• 대한수학회보
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• 제55권6호
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• pp.1869-1889
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• 2018

We are concerned with the following fractional p-Laplacian inclusion: $$(-{\Delta})^s_pu+V(x){\mid}u{\mid}^{p-2}u{\in}{\lambda}[{\underline{f}}(x,u(x)),\;{\bar{f}}(s,u(x))]$$ in ${\mathbb{R}}^N$, where $(-{\Delta})^s_p$ is the fractional p-Laplacian operator, 0 < s < 1 < p < $+{\infty}$, sp < N, and $f:{\mathbb{R}}^N{\times}{\mathbb{R}}{\rightarrow}{\mathbb{R}}$ is measurable with respect to each variable separately. We show that our problem with the discontinuous nonlinearity f admits at least one or two nontrivial weak solutions. In order to do this, the main tool is the Berkovits-Tienari degree theory for weakly upper semicontinuous set-valued operators. In addition, our main assertions continue to hold when $(-{\Delta})^s_pu$ is replaced by any non-local integro-differential operator.

• 설비공학논문집
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• 제6권4호
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• pp.354-364
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• 1994

Experiments have carried out to investigate the effects of parameters, such as mass ratio of R141b-to-water, stirrer speed, brine inlet temperature, brine flowrate, and additives, on the performance of the cool storage system using R141b clathrate. The cool storage system in this experiment was composed of storage tank, refrigerator, and heater. The results show that the mass ratio of R141b-to-water, 1 : 3~1 : 3.5 gives the best performance and the stirring speed has optimum point as 600rpm. At this speed impeller Reynolds number is $1.01{\times}10^5$. The lower the inlet brine temperature and the highter the brine flowrate, the better performance. The addition of metal powder turned out to reduce the degree of supercooling. The supercooling reduction was proportional to the amount of the metal power. However when metal powder was added more than 0.1 wt%, there was no additional supercooling reduction. The surfactants shortened the time consumed for cool storage to the half of no surfactant added case.

• Asian Pacific Journal of Cancer Prevention
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• 제14권5호
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• pp.2839-2843
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• 2013

Objective: To investigate the effects of miR-106b on malignant characteristics of gastric cancer cells, and explore possible mechanisms. Methods: Expression of miR-106b, p21 and E2F was determined by real-time PCR. Transfection with miR-106b mimics was conducted, and gastric cancer cells with miR-106b overexpression were obtained. Cells transfected with mimic mutants and those without transfection served as negative and blank controls, respectively. Flow cytometry and transwell assays were adopted to detect the effects of miR-106b overexpression on cell cycle, migration and invasion of gastric cancer cells. Results:. The expression of miR- 106b in gastric cancer cells was significantly higher than that in normal gastric mucosa cells. Furthermore, the expression level of miR-106b rose according to the degree of malignacy among the three GC cell strains (MKN- 45 > SGC-7901 > MKN-28). Overexpression of miR-106b shortened the G0/G1 phase and accelerated cell cycle progression, while reducing p21 and E2F5, without any significant effects on the capacity for migration and invasion of gastric cancer cells. Conclusions: miR-106b may promote cell cycling of gastric cancer cells through regulation of p21 and E2F5 target gene expression.

• 한국방사선학회논문지
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• 제6권5호
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• pp.335-342
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• 2012

경상북도에 소재한 5개 종합병원 영상의학과의 오염도를 계수하고, 오염 원인균을 배양하여 동정하고 이를 토대로 지역사회 영상의학과의 효율적인 감염관리 방안을 모색하고자 하였다. 확인된 표면오염 균주는 Staphylococcus, Micrococcus, Pseudomonas stutzeri, Pseudomonas oryzihabitans로 병원 감염의 원인균으로 알려진 균주였고 영상의학과의 오염원으로 특이성을 가진 균주는 없었다. 조사대상 병원은 비슷한 감염관리교육을 실시하고 있었으나 병원별 오염도의 차이는 유의한 차이를 보였다. 조사대상 병원별 접촉원에 따른 오염도의 차이는 방사선사 사용, 환자사용, 공통사용으로 구분하여 분석한 결과 환자사용이 방사선사사용, 공통사용에 비해 유의하게 높은 오염도를 보였다(p<0.001). 병원별 월평균 검사건수의 차이가 적은 장치는 모든 병원에서 유의한 차이를 보이지 않았으나 이에 비해 촬영건수가 가장 많은 일반촬영장치, 흉부전용촬영대의 오염도가 다른 촬영장치에 비해 오염도가 높았다. 또한 월평균 촬영건수가 많은 A, B, C 병원은 방사선사가 단독으로 사용하거나 또는 환자와 공통으로 사용하는 방사선조사장치, 사무용책상, 출입문 손잡이에서 비교적 높은 오염도를 보였다.

