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Effect of GnRH Immunization on Testicular Function in Colts

  • Tshewang, U.;Dowsett, K.F.;Knott, L.;Jackson, A.
    • Asian-Australasian Journal of Animal Sciences
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    • v.12 no.3
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    • pp.348-353
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    • 1999
  • Ten Australian Stock Horses colts (five yearling and five 3-year old colts) of which 2 yearlings and 2 three year old colts served as control animals while 3 yearlings and 3 three year old colts received two GnRH immunizations within 4 weeks interval were used in this study. By the 5th to 6th week after immunization, the GnRH antibody titres in the plasma rose above 1:1000 and attained peak levels of 1:6500 by the 8th week and gradually declined to about 1:3000 by the 10th week in both the age groups. The testosterone and androstenedione concentrations of the control colts in both age groups were significantly greater (p<0.05) than that of the vaccinated groups. During the immunosuppression period, the vaccinated colts behaved like geldings. Semen could not be collected from 2 of the 3 three-year old vaccinated colts. The testicular dimensions, testicular weight, parenchymal weight, seminiferous tubule volumes, interstitial space volumes, Leydig cell volume, seminiferous tubule % of the control colts were significantly greater than those of the vaccinated colts in both the age groups. The 3-year old control colts had a significantly (p<0.05) greater % of Leydig cells than the control and vaccinated 1-year old colts. There was arrest of spermatogenesis with complete absence of sperm in the testes of the vaccinated colts while there was various stages of spermatogenesis in those of the control colts. Morphometric analysis demonstrated that the 3-year old colts had significantly (p<0.05) greater DSP/gm of testis and DSP/testis than those of the 1-year old control colts. This study elucidated that the GnRH immunization could suppress the testicular function of the 3-year old and yearling colts.

A Study on Double - Punch Test for Tensile Strength of Concrete (Double-Punch Test에 의한 콘크리트의 인장강도 시험에 관한 연구)

  • 이우종;고재군
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.30 no.2
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    • pp.82-94
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    • 1988
  • The purpose of this study is to introduce the Double Punch test method which is an indirect testing method of tensile strength of concrete, and to compare with the tensile strength of concrete as determined by the split-cylinder test, a practical method for performing the Double Punch test to obtain the tensile strength of concrete is proposed and recommended for general use. In this study, the dimensions of cylindrical specimens used in the Double-Punch test were 15X30cm, 15X15cm, 10${\times}$(20cm, and 5${\times}$l0cm, and in the split-cylinder test were 15${\times}$(30cm, 15${\times}$(15cm, and 10${\times}$(20cm. And the diameters of loading punches used in the Double-Punch test were 1.5cm, 2.5cm, and 3.5 cm. The results obtained from tests are summarized as follows ; 1. In the split-cylinder test, the tensile strength of concrete by the linear elasticity theory is similar to that of plasticity theory. 2. Both split-cylinder test and Double-Punch test, tensile strength of concrete is increased with decreasing specimen size. This tendency is identical when the ratio of specimen diameter to height is 1: 2, but that tendency is quite different when the ratio is 1: 3. In the Double-Punch test, if specimen size is constant, by increasing the punch size, tensile strength of concrete is increased, too. 4. Using a 15 ${\times}$( 15 cm cylinder specimen and 3.5 cm diameter punch in the Double Punch test would give the most uniform and consistent result in tensile strength, and the result showed a gQod correlation with splitting tensile strength from 15 x 30cm specimen. 5. In order to obtain satisfactory results and to nuninuze variability, it is proposed that specimens of 15 cm in diameter and 15 cm in height with two 3.5 cm diameter punches should be used. It seems, therefore, reasonable tt) take f't=0.0024 P(kg / cm$^2$) as a working formula for computing the tensile strength in the Double Punch test for concrete.

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A New Model for Connecting the Classification Systems of Knowledge Activities - Linking Research-Technology-Industry and Research-Major-Job - (지식활동의 관계식별을 위한 연계형 분류체계에 관한 연구 - 연구-기술-산업과 연구-전공-취업 연계 -)

  • Seol, Sung-Soo;Song, Choong-Han;Nho, Hwan-Jin
    • Journal of Korea Technology Innovation Society
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    • v.10 no.3
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    • pp.531-554
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    • 2007
  • This paper suggests a new model connecting various knowledge activities through classification systems such as classifications of research, technology, industry, major and job. Although research activities are linked to technology and industry areas or to education and job areas, there is no effort to link these kinds of activities. There are a few studies to link research and technology or research and education respectively. But, there have been no studies to connect technology-industry linkage and education-job linkage. This paper suggests that research area can be a basis of link between technology-industry linkage and education-job linkage. The methods building the links are not simple, but easy; 1) setting up new science/research classification system having two dimensions of research and application, 2) building electronic systems and databases allowing fields for several classification systems, and 3) making rules using multi-dimensional classification systems following the purpose of the programs. The model is designed to meet the needs of nationwide R&D and human resources policies, and for the preparation of knowledge society to grasp the relationship between sequential activities using knowledge. If we know the interactive relationships between various areas, we can trace related phenomena in different activities with restricted information.

