A Study on Project and Application for Ubiquitous Computing

Yi, Cheon hee 청주대학교 산업과학연구소 2005 産業科學硏究 Vol.22 No.3

Ubiquitous Computing은 우리에게 더욱 친근해지고 사람들의 일상생활에 더욱 접근하여 생활환경을 진보시키며 일들을 더 빨리 진행시키거나 또는 어떤 일들을 자동적으로 수행시키기에 이르렀다. C 컴퓨터의 존재는 사람들에 기인한다. 왜냐하면 사람들이 그것을 창조하였고 또한 그것을 사용하기 때문이다. 컴퓨터와 그것의 기술은 사람들의 필요에 의해서가 아니라면 아무런 의미를 지니지 못한다. 우리가 Report나 편지 등의 문서를 작성하기 위해 Word Processor를 사용하는 것처럼 컴퓨터에 직접 기인할 때, 그것으로부터 직접 도움을 받게 되며, Computer Processing작업을 함으로써 이익을 얻게 된다. 또한 연결이 분명하지 않을 때에는 간접적으로 도움을 받는다고 할 수 있다. 예를 들면 약간의 IEEE 논문들의 제공은 - 어떠한 것을 제작함에 있어서 컴퓨터의 도움으로 그 노력을 감소시키기 때문에 - 컴퓨터에 기인하는 유용함이라 할 수 있다. Ubiquitous Computing comes up to us and it enters people's lives more and more as they get better and we perform certain tasks faster with them, or can perform certain tasks automatically. The existence of computers is due to people because people created them and people are using them. computer technology and computers probably wouldn't have a meaning in whatever they do without people's needs for them either directly or indirectly. We may benefit from computers directly when their benefits are directly due to them such as using a word processor to accomplish our tasks(e.g. writing a report or paper), while we can benefit indirectly when we eventually get benefits due to having computers processing tasks for us but the connection is not that obvious. For instance, some papers IEEE offers are useful due to computers because with the help of computers certain tasks in production require less effort

소화기 Behcet병: 13예의 임상분석

정희원,유빈,문희범,이인철,김병식,박건춘,김진천 대한대장항문학회 1995 Annals of Coloproctolgy Vol.11 No.1

뇌졸중 환자의 경직 감소를 위한 경피적 전기 신경 자극술과 침술의 효과

백천호,소성욱,김희상,안경회,남상수,박선구 大韓再活醫學會 1997 Annals of Rehabilitation Medicine Vol.21 No.6

酸化마그네슘에 의한 燐酸이온의 吸着特性에 關한 硏究

천재기,이희동 釜慶大學校 1997 釜慶大學校 論文集 Vol.2 No.2

One of the rising problems in the field of water environmental is the eutrophic phenomenon which appears in the closed water basin. This study is for the removal by adsorption of orthophosphate which is indispensible nutritive element for eutro-phication. Magnesium oxide and magnesium oxide-activated carbom complex have been made and used as adsorbents. They have showed excellent adsorptivity for orthophosphate. The main purpose of this study is to obtain the optimum preparation comditions of adsorbents, the optimum operational conditions and basic data for the design of adsorption process for fixed bed adsorption in the case of adsrptive removal of orthophophate by the two adsorbents mentioned above.

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

백서 뇌의 정상 노화와 병적 노화 과정의 조직학적 차이 및 약물효과

전진숙,한호성,장희경,길영기,김순옥 대한생물치료정신의학회 1997 생물치료정신의학 Vol.3 No.1

Objectives : Besides of malnutrition and neurotoxic effect of alcohol on the prefrontal cortex or subcortical structures, premature aging may be involved in alcohol-induced cognitive disorders. The aims of this study were to evaluate the effect of alcohol on short-term memory function and histology, and to identify the drug responses and an association with aging process to understand a biological mechanism underlying alcoholic dementia. Methods: In experiment 1, T-maze tests were done in 5 aged controls and 5 atropine-treated rats. In experiment 2, T-maze tests were repeated on every week for a month in 5 normal adult and 5 ethanol-treated rats. In experiment 3, T-maze tests were repeated on every week for a month in seven groups of 5 ethanol-treated rats injected with normal saline, fluoxetine, bromocriptine, bethacholine, nimodipine, clonidine and ketamine. After completion of behavioral tests rats were sacrificed by the intracardiac perfusion with phosphate buffered 10% formaldehyde solution, and the brain specimen was stained with hematoxylin-eosin to count cells in prefrontal cortex and hippocampus. Results: 1) Cell numbers of hippocampus(CA1, CA3 and dentate gyrus) and prefrontal cortex were reduced in ethanol-treated rats(P<0.05) without significant changes on T-maze tests. 2)Cell numbers of hippocampus(CA1, CA3 and dentate gyrus) and prefrontal cortex were recovered by bethacholine(P<0.05), while those of hippocampus raised by bromocriptine and clonidine(P<0.05 respectively). There were no significant changes on T-maze tests. 3) Cell numbers of prefrontal cortex in ethanol-treated rats were correlated with those of atropine-treated(r=0.977,P<0.001), and of normal aged(r=0.448, P<0.05) rats. Conclusions : Alcohol-induced memory disorder might be mainly related with cholinergic system as well as adrenergic or dopaminergic ones. Pathological aging process could be involved in a mechanism underlying alcoholic dementia.

