• Journal of the Institute of Electronics Engineers of Korea TC
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• v.44 no.8
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• pp.51-61
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• 2007

For provisioning reliable data transmission, the 3GPP RLC specification adopted a selective-repeat ARQ scheme assisted by a window-based admission control scheme. In the 3GPP ARQ, which is a member of the selective-repeat ARQ clan, inheres the reordering problem A long and irregular reordering time results in the degradation of throughput and delay performance, and may incur the overflow of the reordering buffer. Furthermore, the reordering time must be regulated to meet the requirements of some services which are loss-sensitive and delay-sensitive as well. Perceiving the reordering hazard, we propose an alternative, identified as snowball scheme, to the original admission control scheme of the 3GPP ARQ with aiming at deflating the occupancy of the reordering buffer. A unique feature of the snowball scheme is to reject a new DATA PDU if it is non-adjacent to any DATA PDU sojourning at the reordering buffer. Such an intentional rejection apparently reduces the occupancy of the reordering buffer while it may deteriorate the throughput and delay performance. Developing an analytical approximation method, we investigate the effect of snowball scheme on the saturated occupancy and throughput. Also, we, using a simulation method, evaluate the peak occupancy, normalized throughput and average delay in the practical environment. From the simulation results, we reveal that the snowball scheme is able to enhance occupancy performance as well as throughput performance compared with the original admission control scheme of the 3GPP ARQ.

• International Journal of Advanced Culture Technology
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• v.9 no.1
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• pp.64-69
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• 2021

Brands have begun to act without giving in to the challenges facing our society. Just like the slogan in the novel "The Three Musketeers" by Alexandre Dumas proclaimed, "All for one, one for all!" in the age of transmedia the success of brand activism must reflect the same principle. Specifically, by embracing the big as well as the little stories of consumers scattered everywhere, each and every one should create a huge resonance. This means that brands should use the cultural lever of transmedia so that the various stories of consumers do not fade into oblivion and, furthermore, expand the brand's call to action. By analyzing brand activism cases in business, this study explores the effectiveness of brand activism for advertisers to develop a better understanding of brand communication strategy. Building on findings that show new young generation consumers to favor brands that respond to social, political, and environmental issues and conceptual implications of the snowball effect, this study emphasizes consumer participation in the brand story creation process and the need for brands to aim for high standards of professionalism and accountability, so that they can grow together with their consumers.

• The Journal of the Korea Contents Association
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• v.15 no.4
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• pp.114-121
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• 2015

This study aims to reveal the educational effect and healing action of senior dance by approaching the experiential awareness of the social workers in phenomenological ways. The social workers who participated in the study are 7 social workers at Institute of Social Welfare of the Elderly Welfare in 2014 selected from ARTE Culture and Arts Culture and Arts Education Support Project as beneficiary organizations in the field of dance education. The materials and data of this study have been collected through 1 to 1 in-dept interviews with them. As a result, social welfare workers were recognizing senior dance education as emotional, recognizable, mental, social art activities rather than simple physical activities. And the senior citizens stimulate individual positive emotions and cognitive and have given feedback on and on. So, snowball effect that satisfactory feel of our lives get increased occurs. Finally, senior dance education provided at welfare institutions can be considered healing art activity to improve quality of life gradually through continuous interaction among individuals and communities.

• Journal of Families and Better Life
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• v.28 no.3
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• pp.1-12
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• 2010

This study identifies how marital interaction influences the marital instability of foreign wives. Data for the study were based on a snowball sampling of 101 foreign wives married to Korean husbands in Gyeongnam, Korea. The respondents reported higher levels of perceived spousal support, marital satisfaction, and sexual satisfaction, but reported lower levels of spousal hostility. A hierarchical regression analysis was conducted to identify the variables that affect marital instability. Independent variables included in the study were years married, religion, monthly income, educational level, perceived husband support, sexual satisfaction, marital satisfaction, and perceived husband hostility. While religion, educational level, sexual satisfaction, marital satisfaction, and perceived husband hostility had a strong effects on the marital instability of foreign wives, years of marriage, monthly income, and perceived husband support did not show significant effect on marital instability. Marital satisfaction had the strongest effect on marital instability.

• Korean Journal of Child Studies
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• v.37 no.2
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• pp.43-56
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• 2016

Objective: This study examined the effect of early childhood teachers' perceptions of teacher efficacy and professionalism, which are personal traits, when administering the National Childcare Curriculum. Methods: Using snowball sampling, data were collected from 266 childcare center teachers in the nation and were analyzed using one-way analyses of variance and multiple regression using SPSS 14.0. Results and Conclusion: The findings are as the following: First, teacher efficacy was not significantly different among teachers by age, teaching experience, education, and childcare center type. Second, teacher efficacy was significantly related to the perception of their professionalism. Lastly, teachers' perceptions of teacher efficacy and professionalism explained significantly the variance in teachers' performance when administering the National Childcare Curriculum.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.12
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• pp.159-168
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• 2020

