서울市內 人工 水泳場의 衛生學的 調査硏究

우세홍,구성회,김남천 서울保健大學 1985 論文集 Vol.5 No.1

기업의 배당정책 결정요인에 대한 실증연구 : -중국 상해증권거래소의 상장기업을 대상으로-

김천희, 최창훈, 우춘식 숭실대학교 2009 숭실경영연구 Vol.1 No.1

본 연구에서는 1998년부터 2007년까지의 기간에서 중국 상해증권거래소의 상장기업 중에서 표본의 선정방법에 따라 A주 기업 208개를 선정하여 어떤 재무요인이 배당정책의 결정에 영향을 미치는가를 분석하는데 연구의 목적을 두었다. 연구결과를 요약하면 다음과 같다. 첫째, 수익성을 대변하는 변수인 주당순이익의 회귀계수가 배당의 유형과 관계없이 유의한 양(+)의 값을 보임으로써 수익성이 배당정책에 양(+)의 영향을 미치는 것으로 나타났다. 둘째, 기업의 투자기회와 성장기회를 대변하는 변수인 M/B비율과 총자산증가율이 A주의 주식배당과 혼합배당정책에 유의한 양(+)의 영향을 미치는 것으로 나타났다. 투자기회가 많고 성장성이 높은 기업에서 많은 배당을 지급한다는 가설을 지지하는 증거를 발견할 수 있었다. 셋째, 전기배당률의 회귀계수가 A주의 현금배당과 혼합배당에서 유의한 양(+)의 값을 보임 으로써 배당의 안정성이 배당정책에 의미 있는 영향을 미치는 것으로 나타났다. 넷째, 배당의 잔여이론을 대변하는 부채비율과 가처분현금흐름 비율이 부분적으로 배당정책에 영향을 미치는 것으로 나타났다. 다섯째, 소유구조를 대변하는 국유주 비율, 법인주 비율과 유통주 비율에서는 일관된 결론을 얻을 수 없었다. 따라서 소유권구조가 배당정책에 의미 있는 영향을 미친다고 보는 데는 한계가 있는 것으로 판단된다. The purpose of this study was to analyze which financial factors had an affect on deciding divided policy. According to some sampling criteria, in the purpose of this study 208 firms from A shares are selected and the dividend and financial data from the Shanghai Stock Exchange were used. A multiple regression analysis were adopted to empirically test the major purpose of this study with cash dividend ratio, stock dividend ratio and mixed dividend ratio as dependent variables and with the identified some determinant variables as explanatory variables. The results are summarized as follows. First, the empirical tests showed that the earning per share had significantly positive relationship with dividend policy. The regression coefficient of the earning per share had positive value in all type of dividend group. According to this results, the companies with more profit tend to distribute more dividend. Second, M/B ratio and growth rate of total assets, representing firm's investment and growth opportunities significantly affected stock dividend policy from A shares firm. It was supported the residual theory of dividend policy was supported. Company had more investments and growth opportunities, the more dividend was paid. Third, the former dividend ratio has significantly positive relationship with cash dividend policy and mixed dividend policy in sample firms of A shares. It indicates that the stability of dividend has significant influence on dividend policy. Keywords: cash dividend, stock dividend, mixed dividend, residual theory of dividend stability of dividend

최단경로 알고리즘을 이용한 PCB 자동 배선에 관한 연구

우경환,김현호,이천희 청주대학교 산업과학연구소 2001 産業科學硏究 Vol.19 No.1

Routing region modeling methods for auto-routing system is used grid and non-grid methods Although physical elements are small, the grid method has disadvantage that decrease the auto-routing speed due to constraint with size of grid and board, which in it is increase memory size Shape based type(non-grid method) used region process type and the shape located in memory as a individual element, and this element consumed small memory due to unique data size In this paper we developed PCB(Print Circuit Board) auto-routing system using the auction algorithm method that 1) Could be reached by solving the shortest path from single original point to various destination, and 2) without any memory dissipation with the best speed. Also, the auto-routing system developed by Visual C++ in Window environment, and can be used in IBM Pentium computer or in various individual PC system

