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안벽구조물에 대한 Centrifuge 모형실험과 수치해석
유남재,김동건,전상현 江原大學校 産業技術硏究所 2009 産業技術硏究 Vol.29 No.B
In this paper centrifuge model tests and numerical analysis on the coastal structure on the marine deposits of sand were performed to investigate the behavior of structure and foundation under the condition of wave action in field. In centrifuge model experiments, construction sequence of coastal structure such as preparation of sand deposit, excavation replacement, rubble mound with crushed stones and installment of coastal structure was reconstructed and the behavior of ground settlement during stage of construction was observed during tests. For the final stage of simulating the horizontal movement of coastal structure due to wave force, horizontal load was applied by horizontal loading apparatus being specially designed so that horizontal displacement of structure could be observed. Numerical analysis were also carried out and its results were compared with test results to assess the property of centrifuge mode experiments with respect to the behavior of structure as well as ground.
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유동호,김형아,허용,성재혁,이한기,박용규 한국산업위생학회 2003 한국산업보건학회지 Vol.13 No.1
The aim of this study was to evaluate exposure to dust and endotoxin produced while working at swine confinement buildings. The dusts and endotoxin may cause adverse health effects on humans. Fourteen swine farms located at Yong-In, I-Cheon and Yeo-Ju of onggi-do were investigated. Husbandry workers form the farms were requested to wear personal sampler to measure respirable dust levels. Area samplings for total and respirable dust were also conducted at swine confinements buildings by season (summer under window open, winter under window close.) Gravimetric analyses and Limulus Amebocyte Lysate assay for measu- rement of dust level and endotoxin, respectively. The highest geometric mean (GM) concentration of airbome dusts was 7.47mg/㎡ for area respirable dust. and 10.35mg/㎡ for personal respirable dust. For respirable dust levels, seven farmers exceeded level of ACGIH, 3mg/㎥. The highest GM of endo- toxin was 5745.40 EU/㎥ for personal respirable dust. Significantly increased level of total dust (p〈0.001) and endotoxin in area total dust was observe with winter samples compared with those of summer. Area total dust and area respirable dust (r-0.622, p〈0.0001) was very significantly correlated in winter. Swine husbandry worker may have a considerable risk of ill health whenexposed to level of dust or endotoxin demonstrated at this study.
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유동환,김은철,김상철 원광대학교 생체재료·매식연구소 1997 원광생체재료·매식 Vol.6 No.1
This study was designed to evaluate the expression of heat shock protein in tooth and surrounding tissue during the experimental movement of rat incisors, by LSAB(labelled streptavidine biotin) immunohistochemical staining for heat shock protein. Twenty seven Sprague-Dawley rats were divided into a control group(3 rats), and 6 experimental groups(24 rats), to which 75g of force was applied from helical springs across the maxillary incisors. Rats of experimental groups were sacrificed at 0.5, 1, 4, 7, 14 and 28 days after force application, respectively. And the periodontal tissues of a control group and experimental group were studied immunohistochemically. The results were as follows : 1. In control group, the expression of HSP47 was rare in gingiva, dentin and cementum, and mild in periodontal ligament and alveolar bone. But it was more evident than that of HSP70. 2. The expression of HSP47 or HSP70 was rare or mild in dentin, cementum and odontoblast of experimental group, regardless of the duration of force application, which was not different from experimental group, regardless of the duration of force application, which was not different from that of control group. 3. In experimental group, the expression of HSP47 got to the highest degree in periodontal ligament and alveolar bone at 4 days after force application, and then decreased. And the expression was more evident in the pressure side than in the tension side of periodontal ligament 4. The expression of HSP70 began to increase at 12 hours after force application and got to the highest degree at 4 days, in the capillary of pulp and periodontal ligament. And the expression was more evident in the pressure side than in the tension side of periodontal ligament 5. The expression of HSP70 in alveolar bone of experimental group was rare, which was similar to that of control group.
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유희정,이성동,김헌수,민병근,박인호 울산대학교 의과대학 1994 울산의대학술지 Vol.3 No.1
The authors experienced a patient with insulinoma presented with neuropsychiatric symptoms. It was demonstrated that Whipple's triad is highly suggestive of the presence of an insulinoma. Therefore physicians and/or psychiatrists, who refer patients with insulinoma to third institution, always have a alertness to neuropsychiatric symptoms of insulinoma and Whipple's triad. This case also illustrated the persistence and cooperation between psychiatric and medical teams including the involvement of a neurologist, endocrinologist, and surgeon for diagnosis and treatment planning of patient with insulinoma.
