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Wyświetlanie 1-13 z 13
Tytuł:
Gamma Attenuation Properties of Some Aluminum Alloys
Autorzy:
Yıldırım, S.
Tugrul, A.
Buyuk, B.
Demir, E.
Powiązania:
https://bibliotekanauki.pl/articles/1188038.pdf
Data publikacji:
2016-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
25.20.Dc
Opis:
In the present work, several commonly used aluminum alloys were investigated for their protective properties against gamma radiation. The gamma transmission technique was used to study the gamma attenuation behavior of the alloys. Cs-137 (0.662 MeV) and Co-60 (1.25 MeV) gamma radioisotope sources, which have relatively medium and high gamma energy levels, were used as gamma sources. The linear and mass attenuation coefficients of the aluminum alloys were measured. The mass attenuation coefficients of the samples were compared with the theoretical values which were calculated using XCOM computer code. The difference between the experimental and theoretical values was below 5%. In addition half-value layer (HVL) values for the studied aluminum alloys were calculated using the linear attenuation coefficients. The attenuation coefficients of the different aluminum alloys were compared. The biggest HVL was observed for 1050 alloy, for both gamma isotope sources, which means the smallest gamma attenuation capability among the studied alloys. It is concluded that the alloys were applicable for the gamma radiation shielding applications.
Źródło:
Acta Physica Polonica A; 2016, 129, 4; 813-815
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Characterization of Gd₂O₂SO₄:Pr⁺³ Scintillation Material Produced by Sol-Gel Process for Digital Imaging System
Autorzy:
Aritman, I.
Yildirim, S.
Kisa, A.
Guleryuz, L.
Yurddaskal, M.
Dikici, T.
Celik, E.
Powiązania:
https://bibliotekanauki.pl/articles/1033327.pdf
Data publikacji:
2017-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.55.Hx
Opis:
Scintillation materials are widely used in digital X-ray imaging applications, radiotherapy applications coupled with suitable photoreceptors. Gd₂O₂SO₄ (GOS) scintillator doped with trivalent praseodymium (Pr⁺³) presented high X-ray absorption properties and good spectral compatibility which were utilized extensively for imaging system of X-ray microscopy, soft X-ray phosphor screen for water window. In this study, GOS:0.01Pr⁺³ scintillation material was synthesized by unique sol-gel process which was not previously applied and its characterization properties were investigated. Structure and luminescence properties of GOS:Pr⁺³ were optimized by utilizing X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and luminescence spectroscopy.
Źródło:
Acta Physica Polonica A; 2017, 131, 1; 106-108
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of pedal cyclists and pedestrian fatalities from total monthly accidents and registered private car numbers
Autorzy:
Ghasemlou, K.
Aydi, M. M.
Yildirim, M. S.
Powiązania:
https://bibliotekanauki.pl/articles/223654.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
traffic accidents
cyclist
pedestrians
artificial linear network
regression trees
multiple linear
wypadki drogowe
rowerzysta
piesi
Opis:
Accident prevention is relatively a complex issue considering the effectiveness of the injury prevention technologies as well as more detailed assessment of the complex interactions between the road condition, vehicle and human factor. For many years, highway agencies and vehicle manufacturers showed great efforts to reduce the injuries resulting from the vehicle crashes. Many researchers used a broad range of methods to evaluate the impact of several factors on traffic accidents and injuries. Recent developments lead up to capable for determining the effects of these factors. According to World Health Organization (WHO), cyclists and pedestrians comprise respectively 1.6% and 16.3% in traffic crash fatalities in 2013. Also in Turkey crash fatalities for pedestrian and cyclists are respectively 20.6% and 3% according to Turkish Statistical Instıtute data in 2013. The relationship between cycling and pedestrian rates and injury rates over time is also unknown. This paper aims to predict the crash severity with the traffic injury data of the Konya City in Turkey by implementing the Artificial Neural Networks (ANN), Regression Trees (RT) and Multiple Linear Regression modelling (MLRM) method.
