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    Wyświetlanie 1-4 z 4
    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:
    Environmental impacts of an opencast mine
    Autorzy:
    Szabo, G.
    Braun, M.
    Koi, R.
    Szabo, S.
    Szegedi, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/87443.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Geograficzne
    Tematy:
    landscape protection
    opencast mine
    settling dust
    wind
    land-use
    analytical measures
    cluster analysis
    discriminant analysis
    Hungary
    Opis:
    An opencast mine may cause negative effects in many ways. Landscape scarrings of opencast mines are harmful in aesthetic respect, engines, machineries and periodic blastings may cause notable noise loading which are injurious even if these mines are situated far from the settlements because the noise from the mines may disturb animals living in the surrounds (Kerényi, 1995, 2003, Barótfi, 2000). Besides the listed impacts the dust accompanied to the opencast mining cause the most significant load to the environment of these mines. In this study, the extent of dust loading is examined in the case of a North-Hungarian perlite mine. Milling of the exploited perlite is carried out in the milling plant located within the area of the mine in Pálháza which cause additional dust loading. Settling dust loading was studied by 22 measurement stations within a distance of 3 kilometres from the mine, during the installation of which even cover of the study area was aimed. Gathering of the dust samples were carried out monthly from August 2004 to July 2006 thus we have a two-year database. During the laboratory tests, the amount of insoluble and soluble dust fractions, altogether making up the total amount of settled dust, was determined respectively. In addition to the meteorological parameters having the most influence on the spatial distribution of the settling dust (i.e. wind velocity, wind directions and the amount of precipitation, air temperature, humidity and irradia-tion) that is why an automatic meteorological station was installed in the proximity of the mine, i.e. within the study area. It gave us the necessary meteorolo-gical data during the examination. Knowing that the most significant dust loading derives from the opencast mine we can not forget that periodically during the agricultural seasons from the arable lands and during the heating seasons through the chimneys additional dust might get into the dust-traps. To determine the origin of the dust in each dust-trap the dust samples were analytical examined as well. By the chemical composition of the samples we could find out how big roles the pollution sources outside the opencast mine played and hereby we could detect how significant the dust loading originated from the perlite mine is in its environment.
    Źródło:
    Prace Komisji Krajobrazu Kulturowego; 2008, 8; 113-126
    1896-1460
    2391-5293
    Pojawia się w:
    Prace Komisji Krajobrazu Kulturowego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CCall-Healthy and Successful Work in Call Centres
    Autorzy:
    Benninghoven, A.
    Bindzius, F.
    Braun, D.
    Cramer, J.
    Ellegast, R.
    Flowerday, U.
    Genz, A.
    Heyden, T.
    Pfeiffer, W.
    Schittly, D.
    Schweer, R.
    Stamm, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/90665.pdf
    Data publikacji:
    2005
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    call centre
    design of work
    indoor environment
    ergonomics
    stress
    work organisation
    guidelines of good practice
    workers with disabilities
    telekomunikacja
    ergonomia
    organizacja pracy
    stres
    organizacja bezpieczeństwa pracy w zakładzie
    centra telefoniczne
    projektowanie miejsc pracy
    Opis:
    Call centre workplaces are in many ways a challenge to occupational health and safety. The occupation itself can be described as an information technology-supported, communication-intensive form of work with often unusual working hours and a high rate of part-time employment. Data on the employee turnover as well as absenteeism related to occupational disability is quite contradictory. Occupational safety and its proponents still have to find new ways into the corporate structures and cultures of this relatively new and rapidly growing branch of industry. In a 2-year research and development project, using a holistic approach and under consideration of all the relevant disciplines, call centre workplaces were studied, and organisational measures were developed and field tested by putting them into practice. Practical help was developed for a sustainable strategy for successful and healthy work in call centres.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2005, 11, 4; 409-421
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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