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Wyszukujesz frazę "Markowski, W." wg kryterium: Autor

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    Wyświetlanie 1-10 z 10
    Tytuł:
    Analysis of Performance and Efficiency of Hardware and Software Firewalls
    Autorzy:
    Konikiewicz, W.
    Markowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/108760.pdf
    Data publikacji:
    2017
    Wydawca:
    Społeczna Akademia Nauk w Łodzi
    Tematy:
    firewall
    virtual firewall
    network security
    network performance
    DoS attacks
    Opis:
    Firewalls are key elements of network security infrastructure. They should guarantee the proper level of security and, at the same time, the satisfying performance in order to not increase the packet delay in the network. In the paper, we present the comparative study on performance and security of a few firewall technologies including hardware, software and virtual solutions. Three important criteria are considered: the maximal throughput of firewall, the introduced delay and the ability to resist Denial of Service attacks. We report results of experiments, present analysis and formulate a few practical conclusions.
    Źródło:
    Journal of Applied Computer Science Methods; 2017, 9 No. 1; 49-63
    1689-9636
    Pojawia się w:
    Journal of Applied Computer Science Methods
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Automating the modelling process of involute spur gears with straight teeth
    Autorzy:
    Markowski, T.
    Mucha, J.
    Witkowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/102929.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    involute cylindrical gears
    Delphi programming language
    gears modifications
    Opis:
    In the paper the possibility of using Delphi programming language in the design of the tooth profile was presented. A developed numerical application was used to generate a tooth profile of involute cylindrical gears with modification and without modification. The size of modifications of the tooth root and the addendum was compared with the parameters obtained from the analytical calculations and machining simulation of gears.
    Źródło:
    Advances in Science and Technology. Research Journal; 2013, 7, 19; 66-69
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Localized states in nanocarbons
    Autorzy:
    Kempiński, W.
    Kempiński, M.
    Markowski, D.
    Łoś, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/148234.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    activated carbon fibers (ACF)
    carbon nanotubes
    electron paramagnetic resonance (EPR)
    fullerenes
    Opis:
    Localization phenomenon is studied in different modern nanocarbon materials: pristine C60, C60-fullerides, carbon nanotubes and graphene-based structures in the form of activated carbon fibers built of quantum dot-like basic structural units. Two experimental methods are used to define the localization and population control of spins (charge carriers) in the nanocarbon materials – electron paramagnetic resonance (EPR) and direct current (d.c.) electrical conductivity measurements. Results are discussed in the frame of the possible applications of the aforementioned materials in the molecular electronics or spintronics.
    Źródło:
    Nukleonika; 2013, 58, 3; 371-373
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-Ray Absorption Near Edge Structure Analysis of HgMnSe, HgFeSe and HgTeSe
    Autorzy:
    Burattini, E.
    Kisiel, A.
    Markowski, R.
    Dalba, G.
    Giriat, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1924330.pdf
    Data publikacji:
    1993-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Dm
    Opis:
    Experimental studies of the Se K X-ray absorption edges have been carried out in HgTe$\text{}_{0.5}$Se$\text{}_{0.5}$, Hg$\text{}_{0.8}$Mn$\text{}_{0.2}$Se and Hg$\text{}_{0.9}$Fe$\text{}_{0.1}$Se. A comparison is made for Hg$\text{}_{0.5}$Mn$\text{}_{0.5}$Se and Hg$\text{}_{0.5}$Fe$\text{}_{0.5}$Se theoretical results obtained by the self-consistent, semi-relativistic LMTO method within the LD approximation. Small differences of Se K edge XANES have been shown for HgTeSe and HgSe in contrary to evident differences for HgMnSe and HgFeSe. This behaviour of the absorption Se K edges is related to significant, hybridized contribution of the 3d and 4s Mn or Fe unoccupied states. The maximal contributions of the hybridized bands of the hypothetic zinc-blende MnSe or FeSe were estimated using the virtual crystal model. These maximal contributions are situated at about 6 eV and 17 eV in zinc-blende MnSe and at -0.8 eV and 5.5 eV in zinc-blende FeSe. For HgFeSe apart from the evidence of the strongly localized resonant donor (empty for low Fe concentrations) the complementary hybridized contribution of Fe 3d empty states also situated around the conduction band minimum should be taken into consideration.
    Źródło:
    Acta Physica Polonica A; 1993, 83, 1; 107-114
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multispectral Systems of Imaging Scenery in Critical Infrastructure Protection, Threat Identification and Recognition
    Autorzy:
    Karol, M.
    Szustakowski, M.
    Życzkowski, M.
    Markowski, P.
    Ciurapiński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399365.pdf
    Data publikacji:
    2013-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.30.Wb
    87.57.-s
    42.79.Qx
    Opis:
    The surveillance system more often uses devices working on different bands that are used not only for detection but also to recognize and identify threats. The paper presents the possibility of protection, detection and identification of risks, achieved through the use of multispectral detection systems in critical infrastructure facilities. The authors consider the benefits of active sensors based on other wavebands, such as millimeter wave radar, terahertz cameras, infrared camera and shows the ability to detect and identify the target using data collected by the sensors. Also discussed the issue of fusion data from different sensors and opportunities that the whole system obtained by application of data fusion.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 3; 459-462
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of RF ICP PECVD process parameters of diamond-like carbon films on DC bias and optical emission spectra
    Autorzy:
    Oleszkiewicz, W
    Markowski, J
    Srnanek, R
    Kijaszek, W
    Gryglewicz, J
    Kovac, J
    Tlaczala, M
    Powiązania:
    https://bibliotekanauki.pl/articles/173686.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    PECVD
    diamond-like carbon layers
    OES
    Raman spectroscopy
    AFM
    Opis:
    The work presents the results of a research carried out with PlasmaLab Plus 100 system, manufactured by Oxford Instruments Company. The system was configured for deposition of diamond-like carbon films by ICP PECVD method. The change of an initial value of DC bias was investigated as a function of set values of the generator power (RF generator and ICP generator) in the constant power of the RF generator operation mode. The research shows that the value of DC bias nearly linearly depends on the RF generator power value and is affected only in a small degree by the power of ICP discharge. The capability of an installed OES spectrometer has been used to ensure the same starting conditions for the deposition processes of DLC films. The analysis of OES spectra of RF plasma discharge used in the deposition processes shows that the increase in ICP discharge power value results in the increased efficiency of the ionization process of a gaseous precursor (CH4). The quality of deposited DLC layers was examined by Raman spectroscopy. Basing on the acquired Raman spectra, the theoretical content of sp3 bonds in the structure of the film was estimated. The content is ranging from 30% to 65% and depends on ICP PECVD deposition process parameters.
