• 대한수학회지
• /
• 제49권6호
• /
• pp.1123-1138
• /
• 2012

We study some anisotropic boundary value problems involving variable exponent growth conditions and we establish the existence and multiplicity of weak solutions by using as main argument critical point theory.

• 셀메드
• /
• 제4권2호
• /
• pp.14.1-14.6
• /
• 2014

KH-BaRoKer-SeongJangTang (KBS) is a recently developed formulation by using traditional drugs considering traditional medical theory of Oriental books such as ShinNongBonChoGyeong and JuRye, which has been used to improve the growth of child in Korea. Although KBS is usually prescribed to many children who are in retard for their age, its pharmacological effects have not been fully understood in experimental models. The aim of this study was to evaluate the effects of KBS on bone growth. Growth plate thickness and bone parameters such as bone volume/tissue volume (BV/TV), trabecular thickness (Tb.Th), trabecular number (Tb.N), connection density (Conn.D), and total porosity were analyzed by means of microcomputed tomography. Serum insulin-like growth factor-I (IGF-I) levels were measured by enzyme-linked immunosorbent assay. Hepatic IGF-I mRNA expression was analyzed by real-time polymerase chain reaction. Phosphorylation of signal transducer and activator of transcription5 (STAT5) was investigated using Western blot analysis and immunohistochemistry. The thickness of growth plate was increased by KBS. BV/TV, Tb.Th, TbN, Conn.D, and total porosity were improved by KBS. Hepatic IGF-I mRNA and serum IGF-I levels were elevated by KBS. Phosphorylation of STAT5 was increased with administration of KBS. These results suggest that KBS would be helpful to children who are in retard for their age through the elevation of IGF-I.

• Journal of the Korean Data Analysis Society
• /
• 제20권6호
• /
• pp.2981-2991
• /
• 2018

본고에서는 축제-지역경제성장 관계의 실증분석을 통해, 지역축제가 지역경제성장에 미치는 영향을 확인하는 것을 목적으로 하고 있다. 이론적으로 축제가 경제성장에 영향을 줄 수 있는 경로에 대해서는 창조경제론이 논의의 중심에 있다. 축제의 지역경제성장에 대한 영향을 실증적으로 분석하기 위하여 지역의 소득수렴식을 이용하였고, 추정방법으로는 pooled OLS, 고정효과모형, GMM 추정방법을 사용하였다. 축제변수가 생산성에 영향을 주어 지역의 경제성장률에 영향을 주는 모형을 설정하여 이를 실증분석 하였다. 실증적 분석에 따르면, 축제의 수나 기간 등의 축제변수가 경제성장에 미치는 영향은 지금까지는 유의적이지 않은 것으로 분석되었다. 축제변수로는 축제의 수와 축제기간을 이용하였다. 축제변수가 선형적이든 비선형적이든 소득수렴식에서 성장률에 유의적으로 영향을 주지는 않은 것으로 추정되었다. 이는 축제가 생산성이나 효율성에 미치는 영향이 지금까지는 존재하지 않았다는 것을 시사한다. 이는 지역축제가 창조경제를 자극하여 지역의 경제성장에 영향을 줄 것이라는 창조경제론이 지역축제에서는 작동하지 않았음을 제시하는 것이다.

• 한국원자력학회:학술대회논문집
• /
• 한국원자력학회 2001년도 춘계학술발표회요약집
• /
• pp.541.2-541
• /
• 2001

• 한국해양공학회지
• /
• 제28권2호
• /
• pp.147-151
• /
• 2014

This research presents a method for the initial structural design of a multi-megawatt wind turbine blade. The structural data for a 2-MW blade were applied as the blade structural characteristic data of the reference blade. Tenkinds of blade models were newly designed by replacing the spar cap axial GRRP with a GFRP and CFRP These terms should be defined. at different orientations. The axial stiffness coefficients of the newly designed models were made equal to the coefficient of the reference blade. The required numbers of layers in each section of blades were calculated, and the lay-up designs were based on these numbers. Verification results showed that the design method that used the structural data of the reference blade was appropriate for the initial structural design of a wind turbine blade.

