the entire land in the southern iran faces problems arising out of various types of land degradation, of which the vegetation type forms one of the major ones. the payab basin (522,470 ha), which covers the lower reaches of mond river, was chosen for a test risk assessment of this type. the different kinds of data for indicators of vegetation degradation were taken from the records and publishe...

     In recent years, large rangeland areas have been destroyed for various reasons, so that its negative impacts on local people's income and sustainable livelihood are become significant. Due to the fact that signs of negative or downward trends in the rangelands condition are being revealed prior to the complete degradation, a study was done to identify these sings and evaluate their importa...

Introduction Conclusions References

the term degradation is used to specify the status of the environment. it is often associated with ‘improper use’. ‘use’ also implies environmental aspects other than physical ones and implies that the more intensive the use, the more susceptible the environment is to degradation, particularly if proper care for the environment is lacking. the question is, and has always been, how to map someth...

Power electronic converters are an important element in the interaction between source and load. In fact, failures this system often lead to bigger problems. Therefore, it is necessary monitor converter components that have most failures. work, we present estimation of three parameters, which are, turn, degradation indicators power converters: equivalent series resistance, capacitance on-state ...

Recently, new objective speech quality evaluation methods, designed and adapted to new high voice quality contexts, have been developed. One interest of these methods is that they integrate voice quality perceptual dimensions reflecting the effects of frequency-response distortions, discontinuities, noise and/or speech level deviations respectively. This makes it possible to use these methods a...