نتایج جستجو برای: haversian system
تعداد نتایج: 2231174 فیلتر نتایج به سال:
The overall mechanical behaviour of cortical bone is strongly dependant on its microstructure. X-ray computed tomography (XCT) has been widely used to identify the microstructural morphology tissue (i.e. pore network, Haversian and Volkmann's canals). However, connection between microstructure mechanics during plastic deformation unclear. Hence, purpose this study provide an in-depth evaluation...
In spite of the fact that the potential usefulness of bone histology in systematics has been discussed for over one and a half centuries, the presence of a phylogenetic signal in the variation of histological characters has rarely been assessed. A quantitative assessment of phylogenetic signal in bone histological characters could provide a justification for performing optimizations of these tr...
A theoretical model to characterize the stress induced fluid flow in cortical bone has been developed using triple porosity theory. The construction of the model starts with assumption involving three interacting fluid compartments: microporosity of the bone matrix, the lacunar-canalicular porosity and the vascular porosity associated with the Haversian Canals. On the basis of deductive conside...
implicit and unobserved errors and vulnerabilities issues usually arise in cryptographic protocols and especially in authentication protocols. this may enable an attacker to make serious damages to the desired system, such as having the access to or changing secret documents, interfering in bank transactions, having access to users’ accounts, or may be having the control all over the syste...
Bone shows a radial gradient architecture with the exterior densified cortical bone and interior porous cancellous bone. However, previous studies presented uniform designs for scaffolds that do not mimic natural bone's structure. Hence, mimicking native structures is still challenging in tissue engineering. In this study, novel biomimetic scaffold Haversian channels designed, which approximate...
due to lack of knowledge management system in the organization of technical and vocational university of iran (tvuni) and losing good employees because of retirement and substitution causes huge amount of costs to replace the similar expertise. there is no any suitable system in the tvuni to store, to document, and to distribute knowledge. based on the university’s features such as it has diffe...
abstract abstract of thesis (includes summary, goals, execution methods, and results) story “al-obnosat al-bayza” is one of the short stories from “hanna mineh” collection. this story is a selection of lives of some humans during a voyage together, each of them is a symbol of human nature (love, mind, kindness) and examine social, cultural, and political aspects of governing system, and it...
in this thesis,spin dependend transport and electron transport through of ng/sg(graphene/ superconductor graphen) are studied in the junction of ng/fgt/sg. due to andreev reflection conductance increases in the presence of superconductor graphene.also, by applying a voltage gate on a superconductor, fermi level shifts and the conductance is independent of ferromagnatic substrate. also, the cond...
Palaeohistologists who work with well-preserved cortical bone can examine two-dimensional (2D) histology images for quantitative parameters of secondary osteons and Haversian canals to reconstruct past remodelling. Standard techniques in this space include area measurements counts components recorded from an image. The ‘point-count’ technique involves counting all the items (e.g., osteons, oste...
Abstract The structure and geometry of bone depend on many biological environmental factors. These factors affect the tissue's microstructure differently, their interaction has not yet been fully elucidated. Our research investigated effect body mass macro- compact bone. Therefore we analyzed humerus femur bones from females 11 cows sheep at age 4–10 years. Both species have very similar dietar...
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