• 제목/요약/키워드: Reconfiguration and adaptation

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군 모바일 단말기를 위한 자가적응 소프트웨어 기반 MOSAIC 아키텍처 설계 및 검증 (A Design and Verification of MOSAIC Architecture Based on Self-Adaptive Software for the Military Mobile Equipment)

  • 김종영;윤희병
    • 한국군사과학기술학회지
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    • 제13권5호
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    • pp.852-860
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    • 2010
  • An environment in which the software is operated become more complex and changed dynamically. Such software requires the ability to adapt in accordance with operating environments, by monitoring the changes of user requirements and operating environments. Especially, the mobile device used in military operation requires more dynamical adaptation than the mobile device in normal environment. In this paper, we propose MOSAIC architecture based on Self-Adaptive Software suitable for military mobile device and verify the results. The proposed architecture consists of context manager, evaluation manager and adaptation manager. We simulate the MOSAIC architecture by modelling PRE(Position Reporting Equipment) used in the army and verify four types of operational mode and dynamical reconfiguration of user interface.

모듈러 로봇의 작업 적응성을 위한 자가 재구성 제어 엔진 (Design of Self-Reconfigurable Kinematics and Control Engine for Modular Robot)

  • 도현민;최태용;박동일;김두형;손영수
    • 로봇학회논문지
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    • 제11권4호
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    • pp.270-276
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    • 2016
  • This paper proposes a design methodology of self-reconfigurable kinematics and control engine for modular and reconfigurable robots. A modular manipulator has been proposed to meet the requirement of task adaptation in versatile needs for service and industrial robot area and the function of self-reconfiguration is required to extend the application of modular robots. Kinematic and dynamic contexts are extracted from the module and assembly information and related codes are automatically generated including controller. Thus a user can easily build and use a modular robot without professional knowledge. Simulation results are presented to verify the validity of the proposed method.

Dynamic Cell Reconfiguration Framework for Energy Conservation in Cellular Wireless Networks

  • Son, Kyuho;Guruprasad, Ranjini;Nagaraj, Santosh;Sarkar, Mahasweta;Dey, Sujit
    • Journal of Communications and Networks
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    • 제18권4호
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    • pp.567-579
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    • 2016
  • Several energy saving techniques in cellular wireless networks such as active base station (BS) selection, transmit power budget adaptation and user association have been studied independently or only part of these aspects have been considered together in literature. In this paper, we jointly tackle these three problems and propose an integrated framework, called dynamic cell reconfiguration (DCR). It manages three techniques operating on different time scales for ultimate energy conservation while guaranteeing the quality of service (QoS) level of users. Extensive simulations under various configurations, including the real dataset of BS topology and utilization, demonstrate that the proposed DCR can achieve the performance close to an optimal exhaustive search. Compared to the conventional static scheme where all BSs are always turned on with their maximum transmit powers, DCR can significantly reduce energy consumption, e.g., more than 30% and 50% savings in uniform and non-uniform traffic distribution, respectively.

4G network에서 재구성성을 위한 개방형 API (The open API for reconfiguration in 4G network)

  • 홍성준;이용수
    • 한국컴퓨터정보학회논문지
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    • 제10권6호
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    • pp.219-226
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    • 2005
  • 본 논문은 4G 이동 네트워크 환경에서 재구성성을 제공하기 위한 방안으로 PARLAY X기만의 개방형 API에 관하여 서술하였다. 4C이동 네트워크 환경에서는 망 수준에서 문맥인식성, 적응성, 개인화 등과 같은 지능성이 요구된다. 그러나 기존의 PARLAY 기반 서비스 네트워크는 문맥인식성, 적응성, 개인화 등의 지능성에 대한 고려가 부족하다. 그러므로 본 논문의 목적은 4G이동 네트워크 환경에서 문맥인식성, 적응성, 개인화 등이 지원 가능한 개방형 APl를 개발하고자 하는 것이다. 본 논문에서 개방형 API는 사용자 주변에 변화하는 문맥 제약조건 및 사용자 각 개인의 선호도 정보을 파악하여, 변화하는 문맥 제약 조건 및 사용자의 선호도에 따라서 각 개인에게 적합한 적응성 있는 망 서비스를 제공하는 것을 의미하며, 개방형 API를 이용하는 예로 위치와 속도 등의 문맥정보와 사용자의 선호도 정보를 파악한 후에, 사용자에게 망에서 문맥정보 및 사용자 선호도에 따라서 각 개인에게 적합한 차별화된 QoS를 지원하는 경우를 보였다.

