نتایج جستجو برای: phase iii isaac study
تعداد نتایج: 4565268 فیلتر نتایج به سال:
a significant problem in multicarrier communication systems is the necessity to reduce the value of papr (peak-to-average power ratio) of transmitting signal. in this thesis we study the effect of the system parameters such as coding and modulation types on papr and ultimate ber in a mc-cdma system. in this study we consider fading channel as well as the nonlinearity of transmitter’s amplifier ...
BACKGROUND The association between birthweight and asthma, eczema and rhinoconjunctivitisis conflicting. AIMS To examine the association between birthweight and symptoms of asthma, eczema and rhinoconjunctivitis. METHODS Parents or guardians of children aged 6–7 yr completed written questionnaires about symptoms of asthma, rhinoconjunctivitis and eczema, and several risk factors, including ...
BACKGROUND As Korea has experienced rapid economic development, the lifestyles of Koreans have become more Westernized, in terms of urbanization and dietary habits. Also, the prevalences of allergic diseases, such as rhinitis, asthma, and dermatitis, have increased rapidly. This study aimed to identify the factors influencing the symptoms of rhinitis conditions, including rhinitis, allergic rhi...
OBJECTIVES To estimate the prevalence of asthma and allergic diseases in 13- and 14-year-old schoolchildren and to compare it with previous phase I data. SUBJECTS AND METHODS A survey of 2,922 third and fourth grade students from randomly selected intermediate level schools across Kuwait was conducted. Supervised, self-administered, written and video questionnaires of the International Study ...
introduction: international study on asthma was conducted to study the prevalence of asthma symptoms among 13-14 year old children using written and video questionnaires during the early 90's. the aim of the present study (isaac) was to evaluate the agreement between the two questionnaires which were self-completed by the children. methods: this study, which was a part of the third phase o...
The prevalence of allergic diseases in childhood has increased significantly over the last decades. This increase seems to be closely associated with the way of life of western societies. The high prevalence differences on different regions may be due to linguistic and cultural reasons and not to real variations in prevalence. This is the reason why several authors felt the need to perform an o...
BACKGROUND Considerable variation in the prevalence of childhood asthma and its symptoms (wheezing) has been observed in previous studies and there is evidence that the prevalence has been increasing over time. METHODS We have systematically reviewed the reported prevalence and time trends of wheezing symptoms among children, worldwide and within the same country over time. All studies compri...
like any other learning activity, translation is a problem solving activity which involves executing parallel cognitive processes. the ability to think about these higher processes, plan, organize, monitor and evaluate the most influential executive cognitive processes is what flavell (1975) called “metacognition” which encompasses raising awareness of mental processes as well as using effectiv...
Introduction: International study on asthma was conducted to study the prevalence of Asthma symptoms among 13-14 year old children using written and video questionnaires during the early 90's. The aim of the present study (ISAAC) was to evaluate the agreement between the two questionnaires which were self-completed by the children. Methods: This study, which was a part of the third phase of In...
monumental changes occurring on a daily basis have altered the world into a global village of expanding technology and shrinking geography in which preparing language learners for intercultural communication seems to be a sine qua non for modern language education. employing a cross-sectional design in its first phase, this study investigated the intercultural sensitivity and language proficien...
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