• 콘크리트학회논문집
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• 제23권4호
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• pp.405-411
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• 2011

철근콘크리트 구조물의 보강에 자주 사용하는 탄소 섬유나 유리 섬유 대신에 이 두 가지 섬유를 동시에 사용하여 하이브리드 효과를 얻기 위한 연구를 시도하였다. 하이브리드 효과를 얻기 위해서는 탄소 섬유와 유리 섬유를 적절한 비율로 조합해야 되며, 이러한 비율로 제작된 실험체를 이용하여 하이브리드 FRP 직접 인장 실험을 수행할 수 있다. 하이브리드 FRP 실험체는 직조된 섬유 시트를 이용하는 현장과 다르게, 섬유를 직접 조합해야 하는 이유로 작업이 쉽지 않다. 따라서 이 연구에서는 고강도 탄소 섬유와 E형 유리 섬유의 조합에 따른 1축 직접 인장 실험체의 제작 방법을 제안하여 실험을 통하여 하이브리드 효과를 분석하였다. 하이브리드 FRP로 가장 적합한 섬유 조합은 연성 지수, 탄성계수 및 응력-변형률 곡선을 비교한 결과 연성 K형 에폭시를 사용한 유리 섬유 : 탄소 섬유 = 9 : 1(체적비)가 가장 적합한 것으로 평가되었다.

• 한국콘텐츠학회논문지
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• 제14권1호
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• pp.150-157
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• 2014

본 논문은 현재 출간된 아동영문어휘책의 현황분석을 통해 그림과 문자의 관계적 속성을 이해하고 사용자인 아동을 고려해 시각적 심상을 얼마나 잘 활용하고 있는가를 파악하고자 하였다. 이에 아동영문어휘책에 사용된 그림의 유형과 그림의 활용도, 그림과 문자의 결합 형태, 그림과 문자와의 의미일치도 정도를 살펴보았다. 분석결과 그림의 활용도는 일러스트, 만화, 일러스트와 만화의 혼용 순으로 전반적으로 높은 것으로 나타났다. 그림과 문자의 결합 형태에서는 그림+어휘형, 일러스트가 없는 문자형, 그림문자형 순으로 나타났다. 특히나 그림과 문자의 의미일치도가 높을수록 학습에 효과적인데 반해 의미일치도는 전반적으로 낮게 나타났다. 의미일치도가 높게 나타난 5개의 그룹 중 그림문자형이 가장 높은 결합형태 빈도를 보이고 있었다. 따라서 현재 출간된 아동영문어휘책에 나타난 그림과 문자의 제시형태는 비슷한 형태로 출판사별로 출간되고 있음을 알 수 있었고 아동의 다양한 수준을 바탕으로 한 효과적인 디자인연구가 필요하다고 보아진다.

• 정보처리학회논문지B
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• 제10B권7호
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• pp.777-784
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• 2003

본 논문에서는 다중 신경망을 이용한 인식단위 결합 기반의 인쇄체 문자인식 방법을 제안한다. 입력 문자영상은 한글 문자 형식 6가지와 한글 이외의 기타 문자 형식의 전체 7가지 형식으로 분류되어 인식된다. 한글 문자는 2단계의 MLP 신경망 인식기에 의해 인식된다. 첫째 단계에서는 한글 문자를 자소의 조합 형태에 따라 2개 또는 3개의 인식단위로 나누고, 각 인식단위에서 추출된 방향각도 특징 벡터를 입력으로 하는 MLP 신경망으로 1차 인식한다. 둘째 단계에서는 첫째 단계의 인식단위별 MLP 신경망 인식기의 인식양상 특징을 추출하고 다른 MLP 신경망에 입력하여 최종 한글 문자인식을 한다. 한글 이외의 기타 문자의 인식을 위해서는 단일 MLP 신경망을 사용한다. 인식 실험에서는 실제 우편물 50,000통 영상으로부터 추출한 문자영상 데이터베이스를 이용하였는데, 실험 결과 본 논문에서 제안한 방법이 매우 우수함을 알 수 있었다.

• Asian-Australasian Journal of Animal Sciences
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• 제26권5호
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• pp.705-710
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• 2013

This study was conducted to determine the effects of three different fat sources and their combination on growth performance, carcass traits and intestinal measurements of broiler chickens reared to 42 d of age. Two hundred day-old male broiler chicks (Ross 308) were randomly assigned to one of five treatments with four replicates of 10 chicks based on a completely randomized design. The dietary treatments consisted of 4% added fat from three different sources and their combination as follows: T, diet containing 4% tallow; CO, diet containing 4% canola oil; SFO, diet containing 4% sunflower oil; TCO, diet containing 2% tallow+2% canola oil; TSFO, diet containing 2% tallow+2% sunflower oil. Dietary fat type affected significantly BW and gain as well as feed efficiency in birds fed the TCO diets compared with those fed the other diets. Dietary fat type also modified meat yield, resulting in a higher breast and drumstick yields in the birds fed TCO and TSFO diets, respectively. Most of internal organ relative weights and small intestine measurements were not influenced by dietary treatments, except for the abdominal fat pad weight that was lower in birds fed SFO and for small intestinal length that was influenced by fat source. Results from the current study suggested that the supplementation with a combination of vegetable and animal fat sources in broiler diet supported positively growth performance and carcass parameters.

