• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제11권1호
• /
• pp.374-395
• /
• 2017

Users quite often experience volatile channel conditions which negatively influence multimedia transmission. HTTP adaptive streaming has emerged as a new promising technology where the video quality can be adjusted to variable network conditions. Nevertheless, the new technology does not remain without drawbacks. As it has been observed, multiple video players sharing the same network link have often problems with achieving good efficiency and stability of play-out due to a mutual interference and competition among video players. Our investigation indicates that there may be another cause for under-performance of the streamed video. In an emulated environment, we implemented three algorithms of adaptive video play-out based on bandwidth or buffer assessment. As we show, traffic generated by players employing the same or similar play-out strategies is positively correlated and synchronised (clustered), whereas traffic originated from different play-out strategies shows negative or no correlations. However, when some of the parameters of the play-out strategies are randomised, the correlation and synchronisation diminish what has a positive impact on the smoothness of the traffic and on the video quality perceived by end users. Our research shows that non-correlated traffic flows generated by play-out strategies improve efficiency and stability of streamed adaptive video.

• 가정과삶의질연구
• /
• 제22권6호
• /
• pp.165-175
• /
• 2004

The purpose of this study was to classify the household financial strategies and investigate major determinants of the household financial strategies and financial performance. The data of 3,994 households is from the Korean Labor and Income Panel Stud?. The major findings were as follows. (1) The classified household financial strategies types were Residual ($44.6\%$), Informal Institutional ($13.3\%$), Financial Assets ($16.7\%$), Real Estate ($13.4\%$), and Diversified Portfolio ($12.0\%$). (2) The criteria of classification of the household financial strategies were relative, not absolute. (3) The household financial strategy types changed largely during a short period(1999-2000). (4) In all households, the variables that affected changes in household financial strategies were education, occupation, number of children, residential location and home ownership. (5) Households that employed a diversified portfolio strategy had the greatest financial performance (2,316,000 won net gain). (6) In all households, the variables that had the greatest influence on financial performance were the number of children, assets and debts. 1'he financial performance was significantly different according to changes in the household financial strategy.

• 통상정보연구
• /
• 제15권2호
• /
• pp.49-69
• /
• 2013

아프리카는 석유가스를 비롯한 각종 광물자원의 보고로서 자원의 확보는 물론 향후 신흥시장 선점, 외교적 영향력 확대라는 측면에서 다방면에서의 진출이 필요하다. 아프리카의 전략적 가치를 고려할 때 아프리카 시장은 무한한 잠재력을 가진 지역이며, 자원이 빈곤한 우리나라로서는 적절한 시장진입 전략 선택과 성과에 대한 올바른 평가가 매우 중요하다. 이에 본 논문은 한국기업의 수출환경특성-아프리카 진출전략-기업성과 간의 인과관계분석을 통해 아프리카 진출 성과를 분석하고자 하였다. 분석 결과, 해외시장진입 전략 요인 중 해외시장진입시기, 기업의 경쟁전략, 마케팅 전략은 기업성과에 유의한 정(+)의 영향을 미치는 것으로 나타났다. 따라서 아프리카 시장에서 기업이 성과를 향상시키기 위해서는 아프리카 시장 특성에 맞는 집중화 및 세분화 전략, 마케팅 전략이 필요하다.

• 융합정보논문지
• /
• 제11권3호
• /
• pp.147-158
• /
• 2021

본 연구의 목적은 언어네트워크를 활용하여 교사의 언어적 상호작용과 문제해결전략의 구성을 살펴보고자 함이다. 본 연구에서는 유아환경교육 과정에서 발생한 교사의 발화를 수집하여, 범주를 개발하고 자료를 코딩하여 하위범주 간의 관계를 분석하였다. 분석결과는 다음과 같다. 첫째, 교사의 언어적 상호작용에서는 정보제공하기가 가장 중심에 위치하여 통합하기와 함께 높은 영향력을 보였다. 둘째, 교사의 문제해결전략에서는 제안이 가장 중심에 위치하여 확산적 사고와 높은 영향력을 보였다. 셋째, 교사의 언어적 상호작용과 문제해결력을 종합적으로 살펴보면, 제안이 가장 중심에 위치하고, 정보제공하기, 확산적 사고 등이 강한 연결성을 보였다. 이외에 제안과 의사결정이 문제관심을 매개로 평가와 연결성을 보였다. 본 연구의 결과를 통해 유아환경교육에 있어 교사가 유아의 문제해결과정을 지원하여 상호작용하기 위해서 유아의 반응에 맥락적으로 반응하고 이해할 수 있는 교사의 역량강화 교육이 필요함을 시사한다.

