• Title/Summary/Keyword: Cloud Architecture

검색결과 372건 처리시간 0.026초

Goal-driven Optimization Strategy for Energy and Performance-Aware Data Centers for Cloud-Based Wind Farm CMS

  • Elijorde, Frank;Kim, Sungho;Lee, Jaewan
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제10권3호
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    • pp.1362-1376
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    • 2016
  • A cloud computing system can be characterized by the provision of resources in the form of services to third parties on a leased, usage-based basis, as well as the private infrastructures maintained and utilized by individual organizations. To attain the desired reliability and energy efficiency in a cloud data center, trade-offs need to be carried out between system performance and power consumption. Resolving these conflicting goals is often the major challenge encountered in the design of optimization strategies for cloud data centers. The work presented in this paper is directed towards the development of an Energy-efficient and Performance-aware Cloud System equipped with strategies for dynamic switching of optimization approach. Moreover, a platform is also provided for the deployment of a Wind Farm CMS (Condition Monitoring System) which allows ubiquitous access. Due to the geographically-dispersed nature of wind farms, the CMS can take advantage of the cloud's highly scalable architecture in order to keep a reliable and efficient operation capable of handling multiple simultaneous users and huge amount of monitoring data. Using the proposed cloud architecture, a Wind Farm CMS is deployed in a virtual platform to monitor and evaluate the aging conditions of the turbine's major components in concurrent, yet isolated working environments.

Fine Grained Security in Cloud with Cryptographic Access Control

  • Aparna Manikonda;Nalini N
    • International Journal of Computer Science & Network Security
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    • 제24권7호
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    • pp.123-127
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    • 2024
  • Cloud computing services has gained increasing popularity in recent years for supporting various on demand and scalable services for IT consumers where there is a need of less investment towards infrastructure. While storage architecture of cloud enjoys a more robust and fault-tolerant cloud computing network, such architecture also poses a number of security challenges especially when applied in applications related to social networks, Financial transactions, etc. First, as data are stored and maintained by individual virtual machines so Cloud resources are prone to hijacked. Such attacks allow attackers to create, modify and delete machine images, and change administrative passwords and settings successfully. hence, it is significantly harder to ensure data security. Second, Due to dynamic and shared nature of the Cloud, data may be compromised in many ways. Last but not least, Service hijacking may lead to redirect client to an illegitimate website. User accounts and service instances could in turn make a new base for attackers. To address the above challenges, we propose in this paper a distributed data access control scheme that is able to fulfil fine-grained access control over cloud data and is resilient against strong attacks such as compromise and user colluding. The proposed framework exploits a novel cryptographic primitive called attribute-based encryption (ABE), tailors, and adapts it for cloud computing with respect to security requirements

국내 주요도시의 운량데이터를 이용한 일사산출 (Calculation of Solar radiation based on Cloud Data for Major cities of Korea)

  • 유호천;이관호;박소희
    • 한국태양에너지학회:학술대회논문집
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    • 한국태양에너지학회 2008년도 춘계학술발표대회 논문집
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    • pp.142-147
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    • 2008
  • Limited fossil fuels and unstable energy supply are considered as one of the critical problems in architecture requiring large amounts of energy. In order to this challenge, environment-friendly architecture design is required. Especially, Application of solar energy as a clean energy source and one kind of renewable energy. Many sites however are mainly concentrated in the developed countries, and are scarcer within the developing world. Simple radiation estimation models using meteorologically observed input parameters are often used in the applications requiring rough estimations of solar radiation. In this paper, measurements of global solar radiation and cloud data hours in climatological locations in South Korea are used to develop an estimation in solar radiation. The results of measured data are compared with the results obtained from equations, internationally accepted correlations.

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Dynamic Cloud Resource Reservation Model Based on Trust

  • Qiang, Jiao-Hong;Ning, Ding-Wan;Feng, Tian-Jun;Ping, Li-Wei
    • Journal of Information Processing Systems
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    • 제14권2호
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    • pp.377-395
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    • 2018
  • Aiming at the problem of service reliability in resource reservation in cloud computing environments, a model of dynamic cloud resource reservation based on trust is proposed. A domain-specific cloud management architecture is designed in which resources are divided into different management domains according to the types of service for easier management. A dynamic resource reservation mechanism (DRRM) is used to test users' reservation requests and reserve resources for users. According to user preference, several resources are chosen to be candidate resources by fuzzy cluster analysis. The fuzzy evaluation method and a two-way trust evaluation mechanism are adopted to improve the availability and credibility of the model. An analysis and simulation experiments show that this model can increase the flexibility of resource reservation and improve user satisfaction.

