자동차 냉각시스템 및 냉각 성능에 관한 실험적 연구

김진현,차경옥 明知大學校 産業技術硏究所 2002 産業技術硏究所論文集 Vol.21 No.-

Cooling is therefore normally achieved through a balance of rant and fan action. Coolant is used to cool the engine's radiator and turbocharger intercooler in order to provide suitable temperatures, which result in higher power, better fuel economy, improved emissions and extended engine life. There are a variety of cooling systems that can be used to accomplish this goal. More recently additional large heat loads hate been imposed and fan site had to be increased. To reduce the associated increase in noise and to achieve a better match for engine-drive fans between the cooling air flow under ram conditions and the heat load generated by the engine, various means were devised to modulate the fan's output, or to decouple th e fan from the engine. Present emphasis on improved fuel economy has created a new urgency to make cooling systems more compact and efficient. This paper studies the various conditions and analyze the heat exchanger's capabilities and cooling effectiveness for several air flowrates, based on a typical automotive engine.

대유행 인플루엔자(H1N1 2009)에서 신속항원검사 양성률

김영근,김효열,어영,전진경 대한감염학회 2010 감염과 화학요법 Vol.42 No.2

There are few datas on the diagnostic accuracy of rapid antigen test for pandemic influenza A (H1N1). We evaluated the performance of rapid antigen test for the diagnosis of pandemic influenza A (H1N1). During the period from 21 August 2009 to 20 September 2009, 451 patients with influenza-like symptom underwent the rapid antigen test (SD Influenza Antigen, Standard Diagnostics, Yongin, Korea) and real-time reverse transcriptase-polymerase chain reaction (rRT-PCR) at the same time. Rapid antigen test results were positive for 65 of 90 patients with the positive results for pandemic influenza A (H1N1) on rRT-PCR assay. The sensitivity of the rapid antigen test was 72.2% (95% CI, 61.8-81.1) and the specificity was 100% (95% CI, 99.0-100). The positive predictive value was 100% (95% CI, 94.5-100) and negative predictive value was 93.5% (95% CI, 90.6-95.8).

Elizabeth Bennet의 정신적 성장을 위한 Pride and Prejudice의 구도

김경진 건국대학교 1994 대학원 학술논문집 Vol.38 No.-

The heroines of Jane Austen´s novels are all young woman of marriageable age who experience difficulties in love and learn valuable lessons about human nature as they gain in self-knowledge: each novel ends happily with the heroine´s marriage to a man she truly loves in a union that is both a reward and measure of her growth. This thesis aims to examine how Austen´s plans to take her heroine through a course of psychological reformation require a certain event at a certain time so that the heroine´s attitude will be changed in Pride and Prejudice. In Pride and Prejudice, Elizabeth Bennet finally surrenders her ironic, superior detachment by marrying Darcy. Austen´s psychological scheme requires four steps. Elizabeth´s first step toward Pemberley is her rejection of Mr. Collins. The second episode is Elizabeth´s discovering the truth about Wickham. The third is the perverse meeting of Elizabeth and Darcy at Pemberley and the last, mortification about Lydia´s Sudden and unexpected elopement with Wickham Austen systematically elucidates, little by little, the psychological development of her heroine from, and toward, a definite and preconceived point. Indeed, her greatness partly lies here, in the scheme . The plan behind the novels therefore seems to me the essential feature of Austen´s art. All that is complex, subtle and wonderful in the novels with this, and never quite obliterates it. Thus, the thesis focuses on how Austen´s plan takes her heroine through a course of psychological reformation.

混合溶媒內에서 p-Nitrobenzyl Chloroformate의 아실화 反應에 관한 硏究

김정성,김성주,경진범 대구대학교 기초과학연구소 1997 基礎科學硏究 Vol.14 No.1

The Kinetics of the solvolysis of p-nitrobenzyl chloroformate in hydroxylic alcohol solvents and the methanolysis of this substrate in acetone have been studied by titrimetric method at several temperatures and over a wide range of methanol concentration. The values of the activation parameter were determined from rate constants. The products of this substrate were analyzed by GC in aqueous ethanol. The mechanisms of these reactions were also estimated from the extended Grunwald-Winstein equation and the isotopic effects in methanol. From these results, it could be estimated that the solvolysis of p-nitrobenzyl chloroformate have bimolecular addition-elimination mechanism. And the reaction of this substrate with methanol in acetone is mixed second- and third- order reactions for over-all reaction. The results are consistent with a bimolecular reaction, and are explained by tetrahedral intermediate mechanism.

