the kalut-e-ashrafa area is located in the north-east of ardakan area in central iran, yazd province. this area promises copper mineralization. the most of the minerals in this study area are silica-rich veins and veinlets. therefore, in order to identify geological formations with silica zones and to determine potential mineralization areas, aster images and remote sensing methods were used. a...

Matched case-control study designs are commonly implemented in the field of public health. While matching is intended to eliminate confounding, the main potential benefit of matching in case-control studies is a gain in efficiency. Methods for analyzing matched case-control studies have focused on utilizing conditional logistic regression models that provide conditional and not causal estimates...

Objective(s): The nosocomial infections by Aspergillus species are associated with constructions and increased dust loads in hospital indoors. Our main object was to find the environmental sources of Aspergillus species causing hospital acquired infections. Materials and Methods: The clinical and environmental samplings were performed during 18 months from spring 2010 to summer 2011 in Imam ed...

background febrile seizures (fs) are the most common type of convulsion in young children. the predisposing factors are still under investigation; however, iron insufficiency might play a role in this regard. objectives our objective was to determine the association between iron status and febrile seizure. patients and methods this prospective case-control study was conducted among 109 children...

429 total variation classes, if the nominal rn; < < A, and for the band class, if m; < < A and mfi < < A. Then we have d h , = i T i 2 (t) A (t) dt. (22) To prove the first inequality in (22), we used the fact that the absolutely continuous part of a measure is no larger than the measure itself; to prove the second we used the fact that A is stochastically smallest under hi,, over all other ele...

A new family of codes is described that improve the reliability of digital communication over noisy, partial-response channels. The codes are intended for use on channels where the input alphabet size is limited. These channels arise in the context of digital data recording and certain data transmission applications. The codes-called matched-spectral-null codes -satisfy the property that the fr...

The effectiveness of small support spatial filters based on mean, median and morphological opening for the detection of scintillating ultra-dim stationary point targets in IR image sequences has been investigated. The effectiveness of two temporal filters was also studied. The filters were applied to two IR image sequences; an aircraft approaching in an uncluttered background, and an aircraft r...

In this paper we examine a technique to improve the performance of serial, matched-filter acquisition in directsequence spread-spectrum packet radio communications. Each packet transmission includes an acquisition preamble, and the preamble sequence is changed at the boundaries of predefined time epochs based on a pseudorandom sequence generator. The acquisition algorithm considered in this pap...