نتایج جستجو برای: up survey
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a survey was set up to study the problem of g-6 _ pd deficiency in iran. the deficient subjects underwent a detailed haematological investigation, and their geneological tree was drawn and studied. a registry has been started to enable a follow_up of the deficients revealed by the survey. it is proposed to increase the size and scope of the survey gradual stages so that a statistical analysis o...
A combination Purivox Double-John carousel propane exploder and CO2 pop-up scarecrow operated in synchrony was evaluated in five ripening sunflower fields in 1981 and 1982, respectively, near Devils Lake and Westhope, North Dakota. In each field, this treatment was evaluated in an alternating off-on sequence of 5-day intervals for a period of 20 days. In 1981, devices were deployed at one unit ...
Aerial survey data from 198 1 to 1997 of an increasing harbor seal (Phoca vitulina concolor) population in Penobscot and Blue Hill bays, Maine, were used to evaluate spatial and temporal patterns of use of pupping sites by mother-pup pairs. Pupping sites refer to haul-out sites where pups were observed during surveys, and are assumed to be used consistently from birth to weaning. Sites with pup...
BACKGROUND Preoperative simulation warm-up has been shown to improve performance and reduce errors in novice and experienced surgeons, yet existing studies have only investigated conventional laparoscopy. We hypothesized that a brief virtual reality (VR) robotic warm-up would enhance robotic task performance and reduce errors. STUDY DESIGN In a 2-center randomized trial, 51 residents and expe...
The notion of $f$-derivations of UP-algebras is introduced, some useful examples are discussed, and related properties are investigated. Moreover, we show that the fixed set and the kernel of $f$-derivations are UP-subalgebras of UP-algebras,and also give examples to show that the two sets are not UP-ideals of UP-algebras in general.
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