• 농촌지도와개발
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• 제12권2호
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• pp.151-161
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• 2005

The objectives of this study were: a) to classify rural women's roles according to apicultural activity, and b) to find out the needs for education system related to women's roles in agricultural technology and the participation in decision making of farming activities, and c) to put forward the programs in agricultural educational system for supporting rural women according to their role types. This study was based on a literature review, empirical analysis including women in rural Korea. Based on the empirical findings, the following suggestions could be of offered for helping the rural women according to the types of their roles. 1) Family cultural reform, farming helper system, relief of housework allotment, supporting educational expenses, equal opportunity and easier places for participations should be strengthened in education programs of women farmers in Korea. 2) Government should provide diverse incentive programs, appropriate information and educational supports for women farmers' agricultural education including equipment and facilities for easy farm management. 3) Automation and mechanization of farm works, computer education, eco-friendly agricultural production skills, family consciousness and group action, importance and the future prospects of agriculture and farming, leadership role should be strengthened in agricultural education programs for rural women.

• 한국전자파학회지:전자파기술
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• 제17권3호
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• pp.63-73
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• 2006

경매는 자원을 가장 필요로 하는 이용자에게 합리적으로 배분하도록 고안된 제도이며, 여러 국가에서는 최근 주파수 자원의 배분에 도입하고 있다. 본 고에서는 주파수 경매가 가장 활발한 미국의 경우에 대해 설명한다. 미국의 경우, 여러 주파수 면허를 동시에 다중 라운드로 경매함으로써 경쟁자가 이전 라운드에 입찰한 가격에 대한 정보를 얻을 수 있게 하는 제도인 '동시 다중 라운드 경매'를 특징으로 한다. 이 제도하의 입찰 참여자는 이전 라운드의 정보를 기초로 유연하게 전략수정이 가능하며, 여러 주파수 면허들 간에 치적의 시너지 가치를 입찰자 각자가 결정할 수 있다. 이러한 제도적 특징으로 입찰이 활성화될 수 있었고 담합은 최소한으로 억제될 수 있었다. 이러한 동시 다중 라운드 방식은 미국의 성공을 기반으로 유럽의 3G 주파수 경매에서도 보편적으로 사용되어 가장 일반화된 주파수 경매 방식으로 받아들여지고 있다.

• 디지털콘텐츠학회 논문지
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• 제13권4호
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• pp.575-582
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• 2012

페이스북과 같은 모바일 SNS는 모든 사용자들이 시간과 장소에 구애받지 않고 타인과 협력하고 정보를 공유하기 위한 앱으로 유명하다. 그러나 일반인외에도 앱을 사용하는데 어려움을 가지고 있는 장애인과 고령자가 사용하기에 적절한 인터페이스를 제공하고 있는지에 대한 실태를 확인하기 위해 모바일 앱 접근성을 평가할 필요가 있다. 모바일 앱 접근성은 인지적, 신체적 특징에 상관없이 모든 사람에게 동등하게 모바일 애플리케이션에 대한 기회를 제공하고 있는가를 나타내는 지표이다. 이에 본 논문에서는 행정안전부에서 고시한 '모바일 애플리케이션 접근성 지침'과 한국정보화진흥원의 '모바일 애플리케이션(안드로이드) 접근성 점검 매뉴얼 (v1.0)'을 기반으로 페이스북과 카카오톡인 모바일 SNS의 모바일 앱 접근성을 평가하여, 모바일 앱 접근성 준수 현황을 파악하고, 개선방향을 제안하고자 한다.

• 전자공학회논문지S
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• 제35S권8호
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• pp.21-31
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• 1998

본 논문에서는 복사 네트워크의 멀티캐스트 셀을 적절하게 분배할 수 있는 새로운 분배 알고리즘을 제안한다. 합산기, 분배기, 가상 주소 부호기, 방송 네트워크가 이원적으로 구성된 복사 네트워크는 제안된 분배 알고리즘에 의하여 낮은 번지와 높은 번지가 양분되어 동시에 동작하기 때문에 입력된 셀이 균등하게 처리되어 셀 지연율과 입력 공정성이 개선되고 복잡도가 감소된다. 또한 방송 네트워크로 이진 트리와 Banyan 네트워크로 구성된 확장 Banyan 네트워크를 사용하여 오버플로우 발생 확률을 1/2로 감소 시킨다. 분석 결과 제안된 알고리즘은 입력 버퍼에서 셀 지연율이 확연하게 감소됨을 알 수 있었다.

• Journal of Communications and Networks
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• 제5권3호
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• pp.249-257
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• 2003

Ring networks are very commonly exploited among local area and metropolitan area networks (LAN/MAN), whereas cells or small fixed-size packets are widely used in synchronized ring networks. In this paper, we present an analytical method for evaluating the delay-throughput performance of a MAC protocol with multiple self-tokens in a slotted ring network under uniform traffic. In our analysis, we introduce the stationary probability, which indicates the number of packets in a node. Also, it is assumed that each node has a sufficiently large amount of self-tokens, and a slotted ring has the symmetry. The analytical results with respect to delay-throughput performance have similar values to computer simulated ones. Furthermore, in order to achieve fair access under non-uniform traffic, we propose an adaptive MAC protocol, where the number of self-tokens in a node dynamically varies, based on the number of packets transmitted within a specified period. In the proposed protocol, when the number of packets transmitted by a node within a specified period is larger than a specified threshold, the node decreases the number of self-tokens in a per-node distributed method. That results in creating free slots in the ring, thus all nodes can obtain an equal opportunity to transmit into the ring. Performance results obtained by computer simulation show that our proposed protocol can maintain throughput fairness under non-uniform traffic.

