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우리나라 기업의 자본구조에 관한 연구: 절충이론과 순서이론의 비교
구본일 ( Bon Il Ku ),엄영호 ( Young Ho Eom ),전효찬 ( Hyo Chan Jeon ) 한국금융연구원 2008 한국경제의 분석 Vol.14 No.2
A large volume of empirical research have been devoted in distinguishing the dominance between the trade-off theory and the pecking-order theory in explaining corporate capital structure. The research has been developed in two stages. In the first stage, various firm characteristic variables were tested to find out their explanatory power on the optimal capital structure. In the second stage, relative strength between (a)the gap between the target and actual debt-equity ratio and (b) the amount of financial deficit was tested in explaining the behavior of corporate financial structure. This paper is one of this line of research applied to companies listed in the Korea Stock Exchange except those belonging in the financial sector. The result shows that variables representing the trade-off motivation and the pecking-order motivation both have explanatory power, but with stronger result for supporting the trade-off theory. Test of the target adjustment model produced high adjustment speed, which was a strong evidence in favor of the trade-off theory. The amount of financial deficit was found to have some explanatory power for the behavior of debt-equity ratio of large and chaebul firms, but not of small and non-chaebul firms.
벼 2기작 재배를 위한 조기재배 환경에서 벼 생육 및 수량변화
구본일 ( Bon Il Ku ),최민규 ( Min Kyu Choi ),강신구 ( Shin Ku Kang ),박태선 ( Tae Seon Park ),김영두 ( Young Doo Kim ),박홍규 ( Hong Kyu Park ),고재권 ( Jae Kwon Ko ),이변우 ( Byun Woo Lee ) 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.5
This study was carried out to evaluate the possibility of rice double cropping in Korea by assessing the growth and yield performance of rice cultivars transplanted at the extremely-early date. When the transplanted rice seedling was exposed to low temperature below 0oC, the survival rate decreased drastically. However, short exposure to below 0oC one or two times did not damage transplanted rice seedling so severely. Thus, the earliest transplanting in spring would be possible when minimum temperature rises above 0oC. Compared with the conventional seedling nursery tray (CSNT), seedling rearing with the potted nursery tray was more effective for increasing leaf age and seedling dry weight during nursery period. In the first rice cropping, rice cultivation with seedlings reared in PSNT showed shorter growth duration and cumulative temperature from transplanting to heading than that with seedlings reared in CSNT. The earliest heading date on July 4 in Jinbuolbyeo was earlier by two to three days than that of Dunaebyeo. If rice has not exposed to cold damage, the earliest heading date of Jinbujolbyeo can advance to June 30 or July 1. In this case, rice harvest would be possible on August 5, enabling the rice transplanting of the second rice cropping before August 10. At transplanting time with low temperature damage rice yield were less than 400 kg/10a while rice yield exceeded 400 kg/10a at transplanting time without low temperature damage.
기후변화에 대비한 한국에서 벼 2기작 재배에 관한 연구
구본일 ( Bon Il Ku ),강신구 ( Shin Ku Kang ),상완규 ( Wan Gyu Sang ),이민희,박홍규 ( Hong Kyu Park ),김영두 ( Young Doo Kim ),이점호 ( Jeom Ho Lee ) 전북대학교 농업과학기술연구소 2014 농업생명과학연구 Vol.45 No.1
This study was carried out to evaluate the possibility of rice double cropping in Korea by assessing the growth and yield performance of rice cultivars transplanted at the extremely early and late dates. When transplanted rice confront with low temperature below 0℃, the survival rate decreased drastically, so we can judge that earliest transplanting was possible when low temperature escape from 0℃. Heading date, July 4, of Jinbuolbyeo was faster 2~3 days than those of Dunaebyeo. If rice has not get cold damage, the earliest heading date of Jinbujolbyeo can advance to June 30 or July 1. Therefore, it can be possible to harvest on August 5 after heading on later June or early July, and to transplant on August 10. But if transplanting delayed until August 10, the yield of second rice cropping decreased drastically owing to low temperature during ripening stage. In second rice cropping from late July to early August, ripening were relatively good until transplanting on August 5. So we can judge transplanting of second rice cropping should be performed before this season. In transplanting on July 30, cumulative temperature between heading and first frosting was 853°C and ripening was in appropriate level, but in transplanting on August 10, heading was delayed by low temperature, so ripening was finished below 800℃ and rice yield decreased drastically. For appropriate ripening and rice yield, it is necessary that cumulative temperature of ripening duration between heading and first frosting is over 800°C. In transplanting of second cropping, the heading time were located in middle 10 days of September, so we can presume that rice double cropping is possible in regions which have more ripening temperature over 800℃ from middle 10 days of September. The regions in which ripening is possible in heading on September 10 were Jeju island, plain area of Jeonnam and Kyungnam province and some plain area of Jeonbuk province. In this region, we should review comprehensively the possibility of rice double cropping and other cropping system with another crops to increase income and productivity of land.
