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    Wyświetlanie 1-9 z 9
    Tytuł:
    SDN Controller Mechanisms for Flexible and Customized Networking
    Autorzy:
    Wytrębowicz, J.
    Ries, T.
    Dinh, K. T.
    Kukliński, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/226926.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    software defined networking
    network controller
    SDN management
    Opis:
    Software-Defined Networking (SDN) is seen as the most promising networking technology today. The spread of a new technology depends on the acceptance of the engineers implementing the networks. Typically, when engineers start the conceptualization of new network devices that work with a new paradigm, and that should provide expected business values, they must identify and utilize technical enablers for the defined business use cases. This paper tries to summarize essential SDN applications and defines the technical enablers for advanced and efficient SDN networking. To this end, we identify the core technical mechanisms, expecting to provide a useful analysis for the design of new SDN networks.
    Źródło:
    International Journal of Electronics and Telecommunications; 2014, 60, 4; 299-307
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    How to bring a scientist and an entrepreneur together?
    Autorzy:
    Ajduk, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/703977.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    social capital
    networking, science
    industry
    education
    mobility
    Opis:
    Polish Scientific Networks: Science and Business conference was held on 30 June – 2 July 2016 in EIT+ Wroclaw Research Centre. Its main aim was to facilitate networking between young Polish researchers working in Poland and abroad, both in academia and in industry. The article focuses on one of the many subjects brought up during the conference panel discussions, i.e. on different ways of increasing the social capital in Poland in order to enhance successful collaborations between science and industry. I discuss the role of education and international  and intersectoral mobility in changing people’s mindset: teaching them mutual trust and opening them for challenge.
    Źródło:
    Nauka; 2016, 4
    1231-8515
    Pojawia się w:
    Nauka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance Evaluation of a Helper Initiated Distributed Cooperative Medium Access Control Protocol for Wireless Networks
    Autorzy:
    Amin, Md. Ruhul
    Hossain, Md. Shohrab
    Powiązania:
    https://bibliotekanauki.pl/articles/227238.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    RTS
    CTS
    cooperative networking
    IEEE 802.11 DCF MAC
    BEB
    Opis:
    Cross layer cooperative protocol which exploits the benefits of physical layer cooperative communication, is one of the widely recognized MAC layer protocol design strategies for future wireless networks. This paper presents performance analysis of a cooperative mac and these performance parameters are compared those of the legacy IEEE 802.11 DCF MAC. Appropriate relay station selection is the main hurdle in designing efficient cooperative MAC protocol for wireless networks. This cooperative mac demonstrated that intermediate relay nodes themselves can initiate cooperation for relaying data frame to the receiver on behalf of the sender. This procedure makes the selection process of a “helper node” more distributed in nature as well as it contributes to increase throughput of a wireless network by reducing the overheads that are usually incurred in the helper selection process. It has been shown by thorough analytical analysis that the proposed cooperative MAC protocol offers higher throughput and lower frame transmission delay in both ideal and error prone wireless environment. These performance metrics are also evaluated while the wireless nodes are mobile as well.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 3; 421-428
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hierarchical structure of academia in academic social networking sites: the case study of Adam Mickiewicz University in Poznań
    Autorzy:
    Ciereszko, Kinga
    Powiązania:
    https://bibliotekanauki.pl/articles/704165.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    academic social networking sites
    Academia.edu
    ResearchGate
    hierarchy in academia
    Opis:
    This article analyses a hierarchical structure of academia within two academic social media networking sites, i.e. Academia.edu and ResearchGate. In this study, I investigate profiles (in these two services) of all academic staff members of Adam Mickiewicz University in Poznań (N = 2661). I use the concept of prestige to analyse whether the hierarchical structure of academia is being reproduced in analysed services. Since prestige is an unobservable construct, I use two indicators to measure it: the number of followers and the number of views. My findings show that the hierarchical structure differs between Academia.edu and ResearchGate. While the structure of ResearchGate is explicitly hierarchical in reference to degrees of the researchers (a higher degree is related to a higher value of the prestige indicators), the structure of Academia.edu resembles a reversed pyramid (a higher degree is related to a lower value of the prestige indicators). The article concludes with a discussion concerning possible causes of differences between services in terms of reproducing the hierarchical structure. Moreover, I provide potential implications of the results as well as the justification of the necessity of using the concept of prestige to determine hierarchical structure of academia.
