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Wyświetlanie 1-15 z 1179
Tytuł:
Environmental application of electrical discharge for ozone treatment of soil
Zastosowanie wyładowania elektrycznego do ozonowania gleby
Autorzy:
Abiru, T.
Mitsugi, F.
Ikegami, T.
Ebihara, K.
Aoqui, S.-I.
Nagahama, K.
Powiązania:
https://bibliotekanauki.pl/articles/408722.pdf
Data publikacji:
2015
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
ozone treatment
sterilization
soil
nutrient
pH(H2O)
ozonowanie
sterylizacja
gleby
substancje odżywcze
pH (H2O)
Opis:
In this study, influence of ozone treatment on physical properties of soil was investigated. We used a quartz container for ozone treatment of soil. The amount of soil used for treatment was 100 g. Treating time was 90 minutes. Flow rate of ozone gas was 1.5 L/min. We measured characteristics of soil such as inorganic nutrient (NO3-N, NO2-N, and NH4-N), pH(H2O), fungi, DNA of soil, and exchangeable bases (Ca, K, Fe, and Al) before and after ozone treatment.
W niniejszym opracowaniu, opisano badania wpływu obróbki ozonem na własności fizyczne gleby. Do ozonowania gleby wykorzystaliśmy pojemnik kwarcowy. Ilość gleby poddanej działaniu ozonu wynosiła 100g, a czas oddziaływania 90 minut. Przepływ ozonu wyniósł 1.5l/min. Mierzono właściwości gleby, takie jak nieorganiczne składniki odżywcze (NO3-N, NO2-N i NH4-N), pH(H2O), grzyby, DNA w glebie i zasady wymienne (Ca, K, Fe i Al) przed i po poddaniu jej działaniu ozonu
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2015, 4; 42-44
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Element partition trees for h-refined meshes to optimize direct solver performance. Part I: Dynamic programming
Autorzy:
Aboueisha, H.
Calo, V. M.
Jopek, K.
Moshkov, M.
Paszyńska, A.
Paszyński, M.
Skotniczny, M.
Powiązania:
https://bibliotekanauki.pl/articles/330823.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
h-adaptive finite element method
ordering
element partition tree
extensions of dynamic programming
multifrontal direct solvers
metoda elementów skończonych
porządkowanie danych
programowanie dynamiczne
Opis:
We consider a class of two- and three-dimensional h-refined meshes generated by an adaptive finite element method. We introduce an element partition tree, which controls the execution of the multi-frontal solver algorithm over these refined grids. We propose and study algorithms with polynomial computational cost for the optimization of these element partition trees. The trees provide an ordering for the elimination of unknowns. The algorithms automatically optimize the element partition trees using extensions of dynamic programming. The construction of the trees by the dynamic programming approach is expensive. These generated trees cannot be used in practice, but rather utilized as a learning tool to propose fast heuristic algorithms. In this first part of our paper we focus on the dynamic programming approach, and draw a sketch of the heuristic algorithm. The second part will be devoted to a more detailed analysis of the heuristic algorithm extended for the case of hp-adaptive grids.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2017, 27, 2; 351-365
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Propozycja architektury dekodera arytmetycznego standardu H.264/AVC
Context-adaptive binary arithmetic decoder architecture for H.264/AVC
Autorzy:
Abramowski, A.
Pastuszak, G.
Powiązania:
https://bibliotekanauki.pl/articles/156691.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
H.264/AVC
CABAC
dekoder entropijny
dekoder wideo
entropy decoder
video decoder
Opis:
Artykuł przedstawia architekturę binarnego dekodera arytmetycznego standardu H.264/AVC, zdolną do obsługi profilu High. Pozwala ona na dekodowanie w przybliżeniu jednego symbolu w czasie pojedynczego taktu sygnału zegarowego, głównie dzięki modyfikacji kolejności kroków algorytmu oraz wprowadzeniu potokowości w pętli sprzężenia zwrotnego. Architektura została opisana w języku VHDL, a analiza wyników syntezy wskazuje, że umożliwia ona obsługę sekwencji HDTV.
This paper presents a novel architecture of the H.264/AVC binary arithmetic decoder, which conforms to High Profile, including all chroma formats and Macroblock Adaptive Frame/Field coding (MBAFF). It is able to decode almost one symbol per clock cycle, while consuming very limited hardware resources. The main feature of the proposed solution is the parallelization of the feedback loop between the arithmetic decoder core and the context generator, achieved by calculation of two contexts for each possible case in advance and selection of the correct one immediately after the current symbol is available. Some smaller optimizations include the modification of the operation order on the critical path, and the projection of mvd values, allowing economizing the memory usage. The architecture was described in VHDL and realized using TSMC 0.13žm technology. Comparison of the synthesis results and the performance with previous works proves that the proposed architecture maintains the best trade-off between the speed of the video processing and the hardware utilization, while being able to process HDTV in real time.
