EXPERIMENTS ON THE INTERACTION OF WATER SPRAYS WITH POOL FIRES

Han,Yong-Shik,Kim,Myung-Bae,Shin,Hyun-Dong 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-

A series of measurements and visualization to investigate the interaction of water sprays with pool fires is presented. Fire source is a small-scale pool burner with methanol, ethanol and gasoline. Measurements of temperatures, <TEX>$O_2$</TEX>, <TEX>$CO_2$</TEX>, and CO concentrations along the plume centerline are carried out to observe pool fire structures without water sprays. Visualization by the Ar-ion laser sheet shows flow pattern of droplets of the sprays above the pool fires. It is observed that in the case of methanol and ethanol, water sprays continuously penetrate into the center of fuel surfaces. The gasoline pool fire allows intermittent penetration of water sprays because of pulsating characteristics of the gasoline flame. To evaluate the cooling effect of the fuel surface by the sprays, the temperature was measured at the fuel surface. As soon as the mists reach the fuel surface of methanol and ethanol, the temperatures of the fuel surface decrease rapidly below the boiling point, and then the fires are extinguished. Due to the application of mist upon the gasoline fire, though the fuel temperature decrease abruptly at the time of the injection, such a rapid decrease do not continue till the extinction point.

자금재조달위험이 경영자 이익예측에 미치는 영향

유일한(Yu, Il-han),신상훈(Shin, Sang-hoon),유승원(Yoo, Seung-weon) 한국국제회계학회 2017 국제회계연구 Vol.0 No.72

본 논문에서는 자금재조달 위험이 경영자 이익예측에 미치는 영향에 대하여 연구하였다. 구체적으로 2004년부터 2014년까지 유가증권 상장기업의 경영자이익예측정보를 이용하여 자금재조달 위험이 경영자 이익예측의 편의에 미치는 영향에 대하여 분석하였다. 연구결과 첫째, 자금재조달 위험이 경영자 이익예측의 낙관성에 영향을 미치는 것으로 나타났다. 자본시장을 통한 자금재조달을 앞둔 경영자는 자본비용의 감소를 위해 기업의 미래성과를 낙관적으로 조망함으로써 긍정적인 시장의 전망을 유도할 유인이 있는 것으로 보인다. 둘째, 현금 보유비율이 낮은 기업일수록 경영자가 이익예측을 낙관적으로 할 가능성이 더 큰 것으로 나타났다. 자금재조달을 앞두고 충분한 현금을 보유하고 있는 회사의 경우 그렇지 않은 회사에 비해 자금재조달 시에 발생 가능한 여러 위험에 보다 유연하게 대응할 수 있다. 따라서 현금 보유비율이 높은 기업의 경우 경영자들에게 낙관적 이익예측을 통해 시장의 긍정적인 반응을 유도할 유인이 줄어드는 것이다. 이는 현금 보유비율이 높이는 것이 자금재조달 위험을 낮추는 방편 중 하나가 될 수 있다는 선행연구(Jarrad Harford 2014)와도 일관된 결과이다. 본 연구는 자금재조달 위험이 기업 영업에 중요한 논제임에 비해 국내 연구가 미진한 현 상황에서 자금재조달 위험이 경영자의 이익조정 뿐만 아니라 이익예측 관련 공시 정보에도 영향을 미칠 수 있음을 입증하였다는 점에서 의의가 있다. 또한 자금재조달 위험에 따른 경영자들의 이익예측 편의는 경영자들의 기회주의적 면모를 재조명한 것으로 볼 수도 있다. 나아가 본 논문은 현금보유 수준에 따라 경영자 이익 예측 성향이 달라질 수 있음을 입증하며 자금 대여자들의 의사결정에 필요한 시사점을 제공하리라 생각한다. In this paper, we investigate the effect of fund re-financing risk on managerial earnings forecast. Specifically, from 2004 to 2014, we analyzed the effects of the risk of refinancing of funds on the convenience of managerial earnings forecasts using information on managerial earnings forecasts of listed companies. The results of this study are as follows: First, the risk of refinancing affects the optimism of managerial earnings forecast. Management seems to have an incentive to induce a positive market outlook by optimizing the future performance of the company in order to reduce capital costs. Second, the lower the cash holding ratio, the more likely the manager is likely to be optimistic about earnings forecasts. Companies that have sufficient cash ahead of their refinancing can respond more flexibly to the risks that may arise when refinancing funds compared to non-cash companies. Therefore, for firms with high cash holdings, the incentive to induce positive responses to the market through optimistic earnings forecasts is reduced. This is consistent with Jarrad Harford (2014), which suggests that increasing cash holdings can be one of the ways to lower the risk of refinancing. This study has proved that the risk of refinancing is influential not only on managers" profit adjustment but also on profit forecasting information in the current situation where domestic research is insufficient. In addition, managers" profit forecasting convenience due to the risk of refinancing of funds can be seen as a reexamination of opportunistic aspects of management. In addition, this paper proves that the propensity to predict earnings will vary according to the level of cash holdings and will provide implications for women"s decision making.