클라우드 컴퓨팅을 활용한 모바일 의료영상 볼륨렌더링 아키텍처 (Volume Rendering Architecture of Mobile Medical Image using Cloud Computing)

  • 이웅규;남두희
    • 한국인터넷방송통신학회논문지
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    • 제14권4호
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    • pp.101-106
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    • 2014
  • 전 세계적으로 초고속 인터넷 망의 확충과 스마트폰의 보급에 따라 클라우드 컴퓨팅의 장점을 극대화 할 수 있는 시대가 도래 하였다. 본 연구에서는 클라우드 컴퓨팅을 활용한 모바일 환경에서의 의료영상 볼륨 렌더링 아키텍처를 제안한다. 해당 아키텍처는 값 비싼 워크스테이션 서버와 스토리지를 대체하기 위해 클라우드 컴퓨팅 서비스 중 하나인 IaaS(Infrastructure as a Service)를 사용한다. 그리고 모바일 하드웨어의 제약에서 벗어나 안정적인 렌더링을 위해 WebGL을 이용한 가시화 방법을 제안한다. 이번 연구를 통해서 모바일 환경에서의 효율적인 의료영상 볼륨 렌더링 서비스에 적용될 수 있는 기초 연구가 될 수 있기를 기대한다.

Cloud Robotics Platform 환경에서 Node간 안전한 통신 기법 (Secure Scheme Between Nodes in Cloud Robotics Platform)

  • 김형주
    • 정보처리학회논문지:소프트웨어 및 데이터공학
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    • 제10권12호
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    • pp.595-602
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    • 2021
  • 로봇은 주변 상황을 인지하고 Task를 부여받는 software oriented 형상으로 발전하고 있다. Cloud Robotics Platform은 로봇에 Service Oriented Architecture 형상을 지원하기 위한 방법으로, 상황에 따라 필요한 Task와 Motion Controller를 클라우드 기반으로 제공할 수 있는 방안이다. 휴머노이드 로봇으로 진화할수록 로봇은 로봇 3대 원칙에 따라 보편화된 일상생활 속에서 인간에게 도움을 주기 위해 사용될 것이다. 따라서 특정 개인만을 위한 로봇 이외에도, 상황에 따라 모든 인간에게 도움을 줄 수 있는 공공재로써의 로봇이 보편화될 것이다. 따라서, 생성하는 정보는 사람, 로봇, 로봇에 지능을 부여하는 클라우드 상의 서비스 애플리케이션, 로봇과 클라우드를 이어주는 클라우드 브릿지로 구성될 것으로 분석되는 Cloud Robotics Computing 환경에서 정보보안의 중요성은 인간의 생명 및 안전을 위해 필수불가결한 요소로 자리잡게 될 것이다. 본 논문에서는 지능화된 로봇을 위한 Cloud Robotics Computing 환경에서 사람, 로봇, 클라우드 브릿지, 클라우드 시스템간 통신 시 보안을 제공하여 해킹으로부터 안전하고 개인의 정보가 보호되는 로봇 서비스가 가능할 수 있는 Security Scheme을 제안한다.

확장가능한 대규모 멀티플레이어 온라인 게임을 위한 클라우드와 P2P 하이브리드 구조 (A Hybrid Cloud-P2P Architecture for Scalable Massively Multiplayer Online Games)