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Developing an Evaluation Indicator of Institutional Repositories toward Efficient Distribution Infrastructure of National Knowledge focusing on the dCollection (국가 지식정보의 효율적인 유통체제 구축을 위한 대학 리포지토리 평가 지표 개발: dCollection을 중심으로)

  • Kim Hyun-hee;Kwak Byeong-Heui;Ahn Tae-Kyoung;Chang Woo-Kwon;Lee Soo-Young
    • Journal of Korean Library and Information Science Society
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    • v.36 no.3
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    • pp.85-107
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    • 2005
  • The purpose of this study is to develop an evaluation indicator of institutional repositories to be used by participating university libraries of dCollection. Based on the literature reviews of digital library evaluation, core evaluation measures and criteria were identified. In order to verify the applicability and appropriateness of those evaluation criteria for institutional repositories, two methods were employed: A case study with sixteen university libraries and a Delphi study with twenty university libraries. The results of both studies led the development of an evaluation model which consisted of four evaluation dimensions and 29 criteria. This evaluation model should be utilized as tools for objective assessment and guidelines for improving institutional repository services by universities libraries in which the dCollection is currently Implemented or the future plan of the dCollection is underway.

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The Influence of the Nature of Trust on Commitment and Relational Citizenship Behavior in BtoB Exchanges Relationships (BtoB 관계에서 신뢰의 내용 및 대상 차원이 관계몰입 및 시민행동에 미치는 영향)

  • 최지호;김재욱;이성근;한계숙
    • Journal of Distribution Research
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    • v.9 no.3
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    • pp.97-118
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    • 2004
  • The primary purpose of this research is to develop and test a model that explains the process of how multidimensional trust in a supplier firm and salesperson through relational commitment influence buyer's relational citizenship behavior. The proposed framework uses a multidimensional conceptualization for the trustworthiness construct such as benevolence and credibility and incorporates two distinct facets of consumer trust, namely, organization trust, and salesperson trust. The authors test the proposed model using data from MD in buying finns.. The tests show the differential effect of trust dimensions on relational commitment and citizenship behavior. The authors discuss the implications of the findings for trust-commitment theory and practice.

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The Effects of Chinese Coffee Shop Customers' Happiness on Continuous Usage Intention (중국 커피 전문점 이용고객의 해피니스가 지속이용의도에 미치는 영향에 관한 연구)

  • An, Shengnan;Zhang, Jun
    • The Journal of Industrial Distribution & Business
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    • v.10 no.3
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    • pp.25-33
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    • 2019
  • Purpose - With the economic development in China, the lifestyle of Chinese customers has changed dramatically. Chinese customers are more likely to have coffee in a shop with the ability to make them happy than those with high quality coffee in a nice physical environment. Happiness becomes a critical driver of customers' intention to purchase a cup of coffee in a specific coffee shop again and again. As a result, happiness becomes an important factor for managers to make strategies for attracting customers. Although managers and scholars pay more attention to emphasize the importance of happiness in customers' consumption, little research has been conducted to investigate the relationship between happiness and coffee shop's continuous usage intention in the Chinese coffee industry. Research design, data, and methodology - A research model is made to explain the impact of happiness on customer's behavior. To understand the influence of happiness better, we consider two dimensions of happiness which are subjective well-being and psychological well-being. In order to confirm the relationships of the variables in the research model, the online survey is constructed in China. Customers who have experienced the services in a coffee shop are asked to do the questionnaire. With 453 reliable questionnaires, structural equation modeling is used to analyze the causal relationships of the coffee quality, physical environment, subjective well-being, psychological well-being, and continuous usage intention. Results - Results indicate that coffee quality and physical environment are not the direct factors that influence customers' continuous usage intention. However, good coffee quality and physical environment are the significant predictors of Chinese customers' happiness associated with subjective well-being and psychological well-being, which in turn affects customers' continuous usage intention. Conclusions - In this study, it is proposed that coffee quality and physical environment may be the key factors influencing customers' happiness. Happiness, including subjective well-being and psychological well-being matters in decision making process. More importantly, happiness increases the continuous usage intention when the coffee shop can serve customers with higher quality coffee at a good atmospheric place. Managers should consider happiness as an important factor in making marketing strategies to compete in this industry.

Analysis for Typicality of the Leading Brand by Evaluation of Brand Personality (브랜드 개성 평가를 통한 선도브랜드의 전형성 분석 연구)

  • Park, Pumsoon
    • The Journal of the Korea Contents Association
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    • v.18 no.3
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    • pp.568-577
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    • 2018
  • This study investigated the typicality of the leading brand in a specific product category through comparison of personality evaluation. Measuring scales for brand personality was also used to measure the product category's personality which consumers expected generally. By pre-test, an instant coffee category was selected for product category. In the instant coffee category, three brands-'kanu', 'looka', and 'supremo'-were analyzed for this study. As a result, it was found that the leading brand, kanu had the typicality for the instant coffee category. Kanu had the same dimensions of brand personality, which were sincerity, competence, success, and sophistication, as the instant coffee product category had. Comparatively, looka had just three personalities -competence, sincerity, and sophistication-which were similar to personalities in the product category. And, supremo had only two personalities-sophistication and competence-which were similar to personalities in the instant coffee category.