• 대한기계학회논문집
• /
• 제14권6호
• /
• pp.1552-1560
• /
• 1990

본 연구에서는 로터강(Cr-Mo-V 강)과 저탄소합금강(A517-F강)의 CT시험편을 대상으로 한 고온피로 시험결과를 토대로 차원해석법을 도입시켜 고온하의 균열성장률 을 유도한 다음 온도(T)와 응력확대계수범위(.DELTA.K,T)인 아레니우스 형태의 식을 유도하 였다.그리고 유도된 균열 성장 법칙을 파리스식과 비교 검토하여 본 연구에서 유도 된 이 균열성장법칙의 타당성을 검토하고자 한다.

• 한국농공학회논문집
• /
• 제49권1호
• /
• pp.35-42
• /
• 2007

This paper develops a Sustainable Regional Economic Growth Model (SREG) which estimates the relation of labor population change and employment increase in each occupation and maximum limits and minimum requirements of employment increase by labor population change in a specified region using multiplier theory. To develop the proposed model, sustainable regional economic growth is defined as a steady increase of labor population over a long term period and the limit of employment increase is defined as the estimated labor population change in the region with no need for commutation from the surrounded areas. Developed model was applied to 67 county in Pennsylvania State and the results revealed that the investment in infrastructure occupations, such as transportation, warehousing, utilities, information, communication, and other public utilities, maximizes the effects for increasing employment, whereas finance, insurance, and real estate occupations have minimum effects for increasing employment. Calculated minimum requirements of occupations show that infra-structure occupations is a critical factor for labor population change and maximum limits of occupations show that agriculture and finance occupations are difficult to increase independently.

• The Journal of Asian Finance, Economics and Business
• /
• 제8권7호
• /
• pp.433-446
• /
• 2021

This study aims to identify the elasticities and casualties of financial performance and determinants of the mining and extractive companies listed in Jordan's stock market over the 2005-2018 period. The conceptual framework is based on the Resource-Based View theory and Arbitrage Pricing theory is used to describe the relationship between the external environment and the financial performance of the companies. Profitability ratio (return on assets) is utilized as a proxy of financial performance measurement. Meantime, the company's characteristics, macroeconomic variables, and non-economic factors are utilized as independent factors. Data sources are panel data set for mining and extractive companies over the above period. Fully Modified Ordinary Least Square (FMOLS), Dynamic Ordinary Least Squares (DOLS), and Pooled Mean Group (PMG) methods are applied. The empirical findings indicated that company size, sales growth, financial leverage, liquidity, and GDP growth were the critical determinants of mining and extractive companies' financial performance in the Amman Stock Exchange. Thus, the findings conclude that company characteristics and GDP growth mainly drive financial performance. Moreover, the findings reveal that a bidirectional causal elasticity exists between GDP and financial leverage and return on assets (ROA). Sound financial performance can be obtained by paying more attention to GDP growth and firms' characteristics.

• 한국결정성장학회지
• /
• 제9권6호
• /
• pp.558-562
• /
• 1999

승화 성장법을 적용하여 성장된 6H-SiC 결정에 대하여, KSV 이론과 성장 계면에서의 미사면(vicinal plane)상의 step 성장 양상을 근거로 하여, 성장 계면에서의 물질 흡착의 거동과 결함의 생성간의 상호 관계를 고찰하고, micropipes와 내부 결함의 생성 원인을 논하였다. micropipe와 면결함등의 결함들은 ledge 혹은 kink에 침입된 불순물에 의하여 step 성장의 진행이 방해받는 부분에 형성되었다. 따라서, SiC 결정에서 이들 결함의 생성은 SiC 결정 성장 계면에 형성되는 결정학적 step 성장면과 분자 또는 원자들의 격자 이동에 관련이 있음을 알 수 있었다.

• Asia pacific journal of information systems
• /
• 제28권1호
• /
• pp.36-60
• /
• 2018

As an increasing number of people gained access to social network services (SNS), organizations started to use SNS as a channel for marketing and promotional purposes. The online advertising market has significant growth potential. Brand engagement is a key motive for online advertising, but how SNS users engage with brands, particularly in terms of the promotion of organizations, is poorly understood. This study uses customer value theory to examine brand engagement of users in terms of promoting companies in the context of Korean SNS marketing. This study identifies the antecedents of brand engagement based on customer value theory. Our findings show the significance of three factors of SNS marketing, namely, price discount, relationship support, and convenience, on brand engagement. We further show the consequences of brand engagement, namely, purchase decisions and word-of-mouth activities. These findings help advance customer value theory and offer practical insights into the use of information systems and marketing in the context of SNS.