• Journal of Welding and Joining
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• 제28권4호
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• pp.41-48
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• 2010

The purpose of this study is to establish the control method of the global bending distortion caused by fabrication process of hatch-cover in a container ship. In order to do it, the transitional behavior of global bending distortion in the deck of hatch-cover during fabrication process was measured by 3-dimensional measuring instrument. From the results, the principal factor controlling the global bending distortion was identified as the bending moment associated with the longitudinal shrinkage force and transverse shrinkage caused by welding and flame heating and the change of the centroid axis of hatch-cover in each fabrication process. Therefore, in this study, with the predictive equations of the longitudinal shrinkage force and transverse shrinkage caused by welding and flame heating and the simplified thermo elastic method, the predictive method for the global bending distortion was established and verified by comparing with the measured result. Based on the results, the amount of reverse bending distortion of main stiffeners was determined to prevent the global bending distortion of hatch-cover.

• Structural Engineering and Mechanics
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• 제41권4호
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• pp.509-525
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• 2012

In recent years, CFRP material usage in strengthening applications gradually became widespread. Especially, the studies on the strengthening of shear deficient reinforced concrete beams with CFRP strips are chosen as a subject to numerous experimental studies and research on this subject are increased rapidly. The most important variable, that is affected on the failure mode of CFRP strips and that is needed for determining the shear capacity of the strengthened reinforced concrete beams, is the strain distribution between CFRP strips and concrete. Numerous experimental studies are encountered in the literature about the determination of strain distribution between CFRP strips and concrete. However, these studies mainly focused on the CFRP strips under axial tension. There are very limited numbers of experimental and analytic studies examining the strain distribution between concrete and CFRP strips, which are under combined stresses due to the effects of shear force and bending moment. For this reason, existing experimental study in the literature is used as model for ANSYS finite element software. Nonlinear finite element analysis of RC beams strengthened against shear with CFRP strips under reverse cyclic loading is performed. The strain distributions between CFRP strips and concrete that is obtained from finite element analysis are compared with the results of experimental measurements. It is seen that the experimental results are consisted with the results derived from the finite element analysis and important findings on the strain distribution profile are reached by obtaining strain values of many points using finite element method.

• 약학회지
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• 제46권3호
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• pp.208-212
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• 2002

Dehydroevodiamine HCl (DHED), which is a component separated from Evodia rutaecarpa Bentham, has novel anticholinesterase and antiamnesic activities in the scopolamine-induced amnesia model. Several studies suggest that DHED might be an effective drug for the Alzheimer's disease and the vascular type of dementia. In order to evaluate the mutagenic potential of DHED, Salmonella typhimurium reversion assay, chromosomal aberration test on Chinese hamster lung cells, in vivo micronucleus assay using mouse bone marrow cells, and comet assay were performed. DHED did not increase the number of revertant in the reverse mutation test using Salmonella typhimurium TA1535, TA1537, TA98, TA100. DHED HCl, at concentration of 5 and 10 $\mu\textrm{g}$/mι, increased the number of chromosome aberrated Chinese hamster lung cells with 5 and 10％, respectively. In mouse micronucleus test, no significant increase in the occurrence of micronucleated polychromatic erythrocyte was observed in ICR mice orally administered with DHED. DHED was tested for ability to induce genotoxic effect in L5178Y cells (mouse lymphoma cells) using the single cell gel electrophoresis assay (comet assay). In comet assay, tail moment did not increase in L5178Y cells treated with 10, 100, 300 $\mu$M DHED.

• 한국식품조리과학회지
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• 제10권1호
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• pp.51-56
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• 1994

본 연구에서는 재래식 된장, AsP. oryzae를 이용한 개량식 된장을 만들어 숙성과정 중 지질의 변화와 카보닐화합물의 함량변화를 측정하였다. 1 재래식 된장의 총지질 함량은 숙성에 따라 점차 증가하였고 지질 중의 중성지방은 감소하였으나 유리지방산은 증가하였다. 2. 지방산 조성을 GC로 분석한 결과 포화지방산이 증가하고 불포화 지방산은 감소하였다. 3. 숙성 후 hexane으로 추출한 카보닐의 함량은 증가하였고 monocarbonyl 중 methyl ketone과 alkanal만이 검출되었고 그 함량은 숙성 후 증가하였다.