The Effects of Technology Readiness and Situational Influences on Attitude and Usage Intention of Self-Service Technology (기술준비도와 상황적 영향이 셀프서비스기술 태도 및 사용의도에 미치는 영향)

  • Mun, Cheon-Su;Shin, Yong-Ho
    • Journal of the Korea Society for Simulation
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    • v.25 no.2
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    • pp.93-100
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    • 2016
  • The purpose of this study is to investigate the impacts of individual difference toward technology and situational influences on use intention of Self-Service Technology. While the previous research related to SSTs focuses on individual tendency toward technology, little research has been done on the impact of situational influences on usage intention of SSTs. This study proposed Technology Readiness Index for measuring individual tendency toward technology and categorized situational influences into two dimensions: location convenience, employee presence. The empirical testing of the research was conducted on 20' users who have prior experience in using SSTs except for ATMs in bank. This study demonstrated that the people who are favorable emotions positively affect SSTs. Also this study confirmed that it is effective to build strategies to form favorable attitude and usage intention of knowledge of SSTs rather than method through service employees. Finally, SSTs were distributed for customers.

Simulation Study on the Thickness Uniformity of Thin Film Deposited on a Large-Size Substrate in Multi-Source Evaporation System (다중소스 진공증착법에서의 대면적 박막균일도에 관한 전산모사 연구)

  • Kim, Chang-Gyu;Lee, Won-Jong
    • Korean Journal of Materials Research
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    • v.21 no.1
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    • pp.56-66
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    • 2011
  • Multi-source evaporation is one of the methods to improve the thickness uniformity of thin films deposited by evaporation. In this study, a simulator for the relative thickness profile of a thin film deposited by a multi-source evaporation system was developed. Using this simulator, the relative thickness profiles of the evaporated thin films were simulated under various conditions, such as the number and arrangements of sources and source-to-substrate distance. The optimum conditions, in which the thickness uniformity is minimized, and the corresponding efficiency, were obtained. The substrate was a 5th generation substrate (dimensions of 1300 mm ${\times}$ 1100 mm). The number of sources and source-to-substrate distance were varied from 1 to 6 and 0 to the length of the major axis of the substrate (1300 mm), respectively. When the source plane, the area on which sources can be located, is limited to the substrate dimension, the minimum thickness uniformity, obtained when the number of sources is 6, was 3.3%; the corresponding efficiency was 16.6%. When the dimension of the source plane is enlarged two times, the thickness uniformity is remarkably improved while the efficiency is decreased. The minimum thickness uniformity, obtained when the number of sources is 6, was 0.5%; the corresponding efficiency was decreased to 9.1%. The expansion of the source plane brings about not only the improvement of the thickness uniformity, but also a decrement of the efficiency and an enlargement of equipment.

The Effects of MMORPG User's Stress Coping Strategies on Continued Use Intention Through Self-Control and Behavioral Adaptation (MMORPG 이용자의 스트레스 대처전략이 자기통제감과 행동적 적응을 통해 지속적인 게임 이용의도에 미치는 영향)

  • Lee, Ji-Hyeon;Kim, Han-Ku
    • The Journal of Information Systems
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    • v.29 no.3
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    • pp.53-75
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    • 2020
  • Purpose Despite the continued rise in the popularity of mobile MMORPGs, the previous studies mainly focused on negative results of playing MMORPG such as violence and game addiction. In addition, previous studies that verified game play motives were not enough to explain user's fundamental motives for MMORPG play. To verify the positive role of playing MMORPG, this study focused on stress coping strategies on continued play MMORPG, and divided factors into two dimensions: escapism and coping with system. The purpose of this study is to comprehensively identify the discriminatory effects of each factor on users' self-control, and the effect of self-constrol and behavioral adapatation on continued use intention for MMORPG. Design/methodology/approach This study was designed to examine the structural relationships among MMORPG users' escapism, system coping, self-control, behavioral adaptation and continued use intention for MMORPG. Findings The results from this study are as follow. First, the participants' effect-based escapism had a positive impact on self-control, whereas cause-based escapism had a negative impact on self-control. Next, proactive coping and reactive coping for system problem had a positive impact on self-control. In addition, Self-control had a positive impact on behavioral adaptation and continued use intention for MMORPG. Lastly, the behavioral adaptation to MMORPG had a positive impact continued use intention. The results of our study can suggest the positive effects of coping strategy on users' self-control and behavioral adaptation by applying the theory of both escapism and coping with system. Based on our results, game companies should develop contents that can gratify users' coping motives and enhance self-control and behavioral adaptation.