11 research outputs found

    支援教育品質管理之整合式資訊系統建構與研究

    Get PDF
    [[issue]]4

    A Flow-based Method to Measure Traffic Statistics in Software Defined Network

    Get PDF
    Since software defined network became a revolution of network, many new developments and deployments are put forward. Device operating in software defined network environment will need a controller to store control policy. As a result of flow is one of traffic presentation units in software defined network, hence, this paper proposed a prototype of flow-based method to measure traffic statistics which can be used in OpenFlow network. By analysis of flow table, active flows which managed by controller can be listed, and information of each flow can be presented with developed module on the controller. After gathered port statistics from OpenFlow switch and entries in flow table, information of each flow can be presented on a developed graphic interface. By using this method, Traffic statistics of each flow may be more adaptive and realizable for measurement for observation

    Toward Inter-Connection on OpenFlow Research Networks

    Get PDF
    With the advance of Future Internet technologies, many research issues andideas are growing fast in recent years. In the field of network virtualization, softwaredefined network becomes a common topic on network research. In Taiwan, manyinstitutes and laboratories of universities already built their bench-scale testbed forresearch and educational use with OpenFlow protocol. As time goes by, stitchingexperimental networks is a growing trend to fulfill requirements for large scaleemulation. Hence, this paper revealed a progressing deployment which connectsdifferent experimental networks with centralized control policy. The objective is tobuild an integrated research network with a proposed solution which utilizesOpenFlow protocol to deal with the inter-connections. With a centralized controllerand implemented architecture, the deployment not only solves the limitation of VLANtag number in network but also improves the flexibility of configuration. This designcould be a solution for the realistic constraints of network environment in Taiwan, andit also supports the possibility of stitching regional experimental networks fornetworking research

    Planning and Implantation of NetFPGA Platform on Network Emulation Testbed

    Get PDF
    The concepts of cloud computing and Internet applications have expanded gradually and have become more and more important. Researchers need a new, high-speed network to build experimental environments for testing new network protocolswithout affecting existing traffic. In this paper, we describe a way to integrate NetFPGA platform, OpenFlow concept and NetFPGA reference designs into anetwork testbed to improve the packet processing speed and the dynamic adjustability for network emulation experiments. Furthermore, combined with Tunneling and VPLS, the proposed network testbed can be connected to distributed network, thus providing researchers a traffic-controllable and NIC-programmable experimental networking testbed in intra-communicating part

    Finishing the euchromatic sequence of the human genome

    Get PDF
    The sequence of the human genome encodes the genetic instructions for human physiology, as well as rich information about human evolution. In 2001, the International Human Genome Sequencing Consortium reported a draft sequence of the euchromatic portion of the human genome. Since then, the international collaboration has worked to convert this draft into a genome sequence with high accuracy and nearly complete coverage. Here, we report the result of this finishing process. The current genome sequence (Build 35) contains 2.85 billion nucleotides interrupted by only 341 gaps. It covers ∼99% of the euchromatic genome and is accurate to an error rate of ∼1 event per 100,000 bases. Many of the remaining euchromatic gaps are associated with segmental duplications and will require focused work with new methods. The near-complete sequence, the first for a vertebrate, greatly improves the precision of biological analyses of the human genome including studies of gene number, birth and death. Notably, the human enome seems to encode only 20,000-25,000 protein-coding genes. The genome sequence reported here should serve as a firm foundation for biomedical research in the decades ahead

    支援教育品質管理之整合式資訊系統建構與研究 Design, Implementation and Study of an Integrated Information System for Educational Quality Management

    No full text
    面對外在全球化的高度競爭,與對內高等教育的快速擴張,高等教育品質保證成為近年來備受各方關注的議題。目前雖有相當多關於教育品質內涵、品質保證制度、品質評鑑指標等相關文獻,然而如何能夠有效落實相關機制的研究卻尚不多見。全面落實教育品質管理需要許多人、組織層級的配合,而這也是教育品質管理機制能否成功的重要因素。本研究旨在探討如何以教育品質為核心理念來設計一個整合式支援資訊系統,本研究以行動研究的方法,實際支援某幾所大專院校的教學卓越計畫之實施,嘗試以學理依據來引導實務工作的變革與改進,規劃與施行時間超過4 年,並經由衡量教學卓越成效的問卷來驗證系統實施的成效。本研究主要的結論為:經由全面教育品質管理與成果導向理論的結合,可以發展出一個整合資訊系統的脈絡與架構,得以引領許多原本各自獨立的系統能夠整合,且有效地提升教學品質。由於近年來各大專院校均致力於建置相關資訊系統,本研究可以增進資訊系統工作者對於教育實務工作的理解,本研究的經驗與結果也可作為規劃相關資訊系統的參考,另外也提出許多創新議題值得教育研究者進一步探索。 Under the severe competition of globalization and the rapid expansion of higher education institutions, educational quality has become an important research issue. Although the studies have been conducted extensively on the content of educational quality, mechanism design, and educational quality indicators, little attention has been paid to the deployment of educational quality management and support of information system. In this study, we discuss the design, implementation, enforcement, and initial results of an integrated information system designed around the concept and theories of educational quality. The proposed system has been deployed in a university for four years. Some conclusions of this study are explored. Based on the theory of educational quality and outcome-based education, we can design a framework to guide the design and integration of information systems related to teaching and learning. The initial results indicate that such a system can improve educational quality. This study can serve as a reference design for educational institutions that want to build information systems related to teaching, learning, and educational quality assurance

    On the Implementation of Adaptive Flow Measurement in the SDN-enabled Network: A Prototype

    No full text
    The measurement is an important issue in network management. The measurement results are able to provide helpful information for network administrators. Operating issues such as traffic engineering and traffic accounting also rely on the basis of it. However, the trade-off between accuracy and overhead has to be under consideration. Nowadays, though the Software-Defined Networking technology has been widely changed and made new approaches on the network architectures, montoring the traffic is still a crucial task. This paper presents a group-based flow monitoring scheme to adaptively measure flows in the SDN-enabled network. According to the designed algorithms, the sampling frequency is adjusted from time to time. By doing this, the measurement becomes more adaptive and efficient. This paper also presents a demonstration of the design. The paper aims to illustrate the idea and to share the experience of designing an alternative way for flow measurement in the SDN-enabled network
    corecore