Photoelectrochemical studies on the mixed oxides, A6Nb8Ti2O30 (A = Ba, Sr)

reflections on taught courses of the iranian ma program in english translation: a mixed-methods study

the issue of curriculum and syllabus evaluation and revision has been in center of attention right from when curriculum came into attention of educational institutions. thus everywhere in the world in educational institutions curricula and syllabi are evaluated and revised based on the goals, the needs, existing content, etc.. in iran any curriculum is designed in a committee of specialists and...

on the status of mixed methods research in applied linguistics

چکیده ندارد.

A Fluctuating State in the Framework Compounds (Ba,Sr)Al2O4

The structural fluctuation in hexagonal Ba(1-x)Sr(x)Al2O4 with a corner-sharing AlO4 tetrahedral network was characterized at various temperatures using transmission electron microscopy experiments. For x ≤ 0.05, soft modes of q ~ (1/2, 1/2, 0) and equivalent wave vectors condense at a transition temperature (TC) and form a superstructure with a cell volume of 2a × 2b × c. However, TC is largel...

EXAFS Studies of Ruthenium Based Double Perovskite ALaMnRuO6 (A = Ca, Sr, Ba)

Room and liquid nitrogen temperatures Mn K-edge extended X-ray fine structure (EXAFS) studies were carried out on powder samples of ALaMnRuO6 (A = Ca, Sr, Ba) perovskites. The EXAFS analysis of Mn K-edge spectra showed MnO6 octahedra are distorted. Among the three perovskites, the polyhedral distortion is highest for SrLaMnRuO6 ( = 1.4 × 10). For CaLaMnRuO6 ( = 0.5 × 10) and BaLaMnRuO6, ( = ...

(Ba, Sr)TiO3 for Multi-Gigabit DRAM