    Źródło:
    Optica Applicata; 2013, 43, 1; 109-115
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carbon fibrous material for cartilage tissue treatment
    Autorzy:
    Markowski, J.
    Pilch, J.
    Ścierski, W.
    Benko, A.
    Menaszek, E.
    Błażewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/285990.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    cartilage
    chondrogenic materials
    tissue engineering
    carbon fibrous composite
    Opis:
    The work presents in vitro and in vivo experiments related to the evaluation of the biological properties of the two groups of carbon fibrous (micro, nano) materials. We investigated the carbon materials in the form of a biomimetic scaffolds made from carbon nanotubes and a composite membrane made from carbon micro-fiber and biocompatible polymer to induce regeneration of missing cartilage tissues. Evaluation of biological properties of both materials clearly showed that carbon fibrous material is biocompatible with cartilage cells and stimulates regeneration of cartilage tissue.
    Źródło:
    Engineering of Biomaterials; 2014, 17, no. 128-129; 98-99
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of variations in and correlations between selected physical parameters of common beech (Fagus silvatica L.) nuts
    Autorzy:
    Kaliniewicz, Z.
    Markowski, P.
    Anders, A.
    Tylek, P.
    Krzysiak, Z.
    Wasielewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/298426.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    geometric parameters
    mass
    aspect ratio
    separation
    Opis:
    The basic dimensions and the mass of common beech nuts and seeds from five nut batches, harvested from tree stands in northern Poland, were determined. Environmental conditions had a greater influence on seed plumpness than the age of tree stands. The results of measurements were analyzed statistically by analysis of variance, correlation analysis and linear regression analysis. Despite differences in their plumpness, nuts were characterized by nearly identical cross-sections which resembled an equilateral triangle. The thickness of nuts and seeds was highly correlated with their mass, and this information can facilitate seed husking and separation into mass categories. Before and after husking, seeds should be separated with the use of a mesh screen with longitudinal openings. Medium-sized (most numerous) seeds were separated into the following plumpness categories using a screen separator with ≠6 mm and ≠7 mm openings: 84% of moderately plump seeds, 3% of seeds with reduced plumpness, and 13% of plump seeds.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2018, 21(1); 49-63
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electric Conductivity of Carbon Nanoparticles Stimulated by Electric Field
    Autorzy:
    Markowski, D.
    Kempiński, W.
    Kempiński, M.
    Trybuła, Z.
    Kaszyńska, K.
    Śliwińska-Bartkowiak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1535906.pdf
    Data publikacji:
    2010-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.22.Pr
    73.21.La
    73.23.Hk
    73.25.+i
    73.63.-b
    73.23.-b
    Opis:
    Host-guest interactions can be the unique method of spin manipulation in nanoscale. Strong changes in spin localization are generated when potential barriers between nanographitic units of activated carbon fibers are modified by interaction with adsorbed molecules. Stronger modifications occur when dipolar guest molecules are stimulated with external electric field. We report experimental results which show the influence of electric field on the spin localization in activated carbon fibers.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 3; 457-458
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Whipple’s disease as a systemic infectious disease – a case presentation
    Autorzy:
    Maciorkowska, M.
    Ustymowicz, W.
    Zakrzewski, M.
    Pryczynicz, A.
    Markowski, A.
    Romatowski, J.
    Guzińska-Ustymowicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1918601.pdf
    Data publikacji:
    2018-06-21
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    infectious disease
    systemic disease
    Tropheryma whipplei
    Whipple’s disease
    Opis:
    Introduction: Whipple’s disease is a chronic systemic infectious disorder with Tropheryma whipplei as an etiologic agent, occurring rarely and affecting numerous organs and systems. The variety of symptoms and a non-typical course make it difficult to establish a proper diagnosis. Purpose: In this study, etiopathogenesis, diagnostics and treatment of Whipple’s disease were presented based on the case report of 60-year-old man diagnosed with Whipple’s disease. Case presentation: Persistent diarrhoea with weight loss, lymphadenopathy in the abdominal cavity and moderate microcytic anemia predominated in the clinical picture. Diagnosis was put based on the clinical picture and macroscopic assessment of the small intestine and the presence of macrophages filled with a PAS-positive substance in the lamina propria. To deepen diagnostics, samples collected were assessed showing macrophages with the damaged mucosa, containing numerous elongated micro-organisms whose ultrastructure corresponded to Tropheryma whipplei. The patient’s clinical conditions improved after antibiotic therapy. Conclusions: It is vital to remember about Whipple’s disease in patients with chronic diseases due to a non-specific clinical picture and difficulties in establishing a proper diagnosis. When the disease is diagnosed unequivocally, proper and effective antibiotic therapy should be instituted immediately.
    Źródło:
    Progress in Health Sciences; 2018, 8(1); 212-218
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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