• 한국관개배수논문집
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• 제18권1호
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• pp.25-32
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• 2011

In order to effectively manage the reservoir, reservoir water quality management should be based on physicochemical and configurational characteristics. In this research, correlation between factors affecting the reservoir water quality was examined. Chl-a and COD shows the highest positive correlation. Chl-a and T-P also has a high positive correlation, however Chl-a and T-N show lower correlation relatively. Even though T-N is an important factor for phytoplankton growth which increase Chl-a concentration, corelation of Ch1-a and T-N shows that enough nitrogen in the reservoir isn't no longer limiting factor. The age of reservoir can cause of increasing COD and SS. Embankment height and elevation of reservoirs shows strong negative correlation to water quality. That means reservoir which is higher embankment height and locate in higher elevations is less contaminated. Regression expression was derived with Chl-a and water quality parameters, and height of reservoir. Finally Chl-a was simulated using regression expression and it was a good approach to predict the Chl-a concentration.

• Bulletin of the Korean Chemical Society
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• 제20권11호
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• pp.1269-1276
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• 1999

Metallocenes, whether using a cocatalyst or not, act as catalysts in ethylene polymerization. The positive charge on the transition metal of a metallocene might have an important role in polymerization as an active site in our model approach. Using semiempirical calculations in the absence of cocatalyst, we show one of the possibilities that the positive charge on a metallocene might be more easily transferred through the Cp ring of a ligand to the ethylene than to transfer directly from the transition metal to the ethylene. In these calculations, the charge on titanium in an eight C2H4 system is transferred and a polymer chain is produced. This reaction takes place only when ethylenes are arranged in a particular direction with respect to the ring, but does not take place for ethylenes near Ti or Cl atoms. The same mechanism is shown for a metallocene ligand which is sterically hindered or where the Cp ring is replaced by fluorenyl. These results suggest an entirely new polymerization mechanism in the absence of a cocatalyst in which the Cp ring is the active site.

• Asian Journal of Innovation and Policy
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• 제8권2호
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• pp.302-324
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• 2019

Family business is the oldest and the most prevalent type of entity in the world. In India, 85% of the enterprises are owned and/or managed by families, contributing to two-third of GDP. Thus the survival of family firms, which also generates 79% of private sector employment, is of paramount importance. Effective succession planning and innovation to gain competitive edge are the two key ways to ensure family firm survival. In this paper, the interplay between family succession and innovation is qualitatively studied using case study approach. Successors and Predecessors are interviewed to gain insights in the areas of succession planning and innovation. It is observed that family succession has a positive relationship with innovation, i.e. the presence of founding family members in the ownership and/or management of the enterprise has a positive influence on innovation tendency of the family firms. The findings contribute to the family business literature on succession planning and innovation, and their inter-relationship.

• 한국정보시스템학회지:정보시스템연구
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• 제28권1호
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• pp.1-16
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• 2019

Purpose The purpose of this study is to analyze causal relationship between quantity and quality for deriving ranking model of Online reviews. Thus, we propose implications for deriving the ranking model for retrieving Online reviews more effectively. Design/methodology/approach We collected Online review from Tripadvisor web sites which might be a kind of world-famous tourism web sites. We transformed the natural text reviews to quantified data which consists of quantified positive opinions, quantified negative opinions, quantified modification opinions, reviews lengths and grade scores by using opinion mining technologies in R package. We executed corelation and regression analysis about the data. Findings According to the empirical analysis result, this study confirmed that the review length influenced positive opinion, negative opinion and modification opinion. We also confirmed that negative opinion and modification opinion influenced the grade score.

• 한국정보시스템학회지:정보시스템연구
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• 제27권4호
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• pp.129-147
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• 2018

Purpose The purpose of this study is to identify the effects of users' perceived value of food delivery Apps and information quality on acceptance and intention to reuse of food delivery Apps. Design/methodology/approach This study made a design of the research model by integrating the factors of perceived value and information quality with the acceptance and continued usage of delivery Apps on the basis of the TAM (Technology Acceptance Model). Findings The results of this study suggests that perceived emotional value and monetary value, accuracy and timeliness of information have significant positive effects on usefulness and easiness of food delivery Apps. Meanwhile, both usefulness and easiness of food delivery Apps have significant positive influences on users' continually use intention. Furthermore, implications in terms of the findings of this study are discussed.