• 융합정보논문지
• /
• 제8권4호
• /
• pp.231-236
• /
• 2018

최근 교육상황에서 감성과 관련된 연구가 점차 증대되고 있다. 본 연구는 대학 수업에서 자기조절학습전략과 자기손상전략을 예측하는 변인을 규명하기 위해 선행연구 분석을 통해 성취감성을 선정하여 분석하였다. 연구대상은 수도권의 A대학과 B대학 134명이었으며 자료분석은 상관분석 및 다중회귀분석을 활용하였다. 연구결과, 자기손상전략을 부적으로 예측하는 변인은 성취감성의 수업관련 감성, 학습관련 감성, 시험감성이었다. 그러나 성취감성은 자기조절학습전략에 영향을 미치지 않았다. 이에 대학 수업에서 자기손상전략을 낮추기 위해서는 수업관련 감성, 학습관련 감성, 시험감성 수준을 높여야 할 것이다. 본 연구결과는 학습에서 감성에 대한 이론적 기초와 실제적 유용성을 제공할 것이다.

• 한국산학기술학회논문지
• /
• 제16권10호
• /
• pp.6940-6948
• /
• 2015

본 연구는 미디어리터러시와 자기표현 및 정서조절전략이 청소년의 자기조절학습능력에 미치는 영향을 분석하기 위해 D지역의 청소년 453명을 대상으로 실시하였다. 연구결과, 미디어리터러시, 자기표현, 정서조절전략은 청소년의 자기조절학습능력에 유의한 영향을 미치는 것으로 나타났다. 이를 통해 청소년의 자기조절학습능력에 미디어리터러시는 중요한 역할을 하며, 자기표현 및 정서조절전략은 미디어리터러시와 청소년의 자기조절학습능력 사이에서 매개효과가 있음을 알 수 있었다. 이러한 연구결과는 미디어리터러시 시대에 학교생활 및 교육현장의 교육과정을 통해 청소년의 자기조절학습능력과 자기표현 및 정서조절전략 향상을 위한 많은 노력과 교육 프로그램이 필요함과 우리 미래의 희망인 청소년의 삶에 필요한 자기표현, 정서조절전략, 자기조절학습능력의 향상과 학교교육의 질적 수준을 높일 수 있는 이론적이고 실증적인 기초자료를 제공하는 데 많은 시사점을 준다.

• 한국경영과학회:학술대회논문집
• /
• 대한산업공학회/한국경영과학회 2000년도 춘계공동학술대회 논문집
• /
• pp.239-242
• /
• 2000

Symbiotic evolutionary algorithms are stochastic search algorithms that imitate the biological coevolution process through symbiotic interactions. In the algorithms, the fitness evaluation of an individual requires first selecting symbiotic partners of the individual. The symbiotic partner effects the change of individual's fitness and search direction. In this study we are to analyze how much partnering strategies can influence the performance of the algorithms. For this goal extensive experiments are carried out to compare the performance of partnering strategies. The NKC model and the binary string covering problem are used as the test-bed problems. The experimental results indicate that there does not exist statistically significant difference in their performance.

• 통상정보연구
• /
• 제9권2호
• /
• pp.375-397
• /
• 2007

This paper aims to develop international marketing strategies for Korean traditional food and gives some implications to firms that are ready to invest in developed countries with Korean traditional food and to the government that needs to make a policy to support the food industry in international marketing. For this, we researched data and studied domestic and international cases. Also, we extracted two common factors(namely product factor and image factor) through fourteen variables by factor analysis and tested whether both factors significantly influence on the success of international marketing(favorable impression). As a results, we found several key success factors(KSF), including both factors mentioned above and developed international marketing strategies for Korean traditional food reflecting these key success factors.

