نتایج جستجو برای: damage extension
تعداد نتایج: 373188 فیلتر نتایج به سال:
Uncontrolled groundwater outbursts from underlying limestone aquifers into mining excavations present a significant safety challenge for underground coal mining in China. Although these mining hazards have been known for decades, the mechanism for groundwater outbursts remains elusive. A fully coupled flow-stress-damage model is presented to simulate the progressive development of fractures and...
Today, privatization of agricultural extension services is recognized as an appropriate approach to compensate for any weakness that the traditional extension system might have. The primary objective of this research was to study the attitude of the national top managers (including general managers, their deputies, and extension managers) of Jihad-e Keshavarzi Organizations (JKO), toward privat...
This research can be considered as one of the studies that seek to explore, in an argumentative way, subtle and solid philosophical concepts in the field of art. The paper provides an analysis of the concept of “extension” in music as one of the most thought-provoking philosophical concepts. The analysis is carried out by interpreting Ibn-Sina’s special conception of musical extension to answer...
The thermo-mechanical properties of carbon black reinforced natural and styrene butadiene rubbers are investigated under rapid adiabatic conditions. Eleven grades with varying surface area structure at 40 parts per hundred (phr) loading studied the unreinforced equivalents included for reference. results show a strong correlation modulus, mechanical hysteresis, temperature rise calculated cryst...
The continuous rapid development of telecommunications and computer-based information technology (IT) is probably one of the biggest factors of change in agricultural extension, which will facilitate and reinforce other changes. There are many possibilities for the potential applications of the technology in agricultural extension, about which attitudes of extension professionals is highly impo...
Oxidative base damage in DNA and metabolic defects in the recognition and removal of such damage play important roles in mutagenesis and human disease. The extent to which cellular RNA is a substrate for oxidative damage and the possible biological consequences of RNA base oxidation, however, remain largely unexplored. Since oxidatively modified RNA may contribute to the high mutability of retr...
identifying role of extension system in adoption of new technologies have important role to developing favorable extension systems. for supporting sustainable agriculture in iran needs extension systems to be carefully thought and accurately implemented. the purpose of this is analyzing role of extension activities in adoption of sustainable agriculture. based on the results the attending agric...
PURPOSE Increasing evidence suggests a central role for mitochondrial (mt) dysfunction in age-related macular degeneration (AMD). Previous proteomic data from the retinal pigment epithelium (RPE) revealed significant changes to mt proteins, suggesting potential functional defects and damage to mitochondrial DNA (mtDNA) with AMD progression. The present study tests the hypothesis that mtDNA dama...
This study assessed ultrastructural muscle damage in young (20-30 yr old) vs. older (65-75 yr old) men after heavy-resistance strength training (HRST). Seven young and eight older subjects completed 9 wk of unilateral leg extension HRST. Five sets of 5-20 repetitions were performed 3 days/wk with variable resistance designed to subject the muscle to near-maximal loads during every repetition. B...
To determine possible age differences in muscle damage response to strength training, ultrastructural muscle damage was assessed in seven 20- to 30-yr-old and six 65- to 75-yr-old previously sedentary women after heavy-resistance strength training (HRST). Subjects performed unilateral knee-extension exercise 3 days/wk for 9 wk. Bilateral muscle biopsies from the vastus lateralis were assessed f...
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