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the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...
background: intensified strategy includes special attention to the symptoms such as cough (more than two weeks), fever (more than three weeks), night sweats (more than three weeks), and weight loss (more than 3 kg per month). if any of the above symptoms was positive, in suspected individuals for tb, more assessment should be done. the aim of this study was to compare between intensified and ro...
Introduction. It is known that under many conditions, effective operators will be partial recursive, ([MS], [KLS], [L]). On the other hand, certain pathological examples have been constructed by Friedberg [F] and Pour-El [P] to show that effective operators are not always partial recursive. Pour-El has observed that although it is well known that all partial recursive operators are continuous, ...
Dyslipidemia is the major risk factor for atherosclerotic cardiovascular diseases. A multitude of lipid guidelines exist, with several controversies, and the best approach in dyslipidemia management is not clear. The tools and lipoproteins used for risk assessment, whether to use a treatment target and implementing drugs other than statins are all controversial points. Until the time for the pu...
it is not possible to understand developments of a country’s culture and civilization without knowing his believes and myths. whether it is north or south, east or west, planes or mountains, sahara or deserts, here in iran every corner includes valuable and precious treasures which are known all over the world, and cultural – historical objects which are found here adorn all well known museums...
wireless sensor networks (wsns) are one of the most interesting consequences of innovations in different areas of technology including wireless and mobile communications, networking, and sensor design. these networks are considered as a class of wireless networks which are constructed by a set of sensors. a large number of applications have been proposed for wsns. besides having numerous applic...
ieter Bruegel el Viejo (Breda 1525-Bruselas 1569) es una figura apital de la pintura flamenca del siglo xvi cuyo genio se a equiparado a El Bosco. Especializado en paisajes poblados e campesinos, el pintor buscó la inspiración en el folclore, os refranes populares y los trabajos cotidianos, reflejando elmente la vida del pueblo flamenco. Aunque también reaizó obras religiosas, Bruegel es el pin...
2',3'-Dihydroxy-4,4'-dimethoxychalcone (1) and 2',3',4-trihydroxy-4'-methoxy-chalcone, two new chalcones, were isolated from propolis from El Salvador. The compounds showed significant antibacterial and antifungal activity and moderate toxicity to Artemia salina nauplii.
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