인구 배아 연구의 윤리적 고찰

김진경 釜山大學校 師範大學 1999 교사교육연구 Vol.41 No.-

A dramatic development of biotechnology in the 20th century has greatly impa and is greatly impacting the whole order of the ecosystem including human life. Under this circumstance, studies of human embryo are emerging as a very controversial issue around the world. They are the matter of life value whose treatment is permitted or not permitted according to whether human embryo is considered as a living creature or not. With no clear determination of a moral position of human embryo, currently, the number of countries which permit studying the embryo, albeit limitedly, is increasing for lots of expected useful and beneficial results. Human embryo is certainly a living creature. It is our obligation to care for the creature as a moral being, although it may not be regarded as a moral actor. Such dignified living creatures must not be used as means for other purposes for any other reasons. In this sense, human embryo must not be utilized just for a number of social benefits which would be brought by its studies. Thus we are required to seriously discuss the life value of human embryo before determining whether studies of the embryo should be permitted or not. We could have more careful and responsible attitudes about the studies if we recognize the dignity of life and a moral position of human embryo.

울산광역시민의 불소배합세치제 사용률

김지영,이재화,박혜경,김은경,김진범 대한구강보건학회 2003 大韓口腔保健學會誌 Vol.27 No.1

Fluoride-containing toothpaste is one of useful tools to apply fluoride for prevention of dental caries. The purpose of this study was to survey the user rate of fluoride-containing toothpaste at home for the oral health education of the use of fluoride-containing toothpaste. Questionnaires about the use of fluoride-containing toothpaste were distributed to the children of primary middle schools and adults in Buk-gu(Northern District) of Ulsan Metropolitan City, Korea. Collected questionnaires from 374 primary school children, 505 middle school children and 161 adults were analyzed. All collected date were analyzed using the SPSS program. The obtained results were as follows; 1. 36 brands of toothpaste were being used at home. 29 brands contained fluoride and 9 brands were the toothpaste for children. 2. Among total respondents, 97.4% used the fluoride-containing toothpaste. 3. The user rate of fluoride-containing toothpaste were 97.9% among elementary school children, 97.2% among middle school children and 96.9% among adults. There was no significant difference among groups. 4. Among respondents using fluoride-containing toothpaste, SMFP-containing toothpaste were used by 90.9% of subjects, NaF;9.9%, combination of SMFP and NaF;0.1%. 5. Only 33.0% of respondents correctly knew whether they really used the fluoride-containing toothpaste or not.

산 처리가 상아질 접착에 미치는 영향

김영경,김성교,박진훈 大韓齒科保存學會 1993 Restorative Dentistry & Endodontics Vol.18 No.1

뇌수술 시 과호흡과 만니톨의 투여가 뇌혈류와 뇌산소대사에 미치는 영향

김지헌,김경식,문봉기,조경기,신용삼,이영주,김진수 대한마취과학회 2002 Korean Journal of Anesthesiology Vol.43 No.4

