• 한국멀티미디어학회논문지
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• 제10권1호
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• pp.83-93
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• 2007

널리 이용되고 있는 공정 큐잉 방식인 WFQ(Weighted Fair Queuing)는 특히 인터넷 전화와 같이 저속이지만 엄격한 지연한계를 요구하는 서비스에 대해 대역폭 이용도가 저하되는 문제점을 갖고 있다. 이러한 WFQ의 문제점은 흐름의 레이턴시가 최적화되지 못하기 때문에 발생하는 것으로 최근에 밝혀졌고, 이어서 최적레이턴시 기반 공정 큐잉 방식인 LOFQ(Latency-Optimized Fair Queuing)가 도입되었다. 본 연구에서는 LOFQ에 점유자원 최적화 기능을 추가하여 성능특성을 더욱 개선하고, 반복적으로 수행되던 LOFQ의 자원변환 알고리즘을 개선하여 수행 복잡성을 줄인다. 아울러 WFQ에 비해 대역폭 이용도가 우수함을 증명한다. 시뮬레이션을 통해 성능개선 효과를 확인한 결과 $20{\sim}30%$의 개선이 있었다.

• 한국실내디자인학회논문집
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• 제15권5호
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• pp.255-264
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• 2006

This study started from the premise that the satisfaction of visitors in large-scaled design-related fair has co-relation with the environmental and contextual factors such as contents, lighting, the number and location of rest area, crowdedness, ventilation and circulation. The research was made in Seoul Living Design Fair 2005. 102 samples from 132 who answered to the questionnaire with likert-scaled and open questions were selected for the data, which were statistically analyzed through SPSS 12.0 program to explore the co-relation between the environmental factors and the satisfaction level of visitors. The findings showed that overall satisfaction level was in the middle of the scale, which means satisfied nor unsatisfied. The visitors showed relatively high satisfaction in the two factors-the contents of the fair and lighting system compared to the other factors such as the number and location of rest area, sign system, ventilation crowdedness and circulation. Even though the visitors had difficulties in circulation and showed various types in circulation, it did not seem to have a significant influence on the overall satisfaction level because it might be offset by the contents of the fair. Also, the visitors showed similar satisfaction level regardless of the type of circulation. It can be concluded that the main factors mentioned above should be considered to achieve higher satisfaction level and provide better environment in the large-scaled fair.

• 정보처리학회논문지C
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• 제14C권2호
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• pp.155-162
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• 2007

널리 이용되고 있는 공정 큐잉 방식인 WFQ(Weighted Fair Queoing)는 특히 인터넷 전화와 같이 저속이지만 엄격한 지연한계를 요구하는 서비스에 대해 대역폭 이용도가 저하되는 고질적인 문제점을 갖고 있었다. 이러한 WFQ의 문제점은 흐름의 레이턴시가 최적화 되지 않았기 때문으로 최근에 밝혀졌고, 이어서 최적 레이턴시 기반 공정 큐잉 방식인 LOFQ(Latency-Optimized Fair Queuing)가 도입되었다. 그리고 LOFQ에 점유자원 최적화 기능을 추가하여 대역폭 이용도를 개선하고, 반복적으로 수행되던 자원변환 알고리즘을 개선하여 수행 복잡성을 줄이는 등 LOFQ의 성능특성이 향상되었다. 하지만 여전 시뮬레이션에 의해 성능을 평가하고 있어 평가의 정확성과 소요시간 측면에서 어려움이 있다. 따라서 본 연구에서는 LOFQ의 대역폭 이용도를 수학적으로 계산하는 방법을 연구하고자 한다.

• 무역상무연구
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• 제49권
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• pp.213-236
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• 2011

Korea Shipping Act admits shipping conferences' joint actions like rate agreement, sailing agreement in some degree for development of shipping transport industries for decades. Meanwhile, EU has prohibited all kinds of shipping conferences' joint actions since October 2008, and many advanced countries also have similar position on shipping conference. The balance development between shippers and ship owners is very important in terms of national economic growth. So it is appropriate time to revise related laws such as Shipping Act and Monopoly Regulation and Fair Trade Act. First, It is direction for revision of Korean Shipping Act. The act has to define precisely the criteria of "unfairness" in case of admitting of shipping conferences' joint actions. Shipping conferences have a conference with shipper or shipper's delegation substantially on freight and transport conditions and so on. Second, It is direction for revision of Monopoly Regulation and Fair Trade Act. The fair trade commission has to perform fair roles between shippers and ship owners. The judgement of fairness has to confirm according to the spirit of not Korea Shipping Act but Korea Monopoly Regulation and Fair Trade Act itself.

• 한국식생활문화학회지
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• 제32권5호
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• pp.403-411
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• 2017

When purchasing products or services, consumers tend to purchase multiple value attributes through the acquisition of a product rather than physical characteristics. This study empirically analyzed the relations between consumption value, brand attitude, and purchase intention of customers purchasing fair-trade coffee, by dividing consumption values that would have significant effects on consumers' actual purchase behavior into five levels. Among the consumption value factors of customers purchasing fair-trade coffee, the functional value, social value, emotional value, and rare value all had significant effects on brand attitude and purchase intention while the influence of situational value on brand attitude and purchase intention was not verified. These finding are partially concordant with those of preceding studies, and the consumption value of consumers purchasing fair-trade coffee has positive effects on purchase behavior; therefore, it would be necessary for companies selling fair-trade products to understand consumers' specific values. Moreover, analysis of the influence of brand attitude on purchase intention of customers purchasing fair-trade coffee revealed that purchase intention increased when brand attitude was higher. These finding indicate that it is necessary to identify measures to increase purchase intention by targeting consumer groups with high brand attitude with intensive promotions.

