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임채문,권강훈,이주호,김태형 대구대학교 과학기술연구소 2001 科學技術硏究 Vol.8 No.1
This study suggested input variables whose effects have been considered by adjusting various input variables in the TRANSYT-7F and NETSIM, the Simulation programs employed in calculating the delay time at street sections. The results can be summarized as follow. 1. Among the input variables in the TRANSYT-7F needed to calculate the delay time at street sections, the excluded are those which effect the most on time delay, such as bus stops, pedestrian crossings and on/off ramps. Among the input variables the most affecting factors are Saturation flow rate and time delay whose suggested quotients are well summarized in the text of this study. 2. There are variables which affect the change of time delay in the NETSIM, such as bus stop, pedestrian crossing, bus appearance period, and departure time delay. This study did the Simulation program using those variables except pedestrian crossing because, as the result of the correlation analysis suggests, there is a strong correlation between bus stop and pedestrian crossing. In this study, the survey had been done in the morning and afternoon except the Peak time, so heavily congested sections were excluded. And both sides of three street sections were surveyed. Therefore, there should be further studies on heavily congested situations and many other street sections.
액체크로마토그래피/질량분석법을 이용한 랫트 혈장내의 Surfactin C의 정량법에 관한 연구
임종환,김명석,이동연,이상훈,백경진,김태원,정두순,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-
Surfactin isolated from Bacillus subtilis has a strong surface tension-lowering activity, together with antiviral, antitumor, fibrinolytic and hypocholesterolemic activities. LC/MS is a simple, rapid and effective technique for the determination of surfactin C in rat serum. The separation of surfactin was achieved on reverse phase column. The mobile phase consisted of 0.1% trifluoracetic acid in water (A) and acetonitrile (B). As a result of analysis of blank rat serum samples, matrix interference was not shown. The values of precision and accuracy were satisfied w the guideline. A newly developed LC/MS method for the determination of surfactin C was successfully applied in its pharmacokinetic analysis.
통신시스템 유지보수를 위한 최적 예비 회로팩 수량 결정에 관한 연구
이태훈,임건우,윤홍상 광주대학교 1997 産業技術硏究 Vol.8 No.-
교환 및 통신시스템을 운용할 때, 서비스 지속시간을 만족하면서 경제성 측면에서 최적 예비 회로팩의 수량을 산정하는 것은 중요한 문제가 된다. 본 연구에서는 각 회로팩에 대해 고장율과 실장 개수, 서비스 지속율 등에 따라 예비 회로팩 수량을 결정하는 모델을 제시하였고 프로그램을 위한 설계방안을 제시하고 있다. In an environment operating switching and transmission systems, it is a critical factor for the operation to decide the quantity of optimum reserved PBA (Printed Board Assembly) considering the economic factors while satisfying the service continuity time. The paper suggests a model which can decide the number of spare PBA's depending on the failure rate, the quantity of the installed elements, and the rate of service continuity for each PBA. It also delivers a design method for actual computer programming covering the subject.
김태유,양동원,김상윤,김재우,임병훈 대한치매학회 2003 Dementia and Neurocognitive Disorders Vol.2 No.1
Background:There are many global assessment scales for Alzheimer's disease. The clinical Dementia Rating Scale (CDR), the Global Deterioration scale (GDS) and the Blessed Dementia Rating scale have been widely used for evaluating the severity of dementia and might be useful for measuring the change of a patient's status. the CDR has been regarded as the golden standard for the severity of dementia. However, this interview-based scale takes up to 30 min for the clinician to complete, which is impractical in many clinical settings. Furthermore it is not so much sensitive for detecting the change of disease progression in each cognitive domain. We developed a brief and reliable questionnaire for evaluating the severity of dementia, called Cognitive-Clinical Dementia Rating Scale (CCDR). Methods:The CCDR consists of 15 questions that allow to assess the orientation to time, the orientation to place, the orientation to person, memory, attention, language, visuospatial function, frontal executive function, physical self maintenance, home and hobbies, community affair, the duration of dementia, mental alertness, walking ability, onset of abnormal behavior and character change. Ninety-eight probable and possible AD patients received the Clinical Dementia Rating Scale (CDR), Korean version of Mini-Mental State Examination (K-MMSE) and Cognitive-Clinical Dementia Rating Scale (CCDR). We tested validity and reliability. Results:The CCDR was significantly correlated with CDR (r=0.86, p<0.01) and K-MMSE (r=-0.88, p<0.01) and internal consistency was 0.96. Conclusion:The CCDR may be an easy and brief rating scale for the global assessment of Alzheimer's disease with excellent validity and reliability.
