• Applied Science and Convergence Technology
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• 제27권5호
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• pp.86-89
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• 2018

Observations of neutrino oscillations are very strong evidence for the existence of neutrino masses and mixing. From recent experimental results on neutrino oscillation, we find that neutrino mixing angles are quite consistent with the so-called tri-bi-maximal mixing pattern, but the deviation from observational results is non-negligible. However, the tri-bi-maximal mixing pattern is still useful as a leading order approximation and provides a good guideline to search for the flavor symmetry in the neutrino sector. We introduce the $S_4$ permutation symmetry as a flavor symmetry to the standard model of particle physics with additional particle contents of heavy right-handed neutrinos and scalar fields. Finally, we obtain the tri-bi-maximal mixing pattern as a mixing matrix in the lepton sector within the suggested model. To derive the required unitary mixing matrix for the neutrino sector, the double seesaw mechanism is utilized.

• 한국정보과학회논문지:정보통신
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• 제37권4호
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• pp.294-300
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• 2010

본 논문에서는 IEEE 802.16j를 기반으로 하는 중계기를 도입한 와이브로 시스템에서 지향성 안테나를 사용한 3섹터 셀룰러 시스템에서 효율적인 기지국 커버리지 확장에 대해 분석하였다. 현재 진행 중인 IEEE 802.16j MMR 규격에서는 기지국과 멀티홉 중계기에 전방향성 안테나와 지향성 안테나의 사용을 고려하고 있다. 전방향성 안테나는 전방향($360^{\circ}$)으로 서비스 제공이 가능하지만 이웃한 기지국과의 신호간섭 때문에 효율이 떨어진다. 그러나 지향성 안테나의 경우는 빔이 방향성을 갖도록 안테나를 배치하여 이웃한 기지국과의 신호간섭을 줄일 수 있어 전방향성 방식보다 효율성이 높다. 그러나 IEEE 802.16j MMR환경에서는 기지국과 멀티홉 중계기가 지향성 안테나를 사용할 경우 채널 재사용 등에 의해 다른 셀에서 쓰이는 동일 채널의 간섭(Co-channel interference) 때문에 지향성 안테나가 갖는 효율성이 달라질 수 있다. 따라서, 본 연구에서는 지향성 NBTC, WBTC 방식의 기지국에 지향성 안테나를 갖는 중계기를 multi-tier로 배치하는 구조를 제안하고, 기지국과 중계기들의 빔의 방향에 따른 동일 채널 간섭을 분석하였다. 또한, 제안하는 멀티홉 중계기가 배치된 NBTC안테나와 WBTC 안테나 방식을 전방향성 안테나를 갖는 중계기가 배치된 방식과 비교 분석하여 멀티홉 중계기의 홉 수가 증가함에 따른 성능 저하 및 셀 커버리지 확장과의 상관관계를 알아보았다.

• 유통과학연구
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• 제20권9호
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• pp.1-10
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• 2022

Purpose: Public sector is usually not an attractive career choice for the youths, due to the uncompetitive income and the working environment. Therefore, understanding the motivations of the Generation Z, the currently early-career employees, to work in the public sector is important. This research aims to address a gap in the literature on the linkage between Personality Traits of Generation Z and Public Service Motivation (PSM). Research Design, Data, and Methodology: Using the sample of Vietnamese generation Z, it shows how individual personality, as defined by the Big Five, affects PSM. A quantitative survey of 355 university students, who are members of this generation and are preparing to join the labor market, was undertaken. We used SEM to examine the results. Results: Our findings show that Agreeableness, Neuroticism, and Conscientiousness are significant antecedents of PSM. Agreeableness, which leads to three PSM dimensions, namely Compassion, Self-Sacrifice, and Commitment to Public Values, is the best predictor of this motivation. Meanwhile, Neuroticism and Conscientiousness only affect the dimension of Compassion. Conclusion: This study adds to the limited current knowledge on the personality-PSM relationship among generation Z. The distribution of affective (Compassion, Self-Sacrifice) and norm-based (Commitment to Public Values) motives provide insight for both career counselors and recruiters in public service delivery.

• The Journal of Asian Finance, Economics and Business
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• 제8권12호
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• pp.455-463
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• 2021

The creative industry has an important role in economic development, but creative economy entrepreneurs still face many problems in business development and sustaining their businesses. The purpose of the study is to investigate the effect of entrepreneurship orientation, innovative product advantages, and social network quality on business performance to help companies stay competitive. The research uses a quantitative approach with the population being the owner of the creative industry in Semarang City, Central Java, Indonesia. The sampling technique used is convenience sampling, obtained as many as 126 creative industry owners. Data was analyzed using Structural Equation Modeling Partial Least Square (SEM-PLS). The findings of this study show that entrepreneurial orientation, innovative product advantage, and social network quality have a positive effect on the business performance of the creative industry in Semarang City, Central Java, Indonesia. According to the study, a company with superior resources can win the competition and achieve business sustainability. When compared to competing organizations, the benefits of resources and competitive ability will create a competitive edge. As a result, stakeholders such as the government, the corporate sector, and universities are expected to play a larger role in accelerating the growth and development of creative industries.