벼 품종간 엽 생장속도 차이가 생육 및 수량에 미치는 영향
구본일 ( Bon Il Ku ),강신구 ( Shin Ku Kang ),상완규 ( Wan Gyu Sang ),이민희,박홍규 ( Hong Kyu Park ),김영두 ( Young Doo Kim ),이점호 ( Jeom Ho Lee ) 전북대학교 농업과학기술연구소 2014 농업생명과학연구 Vol.45 No.1
This experiment was conducted to compare emergence rate on main culm leaf among cultivars having similar heading date and to evaluate the effects of leaf emergence rate on growth and yield of rice. During 2009~2011, five early maturing rice cultivars(Unbong, Namweon, Jinbu, Unkwang and Sangju), four middle maturing rice cultivars(Seojin, Ganckeok, Hwayeong and Kwangan) and four middle-late maturing rice cultivars(Daecheong, Ilpum, Ilmi and Nampyeong) were transplanted at three different dates from May 16 to June 15 in Iksan region. Number of leaf emerged on main culm increased as heading date delayed, but some rice cultivars having similar heading date showed noticeable difference in emerged leaf number. In transplanting on May 16, the early maturing cultivar, Jinbu, had 1.2 leaf more than Unbong which had similar heading date. Similarly middle maturing cultivar, Kwangan, had 1.6 and 1.4 more emerged leaf than Hwayoung and Gancheok, respectively. As transplanting date delayed, leaf number emerged on main culm decreased in general dates, but some cultivars get increased leaf number in late transplanting dates. Consequently, it was difficult to get a constant rate in leaf number corrected with transplanting date. Cultivars having more emerged leaf number generally had increased dry weight at heading stage, and it is postulated that the increase in dry weight was more contributed by prolonged growth duration than by leaf emergence rate. In transplanting on May 16, early maturing cultivars, Unbong, Namweon and Jinbu showed significant yield decrease compared to yield in transplanting on June 15 because of high temperature during ripening stage, but Unkwang showed least reduction in yield. In transplanting on June 15, middle-late maturing cultivars, yield of Daecheong showed significantly reduced compared to that in transplanting on June 1 because of low temperature during ripening stage, but Ilmi and Nampyeong showed slight reduction in yield.
박현,구본일,오상준,이홍섭,김창호,Park, Hyun,Ku, Bon-Il,Oh, Sang-Joon,Lee, Hong-Sup,Kim, Chang-Ho 대한흉부심장혈관외과학회 1995 Journal of Chest Surgery (J Chest Surg) Vol.28 No.3
Between September, 1987 and March, 1994, 11 patients were treated for the pulmonary aspergilloma.The mean age was 59.6 years. Hemoptysis was the most common chief compliants[100% .Postoperative pathology showed bronchiectasis and tuberculosis were most common underlying diseases.Operative procedures were wedge resection in one patient, segmentectomy in 2, lobectomy in 7. One patient treated conservative.In 3 patients, the postoperative air leakage persisted longer than after other pulmonary resectional surgery.There was no postoperative death. The surgical resection is strongly recommended when the patient develops hemoptysis.
박현,구본일,오상준,이홍섭,김창호,Park, Hyun,Ku, Bon-Il,Oh, Sang-Joon,Lee, Hong-Sup,Kim, Chang-Ho 대한흉부심장혈관외과학회 1995 Journal of Chest Surgery (J Chest Surg) Vol.28 No.3
Two hypertensive men with DeBakey type III dissection were admitted due to acute onset of leg ischemia.One patient had ischemia of both legs,The other patient had ischemia of the right leg.Angiograms showed occlusion of aortic bifurcation in one patient and occlusion of right common iliac artery and right renal artery in the other patient.The first patient who had ischemia of both legs was relieved by axillo-bifemoral bypass operation and the second patient with right leg ischemia by femoro-femoral bypass.The dissection of the aorta was successfully managed by conservative measures including hypotensive medication.The bypass grafts was functioning well one year later.The aortic dissection should not be overlooked as an etiology of acute onset of ischemia of the lower extremities.
박현,강종렬,구본일,박용원,오상준,이홍섭,김창호,Park, Hyun,Kang, Jong-Ryul,Ku, Bon-Il,Park, Yong-Won,Oh, Sang-Joon,Lee, Hong-Sup,Kim, Chang-Ho 대한흉부심장혈관외과학회 1995 Journal of Chest Surgery (J Chest Surg) Vol.28 No.3
A 31-year-old man was admitted due to dyspnea on exertion[NYHA III-IV and general weakness.The echocardiographic findings reveal moderate secundum atrial septal defect and mitral stenosis.Mitral valve replaced through atrial septal defect and atrial septal defect closed by direct suture.Postoperative course was uneventful and discharged 2 weeks later.