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Filtering and Intrusion Detection Approach for Secured Reconfigurable Mobile Systems

  • Idriss, Rim;Loukil, Adlen;Khalgui, Mohamed;Li, Zhiwu;Al-Ahmari, Abdulrahman
    • Journal of Electrical Engineering and Technology
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    • 제12권5호
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    • pp.2051-2066
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    • 2017
  • This paper deals with reconfigurable secured mobile systems where the reconfigurability has the potential of providing a required adaptability to change the system requirements. The reconfiguration scenario is presented as a run-time automatic operation which allows security mechanisms and the addition-removal-update of software tasks. In particular, there is a definite requirement for filtering and intrusion detection mechanisms that will use fewer resources and also that will improve the security on the secured mobile devices. Filtering methods are used to control incoming traffic and messages, whereas, detection methods are used to detect malware events. Nevertheless, when different reconfiguration scenarios are applied at run-time, new security threats will be emerged against those systems which need to support multiple security objectives: Confidentiality, integrity and availability. We propose in this paper a new approach that efficiently detects threats after reconfigurable scenarios and which is based on filtering and intrusion detection methods. The paper's contribution is applied to Android where the evaluation results demonstrate the effectiveness of the proposed middleware in order to detect the malicious events on reconfigurable secured mobile systems and the feasibility of running and executing such a system with the proposed solutions.

동적 QoS 속성을 고려한 단일 웹서비스의 교환을 지원하는 프레임워크 (A Framework to Support Reconfiguration of Single Web Service Based on Dynamic QoS Properties)

  • 진상찬;이은주
    • 한국컴퓨터정보학회논문지
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    • 제14권4호
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    • pp.77-86
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    • 2009
  • 현재 웹 어플리케이션을 구축하는데 있어 웹서비스는 중요한 역할을 담당하게 되었다. 웹서비스의 수와 종류가 많아짐에 따라, QoS는 웹서비스의 선택과 조합에서 중요한 기준이 되었다. 하지만 웹서비스의 QoS요소는 실행환경에 따라 동적으로 변하고, 이로 인해 선택된 웹서비스가 요청자의 QoS요구사항에 부합하지 않는 웹서비스가 되기도 한다. 본 논문에서는 요청자의 QoS요구사항에 적합한 웹서비스를 찾고 웹서비스의 QoS에 기반하여 웹서비스를 동적으로 변경하는 프레임워크를 제안하였다. 그리고 웹서비스 변경 시 발생하는 웹서비스의 인터페이스적응문제와 수행중인 작업의 보장문제에 대한 해결방법도 함께 제시한다.

Knowledge-driven Dynamic Capability and Organizational Alignment: A Revelatory Historical Case