• 동아시아식생활학회지
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• 제27권3호
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• pp.257-267
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• 2017

This study investigated the effects of values towards Korea fair trade coffee consumers upon attitudes and behavioral intentions and verified the moderating effects of ethical consumption consciousness between relationships among values, attitudes and behavioral intentions. A total of 283 data were analyzed for consumers of fair trade coffee residing in Seoul. Structural equation models were used to identify the relationship between the variables. As a result of the analysis, Schwartz (1994)'s 30 value items were factored into four areas: openness to change, self-enhancement, conservation, and self-transcendence. The value of 'self-transcendence' showed a significant positive impact on attitudes toward fair trade coffee, whereas 'openness to change' had a significant negative impact. Positive attitude toward fair trade coffee showed a significant impact on intentions to buy fair trade coffee. In addition, a moderating effect of ethical consumption consciousness between attitude and behavioral intention was found. Limitations and future research directions are also discussed.

• Journal of Information Processing Systems
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• 제17권2호
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• pp.306-317
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• 2021

The unbalance between system ergodic sum rate and high fairness is one of the key issues affecting the performance of non-orthogonal multiple access (NOMA) system. To solve the problem, this paper proposes a power allocation algorithm to realize the ergodic sum rate maximization of NOMA system. The scheme is mainly achieved by the construction algorithm of fair model based on α fair utility function and the optimal solution algorithm based on the interior point method of penalty function. Aiming at the construction of fair model, the fair target is added to the traditional power allocation model to set the reasonable target function. Simultaneously, the problem of ergodic sum rate and fairness in power allocation is weighed by adjusting the value of α. Aiming at the optimal solution algorithm, the interior point method of penalty function is used to transform the fair objective function with unequal constraints into the unconstrained problem in the feasible domain. Then the optimal solution of the original constrained optimization problem is gradually approximated within the feasible domain. The simulation results show that, compared with NOMA and time division multiple address (TDMA) schemes, the proposed method has larger ergodic sum rate and lower Fairness Index (FI) values.

• Safety and Health at Work
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• 제13권4호
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• pp.475-481
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• 2022

Background: This study investigated the association between fair and supportive leadership and symptoms of burnout and insomnia in police employees. Burnout and insomnia can have negative consequences for health, performance, and safety among employees in the police profession, and risk and protective factors should be thoroughly investigated. Methods: Data were collected in a police district in Norway through questionnaires administered in October 2018 and May 2019. The sample consisted of 206 police employees (52% males), with an average age of 42 years and 16 years of experience in the police occupation. Results: The results showed that a high degree of fair and supportive leadership was associated with lower levels of burnout and insomnia six months later. Fair and supportive leadership explained a greater amount of variance in burnout compared to insomnia. This finding indicates that fair and supportive leadership is a more important buffer factor against burnout than it is against insomnia. Stress was positively associated with burnout and insomnia, whereas quantitative job demands had no significant association with the concepts. Conclusion: Fair and supportive leadership can help protect employees from adverse consequences of stress and contribute to improved occupational health, whereas a low degree of support and fair treatment from leaders can both represent a stressor by itself and contribute to poorer coping of stressful events at work. The important role of leadership should be incorporated in measures aimed at preventing and reducing burnout and sleep problems.

• 무역학회지
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• 제41권5호
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• pp.1-14
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• 2016

최근 소비자들은 제품을 구매할 때 제품의 본질적인 특성 뿐 아니라 기업의 투명성과 윤리성 특히 공정무역제품에 대한 관심이 높아지고 있다. 일반적으로 공정무역을 하는 기업의 제품이나 서비스에 대해 소비자들은 긍정적인 태도를 가지게 되어 제품을 구매하게 되는 윤리적인 마케팅으로 간주 되지만 이를 실증한 연구는 거의 없다. 본 연구는 공정무역과 관련된 소비자의 구매의도를 파악하여 실제로 공정무역의 행위가 기업의 경쟁우위가 될 수 있는지 수단적 이해관계자 이론과 신호이론에 근거하여 실증분석 하였다. 첫 번째 실험은 순수 실험 디자인 중 피실험자 내 디자인을 통해 소비자 구매의도의 공정무역 마케팅 효과를 조사하였다. 두 번째 실험은 소비자 구매의도의 공정무역인증의 효과를 테스트하기 위해 시행되었다. 연구결과 소비자들은 일반적인 제품보다 공정무역제품을 선호한다는 결과를 도출하였으며, 공정무역인증 제품인 경우 그렇지 않은 제품보다 프리미엄 가격을 지불하고서라도 소비하려는 성향을 파악하였다. 또한 공정무역인증 라벨을 부착한 제품이 판매되는 장소에 따라 다른 결과를 도출하였는데, 이는 향후 기업이 목표로 하는 소비자에 따라 차별화된 제품을 유통해야한다는 시사점을 제시할 수 있을 것으로 보인다. 본 연구 결과는 기업이 목표로 하는 기대성과를 위하여 보다 차별화되고 중점적으로 활동할 수 있는 기업의 사회적 책임활동 방향을 제시할 수 있을 것으로 보인다.

• 월간경쟁저널
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• 64호
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• pp.64-72
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• 2000