• 한국생산제조학회지
• /
• 제22권1호
• /
• pp.112-118
• /
• 2013

Formula race car is generally recognized as a vehicle which is optimally designed for on-road race track with the regulations of race host bodies. Especially, the uprights of suspension system decisively have effects on the performance of cornering and stability of race car's driving performance, which are very important factors in the design of race car. This paper is a study of optimal upright design of F1800 grade formula race car which are normally used in professional race circuit in Korea. To design optimally the front upright of F1800 formula race car, Taguchi's orthogonal array, which is known for more useful method than full factorial design experimental method in cost and time, is used with CAE method such as FEM analysis. And the result of this paper shows that Taguchi's orthogonal array employed for this optimal design is very useful for designing the front upright of race car by minimizing its weight as well as keeping its safety factor as enough as designer wants in the view of quality, cost and delivery at the early design step.

• 한국사회복지학
• /
• 제61권2호
• /
• pp.215-246
• /
• 2009

본 연구에서는 점차 다문화 되어가는 한국사회에서 혼혈인에 대한 인식과 태도가 어떠한 양상으로 나타나고 있으며, 이러한 인식과 태도에 영향을 미치는 요인은 무엇인지, 그리고 이것이 혼혈인에 대한 차별행위에 어떠한 영향을 미치는지를 낙인개념에 근거하여 살펴보았다. 이를 위해 서울을 비롯한 수도권 지역에 거주하는 성인 남녀를 대상으로 설문조사를 실시하였다. 분석결과에 의하면, 혼혈인에 대한 인식과 태도는 백인 혼혈인, 아시아계 혼혈인, 흑인 혼혈인 세 유형 모두에서 전반적으로 부정적이지는 않았지만 그리 긍정적이지도 않은 것을 볼 수 있었다. 또한 혼혈인에 대한 인식과 태도는 혼혈인 유형에 따라 부분적으로 차이를 보이는 것으로 나타났는데, 대체로 백인 혼혈인 보다 아시아계 혼혈인과 흑인 혼혈인에 대해 그리고 흑인 혼혈인보다 아시아계 혼혈인에 대해 덜 긍정적인 인식과 덜 호의적인 태도를 보이는 것으로 나타났다. 혼혈인에 대한 인식과 태도에 영향을 미치는 요인과 관련하여, 인종주의는 세 유형의 혼혈인 대한 인식과 태도 모두에 공통으로 영향을 미치는 요인이었으며, 자민족중심주의/세계주의 성향은 백인 및 흑인 혼혈인에 대한 인식과 백인 및 아시아계 혼혈인에 대한 태도에 유의미한 영향을 미치는 요인인 것으로 나타나 인종주의와 자민족중심주의/세계주의가 혼혈인에 대한 낙인에 영향을 미치는 주된 요인이라는 것을 알 수 있었다. 또한, 세 유형의 혼혈인 모두에서 혼혈인에 대한 태도는 차별행위에 유의미한 영향을 미치는 것으로 나타났으나 혼혈인에 대한 인식은 흑인의 경우에 있어서만 차별행위에 유의미한 영향을 미치는 요인인 것으로 나타났다. 이러한 결과는 한국사회에서 혼혈인의 복지를 향상시키기 위해 보다 근본적인 차원에서 어떠한 노력이 필요한지 이에 대한 논의의 근거를 제공해 준다.

• 한국콘텐츠학회논문지
• /
• 제6권5호
• /
• pp.161-169
• /
• 2006

본 논문은 스포츠 이벤트(2005 제천 산악마라톤 대회) 개최로 인한 사회문화적 영향요인분석을 실증분석 하였다. 연구결과는 다음과 같다. 요인분석결과 긍정적 영향에 대한 19개의 질문 항목이 5개의 요인으로 나타났고, 부정적 영향에 대한 9개의 질문 항목이 2개의 요인으로 나타났다. 구체적으로 $20\sim30$대의 젊은 연령층과 서비스산업종사자들은 긍정적 영향을 많이 받은 것으로 나타났다. 이는 스포츠 이벤트의 긍정적 영향 요인이 나이와 직업에서 의미 있는 차이가 있음을 보여준다. 그러므로 스포츠 이벤트에 대한 사회 문화적 특징은 지역사회 구성원에게 서로 다른 영향을 미치고 있다.

• 한국해양바이오학회지
• /
• 제1권2호
• /
• pp.119-125
• /
• 2006

어류의 insulin-like growth factor-I (IGF-I)의 생화학적 작용기작을 연구하기 위하여 한국산 조피볼락의 IGF-I cDNA 유전자 cloning을 행하였다. 완전한 cDNA 유전자 염기서열은 PCR과 RACE 방법을 통하여 얻어진 DNA로부터 결과를 얻을수 있었다. 결정된 IGF-I의 염기서열은 flounder, chinook salmon, human IGF-I의 염기서열과 비교한 결과 각각 93.6%, 90.7%, 85.4%의 높은 상동성을 보였다. 생화학적으로 활성이 있는 재조합 IGF-I을 얻기 위하여 IGF-I의 B-C-A-D domain 부분을 PCR로 얻은 뒤 E. coli BL21(DE3)에 넣어 overexpression 시켰다. Ni-NTA colummn을 사용하여 순수한 재조합 단백질을 정제할수 있었다. 정제된 단백질은 SDS-PAGE 상에서 7 kDa의 단일 band를 보여 주었으며 [$^3H$]-thymidine 결합정도를 측정하는 방법으로 활성을 가지고 있음을 확인할수 있었다.

