نتایج جستجو برای: initiation
تعداد نتایج: 96023 فیلتر نتایج به سال:
Detonation initiation by shock is an important issue in the explosive safety assessment and design of the explosive train and explosive devices. Experimental studies in this area are very difficult, expensive, and require advanced equipment. Therefore, simulation is a useful and suitable way for studying this phenomenon. The purpose of this article is to develop a one-dimensional computer code ...
An elastic finite element analysis was conducted to evaluate the stress distribution in the initiation zone of the adhesive rupture during the 3-point bending test. This test is used to measure the adherence between a polyepoxy adhesive and aluminum alloy with different surface treatments. The purpose is to compare, in the high stress concentration areas, the stress fields calculated using fini...
Present study deals with the prediction of crack initiation angle for mixed mode (I/II) fracture using finite element techniques and J-Integral based approach. The FE code ANSYS is used to estimate the stress intensity factor numerically. The estimated values of SIF were incorporated into six different crack initiation angle criteria to predict the crack initiation angle. Single edge crack spec...
Objectives: Drug injection carries with it many risks and therefore it is important to understand the initiating factors of injection and its origins. Thus, the purpose of this study was to identify factors associated with the initiation of injection drug use among substance abusers. Methods: Study method was a cross-sectional study. The research statistics universe constitutes a...
Due to production importance and potato minituber sleep, this research was carried out as factorial based on randomized complete blocks design with three replications at the Research Greenhouse of Ferdowsi University of Mashhad, Iran, in 2013. Treatments included foliar application of growth regulators at two physiological growth stages (stolen initiation and tuber initiation) and growth regula...
Introduction: Spinal anesthesia in opium-addicted patients can be associated with many complications. Hence, this study aimed to investigate sensory and motor block characteristics, duration of postoperative analgesia, hemodynamic and side effects by adding Fentanyl to bupivacaine in spinal Anesthesia of opium-addicted patients. Methods: In a double-blind randomized clinical trial, 60 American...
Background: Prolactin (PRL) appears to play a role in the pathogenesis of autoimmune diseases. Limited evidence showed an association between serum PRL levels and the activity of pemphigus vulgaris (PV). This study intends to determine PRL level changes in pemphigus patients during therapy and its correlation with disease type and severity. Methods: In this cohort study, we measured serum PRL l...
One of the most important issues when working with energetic materials is their initiation. Of the various methods of energetic materials initiation in the military and civilian industries, shock initiation is of particular importance. Numerical and simulation study of the shock initiation of condensed phase explosives is related to models called burning rate models, which describe the conversi...
Introduction: Breastfeeding is essential and a unique way of providing food to infants for development and healthy growth. Various breastfeeding practices are followed in different regions of India. Objective: This study aims to collect the information for practices related to prelacteal feed, early initiation of breastfeeding, exclusive breastfeeding, and weaning in India. Materials and Met...
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