-Hyuk,Zhao, Chun-Zhi,Kwon, Oh-Kyoo,Lee, Bae-Hwan,Park, Yong-Gou,Chung, Sang-Sup 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.8

Objective : There are some advantages of trigeminal evoked potential(TEP) recording compared to other somatosensory evoked potential(SSEP) recordings. The trigeminal sensory pathway has a pure sensory nerve branch, a broader receptive field in cerebral cortex, and a shorter pathway. Despite these advantages, there is little agreement as to what constitutes a normal response and what wave forms truly characterize the intraoperative TEP. This study presents the normative data of TEP recorded on the epidural surface of the rat with a platinum ball electrode. Materials & Methods : Under general anesthesia with urethane, the adult Sprague-Dawley male rats(300-350g) were given electrical stimulation with two stainless steel electrodes which were inserted into the subcutaneous layer of the area around whiskers. A reference electrode was positioned in the temporalis muscle ipsilateral to the recording site. Results : TEPs were recorded in the Par I area of somatosensory cortex and recorded most apparently on the point of 2mm posterior from the bregma and 6mm lateral from the midline. The typical wave form consisted of 5 peaks (N1-P1-N2-P2-N3 according to emerging order, upward negativity). Each latency to corresponding peaks was not influenced by the different intensities of stimulation, especially from 1 to 5mA. Average latencies of 5 peaks were in the following order ; 7.7, 11.1, 15, 22.3, 29.4ms. There was also no significant difference between latencies before and after administration of muscle relaxant(pancuronium). For the electrophysiological localization of recorded waves, the action potential of a single unit was recorded with glass microelectrode(filled with 2M NaCl, $3-5M{\Omega}$) in the thalamus of rat. A sharp wave was recorded in the VPM nucleus, in which the latency was shorter than that of N1. This suggests that all 5 peaks were generated by neural activities in the suprathalamic pathway. Conclusion : In terms of recording near-field potentials, our data also suggests that TEP in the rat may be superior to other SSEPs. In overall, these results may afford normative data for the studies of supratentorial lesions such as hydrocephalus or cerebral ischemia which can have an influence on near-field potentials.

골다공증성 척추체 압박골절에 대한 경피적 척추성형술시 자기공명영상과 골 주사 검사의 의의

김세혁,이완수,서의교,신용삼,장호열,전평,Kim, Se Hyuk,Lee, Wan Su,Seo, Eui Kyo,Shin, Yong Sam,Zhang, Ho Yeol,Jeon, Pyoung 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.7

Objective : Percutaneous vertebroplasty is often complicated by the presence of multiple fractures or non-localizing pain in the patients with osteoporotic vertebral fractures. The purpose of this study is to estimate the value of preoperative radiologic studies in the localization of symptomatic vertebrae and to determine the factors which can influence on the clinical results. Materials and Methods : We retrospectively reviewed the clinical and radiologic data of 57 vertebrae in 30 patients underwent percutaneous vertebroplasty for osteoporotic vertebral compression fractures. Inclusion criteria was severe pain(McGill-Melzack score 3, 4 or 5) associated with the acute vertebral fractures and absence of spinal nerve root or cord compression sign. Acute symptomatic vertebral fracture was determined by the presence of signal change on MR images or increased uptake on whole body bone scan. Results : Pain improvement was obtained immediately in all patients and favorable result was sustained in 26 patients(86.7%) during the mean follow-up duration of 4.7 months(5 complete pain relief, 21 marked pain relief). Those who underwent vertebroplasty for all acute symptomatic vertebrae had significantly better clinical result than those who did not. Further vertebral collapse and eventual bursting fracture occurred in 1 vertebra which showed intradiskal leakage of bone cement and disruption of cortical endplate on postoperative CT scan. Conclusion : Preoperative MR imaging and whole body bone scan are very useful in determining the symptomatic vertebrae, especially in the patients with multiple osteoporotic vertebral fractures. To obtain favorable clinical result, the careful radiologic evaluation as well as clinical assessment is required. Control of PMMA volume seems to be the most critical point for avoiding complications.

유전 및 환경요인이 한우 거세우 도체 등급에 미치는 영향

김세혁,김태균 한국농업경제학회 2019 農業經濟硏究 Vol.60 No.1

The purpose of this study is to estimate the effects of genetic and environmental factors on the carcass grade of Hanwoo steers. The data of 38,886 Hanwoo steers slaughtered from 2015 to 2016 were used. A bivariate ordered probit model was used to consider the endogeneity between meat quality and meat quantity grades. The results indicate that the meat quality grade was higher in autumn than in summer, and higher in clustered region than in non-clustered region. In addition, as the expected progeny difference of marbling score increased, the meat quality grade increased. As carcass weight increased, the meat quality grade increased, and as rearing period increased, the meat quality grade increased, whereas the meat quantity grade decreased. The results also indicate that the meat quantity grade was higher in spring and lower in autumn and winter than in summer. The meat quantity grade decreased when expected progeny difference of back-fat thickness increased, whereas the meat quantity grade increased when expected progeny difference of eye-muscle area increased. The results of this study may contribute to the government’s Hanwoo production policies and provide useful information regarding Hanwoo feeding for improving farmers’ income.

