In forced-choice detection, incorrect responses are routinely ascribed to internal noise, because experienced psychophysical observers do not act as if they have a sensory threshold, below which all perceived intensities would be identical. To determine whether inexperienced observers have sensory thresholds, we examined psychometric functions (percent correct versus log contrast) for detection...

during the last several years, application of numerical weather prediction models in the country have become common in both research and operations, even though systematic verification of the models’ results using statistical methods has rarely been conducted (sodoudi et al. 2009). this paper aims at comparing the mm5 24-hour precipitation forecasts with the corresponding observations using sta...

The presence of people in urban spaces and related components is one of the most important issues in the field of behavioral sciences in urban studies. The mechanism of static presence in urban spaces is influenced by factors that generally determine the quality of social life in these spaces. The present study examines the way people are present in urban spaces in relation to each other, and i...

16 Objective: This study develops normalized values for sensation in the feet of healthy subjects. Knowledge relative to normal sensory perception and subsequent loss will enable clinicians to differentiate between normal and abnormal findings, especially in patients with or at risk for diabetes. Methods: Subjects were over age 18 and without medical complications that might compromise sensory ...

The purpose of this work is to compare the linear and non-linear kriging methods in the mineral resource estimation of the Qolqoleh gold deposit in Saqqez, NW Iran. Considering the fact that the gold distribution is positively skewed and has a significant difference with a normal curve, a geostatistical estimation is complicated in these cases. Linear kriging, as a resource estimation method, c...

rangeland ecosystems shift across dynamic thresholds between differentecological states in response to natural or human-induced factors. these differentecological states are the result of interactions among climate, soils, grazing history,and management practices. the notion of a single ‘‘pristine’’ final state is onlyconceptual in nature, and because of this, dynamic thresholds and the effects...

purpose: to determine hearing thresholds at sound frequencies important for speech comprehension in subjects with ocular pseudoexfoliation (pxf) and to compare them with that of controls without pxf. methods: eighty-three subjects with ocular pxf and 83 age and sex matched controls without pxf were enrolled in this case-control study. pure tone audiometry (bone conduction) was performed at 1, 2...

This study aims to evaluate the efficiency of the concentration-number (C-N) fractal model for discrimination of soil horizon regarding the depth distribution profile. In this regard, soil parameters such as pH, organic carbon content, calcareous mineral content, electrical conductivity and available phosphorus of Ziarat forestland in Golestan Province, north of Iran, has been investigated. The...