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    Wyświetlanie 1-11 z 11
    Tytuł:
    Calculation of Reaction Cross Sections for Producing Br-75 in the Energy Range of 5-40 MeV
    Autorzy:
    Salman, H.
    Oruncak, B.
    Ünal, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401984.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    25.60.Dz
    Opis:
    The isotope of bromine, ⁷⁵Br ($T_{1/2}$ = 1.6 h), has a considerable interest in nuclear medicine. The radionuclide ⁷⁵Br is a positron emitter and is useful in positron emission tomography (PET) for fast metabolic processes. In this study the reaction cross sections were calculated for suggested various production mechanisms. The cross sections of charged particle-induced reactions, leading to ⁷⁵Br, were calculated for ⁷⁶Se(p,2n)⁷⁵Br, ⁷⁶Se(d,3n)⁷⁵Br, ⁷⁵As(³He,3n)⁷⁵Br and ⁷⁵As(⁴He,4n)⁷⁵Br using TALYS 1.6. The calculated results are compared with measurement data available in literature. The calculated results indicate that, ⁷⁶Se(p,2n)⁷⁵Br and ⁷⁶Se(d,3n)⁷⁵Br reaction channels have higher cross section values than that of ⁷⁵As(³He,3n)⁷⁵Br reaction channel. Moreover all these reaction channels are in the range of a medium-sized cyclotron.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-225-B-227
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    (n,2n) and (n,3n) Neutron Induced Reaction Cross Sections above 8 MeV
    Autorzy:
    Salman, H.
    Ünal, R.
    Oruncak, B.
    Akçaalan, U.
    Yalim, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401991.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    24.10.-i
    Opis:
    Neutron induced reaction cross sections for (n,2n) and (n,3n) have been calculated in the energy range between 8 MeV and 26 MeV. Calculations were made for the target nuclei; $\text{}^{45}Sc,$ $\text{}^{59}Co,$ $\text{}^{89}Y,$ $\text{}^{93}Nb,$ $\text{}^{103}Rh,$ $\text{}^{169}Tm,$ $\text{}^{175}Lu,$ $\text{}^{181}Ta,$ $\text{}^{197}Au,$ $\text{}^{209}Bi$. Calculated results were compared with the available data in EXFOR. Model calculations of present data indicated clearly that some reported data from measurements failed to separate (n,2n) and (n,3n) contributions.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-231-B-235
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chromium Ions Removal by Capacitive Deionization Process: Optimization of the Operating Parameters with Response Surface Methodology
    Autorzy:
    Issa, Zainab M.
    Salman, Rasha H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2202352.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    capacitive deionization
    electrosorption
    carbon fibre
    chromium
    wastewater
    Opis:
    An innovative desalination method called electrosorption or capacitive deionization (CDI) has significant benefits for wastewater treatment. This process is performed by using a carbon fiber electrode as a working electrode to remove hexavalent chromium ions from an aqueous solution. The pH, NaCl concentration, and cell voltage were optimized using the Box-Behnken experimental design (BDD) in response surface methodology (RSM) to study the effects and interactions of selected variables. To attain the relationship between the process variables and chromium removal, the experimental data were subjected to an analysis of variance and fitted with a quadratic model. The optimum conditions to remove Cr(VI) ions were: pH of 2, a cell voltage of 4.3V, and NaCl concentration of 1.4 g/L. This study demonstrated that the carbon fiber electrode was very efficient in Cr(VI) ions removal and the BBD methodology was a practical and effective strategy for predicting the results of various experimental conditions during a CDI process for the removal of chromium ions.
    Źródło:
    Journal of Ecological Engineering; 2023, 24, 1; 51--65
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure of Primary Energy Mix, Electricity Production and Emissions from Power Sector in Ethiopia, Pakistan, Poland, Spain and Turkey
    Struktura pierwotnych źródeł miksu energetycznego, produkcji energii elektrycznej i emisji z sektora energetycznego w Etiopii, Pakistanie, Polsce, Hiszpanii i Turcji
    Autorzy:
    Bal, M.
    Ramos, C. A.
    Haile, E. G.
    Salman, H. M.
    Szejelewski, F.
    Bogacka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/357145.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Śląska
    Tematy:
    energy
    electricity
    emission
    energia
    elektryczność
    emisje
    Opis:
    In this article, a review of energy mix, electricity production and emissions from power sector of Ethiopia, Pakistan, Poland, Spain and Turkey is investigated. The choice of countries is varied to let see how it looks in different parts of the world. The time interval chosen to show some changes that follow. Primary energy consumption of the countries is given in percentage of resources used. Electricity production of the countries are analyzed in 2006 and 2011 respectively. Furthermore, emissions of CO2, NOx SOx and PM are compared with respect to population and area and GDP. As a result, the analysis of the highest and lowest emitting countries are presented in the article.
