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    Wyświetlanie 1-7 z 7
    Tytuł:
    The influence of tool composite’s structure during process of diamond grinding of ceramic materials
    Autorzy:
    Gawlik, J.
    Niemczewska-Wójcik, M.
    Krajewska, J.
    Sokhan, S. V.
    Paščenko, E. A.
    Žuk, T. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/407111.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ceramic materials
    modified diamond tools
    surface geometric structure
    Opis:
    This paper presents the results of the tests performed during the grinding process of the ceramic materials: - polycrystalline ceramics (Zirconium ZrO2) and mono-crystalline ceramics (sapphire -Al2O3) by the diamond tools. Studies have shown that the concentration (thickening) of the tool composite changes the tool’s pore structure when using suitable wetted adamantine additives. Such modified composite has positive impact on tribological properties of the subsurface layer of the machined components. This is manifested by the reduction of the surface roughness and reduction of the vibration amplitude of the coefficient of friction. The possibilities of the positive effects when using wetted additives on the tool’s composite during the pressing (briquetting) stage confirm the study results.
    Źródło:
    Management and Production Engineering Review; 2014, 5, 4; 9-17
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effects of seeding rate, mineral fertilization and a growth regulator on the economic and energy efficiency of durum wheat production
    Wpływ gęstości siewu, mineralnego nawożenia i regulatora wzrostu na ekonomiczną i energetyczną wydajność pszenicy twardej
    Autorzy:
    Bozek, Kamila S.
    Winnicki, Tomasz
    Zuk-Golaszewska, Krystyna
    Powiązania:
    https://bibliotekanauki.pl/articles/2216674.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
    Tematy:
    conomic and energy efficiency
    Triticum durum
    ekonomiczna i energetyczna wydajność
    Opis:
    Background. The effects of agrotechnical factors have an influence on a major portion of total operational and non-operational energy inputs. The aim of this study was to analyze the effects of various agronomic factors on the economic and energy efficiency of Triticum durum L. production. Material and methods. The analyzed factors in the production of durum wheat were mineral fertilization rates (0, 80 and 120 kg N∙$ha^(-1)$), seeding rate (350, 450 and 550 kernels·$m^(-2)$) and the application of a growth regulator. Total energy consumption was calculated for the evaluated technologies of spring durum wheat production, including nitrogen fertilization, plant protection, agricultural machinery, transport and the associated operations. Results. The value of wheat grain production was highest at 2227.86 USD∙$ha^(-1)$ in the production technology with a fertilizer application rate of 120 kg∙$ha^(-1)$ N and a seeding rate of 550 kernels·$m^(-2)$ . This variant was also characterized by the highest production costs of 1017.17 USD∙$ha^(-1)$ . The economic efficiency (cost-benefit ratio) was highest (2.32) in the production technology with a fertilizer rate of 120 kg∙$ha^(-1)$ and a seeding rate of 350 kernels·$m^(-2)$. The energy efficiency ratio was highest in the unfertilized treatment with a seeding rate of 350 kernels·$m^(-2)$ . This technology was characterized by the highest energy efficiency both when the energy value of grain (5.62) and the energy value of grain and straw (8.40) were taken into account. Conclusion. The production technology with a fertilization rate of 120 kg∙$ha^(-1)$ and a seeding rate of 550 kernels·$m^(-2)$ generated the highest profits. Technology with a fertilization rate of 120 kg∙$ha^(-1)$ and a seeding rate of 550 kernels·$m^(-2)$ had the highest energy inputs (22.60 GJ∙$ha^(-1)$ ). The cost-benefit ratio was highest in the production technology with a fertilization rate of 120 kg∙$ha^(-1)$ and a seeding rate of 350 kernels·$m^(-2)$. Energy gain was highest in the production technology with a fertilization rate of 120 kg∙$ha^(-10)$ and a seeding rate of 550 kernels$·m^(-2)$ at 82.88 (grain) and 137.03 (grain + straw) $GJ∙ha^(-1)$.
