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    Wyświetlanie 1-7 z 7
    Tytuł:
    Motion capture as a modern technology for analysing ergometer rowing
    Autorzy:
    Skublewska-Paszkowska, M.
    Montusiewicz, J.
    Łukasik, E.
    Pszczoła-Pasierbiewicz, I.
    Baran, K. R.
    Smołka, J.
    Pueo, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/957966.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    motion capture
    ergometer rowing
    biomechanical body parameters
    Opis:
    The paper presents a purpose-built laboratory stand consisting of a Vicon motion capture system with reference video cameras, wireless EMG system, Concept 2 Indoor Rower ergometer, wireless heart rate monitor and the Nexus software. A pilot study of people who exercise on the ergometer helped to create a proper configuration of all the components of the laboratory. Moreover, a procedure for carrying out research was developed, which consists of several steps divided into 4 stages: preparation of the motion acquisition system; preparation of the participant; familiarising participants with the technique of rowing, recording their movements and acquiring other measurement signals. Preliminary analysis of the results obtained from heterogeneous signals from various devices showed that all the components of the research stand are mutually compatible and the received signals do not interfere with one another.
    Źródło:
    Advances in Science and Technology. Research Journal; 2016, 10, 29; 132-140
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza możliwości oczyszczania gazów wylotowych z Hg0 i CO2 na zeolitach syntetycznych otrzymanych z popiołów lotnych
    Possibility of Exhaust Gases Purification from Hg0 and CO2 on Synthetic Zeolites from Fly Ash
    Autorzy:
    Wdowin, M.
    Baran, P.
    Panek, R.
    Zarębska, K.
    Franus, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818585.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    popiół lotny
    zeolit typu Na-X i Ag-X
    Hg0
    CO2
    fly ash
    zeolites types Na-X and Ag-X
    Opis:
    The paper presents the usage possibility of Na-X zeolite as a sorbent of elemental (Hg0) form of mercury or carbon dioxide (CO2). The research material was zeolite obtained in the hydrothermal reaction of fly ash and an aqueous solution of sodium hydroxide. To improve the adsorption capacity of the zeolite with respect to vapour of mercury (Hg0), the zeolite was silver activated by ion exchange method. As a result a form of Ag-X zeolite was obtained. To determine the influence of a modification on sorption capacity of obtained zeolites (Na-X, Ag-X) were subjected to mineralogical and textural characteristics. Then for both zeolites the Hg0 and CO2 sorption studies were performed. Mineralogical analysis of SEM-EDS showed that the sodium ions have been substituted in its entirety with silver ions. After activation of the specific surface area and the share of mesoropores have decreased. However, the share of micropores increased which is associated with substitutions of Na+ ions by ions with a larger ionic radius i.e. silver. Mercury vapour sorption experiment showed almost immediate breakthrough across zeolite Na-X at a flow rate of gas stream at 80 ml/min. Activation of silver greatly improved sorption capacity of tested zeolite and breakthrough of 5% wt. Hg0 occurred after the time of 13017 min. The time for breakthrough of Hg0 for Ag-X is five times longer than for the commercially available activated carbon modified with bromine (AC/Br). Carbon dioxide adsorption studies have shown little effect for sorption capacity for zeolite with silver, where the result for the zeolite Na-X and Ag-X were similar at average level of 25 cm3g-1 for p/p0 = 0.01 (lower values for Ag-X). From obtained results the constants of Dubinin-Raduszkiewicz and Langmuir isotherms were calculated. The monolayer capacity calculated from the equation of Langmuir have shown the lack of differentiation for both examined samples, indicating that the modification of the starting zeolite with silver ions did not improve the sorption capacity with respect to carbon dioxide. Besides in the considered pressure range sorption capacity of zeolites terms to carbon dioxide decreased slightly. The results indicate that the silver modification improves the adsorption of mercury vapour, but has no effect on the sorption of carbon dioxide.
    Źródło:
    Rocznik Ochrona Środowiska; 2015, Tom 17, cz. 2; 1306-1319
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Response of La$\text{}_{1-x}$MnO$\text{}_{3}$/Al$\text{}_{2}$O$\text{}_{3}$ Films
    Autorzy:
    Babonas, G.-J.
