立地特性別 Asbestos의 環境濃度

유영식,김종규,민달기,김남천,이형춘,최한영,김을환,우세홍,이상건 서울保健大學 1989 論文集 Vol.9 No.1

粘性土의 一次元壓密에 관한 實驗的 硏究

劉範植,趙成敏 안성산업대학교 1993 論文集 Vol.25 No.-

Many scholars studied about the consolidation character of clay through oedometer test to find out the various phenomena. These studies can be explained by Terzaghi's consolidation theory, the effective stress theory studied by Gibson and Mikasa, Hansbo's theory about critical hydraulic gradient and Mitchell's clogging phenomenon. These researches could not explain the consolidation behavior adequately because of the unskilled manufaturing techniques of test apparatus. So the research of one-dimensional consolidation using adequate consolidometer is needed to get the more precise results. This paper analyzes the one-dimensional consolidation behavior through the loading, unloading and reloading using the oedometer test and triaxial compression consolidometer Generally, it is hard to get the precise stress path and the consolidation behavior of the each part of the specimen by odeometer because of the effect of side friction and unsaturation. To reduce these problems, the specimen is saturated by the increase of the back pressure during the unloading. Using this specimen, the test of normal consolidation and overconsolidation is analyzed. The results strongly support the principle of effective stress. Under the normal consolidation, the coefficient of compression Cc is constant regardless of the loading stages, but the 24-hour compression curve is nonlinear under the overconsolidation. therefore, the constitutive equation under the normal consolidation can not be applied to that under the overconsolidation.

자수용 DNC검증 및 편집 시스템 개발에 관한 연구

유우식,장성호 金烏工科大學校 1993 論文集 Vol.14 No.-

Presented in this paper is a DNC verification and editing system architecture for embroidery manufacturing. Embroidery machines are numerically controlled machines with multi head, but they have not standard RS-232C communication port in general. So embroidery machines receive NC data from reels of 1 in . wide tape containing holes. But punched tape as an input media has many defects. In this paper, we present DNC(Direct Numerical Control) verification system eliminating punched tape. With the proposed system, NC data editing algorithm are also presented.

한국 진도견의 serum protein 및 lipoprotein 변동에 관한 연구

유상식,이명헌,김상근 충남대학교 수의과대학 동물의과학연구소 1998 動物醫科學硏究誌 Vol.6 No.-

The concentration of serum proteins and lipoproteins in Korean Jindo dogs were examined from the time of after birth to 150 days of age. Eight(4 females and 4 males) Jindo dogs were used in this study. Concentration of serum proteins and lipoproteins were fractioned by cellulose acetate electrophoresis. The results are summarized as follows; 1. The total serum protein concentrations at 1 days(4.6±0.4 g/dl) after birth were lower than in adult dogs, thereafter increased rapidly at 3 days(7.1±0.6 g/dl) of ages, and there was no significant changes between sexes. 2. The concentrations of serum protein from the time of after birth to 150 days of age were 0.35±0.1-8.5±0.2 g/dl and 0.5±0.1-0.8±0.2 g/dl, respectively. The γ-globulin concentrations were not detected 1 days after birth and increased rapidly after pups ingested colostrum(after 3 days of age), thereafter there was no significant changes of γ-globulin concentration after 10 days of age. 3. The concentrations of serum α, β-lipoprtein were not detected 1 days after birth and increased rapidly after pups ingested colostrum(at 3 days of age), from the time of after birth to 150 days of age were 49.1±11.6-94.1±16.4 ㎎/dl and 11.7±6.5-102.0±10.8 ㎎/dl, respectively. 4. the γ-lipoprtein concentrations no detected 1 days after birth and increased rapidly after pups ingested colostrum(at 3 days of age, 11.6±2.5 ㎎/dl) and decreased gradually during 50 days of age, and thereafter increased rapidly during 100-150 days of age(71.8±4.8-77.2±4.1 ㎎/dl).