Źródło:
Archives of Transport; 2015, 34, 2; 29-35
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation of synthetic carnallite and amorphous silica from chromite beneficiation plant tailings
Wytwarzanie syntetycznego karnalitu i amorficznej krzemionki z odpadów wzbogacania rud chromitowych
Autorzy:
Top, S.
Yildirim, M.
Powiązania:
https://bibliotekanauki.pl/articles/1849686.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
synthetic carnallite
amorphous silica
mineral processing
hydrometallurgical recovery
karnalit syntetyczny
krzemionka bezpostaciowa
wzbogacanie magnetyczne
odzysk hydrometalurgiczny
Opis:
In this paper, synthetic carnallite (MgCl2 ∙ KCl ∙ 6H2O) and amorphous silica (SiO2) preparation possibilities were investigated by utilizing chromite beneficiation plant tailings which contain 3.44% chromite (Cr2O3) and 30.55% magnesium oxide (MgO) by weight. Firstly, laboratory scale high intensity wet magnetic separator was applied for removing the magnetic materials such as chromite, iron (II ) and manganese (II ) minerals in the tailings. About 85.75% of chromite, 91.22% of MnO and 64.71% of Fe2O3 were removed by single stage magnetic separation. After the magnetic separation, hydrometallurgical recovery was initiated by leaching of the tailings with hydrochloric acid (HCl). Amorphous silica particles and the other solids were separated from the leach solution by filtration. Impurities were precipitated from the leach solution by elevating the solution pH via magnesiumhydroxide (Mg(OH )2) adding. The purified magnesium chloride (MgCl2) solution was mixed with potassium hydroxide (KOH ) at stoichiometric ratio. According to the XRD and chemical analysis, the synthetic carnallite was synthesized by controlled heating of this solution at 90–100°C. Also, the amorphous silica with 96.5% SiO2 content and 84.38% recovery yield was obtained by additional magnetic separation treatment.
W artykule przedstawiono badania możliwości wytwarzania karnalitu (MgCl2 • KCl• 6H2O) i bezpostaciowej krzemionki (SiO2) z odpadów z zakładów procesu wzbogacania chromitów, które zawierają 3,44% wag. chromitu (Cr2O3) i 30,55% wag. tlenku magnezu (MgO). W skali laboratoryjnej do usuwania materiałów magnetycznych, takich jak: chromit, żelazo (II) i minerały manganowe (II) zastosowano wzbogacanie mokre w separatorach magnetycznych o wysokiej intensywności. Około 85,75% chromitu, 91,22% MnO i 64,71% Fe2O3 usunięto metodą jednoetapowej separacji magnetycznej. Po wzbogacaniu magnetycznym odzysk hydrometalurgiczny został zainicjowany przez ługowanie odpadów kwasem chlorowodorowym (HCl). Amorficzne cząstki krzemionki i inne substancje stałe oddzielono od roztworu ługującego przez filtrację. Z roztworu ługowanego wytrąciły się zanieczyszczenia przez wzrost pH dzięki zawartemu wodorotlenkowi magnezu (Mg(OH)2). Oczyszczony roztwór chlorku magnezu (MgCl2) zmieszano z wodorotlenkiem potasu (KOH ) w stosunku stechiometrycznym. Zgodnie z XRD i analizą chemiczną, syntetyczny karnalit syntetyzowano przez kontrolowane ogrzewanie tego roztworu w temperaturze 90–100°C. Również odzysk 84,38% amorficznej krzemionki o zawartości 96,5% SiO2 uzyskano przez dodatkowe magnetyczne wzbogacanie.
Źródło:
Gospodarka Surowcami Mineralnymi; 2017, 33, 2; 5-23
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The mediating role of organizational support in the effect of transformational leadership on employee empowerment
Mediacyjna rola wsparcia organizacyjnego w działaniu transformacyjnego przywództwa w zakresie wzmocnienia pracowników
Autorzy:
Yildirim, F.
Naktiyok, S.