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柳南相,申東浩 忠南大學校 1974 論文集 Vol.13 No.1
The method for systematize the Korean Nationalistic historical philosophy in view of Koreanized Yi-King theory was dealt in this paper. The Koreanized Yi-King theory which had been based on the calendar principle was regarded more profound than the original one of China which had been based on the hexagram principle. Therefore, the principle of nationalistic historical philosophy was induced through the Koreanized Yi-King theory. The history of Korean thought can be analized through this principle. Then, Birth-Growth view of history could be established as fllowing; 1. Conception stage (Adult stage) (2300-200B.C.) DanKoon period, whose thought is the one which is peculiar to Korea is regarded as this stage. It covers the primitive age and the mythological-Legendary age of Korea. 2. Birth stage (200 B.C.-500 A.D.) Three countries (KoGoo Ryu, Bakje and SinLa) stood abreast in this stage. During this atage, Taoism was resulted from China and then was Koreanized, which was resulted in a birth of the history of Korean thought. 3. Juvenale stage (200-1200) The period from the time when SinLa had unified the three countries to the one of late Korea dynasty is regarded as juvenile stage. During this stage, Buddhism was transmitted from China and then was Koreanized. The history of Korean thought began to grow in this stage. 4. Adolescence stage (1200-1900) The period from the late Korea dynasty to the late Yi-dynasty is regarded as a adolescence stage. During that time, Neo-confucianism was transmitted from China and then was Koreanized. The History of Korean thought began to ripe in this stage. 5. Adult stage (1900-to the future.) This stage will cover the period from the late Yi-dynasty to the future through the present time. The Korean thought being affected by Taoism, Buddhism and Neo-confucisnism during its growth, again imported the religion, philosophy and scientific idea of the occident. And their digestion are still going on. The Korean thought might be modernized by recognition of its own tradition. Then Korean thought, which is acknowledged universally could be established its adult stage.
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유병대,김성진,이명갑,서영조,강재구,이동필 대한응급의학회 2000 대한응급의학회지 Vol.11 No.4
Background: Good documentation of electrical injuries at the time of presentation is very important to emergency management, so this study was designed to investigate the clinical characteristics and the outcomes of patients with electrical injury. Methods: A review of 75 cases of electrical injuries admitted to our hospital via the emergency department over a 4 year period from 1996 to 1999 was conducted. Results: There were 49 patients with high-voltage injuries and 19 patients with low-voltage injuries. All but 4 patients were males, with a mean age of 29.5 years. The most common type of injury was electrothermal burn. The most common point of entry was hand. The average size of burn wounds was 14.5% TBSA in the high-voltage group and 2.5% in the low-voltage group. Forty-nine(72.1%) of the injuries were work related. The number of patients with compartment syndrome was 19, and fasciotomies were performed in all but one patient. Myoglobinuria was noted in 22 patients, but no patient developed acute renal failure due to myoglobinuria. In the high-voltage group, 10 limb amputations were performed. Complication were observed in 12 patients. The most common complication was neurological injury. The average length of hospital stay was 50.7 days in the high-voltage group and 13.8 days in the low-voltage group. The overall mortality rate was 4.3%. Couclusion: Prevention of electrical injuries is very important. Education and compliance with safety measures, as well as basic knowledge and precaution in dealing with electricity, are essential to avoid these injuries.
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성대동,박유미 동아대학교 환경문제연구소 1993 硏究報告 Vol.16 No.1
The reaction mechanism and molecular carcinogenetic property for the reaction of Seyferth's reagents such as phenyl(bromodichloromethyl)mercury and phenyl(tribromomethyl) mercury with food additives as dehydroacetic acid and coumarin has been studied under the conditions fo UV/vis photolysis and laser flash photolysis. 1. The reaction reactivities of Seyferth's regents as phenyl(bromodichloromethy1)mercury and phenyl(tribromomethyl) mercury are compared in all reaction conditions. The reactivity of phenyl(bromodichloromethy1) mercury is higher than the reactivity of phenyl(tribomomethy1) mercury at any reaction conditions in this research. This means that the leaving effect of : CCl₂carbene is higher than that of CBr₂carbene from mercury atom in Seyferth's reagent. 2. The yield of a highly toxic carcinogenetic carbene intermediate in the condition of UV/vis photolysis is less than those of laser flash photolysis. It is explainable that the reactions of Seyferth's reagent with the food additives are inhibited compared with the dimerization reaction of dihalogen carbenes each other. 3. The reactions of Seyferth' s reagents with dehydroacetic acid and coumarin are accelerated increasing with the negative(-) values of the bond energy of HgCCX₂and σ MO energy.
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