    W artykule przedstawiono przegląd źródeł miksu energetycznego, produkcji energii elektrycznej i emisji z sektora energetycznego w Etiopii, Pakistanie, Polsce, Hiszpanii i Turcji. Wybór krajów jest zróżnicowany aby przybliżyć jak wygląda to w różnych częściach świata. Przedział czasu dobrano tak, aby pokazać pewne zmiany, które następują. Zużycie energii pierwotnej krajów podane jest w procentach zasobów używanych. Produkcja energii elektrycznej z wymienionych krajów jest analizowana odpowiednio dla danych z roku 2006 i 2011. Ponadto, emisje CO2, NOx SOx i PM są porównywane pod względem ludności , powierzchni i produktu krajowego brutto - PKB. W rezultacie, przedstawiono analizę najbardziej i najmniej uciążliwych pod względem emisji krajów porównywanych.
    Źródło:
    Archiwum Gospodarki Odpadami i Ochrony Środowiska; 2014, 16, 2; 93-106
    1733-4381
    Pojawia się w:
    Archiwum Gospodarki Odpadami i Ochrony Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Work-related musculoskeletal disorders among information technology professionals in Riyadh, Saudi Arabia
    Autorzy:
    Alghadir, Ahmad H.
    Khalid, Salman
    Iqbal, Zaheen A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2152945.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    occupational health
    IT professionals
    COVID-19
    Riyadh
    ergonomics
    desktop use
    Opis:
    Background This study was done to see the prevalence of work-related musculoskeletal disorders among information technology (IT) professionals in Saudi Arabia, the risk factors associated with them, their consequences, and to propose some preventive measures. Material and Methods A self-administered online questionnaire that included questions on the demographic data, job nature, medical history, work-related pain after joining information technology profession and distribution and severity of pain was sent to 250 information technology professionals working in Saudi Arabia. Results Out of 250, 202 (81%) IT professionals participated in the study. At least 62 (32%) reported that they have developed some type of musculoskeletal pain after joining their profession and 38 (61%) respondents further reported that it was so severe that they had to seek some sort of treatment for their pain. On the Visual Analog Scale ranging 0–10, 14 (23%) respondents reported that their worst ever pain was >7. Despite lower representation 67% of the females reported to develop work-related pain. Conclusions Development of work-related musculoskeletal pain among information technology professionals has been shown to affect their activities of daily living. It may even force them to change their work setting or reduce working hours. Information technology sector has rapidly grown in Saudi Arabia in the recent times and there is no data on the incidence or prevalence of such disorders among them. Role of ergonomics and counseling should be emphasized during their training that help them work effectively and efficiently. A similar large-scale study should be conducted to see the effect of lifestyle related to COVID-19 on the lives of working population especially IT professionals.
    Źródło:
    Medycyna Pracy; 2022, 73, 5; 397-406
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Yttrium Oxide Reinforcement on the Microstructural and Mechanical Properties of Biologically Derived Hydroxyapatite
    Autorzy:
    Bozkurt, Y.
    Gokce, H.
    Pazarlioglu, S.
    Salman, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401436.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.85.jf
    Opis:
    In the present study, hydroxyapatite used as a matrix material was derived from the femur bones of Meleagris gallapova (MGHA) and then reinforced with yttriyum oxide (Y₂O₃, 5 and 10 wt.%). Then samples pelleted at 350 MPa were sintered between 900 and 1300°C. Finally, the effect of Y₂O₃ reinforcement on the microstructural and mechanical properties of MGHA was investigated. Scanning electron microscope (SEM) and X-ray diffraction (XRD) patterns were used for microstructural examinations. Density, microhardness and compressive strengths of composites were used to analyze their mechanical properties. Experimental results show that mechanical properties of composites were enhanced by increasing the temperature. The optimum results were obtained for MGHA-10% Y₂O₃ composites sintered at 1200°C.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1403-1406
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation and Study of Some Electrical Properties of PVA-Ni(NO3)2 Composites
    Autorzy:
    Salman, S.A.
    Bakr, N. A.
    Mahmood, M.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/411873.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    polyvinyl alcohol
    Casting method
    Electrical properties
    Composites
    Opis:
    The aim of this paper is to prepare and study the (D.C.) electrical conductivity of (PVA-Ni(NO₃)₂) composites at different temperatures. For that purpose, PVA films with Ni(NO₃)₂ salt additive were prepared with different concentrations 2, 4, 6, 8 and 10 wt. % and with thickness of 45μm by using casting technique. The experimental results for PVA-Ni(NO₃)₂) films show that the (D.C.) electrical conductivity increased with increasing the filler content and the temperature, and the activation energy was decreased with increasing the filler content.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2015, 40; 36-42
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydroxyapatite Lanthanum Oxide Composites
    Autorzy:
    Bozkurt, Y.
    Pazarlioglu, S.
    Gokce, H.
    Gurler, I.
