Placing landmarks on number lines, such as marking each tenth on a 0-1 line with a hatch mark and the corresponding decimal, has been recommended as a useful tool for improving children's number sense. Four experiments indicated that some landmarks do have beneficial effects, others have harmful effects, and yet others have no effects on representations of common fractions (N/M). The effects of...

Abstract Groundwater is an essential source to supply water for various sectors. This paper aimed predict the quantitative and qualitative changes in groundwater over time evaluate efficiency of different modeling methods. study based on three steps. In first step, piezometers were clustered by Growing Neural Gas Network (GNG) method, central piezometer each cluster was used behalf cluster. sec...

Several corpora have been annotated with negation scope—the set of words whose meaning is negated by a cue like the word “not”—leading to the development of classifiers that detect negation scope with high accuracy. We show that for nearly all of these corpora, this high accuracy can be attributed to a single fact: they frequently annotate negation scope as a single span of text delimited by pu...

The crustacean order Isopoda (excluding Asellota, crustacean symbionts and freshwater taxa) comprise 3154 described marine species in 379 genera in 37 families according to the WoRMS catalogue. The history of taxonomic discovery over the last two centuries is reviewed. Although a well defined order with the Peracarida, their relationship to other orders is not yet resolved but systematics of th...

Background: Melasma is a pattern of facial pigmentation that affects upper lip, cheeks, forehead and chin. The disease is seen mainly in 30-55 year old women, and may be regarded as a physiological change in pregnancy. Its etiologic nature is still unknown. Objective: To determine the prevalence of melasma in women in Ardebil city. Patients and Methods: The study was cross sectional-descr...