• Journal of Animal Science and Technology
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• 제52권3호
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• pp.213-220
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• 2010

This study was executed to investigate the effects of drinking deep sea water treated by reverse osmosis process (RO-DSW) on growth performance, nutrient utilizability, relative weight of lymphoid organs and the concentration of serum immunoglobulin G (IgG) in broiler chickens. A total of 200 one day old broiler chickens (Ross 308) were equally and randomly distributed into 10 ground floor pens (20 chicks per pen, 5 pens per treatment) bedded with rice-husks. The broilers were offered either fresh tap water (Control) or RO-DSW for 28 days (from d 6 to d 33) as the drinking water. The same basal phase 1 diet for first 2 weeks and phase 2 diet for last 2 weeks were offered ad libitum to the birds. The RO-DSW was prepared by diluting 1:20 ratio with deionized water before offering to chickens. The diet for control birds was supplemented with 0.21 % of food-grade salt to satisfy salt need of the birds. Broiler feeding study resulted that there were no differences in amount of water consumption, mortality and FCR between RO-DSW and control chickens. However, feed intake and body weight gain were increased (p<0.05) by RO-DSW drinking. There was no (p>0.05) difference in nutrients utilizability between RO-DSW and fresh water drinking. There were no (p>0.05) differences in the immune response between the control and treatment group. The serum IgG levels were 3.01 vs 2.87 mg/ml and the relative weights of spleen, thymus and bursa of Fabricius were 0.23, 0.18 and 0.20 vs. 0.20, 0.17 and 0.14 for RO-DSW vs. control birds, respectively. The immune responses were tended to be improved by RO-DSW drinking. This study showed an improvement in weight gain and feed intake that could be induced by RO-DSW drinking, although it is difficult to explain the reasons of the improvement at this moment. This study implied that RO-DSW could be successfully used as drinking water to broiler chickens.

• 콘크리트학회논문집
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• 제22권3호
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• pp.325-333
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• 2010

이 연구에서는 시공성과 경제성이 향상되고 중진 지역에서 사용할 수 있는 새로운 프리캐스트 콘크리트 보-기둥 접합부 상세를 복합구조로 개발하고 실험을 통하여 이를 검증하였다. 이 상세는 기둥 속에 매립된 각형강관과 보U형 단부를 갖는 보 단부에 매립된 플레이트를 볼트로 결합시킬 수 있는 구조로 되어있다. 하이브리드 스틸-콘크리트 접합합부에 앞서 콘크리트가 조기에 파괴되는 것을 막기 위하여 접합부 부분에 ECC(engineered cementitious composite)를 사용하였다. 개발된 접합부 상세에 대한 성능을 검증하기 위하여 보-기둥 접합부 실험체를 계획하여 이에 대한 내진성능 실험을 실시하였다. 내부 접합부에 있어서는 접합부 횡보강근 유무와 현장타성 범위를 변수로 3개의 실험체를 제작하였다. 실험은 기둥에 일정 축력을 가한 상태에서 PC기둥 단부에 액츄에이터를 설치하여 변위제어로써 반복가력 하여 실시하였다. 실험에서 얻은 자료를 접합부 내력, 강성, 에너지 소산능력 등에 대하여 분석하였으며, 그 결과 이 연구에서 제시한 새로운 보-기둥 접합부 상세는 강재와 콘크리트 그리고 ECC 사이에서의 다른 부착 특성 때문에 구조거동에서 차이점이 관찰되었으며, 기준 실험체를 제외한 두 실험체의 경우 ECC 및 철골연결재에 의해 소성힌지를 유도할 수 있는 것으로 나타났다. 그리고 프리캐스트 접합부는 높은 일체성과 모멘트 저항 능력을 보이며 중진 지역에서 사용가능함을 보였다.

• 한국항공우주학회지
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• 제33권6호
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• pp.21-30
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• 2005

헬리콥터 로터 블레이드 예비설계 단계에서 에어포일 선정과 분포의 기초 자료를 생성하기 위해 로터 에어포일 공력해석을 수행하였다.기존 헬리콥터의 에어포일 중 공력해석 대상으로 10개를 선정하고 블레이드 요소이론을 이용한 공력해석에 적합한 table 형태의 공력계수 자료를 생성하였다. 해석 비용을 고려, 풍동시험 대신 간단한 수학적 모델을 이용하여 모든 받음각 영역($-180^{o}\sim180^{o}$)에서 공력특성 곡선($C_{l},C_{m},C_{d}$)을 구성하였다. 공력특성곡선 구성에 필요한 각 에어포일의 필수 공력자료를 IBLM을 이용하여 구하였으며, 구성된 공력특성곡선은 실험결과와 정성적으로 일치하였다. 마지막으로, 에어포일 선정과 분포설계의 기준을 마련하기 위하여 각 에어포일의 양력계수, 모멘트계수를 상호 비교한 후 분류하였다.