    Salman, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401437.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.85.jf
    Opis:
    In the present study a commercially synthetic hydroxyapatite powders (CSHAp) were doped with lanthanum oxide (5 and 10 wt.% La₂O₃). The composite powders were well homogenized and pelleted in an uniaxial mould at 350 MPa. Pelleted green bodies were sintered at five different temperatures. Finally, the effect of La₂O₃ amount on the microstructural and mechanical properties of CSHA was investigated. Microstructural properties were detected by X-ray diffraction patterns (XRD) and scanning electron microscope (SEM). Mechanical properties of the sintered samples were determined by the density, hardness and compression strength measurements. Experimental results show that the mechanical properties of HA can be improved by the doping of La₂O₃
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1407-1409
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of travel behaviour in Petaling Jaya, Malaysia: an application of the theory of planned behaviour
    Autorzy:
    Madha, A.
    Salman, A. D.
    Hussain, H. D.
    Borhan, N.
    Riza Atiq, O. K. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/224282.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    public transport
    private car
    travellers
    Theory of Planned Behaviour
    TPB
    Structural Equation Modelling
    Petaling Jaya
    transport publiczny
    transport prywatny
    podróżni
    analiza zachowań
    Opis:
    In order to understand travellers’ willingness to use the train in Petaling Jaya, this study adds four predictors - situational factors, trust, novelty seeking and external influence - to the existing model of theory of planned behaviour (TPB). The study collected research data from employees in Petaling Jaya, Malaysia, resulting in valuable data of 400 participants. Results indicate that attitude, perceived behavioural control, and subjective norm are found to have positive effects on the behavioural intention of taking the train. Furthermore, novelty seeking and external influence also have positive influences on attitude. While the three antecedents of trust were found to have an indirect positive effect on commuters’ intention to take the train via attitude, subjective norm and PBC. Situational factors were found to have an indirect negative significant influence on people’s intention to take the train through perceived behavioural control.
    Źródło:
    Archives of Transport; 2016, 38, 2; 29-38
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical Characterization of Turbot (Psetta Maxima) Originated Natural Hydroxyapatite
    Autorzy:
    Inan, A.
    Komur, B.
    Ekren, N.
    Aydogdu, M.
    Gokce, H.
    Ficai, A.
    Salman, S.
    Oktar, F.
    Gunduz, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031973.pdf
    Data publikacji:
    2017-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.-t
    81.05.Mh
    87.85.J
    Opis:
    Nowadays hydroxyapatite is one of the most popular biomaterials, which is used in various medical and dental applications areas as graft material. Bovine bone is the biggest source for natural hydroxyapatite production, but its production can lead to very dangerous disease, like mad cow disease, without high degree calcination. Hydroxyapatite produced from marine sources is much safer and easier to produce than bovine hydroxyapatite. Here in this study natural hydroxyapatite and related phases were produced from a local source turbot (Psetta maxima). Beside the main bony internal structure, there are koshers (cycloid scale) on its skin. Koshers are bulky bumps, looking like flat, small and rounded structures. Internal bones and those bulky bumps were cleaned from flesh with chemicals and calcined at 850°C for 4 hours. After calcinations, especially those bulky bumps, were formed into mesoporous structures with very light bluish color. Those mesoporous structures can be used as natural mesoporous hydroxyapatite structures for bone grafting purposes. The internal bones have also formed hydroxyapatite. Scanning electron microscope and X-ray diffraction studies were performed. I this study it is found that the bones of turbot consist of hydroxyapatite and TCP related phases. The aim of this study is to produce natural hydroxyapatite structures from turbot scale with low carbon footprint, without harming the environment and without using complex chemicals.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 3; 397-399
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydroxyapatite Synthesis from Fish Bones: Atlantic Salmon (Salmon Salar)
    Autorzy:
    Komur, B.
    Altun, E.
    Aydogdu, M.
    Bilgiç, D.
    Gokce, H.
    Ekren, N.
    Salman, S.
    Inan, A.
    Oktar, F.
    Gunduz, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032056.pdf
    Data publikacji:
    2017-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.85.jj
    81.05.-t
    Opis:
    Production of the bioceramics on the market is presently conducted from typical precipitation method by using reagent grade raw chemicals or through calcination of natural sources like animal bones (especially bovine bone) and fish bones. Usually fish bones were damped near or in the water sources, which can lead to serious environmental pollution. Those were regarded as a trash, even though they still bear economic value, including conjugates. In this study bones of Atlantic Salmon (Salmo salar) were used as a bioceramic material source. Bones of Atlantic Salmon were collected from Besiktas Fish Market. Those were cleaned from possible flesh with reagent grade NaOH. Cleaned parts were washed with demineralized water very neatly. Dry fish bones were calcinated at 850°C for 4 hours. The obtained hydroxyapatite material was characterized with scanning electron microscopy and X-ray diffraction methods. It was found that the bioceramic material consisted of hydroxyapatite and various related phases. Scanning electron microscopy studies have revealed nano-structured bioceramic particles. The aim of this study is to obtain nano-structured bioceramics from bones of Atlantic Salmon in an environmentally friendly and economic way.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 3; 400-402
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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