Powiązania:
https://bibliotekanauki.pl/articles/405342.pdf
Data publikacji:
2017
Wydawca:
Politechnika Częstochowska
Tematy:
organizational support
transformational leadership
employee empowerment
management
structural equation model
wsparcie organizacyjne
przywództwo transformacyjne
upodmiotowienie pracowników
zarządzanie
model równania strukturalnego
Opis:
The purpose of this study is to examine the effect of transformational leadership shown by managers and organizational support on employee empowerment. With this purpose, the study uses transformational leadership, organizational support, and employee empowerment variables and contributes to the field by adding organizational support as the mediator variable. Data collection was performed through surveys distributed to 350 employees and 191 surveys were collected. The data were analysed by structural equation model. It was found that transformational leadership and organizational support have positive effects on employee empowerment. Although organizational support plays a mediator role in the relationship between transformational leadership and employee empowerment, this role is not at a significant level.
Celem tego badania jest zbadanie wpływu przywództwa transformacyjnego wykazanego przez menedżerów i wsparcia organizacyjnego, na wzmocnienie pozycji pracowników. W tym celu badanie wykorzystuje transformacyjne przywództwo, wsparcie organizacyjne i zmienne uprawniające pracowników oraz przyczynia się do rozwoju tej dziedziny poprzez dodanie wsparcia organizacyjnego jako zmiennej mediatora. Zbieranie danych przeprowadzono za pomocą ankiet rozesłanych do 350 pracowników i zebrano 191 prawidłowo wypełnionych ankiet. Dane analizowano za pomocą modelu równania strukturalnego. Stwierdzono, że przywództwo transformacyjne i wsparcie organizacyjne mają pozytywny wpływ na wzmocnienie pozycji pracowników. Chociaż wsparcie organizacyjne odgrywa rolę mediatora w związku między transformacyjnym przywództwem a wzmacnianiem pracowników, rola ta nie jest znacząca.
Źródło:
Polish Journal of Management Studies; 2017, 16, 1; 292-303
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of "health promotion program" on health perception and healthy life style applied to a group of adolescent students
Autorzy:
Yıldırım, ÖÖ
Altın, A.
Şener, S.
Avci, İA
Powiązania:
https://bibliotekanauki.pl/articles/1918875.pdf
Data publikacji:
2019-08-26
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Adolescents
healthy lifestyle
health education
Opis:
Purpose: This study was carried out to evaluate the effect of health education on adolescents' healthy lifestyle and health perceptions given an adolescent group. Materials and methods: The study's universe constitutes a total of 234 students attending the 9th grade of a high school. The study was constructed according to the single-group pre-test, quasi-experimental research model, in the 9th class in a high school. Data collection form, Adolescent lifestyle scale(ALS) and health perception scale were applied to the adolescents as a pre-test during the first phase of the study. The adolescents who were below the median score of ALS were accepted as the risk group and taken to the experimental group. Adolescents in the experimental group received a 6-week "Health Promotion Program" and a final test was given to the adolescents at the end of the training sessions. Descriptive statistics, Paired-t-test, independent-, and correlation were used in the evaluation of the data. Results: ALS total score was 94.52±9.53 before adolescents' health promotion education and 104.05±15.4 after education. The relationship between them was statistically significant(p<0.05). It was determined that the health perception of adolescents included in the study decreased after post-training total scores compared to the pre-training scores and that this relationship was statistically significant(p<0.05). Conclusion: Public health nurses may be recommended to develop healthy lifestyle behaviours by raising healthy adolescents by providing more adolescent education through school health services.
Źródło:
Progress in Health Sciences; 2019, 1; 137-146
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sonochemical-assisted magnesium borate synthesis from different boron sources
Autorzy:
Yildirim, M.
Kipcak, A. S.
Derun, E. M.
