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Wyświetlanie 1-15 z 21
Tytuł:
Study of Bending Strength and Numerical Modeling of Wooden and Plywood Frame Elements
Autorzy:
Akgul, T.
Apay, A.
Aydin, E.
Sumer, Y.
Powiązania:
https://bibliotekanauki.pl/articles/1192998.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81
Opis:
Modern Frame Systems have appeared by development of frame systems due to search for optimum cost and quality of construction, along with the increased number of multi-storey concrete construction today. Although the initial investment costs of the modern frame systems are high, there use has increased 50-100 times with respect to the traditional methods. With the modern frames, reduction or complete elimination of extra operations, such as cutting and sizing on site, have led to savings on workmanship and time. These systems aim at providing wide range of application in a short time by using minimum workmanship and, consequently, maximum number of application. This study explores, experimentally and numerically, the bending strength of wooden and plywood panels most frequently used for the construction today.
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 1414-1416
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monte Carlo calculations of low energy positrons in silicon
Autorzy:
Aydin, A.
Powiązania:
https://bibliotekanauki.pl/articles/148795.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Monte Carlo method
positron transmission
backscattering
angular distribution
energy distribution
Opis:
Theoretical data for positron scattering from a thin silicon film and semi-infinite silicon are presented as a function of incident and outgoing angles and energies. These theoretical data of the scattering processes of low energy positrons penetrating into silicon were performed by Monte Carlo simulation. The simulation is based on the use of different types of differential cross sections for individual elastic and inelastic scattering i) inelastic scattering; Gryzinski's excitation function to simulate the energy loss and Liljequist's model to calculate the inelastic scattering cross section, ii) elastic scattering; the screened Rutherford differential cross section with the spin-relativistic factor. In calculations on positron traversing matter, it is important to know the transmission through medium, their path lengths, and their energy and angular distribution through matter. The simulation results are well agreed with experiments.
Źródło:
Nukleonika; 2005, 50, 1; 37-42
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monte Carlo calculations of positron implantation profiles and backscattering probabilities in gold
Autorzy:
Aydin, A.
Powiązania:
https://bibliotekanauki.pl/articles/147555.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
backscattering
computer simulation
incoming angle
mean penetration depth
positron
Opis:
The transport of charged particles through matter is worth considering for various applications. In this work, backscattering probabilities and mean penetration depths were calculated from the implantation profiles for positrons of energies 1-75 keV entering normally at various angles into a semi-infinite gold target. The theoretical results of backscattering probability and mean penetration depth are compared with other published [1, 3, 4, 10, 11, 13]. Monte Carlo calculations and experimental results for the semi-infinite gold target. In general, good agreement is observed.
Źródło:
Nukleonika; 2001, 46, 3; 87-90
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monte Carlo study of medium-energy electron penetration in aluminium and silver
Autorzy:
Aydın, A.
Peker, A.
Powiązania:
https://bibliotekanauki.pl/articles/146550.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
angular distribution
electron
energy spectra
penetration
transmission
Opis:
Monte Carlo simulations are very useful for many physical processes. The transport of particles was simulated by Monte Carlo calculating the basic parameters such as probabilities of transmitted–reflected and angular-energy distributions after interaction with matter. Monte Carlo simulations of electron scattering based on the single scattering model were presented in the medium-energy region for aluminium and silver matters. Two basic equations are required the elastic scattering cross section and the energy loss. The Rutherford equation for the different screening parameters is investigated. This scattering model is accurate in the energy range from a few keV up to about 0.50 MeV. The reliability of the simulation method is analysed by comparing experimental data from transmission measurements.
Źródło:
Nukleonika; 2015, 60, 2; 361-366
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Walking behaviour and spatial use of broiler chickens
Autorzy:
Aydin, A.
