This paper presents a novel condition monitoring method for rolling bearings, based on measuring the electric bearing impedance. The can diagnose presence of damage by frequency-domain analysis, and its extension along raceway time-domain analysis. latter enables assessment severity progression damage. A fatigue test shows that occurrence pittings in raceways causes characteristic peaks impedan...

Protection of mitochondrial proteins from glycation by endogenous dicarbonyl compounds, methylglyoxal and glyoxal, was found recently to prevent increased formation of reactive oxygen species and oxidative and nitrosative damage to the proteome during aging and produce life extension in the nematode Caenorhabditis elegans. This suggests that dicarbonyl glycation damage to the mitochondrial prot...

The purpose of this article is to model defect nucleation. considered as a small volume which evolves damaged zone. damage described by transition zone can be sharp or continuous. In the first case, discontinuities occur and initiation based on bifurcation an equilibrium state. When continuous, continuous.The analysis considering different models damage, depending regularity imposed mechanical ...

Life extension of high cost components until measurable damage is detected can result in marked re ductions in total cycle costs. The life extension strategy for turbine disks is based upon nondestructive inspection to detect defects, usage and stress analysis to define requirements, and fracture mechanics analysis and testing to evaluate the severity of any defects under future usage. Because ...

this research was based on primary data collected through well designed and pre-tested questionnaire, to determine awareness of farmers on extension methods used by adp in kano state of nigeria. multistage sampling technique was used, in which three local governments were randomly selected. secondly, three wards one each from the selected local governments (danbatta, gaya and madobi) were rando...

present study was conducted in the three provinces of pakistan with the objectives to study the curricula relevancy with the participatory extension, supervision and administration and its practical applicability at the field level. for this extension agents of the selected provinces were selected purposively. mail questionnaire were used as instruments for data collection form 227 respondents ...