Powiązania:
https://bibliotekanauki.pl/articles/949386.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
magnesium borate
sonochemistry
spectroscopic analysis
ultrasonification
XRD
Opis:
In this study, sonochemical-assisted magnesium borate synthesis is studied from different boron sources. Various reaction parameters are successfully applied by a simple and green method. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and Raman spectroscopies are used to characterize the synthesized magnesium borates on the other hand surface morphologies are investigated by using scanning electron microscope (SEM). The XRD analyses showed that the products were admontite [MgO(B2O3)3 . 7(H2O)] with JCPDS (Joint Committee on Powder Diffraction Standards) no. of 01-076-0540 and mcallisterite [Mg2(B6O7(OH)6)2 . 9(H2O)] with JCPDS no. of 01-070-1902. The results that found in the spectroscopic studies were in a good agreement with characteristic magnesium borate bands in both regions of infra-red and visible. According to SEM results, obtained borates were in micro and sub-micro scales. By the use of ultrasonication, reaction yields were found between 84.2 and 97.9%. As a result, it is concluded that the sonochemical approach is a practicable synthesis method to get high effi ciency and high crystallinity in the synthesis magnesium borate compounds.
Źródło:
Polish Journal of Chemical Technology; 2017, 19, 1; 81-88
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Activity of resveratrol on the influence of aflatoxin B1 on the testes of Sprague dawley rats
Autorzy:
Omur, A.D.
Yildirim, B.
Saglam, Y.S.
Comakli, S.
Ozkaraca, M.
Powiązania:
https://bibliotekanauki.pl/articles/2087503.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aflatoxin B1
rat
resveratrol
sperm
Źródło:
Polish Journal of Veterinary Sciences; 2019, 2; 313-320
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of simultaneous application of nitrogen and copper on yield and steroidal sapogenin production in Trigonella foenum graecum L.
Autorzy:
Shams, M.
Haghighi, B.
Yildirim, E.
Rabiei, V.
Ercisli, S.
Masiha, S.
Golchin, A.
Powiązania:
https://bibliotekanauki.pl/articles/11855202.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
Diosgenin (a steroidal saponin of fenugreek) has long been used as a raw substance for the manufacturing of steroid drugs. In order to evaluate the nutritional effect of different nitrogen (0, 50, 100, 150 and 200 kg ha-1) and copper (0, 10, 20 and 30 kg ha-1) doses on the diosgenin content, growth and yield of fenugreek (var. Ardestan), an experiment was carried out in a factorial arrangement based on complete randomized block design. The diosgenin content in the plant was monitored by a high performance liquid chromatography. Lower doses of copper increased yield, yield component and diosgenin content, but its higher level (30 kg ha-1) had negative effects on the plant yield. The simultaneous application of nitrogen and copper ameliorate the diosgenin production, yield and yield component. The result obtained from correlation and stepwise regression analysis showed that traits such as leaf area index, pods number per plant, and dry weight have significantly direct relation to diosgenin production levels in plants, while dry weight has the highest effect on diosgenin production compared to other traits. According the results, we also can conclude that nitrogen application can decrease copper toxicity in fenugreek in the contaminated soils.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2017, 16, 3; 3-11
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of family support and family conflict on treatment compliance in type 2 diabetes
Autorzy:
Hançerlioğlu, S.
Toygar, İ.
Çıray, N.
Polat, G.
Özbey, Y.
Yıldırım Şimşir, I.
Çetinkalp, Ş.
Powiązania:
https://bibliotekanauki.pl/articles/1918946.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Family support
family conflict
treatment compliance
type 2 diabetes
Opis:
Purpose: To evaluate the effect of family support and family conflict on treatment compliance of type 2 diabetes patients. Materials/Methods: The study was conducted in the endocrinology department of a university hospital. Data were collected from 174 individuals diagnosed with Type 2 DM. Patient Identification Form, Family Support and Conflict Scale in Type 2 Diabetes, and Patient Compliance Scale in Type 2 DM Treatment were used for data collection. Results: It was found that the increase in family support increased compliance with the treatment, and the increase in family conflict decreased the compliance to the treatment. A statistically significant difference was found between gender (p = 0.037), place of residence (p <0.001), income level (p <0.001) and compliance. A statistically significant difference was found between marital status (p <0.001) and family support. Conclusions: The increase in family support increases compliance to the treatment, the increase in family conflict decreases the compliance to the treatment.
Źródło:
Progress in Health Sciences; 2020, 10(2); 48-54
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of higher order Hamiltonian approach to nonlinear vibrating systems
Zastosowanie metody Hamiltona wyższego rzędu w zagadnieniu drgań układów nieliniowych
Autorzy:
Askari, H.