• The Journal of Asian Finance, Economics and Business
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• 제8권5호
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• pp.923-930
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• 2021

The COVID-19 pandemic weakened the small- and medium-sized enterprise (SME) sector. The decline in turnover is one that is felt by the batik industry in East Java, and the decline in turnover in the batik industry is very drastic. This research was conducted to prove the influence of the COVID-19 pandemic on SMEs in the batik industry. One model is proposed to prove the existence of an increase in the performance of the batik industry's SMEs by implementing a customer relationship management strategy, business strategy, and market orientation. The study population was the batik industry entrepreneurs in East Java, Indonesia, using SEM analysis based on Amos, purposive sampling method, and a sample of 180 respondents. The results showed that the model was accepted. The results also show that customer relationship management and business strategy contributed to the performance of SMEs, while market orientation did not contribute to the performance of SMEs during the COVID-19 pandemic. To be able to maintain the sustainability of the company, the steps taken by the company are to lay off some of the employees, and during the production period the production stops, and focus on selling goods that have been previously produced.

• The Journal of Asian Finance, Economics and Business
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• 제8권7호
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• pp.447-456
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• 2021

State-Owned Enterprises (SOEs) are business entities that are owned mainly by the state. Good financial governance (GFG) is as important for SOEs as for the private sector companies. Prudence and GFG can affect the value of the company. This research aims to test the impact of macroeconomics, investment decisions, and financing decisions on prudence, Corporate Social Responsibility Disclosure (CSRD), dividend policy, and company value of SOEs registered on the IDX from 2014-2019. GFG and financing decisions are moderating variables. The population in this study is 16 SOEs listed on the Indonesia Stock Exchange from 2014-2019. The research method is quantitative and uses Partial Least Squares (PLS), which is an approach to Structural Equation Models (SEM) that allows researchers to analyze the relationships simultaneously. The results showed that macroeconomic factors, investment decisions, financing decisions, and prudence directly affect the company's value. However, CSRD and dividend policy directly do not affect the company's value. Prudence can mediate the influence of financing decisions on company value. GFG moderates the relationship between prudence and company value. Thus, GFG is key to producing compliant regulatory reports and disclosures. GFG aims at facilitating effective monitoring and efficient control of the business. Its essence lies in fairness and transparency in operations and enhanced disclosures for protecting the interest of different stakeholders.

• 신재생에너지
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• 제18권2호
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• pp.26-39
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• 2022

Considering the recent substantial increase in national research and development (R&D) budgets in the energy sector there has been increased Interest in the effectiveness of government R&D investments. We conducted a case study to calculate the allowable scale and effectiveness of R&D investment by calculating the direct performance improvement effect resulting from R&D investment as an economic value. Using conditions that existed prior to R&D investments as a reference, five cases in which performance improved due to R&D investments were compared and analyzed. The government's financial investment is increasing rapidly in line with the establishment of the national hydrogen roadmap. R&D is needed to enhance the current low technology readiness level of hydrogen fuel cells compared to solar and wind energy fields. Therefore, an R&D project to improve the performance of the fuel cell system was selected as this case study's subject. Using the results in this study, the allowable level of investment in the task unit of national R&D projects could be calculated. Moreover, it is advisable to provide a standard for rational decision making for new R&D investments since it is possible to determine investment priorities among a large number of candidates.

• 자원환경지질
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• 제54권6호
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• pp.649-657
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• 2021

This paper aims to study the impact of natural disasters on per capita income in Vietnam both the short and long-term, specifically impact loss of income caused by the extreme drought 2013 for agriculture, forestry and fishery in Phu Yen Province, Central Vietnam. The study valued economic damage by applying the synthetic control method (SCM), which is a statistical method to evaluate the effect of an intervention (e.g. natural disasters) in different case studies. It estimates what would have happened to the treatment group if it had not received the treatment by constructing a weighted combination of control units (e.g. control provinces). The results showed that the 2013 drought caused a decrease in income per capita, mainly in the agriculture, forestry, and fishery sector in Phu Yen. The reduced income was estimated to be VND 160,000 (1 USD = 23,500 VND (2021)) for one person per month, accounting for 11% of total income per capita and continued to affect the income 6 years later. Therefore, authorities need to invest in preventive solutions such as early and accurate warnings to help people to be more proactive in disaster prevention.

• 유통과학연구
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• 제20권11호
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• pp.89-98
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• 2022

Purpose: Increasing competition in the higher education sector has prompted universities to enhance their marketing efforts and understand their potential customers. The study aims to explore how information sources are used and changed among prospective Vietnamese students during the decision-making process. Research Design, Data, and Methodology: This study undertakes a longitudinal study involving multiple rounds of data collection to better understand the decision-making process of prospective students. Data was collected from 12th -grade students in Vietnam through two rounds of quantitative surveys with 251 students and one round of qualitative interviews, spanning the duration of their senior year. The three stages of the decision-making process correspond to the three stages of pre-purchase period. Results: Most students decide that attending open days, taking career assessments, and looking up information online are the most important information sources to consider. The WOM sources are more important in the early stages, while university-generated sources and events are important in the later stages. Conclusion: Implications from this study may contribute to the design of more effective marketing communications campaigns as university marketers gain a better understanding of the distribution of information sources utilized for each specific stage of the decision-making process.