• Journal of the Korea Institute of Information Security & Cryptology
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• v.11 no.4
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• pp.45-54
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• 2001

It is necessary to control security management consistently and respond to an intrusion automatically in order to use the network securely in the single administrative domain. This paper presents a Shadowing Mechanism supporting a dynamic extension of security scheme and proposes an ARTEMIS(Advanced Realtime Emergency Management and Intruder Identification System), which is designed and implemented based on the suggested technique. It is possible for security management system developed on the basis of the Shadowing Mechanism to make all network components working under the same security scheme. It enhances the accuracy of intrusion tracing and automatic response through dynamic extension of space and time for security management.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.01a
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• pp.105-106
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• 2019

본 논문에서는 무선 센서 네트워크(Wireless Sensor Network, WSN) 환경에 배치되어 물리적 데이터를 감지하는 각 센서들의 데이터를 수집을 위한 싱크(Sink)가 일정 주기로 이동 및 재배치되는 싱크 마이그레이션(Migration) 과정에 있어 다음 배치 위치를 효율적으로 선정하기 위해 클러스터 헤드(Cluster Head, CH)를 기준으로 영역 검색 단계를 추가하여 재배치 정확성 및 효율성 증대 기법을 제안한다. 본 논문에서는 WSN 환경을 바탕으로 싱크 재배치 과정에 해당 기법을 적용하여 시뮬레이션 하였으며, 해당 실험의 결과에 따르면 싱크 재배치의 정확성 및 효율성 증대로 전체 영역에 대한 고른 데이터 수집 및 소모 에너지 균형이 향상되었다.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.17 no.2
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• pp.141-151
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• 2022

This exploratory study was conducted to derive the components of digital entrepreneurship by targeting the experts related to Information and Communication Technology (ICT). Through the review of previous studies and Delphi analysis, the major components of digital entrepreneurship were derived into the 'digital entrepreneurial orientation area' and the 'digital technology competency area'. The components of digital entrepreneurship are innovativeness, proactiveness, risk-taking, desire for achievement, ability to identify digital business opportunities, digital technology utilization capability, digital operation process establishment capability, digital technology development capability, digital technology acceptance, information exchange, and cooperation network establishment, digital-based customer acquisition and management was presented. The importance and execution of success factors were measured through IPA analysis. The first quadrant(keep up the good work) includes proactiveness, ability to identify digital business opportunities, and ability to establish digital business processes. The second quadrant(concentrate here) includes innovativeness, digital technology development capability, and digital technology acceptance. The third quadrant(low priority) includes risk-taking, desire for achievement, digital technology utilization capacity, and digital-based customer acquisition and management. The fourth quadrant(possible overkill) includes information exchange and cooperation network establishment. This study is meaningful in that it presents the concept and components of digital entrepreneurship for digital entrepreneurs that can be applied in Korea.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2003.05a
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• pp.61-67
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• 2003

우리의 선인들은 자연환경과 풍토조건을 고려하여 ‘인간과 자연의 합일’이라는 안정된 생활환경공간을 조성하였는바 복거관에 따라 주거지를 조성하고 경작물재배에 유리한 조건을 만들며 이웃과 공동생활을 영위할 수 있는 삶터를 경영하였으며, 우주관에 따라 생활영역을 구축하여 삶에 대한 의미와 가치를 정신세계로 확장시켜 나가는 형이상학적 관념을 엿볼 수 있게 한다. 즉, 전통마을의 경영에는 하늘과 땅과 사람(천+지+인, 산+수+방위+사람)이 조우하여 균형을 이루고 합일되는 생명영속사상의 준거틀을 운용하여 물질적 풍요는 물론 정신적 풍요를 중시하는 환경설계 철학을 엿볼 수 있다. 특히, 마을의 조영체들을 자연환경 속으로 깊숙이 관입시켜 생태환경에 대한 질서와 평형원리를 존중하는 유기체론적 설계목표를 반영하였다. 안정된 생활환경공간으로서 생태적 네트워크를 구축한 환경설계기법은 입지, 토지이용과 동선, 주거형태, 생태, 영역성, 교육생활문화, 경관, 공동체 구성과 관련된 원칙의 내용을 담고 있다.