Nia, Z. S.
Yildirim, A.
Yazdi, M. K.
Khan, Y.
Powiązania:
https://bibliotekanauki.pl/articles/279297.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
higher order Hamiltonian approach
Duffing equation
analytical solutions
Opis:
The higher order Hamiltonian approach is utilized to elicit approximate solutions for two nonlinear oscillation systems. Frequency-amplitude relationships and the model of buc kling of a column and mass-spring system are scrutinized in this paper. First, second and third approximate solutions of examples are achieved, and the frequency responses of the systems are verified by exact numerical solutions. According to the numerical results, we can conclude that the Hamiltonian approach is an applicable method for solving the nonlinear equations, and the accuracy of this method in the second and third approximates is very high and reliable. The achieved results of this paper demonstrate that this method is powerful and uncomplicated for solving of sophisticated nonlinear problems.
W pracy przedstawiono zastosowanie metody Hamiltona wyższego rzędu do wyznaczania przybliżonych rozwiązań analitycznych dla dwóch nieliniowych układów drgających. Szczegółowej analizie poddano charakterystyki amplitudowo-częstościowe modelu ściskanej belki oraz dyskretnego układu sprężysto-inercyjnego. Otrzymano przybliżone rozwiązania pierwszego, drugiego i trzeciego rzędu, a odpowiedzi częstościowe układów porównano z dokładnymi rezultatami symulacji numerycznych. Na ich podstawie oceniono, że metoda Hamiltona jest stosowalna dla układów nieliniowych, a przybliżenia drugiego i trzeciego rzędu stanowią rozwiązania analityczne o wysokiej dokładności. Uzyskane w pracy wyniki przekonują, że zaproponowana metoda jest prostym i jednocześnie bardzo skutecznym narzędziem rozwiązywania nieliniowych problemów układów mechanicznych o dużym stopniu złożoności.
Źródło:
Journal of Theoretical and Applied Mechanics; 2013, 51, 2; 287-296
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of hip dysplasia on some biochemical parameters, oxidative stress factors and hematocrit levels in dogs
Autorzy:
Polat, E.
Han, M.C.
Kaya, E.
Yilmaz, S.
Kayapinar, S.D.
Coskun, S.
Yildirim, A.
Can, U.K.
Powiązania:
https://bibliotekanauki.pl/articles/2087150.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
alkaline phosphatase
hematocrit
hip dysplasia
creatine kinase
oxidative stress
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 4; 473-478
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Breaking of seed dormancy in Iris suaveolens Boiss. et Reuter under in vitro conditions
Autorzy:
Hajyzadeh, M.
Yildirim, M.U.
Mokhtarzadeh, S.
Sarihan, E.O.
Khawar, K.M.
Powiązania:
https://bibliotekanauki.pl/articles/12680343.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
Iris suaveolens
ornamental plant
seed dormancy
dormancy breaking
in vitro condition
Opis:
Iris species have great economic importance for their use in ornamental and pharmaceutical industry. Flora of Turkey reports about 43 local taxons of which 16 are endemic. Iris suaveolens Boiss. et Reuter is an endemic species with high seed dormancy and has high tolerance to cold and drought. This study focused on seed dormancy break of I. suaveolens under in vitro conditions. In the first experiment, the seeds were given stratification treatment on MS medium containing different concentrations of BAP with or without NAA. The 2nd experiment reports effects of alternative combinations of cold (at 4°C, 24 h dark) – warm (16 h light photoperiod) conditions on medium containing different concentrations of plant growth regulators on agar solidified MS medium. Both experiments showed about 8.33% seed germination against 64.5% seed viability as confirmed by tetrazolium test. All germinating seeds were abnormal and very weak. In the third experiment, 10 minutes acid scarified seeds cultured at 24°C in 16 h light photo period on MS medium achieved 60.0% germination. Similar treatment under cold + dark condition was inhibitory and failed to show identical results. This underlines the importance of acid scarification, photoperiod and warm treatments of I. suaveolens seeds to break seed dormancy. All germinated seeds showed normal growth and development under field conditions.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 4; 15-24
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-13 z 13

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