The cryptocurrency market has received immense consideration in media and academia since the beginning of 2013 because of its huge price fluctuation. This study focuses on Arab investors who invest in the cryptocurrency market by investigating the influence of behavioral finance factors on investment decisions in the cryptocurrency market. A quantitative approach was used by employing a snowball sampling method through 112 questionnaires. The results show that herding theory, prospect theory, and heuristic theory have a significant effect on investors' investment decisions in the cryptocurrency market. This emphasizes the significant role of the proposed behavioral factors as determinants of the investors' investment decisions. This study contributes to the existing research by consolidating the results of different researches in this study. It also contributes to the investors' understanding of the dynamics of the cryptocurrency market and it enhances the ability to make informed decisions based on their understanding. The implication of the findings will prepare hit and run investors to be progressively prepared to stay in the cryptocurrency market and develop their abilities on the most proficient method to settle on sound venture choices. Furthermore, the findings of this study will encourage financial specialists to realize that information on the traditional finance theory is not adequate to excel in the cryptocurrency market.

• Korean Journal of Health Education and Promotion
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• v.29 no.1
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• pp.39-57
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• 2012

Objectives: This study was to measure community capacity using individual-level and organizational-level capacity indicators and illuminated the relationship of community capacity and self-rated health status in two regions in Seoul, Korea. Methods: The data from individual surveys were obtained by quota sampling the residents of two autonomous gu in Seoul (N=1,000). The data from organizational surveys were obtained by snowball sampling lists of organizations in the possession of gu offices with a sampling frame (N=153). The survey tools were 6 indicators regarding residents' social capital and a sense of community and 5 indicators regarding community-based organizations and their networks. The analysis methods consisted of the effect of the components of capacity on health status and social network analysis. Results: As for capacity on individual levels, while D-gu was mainly developed inn individual capacity in terms of social interaction, Y-gu was stronger in a sense of community and cohesion among residents. As for capacity on organizational levels, Y-gu was more developed than was D-gu in associational networks. Conclusion: It is necessary to develop health promotion program per community and to strengthen partnerships with and among grassroots organizations based in local communities through the measurement of community capacity.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.10
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• pp.885-896
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• 2020

The purpose of this study is to shed light on the driving motivations of contributing social word of mouth on social networking sites (sWOM) toward both tangible and intangible products. In order to develop a research model, this study adopts the motivation theory and TAM model. Data was collected from 904 members of the cosmetic and restaurant communities by using the snowball method. After assessing the validity of all constructs, the structural equation modeling (SEM) is used to test the proposed hypotheses. Results show that personal motivations (satisfaction, opinion leadership, self-enhancement, and economic incentives) and characteristics of sWOM (Perceived Usefulness and Ease of Use) have positive effect on exposure and engagement behaviors. Here are our specific findings, (1) customer satisfaction positively affects online interactions on SNSs such as Like or Sharing a content; (2) sWOM contribution behavior exists in two structures (Exposure and Engagement) and affects each other; (3) This study combines two groups of personal motivation and TAM to conceptualize a research model; and (4) The motivations of contributing sWOM between a specified service and product are rather similar. These findings help digital managers to understand consumers' behavioral contributions on SNSs and also provide interesting insights for marketers.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.3
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• pp.1231-1240
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• 2021

A shift in perspective from standard finance to behavioral finance has taken place in the past two decades that explains how cognition and emotions are associated with financial decision making. This study aims to investigate the influence of various psychological factors on investment decision-making. The psychological factors that are investigated are differentiated into two aspects, cognitive and emotional aspects. From the cognitive aspect, we examine the influence of anchoring, representativeness, loss aversion, overconfidence, and optimism biases on investor decisions. Meanwhile, from the emotional aspect, the influence of herding behavior on investment decisions is analyzed. A quantitative approach is used based on a survey method and a snowball sampling that result in 165 questionnaires from individual investors in Yogyakarta. Further, we use the One-Sample t-test in testing all hypotheses. The research findings show that all of the variables, anchoring bias, representativeness bias, loss aversion bias, overconfidence bias, optimism bias, and herding behavior have a significant effect on investment decisions. This result emphasizes the influence of behavioral factors on investor's decisions. It contributes to the existing literature in understanding the dynamics of investor's behaviors and enhance the ability of investors in making more informed decision by reducing all potential biases.

• The Journal of Asian Finance, Economics and Business
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• v.9 no.9
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• pp.115-120
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• 2022

This research aims to investigate the antecedents of career growth and its impact on employee performance. The research design is quantitative with a causal method. The sample used is 242 respondents working in different hospitals in Banten Province and were selected through the snowball sampling technique. The analytical method used to examine the research model is PLS-SEM. The analysis result shows that work environment and training have an impact on increasing career development and hospital employee performance. Career development can also directly be an antecedent in improving the performance of hospital employees, but only has a moderate effect in mediating the influence of work environment and training on the employees' performance in the hospital. Based on these findings, hospital management in Banten Province must create and maintain a comfortable working environment for employees, offer training specific to each employee's line of work to help them improve their abilities, and create a system for career planning that takes into account each employee's potential.