Sampling is the common practice involved in academic and industry efforts on recommendation algorithm evaluation and selection. Experimental analysis often uses a subset of the entire useritem interaction data available in the operational recommender system, often derived by including all transactions associated with a subset of uniformly randomly selected users. Our paper formally studies the ...

b a ckground: the aim of the study was to evaluate and compare the efficiency and practicality of seven trappingmethods for adult phlebotominae sand flies. the results of this investigation provide information to determine the species composition and nocturnal activity pattern of different sand fly species. m e t hods: the study was carried out in both plain region (about 5km far from northeast...