نتایج جستجو برای: back compressive force

تعداد نتایج: 361244  

Journal: :international journal of transportation engineereing 2014
behrooz shirgir amir reza mamdoohi abolfazl hassani

pervious concrete is a concrete mixture prepared from cement, aggregates, water, little or no fines, and in some cases admixtures. the hydrological property of pervious concrete is the primary reason for its reappearance in construction. much research has been conducted on plain concrete, but little attention has been paid to porous concrete, particularly to the analytical prediction modeling o...

Journal: :Journal of neurophysiology 2000
P S Khalsa C Zhang Y X Qin

The ability of a spatial population of cutaneous, Adelta, and C mechano-nociceptors to encode the location and intensity of a noxious, cutaneous indentation was examined using an isolated preparation in a rat model. Skin and its intact innervation were harvested from the medial thigh of the rat hindlimb and placed in a dish, with the corium side down, containing synthetic interstitial fluid. Th...

Journal: :The Journal of experimental biology 2000
Y Jiao S Gorb M Scherge

The tarsi of the cricket Tettigonia viridissima bear flexible attachment pads that are able to deform, replicating the profile of a surface to which they are apposed. This attachment system is supplemented by a secretion produced by epidermal cells and transported onto the surface of the pad through the pore canals of the pad cuticle. This study shows that the secretion alone is necessary, but ...

2017
Su-Jin Jeon Young-Mi Moon Min-Seock Seo

Objectives The aims of this study were to quantify tug-back by measuring the pulling force and investigate the correlation of clinical tug-back pulling force with in vitro gutta-percha (GP) cone adaptation score using micro-computed tomography (µCT). Materials and Methods Twenty-eight roots from human single-rooted teeth were divided into 2 groups. In the ProTaper Next (PTN) group, root canal...

2016
Navid Ranjbar Mehdi Mehrali Arash Behnia Alireza Javadi Pordsari Mohammad Mehrali U. Johnson Alengaram Mohd Zamin Jumaat Warren Batchelor

As a cementitious material, geopolymers show a high quasi-brittle behavior and a relatively low fracture energy. To overcome such a weakness, incorporation of fibers to a brittle matrix is a well-known technique to enhance the flexural properties. This study comprehensively evaluates the short and long term impacts of different volume percentages of polypropylene fiber (PPF) reinforcement on fl...

Journal: :Applied sciences 2021

Safety standard requirements must be implemented for lumbar support robots, which are mainly used preventing low back pain (LBP) in caregivers. Usually, simulations to mimic actions that not allowed a real person. However, comprehensive validation of simulator dynamic conditions has been conducted. In this study, an ergonomic is validated through forward flexion invasive experiments. The corres...

Journal: :Cytotechnology 2016
Wen Liao Masahiro Okada Kaoru Inami Yoshiya Hashimoto Naoyuki Matsumoto

This study investigated cell survival and gene expression under various compressive stress conditions mimicking orthodontic force by using a newly developed in vitro model of human periodontal ligament-like tissue (HPdLLT). The HPdLLT was developed by three-dimensional culturing of human periodontal ligament fibroblasts in a porous poly-L-lactide matrix with threefold increased culture media pe...

Journal: :J. Applied Mathematics 2012
Kyungsoo Kim Yoon Hyuk Kim SuKyoung Lee

A general computational model of the human lumbar spine and trunkmuscles including optimization formulations was provided. For a given condition, the trunk muscle forces could be predicted considering the human physiology including the follower load concept. The feasibility of the solution could be indirectly validated by comparing the compressive force, the shear force, and the joint moment. T...

Fatemeh Azadinia, Javad Sarrafzadeh, Mojtaba Kamyab, Mostafa Hosseinabadi,

Background: The back extensor muscles are the main spinal supportive factors which function establishes spinal stability and erect posture of the spine. Spine deviation from the ideal alignment, like abnormal increase in the forward curvature of the thoracic spine may cause changes in the trunk muscle activity which can lead to a change in the spinal proprioception. It seems that the corrected ...

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