• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.453-456
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• 2009

HiperLAN Type2에서의 MAC 프로토콜은 TDMA/TDD을 기반으로 하며, 무선채널은 중앙제어방식으로 운영되는 AP(Access Point)에 의해서 할당된다. 상향링크로 데이터 전송이 필요한 이동단말은 RCH 채널을 통하여 AP에게 무선자원을 요청한다. 각 MAC 프레임마다 RCH 수를 동적으로 변경하는 것이 중요한데, RCH 수가 많이 할당되면 무선자원의 낭비를 초래하며, RCH 수가 적게 할당되면 이동단말간의 충돌이 증가하고 AP에 접속하는 시간도 길어진다. 따라서 RCH 수는 트래픽에 따라 적절하게 할당되어야 한다. 본 논문에서는 HiperLAN/2에서의 성능향상을 위해 충돌과 성공을 고려하여 RCH(Random CHannel)수를 고정적인 ${\beta}$값만큼 증감하는 방법을 제안하였다. 제안한 방법의 효율성을 입증하기 위해 시뮬레이션을 수행하였으며, 처리율과 접속지연 관점에서 분석하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.810-813
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• 2008

As you suddenly enlarged importance recognition of human traces capital as the sources of company competitiveness in the digital times, you reached, and necessity of human traces resources management system to more efficiently manage human traces resources was increased that you were competitive. A developed a small and medium enterprises e-HRM prototype system to reflect decision making to be effective by a weight grant-based evaluation management of various viewpoints and AHP at these papers as you used BSC as you applied performance rating criteria.

• 한국IT서비스학회:학술대회논문집
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• 2008.11a
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• pp.220-223
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• 2008

조직에서 IT에 투자함으로써 납득할만한 가치를 얻고 있는가에 대한 물음에 많은 경영진과 의사결정권자들은 확신을 하지 못하고 있는 상황이다. 또한 조직의 IT 역량이 조직의 경쟁력 향상에 기여하고 있는가에 대한 부분도 크게 다르지 않다. IT프로젝트는 의뢰 IT부서가 담당하고 있으며, IT 투자 또한 전사 차원의 전략인 관점보다는 전술적 수준의 이니셔티브로 인해 적지 않은 자원을 낭비하고 있는 실정이다. 이러한 상황에서 IT 거버넌스에 대한 필요성과 개념에 대한 올바른 인식이 필요하게 되었으며, 그 접근 방법으로써 ITA를 비롯하여 많은 방법론들이 대두되고 있는 상황이다. 이에 우리는 정부부처 및 공공기관을 대상으로 ITA를 기반으로 정보자원을 관리하고 있는 조직들을 대상으로 IT 부분에 있어 어떠한 의사결정 형태를 갖고 있는지 연구하였으며, 본 연구에 관한 자세한 내용은 다음과 같이 논의 하였다.

• Journal of the Korea Convergence Society
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• v.8 no.7
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• pp.245-251
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• 2017

The environment of the food service industry is becoming increasingly complicated and unpredictable as modernization and industrialization become more and more common. Moreover, the development of the food service industry is rapidly changing due to the convergence of the inter-industry services. In this study, based on the high reliance on the human resources of the food service industry, it investigates relations of each component as integrated view through leadership, organizational performance, and organizational culture. In particular, the relationship between emotional/primal leadership and organizational performance(as job satisfaction and organizational commitment) was verified through mediating effects of organizational culture. The results of this study will provide an integrated perspective on the understanding and development of the food service industry structure, which requires the importance of human relations, and will help convergent thinking among various service industries.

• Journal of Korea Society of Industrial Information Systems
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• v.14 no.1
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• pp.17-31
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• 2009

The importance of software has been growing rapidly owing to the development of various Internet and e-business applications. The traditional approaches to software evaluation are based on the development process perspective, and their major concerns are no strongly related to use or customer-oriented evaluation of software. According to resource-based theory, company's resource is consisted of human, technology, market value, and finance. Customer satisfaction improved by product satisfaction and service satisfaction. Based on the previous studies the factors of human resources, technology, customer satisfaction are selected to evaluate software company's competence This research suggests the factor effecting on sales performance. And then statistical methods are used for verifying relationship between the factor and sales performance.