Eisenmenger씨 증후군을 동반한 충수돌기염 천공에 의한 복막염 환자의 마취경험 : 증례보고

천경석,박천희,이철승,이철,안용미,최준석 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.3

Eisenmenger's syndrome includes any condition in which communication between the pulmonary and systemic circulation gives rise to pulmonary vascular disease causing a right to left shunt with peripheral cyanosis, It can occur with complex congenital cardiac malformations, such as septal defect and patent ductus arteriosus. We report a case of a 58-year-old woman with an emergency operation for peritonitis due to appendiceal perforation and Eisenmenger's syndrome secondary to large ventricular septal defect. We carefully performed balanced anesthesia with air-O₂-desflurane-remifentanil. She was transferred to the intensive care unit in intubated state postoperatively and discharged two weeks later without any complications.

호알칼리성 Bacillus sp. No. 4의 Cyclodextrin Glycosyltransferase에 의한 Glycosyl Sucrose의 생산과 저충치성 당으로서의 응용

손천배,유미경,김명희,문숙경 충남대학교부설 생명공학연구소 1992 생물공학연구지 Vol.2 No.-

Action of a cyclodextrin glycosyltransferase (CGTase) produce from alkalophilic Bacillus sp. No. 4 was studied in a solution containing starch and sucrose to prepare glycosyl sucrose syrup with good sweetness and antidecaying properties of teeth. In the initial stage of the reaction the CGTase produced cyclodextrin, however, the cyclodextrin disappeared and glycosyl sucrose was formed with the lapse of reaction time. The best proportion of sucrose to starch for prodution of glycosyl sucrose was about 1 : 1. The optimum pH and temperature of the coupling reaction was pH 6.0 and 60℃, respectively. Main composition of glycosyl sucrose syrup prepared with 20% starch and 20% sucrose was sucrose 18%, glucosyl sucrose (G_2F) 15.3% and amltosyl sucorse (G_3F) 11.3%. And glucose, maltose and maltotriose were produced very little. Smaller amounts of acid and insoluble glucan were formed in the syrup by Streptococcus mtans OMZ176 than in the sucrose. Therefore, the prepared glycosyl sucrose sucrose syrup is expected to prevent teeth from decaying.

Computer-Aided Design에 의한 Packaging 디자인에 관한 연구

李天熙 淸州大學校 1981 論文集 Vol.14 No.2

The recent technical advancements of printed wiring board design make the interconnecion density become higher and the designing cost of a digital system has become more expensive than that of its components. Therefore, an efficient automated design system of printed wiring boards is expected. In the assembly of such systems, PWB's are used very often to provide the necessary interconnection among circuit modules In this paper we describe the some kind of module placement method and routing system such as maze routing method, Line serch method, channel method.

Pullulanase를 생산하는 Aeromonas caviae No. S-76의 특성과 배양조건

손천배,김명희,이명자 충남대학교부설 생명공학연구소 1992 생물공학연구지 Vol.2 No.-

A bacterial strain No. S-76 which produced pullulanase powerfully was isolated from soil. The isolated bacterium was 0.4∼0.6×0.8∼1.4 ㎛ in size, gram negative, rods, motile and was identified as Aeromonas caviae by Bergey's manual of determinative bacteriology with various characteristics investigated. The highest yield of pullulanase of the strain was obtained by using the following medium: 1% pullulan, soluble starch or corn starch as a carbon sources and 0.5% yeast extract, peptone as nitrogen sources with an initial pH of 9.0. The optimal culture conditions for production of pullulanase were at 32℃ for 2 days.