地下生活空間에 對한 環境衛生學的 考察

우세홍,이성호,김남천 서울保健大學 1983 論文集 Vol.3 No.1

키틴을 이용한 N-acetyl-β-D-glucosamine 생산과 키토산 제조를 위한 탈아세틸화 반응

이천우,김광 東亞大學校 1998 東亞論叢 Vol.35 No.-

The relationships between the concentration of alkali solution, reaction temperature, reaction time and deacetylation of chitin were studied for the preparation of chitosan. It was to prepare chitosan products varing from low degrees of deacetylation up to virtually 100%. The intermittent forced-neutralization product through the process deacetylated, called chitosan, was intermittently washed in water to neutrality without serious degradation of molecular chain. Thus it would be possible to prepare the highly deacetylated chitosan within the short period of time. Enzymatic hydrolysis of chitin to N-acetyl-β-D-glucosamine(NAG) is performed by a system consisting of two hydrolases : chitinase and chitobiase. The bacterium Serratia marcescens QMB 1466 highly produces chitinolytic enzyme (about 1㎎ per 1liter of medium). We have studied the effect of induction time on chitinase production in fermentation reactor under the optimum growth condition. Inoculumn time for the optimum induction time of the microorganism was 3hrs after it was cultured for 16hr. Using this optimals, the effect of substrates on the chitinase activity and the ratio of chitinuse/chitobiase winch produces the maximum quantity of NAG were studied in digestion batch reactor. As the ratio of chitinase/chitobiase was 30.03U/3.44U(9:1), the amounts of NAG was the highest, 3.0g/L.

金融의 再構築과 결제시스템의 발전

이천우 昌原大學校 社會科學硏究所 1995 사회과학연구 Vol.2 No.-

기관지천식 환자에서 Furosemide, Disodium cromoglycate 및 Heparin 흡입이 고장액 식염수 기관지유발검사에 미치는 영향

강천일,현상훈,남언정,김건우,윤종수,서영익,이종명,김능수 慶北大學校 醫科大學 1996 慶北醫大誌 Vol.37 No.3

목적 : 기관지천식 환자에서 고장액 식염수의 흡입은 기도수축을 유발할 수 있으며 이는 운동유발성 천식반응과 밀접한 관계가 있는 것으로 알려져 있다. 저자들은 알레르겐 흡입이나 운동에 의해 유발되는 천식에 예방효과가 있는 것으로 알려진 disodium cromoglycate(DSCG), furosemide 및 heparin 흡입이 4.5% NaCl 기관지유발검사(BPT)에 미치는 영향을 조사하였다. 대상 및 방법 : 4.5% NaCl BPT에서 양성반응을 보이는 기관지천식 환자 13명을 대상으로 하였으며 사용된 약물은 furosemide 40㎎, DSCG 40㎎ 및 heparin 1,000μ/㎏이었다. 먼저baseline 4.5% NaCl BPT를 시행한 다음 이들 약물로 전처치후 다시 4.5% NaCl BPT를 시행하여 약물의 효과를 관찰하였다. 결과 : Furosemide 40㎎, DSCG 40㎎및 heparin 1,000μ/㎏의 흡입 전처치는 고장액 식염수에 의한 기도수축 반응에 뚜렷한 예방효과를 보였다. Furosemide와 DSCG로 전처치한 군(n=6)에서 이들의 기도수축 방어율은 각각 100.6±6.6%, 91.1±17.2%였으며 furosemide와 heparin으로 전처치한 군(n=7)에서는 각각 58.7±29.2%, 59.0±51.1%로서 각 군에서 이들 약제간의 방어율에는 유의한 차이가 없었다. 결론 : Furosemide(40㎎), DSCG(40㎎) 및 heparin(1000μ/㎏)의 흡입 전처치는 고장액 식염수에 의한 기도수축 반응에 뚜렷한 예방효과를 보였으며, 적어도 이 용량에서 기도수축 예방 정도에는 유의한 차이가 없음을 알 수 있었다. Background: Hypertonic saline (4.5% NaCl) inhalation is known to induce broncho-constriction by affecting mast cell, epithelial cell and vagal afferent pathway in some asthmatics. Disodium cromoglycate (DSCG) is known to have a preventive effect on allergic asthma and exercise induced asthma, and recently it was reported that furosemide and heparin had similar effect. The purpose of this study was to evaluate the effects of furosemide, DSCG and heparin on hypertonic saline provocation test in asthmatics. Methods: Thirteen asthmatics with a positive response to hypertonic saline challenge were enrolled. Hypertonic saline and test drugs were generated by ultrasonic nebulizer. After taking baseline 4.5% NaCl challenge, subjects were rechallenged with 4.5% NaCl after inhalation of furosemide 40㎎, DSCG 40㎎ or heparin 1,000μ/㎏. Results: 1. There was a significant positive relationship between PC_20-methacholine and PTM-4.5% NaCl(r=0.5575, p = 0.024). 2. Furosemide, DSCG and heparin had no direct bronchodilating effects. 3. Premedication of furosemide and DSCG(n=6) showed significant protective effects on 4.5% NaCl induced broncho-constriction. The average protection rate were 100.6±6.6% and 91.1±17.2%, respectively. 4. Premedication of furosemide and heparin(n=7) showed significant protective effects on 4.5% NaCl induced broncho-constriction. The average protection rate were 58.7±29.2% and 59.0±51.1%. respectively. Conclusions: Furosemide(40㎎), DSCG(40㎎) and heparin(1.000μ/㎏) had significant protective effects on hypertonic saline induced broncho-constriction in asthmatics, and there were no significant differences in their potency of protection rate.