    Pszenica twarda jest zbożem konsumpcyjnym, które swoimi właściwościami wkomponowuje się w obecne trendy żywnościowe. Celem badań była analiza efektywności ekonomicznej i energetycznej produkcji Triticum durum L. Czynnikami badań roślin pszenicy durum były: poziom nawożenia mineralnego 0, 80 i 120 kg N·$ha^(-1)$, gęstość siewu (350, 450 i 550 ziarniaków·$m^(-2)$) i regulator wzrostu. Całkowite zużycie energii dla systemów produkcji formy jarej pszenicy durum obliczono na podstawie nawożenia azotem, ochrony roślin i maszyn, transportu oraz wszystkich wykonanych zabiegów. Najwyższą wartość ziarna – 2227.86 USD∙$ha^(-1)$ – uzyskano w technologii o poziomie nawożenia 120 kg∙$ha^(-1)$ N i obsadzie 550 ziarniaków·$m^(-2)$. Poziom poniesionych w tym wariancie kosztów był również najwyższy – 1017.17 USD∙$ha^(-1)$. Najkorzystniejsza relacja uzyskanych wyników ekonomicznych i poniesionych kosztów (2,32) wystąpiła w przypadku nawożenia azotem na poziomie 120 kg∙$ha^(-1)$ oraz obsadzie 350 ziarniaków·$m^(-2)$. Najkorzystniejszy wskaźnik relacji energii uzyskanej do włożonej w produkcję uzyskano w technologii bez nawożenia azotem i w przypadku siewu o gęstości 350 ziarniaków·m2 (N0, SD0). Wskaźnik ten był najwyższy zarówno w przypadku uwzględnienia wartości energetycznej ziarna (5,62), jak ziarna i słomy (8,40).
    Źródło:
    Acta Scientiarum Polonorum. Agricultura; 2019, 18, 3; 133-144
    1644-0625
    Pojawia się w:
    Acta Scientiarum Polonorum. Agricultura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    III-V Quantum Dots in Dielectrics Made by Ion Implantation and Flash Lamp Annealing
    Autorzy:
    Prucnal, S.
    Turek, M.
    Gao, K.
    Zhou, S.
    Pyszniak, K.
    Droździel, A.
    Żuk, J.
    Skorupa, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400484.pdf
    Data publikacji:
    2013-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.30.Fs
    78.67.Hc
    81.05.Ea
    81.07.Ta
    81.15.Lm
    Opis:
    Different semiconductor nanocrystals synthesized in dielectrics on silicon are very interesting for applications in non-volatile memories and photovoltaics. In this paper we present an overview of microstructural and opto-electronic properties of different III-V quantum dots embedded in $SiO_2$ and $Si_3N_4$ made by sequential ion implantation and millisecond range flash lamp annealing. It is shown that within 20 ms post-implantation annealing high quality crystalline III-V quantum dots can be formed in different matrices. Formation of crystalline III-V quantum dots was confirmed by cross-section transmission electron microscopy, photoluminescence and μ-Raman spectroscopy. Flash lamp annealing is essentially a single-flash-single-wafer technique whose main attributes are the ease and control of processing over large wafer batches.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 5; 935-938
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Hot Implantation on Residual Radiation Damage in Silicon Carbide
    Autorzy:
    Rawski, M.
    Żuk, J.
    Kulik, M.
    Droździel, A.
    Lin, L.
    Prucnal, S.
    Pyszniak, K.
    Turek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1504145.pdf
    Data publikacji:
    2011-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.U-
    78.30.-j
    61.05.Np
    63.50.-x
    79.20.Rf
    81.70.Fy
    Opis:
    Remarkable thermomechanical and electrical properties of silicon carbide (SiC) make this material very attractive for high-temperature, high-power, and high-frequency applications. Because of very low values of diffusion coefficient of most impurities in SiC, ion implantation is the best method to selectively introduce dopants over well-defined depths in SiC. Aluminium is commonly used for creating p-type regions in SiC. However, post-implantation radiation damage, which strongly deteriorates required electric properties of the implanted layers, is difficult to anneal even at high temperatures because of remaining residual damage. Therefore implantation at elevated target temperatures (hot implantation) is nowadays an accepted method to decrease the level of the residual radiation damage by avoiding ion beam-induced amorphization. The main objective of this study is to compare the results of the Rutherford backscattering spectroscopy with channeling and micro-Raman spectroscopy investigations of room temperature and 500°C $Al^{+}$ ion implantation-induced damage in 6H-SiC and its removal by high temperature (up to 1600°C) thermal annealing.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 1; 192-195
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of Linola and W92/72 transgenic flax seeds on the rabbit caecal fermentation - in vitro study
    Autorzy:
    Mista, D.
    Kroliczewska, B.
    Zawadzki, W.
    Pecka, E.
    Steininger, M.
    Hull, S.
    Zuk, M.