• 한국세라믹학회지
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• 제34권4호
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• pp.413-419
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• 1997

The specimens which were prepared from cokes with additions of 0~25 wt% B4C were sintered in Ar atmosphere at 220$0^{\circ}C$. The effects of B4C content on graphitization and oxidation resistance of cokes were investigated. B4C accelerates the graphitization of cokes and at 220$0^{\circ}C$ the degree of graphitization increased from 0.33 which is the value of pure carbon to 0.56, which increased bluk density and porosity. Especially bending strength increased as th graphitization temperature increased. Oxidation resistance property was greatly improved when B4C was added more than 10wt% at 80$0^{\circ}C$ and when B4C was added more than 20wt% at 100$0^{\circ}C$. This was because that the thin layer of B2O3 glass phase on the surface of the composite could be identified to increase the oxidation resistance.

• 한국토양동물학회지
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• 제7권1_2호
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• pp.1-5
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• 2002

본 실험은 B. (parudacus) depressa의 최초 우화시기를 알아보기 위해 지표트랩과 McPhail트랩을 사용하여 조사하였고 B. (paradacus) depyessa와 B. (zugodacus) scutellarus 의 색, 먹이, 트랩에 대한 유인 효과를 조사하였다. 그 결과 전북 진안, 익산지역에서의 최초 우화시기는 6월 초, 년중 발생은 1회로 최성기는 6월 말인 것으로 들어났다. B. (paradacus) depressa의 경우 색에 대한 유인반응에 차이가 크지 않지만 특히 청색은 유인효과가 없었다. B. (zugodacus) scutellatus는 황색과 녹색 모두에 유인이 잘 되었다. 먹이별 트랩 유인효과는 B. (paradacus) depressa의 경우 우화초기인 6월 YH에 많이 유인되었다. B. (zugodacus) scutellatus의 경우 호박즙에 더 많은 개체가 유인되었다. 트랩별 유인효과에서는 B. (paradacus) depressa는 McPhail 트랩, B. (zugodacus) scutellatus는 끈끈이트랩에 더 잘 유인되었다. B. (paradacus) depressa는 출현 초기 YH가 유인효과가 높고, B.(zugodacus) scutellatus는 호박즙액과 끈끈이 트랩에 유인효과가 있으나 끈끈이트랩이 보다 효율적이었다.

• 한국조리학회지
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• 제4권
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• pp.295-315
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• 1998

This paper attempts to examine the degree of chef's satisfaction on food purchasing in 5-star hotel in Seoul. Nowadays, hotel industry in Korea is becoming more and more competitive and the hotel products higher education. Among a range of divisions in deluxe hotel in Seoul, in particular, a F&B division has been more profitable than the others. It is widely accepted that the proportion of revenue obtained from F&B sales is higher than that of revenue from room sales. However, under the IMF intervention, hotels in Korea trend to depend on room sales rather than F&B sales in terms of profit. In such a environment, it is essential that F&B division should carefully seek for an appropriate purchasing procedure which will affect an organizational structure and allow the company to fulfill its goals. Moreover, it is timely their performance and quality of services through ideal food purchasing procedure. In this paper, the author uses a survey technique distributed to approximately 200 chefs who work at 5-stars hotel in Seoul. The author expects that this paper will contribute to the researchers or practitioners who might need a reference on the food purchasing system.

