فهرست مطالب mehdi nori

Camouflage، in visual and near infrared region (NIR)، is one of the important topics developed for military purposes. In order to impart camouflage in NIR region، the reflectance profile of the object and its surrounding should be matched. So، the reflectance profile of a selected dye in NIR region is of great importance. If the fabrics are dyed with various pigments and then examined for their power of imparting camouflage in NIR region there would be much waste of human effort and cost to use a reflectance spectrophotometer. To challenge these problems، a new method is developed and reported in this study. For this purpose، a UV-Vis absorbance spectrophotometer is employed and the transmittance profiles of the selected dyes are compared with a known NIR camouflage imparting dye. The novel dye has been studied and evaluated for its potentials as camouflage substance. Since C. I. Vat Blue 13 is one of the camouflage dyes and because structural properties of the dye such as the transmittance curve or the reflectance curve are influenced by its structure، it was concluded that C. I. Vat Blue 6 dye can be used as a camouflage dye in NIR region by similarity of its transmittance curve with that of C. I. Vat Blue 13.

The purpose of this investigation is to determine auditory neuropathy in the students with severe to profound hearing losses in Ahwaz. In this cross-sectional study, 212 children of 7-11 year old with severe to profound hearing loss performed ordinary audiometric evaluations as well as ABR and OAE. The patients with normal DPOAE who had no record of acoustic reflex having normal ABR, were considered as the patients with auditory neuropathy. The neuropathic complication found in 14 children was appeared in 8 ones as one-sided (57.14%) and in 6 ones (42.86%) as two-sided. 68% of the patients as diagnosed had a very low Speech Discrimination Score (SDS). we must be very vigilant in auditory neuropathy diagnosis for the purpose to be successful in appropriate treatment of severe to profound hearing losses.