Powiązania:
https://bibliotekanauki.pl/articles/11357.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
Modern broiler chickens are genetically selected for reaching higher weights in shorter life spans. In addition to this, they are raised in crowded housing conditions with less opportunity for movement. Understanding movement patterns, migration and use of space is essential in determining welfare of the birds in commercial farms. In this study, migration behaviour of broiler chickens in semi-commercial farms of 1800 chickens was studied. Observations were repeated in six growth periods each on 12 chickens once a day during their growth period of 42 days. It was seen that the activity of broilers was not decreasing during the growth period. Travelled distances of the chickens in total were not reduced in the last 3 weeks of their growth period (p > 0.05 in 89% of the observed birds, Mann-Whitney U test). Chickens preferred to be in the zones next to the wall farthest to the entrance of the house. The observed birds did not restrict themselves only around the feeders and the drinkers but used the whole surface area available during the whole growth period. The results of the study seem to be encouraging in achieving welfare of broiler chickens even in commercialised houses with high stocking density. Reported mobility of chickens is important for their survival and has therefore considerable impact on efficient production on farms.
Źródło:
International Letters of Natural Sciences; 2016, 54
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of pre-aeration on cyanide leaching of a non-refractory sulphide gold and silver ore
Autorzy:
Aydin, B.
Basturkcu, H.
Gul, A.
Powiązania:
https://bibliotekanauki.pl/articles/951867.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
nonrefractory sulphide gold–silver
cyanidation
lead nitrate
hydrogen peroxide
aeration
Opis:
The leaching behaviour of a sulphide gold-silver ore was investigated in terms of a relationship between gold and silver extractions and cyanide consumption. Ninity five Au % and 88.0% Ag extractions were obtained under the determined conditions of 24 h leaching duration, -74 μm particle size, 40% solids ratio, 4 g/dm3 NaCN concentration, and 450 rpm stirring speed with NaCN consumption of 3.35 g/dm3. Since the NaCN consumption was higher than in industrial applications, Pb(NO3)2 and H2O2 additions and aeration using an air pump were tested during leaching in order to decrease the consumption. While Pb(NO3)2 addition with aeration caused a decrease in the metal extractions, the individual or combined additions of H2O2 and aeration could not provide a reduction in the cyanide consumption. Therefore, the effect of the pre-aeration followed by cyanidation was tested. Eventually, applying 4 h of pre-aeration before a shorter leaching duration of 12 h provided 92.0% Au and 90.5% Ag extractions with a reduced NaCN consumption of 2.44 g/dm3.
Źródło:
Physicochemical Problems of Mineral Processing; 2015, 51, 2; 647-660
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Fuel Contamination to Marine Lubricant on Friction Behaviors between Piston Ring and Cylinder Liner
Autorzy:
Aydin, Z.
Savaş, Ö.
Parlak, A.
Keskin, İ.
Ünlügençoğlu, K.
Powiązania:
https://bibliotekanauki.pl/articles/1186930.pdf
Data publikacji:
2016-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.40.Pq
81.05.Bx
Opis:
In internal combustion engines, friction losses caused by piston ring and cylinder liner pair account for approximately 20% of total mechanical friction losses as reported in literature. A reduction in friction between piston ring and cylinder liner pair would therefore result in higher efficiency, lower fuel consumption and reduced emissions. In this study, the effects of different types of fuel which is contaminated to cylinder oil have been tested for investigating the friction behavior between piston ring and cylinder liners pair by a reciprocating tester depending on the load, revolution and temperature. The results showed that lubricant type and revolution have been found significant on friction behavior.
Źródło:
Acta Physica Polonica A; 2016, 129, 4; 617-620
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monte Carlo simulations of resistive plate chamber for 0.511 MeV photon with FLUKA
Autorzy:
Demir, N.
Aydın, A.
Powiązania:
https://bibliotekanauki.pl/articles/1070435.pdf
Data publikacji:
2016-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
29.40.Cs
29.40.Gx
05.10.Ln
Opis:
We report the simulation results of resistive plate chamber for 0.511 MeV photons using FLUKA code. The efficiency of resistive plate chamber is directly related to the number of electrons produced in the gas gap. Therefore, the type of converter materials and thickness are important parameters for resistive plate chamber detection performance. In this work, the FLUKA based simulations for parallel and isotropic photons were operated for detection efficiency by choosing different converter materials and thicknesses.