• Journal of Periodontal and Implant Science
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• 제29권3호
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• pp.703-715
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• 1999

The purpose of this study was to evaluate the degree of wear of periodontal curet's cutting edges made by three different manufacturers. In the first case of the experiment, this study was done with each new curett in the following three experiment. Twelve new double-ended No. 11/12 Gracy curettes from three different manufacturers (A, B and C) was randomly selected from our stock at first test. They were weared by wear tester with fixed pressure and limited distance. This study measured the width of worn curettes'cutting edge. The results were as follows ; 1)In 50 times experiment, this study discoverd that each manufacturer's curette was appeared with different degree of wear (p<0.01) 2)In 100 times experiment, this study result similarly to the 50 times experiment(p<0.01). 3)In 150 times experiment, the result of this study were alike as the X50 experiment and X100 experiment. In the second case of the experiment, the study was done with a curett of a manufacturer in the following three experiment. Two double-ended No. 11/12 Gracy curette from three different manufactures (A, B and C) was randomly selected from our stock at second test. 1)In 50 times experiment, this study discovered that each manufacturer's curette was appeared with different degree of wear (p<0.05). 2)In 100 times experiment, the result was same, compared with the 50 times experiment. 3)In 150 times experiment, this study also discovered that the result was same with the result of the upper two cases. In conclusion, this study discovered that the two cases of experimental were shown with a same result.

• 한국의류학회지
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• 제26권3_4호
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• pp.464-472
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• 2002

The aim of this study was to elucidate dyeability and antimicrobial activity of cotton fabrics dyed with Sophora Radix extracts according to various mordants. Dyes were extracted from Sophora Radix using ethanol. Then, cotton fabrics were dyed with extracts two times by post-mordanting method in which the extract was 60% (owf, the mordant was 3% (owf), L.R was 1:20, the temperature was 60~7$0^{\circ}C$, the time of dyeing was 60min., and the time of mordanting was 60min.. The dyeability was evaluated by surface color and color fastness. The skin microorganism was evaluated on S. sureus, B. subtilis, S. epidermidis, P. acnes, P. aeruginosa, E. coli, A. niger, C. albicans and T. mentagrophytes. The results are as follows; 1. When mordants were treated, surface color was 3.3Y to 0.1 GY in H (hue) value which indicated greenish yellow to yellow 2. The color fastness to perspiration, dry-cleaning, rubbing, and washing stain fabric showed 4~5 degree. The color fastness to light was improved to 4 degree by treatment of mordants. The color fastness to washing was 2 degree which was somewhat poor. 3. Cotton dyed with ethanol extracts was excellent on S. aureus, B. subtilis, S. epidermidis and p. antis. But that showed poor antibacterial activities on P. aeruginosa and E. coli such as gram negative baterials 4. Antibacterial activity of cotton fabrics dyed didn't be improved by treatment of mordant 5. Antifungal activity of cotton dyed with ethanol extracts was excellent on T. mentagrophytes. Especially, on T. mentagrophytes there was no growth of fungus during 72 hours in cotton dyed mordanting with SnCl$_2$.$_2$$H_2O$.

• 대한자기공명의과학회:학술대회논문집
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• 대한자기공명의과학회 2001년도 제6차 학술대회 초록집
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• pp.170-170
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• 2001

Purpose： To evaluate the relationship between reperfusion hyperemia in reversible cerebral ischem and the degree of programmed cell death. Method： We produced the animal models of reversible cerebral ischemia in 10 cats by mean of middle cerebral artery (MCA) occlusion with transorbital approach. MCA was occluded b microvascular clamp for an hour. MR imaging was performed at 0, 1, 2 days after ischemi and reperfusion. Perfusion (PWI) [Contrast enhanced GRE EPI, TR/TE= 1500/40, 40 Phases, 128 matrix, 12 cm FOV] and diffusion (DWI) (SE EPI, b=0, 500, 1000) weighted images were obtained using Philips Intera 1.57 system. rCBV and ADC maps were calculated wi IDL based postprocessing program. Tissue slices were obtained after the last MR imagin TUNEL, Calbin and Acid-Fuscin staining were done for corresponding slices as MR imagin We investigated the differences of degree of apoptosis in the area of reperfusion hyperemia.