نتایج جستجو برای: theoretical model

تعداد نتایج: 2310007  

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2007
Emily A Weiss Jennah K Kriebel Maria-Anita Rampi George M Whitesides

In this paper, we discuss the current state of organic and molecular-scale electronics, some experimental methods used to characterize charge transport through molecular junctions and some theoretical models (superexchange and barrier tunnelling models) used to explain experimental results. Junctions incorporating self-assembled monolayers of organic molecules - and, in particular, junctions wi...

Journal: :jundishapur journal of health sciences 0
marzieh araban social determinats of health research center, department of public health, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; social determinats of health research center, department of public health, school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran. tel: +98-6133738269, fax: +98-6113738269 nahid eskandari school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran amal saki malehi school of health, ahvaz jundishapur university of medical sciences, ahvaz, ir iran

conclusions given the importance of physical activity, and given that most women are at the pre-contemplation stage of the trans theoretical model, it seems necessary to devise educational interventional plans for the promotion of physical activities among women referred to health centers. patients and methods this was a cross-sectional study with 310 randomly selected females referred to healt...

Journal: :journal of research in health sciences 0
manoj sharma hannah priest catalano vinayak k. nahar vimala c. lingam paul johnson m allison ford

background: a substantial proportion of college students to not drink enough water and consume sugar-sweetened beverages (ssbs). consumption of ssbs is associated with weight gain, obesity, type 2 diabetes mellitus, dental carries, and increased risk for cardiovascular disease. hence, the purpose of this study was to use the multi-theory model (mtm) in predicting initiation and sustenance of pl...

Journal: :health education and health promotion 0
saghi moosavi instructor, department of nursing, faculty of nursing and midwifery, guilan university of medical science and health services, guilan, iran rabiollah farmanbar associate professor , department of health education and promotion, school of health, social determinants of health research center (schrc), guilan university of medical sciences, rasht, iran saghar fatemi md, health and environment research center, guilan university of medical science and health services, guilan, iran ebrahim ezzati larsari assistant professor, department of linguistics and foreign languages, payame noor university, tehran, iran mohamad ali yazdanipour b.sc., faculty of nursing and midwifery, guilan university of medical science and health services, guilan, iran abolhasan afkar assistant professor, school of health, social determinants of health research center (schrc), guilan university of medical sciences, rasht, iran

aim: regular physical activity has several physical, psychological and social benefits. however, it is a global health problem, especially among icu nurses. therefore, in order to improve nurses’ physical activity, it is required to determine the effective correlated factors. the aim of this study was to delineate predictive factors on the physical activity of icu nurses based on a trans-theore...

Journal: :علوم و تکنولوژی پلیمر 0
محمدرضا رستمی درونکلا محمدعلی سمسارزاده

the glass transition temperature of several pvac(1)-b-poly(ma-co-mma) (2) terpolymers with different fractions of methyl acrylate (ma) and methyl methacrylate (mma) repeating units in random copolymer (block 2) were calculated with barton, kwei and topological equations. the calculation was on the basis of the correlation between the fraction of repeating units in random copolymers and theoreti...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده برق و کامپیوتر 1392

abstract nowadaysphotovoltaic solar cells (pvs) areacknowledged the fastest growing energy technology in the word, however, they only account for only fraction of current global renewable energy capacity. it isrecognized that this incomplete market penetration has been largely a result of the technology’sexcessive cost. so researchers are trying to find innovative, economic way with theaim of ...

Journal: :international journal of pediatrics 0
sahar rostami student research committee, kurdistan university of medical sciences, sanandaj, iran. arezoo fallahi assistant professor, department of public health, school of health, kurdistan university of medical sciences, sanandaj, iran. tahereh pashaei assistant professor, department of public health, school of health, kurdistan university of medical sciences, sanandaj, iran. daem roshani assistant professor, department of public health, school of health, kurdistan university of medical sciences, sanandaj, iran. .

backgroundbody image is a determinant of individual attractiveness and physical activity among the young people. this study was aimed to assess the association of trans-theoretical model based exercise behavior change with body image evaluation among the female iranian students.materials and methodsthis cross-sectional study was conducted in sanandaj city, iran in 2016. using multistage samplin...

Journal: :archives of trauma research 0
hamid honarpisheh iranian medical science council's secretariat, deputy of education, ministry of health and medical education, tehran, ir iran; iranian medical science council’s secretariat, deputy of education, ministry of health and medical education, tehran, ir iran, tel: +98-2188063065, fax: +98-2188364228سازمان اصلی تایید شده: وزارت بهداشت درمان و آموزش پزشکی (ministry of health and medical education)

concomitant research and education are invaluable for patient care and medical practice in trauma. elucidation of a foundation for the integration of training and service that can be combined with research in trauma is crucial, and every trauma case should be studied for this purpose. in this study, we investigated the unique features of trauma research to formulate a generic comprehensive mode...

2015
Robin Gras Abbas Golestani Andrew P. Hendry Melania E. Cristescu William J. Etges

The forces promoting and constraining speciation are often studied in theoretical models because the process is hard to observe, replicate, and manipulate in real organisms. Most models analyzed to date include pre-defined functions influencing fitness, leaving open the question of how speciation might proceed without these built-in determinants. To consider the process of speciation without pr...

Journal: :Trends in ecology & evolution 1991
T P Young C K Augspurger

One of the more dramatic life histories in the natural world is that characterized by a single, massive, fatal reproductive episode ('semelparity'). A wealth of increasingly sophisticated theoretical models on differential life history evolution have been produced over the last two decades. In recent years, empirical studies of the ecology of semelparous plants (and their iteroparous relatives)...

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