Źródło:
Acta Physica Polonica A; 2016, 130, 1; 466-468
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pollen morphology of Polygala L. (Polygalaceae) from Turkey and its taxonomic implications
Autorzy:
Donmez, E.O.
Aydin, Z.U.
Donmez, A.A.
Powiązania:
https://bibliotekanauki.pl/articles/31341324.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2023, 65, 2; 21-47
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pre-concentration and flotation of alunitic kaolin and its possible use in ceramic tile industry
Autorzy:
Ediz, N.
Tatar, I.
Aydin, A.
Powiązania:
https://bibliotekanauki.pl/articles/109656.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
alunitic kaolin
kaolin flotation
angobe
ceramic tiles
Opis:
The aim of this research was to remove sulphur and alunitic parts by the flotation method from alunitic kaolin obtained from the Balikesir-Sindirgi region of Turkey, which is not currently used by the ceramic industry because of its high sulphur content. In the process, mineral alunite was floated while kaolinite was depressed. The effect of pre-concentration on the flotation process was also investigated. Pre-concentration included several processes such as wetting, mechanical scrubbing, and screening for removal of fine alunite particles and colouring oxides from kaolin as well as screening after consecutive milling for the separation of hard minerals such as quartz from kaolin. After the pre-concentration and flotation processes, kaolin concentrate having a SO3 content of 0.48% was obtained with a sulphur removal efficiency of 88.55%, and this kaolin was coded as F4. Afterwards, the use of F4 kaolin in the ceramic industry was investigated. For this purpose, the F4 kaolin was used in angobe preparation, and the angobes prepared were used for the production of floor and wall tiles. The properties of the angobes were also compared to those of commercial floor and wall tile angobes from a ceramic factory. These tests indicated that the floor and wall tile angobes prepared by using F4 kaolin could be used as an alternative for the angobes currently used by the factory.
Źródło:
Physicochemical Problems of Mineral Processing; 2015, 51, 1; 213-231
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhanced Mechanical Performance of Aluminum Glass Fiber Reinforced Foam Material by Cu Modification
Autorzy:
Ertürk, A.
Aydin, I.
Powiązania:
https://bibliotekanauki.pl/articles/1033530.pdf
Data publikacji:
2017-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Bx
81.05.Rm
81.20.Ev
81.70.Bt
Opis:
Glass fiber-reinforced aluminum foam and its modified forms, using 1 and 3 wt.% of Cu, were produced by powder sintering process, using spherical carbamide particles as space holders. The foams with 40 and 60 vol.% porosity fractions were successfully produced after water leaching and sintering procedures. Compression test was performed on foam samples to compare both, the compressive properties and energy absorption behavior of them. The composite foam samples with Cu modification have shown a higher compressive strength than the parent material foam. The average plateau stress and energy absorption capacity of foams produced in this study, achieved via utilizing 3 wt.% Cu, were 7.06 MPa and 3.51 MJ/m³, respectively.
Źródło:
Acta Physica Polonica A; 2017, 131, 3; 470-473
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electrical Characterizations of Schottky Diodes οn ITO Modified by Aromatic SAMs
Autorzy:
Havare, A.
Okur, S.
Yagmurcukardes, N.
Can, M.
Aydin, H.
Seker, M.
Demic, S.
Powiązania:
https://bibliotekanauki.pl/articles/1400033.pdf
Data publikacji:
2013-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.20.Hb
73.20.Mf
73.21.-b
73.22.-f
73.25.+i
73.40.Ei
73.40.Jn
73.40.Ns
Opis:
In order to understand the electronic properties of the organic Schottky diode, ITO/TPD/Al and ITO/SAM/TPD/Al organic Schottky devices were fabricated to obtain current-voltage characteristics. From the slopes and y-axis intercepts of the plots, the values of the ideality factor, barrier heights of the ITO/SAM/TPD/Al diode were determined as 2.03 and 0.56 eV, respectively. The surface characterizations of modified and unmodified ITO were performed via atomic force microscopy.
Źródło:
Acta Physica Polonica A; 2013, 123, 2; 456-458
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of relationships, self-evaluation and self-esteem of women’s with histerectomy
Autorzy:
Ilknur, Aydin Avci
Birsen, A.