난소적출 rat에 생약물질을 투여했을 때 호르몬 및 생화학치의 변동에 미치는 영향

유상식,김상근 충남대학교 수의과대학 동물의과학연구소 2000 動物醫科學硏究誌 Vol.8 No.-

This study was performed to elucidate the effects of antler, red ginseng, safflower seed, ipriflavone and estrogen on ovariectomized rats. The rats were fed with Ca- and P- deficient diet for five weeks to induce osteoporosis. After this period, these animals were fed with normal feed and treated every other day with antler(600 ㎎/㎏, p.o), red ginseng(200 ㎎/㎏, p.o), safflower(200 ㎎/㎏, p.o), ipriflavone(80 ㎎/㎏, p.o) and estrogene(400 ㎍/㎏, i.m) for 5 weeks. During the treatment, the rats were examined for serum concentrations of estradiol, calcitonin, Ca, P, alkaline phosphatase(ALP) activities, body weight, femur ash and Ca contents. The results are summarized as follows: 1. The levels of serum 17 β-estradiol after five weeks of treatment were showed 39.6±3.0 pg/㎖ by antler-, 33.2±2.5 pg/㎖ by red ginseng-, 34.9±2.4 pg/㎖ by safflower-, 28.1±3.1 pg/㎖ by ipriflavone- and 40.6±3.0 pg/㎖ by estrogen-treated group. They, however, were signigicantly higher than 26.8±1.8 pg/㎖ of ovariectomized non-treatment group(p<0.05). 2. The levels of serum calcitonin after five weeks of treatment were showed 0.06±0.02 ng/㎖ by antler-, 0.55±0.04 ng/㎖ by red ginseng-, 0.59±0.02 ng/㎖ by safflower-, 0.56±0.04 ng/㎖ by ipriflavone- and 0.62±0.02 ng/㎖ by estrogen-treated group. However, they were significantly higher than 0.45±0.05 ng/㎖ of ovariectomized non-treatment group(p<0.05). 3. The levels of serum Ca contents after five weeks of treatment with antler, red ginseng, safflower, ipriflavone and estrogen were a little higher than 21.43±2.22 ㎍/㎖ of normal control group. 4. The serum P contents after five weeks of treatment were showed 12.11±2.14 ㎍/㎖ by antler-, 13.18±1.64 ㎍/㎖ by red ginseng-, 12.67±2.31 ㎍/㎖ by safflower-, 12.38±2.07 ㎍/㎖ by ipriflavone-, 11.86±1.93 ㎍/㎖ by estrogen-treated group. 5. The levels of serum ALP after five weeks of treatment were showed 164.8±3.8 IU/㎖ by antler-, 277.7±4.8 IU/㎖ by red ginseng-, 288.5±4.5 IU/㎖ by safflower-, 214.7±5.7 IU/㎖ by ipriflavone- and 159.4±5.4 IU/㎖ by estrogen-treated group. They were significantly higher than 144.1±3.5 IU/㎖ of normal control group(p<0.05). 6. The body weights of the antler-, red ginseng-, safflower-, ipriflavone- and estrogen-treated groups after five weeks of treatment, were 303.0±3.0g, 273.3±4.4g, 288.3±5.1g, 300.5±5.2g, 320.5±4.2g, respectively. 7. The weights of ashed left femora after five weeks of treatment were showed 0.36±0.01g by antler-, 0.40±0.01g by red ginseng-, 0.41±0.01g by safflower-, 0.36±0.01g by ipriflavone- and 0.35±0.01g by estrogen-treated group. Those results were significantly lower than 0.43±0.01g of normal control group. 8. The femoral Ca contents of the antler-, red ginseng-, safflower-, ipriflavone- and estrogen-treated rats were 19.6±0.7%, 17.8±1.1%, 18.8±0.9%, 18.0±1.1%, 18.3±1.1%, respectively, after five weeks of treatment. The femoral Ca contents of antler- and safflower-treated groups were higher than that of control group which showed 18.2±0.9% of Ca. Antler and safflower elevated serum estradiol and calcitonin, and decreased serum ALP significantly. Therefore they were thought to have therapeutic effect on osteoposis by making inhibitory effect on osteoclasts than activating osteoblasts.

쉐도우마스크 측정시스템의 분석 소프트웨어 개발

유우식,장성호,김병만 國立金烏工科大學校附設生産技術硏究所 1995 産業技術開發硏究 Vol.11 No.-

Shadow mask is one of the key components which decide the quality of CRT screen. Therefore, the inspection of the exactness of shadow mask forming is important. However, current contact type coordinate measuring machine can only confirm individual measured points. Analysis software for new non-contact shadow mask inspection system which can reduce inspection time and inspection errors rather than current contact type coordinate measuring machine is developed. The developed software can confirm not only individual measured points but also the whole surface profile of the measured shadow mask.

