Sürdürülebilir Kalkınma Amaçları
Yayınlar
- BildiriYalnız künye2017Examination of absorption effects at the Compton to coherent scattering intensities X-rays using Fe-Ca and Fe-Ti binary compounds with WDXRF
Boydaş, Elif; Boydaş, Mustafa Gökalp; Allm, Bünyamin; Akdemir, A.O.; Ekinci, A.; Han, I.; Oztekin, A.; Set, E.; Dadasoglu, F.; Karagoz, K.
Matrix absorption effects have been examined with scattered X-rays by using WDXRF system for Fe-Ca and Fe-Ti binary compounds. Fe as analyte and elements which some of them the K absorption edge just below the characteristic K X-ray energies of the analyte (Fe) as matrix have been chosen. Pure and binary with Fe ratio ranging from 10% to 90% samples were prepared with these elements. These samples have been analyzed in WDXRF system. At the end of measurement, the coherent and Compton scattering X-rays data of Rh Kα X-rays from these samples have been obtained. Matrix absorption effects have been examined by calculating coherent / Compton scattered X-rays intensity ratio.
AtıfScopus3WoS2OpenAlex2
İncele - BildiriAçık Erişim2017Determination of K shell XRF parameters and K to L shell vacancy transfer probabilities of ferromagnetic 3d transition metals
Allm, Bünyamin; Uǧurlu, Mine; Han, Ibrahim; Demir, Lütfü; Akdemir, A.O.; Ekinci, A.; Han, I.; Oztekin, A.; Set, E.; Dadasoglu, F.
In this study, K shell X-ray fluorescence cross-sections (σKα, σKβ and σK), K shell fluorescence yields (ωK) and K to L shell vacancy transfer probabilities (ηKL) of ferromagnetic 3d transition metals (Fe, Co, Ni) were investigated to understand how the relationship between ferromagnetism and these values changes with atomic number by using energy dispersive X-ray fluorescence (EDXRF) technique. The all obtained experimental and theoretical results were comparatively given as a function of the atomic number. It was clearly observed that all of the investigated parameters depend on the atomic number and the ferromagnetism state of the atom.
AtıfScopus3WoS2OpenAlex5İncele - BildiriAçık Erişim2017The speed control of DC motor under the load condition using PI and PID controllers
Corapsiz, Muhammed Reşit; Kahveci, Hakan; Akdemir, A.O.; Ekinci, A.; Han, I.; Oztekin, A.; Set, E.; Dadasoglu, F.; Karagoz, K.
In this study, it was aimed to compare PI (Proportional-Integral) and PID (Proportional-Integral-Derivative) controllers for speed control of Permanent Magnet Direct Current (PMDC) motor under both load and without load. For this purpose, firstly, the mathematical model was obtained from the dynamic equations of the PMDC motor and the obtained mathematical model was transferred to the simulation environment and modeled using Matlab/SIMULINK. Following the modeling process, PI and PID controller structures were formed, respectively. Secondly, after these structures were formed, the PMDC motor was run without any controller. Then, the control of the PMDC motor with no load was provided by using PI and PID controllers. Finally, the PMDC motor were loaded under the constant load (TL = 3 N.m.) for each condition and selected time period (t = 3 s). The obtained result for each control operations was comparatively given by observing effects of loading process on systems. When the obtained results were evaluated for each condition, it was observed that PID controller have the best performance with respect to PI controller.
AtıfScopus3OpenAlex4İncele - BildiriYalnız künye2017Antiproliferative and apoptotic effects of diffractaic acid in A549 and AGS cancer cells
Klzll, Hamit Emre; Aǧar, Güleray; Akdemir, A.O.; Ekinci, A.; Han, I.; Oztekin, A.; Set, E.; Dadasoglu, F.; Karagoz, K.
In this study, we determined the antiproliferative and apoptotic effects of diffractaic acid by measuring the gene expression changes of topo II α, caspase-3 and p53 on A549 and AGS cancer cells. Real time PCR assay was used to measure the change folds. It was determined that concentrations of 12,5, 50 and 100μg / ml were antiproliferative and apoptotic for the A549 cancer cell line and 50μg / ml for the AGS cell line.
AtıfScopus2WoS1OpenAlex2İncele - BildiriYalnız künye2017Buildup factors and kerma for Al2O3 and SiO2 in the energy range 0.015-15MeV
Yllmaz, Demet; Allm, Bünyamin; Akkuş, Tuba; Güzeldir, Betül; Akdemir, A.O.; Ekinci, A.; Han, I.; Oztekin, A.; Set, E.; Dadasoglu, F.
The energy absorption buildup factors (EABF) have been calculated for some thermoluminescent dosimetric materials (Al2O3 and SiO2) in the energy region 0.015-15MeV up to the penetration depth of 40 mean free paths (mfp). Also, kerma relative to air has been determined for these materials. It is observed that the energy absorption buildup factors and kerma relative to air depend on the photon energy and chemical content. Also, the energy absorption build up factors are found the highest in intermediate energy whereas the lowest in low- as well as high energies.
AtıfScopus1WoS1OpenAlex1İncele