نتایج جستجو برای: force degradation

تعداد نتایج: 337221  

Journal: :Land 2023

Soil erosion often leads to land degradation, agricultural production reduction, and environmental deterioration, which seriously restricts the sustainable development of regions. Clarifying driving factors soil is premise preventing erosion. Given lack current research on factors/force changes in different regions or under intensity grades, this paper pioneered use machine learning methods add...

2012
Yanwei Mao Yimin Zhang Rongrong Liang Lulu Ren He Zhu Ke Li Lixian Zhu Xin Luo

The objective of this study was to investigate the effect of rapid chilling (RC) on beef quality and the degradation of cytoskeletal proteins. Twenty Chinese Yellow crossbred bulls were selected and randomly divided into two groups. RC and conventional chilling (CC) were applied to left and right sides of the carcasses respectively after slaughtering. To determine whether electrical stimulation...

2014
Pei Han Moyan Tan Shaoxiang Zhang Weiping Ji Jianan Li Xiaonong Zhang Changli Zhao Yufeng Zheng Yimin Chai

A type of specially designed pin model of Mg-Zn alloy was implanted into the full thickness of lesions of New Zealand rabbits' femoral condyles. The recovery progress, outer surface healing and in vivo degradation were characterized by various methods including radiographs, Micro-CT scan with surface rendering, SEM (scanning electron microscope) with EDX (Energy Dispersive X-ray analysis) and s...

2014
Gwanghyeon Baek Alex Krasnov Willem den Boer Jerzy Kanicki

This work presents a comparative analysis of top gate a-IGZO TFTs fabricated on both soda-lime-silica glass and alkali-free borosilicate glass. Low-temperature ALD is selected for the deposition of gate dielectric to minimize a thermal stress. Comparing with TFTs on alkali-free borosilicate glass, TFTs with soda-lime-glass show similar threshold voltage and subthreshold swing, but slightly degr...

Journal: :Physical review letters 2003
M J Hogan C E Clayton C Huang P Muggli S Wang B E Blue D Walz K A Marsh C L O'Connell S Lee R Iverson F-J Decker P Raimondi W B Mori T C Katsouleas C Joshi R H Siemann

We report on the first study of the dynamic transverse forces imparted to an ultrarelativistic positron beam by a long plasma in the underdense regime. Focusing of the 28.5 GeV beam is observed from time-resolved beam profiles after the 1.4 m plasma. The strength of the imparted force varies along the approximately 12 ps full length of the bunch as well as with plasma density. Computer simulati...

Journal: :Environmental science & technology 2004
Kung-Hui Chu Shaily Mahendra Donald L Song Mark E Conrad Lisa Alvarez-Cohen

Stable isotope analysis is recognized as a powerful tool for monitoring, assessing, and validating in-situ bioremediation processes. In this study, kinetic carbon isotope fractionation factors (epsilon) associated with the aerobic biodegradation of vinyl chloride (VC), cis-1,2-dichloroethylene (cDCE), and trichloroethylene (TCE) were examined. Of the three solvents, the largest fractionation ef...

2006
M. Rojek

Purpose: The purpose of this paper was to find relationship between the degree of strength degradation caused by fatigue and the changes of ultrasonic wave characteristics such as wave velocity and damping coefficient. Design/methodology/approach: Epoxy-glass composites were subjected to oscillatory bending loadings with constant deflection. During fatigue procedure the force needed to achieve ...

2010
Seungik Baek Thomas J. Pence

A finite strain model for the mechanical degradation of composite materials with multiple families of fine reinforcing fibers is developed and studied. At any instant of time the matrix material may or may not be degrading with all, some, or none of the interpenetrating fibers also undergoing degradation. This multi-component description of damage is governed by coupled differential equations w...

Journal: :Microporous and Mesoporous Materials 2022

As a new family of functional porous materials, conjugated polymers (CPPs) with tuneable porosities and molecular architectures show great potentials in adsorption, light harvesting, catalysis applications. This paper describes the incorporation strong visible-light absorbing BODIPY molecules into skeleton CPPs via Sonogashira coupling reactions. The obtained displayed integrated properties hig...

Journal: :Dental press journal of orthodontics 2013
Glaucio Serra Guimarães Liliane Siqueira de Morais Margareth Maria Gomes de Souza Carlos Nelson Elias

INTRODUCTION The degradation of elastic ligatures in the oral environment results in the need of periodic replacement to maintain the optimal force during the orthodontic treatment. The purpose of this study was to perform a clinical prospective randomized study of the degradation of orthodontic elastomeric ligatures in the oral environment by scanning electron microscopy (SEM) and tensile stre...

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