نتایج جستجو برای: excavation damaged zone edz
تعداد نتایج: 145563 فیلتر نتایج به سال:
Nacrtak Forest roads provide access for people to study, enjoy or contemplate natural ecosystems. Therefore, roads are one of the most important tools needed in forestry. Forest roads are built by excavation of soil and rock. Rockfall occurs during construction works, caused by excavated rock pieces on embankment slopes and by blasting of block rock masses. This study analyzes rockfall damage t...
limitations in the design method used for the support systems of urban buildings make them vulnerable to damage by adjacent excavations. this paper examines a traditional system used to support excavation sites and adjacent buildings in which inclined struts are connected to the wall or foundation of the adjacent building. this method can be considered to be a type of shoring or underpinning. t...
BACKGROUND Caries excavation is a noninvasive technique of caries removal with maximum preservation of healthy tooth structure. AIM To compare the efficacy of three different caries excavation techniques in reducing the count of cariogenic flora. MATERIALS AND METHODS Sixty healthy primary molars were selected from 26 healthy children with occlusal carious lesions without pulpal involvement...
Automation of excavation work calls for a robotic system able to perform the planned digging work, and responsive to interaction forces experienced during excavation. The development of automated excavation control method requires a dynamic model to describe the evolution of the excavator motion with time. The joint torques of the boom mechanism are generated by hydraulic rams which also affect...
برداشت های ژئوفیزیکی به روش های توموگرافی مقاومت ویژه ی الکتریکی، پلاریزاسیون القایی ( ip) و پلاریزاسیون القایی طیفی ( sip) بر روی دو پروفیل در داخل یکی از تونل هایی که در سازند رسی حفر شده است، انجام شده است. یکی از پروفیل ها خطی در کف تونل و دیگری بر روی کف و دیواره ی تونل (پروفیل کمانی شکل) برداشت شده است. ما در این پژوهش به تفسیر داده های به دست آمده بر روی این دو پروفیل می پردازیم. هدف از ...
B cells undergo rapid cell division and affinity maturation in anatomically distinct sites in lymphoid organs called germinal centers (GCs). Homeostasis is maintained in part by B cell apoptosis. However, the precise contribution of apoptosis to GC biology and selection is not well defined. We developed apoptosis-indicator mice and used them to visualize, purify, and characterize dying GC B cel...
Acetaminophen (APAP) overdose is the most frequent cause of acute liver failure in the US and many western countries. It is well known that APAP induces mitochondrial damage to trigger centrilobular necrosis. Emerging evidence suggests that autophagic removal of damaged mitochondria may protect against APAP-induced liver injury. Electron and confocal microscopy analysis of liver tissues reveale...
Original scientific paper In order to obtain the skewed pressure characteristics, the physical model tests, adopting two kinds of excavation sequences of the bench method and the expanding method, were conducted under the different confining pressures for observation thermal radiation characteristics of the skewed pressure induced by step-by-step excavation for a double-arch tunnel. Firstly, un...
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