    Źródło:
    Nauka; 2019, 2
    1231-8515
    Pojawia się w:
    Nauka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Novel Software-Defined Networking Controller : the Distributed Active Information Model (DAIM)
    Autorzy:
    Pupatwibul, P.
    Banjar, A.
    Hossain, M. I.
    Braun, R.
    Moulton, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/226996.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    distributed network
    OpenFlow
    DAIM model
    software defined networking
    next generation networks
    Opis:
    This paper presents a new OpenFlow controller: the Distributed Active Information Model (DAIM). The DAIM controller was developed to explore the viability of a logically distributed control plane. It is implemented in a distributed way throughout a software-defined network, at the level of the switches. The method enables local process flows, by way of local packet switching, to be controlled by the distributed DAIM controller (as opposed to a centralised OpenFlow controller). The DAIM ecosystem is discussed with some sample code, together with flowcharts of the implemented algorithms. We present implementation details, a testing methodology, and an experimental evaluation. A performance analysis was conducted using the Cbench open benchmarking tool. Comparisons were drawn with respect to throughput and latency. It is concluded that the DAIM controller can handle a high throughput, while keeping the latency relatively low. We believe the results to date are potentially very interesting, especially in light of the fact that a key feature of the DAIM controller is that it is designed to enable the future development of autonomous local flow process and management strategies.
    Źródło:
    International Journal of Electronics and Telecommunications; 2018, 64, 2; 209-216
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Potencjalne implikacje społeczno-ekonomiczne akcesji do sieci Cittàslow w erze przyspieszenia
    Potential Socio-Economic Implications of Accession to Cittàslow Network in Acceleration Era
    Autorzy:
    Zawadzka, A. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2031723.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Acceleration era
    Cittàslow
    globalization
    networking
    Slow Cities
    slow movement
    small cities
    revitalization
    Opis:
    Cittàslow – Międzynarodowa sieć miast dobrego życia, jest pochodną założonego we Włoszech przez Carlo Petriniego w 1989 r. Slow Food – Międzynarodowego ruchu dla ochrony prawa do przyjemności, promującego tradycyjne dla regionu potrawy i lokalne produkty, w manifeście którego zapisano, że nieustępliwa obrona spokojnej materialnej przyjemności jest jedynym sposobem przeciwstawienia się globalnemu szaleństwu szybkości. W 1999 r. merowie Orvieto (Umbria) Greve in Chianti (Toskania), Bra (Piemont) i Positano (Campania) rozszerzyli ideę slow na styl życia i sposób zarządzania miastem w celu dbałości o dziedzictwo kulturowe – w tym architektoniczne – i ochronę środowiska naturalnego. Cittàslow jest odpowiedzią na globalizację i homogenizację miast, aby w ich zgiełku nie ucichło to, co stanowi o lokalnej unikatowości. Jednak, jak twierdzi Honoré [2011: 99] ruch powolnościowy ma za cel zachowanie tradycyjnej architektury, rzemiosła i kuchni, ale jednocześnie z entuzjazmem odnosi się do najlepszych zdobyczy współczesnego świata. Powolne Miasto zadaje pytania: czy dane rozwiązanie poprawia jakość naszego życia? Jeśli odpowiedź brzmi „tak”, wówczas miasto przyjmuje to rozwiązanie.
    The article includes partial results of research on the movement Cittàslow, which has no background in detailed theses and assumptions – the method applied is of phenomenological nature. The purpose of this part of the research was to identify the potential socio-economic implications of membership of Cittàslow network. The research conducted with the use of the non-reactive methods such as the analysis of source materials. Methods implemented during the empirical research are mainly qualitative ones: participant observation and in-depth interviewing with mayors, local leaders and citizens. The research gives the answer to the question: what can benefit the city by joining the Cittàslow network?