Carbosulfan의 피부자극성, 안점막 자극성 및 피부감작성등의 알러지성 효과에 관한 연구
이상훈,이동연,백경진,김태원,정두순,임종환,김명석,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-
Many studies have been published on the human health effects of carbosulfan toxicity. Carbosulfan used as an insecticide can produce an irritating and allergenic effect when acting on the skin. In this study, a sensitization test on albino guinea pigs and intradermal reactivity and occular irritation test on albino rabbits were carried out with carbosulfan. Signs of acute skin inflammation appeared along with the clinical symptom of chronic dermatosis caused by the solution irritating characteristics. Moreover, carbosulfan showed severe eye irritation with conjuctival redness and severe opacity on cornea. Preventive measures should involve workers' obligatory instructions on the noxious impact on human skin and strict observance of industrial safety rules.
김동훈,김기권,장태정,김정란,이구,김수근,임현술 大韓法醫學會 2001 대한법의학회지 Vol.25 No.1
Oxygen deficiency has been frequent in a clouted space. Wood consumes oxygen and discharges carbon dioxide Instead of photosynthesis in closed space without light, so do some microorganisms on the surface. We experienced a case that a healthy Insect-proofer fell down and died of asphyxia on stair-board at 7 m below the hatch of the cargo-hold shipping wood Analysis of gases in cargo-hold revealed O2; 12.3%, CO; 105 ppm, CH4; 2.7%, and H2S; 1.9% at 1 m below the hatch, and then O2; 6.1%, CO; 220 ppm, CH4; 2.9%, and H2S, 2.3 ppm at 2.5 m below the hatch. Autopsy findings were unremarkable. We justiced the cause of death asphyxia due to oxygen deficiency. As seen in this case, the serious oxygen deficiency was accounted for oxygen consumption by wood and microorganisms.
강인한 퍼지 디지털 PI+D 제어 시스템의 설계 및 구현
권태익,이재홍,김승철,설재훈,임영도 동아대학교 정보기술연구소 2001 情報通信硏究所論文誌 Vol.9 No.1
In this paper, Fuzzy Digital PI+D Controller plans for load, noise, plant change, Fuzzy Controller makes use of simple four rule and membership function, and plant used three phase Induction Motor. Characteristic of system compared from experimentation respectively the proposed Control System, Digital PID Control and Digital PI+D Control System.
김태유,김상윤,최성혜,양동원,김재우,손정은,임병훈,인연권 대한치매학회 2004 Dementia and Neurocognitive Disorders Vol.3 No.2
Background: Confrontational naming test is useful in evaluating the language function. It reveals memory and cognitive processing dysfunctions in many neurologic diseases including dementia. Although the Korean version of the Boston Naming Test (K-BNT) has been a popular and useful test, it takes much time and effort in dementia patients of moderate to severe stage of disease or in elderly individual with low educational level. So we developed the Korean Naming Test (KNT). Methods: KNT consists of relatively easy 40 items. Each item was familar materials around us and simplified figures with black thick line. Ninety two of probable Alzheimer's patients received the Korean version of Mini-Mental State Examination (K-MMSE), the Korean version of expanded Clinical Dementia Rating Scale (CDR), K-BNT and KNT. We tested reliability and validity of KNT and also evaluated scores of the KNT along with CDR. Results: The KNT correlated with K-BNT [0.75(p;0.01)], CDR [-0.49(p;0.01)], K-MMSE [0.55(p;0.01)]. The internal consistency was 0.91 (Cronbach's alpha). The KNT score decreased as the disease progressed. Conclusions: The KNT is a brief and good test for evaluating language function of moderate to severe dementia patients with low educational level. Also it is sensitive to mild stage of disease and has a excellent reliability and validity.