미생물에 의한 Chitin의 가수분해에 대한 연구

이천우,김광 東亞大學校 1995 東亞論叢 Vol.32 No.-

Selection and optimization of a microbial host for chitinase/chitobiase production and secretion, Development, of fed-batch minimal-media fermentation system for high-density cultivation of host organism, Serratia marcescens, Optimization of indution protocal for high-level production and secretion of intact chitinase/chitobiase ensemble, Investigation of the influence of chitin source and pretreatment on chitinase/chitobiase production and NAG production, Development of an inexpensive method for chitin pretreatment which enhances NAG production and enzyme induction. This paper shows the level of chitinase production as a function of fermentation/induction time in a fed-batch system induced at late exponential phase growth with that in the control fermentation where chitin alone sreves as the carbon source. Induction at early stationary-phase growth leads to little chitinase production, indicating that the cells are stressed to the point where they no longer accept chitin as a carbon source. Substrate pretreatment has a strong influence with NAG production rates being highest for swollen crab-shell chitin. Thus the optimal pretretments for induction of chitinolytic enzymes in S.marcescens cultures and NAG production by enzymatic hydrolysis are similar but not identical. Action of the crude enzyme solution on chitin appears to yield only NAG at all stages of hydrolysis. Enzyme fractions, however, have been obtained which yield mostly the dimer of NAG. Thus, the system appears to involve both an endoglycanase(chitinase) and NAG (chitobase), making the chitinolytic-enzyme ensemble somewhat analogous to the cellulose system.

119 구급업무의 정책논쟁분석

우성천 한국화재소방학회 2000 한국화재소방학회지 Vol.1 No.2

지난 몇 년 전부터 삼풍백화점 붕괴사고, 씨랜드 참사사고, 인천호프집 화재사고 등 대형사고가 국내외에서 번번히 발생되었다. 화재사고, 가스폭발사고, 교통사고, 산악사고, 각종질병 등 많은 사고가 발생할 때마다 국민들은 119 구급서비스를 원했던 결과 작년 한 해만 해도 일일 평균 2,608명을 구급처치하고 가까운 병원으로 이송하였다. 그러나 양질의 구급서비스를 제공하여 국민의 귀중한 생명을 구조하고 보호하여야 하는 119구급대원이 행할 수 있는 응급 처리를 하거나 단순 이송만으로 소임을 다하는 사례가 있을 수 있어 차제에 119구급 대원이 행할 수 있는 응급 구조사의 업무제한은 마땅히 완화(응급구조사가 구급차 및 장비를 이용해서 응급처치를 행할 경우에 한하여)내지 폐지(선진국의 대부분 나라에서도 응급 구조사의 업무범위내에서 응급처치만 실시함)되어야 한다고 제안한다. Since a few years ago, great disasters have often took place in domestic and abroad, such as Sampoong Department store collapse, Sea-land disaster accident, Incheon Hof fire accidents. Whenever a lot of accidents occurred such as fire, gas explosion, traffic accident, mountain accident, various disease, people required 119 first aid service. As the result, even for the last year, average 2,608 person per day were temporary treated and carried to near hospital by 119 system. But first-aid team or first grade EMT(emergency medical technician) that should provide high quality service and save important lives, might have negatively treated or made their duty only for simple transfer, when they were imminent of emergency case in every kind of accident spot. Because they worried about medical dispute for "task restriction for EMT" decided by medical lows or rules of first aid. So it was proposed that "task restriction for EMT" should be mitigated or released in the possible range on this occasion.

골판지상자 제조과정에서 화상처리를 이용한 실시간 마-크코-드 인식

신천우,김태효 慶南大學校 附設 工業技術硏究所 1994 硏究論文集 Vol.12 No.-

골판지상자의 제조에서, 골판지를 상자모형으로 프레스하는 공정이 기계의 진동이나 편차에의하여 골판지의 위치가 어긋나는 경우가 있다. 그러므로 골판지상자 제조에서 골판지의 위치인식이 중요한 포인트가 되며, 이를 실현하기 위하여 화상인식처리를 이용한 소형의 실시간 위치인식 시스템을 구현하고 시험하였다. 실험은, 제조공장의 기기에 설치하여 행하였으며, 골판지의 종류와 밝기, 마-크 코-드의 색상과 밝기 및 단일광원에 대한 골판지의 명도분포등을 측정하였다. In manufacture of corrugated cardboard boxes, the corrugated cardboards are generally cut according to the shape of box by a pressing machine. It is possible to have position error of the corrugated cardboards due to some mechanic vibrations or deviations. Therefore, to recognize the position of them is the main point, In order to realize it, the small and real-time recognition system was realized and tested. The test was practrically proceeded in a factory. In the test, the luminance variation due to some kinds of corrugated cardboards and the mark codes with different colors, and the brightness distributions of the boards by the single light source were measured.