  • Kim, Gyeung-Min
    • Asia pacific journal of information systems
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    • 제20권1호
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    • pp.33-56
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    • 2010
  • The current business environment has been characterized as less munificent, highly uncertain and constantly evolving. In this environment, the company with dynamic capability is reported to be more successful than others in building competitive advantage. Dynamic capability focuses on the link between a dynamically changing environment, strategic agility, architectural reconfiguration, and value creation. Being characterized to be flexible and adaptive to market circumstance changes, an organization with dynamic capability is described to have high resource fluidity, which represents business process, resource allocation, human resource management and incentives that make business transformation faster and easier. Successful redeployment of the resources for dynamic adaptation requires organizational forms and reward systems to be well aligned with firm's technological infrastructures and business process. The alignment is considered to be an executive level commitment. Building dynamic capability is knowledge driven; relying on new knowledge to reconfigure firm's resources. Past studies established the link between the effective execution of a knowledge-focused strategy and relevant setting of architectural elements such as human resources, structure, process and information systems. They do not, however, describe in detail the underlying processes by which architectural elements are adjusted in coordinated manners to build knowledge-driven dynamic capability. In fact, understandings of these processes are one of the top issues in IT management. This study analyzed how a Korean corporation with a knowledge-focused strategy aligned its architectural elements to develop the dynamic capability and thus create value in the dynamically changing markets. When the Korean economy was in crisis, the company implemented a knowledge-focused strategy, restructured the organization's architecture by which human and knowledge resources are identified, structured, integrated and coordinated to identify and seize market opportunity. Specifically, the following architectural elements were reconfigured: human resource, decision rights, reward and evaluation systems, process, and IT infrastructure. As indicated by sales growth, the reconfiguration helped the company create value under an extremely turbulent environment. According to Ancona et al. (2001), depending on the types of lenses the organization uses, different types of architecture will emerge. For example, if an organization uses political lenses focusing on power, influence, and conflict. the architecture that leverage power and negotiate across multiple interest groups would emerge. Similarly, if an organization uses economic lenses focusing on the rational behavior of organizational actors making choices based on the costs and benefits of action, organizational architecture should be designed to motivate and provide incentives for the actors (Smith, 2001). Compared to this view, information processing perspectives consider architecture to be designed to maximize the capacity of information processing by the actors. Using knowledge lenses, the company studied in this research established architectural elements in a manner that allows the firm to effectively structure knowledge resources to form dynamic capability. This study is revelatory single case with a historic perspective. As a result of this study, a set of propositions and a framework are derived, which can be used for architectural alignment.

VENGEANCE, VIOLENCE, VAMPIRES: Dark Humour in the Films of Park Chan-wook

  • Hughes, Jessica
    • 비교문화연구
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    • 제28권
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    • pp.17-36
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    • 2012
  • This essay places the South Korean film Thirst (2009) within Park Chan-wook's oeuvre as a filmmaker notorious for graphic depictions of violence and revenge. Park's use of dark humour in his films, which is emphasized in Thirst perhaps more than ever, allows for a more self-aware depiction of violence, where both the viewer and the protagonist are awakened to the futility of revenge. This ultimately paints his characters as fascinatingly crazy - simultaneously heroes, villains, and victims. Film theorist Wes D. Gehring's three themes of dark humour ('man as beast,' 'the absurdity of the world,' and 'the omnipresence of death') become most obvious in Park's most recent film, which pays closer attention to character development through narrative detail. Rather than portraying the characters as sentimental, dark humour depicts their misfortunes in an alternative way, allowing for consideration of such taboo subjects as religion, adultery, and death/suicide. These issues are further tackled through Thirst's portrayal of its vampire protagonist, which ultimately de-mystifies the traditional vampire figure. While this character has more often been associated with romance, exoticism and the mystical powers of the supernatural, Thirst takes relatively little from the demons of Nosferatu (Murnau, 1922) and various other Dracula adaptations, nor the romantic figures of Interview with the Vampire (Jordan, 1994), and Twilight (Hardwicke, 2008). Instead, it is part of a much smaller group of contemporary vampire films, which are rather informed by a postmodern reconfiguration of the monster. Thus, this paper examines Thirst as an important contribution to the global and hybrid nature of those films in which postmodern vampires are sympathetic and de-mystified, exhibiting symptoms stemming from a natural illness or misfortune. Park's undertaking of a vampire film allows for a complex balance between narrative and visuals through his focus on the Western implications of this myth within Korean cinema. This combination of international references and traditional Korean culture marks it as highly conscious of New Korean Cinema's focus on globalization. With Thirst, Park successfully unites familiar images of the vampire hunting and feeding, with more stylistically distinct, grotesque images of violence and revenge. In this sense, dark humour highlights the less charming aspects of the vampire struggling to survive, most effective in scenes depicting the protagonist feeding from his friend's IV in the hospital, and sitting in the sunlight, slowly turning to ash, in the final minutes of the film. The international appeal of Park's style, combining conventions of the horror/thriller genre with his own mixture of dark humour and non-linear narrative, is epitomized in Thirst, which underscores South Korea's growing global interest with its overt international framework. Furthermore, he portrayal of the vampire as a sympathetic figure allows for a shift away from the conventional focus on myth and the exotic, toward a renewed construction of the vampire in terms of its contribution to generic hybridization and cultural adaptation.