  • 김진환
    • 한국인터넷방송통신학회논문지
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    • 제20권3호
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    • pp.73-81
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    • 2020
  • 현재의 대규모 멀티플레이어 온라인 게임(MMOG)에서 전세계 수백만명의 사용자들은 특정 게임을 공유하며 동시에 참여할 수 있다. MMOG의 참여자들이 증가하면 게임 업계에 상당한 비용 증가와 서비스 품질에 영향을 주는 서버 증설 요구 등의 문제가 발생한다. MMOG의 확장성 문제를 해결할 수 있도록 본 논문에서는 클라우드 컴퓨팅과 P2P 하이브리드 구조를 제시한다. P2P와 클라우드 구조의 기능들은 거의 독립적이나 MMOG를 위하여 두 구조의 개념을 융합하고 최종 결합 형태의 응용 연구에 대한 가능성을 고려하였다. 효율적이고 효과적인 자원의 공급과 부하가 배분되는 본 논문의 하이브리드 구조는 참여자의 처리 능력을 활용함으로써 클라우드에 있는 서버의 부하 즉 상당한 규모의 컴퓨팅 능력과 통신량을 경감시킬 수 있다. 시뮬레이션 결과 하이브리드 구조에 기반한 MMOG는 전형적인 클라이언트-서버 시스템에 기반한 MMOG보다 통신량이 감소되며 성능이 향상된 것으로 나타났다.

클라우드 서비스 사용자 관점에서의 취약점과 보안관리체계 (Vulnerability and Security Management System from the Perspective of the Cloud Service Users)

  • 최영진;나종회;홍필기;이상학
    • 정보화연구
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    • 제9권4호
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    • pp.401-411
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    • 2012
  • 정보자원에 대한 투자가 증가하면서 비용절감을 도모할 수 있는 클라우드 컴퓨팅 서비스에 대한 관심이 증가하고 있다. 그러나 클라우드 컴퓨팅은 경제적 이득이라는 장점과 함께 물리적으로 외부에 위치한 정보자원을 활용함에 의해 정보자산 통제와 정보보호의 취약점을 증가시킨다는 단점을 지니고 있다. 이에 본 연구에서는 클라우드 서비스의 고유속성으로 인한 새로운 취약점을 포함하여 클라우드 컴퓨팅의 취약점 도출과 클라우드 컴퓨팅의 취약점 통제항목을 도출한 후, 취약점과 통제항목간의 매핑을 통하여 관리되고 있지 않은 취약점을 파악하여 클라우드 컴퓨팅의 위험요인을 제시하였다.

A Novel Methodology for Auditing the Threats in Cloud Computing - A Perspective based on Cloud Storage

  • Nasreen Sultana Quadri;Kusum Yadav;Yogesh Kumar Sharma
    • International Journal of Computer Science & Network Security
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    • 제24권2호
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    • pp.124-128
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    • 2024
  • Cloud computing is a technology for delivering information in which resources are retrieved from the internet through a web-based tools and applications, rather than a direct connection with the server. It is a new emerging computing based technology in which any individual or organization can remotely store or access the information. The structure of cloud computing allows to store and access various information as long as an electronic device has access to the web. Even though various merits are provided by the cloud from the cloud provides to cloud users, it suffers from various flaws in security. Due to these flaws, data integrity and confidentiality has become a challenging task for both the storage and retrieval process. This paper proposes a novel approach for data protection by an improved auditing based methodology in cloud computing especially in the process of cloud storage. The proposed methodology is proved to be more efficient in auditing the threats while storing data in the cloud computing architecture.

Two-Stage Multichannel Architecture for Oyster Product Management System

  • Yang, Yeong-Yil
    • International Journal of Advanced Culture Technology
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    • 제7권4호
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    • pp.96-103
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    • 2019
  • In this paper, we propose two-stage multichannel architecture for oyster product management system, called cloud stage and agent stage. There are two communication channels at each stage. In cloud stage, the embedded system in the smart scale communicates with the server through two channels, Ethernet or 3G/LTE mobile communication. In agent stage, PCs and smart phones called agents communicate with the server also through Internet and 3G/LTE mobile communication. Compared with previous system in which the amount of the oyster produced in oyster workplaces could be monitored only at the console of only one oyster main server, developed system makes it possible to monitor the amount of produced oyster at several PCs (or smart phones). In addition to the amount of oysters produced at all oyster workplaces the environment of oyster workplaces such as temperature and humidity can be monitored on agents to judge the freshness. Two-stage architecture with multiple channels makes it possible to monitor the amount of oyster product and environment of the oyster workplace at any place in real time.