국내에서 보고된 사암침법에 대한 연구 동향

한창현(Han changhyun),신미숙(Shin misuk),박선희(Park sunhee),최선미(Choi sunmi) 한국한의학연구원 2006 한국한의학연구원논문집 Vol.12 No.2

Background The Saam's Acupuncture Method is one of the most widely adopted techniques used by clinicians and educational institutions in Korea today. It is originated in the 17th century from a Buddhist monk known as "Saam''. The reports on the bibliography, biological responses and therapeutic effects of Saam's Acupuncture method were done but trends on the Saam's Acupuncture method were insufficient. Objectives This study aims to review the bibliography, biological responses and therapeutic effects of Saam's Acupuncture. In the process, this review will grasp trends in this field of studies and will direct further researches into the right direction. Method We searched and investigated the journals supplied by Korean Oriental Medical Society and Je-Han Oriental Medical Academy homepage etc. with the key world "Saam(사암), jung-geuk(정격), seung-gyuk(승격), han-geuk(한격), yu1-geuk(열격)". Fifty journals were chosen for the review. Result 1. The proportion of basic researches was 10%. The biological responses of Saam's Acupuncture method reveal on blood pressure, regional cerebral blood flow (rCBF). 2. The proportion of literature researches was 48%. The application of Saam's Acupuncture method was many. 3. The proportion of case reports was 26%. Saam's Acupuncture method is applied in the various disease. 4. The proportion of clinical studies was 16%. Clinical studies were increased after the year 2000. Conclusions To elevated quality of studies, we needs well-designed experimental methods, efficient secure of experimental groups, appropriate statistical verification, accumulations of knowledges about data research.

강원도 화천군 수달(Lutra lutra) 서식지의 식생 구조

서형수 ( Hyung Soo Seo ),신영섭 ( Young Seob Shin ),이경은 ( Kyung Eun Lee ),김윤미 ( Yoon Mi Kim ),전미나 ( Mina Jeon ),남택우 ( Taek Woo Nam ),한성용 ( Sung Yong Han ),정연숙 ( Yeonsook Choung ) 한국하천호수학회 2014 생태와 환경 Vol.47 No.special

In order to determine whether vegetation would be one of the factors for the selection of otter home range, vegetation structure and other potential factors were studied in Hwacheon, Korea. Thirteen sites, otter’s activity found and not found, were investigated in North Han River and connected tributary streams of Hwacheon-gun. Three types of vegetation were classified by cluster analysis, which is short grass, tall grass and shrub type. Vegetation zone of each channel is composed of either one type, or mosaic of tall grass and shrub type. Short grass type is common in Lake Paro and upper North Han-river where water level is highly variable throughout a year. Therefore, annual species such as Persicaria nodosa, Fimbristylis dichotomam and Chenopodium ficifolium are the most dominant. Shrub type is common at the downstream sites of Jichon stream and along mainstream of North Han River down Lake Paro. A shrub species, Salix koreensis, is the most common. Tall grass type is dominant occupying the most vegetation zone of the tributary channels. Phragmites japonica is absolutely dominant. Due to its dense cover, a few plant species are co-existed. Otter activity was found in all three vegetation types and no marked activity was found at some sites of tall grass type. There is no difference in species composition and physiognomy between tall grass sites with and without otter activity, while it shows significant difference in fish availability between two groups. Overall we found that home range of otters in the region is along the mainstream and downstream of tributary streams with high fish availability in all vegetation types and in various human activity levels.

