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    Wyświetlanie 1-8 z 8
    Tytuł:
    Radiation synthesis of silver nano- and microparticles in cellulose fibers
    Autorzy:
    Chmielewska, D. K.
    Sartowska, B.
    Starosta, W.
    Walo, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/148546.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    silver particles
    cellulose
    EB irradiation
    Opis:
    Polymer nanocomposites containing metal nanoparticles have attracted a great interest due to their unique chemical and physical properties. “Green” chemistry promotes application of natural fibers in such structures, among them cellulose is one of the most frequently used. However, cellulose fabric have ability to absorb moisture, so under certain conditions of humidity and temperature they can be subjected to microbial attack. One of the most popular and best known antibacterial agents is silver, which serves as a potential antibacterial material acting against an exceptionally broad spectrum of bacteria including activity against antibiotic-resistant bacteria. Silver nanoparticles (Ag NPs) were grown at the cellulose fibers surface by direct reduction of AgNO3 with electron beam (EB) application. Nanocomposites obtained according to the method described in the text were investigated with X-ray diffraction (XRD), scanning electron microscope with back-scattered electrons detector (SEM-BSE) and energy dispersive spectroscopy (EDS) as well as thermogravimetric analysis (TGA) in order to determine influence of different size silver particles on fibers thermal properties.
    Źródło:
    Nukleonika; 2010, 55, 3; 345-349
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Functionalization of polymer surfaces by radiation-induced grafting
    Autorzy:
    Przybytniak, G.
    Kornacka, E. M.
    Mirkowski, K.
    Walo, M.
    Zimek, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/146746.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    radiation grafting
    EPR
    radicals
    radiation yield
    Opis:
    The mutual radiation grafting of acrylic acid (AAc) onto polyethylene (PE), polypropylene (PP) and polystyrene (PS) films was performed. At first stage of investigations, the influence of ionizing radiation on the trunk polymers was studied, i.e. the level of radicals stable at room temperature and radiation yield of evolved hydrogen were estimated for each polymer. The measurements were carried out using electron paramagnetic resonance (EPR) spectroscopy and gas chromatography (GC), respectively. Radiation yields of radicals as well as hydrogen emission increased in the following order PS < PP < PE. Under comparable conditions, the same relationship was found for the yield of radiation-induced grafting of AAc. A distinct correlation between content of radicals generated by ionizing radiation in polymeric matrices and grafting degree was confirmed for the studied materials. The effect of monomer and inhibitor concentrations on the efficiency of processes were studied as well.
    Źródło:
    Nukleonika; 2008, 53, 3; 89-95
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Control network analysis of the dam "Wióry"
    Autorzy:
    Walo, J.
    Szpunar, R.
    Woźniak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/225005.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    zapora ziemna
    sieć kontrolna
    Wióry
    pomiary geodezyjne
    earth dam
    control network
    engineering surveying
    Opis:
    The obtained results of the test measurements in the control network of the dam Wióry show that combined usage of length measurements and GPS observations enables to obtain high accuracy and reliability in defining point coordinates. The real determination accuracy of checkpoint displacements in this type of networks is at the level of (plus minus) 2-3mm. However, it should be added that in small networks covering an area up to 1 km in radius, classical measurements (most of all, length measurements) enable to obtain higher accuracies in determining point coordinates, obviously on condition that the net structure is well-designed and length measurement is possible. Having analyzed the obtained results, one can also formulate the following conclusions: - the assumed structure of a modified test network shows effective accuracy both for EDM measurements and GPS observations, - satellite measurements enable combined and direct observation of points between which there is no sight line. It is especially important in the case of reference points which are usually located around the monitored object, and it is rarely possible to link them by means of classical measurements; - GPS measurements make it possible to check the monitored network independently, at least limiting the incidence of major and systematic errors in processing the results and defining displacement values; so GPS observations may, in the case of small control networks, be treated as control measurements made periodically (e.g. every year); - accuracy assessment made for TDA5005 tachymeter observations even in the case of considerable target inclinations, made by means of standard reflectors, attested reflexive foil and CCR fulfills monitoring requirements of specific point (targets), enabling to obtain an accuracy of the (plus minus) 0.5 mm range in relation to reference points; - linear measurements in the test network of Wiory, made by means of a TDA5005 tachymeter and high precision reflectors can be accomplished within 2-3 days.
    Źródło:
    Reports on Geodesy; 2007, z. 1/82; 376-380
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Scientific expeditions to Svalbard, organized by the Faculty of Geodesy and Cartography, the Warsaw University of Technology (WUT)
    Autorzy:
    Pachuta, A.
    Walo, J.
    Adamek, A.
    Woźniak, M.
    Rajner, M.
    Węzka, K.