• East Asian Economic Review
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• 제25권1호
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• pp.3-31
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• 2021

This paper estimates the effects of transport (road and rail) & energy and ICT infrastructure (telephone, mobile, and broadband) on GDP growths in neighboring countries as well as own countries. We confirm positive direct contributions of infrastructure, access to Internet, and human capital on economic growth. The spatial panel regression models indicate that there exist positive externalities of the broadband infrastructure and human capital, and these results are robust regardless of the choice of spatial weight matrices. Our findings on spillover effects of infrastructure suggest the key role of neighboring countries' infrastructure on own country's economic growth.

• 아태비즈니스연구
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• 제13권3호
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• pp.401-415
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• 2022

Purpose - The purpose of this study was to investigate the structural relationship between residents' positive and negative perceptions on tourism impact, attitudes and support for tourism development. It was also investigate the moderating effects of gender and residence status of local residents among the relationships. Design/methodology/approach - The survey conducted for residents of Chengdu, Sichuan Province, China. A total of 520 samples were employed for the final analysis, and the collected data were performed using SPSS and AMOS. Findings - It was found that the residents' positive and negative perceptions on tourism impact had significant effects on the attitudes and support for tourism development. In addition, the gender and residence status of local residents showed a partial moderating effect among the relationships. Research implications - The theoretical and practical implications are discussed.

• 아태비즈니스연구
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• 제13권1호
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• pp.1-17
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• 2022

Purpose - This study was aimed to investigate whether the outcomes of green innovation brought positive effects to Chinese firms' ESG performance. Design/methodology/approach - Green innovation patents and ESG performance data of Chinese listed firms were empirically analyzed using panel data fix-effect linear estimations. Findings - The study found that green innovation performance enhanced Chinese firms' ESG performance. Also, the results showed that corporate social responsibility decoupling weakened this relationship and state ownership positively moderated this relationship, whereas corporate philanthropic giving did not have significant impact. Research implications or Originality - The findings indicated that green innovation was beneficial to enhancing corporate sustainability performance. In addition, the study highlighted the role of CSR communications and state ownership in interacting the positive effect that green innovation performance brings to corporate ESG performance.

• 아태비즈니스연구
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• 제13권4호
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• pp.123-134
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• 2022

Purpose - The purpose of this study is to investigate the effects of entrepreneurial motivation, self-efficacy, and entrepreneurial orientation on the performance of Mongolian entrepreneurs. Design/methodology/approach This study collected data from a survey on 236 entrepreneurs in Mongolia and investigate research hypotheses by empirical analysis. Findings It was found that entrepreneurial motivation (independence, opportunity-driven, achievement motivation) had a positive effect on the startups' performances, and necessity-driven motivation did not have a significant effect on the startups' performances. Entrepreneurial self-efficacy and entrepreneurial orientation had a positive effect on performance of startups. There are differences by gender on the relationships between entrepreneurial motivations and startup performances. Research implications or Originality This paper investigates the effects of entrepreneurial motivation, self-efficacy, and entrepreneurial orientation on the performance of startups in Mongolian.

• 한국웰니스학회지
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• 제7권2호
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• pp.101-111
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• 2012

The benefits and risks of whole body vibration (WBV) based acceleration training on the human body have been documented for many years. WBV training has been shown to increase muscular strength, explosive power, bone strength, performance, mobility, cardiovascular function, circulation and anabolic hormone level and so on. The purpose of this review is correct understanding and application of WBV training. Without proper understanding, rather, to apply WBV to the human body can be fatal harm, and therefore know that what is vibration and has advantages and disadvantages. If there is anything positive side there is bound to the negative aspects. In this regard, WBV training can have a positive impact on the already confirmed by several studies and also, there have been scientifically proven. But still we are part of a scientific approach that is acceptable even to keep in mind that you will always coexist. Once again, the effect of WBV with a physical stimulus that risk and should be remembered. In addition, given the momentum and how to exercise and well-being well aware that vibration exercise as a way to think of how not to be familiar with.