한강하구지역에서 월동하는 재두루미(Grus vipio)의 개체군 감소

이화수(Hwa-Su Lee),신주열(Ju-Yeol Shin),이시완(Si-Wan Lee),강태한(Tae-Han Kang),윤순영(Soon-Young Yoon),김정수(Jungsoo Kim) 한국조류학회II 2012 한국조류학회지 Vol.19 No.4

김포시와 고양시 일대의 한강하구 지역은 우리나라에서 재두루미의 가장 중요한 월동지 및 중간기착지로 알려져 있지만, 이 지역의 조류 서식환경은 심각한 개발압력과 인간의 간섭으로 인해 지속적으로 나빠지고 있다. 따라서 본 연구에서는 2007-2008년과 2011-2012년의 월동시기에 본 지역에 도래하는 재두루미를 대상으로 월동 개체군 크기 변화와 월동지역 내에서 과거와 현재의 취식지역 이용 현황 등을 조사하여 개발행위가 이들의 서식에 미치는 영향을 확인하였다. 본 지역에서 월동하는 재두루미 개체군은 평균 124.9개체(2007-2008년)에서 59.0개체(2011-2012년)로 감소하였으며, 주요 취식지역에서 확인된 개체수는 평균 77.7개체에서 24.1개체로 감소하여 월동개체군의 감소폭에 비해 주요 취식지역의 이용 개체수의 감소폭이 더 크게 나타났다. 유형별 분석에서는 가족군에 비해 무리군의 개체수가 많이 감소한 것으로 나타났으나, 홍도평 지역의 가족군 이용 개체수는 변화가 나타나지 않았다(Mann-Whitney test. Z=-0.26, p=0.979). 그리고 과거 다수의 재두루미가 주요 취식지역으로 이용하였던 송포동과 평동지역은 2012-2013년 조사에서는 거의 이용하지 않는 것으로 나타났다. 이는 위 지역의 개발행위(예: 제 2자유로 건설 등)와 깊은 연관성이 있는 것으로 생각된다. Han-river estuary in Gimpo and Goyang city is well known as one of the most important wintering and stopover sites for migrating White-naped Crane (Grus vipio) in Korea. Nowadays, habitat quality of this area is getting worse due to serious development pressure and high human disturbances. So, we wanted to know whether development actions affected total wintering population change in Han-river estuary and feeding group pattern of White-naped Crane in main feeding habitats between the 2007-2008 and 2011-2012 wintering period. Average wintering population was decreased 124.9 to 59.0 and population of main feeding site also decreased 77.7 to 24.1. But decrease rate of main feeding site population was higher than total wintering population. Non-family feeding population was more decrease than family feeding population in the flock type analysis. But family feeding population of Hongdopyong was maintained from past and present (Mann-Whitney test. Z=-0.26, p=0.979). However, almost all White-naped Crane din not use both feeding sites, Pyong-dong and Songpo-dong, where were deteriorated habitat quality by human act.

서울시의 재건축 추진현황에 대한 분석 : 관련 법령의 개정을 중심으로 Focused on the revision of the law related

한수진,박신영,윤영호 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(계획계)

The aim of this study is to offer the fundamental resources that would guide us for more stable reconstruction in future, using the method of analyzing the relation between present situation of reconstruction and the law the related to it. However, this also represents over 1,115 cases of reconstructions in the city of Seoul, as well as revision of the law that related after the year 1987 As the result of this analysis, in spite of the idea for reconstruction should be based on solving the deteriorated building, in Seoul's case, it was repeating instable of the reconstructions caused by revision of the law related that had influenced the great deal of business. Now, although on December of 2002, for more efficient management on the reconstruction business, the integrated law has passed, much more of analyses well as researches need to be done.

저압 증발하의 열교환 특성에 관한 연구

신유식,이윤환,서종수,전영흥,정효민,정한식 경상대학교 해양산업연구소 2002 해양산업연구소보 Vol.15 No.-

The purpose of this research is to obtain the characteristics of heat transfer or heat exchange under the vacuum pressure. The general heat transfer or heat exchange can be changed with the experimental environment. In this report, the exothermic calorie and endothermic calorie were measured under the vacuum chamber. These two kinds of calories show the evaporative and condensing sides, respectively, and these calories were measured by using the parameter with flow rate.

北韓의 外交政策

韓信愛 梨花女子大學校 法政大學 1967 法政學報 Vol.10 No.-

감염근관에서 분리한 Porphyromonas endodontalis와 Prevotella intermedia의 제한효소분석법에 의한 유전자 이질성에 관한 연구

신주희,김한옥,윤수한 大韓齒科保存學會 1997 Restorative Dentistry & Endodontics Vol.22 No.1

치근이개부 천공부위에 대한 수종수복재의 치유효과에 관한 조직병리학적 연구

신동훈,홍찬의,홍한표 大韓齒科保存學會 1995 Restorative Dentistry & Endodontics Vol.20 No.2