여행비용법을 이용한 평창 산지축산 체험관광의 수요와 편익 추정 :단일 및 다목적지 여행 비교

김세혁,김태균 대한관광경영학회 2018 觀光硏究 Vol.33 No.1

The purpose of this study is to estimate the demand and benefits of pasture experience tourism in Pyeongchang, Gangwon-do and compare the difference of single and multi-destination trips. 438 questionnaire survey data were used the travel cost method by truncated negative binomial model. The price elasticities of single and multi-destinations were –2.15 and –0.81, respectively, indicating that single-destination travelers were more sensitive to travel cost than multi-destination travelers. The consumer benefits per trip were estimated to be 45,653 Won for single-destination trip and 157,759 Won for multi-destination trip. Therefore, it is necessary to consider the trip type according to the number of destinations to estimate the demand and benefits of experience tourism. The results of this study may provide useful information in order to invigorate the mountainous pasture. 본 연구의 목적은 강원도 평창의 산지축산 체험관광의 수요와 편익을 추정하고, 단일 및 다목적지 여행의 차이를 비교하는 것이다. 이를 위하여 평창의 산지축산 체험목장을 대상으로 설문조사를 실시하였고, 수집된 438개의 자료를 이용하여 분석하였다. 분석방법은 여행비용법을 이용하였으며, 절단된 음이항 분포 모형을 사용하였다. 분석결과 여행비용이 적을수록, 남성이 여성보다, 기혼자가 미혼자보다 산지축산 체험목장을 방문할 확률이 높은 것으로 나타났고, 여행비용이 체험목장 방문확률에 미치는 영향은 단일목적지보다 다목적지의 경우가 더 작은 것으로 분석되었다. 산지축산 체험관광에 대한 수요분석에서 단일 및 다목적지의 가격탄력성은 각각 –2.15와 -0.81로 나타나 단일목적지 여행자들이 여행비용에 더 민감하게 반응하는 것으로 나타났으며, 여행 1회당 소비자편익은 단일목적지일 때 45,653원, 다목적지의 경우 157,759원으로 추정되었다. 이 연구결과는 산지축산 활성화의 기초자료로 사용될 수 있으며, 체험관광 수요와 편익은 여행형태에 따라 차이가 난다는 것을 감안해야 할 것이다.

순위로짓모형을 이용한 중국 쌀 수출 목표 소비자 설정 -서안시를 중심으로-

김세혁,임청룡,이항아,오윤미,채홍기,오상헌,김태균 한국국제농업개발학회 2017 韓國國際農業開發學會誌 Vol.29 No.4

The purpose of this study is to identify target consumers to expand the export of Korean rice to China. We used the ordered logit model as the analysis method and conducted a survey on 637consumers living in Xi'an, China from September 13, 2016 to September 30, 2016. The results indicate that the target consumers could be set as those who less amount of rice per purchase, more purchaseexperience of Korea rice, and have lower age. Also, people who are watch korean dramas more or listen to K-pops more tend to buy Korean rice more. Therefore, it is required to maximize the export performanceby selecting the young and interested in Korean Wave as the target consumer for the effective export of rice to the Chinese market. 한국산 쌀의 대중국 수출을 위한 연구결과를 요약하면 다음과 같다. 1. 중국의 벼 재배면적과 생산량 모두 증가추세이며, 자포니카 쌀의 재배면적과 생산량도 증가하는 추세이다. 또한 앞으로 자포니카 쌀의 재배면적과 생산량이 일정한 수준까지 증가할 것으로 예측된다. 2. 중국의 쌀 수출은 감소추세이며, 수입은 증가추세이다. 중국은 2010년까지는 쌀 순수출국이었지만, 2011년부터 순수입국으로 전환되었다. 특히 2011년부터 수입이 급격하게 증가하였다. 3. 중국 내 쌀 시장은 인디카 쌀의 생산국인 베트남, 파키스탄, 태국의 시장점유율이 98%로 나타나, 이 세 국가가 시장을 주도하고 있다. 반면에 자포니카 쌀 생산국(일본, 대만, 미국, 한국)의 시장점유율은 미미하다. 4. 시장점유율이 높은 베트남, 파키스탄, 태국의 수출경쟁력이 높으며, 반면 자포니카 쌀의 생산국인 일본, 대만 그리고 미국은 수출경쟁력이 낮다. 한국도 지속적으로 낮은 쌀 수출경쟁력을 보이고 있다. 그러나 고품질 쌀인 자포니카 쌀에 대한 수요 증가가 예측되며, 이는 한국 쌀 수출에 긍정적으로 작용할 것이다. 5. 회당 구매량이 적을수록 또는 연령이 젊을수록 한국산 쌀의 수용의사도 높게 나타난다. 과거 한국산 쌀 구매경험이 있는 응답자가 구매경험이 없는 응답자에 비해 한국산 쌀을 구매할 확률이 더 높게 나타난다. 또한 한국 드라마를 많이 볼수록, 또는 K-pop을 많이 청취할수록 한국산 쌀의 수용의사가 높다. 6. 한국 쌀의 목표 소비자는 회당 쌀 구매량이 적고, 과거 한국산 쌀의 구매경험이 있는 소비자, 젊고 한국 드라마와 Kpop을 즐기는 소비자로 설정하는 것이 바람직하다. 7. 한국 드라마와 K-pop 등 한류를 이용한 마케팅 전략 수립이 필요하다. 예를 들어 현지 소비자가 접할 수 있는 인기 한국 TV 프로그램에 한국산 쌀을 노출함으로써 홍보효과를 극대화할 수 있다.

외상성 뇌동맥류

김세혁,윤수한,주진양,김동익,최중언,이규창 대한신경외과학회 1993 Journal of Korean neurosurgical society Vol.22 No.12

Five cases of traumatic intracranial aneurysm were presented. All of them were located at the cavernous segment of the internal carotid artery. These lesions were associated with basal skull fracture. Four cases were presented with massive epistaxis, and two of them required transfusion. All cases were treated successfully: four by detachable balloon occlusion of the proximal internal carotid artery and one by trapping of the lesion at the internal carotid artery. Because the mortality rate of ruptured traumatic aneurysm is high, clinical suspicion must be focused on prompt diagnostic work-up and early treatment.