• 만화애니메이션 연구
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• 통권6호
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• pp.91-115
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• 2002

Character industry in Korea has a history of less than 20 years by now, as it began in earnest at the end of the 1980s. Domestic character market is estimated to be around 1.2 trillion won occupying mere 0.01% of the world character market of 1,200 trillion won and less than 4% of the Japanese market, according to the according to the calculation made by Korea Animation Producers Association. Local character takes up only 5% of the domestic character market, necessitating the development of the local character and an increase in market share. It is painful to look at the current status of the local character market especially when compared with the huge world market. However, it might be and opportune moment for us to reverse the situation in our favor by a mental switchover. And we need to face up to the reality that the local character industry has many problems, and it is our duty to settle them. What then are the problems caused by the foreign character taking up 90% of the domestic market? Foreign character overwhelming the local market will bring about cultural dependency, emotional confusion, and financial loss caused by the payment of the royalties stemming from the intellectual property rights. The following is suggested as methods of settlement for such problems: 1. Development of character emotionally appealing to the Koreans 2. Development of long-lived character 3. Development of character firmly based on a good scenario 4. Thorough planning & marketing 5. Establishing an institution exclusively governing character business This study discussed the importance of developing long-lived character appealing not only to the Koreans but also to the whole world, that will meet the requirements as stated in 1 & 2 of above. For this purpose Chungmugong General Lee Soon-shin was chosen out of the Korean historical personages for further analysis, trying to rediscover the significance of the character development based on originality.

• 한국컴퓨터정보학회논문지
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• 제15권10호
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• pp.129-136
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• 2010

본 논문은 2바퀴로 수직 자세를 유지하며 원하는 방향으로 이동할 수 있도록 다수개의 센서를 혼합하여 정확한 각도 정보를 얻을 수 있는 방안과 이를 이용한 로봇주행 방법을 연구하였다. 로봇이 2바퀴로 수직 자세를 취하면 시스템이 안정하기 위하여 항상 앞, 또는 뒤로 넘어지려는 성질을 가진다. 따라서 이를 지속적인 수직상태로 유지하기 위하여 기울어지는 각도 정보가 필요하며 이를 이용하여 기울어지는 방향으로 신속한 자세 제어를 필요로 하게 된다. 본 논문에서는 각속도 정보를 얻을 수 있는 자이로센서와 이를 보상하기위한 방안으로 가속도 센서를 혼합하여 사용하였다. 현재 자이로센서와 가속도센서를 혼합하는 알고리즘은 Kalman Filter가 일반적으로 이용되고 있으며 많은 연구가 진행되고 있다. 그러나 이러한 알고리즘을 수행하기 위해서는 고성능의 DSP 프로세서 및 성능이 우수한 시스템을 요구하고 있다. 본 논문에서는 간단하면서 고 효율의 성능을 발휘할 수 있는 자이로센서와 가속도 센서의 혼합 알고리즘과 PID제어를 이용한 자세제어를 연구하였다.

• 복식
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• 제56권9호
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• pp.14-23
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• 2006

The purpose of this study is to identify the esthetic features of femme fatale character fashions, which are shown in Movie . The feature of evil femineity is the attribute of evil which brings men to ruin by the dangerous, cunning, and cruel trick, and is expressed in black color, red color, and slash fashion. This fashion shows the dark reverse side of women's sexual desire in relation to anxiety, evil, and death. The feature of sensuality evokes physical pleasures or desires, and maximizes the exposure of sexual regions by tightening or loosening women's body. In the fashion expressing this feature, the forms are fit or loose silhouette. and the colors are black and red. and the materials are soft. This fashion seems to deconstruct the past concept of sex consciousness and emphasize the independent and autonomous femineity. The feature of positiveness combines feminine elements with masculine elements in relation to power elements. This feature is expressed in tailored suit and trousers, with few patterns and details, and in black color and gray color. This fashion reflects the aggressive, challenging, and independent femineity, and expresses the potential defense for the weakness and danger of female body. The feature of purity expresses the earnest and truthful mind, and is expressed in the soft and light one-piece dress, the elegant suit, and the pink color and black color fashion. This fashion shows angel-like and reliable womanly beauty, but at the same time shows women's attribute which changes their behavior and thinking every moment, so that this fashion shows women's double-sided attribute which combines women's weakness and violence, or tenacity and conflict.