    Reza, A.
    Szymczak, R.
    Baran, M.
    Fröhlich, K.
    Jasutis, V.
    Diduszko, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2035658.pdf
    Data publikacji:
    2003-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.66.Li
    75.70.Ak
    Opis:
    La$\text{}_{1-x}$MnO$\text{}_{3}$ films grown by metal organic chemical vapor deposition technique on r-plane cut Al$\text{}_{2}$O$\text{}_{3}$ substrates were investigated. The change of the optical response over the La$\text{}_{1-x}$MnO$\text{}_{3}$/Al$\text{}_{2}$O$\text{}_{3}$ sample surface was investigated along with the temperature dependence of magnetization. The mostly pronounced difference in the spectra of dielectric function occurred in the region of the d-d transitions of Mn-ions. The changes in the optical spectra and magnetic properties were correlated to the structural features of thin film.
    Źródło:
    Acta Physica Polonica A; 2003, 103, 1; 77-83
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface Magnetic Anisotropy of Epitaxial La$\text{}_{0.7}$Mn$\text{}_{1.3}$O$\text{}_{2.84}$ Thin Films
    Autorzy:
    Aleshkevych, P.
    Baran, M.
    Dyakonov, V.
    Szymczak, R.
    Szymczak, H.
    Baberschke, K.
    Lindner, J.
    Lenz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2046886.pdf
    Data publikacji:
    2006-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.50.+g
    75.70.-i
    Opis:
    A spin-wave resonance technique was used to collect information on elementary magnon excitations in high quality epitaxial La$\text{}_{0.7}$Mn$\text{}_{1.3}$O$\text{}_{2.84}$ films prepared by dc-magnetron sputtering. It was found that besides bulk spin-wave modes, the spin-wave resonance spectrum includes also the surface spin waves. The value of spin-wave stiffness constant D=156 meV·Å$\text{}^{2}$ was found. The values of the surface magnetic anisotropy on both surfaces and their angular dependence were determined. The experimentally found spin-wave resonance spectra were explained based on the surface-inhomogeneity model. The effect of surface anisotropy on the spin-wave excitation conditions in epitaxial La$\text{}_{0.7}$Mn$\text{}_{1.3}$O$\text{}_{2.84}$ films was investigated. Spin-wave resonance data give an indirect evidence of periodic charge-ordered stripes formation.
    Źródło:
    Acta Physica Polonica A; 2006, 110, 1; 57-70
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sezonowy przebieg wskaźnika wykorzystania wody (WUE) w lesie sosnowym
    Seasonal Water Use Efficiency (WUE) Index Course in Pine Forest
    Autorzy:
    Ziemblińska, K.
    Urbaniak, M.
    Danielewska, A.
    Baran, M.
    Juszczak, R.
    Chojnicki, B. H.
    Olejnik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1819204.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    wykorzystanie wody
    lasy sosnowe
    flux measurements
    carbon
    exchange
    canopy
    heat
    Opis:
    Assessment of the ecosystem productivity in relation to the amount of water used for such kind of processes have already been investigated for the different ecosystem types by many researchers. Water Use Efficiency (WUE) parameter shows seasonal variation due to changing weather conditions, which determine processes of photosynthesis, respiration and evapotranspiration, and because of biological factors variability. The analysis of the WUE dynamics in the forest ecosystem in Tuczno research station over the hydrological year 2012 were presented in the paper. WUE was calculated based on the daily CO2 and H CO2 O fluxes measured by means of the eddy covariance system (EC) installed over the forest canopy. The fluxes were quality checked in relation to the wind direction, friction velocity values and stationary. The data series used in this investigation were not gap-filled. By using the net value of both fluxes, a good indicator which describe the behavior of the ecosystem as the whole, was obtained. Among a number of weather condition factors, that affect the value of the tested indicator (WUE), mainly photosynthetic photon flux density (PPFD) and the air temperature were evaluated. Separate analysis has been done for daily courses of both CO2 and H2 O fluxes, as well as for WUE for each month of the analyzed period. The highest values of H2 O fluxes (FH) were observed in May and June (0.25 and 0.3 kg m-2s-1) and the lowest in the period from September to December (0.02–0.05 kg m-2s-1). The