Acriflavine-Guanosine 복합제 (AG60)의 조직내 분포에 대한 형광현미경적 연구

고정식,임수재,안의태,김진국,김상건,이경영,강종구,홍은경,정영신,유보림,한영복 대한해부학회 1999 Anatomy & Cell Biology Vol.32 No.1

세립분 함유율에 따른 투수특성에 관한 실험적 연구

유범식,조성민 안성산업대학교 1995 論文集 Vol.27 No.-

Permeability characteristics are varied with fine grained soil contents, because soil is composed of various grain size. A series of permeability test is performed with the specimens obtained by standard compaction test, and soil samples are obtained by mixing the standard sand with the fine grained soil(passing of #200 sieve) whose rate is from 5% to 50% respectively. The test results are follows. 1) Specmens with 25%-30% fine grained soil shows maximum density but the permeability is not proportional to the density. 2) The relation between dry density and void ratio is derived as following equation. <본문참고> Therefore it is known that here is close relation between dry density and void ratio. 3) The specimens up to 30% fine grained soil, permeability decreases proportional to straight line, but the specimens over 30% fine grained soil, the variation of permeability is almost neglegible. Where as the ralation between permeability and the fine grained soil content is as follows. 30% 〈 log K= -1.492-0.19x 30% 〉log K=-3.89-7.78×10^-2x-3.6×10^-5x^2 (x : fine grained soil cotent ratio) 4) Permeability diminishes on the increment of fine grained soils under the same void ratio on account of it varies with soil grains distribution and related to the size and shape of soil structure.

Imidazole이 내독소에 의한 Shock폐에 미치는 효과

최재유,이상한,한치동,곽정식,손태중 慶北大學校 醫科大學 1991 慶北醫大誌 Vol.32 No.2

Thromboxane synthetase 억제제인 imidazole이 내독소에 의한 쇽폐에 미치는 영향을 규명하기 위해 토끼에 내독소 4.0㎎/㎏을 정맥으로 투여한 후 1, 4 및 8시간에, 그리고 내독소 4.0㎎/㎏을 정맥으로 투여한 직후 imidazole 50㎎/㎏/2hr의 양으로 2시간마다 정맥으로 투여하면서 내독소 투여후 1, 4 및 8시간에 각각 3마리씩 전자현미경으로 관찰하였다. 그 성적을 요약하면 다음과 같다. 내독소 투여후에는 Ⅰ형 폐포세포 표면의 불규칙화, 내피세포의 종창 및 간질의 부종이 일어났으며 이는 내독소 투여후 4∼8시간에 가장 현저하였다. 내독소 및 imidazole 병합투여군에서는 4시간 이후 내피세포의 종창과 간질의 부종이 일어났으며 그 정도는 내독소 단독투여군에 비해 경하였다. 이상의 소견으로 보아 thromboxane A_2의 합성 억제는 내독소에 의한 폐상해를 상당히 경감시킨다고 인정된다. This study was carried out to investigate the effect of imidazole, known as a inhibitor of thromboxane synthetase, on shock lung induced by E. coli endotoxin. White rabbits were intravenously injected 4.0㎎/㎏ of E. coli O26:B6 lypopolysaccharide. The lungs were observed 1, 4, 10 hours after injection. The other rabbits were given same dose of endotoxin simultaneously with imidazole, 50㎎/㎏ continously injections. The results were summarized as follows: After endotoxin injection, irregularity of the surface of type Ⅰ appeared. These changes were more pronounced 4 to 8 hours after injection. In the lungs of endotoxin and imidazole injected group, endothelial swelling and interstitial edema occurred 4 hours after injections. But these changes were mild in degree compared to endotoxin injected group. From these results, it is concluded that inhibition of thromboxane A_2 synthesis can suppress the endothelial injury and pulmonary edema induced by endotoxin.

복합레진의 지연충전이 미세인장 결합강도에 미치는 영향

박현식,조영곤,박병철,김종욱,최희영,김종진,진철희,유상훈,기영재 大韓齒科保存學會 2004 Restorative Dentistry & Endodontics Vol.29 No.3

The purpose of this study was to evaluate the effect of immediate or delayed composite resin filling on dentinal microtensile bond strength (μTBS) after applied the adhesive. The coronal dentin of human third molars was exposed. Single-Bond or One-Step was applied on the dentin surfaces, and composite resin were constructed immediately (group 1) or 5 min., 10 min., 15 min., 20 min. and 30 min. (groups 2-6) after an adhesive was applied. The specimens were sectioned and made bar-shaped. Each surface area of them was about l ㎟. The RBS test was performed by EZ test. The results were analysed by One-way ANOVA and Tukey's test at 95 % significance level. The results suggested that the μTBS of Single-Bond to dentin was decreased when the composite resin was constructed 20 min. and 30 min. after Single-Bond was applied. But the μTBS of One-Step was not affected by delayed composite resin filling.