• International Area Studies Review
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• v.13 no.2
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• pp.311-368
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• 2009

In order to survive the on-going natural resource war, Korea needs various efforts such as enhancing self-exploitation ratio, increasing the supply of new-reuse energy, strengthening cooperation with resource rich countries. Central Asian countries are geometrically far away from Korea. However, Korea should try to develop political, economic and ethnic relationship with those countries into much higher dimension to secure various natural resources. Major countries including U.S., EU. Japan and China are approaching Central Asian countries with long term perspective. Improving country-image through enlargement of ODA is the first concern of those countries. Korea should try to follow their practices. Government should try to improve Korea's image in the first place and lead economic cooperation with very detailed supportive measures to induce Korean firms' investment into the Central Asian countries. In the due process, a lot of information about those countries' political climate, social situation, ethnical composition, major religions, educational system, current state and structure of economies and industries, etc should be made available to Korean firms.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.8
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• pp.3654-3659
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• 2011

The MAC protocol of HiperLAN/2 is based on TDMA/TDD. The radio channels are assigned by AP(Access Point) that is centrally operated. Mobile terminal that data transmission is necessary to uplink requests radio resource to AP through RCH channels. The changing number of RCHs in each MAC frame is important because too many RCHs may result in a waste of radio resources and too few RCHs may result in many access collisions and prolong time that connect to AP. Therefore, number of RCH should be allocated properly according to traffic. From these viewpoints, this paper proposes an advanced scheme that dynamically changed the number of RCH which is based on the number of success and collision of RR message in previous MAC frame. To prove efficiency of proposed scheme, lots of simulations are conducted and analyzed.

• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.682-686
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• 2009

The MAC protocol of HiperLAN/2 is based on TDMA/TDD. The radio channels are assigned by AP(Access Point) that is centrally operated. Mobile terminal that data transmission is necessary to uplink requests radio resource to AP through RCH channel. The changing number of RCHs in each MAC frame is important because too many RCHs may result in a waste of radio resources and too few RCHs may result in many access collisions and prolong time that connect to AP. Therefore, number of RCH should be allocated properly according to traffic. From these viewpoint, this paper proposes an advanced scheme that dynamically changed the number of RCH which is based on the number of success and collision of RR message in previous MAC frame. To prove efficiency of proposed scheme, a lots of simulations are conducted and analyzed.

• Journal of Information Technology and Architecture
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• v.11 no.3
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• pp.271-283
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• 2014

The government has conducted a management evaluation for business management and main business to establish autonomous responsibility management system of public agencies. And many public agencies build and operate EA for alignment of strategy and technology, information resources management, IT standardization. There are many similarities between management evaluation and EA, such as BSC-based performance management, based on the PDCA management procedures can improve, etc. This paper analyzes the similarities and relationships between the two institutions, research ways to apply to management evaluation in the EA in terms of resource management, strategic management, and performance management. Through this expanded utilization of EA and propose a ways to systematically preparing management evaluation and to operating the performance-based management system.

• IEMEK Journal of Embedded Systems and Applications
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• v.2 no.2
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• pp.128-136
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• 2007

무선 기술이 가지는 장점인 설치의 편리성, 기동성으로 인하여, ZigBee를 이용한 홈 네트워크 서비스 활용성에 대한 기술개발이 활발히 진행되고 있다. 이러한 유비쿼터스 홈 서비스의 활용성에도 불구하고 ZigBee 기반 홈 기기나 센서 정보의 도청, 비정상적인 패킷의 유통, 메시지 재사용등의 데이터 위/변조 문제와 네트워크 전체를 마비시킬 수 있는 서비스 거부 공격등에 쉽게 노출되어 있다. 본 논문에서는 이에 대한 효과적인 대응과 관리 처리를 위하여, 유비쿼터스 홈 네트워크에서의 ZigBee 기술을 사용할 시에 발생할 수 있는 보안 문제점을 해결하기 위한 ZigBee 기반 End-to-End 보안 기술을 개발하였다. 본 기술 개발의 특징은 ZigBee Device, 코디네이터/게이트웨이 영역은 ZigBee 표준 스펙을 구현하였으며, 응용어플리케이션/서버 영역은 표준 스펙이 정의 되어 있지 않으나, 이 부분을 유비쿼터스 홈 네트워크 서비스 관점에서 설계 및 구현하였다. ZigBee 디바이스가 가지는 하드웨어 자원의 빈약성을 고려하여 최대한 보안 기능을 리소스가 풍부한 응용어플리케이션/서버의 자원 활용에 촛점을 맞췄다.