daily courses of water vapor fluxes revealed dependence to the measured PPFD fluxes, which determines in turn the intensity of the evapotranspiration process. The time courses of the daily 30-min average carbon dioxide fluxes (FC) were also highly variable in each month, similarly to the variances of the FH fluxes. The lowest values of the net F COC were measured in the period from October to December (net CO2 fluxes did not exceed 0.55g m-2 s-1), while in the period from April to July the net ecosystem productivity was the biggest (1.5–2.0 m-2s-1),). WUE reached its minimum in May (7 g [CO2] kg-1), [H2O]), what indicates that the evapotranspiration of the ecosystem was the least effective from the point of view of COCOD absorption from the atmosphere (the ecosystem had a high productivity but it lost a great amount of water at the same time). In contrary, higher WUE values were observed in the colder period of the year, when the amount of available radiant energy was limited. WUE reached its peak in September (nearly 45 g of [CO2] kg-1), [H2O] ) which reveals, that in autumn the decline of evapotranspiration rates were higher than rates of the net CO2 exchange decrease. It also highlights the high adaptability of Scots pine (main species in studied forest ecosystem – 99%), to described conditions. The designated water use efficiency (WUE) parameter, may be used as a good indicator of the current condition of the ecosystem.
    Źródło:
    Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 3; 2780-2798
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tabele wiekowe dla drzew z wczesnosukcesyjnych drzewostanów brzozy brodawkowatej (Betula pendula Roth) na gruntach porolnych
    Age tables for silver birch (Betula pendula Roth) trees for early succession stands on abandoned agricultural lands
    Autorzy:
    Tomusiak, R.
    Ludwisiak, L.
    Bronisz, K.
    Baran, E.
    Bronisz, A.
    Wojtan, R.
    Bijak, S.
    Czajkowski, M.
    Zasada, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/991194.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    grunty porolne
    sukcesja wtorna
    drzewostany brzozowe
    brzoza brodawkowata
    Betula pendula
    cechy biometryczne
    wiek drzew
    age tables
    silver birch
    early succession
    abandoned agricultural lands
    age models
    Opis:
    The paper presents the tables for indirect determination of the age of silver birch (Betula pendula Roth) trees basing on easy to measure dendrometric parameters. We elaborated empirical formulae that enable determination of tree age using total tree height, breast height diameter and stump diameter as the predictors. Data was collected in 40 pure silver birch stands growing on former farmlands in Mazowsze region (central Poland). Sample material consisted of data from the stem analyses of 200 trees and measurements of 600 stumps. Obtained equations explain 70−86% of the age variability. The best fit was achieved for joint use of total tree height and breast height diameter as the independent variables.
    Źródło:
    Sylwan; 2014, 158, 08; 579-589
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural, Magnetic and Transport Properties οf $NdBaCo_{2}O_{5+x}$ Thin Films Deposited by Magnetron Sputtering
    Autorzy:
    Vlakhov, E.
    Szymczak, R.
    Baran, M.
    Piotrowski, K.
    Szewczyk, A.
    Paszkowicz, W.
    Lobanovskii, L.
    Matyajasik, S.
    Nenkov, K.
    Szymczak, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810303.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.70.Ak
    64.75.St
    64.75.Lm
    Opis:
    For the first time, thin films of $NdBaCo_{2}O_{5+x}$ were deposited by RF magnetron sputtering on different substrates. The films deposited on $SrLaAlO_4(001)$ substrates exhibited highly textured structure with c-axis directed out-of-plane. Magnetic measurements M vs. T of three $NdBaCo_{2}O_{5+x}$/$SrLaAlO_4(001)$ films revealed successively paramagnetic-ferromagnetic-antiferromagnetic transitions with decrease in temperature. Their paramagnetic Curie-Weiss temperatures were estimated to be in the range of $T_{C}$ =100-116 K. Resistivity of the cobaltite thin film exhibited insulating behavior and the best fit was found for the variable range hopping mechanism.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 89-91
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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