• 한국기계가공학회지
• /
• 제10권5호
• /
• pp.85-90
• /
• 2011

In this paper a design procedure via computer-aided molding simulation is presented to optimize the air-trap locations in a speaker encloser of mobile phone. The molding flow simulation reveals that the race-tracking phenomenon is the dominant feature in the current mold design. In obtaining an optimal filling pattern, the local modifications of the wall thickness such as in a flow leader attachment are considered as the primary control factor, and both the gate position and the filling time become the secondary control factor. In the one-at-a-time approach, the last location to be filled in the mold cavity could be successfully moved to the extremities of the part, allowing a natural ventilation of entrapped air through the mold parting plane.

• 가정과삶의질연구
• /
• 제15권4호
• /
• pp.65-80
• /
• 1997

Korean-American and American adolescents' attitudes toward the elderly(OP Scale) and their perception on the generational difference(GN GAP) were compared to find whether there is a difference according to the race. Adolescents' perceived generational gap was considered to be one of the most influential factor affecting their attitudinal differences. Adolescents regardless of face showed a somewhat positive attitudes toward the elderly and they perceived generational gap a little positively. Adolescents' age and sex were found not to be related with their attitude toward the elderly and generational gap. For the Korean-Americans birth-order was negatively related to the generational gap perception. the quality of relationship with grandparents was the crucial factor influencing adolescents' perceptions on generational gap and their attitudes toward the elderly indirectly. Grandparents' health and age affected on the quality of relationship. Additionally adolescents' favorite g andparent was found to be maternal grandmother and their relation style and conflict areas were different according to the race.

• Molecules and Cells
• /
• 제45권11호
• /
• pp.789-791
• /
• 2022

Targeting fibroblast growth factor receptors (FGFRs) has been slow compared to other targeted cancer therapies for receptor tyrosine kinases, such as epidermal growth factor receptors. The low efficacy and variable response have limited the growth of FGFR inhibitors in clinical use. Nevertheless, recent systematic and genomic approaches have identified the biological conditions for effectively targeting FGFRs and can accelerate the development of targeted drugs. Under clinical and preclinical trials, the inhibitors started fast growing furious races to target FGFRs. Finally, FGFRs will be more actionable and targetable with more precise and effective drugs at the end of the race, passing the finish line.

• Nutrition Research and Practice
• /
• 제1권3호
• /
• pp.218-223
• /
• 2007

This study investigated: 1) what weight-related behaviors college students practiced; 2) if the behaviors were performed for weight-related reasons; and 3) whether the behavioral practices differed by gender, race, and body weight status. This cross-sectional study used a questionnaire to collect information from a non-probability sample of undergraduate students (n=379; 48% men) recruited from large introductory psychology classes. Chi-square tests were conducted to examine simple comparisons, and multiple logistic regression analyses assessed differences. Male students reported adopting significantly fewer weight-related behaviors than females. Most frequently males increased exercise (69.2%), increased fruit and vegetable consumption (50%), skipped meals (46%), cut out sweets and junk foods (40%), and cut out between-meal snacks (35%). Female students most frequently increased exercise (67.4%), skipped meals (63%), increased fruit and vegetable consumption (62%), reduced the amount of food eaten (60%), and cut out between-meal snacks (51%). Negative behaviors were engaged in by only a few participants. Weight-related reasons were a significant factor for weight-related behavior adoption. Multiple logistic regression analyses showed that gender was consistently and significantly associated with the adoption of weight-related behaviors, while race and weight status were less consistently associated. Findings of this study will be helpful to dietitians who counsel college students. Results of this study may support effects to bring more comprehensive behaviorally-focused health md nutrition interventions to college campuses.

• 한국해양공학회지
• /
• 제28권4호
• /
• pp.314-323
• /
• 2014

In this study, a gearbox and blade were modeled in the MASTA program, and the housing and carrier components were modeled using a finite element method. Using substructure synthesis, all the components were combined and used to establish a vibration model of a 2.5-MW wind turbine gearbox. In addition, the safety displacement factor was evaluated using an AGMA data sheet about bearing's outer race for the input shaft and output shaft. As a result, the bearing's outer race for the input shaft, and the radial and axial responses were satisfied by the $1^{st}$ and $2^{nd}$ planetary gears and the $3^{nd}$ helical gear transmission error(TE), respectively. However, the output shaft support bearing's outer race responses were not satisfied with the radial response by the $2^{nd}$ TE and axial response by the $3^{rd}$ TE. To reduce the vibration, tooth modification was needed. After profile tooth modification, at the outer race of the output shaft support bearing, the radial response was reduced by approximately $20{\mu}m$, and the axial response was reduced by approximately $6{\mu}m$.

• Tribology and Lubricants
• /
• 제18권3호
• /
• pp.187-193
• /
• 2002

The half-value breadth off-ray diffraction profile line is generally used for a factor in nondestructive hardness measuring method of steel. In this paper, the problem in using the half-value breadth for the hardness measuring method is evaluated in strain hardened steel. And new hardness measuring method using residual stress is proposed X-ray diffraction test after rolling contact fatigue test of ball bearing with inner race of various hardness are carried out to measure the distribution of residual stress and half-value breadth from surface. The result of this study shows that there is little correlation between half-value breadth and hardness in the higher strength region and in the region increasing the hardness by strain hardening. But the magnitude of residual stress on/under race after rolling contact fatigue test becomes clearly to be correlative with hardness. Thus, it is concluded that the hardness of strain hardened steel can be estimated by this relationship between residual stress and hardness.