The 1:1 structural order and B-site cation order in Pb(Mg1/3Nb2/3)O3 ceramics was significantly enhanced by Zr4+ substituting Nb5+ according to the chemical formula Pb(Mg1/ 3Zr2x/3Nb2(1−x)/3)O3−x/3. The enhanced structural and cation order was revealed by both X-ray diffraction and transmission electron microscopy. The increased charge difference and the introduced oxygen vacancies were suggest...

The sources of aggregate productivity growth are explored using detailed data for four-digit U.S. manufacturing industries during 1958-96 and a decomposition formula which allows to quantify the contribution of structural change. Labor productivity as well as total factor productivity are considered and the aggregation is performed with either value-added or employment shares. It is shown that ...

We present an algorithm for graph matching in a pattern recognition context. This algorithm deals with weighted graphs, based on new structural and topological node signatures. Using these signatures, we compute an optimum solution for node-to-node assignment with the Hungarian method and propose a distance formula to compute the distance between weighted graphs. The experiments demonstrate tha...

Protein structural class’s knowledge plays an important role in understanding the folding mode of protein. The prediction of protein structural classes as a transitional stage of the secondary structure of the protein to the tertiary structure is considered to be an important and challenging task. In this paper, PSI-BLAST profile is used to extract the evolutionary information of protein, and t...

An existing coupon compression fixture was modified for testing cylindrical coupon samples of a pultruded material in compression. Then a new fixture was developed for testing full-sized structural shapes, which presents all the advantages of the coupon fixture. Particularly, splitting of the end of the sample is prevented while reducing the stress concentration factor at the ends, yielding com...

in the present study, through the application of self-determination theory the impact of work climate and social network size on the volunteers motivation were investigated. research type of this study is applied and research method type is descriptive. in this study active volunteers of tehran red crescent society were selected as statistical population .concerning the population of studied ce...

the molecular geometry of complex of adenine with 8 water molecules was calculated with hartree-fock (hf). the standard 6-31g(d) basis set has been employed. the existence of c-h…o hydrogen bonds between the water molecules and the hydrophobic part of nucleobase is stablished. we optimized structures and computed interaction energies of all complexes of adenine with water molecules step by step...

the current study aims to identify and examine the effect of market orientation, management innovation and technological innovation on organizational performance. the current research was conducted using descriptive- correlational methodology. the population of the current research included pharmaceutical companies throughout the country. using simplerandom sampling method and cochran formula, ...

the aim of this study is assessing the effectiveness of customer relationship management factors in isfahan tourism and travel agencies by structural equation modeling (sem). it is practical according to the goal and it’s a kind of descriptive survey in terms of methodology. research population included all of staffs and managers at tourism and travel agencies in isfahan in 2012 that 274 of the...

the purpose of this paper is to analyze the willingness of clergymen towards their participation in agriculture and natural resources extension and education programs (anreep). the population of the study consisted of all the clergymen who dialed anreep. using coronbach alpha formula along with stratified random sampling techniques a number of 260 clergymen were selected. a questionnaire, desig...