Öz
 Bu çalışmanın amacı dijital oyun bağımlılığının altında yatan temel psikolojik ihtiyaçları ve içsel motivasyonu oyuncu deneyimleri üzerinden ortaya koymaktır. Çalışmanın kuramsal çerçevesi Deci Ryan (2000) tarafından geliştirilen öz-belirleme teorisine dayanır. Ek olarak, Yee’nin (2006) motivasyonunun öğeleri olarak tanımladığı başarı, sosyal içe dalma/ gömülme kavramları ile Murray’ın...

High density ceramics of the system Bi1-xLaxFeO3, 0 ≤ x ≤ 0.15, have been prepared starting from nanoparticles obtained by mechanosynthesis. The ceramics have been sintered conventionally at 850oC and by spark plasma sintering (SPS). Sintering conditions have been optimized to obtain single phase ceramics, and the microstructure of the ceramics has been compared. Ceramics prepared conventionall...

Although prehistoric periods (especially Chalcolithic) on the western side of the Central Zagros Mountain are fairly known, the Songhor and Koliyaei Plains have not been sufficiently investigated by western  or  Iranian archaeologists. In the course of the recent investigationsduring the 2002 and 2009 field seasons, thirty three chalcolithic sites, of which nine sites  contain Dalma sherds, wer...

Personal prototyping: Ceramics-based 3D inkjet and laser printing technology offers customized tissue engineering, body parts and more Ceramics-based 3D inkjet and laser printing technology Ceramics-based 3D inkjet and laser printing technology Ceramics-based 3D inkjet and laser printing technology Ceramics-based 3D inkjet and laser printing technology offers customized tissue engineering, body...

This review introduces concepts and background from the ceramics engineering literature regarding metastable zirconia ceramics to establish a context for understanding current and emerging zirconia-based dental ceramics.

Issues concerning powder consolidation methods compatible with the colloidal approach and issues associated with other powder processing steps, viz., den-sification and microstructural control, are presented with regard to research directions leading to more reliable ceramics. 1. Introduction With their multiplicity of elemental combinations and crystal structures, ceramics exhibit unique prope...

This research was conducted in order to study the effect of ZnO nanoparticulate addition on the properties of 0.9 Pb(Mg1/3Nb2/3)O3-0.1PbTiO3 [PMNT] ceramics. The PMNT ceramics were prepared by a solid-state reaction. The ZnO nanoparticles were added into PMNT ceramics to form PMNT/xZnO (x = 0, 0.05, 0.1, 0.5, and 1.0 wt.%). The PMNT/xZnO ceramics were investigated in terms of phase, microstruct...

OBJECTIVES This study determined the two-body wear and toothbrushing wear parameters, including gloss and roughness measurements and additionally Martens hardness, of nine aesthetic CAD/CAM materials, one direct resin-based nanocomposite plus that of human enamel as a control group. MATERIALS AND METHODS Two-body wear was investigated in a computer-controlled chewing simulator (1.2 million lo...

Because calcium phosphate (Ca-P) ceramics have been used as bone substitutes, it is necessary to investigate what effects the ceramics have on osteoblast maturation. We prepared three types of Ca-P ceramics with different Ca-P ratios, i.e. hydroxyapatite (HA), beta-tricalcium phosphate (β-TCP), and biphasic calcium phosphate (BCP) ceramics with dense-smooth and porous structures. Comprehensive ...