نتایج جستجو برای: mask
تعداد نتایج: 22192 فیلتر نتایج به سال:
the technique of applying mask is one of the most important techniques in arabic contemporary poetry in which the ancient characters would be recalled by mentioned technique in order to express the desired concepts. this literary technique plays an important role in egyptian modernism contemporary poetry. thus the present research intends to survey the lexical and expressional meaning of mask a...
Background and Aim: Bioaerosols are one of the most important agents that cause post operating infections in hospitals. Surgical masks are recommended for prevention of bioaerosols transmition in operating rooms. This study aimed at evaluation of submicron particle filtration efficiency of domestic and imported surgical masks. Materials and Methods: In this cross sectional study, 5 types of...
Cephalometric evaluation of patients with Class III malocclusion after face mask therapy in mixed dentition period Dr. MS. A Akhoundi * - Dr. A. Khorshidian ** * Associate Professor of Orthodontics Dept., Faculty of Dentistry and Dental Research Center, Tehran University of Medical Sciences. ** Dentist. Abstract Background and Aim: Among different treatment options for patients with Class III m...
Commercially available nasal masks have a large mask volume and give rise to considerable air leaks around the mask during nasal intermittent positive pressure ventilation (NIPPV) which may reduce alveolar ventilation (VA per breath). The effects of a custom-fabricated nasal mask (F-mask) versus a commercially available mask (C-mask) on arterial blood gas measurements, dead space including both...
Change detection from satellite images based on optimal asymmetric thresholding the difference image
As a process to detect changes in land cover by using multi-temporal satellite images, change detection is one of the practical subjects in field of remote sensing. Any progress on this issue increase the accuracy of results as well as facilitating and accelerating the analysis of multi-temporal data and reducing the cost of producing geospatial information. In this study, an unsupervised chang...
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