• 수산해양교육연구
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• 제20권3호
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• pp.358-368
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• 2008

The purpose of this study is to gather background data of teacher's performance of the fisheries and shipping industries high schools. This data will provide direction for advancing teacher's performance of the fisheries and shipping business high school,s by investigating and analyzing variables related to teacher's performance. This study focused on the opinions of thirty teachers within the fisheries and shipping business high schools. The conclusions of the study were as follows: First, teachers continually seek goal achievement, rewarding jobs, and a feeling of self-worth. However, it was found that male teachers have stronger task performing ability and form stronger relationships with their partners than female teachers. Second, it was shown that teachers have a much higher percentage of ability to teach. Particularly, male teachers are generally higher than female teacher. Third, it was shown that teachers have a much higher percentage of ability to teach, but it is required that they both get equal participation opportunity as there is a little difference between male teachers and female teachers. Fourth, it was found teachers exhibited a lower percentage rate of ability to manage activities, and required further development of programs for expansion of professionalism of this field.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권8호
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• pp.2875-2893
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• 2015

Existing coding aware routing algorithms focused on novel routing metric design that captures the characteristics of network coding. However, in packet coding algorithm, they use opportunistic coding scheme which didn't consider the queue state of the coding node and are equivalent to the conventional store-and-forward method in light traffic load condition because they never delay packets and there are no packets in the output queue of coding node, which results in no coding opportunity. In addition, most of the existing algorithms assume that all flows participating in the network have equal rate. This is unrealistic since multi-rate environments are often appeared. To overcome above problem and expand network coding to light traffic load scenarios, we present an enhanced coding-aware routing algorithm based on queue state and local topology (OQMCAR), which consider the queue state of coding node in packet coding algorithm where the control policy is of threshold-type. OQMCAR is a unified framework to merge single rate case and multiple rate case, including the light traffic load scenarios. Simulations results show that our scheme can achieve higher throughput and lower end-to-end delay than the current mechanisms using COPE-type opportunistic coding policy in different cases.

• Journal of Communications and Networks
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• 제13권6호
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• pp.639-654
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• 2011

In this paper, we present a channel access mechanism, referred to as the enhanced mesh coordinated channel access (eMCCA) mechanism, for IEEE 802.11s-based wireless mesh networks. The current draft of IEEE 802.11s includes an optional medium access control (MAC), denoted as MCCA, which is designed to provide collision-free and guaranteed channel access during reserved periods. However, the MCCA mechanism fails to achieve the desired goal in the presence of contending non-MCCA nodes; this is because non-MCCA nodes are not aware of MCCA reservations and have equal access opportunities during reserved periods. We first present a probabilistic analysis that reveals the extent to which the performance of MCCA may be affected by contending non-MCCA nodes. We then propose eMCCA, which allows MCCA-enabled nodes to enjoy collision-free and guaranteed channel access during reserved periods by means of prioritized and preemptive access mechanisms. Finally, we evaluate the performance of eMCCA through extensive simulations under different network scenarios. The simulation results indicate that eMCCA outperforms other mechanisms in terms of success rate, network throughput, end-to-end delay, packet-loss rate, and mesh coordinated channel access opportunity-utilization.

• 경영과정보연구
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• 제5권
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• pp.61-79
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• 2000

This research suggests the strategic adoption methodology of Customer Relationship Management. The backgrounds of CRM is the business environment changing that Market power is shifting to the customer who has unprecedented powers of choice today. The strategic adoption of Customer Relationship Management determines the value, needs and preferences of each customer or customer segment. Customer Relationship Strategy is an explicitly defined plan for how a company has decided to connect with, relate to, and focus on its chosen customers to create value. Deliberate decisions must be made, often involving trade-offs, so that investments are aligned with customer needs and value. Plan defined in terms of target customers value proposition, role in value delivery, and risk/reward sharing. All customers are not created equal; specific customers and/or customers segments are more desirable/valuable to pursue. Key premise of CRM is that value can be created by changing company's business model to better connect with customers. Area of service of Customer Relationship Management are as follows. Portfolio strategy, Market Opportunity Assessment, Brand Equity, Market Positioning, Pricing, Channel Strategy, Market Segmentation. Target Market Identification, Customer LifeTime Value Analysis, Customer Profitability, Customer Connections Economics Analysis. The objects of CRM are maximizing customer service effectiveness, improving customer loyalty, increasing customer service efficiency, optimizing intelligence about customer behaviors and preferences.

• 정보교육학회논문지
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• 제14권3호
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• pp.365-373
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• 2010

정보사회에서 공교육 기관인 학교는 사회의 공기(公器)로서 개인의 능력 육성 및 인류 사회가 축적해온 귀중한 지적 성취를 대물림해 주는 전수자로서, 또한 교육 기회의 평등을 유지하는 균형자로서 그 존재 가치를 선취해야 한다. 그럼에도 공교육 기관의 교수학습 질의 수월성에 대한 사회계층의 기대와 우려가 팽배해 있는 것이 현실이다. 이 연구는 초 중등학교별 교사들의 교수방법 및 교수자료 등 우수한 교육정보의 공유 및 유통 활성화 전략을 도출하기 위해 수행되었다. 이를 위해 교육정보 서비스의 공유 및 유통과 관련된 최근 기술 동향을 분석하고, 정보화 선도 교사들을 대상으로 집단토론을 실시하였다. 이러한 연구내용을 바탕으로 참여, 공유, 개방이라는 Web 2.0의 패러다임을 적용한 교육정보 공유 유통체제의 구축 및 활성화 방안을 제안하였다.