• 미생물학회지
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• 제38권3호
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• pp.162-167
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• 2002

항진균 활성 관련 단백질을 찾기 위해 미역류로부터 Streptomyces sp. SAR01을 분리하고, FAME (fatty acid methyl ester)분석으로 동정하였다. 감마선(sup $({60}^Co)$)조사를 이용하여 항진균 활성 결핍 돌연변이체(SAR535)를 유도한 후, 이차원전기영동으로 단백질을 분석한 결과 SAR01에만 존재하는 6종의 단백질을 확인할 수 있었다. 이중 10 kDa chaperonin cpn10 (GroES)과 96%의 상동성을 가진 10 kDa의 단백질을 클로닝하였으며, E. coli Ml5에서 과대 발현됨을 확인하였다. 또한 SAR535에 형질전환시킨 결과 SAR01과 유사한 항진균 활성이 나타났다. 이것으로 볼 때 groES는 Streptomyces sp. SAR01의 항진균 활성에 관련된 것으로 사료된다.

• 정보처리학회논문지B
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• 제13B권2호
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• pp.77-82
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• 2006

디지털 해프토닝은 연속계조영상과 시각적으로 유사한 이진 영상을 얻기 위한 방법이다. 이러한 해프토닝 방법 중에서 오차 확산 해프토닝은 다른 해프토닝 방법에 비해 우수한 화질을 보이지만 에지가 흐려지는 단점이 있다. 이러한 단점을 개선하기 위해, 본 논문은 인간의 시각이 국부 평균 밝기를 인식하고 공간적인 작은 변화량을 인식하지 못하는 특성을 이용하여 에지를 강조하는 개선된 오차 확산 해프토닝을 제안한다. 제안 방법은 원 화소의 명암값과 $3{\times}3$ 블록의 평균 명암값과의 차이 값에 공간적 위치 값에 따른 가중치를 결합하여 국부 공간 변화량을 구한다. 그 후 정규화된 공간 활성도(local activity)에 평균 명암도를 곱하여 에지 강조 정보량(IEE : information of edge enhancement)을 구하여 IEE를 양자화기 입력에 더하여 에지를 강조한다. 컴퓨터 시뮬레이션은 제안 방법이 기존의 방법에 비해 영상의 에지가 강조되어 시각적으로 선명한 영상을 생성하며 물체의 경계가 잘 보존됨을 보여준다. 또한 거리에 따른 에지 상관도와 로컬 평균 일치도에서도 기존의 방법에 비해 개선된 결과를 보여준다.

• Toxicological Research
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• 제28권3호
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• pp.151-157
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• 2012

This paper describes the effects of thermally oxidized tallow on the serum lipids profile and radical scavenging activity (RSA) of the lipids extracted from the different tissues of the rabbits. Tallow was thermally oxidized at $130^{\circ}C$ for 9, 18, 27, 36 and 45 h respectively. Thermally oxidized tallow was fed to the local strain of Himalayan rabbits for one week. Results show that oxidation increases the formation of hydroperoxides and decrease the level of radical scavenging activity of the tallow. The rabbit serum lipids profile showed a dose dependent increase in triglyceride, total cholesterol and LDL-cholesterol. However, no statistically significant increase was observed in the HDL-cholesterol with an increase of oxidation time. Serum glucose and rabbits body weight decrease significantly (p < 0.05) and was highly correlated with the serum lipids profile. The percent RSA of the lipids extracted from the liver, brain and muscles tissues showed a significant decrease with respect to 0.5, 1.0 and 1.5 g/body weight as well as oxidation time. Data suggests that thermal oxidation and use of thermally oxidized beef tallow is harmful and therefore an alternative way of cooking should be used.

• 한국농공학회지
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• 제35권3호
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• pp.74-80
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• 1993

Runoff simulation tests to investigate the flow mechanics of nonsuomerged overland flow in a natural grass intervening land system were condueted and a modified kinematic wave overland runoff model developed by Choi et al. (1993) was verified. Nonhomogeneity and heterogeneity of the soil, slope, local topography, infiltration, grass density, and the density and activity of the soil microhes and wild animals were the major factors affecting the flow. Streamlines were disturbed by grass stems and small concentrated flows due to the disturbed streamlines and local topography were observed a lot. Relatively larger concentrated flows were observed where bundles of grass were dominant than where individual grasses were growing. Predicted hydrographs were agreed verv well with measured hydrographs. Since the modified model considers grass density in computing flow depth and hydraulic radius, it can be better than existing kinematic wave model if it were used to route nonpoint source pollutant attenuation processes in many grass intervening land systems.

• 한국자기공명학회논문지
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• 제13권2호
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• pp.135-142
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• 2009

$^{195}Pt$ NMR measurements were performed to deduce the variation of local density of states at the Fermi energy ($E_F$-LDOS) at the surface of carbonsupported Pt catalysts due to the addition of $Nafion^{(R)}$ ionomer in the metalelectrode-assembly for fuel cells. The results showed that the EF-LDOS at the surface of Pt particles was enhanced by the addition of $Nafion^{(R)}$ ionomers whereas it was uninfluenced in the inner (bulk) part of the Pt particles. This suggests that the effects of ionomers on the electronic states of the Pt particle surface are related to the electrochemical activity of the catalysts.

