نتایج جستجو برای: a case study
تعداد نتایج: 14111980 فیلتر نتایج به سال:
one of the most important factors in study of project’s , is the study of environmental opportunities factors the permanent study of environmental opportunity factors . the study of permanent environmental changing and knowing golden threats’ cooperate with possible threats and at the result in structure forming and future skeleton of organization has a vital effects . the petrochemical industr...
this study investigated the functions, types and frequencies of code switching in the teachers and students discourse in elt classrooms. to this end, the participants of this study including two groups of teachers and students were selected. the first group of participants were two efl teachers teaching general english courses (at two different levels of proficiency) in an institutional program...
abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...
in chapter one we will describe definitions and preliminary results to provide the global context of our own results to be presented in detail in the subsequent chapters in chapter two we consider degree-one maps of the circle and we study their rotation set. our main result in this chapter says that if the map is topologically mixing then its rotation interval is nontrivial (that is, not reduc...
atrial dissociation is characterized by different types of p waves captured in an electrocardiogram, usually seen in critically ill or post-cardiac transplantation patients. our case demonstrates a 55-year-old man, presenting with chest pain (unstable angina) in the emergency department with transient double-p waves; representing the phenomenon. our case did not have any of the suggested causes...
background and objectives: multiple sclerosis (ms) is the most prevalent autoimmune disease of the central nervous system, and it has been suggested that nutrition might play a role in the etiology of ms. this study was aimed to evaluate the relationship between ms risk and intake of some macro- and micro-nutrients in tehran (iran). materials and methods: in this hospital based, case-control st...
background: lung cancer is considered as one of the most frequent cancers worldwide, and has been the cause of more than onemillion mortalities each year. exposure to tobacco smoke is the primary cause of most lung cancers, since it contains several thousandcompounds, including more than 50 known carcinogens. however, a small fraction of individuals who are exposed to tobacco smokedevelop lung ...
in the first part of this thesis we explored wetting and its dynamics for small droplets. first, we showed how a simple feature of water droplets on a surface, i.e. laplace pressure, can be exploited to build a micropump. we investigated capillary pumping in microchannels both experimentally and numerically. putting two droplets of different sizes at the in/outlet of a microchannel, will ge...
abstract cooperative learning refers to small groups of learners working together as a team to solve a problem, complete a task, or accomplish a common goal. in a cooperative environment one’s success is directly related to the success of other members because the focus on the individual shifts towards the group. to test the effectiveness of the method, using jigsaw technique, a study was cond...
introduction: job stress is one of the main characteristics of modern life which is increasing and has been recognized as an important risk factor of cardiovascular diseases. the present study was conducted to determine the association between job stress at work environment and cardiovascular diseases. materials and methods: a number of 300 persons including 150 cases and 150 controls were cons...
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