• Journal of KIISE:Information Networking
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• v.27 no.4
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• pp.522-530
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• 2000

네트워킹 환경에서 만족스러운 멀티미디어 응용 서비스를 제공하기 위해서는 효과적인 미디어 전송 구조가 필요하다. 그러나 인터넷 같은 일반적인 네트워크는 안정적인 멀티미디어 서비스를 위한 보장된 네트워크 대역폭을 제공하지 않는다. 따라서 종단 시스템에서 멀티미디어 서비스를 지원하기 위한 일반적인 방법으로 버퍼를 사용한다. 기존의 제안된 버퍼 관리 기법은 크게 두가지 영역으로 분류된다. 하나는 변화하는 네트워크 환경에 적응하기 위한 기법이고 다른하나는 요구 대역폭을 평활하하는 기법이다. 그러나 전자는 서비스 풉질의 심각한 손실을 일으킬 수 있고 후자는 동적인 네트워크 환경에 적응할 수 없다는 단점이 있다. 본 논문에서는 동적인 네트워크에 적응하며 대역폭 평활화를 통해 더 좋은 서비스 품질을 제공하는 적응성 있는 대역폭 평활화 기법을 제안한다. 또한 저장된 MPEG 비디오를 이용한 실험을 통해 제안된 기법의 사용으로 비디오 전송 품질이 향상됨을 보인다.

• Journal of the Economic Geographical Society of Korea
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• v.19 no.4
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• pp.642-659
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• 2016

This study examines the characteristics of creative city policy for Japanese culture and arts creation cities and finds the implications of culture and arts city policy by reexamining the examples of Kanazawa and Yokohama from the viewpoint of creation-based strategy of the city. The policy implications of creative-based strategies are as follows. First, in terms of the governance of the creative-based strategy, Kanazawa conducted governance through a citizen-led cooperative network, while Yokohama promoted creative city policy through a local government-led cooperative network. Second, The mechanism of action of the endogenous resources of Kanazawa and Yokohama was different. Third, the territorial embeddedness in Kanazawa and Yokohama was easy for pedestrians to access to the customer center in the creation core area. Both cities have good access to domestic and international demand, and amenity is well established.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10d
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• pp.585-588
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• 2007

WMNs(Wireless Mesh Networks)은 기존 유 무선망 구축 시 발생하는 고가의 비용 및 이동성 제약 등의 단점을 극복하기 위해 제안된 네트워크 구조로써 네트워크 구축비용에 비해 광범위한 인터넷 접근영역을 제공하는 장점을 가진다. 특히, IEEE 802.11e를 MAC 계층으로 사용하는 WMN은 기존 IEEE802.11에서 보다 강화된 QoS(Quality of Service)기능을 가지므로, 안정적 멀티미디어 관련 응용 계층을 지원하는 WMN 구축을 위해 주목받고 있는 기술 중 하나이다. 본 논문은 광주과학기술원에 설치된 MIMC(Multi-Interface Multi-Channel) WMN 테스트베드를 QoS 기능 지원을 위해 IEEE 802.11e 기반으로 확장한다. 특히, 확장에 필요한 소프트웨어 요소 및 하드웨어 요소에 대해 논한다. 또한, 확장된 IEEE 802.11e WMN 테스트베드를 사용하여 현재 주목받고 있는 IEEE 802.11e기반 WMN의 기본 쓰루풋 성능, 쓰루풋 차별화 성능등을 실험적으로 분석한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.13 no.1
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• pp.131-138
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• 2003

With the Internet winning a huge popularity, there rise urgent problems which are related to Network Security Managements such as Protecting Network and Communication from un-authorized user. Accordingly, Using Security equipments have been common lately such as Intrusion Detection Systems, Firewalls and VPNs. Those systems. however, operate in individual system which are independent to me another. Their usage are so limited according to their vendors that they can not provide a corporate Security Solution. In this paper, we present a Hierarchical Security Management Model which can be applicable to a Network Security Policies consistently. We also propose a Policy Negotiation Mechanism and a Prototype which help us to manage Security Policies and Negotiations easier. The results of this research also can be one of the useful guides to developing a Security Policy Server or Security Techniques which can be useful in different environments. This study also shows that it is also possible to improve a Security Characteristics as a whole network and also to support Policy Associations among hosts using our mechanisms.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.11
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• pp.2099-2106
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• 2006

In this paper, we addressed the node positioning method for minimizing the sensing energy consumption in wireless sensor networks with adjustable sensing ranges. It is necessary for minimizing the sensing energy consumption to minimize the overlapped sensing area by neighboring nodes. To find a optimal node position, we derived a optimal equations by using the overlapped areas, each node's radiuses and expended angles of opposite neighboring nodes. Based on it, we devised a new node positioning method, called as ASRC(Adjustable Sensing Ranges Control). Unlike existing condition based model, our proposed method was derived from mathematical formula, and we confirmed its validity of sensing energy consumption through simulations.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.3
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• pp.486-490
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• 2007

Recently, there have been active research efforts on devising efficient routing algorithms utilizing location information in ad-hoc mobile networks. In this paper, we propose a new method to improve the performance of the widely recognized Location Aided Routing (LAR) algorithm. To this end, we suggest the concept of accessible zone combined with the basic two schemes associated with LAR algorithm. Through the proposed algorithm, we can confine the flooding area within accessible zone, thereby reducing the routing delay.