Źródło:
Pomiary Automatyka Kontrola; 2011, R. 57, nr 1, 1; 49-51
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Pressure and Temperature on AlGaInP and AlGaAs Laser Diodes
Autorzy:
Adamiec, P.
Świetlik, T.
Bohdan, R.
Bercha, A.
Dybała, F.
Trzeciakowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/2036026.pdf
Data publikacji:
2003-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.55.Px
42.60.-v
78.45.+h
Opis:
InGaP/AlGaInP lasers (emitting from 630 to 690 nm) and GaAs/AlGaAs lasers (emitting at 780 nm) were studied under hydrostatic pressure up to 20 kbar and at temperatures from 240 to 300 K. The electrical characteristics, the power-current dependencies and the emission spectra were measured. The emission spectra shifted in agreement with the pressure/temperature variation of the band gaps in active layers of the laser. Since at high pressure theΓ-X separation in the conduction band is strongly reduced (both in AlGaInP and AlGaAs), the dominant loss mechanism of the lasers is the electron leakage to X minima in the p-claddings. This, in turn, leads to high sensitivity of threshold currents to temperature. The dependence of threshold currents on pressure and on temperature is in good agreement with the simple theoretical analysis taking into account the carrier leakage and the radiative and nonradiative recombination. Better agreement between the theory and the experiment is obtained assuming drift rather than diffusion leakage. This indicates that threshold currents could be further reduced if the p-doping is improved in the claddings.
Źródło:
Acta Physica Polonica A; 2003, 103, 6; 585-593
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zakażenia wirusem grypy ptaków u kotów – nowa choroba zakaźna zwierząt w Polsce
Avian influenza virus infections in cats – new infectious animal disease in Poland
Autorzy:
Adaszek, Ł.
Domańska-Blicharz, K.
Janczak, D.
Pisarek, M.
Rypuła, K.
Płoneczka-Janeczko, K.
Skrzypczak, M.
Ziętek, J.
Winiarczyk, S.
Powiązania:
https://bibliotekanauki.pl/articles/28763103.pdf
Data publikacji:
2023
Wydawca:
Krajowa Izba Lekarsko-Weterynaryjna
Tematy:
koty
choroby zwierzat
choroby zakazne
wysoce zjadliwa grypa ptakow
wirus H5N1
infekcja wirusowa
sytuacja epizootyczna
patogeneza
objawy kliniczne
rozpoznanie
leczenie
Źródło:
Życie Weterynaryjne; 2023, 98, 09; 548-551
0137-6810
Pojawia się w:
Życie Weterynaryjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Activating flotation of chalcopyrite using CuSO4 and H2O2 from the cyanide tailings
Autorzy:
Ai, G.
Yan, H.
Qiu, T.
Liu, C.
Powiązania:
https://bibliotekanauki.pl/articles/109562.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
cyanide tailings
chalcopyrite
CuSO4
H2O2
activation mechanism
Opis:
The effects of CuSO4 and H2O2 on the flotation behavior of cyanide chalcopyrite were investigated by flotation tests, microcalorimetry and X-ray photoelectron spectroscopy (XPS). The underlying activation mechanism was studied in the perspective of micro-thermodynamics and surface properties. The flotation results indicated that cyanide chalcopyrite was strongly inhibited by sodium cyanide, with the maximum flotation recovery of 22.5% only. CuSO4 and H2O2 significantly improved the flotation of cyanide chalcopyrite, and the flotation recovery was increased to 92.28% and 84.35%, respectively. The micro-thermodynamics results indicated that the adsorption heat of butyl xanthate on cyanide chalcopyrite surface increased after the addition of CuSO4 and H2O2, as well as the reaction order. CuSO4 and H2O2 can significantly improve the adsorption of butyl xanthate on the surface of cyanide chalcopyrite by decreasing the apparent activation energy by 80.11% and 66.54%, respectively. XPS analysis indicated that the CuCN was generated on the surface of cyanide chalcopyrite, leading to the loss of sulfur and inhibiting the adsorption of collectors. As a result, the flotation of cyanide chalcopyrite was depressed. It is considered that, CuSO4 and H2O2 can improve the flotation of cyanide chalcopyrite by eleminating CuCN from its surface and increasing the concentration of S by 57.02% and 37.48%, respectively.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 2; 578-589
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation Protection by the Barite Coated Fabrics via Image Processing Methodology
Autorzy:
Akarslan, F.
Molla, T.
Akkurt, İ.
Kilinçarslan, Ş.
Üncü, I.