    Szopa, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/30370.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The effect of W92/72 transgenic flax seeds taken from a variety of Linola on the production of SCFA, ammonia and methane by bacteria inhabiting rabbit caecum was studied. The in vitro method was used where caecal contents from rabbits was incubated with W92/72 transgenic or Linola flax seeds, or without any additives (control samples).The total concentration of SCFA was higher in samples with the addition of flax seeds than in the control samples. The increase in concentrations of acetic, propionic and butyric acids was the highest in samples with Linola seeds added. A higher percentage of propionic and butyric acids was observed in the contents incubated with addition of flax seeds as compared to the control samples. This increase was the result of a percentage decrease in acetic acid. No differences were observed in the concentration of ammonia between fermented samples. Moreover, the addition of flax seeds resulted in slight decrease of pH in incubated samples. In gas samples, the methane level was higher in samples with flax seeds added, although the highest level was found in samples with transgenic seeds.In addition, gas pressure was significantly higher in samples with flax seeds added as compared to control samples, and this may indicate a higher intensity of microbiological fermentation processes. These studies suggest that neither Linola nor W92/72 flax seeds have any unfavorable effect on the caecal microflora activity of rabbits. A beneficial influence of flax seeds on the microbiological fermentation process in rabbit caecum was observed, based on an increase in percentage ratio of propionic acid in samples with flax seeds added.
    Źródło:
    Polish Journal of Veterinary Sciences; 2011, 14, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Pattern Fabrication in Amorphous Silicon Carbide with High-Energy Focused Ion Beams
    Autorzy:
    Tsvetkova, T.
    Takahashi, S.
    Sellin, P.
    Gomez-Morilla, I.
    Angelov, O.
    Dimova-Malinovska, D.
    Zuk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1503892.pdf
    Data publikacji:
    2011-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    41.75.Ak
    42.70.Ln
    68.37.Uv
    73.61.Jc
    Opis:
    Topographic and optical patterns have been fabricated in a-SiC films with a focused high-energy (1 MeV) $H^{+}$ and $He^{+}$ ion beam and examined with near-field techniques. The patterns have been characterized with atomic force microscopy and scanning near-field optical microscopy to reveal local topography and optical absorption changes as a result of the focused high-energy ion beam induced modification. Apart of a considerable thickness change (thinning tendency), which has been observed in the ion-irradiated areas, the near-field measurements confirm increases of optical absorption in these areas. Although the size of the fabricated optical patterns is in the micron-scale, the present development of the technique allows in principle writing optical patterns up to the nanoscale (several tens of nanometers). The observed values of the optical contrast modulation are sufficient to justify the efficiency of the method for optical data recording using high-energy focused ion beams.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 1; 56-59
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of primary care physicians and nurses in convincing patients to participate in a colorectal cancer screening program in a Polish coordinated care organization: a questionnaire-based study
    Autorzy:
    Guzek, M.
    Szafraniec-Burylo, S.
    Wyrebiak, A.
    Kowalczyk, D.
    Bukato, G.
    Prusaczyk, A.
    Zuk, P.
    Czech, M.
    Kurpas, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1773.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Opolski. Instytut Nauk o Zdrowiu
    Opis:
    Background: Medical assistants/care coordinators play a crucial role in the coordinated care system. The tasks of nurses and some qualified supporting staff have been extended to include this role along with the implementation of the pilot program POZ Plus in Polish primary healthcare. A personalized approach to the patient is especially important during the implementation of large-scale prevention programs. Aim of the study: To assess who has the greatest influence on the patient’s decision to undergo screening colonoscopy and outline the current and potential roles of nurses in this process. Material and methods: This questionnaire-based study was conducted at the coordinated care facility Medical and Diagnostic Center (CMD) in Siedlce, Poland between March 1st and June 15th, 2017. Results: 138 patients participated in the study. The majority (75; 54.4%) reported they were directly convinced to undergo colonoscopy by a primary care physician. 18 (13.0%) were convinced by a nurse, and 22 (15.9%) by another specialist. The remaining (23; 16.7%) patients indicated other factors. The majority of patients (74; 53.6%) responded saying that all necessary information about the entire test course was provided by the nurse, while 35 (25.4%) shared that this information had come from the primary care physician, 8 (5.80%) from the specialist doctor, 3 (2.17%) from the receptionist and 18 (13.0%) from other sources of information, such as the Internet, leaflets and notice boards. Conclusions: We found that primary care physicians at this institution have an important role in convincing patients to undergo preventive colonoscopy, while nurses provide key information to patients on the preparation and the course of this procedure. Although the current model seems to be effective in a coordinated care setting, there may be still a place for nurse care coordinators to take on some tasks previously performed by doctors.
    Źródło:
    Medical Science Pulse; 2019, 13, 2
    2544-1558
    2544-1620
    Pojawia się w:
    Medical Science Pulse
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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