• ETRI Journal
• /
• 제34권2호
• /
• pp.245-255
• /
• 2012

Among emerging devices propelling the growth of mobile devices, smartphones and tablet-PCs are among the most recognizable. In this study, a research model is designed for exploring acceptance-diffusion strategies for tablet-PCs from the viewpoint of consumer perception, which is verified through a survey. The results of this study show that tablet-PCs have great potential to be versatile, multifunctional devices, even though they are currently considered mostly as entertainment-oriented rather than fulfilling the essential needs of everyday life. An analysis of the acceptance model for tablet-PCs revealed that playability, cost level, functionality, and complexity significantly affect user acceptance. An analysis of the diffusion model, on the other hand, showed that playability and user interface have a significant influence on satisfaction, trust, and positive behavioral intention. We also found that cost level is not a major hindrance in the market diffusion of tablet-PCs. The results of this study can be used to establish effective acceptance and diffusion strategies for tablet-PCs and other emerging devices.

• 유통과학연구
• /
• 제12권8호
• /
• pp.43-54
• /
• 2014

Purpose - This study was based on a theoretical consideration of the structural relationship between the support and control of the franchisor and the satisfaction and strategic response (voice, loyalty, exit, neglect) of the franchisee. First, based on the preceding research, this study systematically organized the type of support and control of the franchisor. Second, the study examined the effects of a franchisor's support and control on the expectancy disconfirmation between affiliated franchisees' expectations before a franchise agreement and performance after operating an affiliated store. Third, the study looked into the effects of expectancy disconfirmation relating to a franchisor's support and control on an affiliated franchisees' general satisfaction. Fourth, this study examined the influence of the general satisfaction of a franchisee on affiliated franchisees' response strategies. Research design, data, and methodology - In this study, the population comprised the nation's franchisors, and the sample comprised franchisees conducting business in Seoul and Gyeonggi-do. A self-administered questionnaire was used; the author and examiner explained the study's parameters to the interviewees in advance, to lessen the rate of rejection of the answers and to maintain reliability. The author distributed 350 copies of the questionnaire and collected 327 copies (93.4%). The author removed 54 copies of the sample, as these copies belonged to franchisees that were not registered by the Fair Trade Commission and/or were thought to have either defects or inadequate answers. The author selected an effective sample of 273 copies to enter data and to do the statistical analysis. Results - Both a reliability analysis and a confirmatory factor analysis were performed to measure reliability and validity, and a structural equation model was used to conduct the hypothesis test and investigate the models. The hypothesis was tested (Table 5). The models had a suitable fit, for instance, χ² = 447.663(df = 212, p = .000), χ²/df = 2.112, GFI = .881, AGFI = .858, RMR = .083, RMSEA = .067, NFI = .932, and CFI = .961. The hypothesis test results were as follows. Hypothesis 1 was accepted (C.R. = -2.339, p = .019). Hypothesis 2 was accepted (C.R. = 15.213, p = .000). Hypothesis 3 was accepted (C.R. = -2.631, p = .006). Hypothesis 4 was accepted (C.R. = 16.271, p = .000). Hypothesis 5 was accepted (C.R. = 2.391, p = .017). Hypothesis 6 was accepted (C.R. = 5.777, p = .000). Hypothesis 7 was accepted (C.R. = 17.153, p = .000). Hypothesis 8 was accepted (C.R. = 24.746, p = .000). Hypothesis 9 was accepted (C.R. = -10.150, p = .000). Hypothesis 10 was accepted (C.R. = -12.124, p = .000). Conclusions - The research results showed that expectations for a franchisor's support and control had a significant influence on expectation disconfirmation in a negative way, whereas the performance of support and control were found to have a significant influence on expectation disconfirmation in a positive way. In addition, the expectation disconfirmation of support and control was found to have a significant influence on satisfaction of franchisees in a positive way. Generally, regarding the research on control, control is found to have a negative influence on the satisfaction of franchisees, but this study proves that control is found to affect it in a positive way through conformity.