    Źródło:
    Biuletyn Komitetu Przestrzennego Zagospodarowania Kraju PAN; 2017, 266; 125-141
    0079-3493
    Pojawia się w:
    Biuletyn Komitetu Przestrzennego Zagospodarowania Kraju PAN
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Facebook - platforma algorytmicznej towarzyskości i technologia siebie
    Autorzy:
    Halawa, Mateusz
    Powiązania:
    https://bibliotekanauki.pl/articles/985802.pdf
    Data publikacji:
    2013-12-01
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sociology of the individual social networking sites association
    socjologia jednostki
    serwisy społecznościowe
    uspołecznienie
    Opis:
    This article is a sociological analysis of the social networking site Facebook. It is based on two premises: (1) that Facebook is a case of technical association, in which the individual and the relations between individuals are in part shaped by algorithms and interfaces, and that (2) this form of association becomes particularly salient in the culture of individualism, which promotes an expressive self doing self-work. The article is composed of two parts. In the first, the author describes the consequences of the fact that a Facebook friendship is not completely a human affair, but rather an affair between humans and technology that has agency. Modifying the classical concept of sociability offered by Simmel, the author analyzes Facebook in terms of ‘algorithmic sociability. In the second part the author describes how Facebook’s interface and the relations that Facebook arranges configure the individual. Facebook is analyzed in terms of Foucault’s concept of ‘technologies of the self.
    Źródło:
    Kultura i Społeczeństwo; 2013, 57, 4; 117-144
    2300-195X
    Pojawia się w:
    Kultura i Społeczeństwo
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of possible SDN use in the rapid prototyping processas part of the Industry 4.0
    Autorzy:
    Mazur, D.
    Paszkiewicz, A.
    Bolanowski, M.
    Budzik, G.
    Oleksy, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/200245.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rapid prototyping
    software defined networking
    industry 4.0
    computer networks
    szybkie prototypowanie
    Przemysł 4.0
    sieć komputerowa
    SDN
    Opis:
    The article refers to the idea of using the software defined network (SDN) as an effective hardware and software platform enabling the creation and dynamic management of distributed ICT infrastructure supporting the rapid prototyping process. The authors proposed a new layered reference model remote distributed rapid prototyping that allows the development of heterogeneous, open systems of rapid prototyping in a distributed environment. Next, the implementation of this model was presented in which the functioning of the bottom layers of the model is based on the SDN architecture. Laboratory tests were carried out for this implementation which allowed to verify the proposed model in the real environment, as well as determine its potential and possibilities for further development. Thus, the approach described in the paper may contribute to the development and improvement of the efficiency of rapid prototyping processes which individual components are located in remote industrial, research and development units. Thanks to this, it will be possible to better integrate production processes as well as optimize the costs associated with prototyping. The proposed solution is also a response in this regard to the needs of industry 4.0 in the area of creating scalable, controllable and reliable platforms.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 1; 21-30
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Matching-Based Virtual Network Function Embedding for SDN-Enabled Power Distribution IoT
    Autorzy:
    Li, Xiaoyue
    Chen, Xiankai
    Zhou, Chaoqun
    Liang, Zilong
    Liu, Shubo
    Yu, Qiao
    Powiązania:
    https://bibliotekanauki.pl/articles/2055212.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    power distribution internet of things
    software defined networking
    virtual service orchestration
    virtual network function embedding
    priority-aware
    matching theory
    Opis:
    The power distribution internet of things (PD-IoT) has the complex network architecture, various emerging services, and the enormous number of terminal devices, which poses rigid requirements on substrate network infrastructure. However, the traditional PD-IoT has the characteristics of single network function, management and maintenance difficulties, and poor service flexibility, which makes it hard to meet the differentiated quality of service (QoS) requirements of different services. In this paper, we propose the software-defined networking (SDN)- enabled PD-IoT framework to improve network compatibility and flexibility, and investigate the virtual network function (VNF) embedding problem of service orchestration in PD-IoT. To solve the preference conflicts among different VNFs towards the network function node (NFV) and provide differentiated service for services in various priorities, a matching-based priority-aware VNF embedding (MPVE) algorithm is proposed to reduce energy consumption while minimizing the total task processing delay. Simulation results demonstrate that MPVE significantly outperforms existing matching algorithm and random matching algorithm in terms of delay and energy consumption while ensuring the task processing requirements of high-priority services.
    Źródło:
    International Journal of Electronics and Telecommunications; 2021, 67, 4; 647--653
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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