• 한국임상약학회지
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• 제29권4호
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• pp.254-266
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• 2019

Background: Patients with cardiovascular risks are recommended to use statins and antiplatelet agents to prevent major cerebro-cardiovascular events (MACCE). Antiplatelet agents also possess anti-inflammatory and antioxidant effects, in addition to their inhibitory activity on platelets. The differences in clinical outcomes in ischemic heart disease (IHD) based on the type of antiplatelet therapy combined with statin treatment were investigated in this study. Methods: We conducted a retrospective cohort study using electronic medical records of IHD patients from January 2010 to December 2014 at Ajou University Hospital. Patients on combination therapy of antiplatelet drugs and statins were grouped based on antiplatelet drug types: clopidogrel, cilostazol, or sarpogrelate. Propensity score matching was applied to balance the baseline of the groups of clopidogrel vs. cilostazol and the groups of clopidogrel vs. sarpogrelate. The incidence and risk of MACCE as primary outcomes were assessed between the groups of antiplatelet drugs. Results: Among the approximately 128,500 patients with IHD, 1,049 patients had taken a combination therapy of statin and antiplatelet agents. The cohorts of patients administered clopidogrel, cilostazol, or sarpogrelate were 906, 79, and 64, respectively. The incidence of MACCE was not significantly different among the cohorts (p=0.58), and there were no differences between clopidogrel vs. cilostazol (p=0.72) or clopidogrel vs. sarpogrelate (p=1.00) after propensity score matching. Conclusion: There was no difference in the incidence of MACCE based on the type of antiplatelet drug (clopidogrel, cilostazol, or sarpogrelate) in combination with a statin in patients with IHD.

• Parasites, Hosts and Diseases
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• 제53권2호
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• pp.227-232
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• 2015

Genetic polymorphisms of pvdhfr and pvdhps genes of Plasmodium vivax were investigated in 83 blood samples collected from patients in the Philippines, Bangladesh, and Nepal. The SNP-haplotypes of the pvdhfr gene at the amino acid positions 13, 33, 57, 58, 61, 117, and 173, and that of the pvdhps gene at the positions 383 and 553 were analyzed by nested PCR-RFLP. Results suggest diverse polymorphic patterns of pvdhfr alone as well as the combination patterns with pvdhps mutant alleles in P. vivax isolates collected from the 3 endemic countries in Asia. All samples carried mutant combination alleles of pvdhfr and pvdhps. The most prevalent combination alleles found in samples from the Philippines and Bangladesh were triple mutant pvdhfr combined with single mutant pvdhps allele and triple mutant pvdhfr combined with double wild-type pvdhps alleles, respectively. Those collected from Nepal were quadruple mutant pvdhfr combined with double wild-type pvdhps alleles. New alternative antifolate drugs which are effective against sulfadoxine-pyrimethamine (SP)-resistant P. vivax are required.

• 융복합기술연구소 논문집
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• 제5권2호
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• pp.1-6
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• 2015

Flying Saucer(flying disk type UFO) is a rotating disk that flies through the air. Thus, the aerodynamical features of the Flying Saucer can be estimated by taking a close look on the aerodynamics of the rotating disk. In the present paper, the aerodynamics of the rotating disk are reviewed focusing on the their application to the possibility of the UFO type VTOL aircraft. Finally, a combination of Avro Aircraft and Frisbee concepts is suggested as a possible new UFO type VTOL aircraft.

• 한국실내디자인학회논문집
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• 제14권2호
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• pp.128-134
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• 2005

This dissertation is about a study on the space planning of take-out coffee shops grouped by type. The classification is based primarily on stand-alone shop, which runs independently, and shop in shop, located inside of another shop with different industry. And its subdivision is characterize by 3 types: Combination type has not only space to enjoy coffee as we can usually see in conventional coffee shops, but also a counter where take-out coffee is served. Separation type has space for drinking coffee and an external booth for easy buy. Booth type is a booth itself or driving (cruising) booth. In conclusion, some take-out coffee shop are exampled and space analysis is made with analytic tools, such as people of preference, location evaluation, functional space division, dimension per person, and planning of traffic line.

• 대한수학회보
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• 제45권4호
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• pp.763-780
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• 2008

An Ostrowski type inequality is developed for estimating the deviation of the integral mean of an absolutely continuous function, and the linear combination of its values at k + 1 partition points, on a segment of (real) linear spaces. Several particular cases are provided which recapture some earlier results, along with the results for trapezoidal type inequalities and the classical Ostrowski inequality. Some inequalities are obtained by applying these results for semi-inner products; and some of these inequalities are proven to be sharp.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2008년도 춘계학술대회논문집
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• pp.196-201
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• 2008

This paper is about electromagnetic vibration source in outer rotor type of BLDC motors. Experiments are carried out with three pole-slot combinations which are 6 slots, 12 slots, and 24 slots with 4 poles rotor. According to results, vibration sources separate into electromagnetic and mechanical factors. Using the finite element method (FEM), It is analyed that vibration characteristics of electromagnetic source in each type. This paper shows electromagnetic sensitivity to vibration, and introduces necessary point in lower vibration motors. Also rotor balance is important to prevent uneven distribution of magnetic flux between rotor and stator.