نتایج جستجو برای: sbs
تعداد نتایج: 2255 فیلتر نتایج به سال:
Computer simulations of SBS modified bitumen and carbon nanotube/SBS were carried out to have research on the mechanism capacitating effect nanotubes SBS-modified bitumen. Through molecular dynamics simulation, binding energy (Ebinding), radial distribution function (g(r)) mixing (Emixing) composites analyzed according Velocity-Verlet algorithm, enhancement compatibility was quantified influenc...
بررسی اثر پراکندگی القایی بریلوئن و بهره بریلوئن در تقویت کننده های فیبری و تاثیر ضریب جذب بر روی آن
پراکندگی القایی بریلوئن یعنی sbs پدیده ای غیر خطی است. زمانی که یک فیبر تحت تاثیر یک پرتوی لیزر همدوس با توان بالا قرار می گیرد، بیشتر انرژی پرتوی لیزر به عقب بازمی گردد که به موج ایجاد شده موج استوکس می گویند. در این پایان نامه، اثرات sbs بر بهره تقویت کننده فیبری بریلوئن بررسی می شود. همچنین، تغییرات سیگنال استوکس بر حسب طول فیبر بررسی خواهد شد. با توجه به اینکه sbs بر عملکرد تقویت کننده های ...
Background and Aim: This study aimed to evaluate the effect of repeated bonding by self-etching primers (SEPs) and a conventional phosphoric acid-etchant on shear bond strength (SBS), adhesive remnant index (ARI), and enamel morphology at different debonding time points. Materials and Methods: In this experimental study, 120 premolars were randomly divided into six groups of 20. In the first t...
The medical profession in 1972 first described the shaken baby syndrome (SBS). Since then, SBS has been recognized as one of the most severe types of child maltreatment and is the most common cause of death in abused children. It refers to a form of severe head injury when a young child is shaken vigorously by a grown-up. The shaking produces a shearing force to the immature brain and tears the...
OBJECTIVE To determine whether there is an age-specific incidence of hospitalized cases of Shaken Baby Syndrome (SBS) that has similar properties to the previously reported "normal crying curve," as a form of indirect evidence that crying is an important stimulus for SBS. DESIGN AND SETTING The study analyzed cases of Shaken Baby Syndrome by age at hospitalization from hospital discharge data...
This paper discusses the laboratory design of continuously graded asphaltic concrete mixtures containing styrene butadiene styrene (SBS). The purpose of this study is to evaluate mechanical properties of control and SBS modified asphalt mixtures. Furthermore rheological properties of conventional and modified asphalt in different SBS content were studied. AC-10 was used as binder in the study. ...
Browning disorder, which usually occurs post-harvest in pears subjected to long-term storage, can cause browning of the pear flesh and/or core. In 2011, investigators in China found a novel type of brown spot (designated as surface brown spot, SBS) in pre-harvest 'Dangshansuli' pears (Pyrus bretschneideri Rehd.). SBS has a large impact on the exterior quality of the pears. Interestingly, the br...
OBJECTIVE We aimed to investigate the effects of silanation time on the shear bond strength (SBS) of metal brackets on gold alloy in a silicoating procedure and compare the SBS of metal brackets on gold alloy and enamel. METHODS Type III gold alloy plates were sandblasted with 30-µm silicon dioxide. Excess particles were removed with gentle air after silica coating, and silane was applied. Ma...
This study investigates whether indoor environmental quality (IEQ) influences allostatic load (AL) and whether AL can be a predictor for sick building syndrome (SBS). We also assessed and compared the associations between AL and SBS versus 8-hydroxydeoxyguanosine (8-OHdG) and SBS. A total of 115 office workers from 21 offices completed self-reported SBS questionnaires, and provided 11 biomarker...
PURPOSE To investigate the effect of non-thermal atmospheric pressure plasma (NTAPP) treatment on shear bond strength (SBS) between resin cement and colored zirconia made with metal chlorides. MATERIALS AND METHODS 60 zirconia specimens were divided into 3 groups using coloring liquid. Each group was divided again into 2 sub-groups using plasma treatment; the experimental group was treated wi...
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