Background: There are therapies to lower intracranial pressure (ICP) including head elevation, hyperventilation, diuretics injection, intravenous mannitol, hypothermia, cerebrospinal fluid drainage, and cerebral resection in neurosurgical patients. However in recent reports, hyperventilation followed by mannitol administration may lead to cerebral ischemia. Therefore, we investigated the effect of 0.5-1.0 g/kg mannitol administration on jugular venous oxygen saturation (SjVO_2) and cerebral arterial-jugular venous oxygen content difference (AVDO_2) at PaCO_2 25-30 mmHg and 35-40 mmHg in patients undergoing neurosurgery. Methods: we studied 17 patients undergoing neurosurgery in the Ajou University Hospital. Anesthesia was induced with fentanyl, midazolam, thiopental, and vecuronium, and maintained with )_2-Air-Isoflorane, a continuous infusion of fentanyl, and vecuronium. Patients were divided into two groups. Group 1 (n = 10) which is PaCO_2 25-30 mmHg and Group 2 (n = 7) which is PaCO_2 35-40 mmHg by controlling ventilator. Measurements of SjVO_2 and AVDO_2 in following time intervals: Ⅰ = preinjection of mannitol, Ⅱ = postinjection 20 minutes of mannitol, Ⅲ = postinjection 40 minutes of mannitol were obtainde for each group. 0.5-1.0 g/kg mannitol was administered intravenously just at duramater opening. Results: Hemodynamics and hematologics were not significantly different among the two groups. SjVO_2 of each group are as follows; Group 1; Ⅰ (70.3 ± 8.1%), Ⅱ (66.3 ± 6.9%), Ⅲ (69.1 ± 7.9%) and Group 2; Ⅰ (78.6 ± 7.4%), Ⅱ (75.1 ± 8.1%), Ⅲ (76.0 ± 11.2%), Hyperventilation significantly decreased SjVO_2- AVDO_2 was not significantly different but SjVO_2 in Ⅱ was significantly decreased compared with Ⅰ and Ⅲ in Group 1 (20% patients). Conclusions: Mannitol produced a change of SjVO_2 during hyterventilation. Therefore, intravenous mannitol during hyperventilation should be given cautiously according to the patients status because it may cause cerebral ischemia in critical patients. (Korean J Anesthediol 2002; 43: 462~467)

CAN(Controller Area Network)을 이용한 조립셀(Assembly Cell)구현 및 시뮬레이션에 관한 연구

김진경,김대원 명지대학교 대학원 1999 대학원논문집 Vol.3 No.-

This paper analyzes the performance of network using CAN protocol according to the variation of factors, such as a number of nodes, transmission speed, transmitted data size and so on. The CAN protocol is generally known to be good characteristics of real-time, but it is not possible to guarantee the timing performance of lower priority messages. We show the difference of time-delay between simulations and practical experiments about real-time performance of lower priority messages. Also, we make a mathematical model of the CAN protocol and propose the concept of a message control loop. The proper number of nodes, transmission speed, and transmitted data size are obtained to build the most efficient network through simulation.

삼성동 은행나무공원 조성계획

김도경,이진민,조용철 경희대학교 디자인연구원 2005 예술· 디자인학연구 Vol.7 No.2

The purpose of this study is to provide basic data for making, operating and managing good golf practice place. So, we surveyed selection variable by questionnaire and analyzed selection variable by SPSS Windows Version 11. This study will give us qualitative evelopment of golf practice environment. This paper concludes with following points. First, Main customers were prospective golfer and people(management, professionalist, housewife) who have time and money to spare in their fories, and they usually came there with their friend or colleague. Facilities and practice environment to improve golf ability were main factors when they select golf practice place. Main purpose of going to golf practice place was to develop their golf ability. Second, The survey on the overall selection factor reveals that there are a significant difference according to gender, educational level, golf career, using time of driving range, using frequency of driving range, practicing time, using frequency of golf course, using purpose of driving range. And female in leisure factor, finishing high school in leisure factor, under six month(golf career) in leisure factor, (using time) pm 4-7 in popularly factor, (using frequency) more than sixth a week in ability improvement factor and less than once a week in leisure factor, (practicing time) over 3 hour in ability improvement factor, (using frequency of golf course) more than sixth a month in ability improvement factor and one or second a month in leisure factor, (using purpose) control fatness in popularly factor appear high selection reason value. Third, we measured selection reason value and user satisfaction value, the results can be summarized as follows. In selection reason, it appeared that help to improve golf ability and to practice golf variable was the largest value and help to train approach shot variable was the second value, and moderate prices in charge was the lowest value. Through this point, we can guess that pitching course user think that pitching course has positive thing to improve golf ability and to practice golf. Through the whole value, we can guess that something to improve golf ability is the best one among the selection reasons of pitching practicing course rather than charge, distance, friendship, and overall user satisfaction value appeared positive value as 3.67.