• 한국멀티미디어학회논문지
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• 제22권1호
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• pp.10-17
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• 2019

In High Dynamic Range (HDR) image processing, tone mapping is the process to compress an input image into a Low Dynamic Range (LDR) image. In most cases, the reason that detail preservation is prior to take over tone mapping is that the dynamic range is significantly different between input and output images. In the case of iCAM06, details are separated by using a bilateral filter, however, it causes noise amplification at the dim surround region. Thus, we suggest that the detail signal, which is separated from the bilateral filter, is combined with the base signal after an adaptive Kalman filter is applied according to the local standard deviation. We confirmed that the proposed method enhances the HDR images quality by checking the noise reduction in a dim surround region.

• 천문학회보
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• 제46권1호
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• pp.54.1-54.1
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• 2021

Observing sub-mm continuum emission from cold dust can play an important role in measuring star formation rates of galaxies, especially in the case of AGN host ones, since AGNs contaminate FIR fluxes by dust heating. To measure star formation rates, we observed total 49 local AGN host galaxies(z<0.2) by SCUBA-2 camera at James Clerk Maxwell Telescope(JCMT) at 450㎛ and 850㎛. We performed several tests with the observed images to determine whether each source is detected, and adopted 3s as the flux upper limit in non-detection cases. Using these measurements and FIR archival data, we modeled spectral energy distributions of the galaxies to estimate star formation rates. The effect of AGN activity on host galaxy star formation will be discussed.

• 감성과학
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• 제11권2호
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• pp.193-206
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• 2008

본 연구는 부산 관광이미지 평가를 위해 진행하였다. 부산시 관광산업 현황 조사와 해양 도시에 적합한 관광 상품의 조건을 찾아보기 위하여 부산시민과 외국인 그리고 타 지역인을 중심으로 요인분석을 실시하였다. 조사결과, 부산시민과 외부인은 부산의 이미지를 비슷하게 생각하는 것으로 조사되었다. 외부인에게 있어서 부산의 이미지는 해안가 주변과 관련된 관광과 숙박을 부산의 매력으로 생각하였고 부산 시내의 다양한 볼거리, 쇼핑 등을 장점으로 뽑았다. 분석 결과를 종합해보면 부산시민은 진취적, 포근함, 활동성, 친숙함의 이미지로, 외국인은 포근함 쾌적함, 현대적, 풍부함의 이미지로, 타 지역인은 안심감, 번화함, 독특성, 친근함의 이미지로 인식하고 있었다. 위의 분류된 내용을 공통적 의미를 가진 8개의 요인으로 압축하고 부산시의 관광 관련 구성 요소와 항목간 관련성을 조사하였다. 조사결과 부산 관광산업과 관광 상품 개발을 위한 세부 항목으로는 '안심감', '쾌적성', '독특성'을 우선적으로 고려하며 '풍부함', '친근감', '활동성'을 높일 수 있는 방법을 찾는 것이 부산과 가장 잘 어울리는 관광 상품을 개발하는 방법으로 분석되었다.

• 생약학회지
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• 제40권3호
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• pp.238-243
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• 2009

We examined ethanol extracts prepared from 23 Korean local plants obtained in Pyeongchang, Gangwon-do for their inhibitory effects on recombinant human AKR 1 B10 (rhAKR1B10) in vitro. To do this, rhAKR1B10 was first expressed in E. coli as a biological active form and purified by using Ni-affinity chromatography followed by gel permeation chromatography. Then, rhAKR1B10 was used for screening out 23 Korean local plant extracts having an inhibitory activity against itself. Among them, six extracts showed more than 50% inhibition of rhAKR1B10 activity at the concentration of $10{\mu}g$/ml. Especially, the extracts of Ligularia fischeri var. spiciformis Nakai and Rhus trichocarpa Miq. were the most potent because their $IC_{50}$ values were 2.94 and $2.00{\mu}g$/ml, respectively.

• 한국의류산업학회지
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• 제21권5호
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• pp.665-676
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• 2019

This study provides basic data for future design proposals aimed at improving the uniforms and bullet/stab proof garments of local police. An analysis was conducted on various aspects of the uniforms used until 2015 and those newly introduced in 2016. Current bullet/stab proof garments were compared with old stab proof garments; in addition, police force posting on the internal SNS were analyzed in regards to the improvement needs for uniforms. Analyses results are as follows. As for the uniforms, convenience was improved by eliminating the necktie, and the four trigrams embroidery was added to emphasize the Korean identity. Cargo-style pants were added for enhanced activity, and the color of the top was changed to turquoise to improve discrimination. In terms of material, durable polyester was used heavily in outside uniforms that were likely to be damaged during work; consequently, the percentage of elastic materials was increased for improved activity. The price showed a high increase rate due to inflation and the use of functional new materials. Complaints and demands for improvement continued despite various modifications made to uniforms and suggested a strong need for further improvements that reflected the opinions of wearers. As for the protective garments, there was a limit to reducing the final weight despite the use of lightweight material because of protection performance enhancements made from expanding the protection surface area. Also, considering further decrease in supply rate, it was deemed necessary to secure budget for full supply of bullet/stab proof garments.