    Próchniewicz, D,
    Powiązania:
    https://bibliotekanauki.pl/articles/224476.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    prace geodezyjne
    wyprawa naukowa
    zbiornik paliwa
    wyprawa arktyczna
    Wydział Geodezji i Kartografii PW
    pomiary geodezyjne
    geodetic expeditions
    expedition
    Faculty of Geodesy and Cartography
    fuel tank
    engineering surveying
    Źródło:
    Reports on Geodesy; 2007, z. 1/82; 243-250
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monitoring of Hans Glacier movement dynamics (Hornsund Sw Spitsbergen, Svalbard)
    Autorzy:
    Walo, J.
    Puczko, D.
    Adamek, A.
    Węzka, K.
    Malinowski, Z.
    Rajner, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/224448.pdf
    Data publikacji:
    2006
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    ablacja
    chłodzenie ablacyjne
    Spitsbergen
    ruch lodowca
    lodowiec
    stacja polarna
    ablation
    movement of glacier
    Hans Glacier
    glacier
    polar station
    Opis:
    Fast and exact GPS measurements are independent from weather and season of the year. For achieving reliable results, survey should be conducted at least once a month and at least twice a month in summer season (June-September). GPS RTK is suggested for pole movement determination. In case of real-time corrections limited availability (i.e. screening by mountains) using Rapid Static is a good choice. To minimize multipath error antenna should be placed at least 0,5m eccentric to pole and at 1 m height. Ablation pole movement vectors of Hans glacier indicate few relations. Most important feature is speed being about 10 times greater in foremost zone of glacier than in lateral parties of glacier. Measurements of lateral profile indicate that, accordingly to expectations, surface speed of glacier is greater in middle axis comparing to the edges or glacier.
    Źródło:
    Reports on Geodesy; 2006, z. 1/76; 173-179
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geodynamical investigations in the Pieniny Mountain in 1994-2010
    Autorzy:
    Walo, J.
    Pachuta, A.
    Próchniewicz, D.
    Szpunar, R.
    Olszak, T.
    Barlik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/224922.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    pomiary grawimetryczne
    Pieniny
    gravimetric measurements
    Pieniny Mts.
    Opis:
    Geodynamical investigation in the Pieniny Mountain (south of Poland) were carried out since the 1960s. They contained levelling, gravimetric measurements and distance observations in horizontal network. The results reveled vertical and horizontal movements of the crust and periodic changes in gravity. In 1994-1995 horizontal network was adapted to perform GPS observations and they were carried out with leveling, gravimetric and EDM observations. In 1990s, the Dunajec river dam and the water resorvoirs in Czorsztyn and Sromowce Wyżne have been built. This has a new aspect in investigations releted to the effect of tectonic movements on the dam. Taking that into account, the study was revived, after six year break, in 2001. The investigations, which contain GPS, gravimetric and leveling observations, have been carried out every year. In this paper the result of horizontal displacement obtained from GPS measurement as well as gravity changes in 1994-2010 period are presented and yields linear trend in north-east direction less than 1 mm/year.
    Źródło:
    Reports on Geodesy; 2011, z. 2/91; 29-36
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Scientific expeditions to Antarctic and Spitsbergen with the participation of scientists from Faculty of Geodesy and Cartography, the Warsaw Universitety of Technology (WUT)
    Autorzy:
    Pachuta, A.
    Walo, J.
    Adamek, A.
    Rajner, M.
    Węzka, K.
    Próchniewicz, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/225080.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    wyprawy naukowe
    Politechnika Warszawska
    scientific expedition
    Warsaw University of Technology
    Źródło:
    Reports on Geodesy; 2010, z. 2/89; 21-30
    0867-3179
    Pojawia się w:
    Reports on Geodesy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geodetic and geodynamic studies at Department of Geodesy and Geodetic Astronomy WUT
    Autorzy:
    Brzeziński, A.
    Barlik, M.
    Andrasik, E.
    Izdebski, W.
    Kruczyk, M.
    Liwosz, T.
    Olszak, T.
    Pachuta, A.
    Pieniak, M.
    Próchniewicz, D.
    Rajner, M.
    Szpunar, R.
    Tercjak, M.
    Walo, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/106807.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Warszawska. Wydział Geodezji i Kartografii
    Tematy:
    physical geodesy
    satellite measurement techniques
    GNSS meteorology
    geodynamic studies
    geodezja fizyczna
    technika pomiarów satelitarnych
    meteorologia GNSS
    badania geodynamiczne
    Opis:
    The article presents current issues and research work conducted in the Department of Geodesy and Geodetic Astronomy at the Faculty of Geodesy and Cartography at Warsaw University of Technology. It contains the most important directions of research in the fields of physical geodesy, satellite measurement techniques, GNSS meteorology, geodynamic studies, electronic measurement techniques and terrain information systems.
    Źródło:
    Reports on Geodesy and Geoinformatics; 2016, 100; 165-200
    2391-8365
    2391-8152
    Pojawia się w:
    Reports on Geodesy and Geoinformatics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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