Powiązania:
https://bibliotekanauki.pl/articles/1195237.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.88.+h
28.41.-i
Opis:
According to developing technology and conditions of modern life, use of radiation is rapidly increased. Unwittingly, our organs and tissues are exposed to radiation continuously. In order to avoid exposure to this radiation, some studies were carried out on protective clothing. In this study, radiation keeping properties of the fabrics coated with barite are examined. Radiation keeping properties were also determined by the method of image processing. After the experiments, it is determined that barite-coated fabrics absorb radiation better than normal fabrics.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 316-318
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semi-Empirical Formula with New Coefficients of the (α,n) Reaction Cross-Section
Autorzy:
Akça, S.
Tel, E.
Güngör, S.
Powiązania:
https://bibliotekanauki.pl/articles/1401939.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
25.40.-h
25.60.Dz
Opis:
A new modified semi-empirical formula including non-elastic scattering and Coulomb effects for the (α,n) reaction cross-section was obtained. The available experimental data were used to get the (α,n) reaction cross-section systematics. The dependence between the cross-section and asymmetry term was discussed for (α,n) reaction at 18.5±3 MeV energies classifying the target nuclei into odd Z-even N and even Z-even N. The coefficients of determination (R²) for all classifications were detected to exhibit the amount of relation between asymmetry term and cross-sections obtained from the modified semi-empirical formula with new coefficients.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-128-B-131
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enriched water-H2 18 O purification to be used in routine 18FDG production
Autorzy:
Al Rayyes, A. H.
Powiązania:
https://bibliotekanauki.pl/articles/148761.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
H2 18 O
radiopharmaceuticals
purification
18FDG
Opis:
18O-water obtained from an 2-deoxy-2-[18F]-fluoro-D-glucose (18FDG, Synthera) synthesis unit is used for purification. The purification process consists of ultraviolet (UV) irradiation followed by a distillation in a preevacuated system. After purification, the loss of enriched water was about only 5 per cent. Organic compounds, radioisotopes, trace metals and gases are eliminated efficiently. Results show that there is no significant difference in the production yield of 2-deoxy-2-[18F]-fluoro-D-glucose ([18F]FDG) whether using purified enriched water by the proposed method of purification or using the new enriched water. This method offers the necessary precaution from contamination by tritium during the purification process. The obtained 18FDG or Na-18F using the purified 18O-water is of tritium free.
Źródło:
Nukleonika; 2010, 55, 3; 401-405
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scattering properties of argon gas in the temperature range 87.3-120 K
Autorzy:
Al-Maaitah, I.
Joudeh, B.
Sandouqa, A.
Ghassib, H.
Powiązania:
https://bibliotekanauki.pl/articles/1065068.pdf
Data publikacji:
2016-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.25.Bi
64.10.+h
67.10.Fj
Opis:
A theoretical model, based on the Galitskii-Migdal-Feynman formalism, is introduced for determining the scattering properties of argon gas, especially the "effective" total, viscosity and average cross-sections. The effective phase shifts are used to compute the quantum second virial coefficient in the temperature range 87.3-120 K. The sole input is the Hartree-Fock dispersion (HFD-B3) potential. The thermophysical properties of the gas are then calculated. The results are in good agreement with experimental data.
Źródło:
Acta Physica Polonica A; 2016, 129, 6; 1131-1140
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation and Characterization of a Novel Hyperbranched Polyester Polymers Using A2+B3 Monomers
Autorzy:
Al-Mutairi, Nabeel Hasan
Al-Zubiedy, Ali
Al-Zuhairi, Ali J
Powiązania:
https://bibliotekanauki.pl/articles/26081324.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
hiperrozgałęziony poliester HBP
monomer A2+B3
polycondensation
1H-NMR
GPC
hyperbranched polyester HBP
A2+B3 monomer
Opis:
Compared to linear analogs, hyperbranched polymers (HBPs) have gotten much attention in the last decade because of their intrinsic globular topologies and distinctive features like low viscosity, high solubility, and a high degree of functionality. In this work, four types of hyperbranched polyester polymer HBPs have been synthesized using the A2+B3 polycondensation methodology. Firstly, the starting material B3 monomer (Pyrimidine-2,4,6-triol) has been synthesized using urea and malonic acid with the presence of sodium Na as the catalyst for the reaction. Secondly, four types of materials (tartaric acid TA, adipic acid AD, maleic acid MA, and phthalic anhydride PA) as A2 monomers were added to the starting material B3 monomer in an oil bath to prepare the four types of HBP. The chemical structure of HBPs was characterized by FTIR, and 1H-NMR. The molecular weight of the prepared HBPs was characterized by gel permeation chromatography GPC, and thermal properties were characterized by differential scanning calorimetry DSC and thermal gravimetric analysis TGA. FTIR results showed that there are new bands, such as C-O-C between A2 and B3 monomers, as indicated by 1H-NMR. In addition, GPC shows that the prepared polymers have a narrow molecular weight distribution with good thermal stability, as indicated by DSC and TGA.
Źródło:
Production Engineering Archives; 2023, 29, 1; 28--36
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 1179

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