Busra, A.
Powiązania:
https://bibliotekanauki.pl/articles/1918397.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
hysterectomy
self-evaluation
self-esteem
Opis:
Purpose: To evaluate the marital relationships, the thoughts about femininity and sexual identity, and the self-evaluation and changes in the self-esteem of women having a hysterectomy operation, during the period of both before and after surgery. Material and methods: This study was designed according to the principles of the comparative descriptive research carried out between 15 January 2013 – 15 June 2014 at Ondokuz Mayis University, Faculty of Medicine Clinic of Obstetrics and Gynaecology. The power sample size was determined to be 72. The research included 88 contactable women who were admitted to the clinic at the time of the research, who had agreed to participate in the study, and who lived in the province where the research was conducted (as the final tests were done via home visits). A questionnaire form, the Coopersmith Self Esteem Scale, and the Social Comparison Scale were used in the collection of the data. Descriptive statistics and x2 and Paired t tests were used in the data analysis. Results: Changes in the self-esteem of women having a hysterectomy were examined before surgery, one week after surgery, and three months after surgery; while there weren’t any changes in self-esteem one week after surgery, a significant decrease in the women’s self-esteem was discovered three months after surgery (p<0.01). Conclusion: It was discovered that a change in self-evaluation and self-esteem occurs after hysterectomy surgery in women.
Źródło:
Progress in Health Sciences; 2016, 6(2); 7-13
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pollen morphology in the tribe Nigelleae (Ranunculaceae): a worldwide palynological investigation into the species
Autorzy:
Isik, S.
Donmez, E.O.
Aydin, Z.U.
Donmez, A.A.
Powiązania:
https://bibliotekanauki.pl/articles/2117898.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Garidella
Komaroffia
multivariate analysis
Nigella
Ranunculaceae
pollen morphology
Opis:
The pollen morphology of many collections of taxa of the tribe Nigelleae from the family Ranunculaceae which occur worldwide is presented in this study. A total of 88 specimens from 21 taxa, some of which were recently proposed, belonging to the genera Komaroffia, Garidella, and Nigella of Nigelleae were examined using light microscopy (LM) and scanning electron microscopy (SEM). In the tribe, the pollen type is mostly trizonocolpate, but in many taxa and specimens, both trizonocolpate and non-trizonocolpate types occur together. The pollen grains are small to medium (25–53.75 μm × 20–55 μm) in size and oblate to prolate in shape. The exine pattern at the mesocolpium in all the taxa investigated is similar: micro-echinate in LM and micro-echinate-punctate in SEM. The colpus membrane in Komaroffia and Nigella is micro-echinate in both LM and SEM. In Garidella, it is micro-echinate in LM but echinate (spinulose) in SEM. In this study, multivariate analyses, principal component analysis (PCA), and unweighted pair group method with arithmetic mean (UPGMA), were used to evaluate relationships between the genera and species within the tribe with respect to pollen morphology. PCA results show three main groups in the tribe: Garidella, Komaroffia, and Nigella. Moreover, the UPGMA tree also chiefly supports generic segregation into the smaller genera. An overall synthesis of the pollen characteristics of the three genera is provided and discussed.
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2019, 61, 1; 93-102
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Different Organic Gelating Agents on Grain Size of ZnO Nanoparticles
Autorzy:
Karaal, Ş.
Köse, H.
Aydin, A.
Akbulut, H.
Powiązania:
https://bibliotekanauki.pl/articles/1218769.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Fw
81.07.Bc
Opis:
In this work, sol-gel method was used in order to synthesize ZnO nanoparticles. $Zn(CH_3COO)_2$·$2H_2O$ was used to obtain ZnO precursor solution. To investigate the effect of organic gelating agents on grain size, various organic gelating agents such as triethanolamine (TEA), glycerin (GLY), ethylene glycol (EG), citric acid (CA) and tartaric acid (TA) were used. X-ray diffraction analysis was used for phase identification and grain size calculation. ZnO powders were characterized by using Fourier-transform infrared spectroscopy, scanning electron microscopy and atomic force microscopy.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 338-340
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 21

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