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Wyszukujesz frazę "Strzęciwilk, D." wg kryterium: Autor


Wyświetlanie 1-5 z 5
Tytuł:
Examination of Transmission Quality in the IP Multi-Protocol Label Switching Corporate Networks
Autorzy:
Strzęciwilk, D.
Powiązania:
https://bibliotekanauki.pl/articles/227144.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
P/MPLS network
DiffServ architecture
VoIP
transmission quality
quality of service
Opis:
The paper presents the examination of quality of transmission designed and built based on IP/MPLS technology as well as BGP and OSPF routing protocols of corporate network. It indicates the factors forming and affecting the service quality in IP network, including QoS support network architecture, particularly the architecture of DiffServ differentiated services. Main problems occurring in these architectures have been discussed. The analysis of data and voice transmission via IP network of Best Effort architecture and in Differentiated Service architecture of differentiated transmission quality have been conducted. It has been presented that the MPLS technology may be effectively applied in building corporate networks requiring network services of highest quality parameters with lossless packet transmission and maximum delay guarantee.
Źródło:
International Journal of Electronics and Telecommunications; 2012, 58, 3; 267-272
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk assessment for ERP system implementation
Autorzy:
Nafkha, R.
Strzęciwilk, D.
Powiązania:
https://bibliotekanauki.pl/articles/95151.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
ERP implementation system
risk value
risk assessment
wdrożenie systemu ERP
wartość ryzyka
ocena ryzyka
Opis:
In this article, based on the results of questionnaire sent to 50 companies with different employment size, events affecting the failures of the ERP system implementation were identified and their risk level as well as additional costs related to preventive actions (reducing the probability or effects of the problem occurrence) were investigated. To evaluate the risk values of chosen ERP system implementation tasks, PMI (Project Management Institute) standard was applied.
Źródło:
Information Systems in Management; 2014, 3, 3; 182-192
2084-5537
2544-1728
Pojawia się w:
Information Systems in Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of tungsten surface interaction with plasma streams at DPF-1000U
Autorzy:
Ladygina, M. S.
Skladnik-Sadowska, E.
Zaloga, D. R.
Malinowski, K.
Sadowski, M. J.
Kubkowska, M.
Kowalska-Strzeciwilk, E.
Paduch, M.
Zielinska, E.
Miklaszewski, R.
Garkusha, I. E.
Gribkov, V. A.
Powiązania:
https://bibliotekanauki.pl/articles/147638.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
DPF-1000U
electron density
gas puffing
plasma stream
tungsten
Opis:
In this note experimental studies of tungsten (W) samples irradiated by intense plasma-ion streams are reported. Measurements were performed using the modified plasma focus device DPF-1000U equipped with an axial gas-puffing system. The main diagnostic tool was a Mechelle®900 optical spectrometer. The electron density of a freely propagating plasma stream (i.e., the plasma stream observed without any target inside the vacuum chamber) was estimated on the basis of the half-width of the Dβ spectral line, taking into account the linear Stark effect. For a freely propagating plasma stream the maximum electron density amounted to about 1.3 × 1017 cm–3 and was reached during the maximum plasma compression. The plasma electron density depends on the initial conditions of the experiments. It was thus important to determine first the plasma flow characteristics before attempting any target irradiation. These data were needed for comparison with plasma characteristics after an irradiation of the investigated target. In fact, spectroscopic measurements performed during interactions of plasma streams with the investigated W samples showed many WI and WII spectral lines. The surface erosion was determined from mass losses of the irradiated samples. Changes on the surfaces of the irradiated samples were also investigated with an optical microscope and some sputtering and melting zones were observed.
Źródło:
Nukleonika; 2015, 60, 2; 293-296
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Project and analysis of solutions applied in e-learning systems
Autorzy:
Strzęciwilk, D.
Sierant, P.
Nafkha, R.
Powiązania:
https://bibliotekanauki.pl/articles/95107.pdf
Data publikacji:
2016
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
e-learning system
training course
e-learning platform
Opis:
The article presents attempts to identify the needs and problems of modern e-learning and designed a solution that meets the needs of the recipients of e-learning and e-learning content providers. On the basis of this analysis, it was found that the market lacks the e-learning platform that meets all the needs and requirements in remote education. E-learning systems are very poor functionally, and tools for achieving the objectives, such as content creation, content distribution, management learning, and synchronous online meetings appear as separate applications that do not necessarily work well together. Most often each of them must be used separately that extends the preparation of training materials, and is a burden in the administration and supervision of the training course. On the basis of the analysis of remote training needs of recipients and creators of content proposed solution supporting distance learning. On the basis of the analysis of literature and research of user behavior designed and developed an integrated e-learning platform that meets the expectations of the users. The system has successfully motivating tool to complete training and does not require expensive implementation. The main objective of the proposed system was to eliminate the disadvantages observed in other systems. It was found that the human factor impeding the effective acquisition of knowledge as lack of motivation for self-study and the lack of contact with the teacher. In order to minimize the impact of these factors on the educational goals proposed solutions such as elements of competition and extensive virtual classrooms.
Źródło:
Information Systems in Management; 2016, 5, 2; 260-271
2084-5537
2544-1728
Pojawia się w:
Information Systems in Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies of plasma interactions with tungsten targets in PF-1000U facility
Autorzy:
Ladygina, M. S.
Skladnik-Sadowska, E.
Zaloga, D. R.
Sadowski, M. J.
Kubkowska, M.
Kowalska-Strzeciwilk, E.
Krawczyk, N.
Paduch, M.
Miklaszewski, R.
Garkusha, I. E.
Powiązania:
https://bibliotekanauki.pl/articles/147524.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
plasma-surface interaction
plasma streams
tungsten
plasma focus
PF-1000U
Opis:
This paper presents results of experimental studies of tungsten samples of 99.95% purity, which were irradiated by intense plasma-ion streams. The behaviour of tungsten, and particularly its structural change induced by high plasma loads, is of great importance for fusion technology. The reported measurements were performed within a modifi ed PF-1000U plasma-focus facility operated at the IFPiLM in Warsaw, Poland. The working gas was pure deuterium. In order to determine the main plasma parameters and to study the behaviour of impurities at different instants of the plasma discharge, the optical emission spectroscopy was used. The dependence of plasma parameters on the initial charging voltage (16, 19 and 21 kV) was studied. Detailed optical measurements were performed during interactions of a plasma stream with the tungsten samples placed at the z-axis of the facility, at a distance of 6 cm from the electrode outlets. The recorded spectra showed distinct WI and WII spectral lines. Investigation of a target surface morphology, after its irradiation by intense plasma streams, was performed by means of an optical microscope. The observations revealed that some amounts of the electrodes material (mainly copper) were deposited upon the irradiated sample surface. In all the cases, melted zones were observed upon the irradiated target surface, and in experiments performed at the highest charging voltage there were formed some cracks.
Źródło:
Nukleonika; 2016, 61, 2; 149-153
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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