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Now showing items 1-20 of 92

A New Estimation Technique for AR(1) Model with Long-Tailed Symmetric Innovations

Dener Akkaya, Ayşen; Türker Bayrak, Özlem (Springer, 2018)

In recent years, it is seen in many time series applications that innovations are non-normal. In this situation, it is known that the least squares (LS) estimators are neither efficient nor robust and maximum likelihood ...
A New Estimation Technique for AR(1) Model with Long-Tailed Symmetric Innovations

Dener Akkaya, Ayşen; Türker Bayrak, Özlem (2017)

In recent years, it is seen in many time series applications that innovations are non-normal. In this situation, it is known that the least squares (LS) estimators are neither efficient nor robust and maximum likelihood ...
A phenomenological study on ferroelastic KH3(SeO3)(2) and KD3(SeO3)(2)

Kiracı, Ali (2021-11)

The anomalous behavior of the Brillouin frequency shift omega of the soft acoustic mode for KH3(SeO3)(2) and KD3(SeO3)(2), and also the volume thermal expansion proportional to(V) and the specific heat C of KH3(SeO3)(2) ...
A phenomenological study on ferroelectric pyridinium tetrafluoroborate (C5NH6) BF4

Kiracı, Ali (Elsevier, 2019-10)

The temperature dependence of the specific heat C-V of (C5NH6)BF4 was analyzed according to a power law formula with a critical exponent alpha deduced from the compressible Ising model in the vicinity of the phase transition ...
A phenomenological study on ferroelectric β-glycine

Kiracı, A (2021)

The anomalous behavior of the specific heat for (Formula presented.) -glycine was analyzed in terms of the compressible Ising model approximately 5 K below and above the ferrelectric-paraelectric phase transition temperature ...
A sign of the past: Aliye berger

Okur Tolun, Elif (2015)

Aliye Berger , who has a privileged place in The Turkish Painting Art , stayed away from the generation clash of her time and various groupings. She was an artist who had an aim to acquire a place in art community. Her ...
A Study On How to Equip Students With Scientific Communication Skills

Menzi Çetin, Nihal; Akkoyunlu, Buket (Springer Verlag, 2018)

The purpose of this study was to investigate the effects of scientific communication (SC) curriculum on blog writing skills of sixth-grade students, and opinions of the students and teachers about the curriculum. Through ...
A Theoretical Investigation: Effect of Structural Modifications on Molecular, Electronic, and Optical Properties of Phosphonate Substituted BODIPY Dyes

Tasgin, Dilek Isik; Sirin, Pınar Seyitdanlioglu (2021-05-20)

Phosphonates are important organophosphorus compounds which exhibit versatile properties in organic chemistry, medicinal chemistry, materials and biological applications. Phosphonate groups have appeared in a very few ...
A Thermodynamic Study On Pbzr0.52Ti0.48O3 Ceramic Close to the Tetragonal-Cubic Transition

Kiracı, Ali (Springer, 2020-05-01)

The isobaric Grüneisen parameter and the wavenumber (frequency) of various Raman modes in PbZr1-xTixO3 (PZT x = 0.48) ceramic were calculated by means of the unit cell volume of this crystal. In addition, the damping ...
Adaptation of the Student Expectations of Online Learning Survey Revised (SEOLS-R) into Turkish

Arslan, Ömer; Dağhan, Gökhan; Akkoyunlu, Buket (2020)

The aim of this study is to adapt the Student Expectations of Online Learning Survey Revised [SEOLS-R] developed by Harris, Larrier and Castano-Bishop (2011) into Turkish. For this purpose, the adaptation process of the ...
Adaptive Estimation of Autoregressive Models Under Long-Tailed Symmetric Distribution

Yengür, Begüm; Bayrak, Özlem Türker; Dener Akkaya, Ayşen (Association for Computing Machinery, 2019-07-08)

In this paper, we consider the autoregressive models where the error term is non-normal; specifically belongs to a long-tailed symmetric distribution family since it is more relevant in practice than the normal distribution. ...
An Investigation of the Digital Footprint Awareness and Experiences of Secondary School Students

Yılmaz Soylu, Meryem; Demiröz, Seva; Akkoyunlu, Buket (2021-04)

The aim of this study is to examine the digital footprint awareness of middle school students according to grade level, gender, time spent on electronic devices and media. First of all, the digital footprint scale developed ...
Analysis and mathematical computation of some dynamic function for strontium stannate

Aşkun, Ali Rıza (2021)

The frequency and full width at half maximum (FWHM) data of the Ag Raman modes (95.4, 231.4 and 263.2 cm−1) in strontium stannate crystal have been analyzed using the Balkanski model and the fitting parameters were determined. ...
Analysis and mathematical computation of some dynamic functions for the guanidine zinc sulfate

Aşkun, A.R.; Kiraci, A. (2021)

A power-law formula with a critical exponent (Formula presented.) was used to analyze the anomalous behavior of the specific heat for guanidine zinc sulfate (GZS) crystal close to the phase transition temperature of TC = ...
Analysis of the specific heat and the free energy and calculation of the entropy and the internal energy of [N(CH3)(4)](2)MnBr4 close to the phase transition

Kiracı, Ali (2021-10-26)

The critical behavior of the specific heat and the Gibbs free energy of [N(CH3)(4)](2)MnBr4 was analyzed using the 'sing model close to the phase transition temperature of T-c = 276.5 K. Obtained value of alpha=0.02 from ...
Analysis of the Specific Heat and the Free Energy of [N(Ch 3 ) 4 ] 2 Znbr 4 Close to the Ferro-Paraelastic Phase Transition

Kiracı, Ali (Taylor&Francis LTD, 2019-02-04)

A power-law formula deduced from the Ising model was used to analyze the temperature dependence of the specific heat C p and the Gibbs free energy G of [N(CH 3 ) 4 ] 2 ZnBr 4 compound in the vicinity of the phase transition ...
Analysis of the specific heat and the free energy of [N(CH3)(4)](2)ZnBr4 close to the ferro-paraelastic phase transition

Kiracı, Ali (Taylor&Francis LTD, 2019-03-04)

A power-law formula deduced from the Ising model was used to analyze the temperature dependence of the specific heat and the Gibbs free energy of [N(CH3)(4)](2)ZnBr4 compound in the vicinity of the phase transition temperature ...
Analysis of the specific heat and the free energy of [N(CH3)(4)](2)ZnBr4 close to the ferro-paraelastic phase transition

Kiracı, Ali (2019-03-04)

A power-law formula deduced from the Ising model was used to analyze the temperature dependence of the specific heat and the Gibbs free energy of [N(CH3)(4)](2)ZnBr4 compound in the vicinity of the phase transition temperature ...
Assessment of the Use of AutoCAD in Mechanical Engineering Technical Drawing Education

Akyürek, Turgut (2017)

: AutoCAD is one of the widely used software tools in engineering education. In this study, a general assessment of AutoCAD for the usage in the mechanical engineering technical drawing education is made. AutoCAD is ...
Calculation of the frequency shifts and damping constant for the Raman modes (A(1g), B-1) near the tetragonal-cubic transition in SrTiO3

Kiracı, Ali; Yurtseven, Hasan Hamit (Scientific Technical Research Council Turkey-Tubitak, 2017-01)

Raman shifts of the soft mode A(1g) and the B-1 mode are calculated at various pressures at room temperature for the cubic-tetragonal transition (P-c = 9.5 GPa) in SrTiO3. This calculation is performed using the observed ...

Now showing items 1-20 of 92

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