This paper examines a set of parametric tunings for vibration absorbers to enhance stability in the event simultaneous chatter during machining and proposes novel tuning criterion minimizing definite integral frequency response function, while accounting damping absorber’s base component. Chatter vibrations are an inherent characteristic processes, common tool mitigating is tuned mass damper (T...

the occurrence of chatter vibrations in boring operation has a great influence in improving workpiece dimensional accuracy, surface quality and production efficiency. in this paper instability analysis of machining process is presented by dynamic model of boring machine. this model, which consists of machine tool’s structure, is provided by finite element method and ansys software. the model is...

the suppression of the regenerative chatter phenomenon in turning process via the variation of the frequency and amplitude of the spindle motor excitation is carried out in this research. a programmable inverter is employed for variable periodic excitation of the spindle motor. a set of turning experiments is designed and performed on a number of conical work pieces both in constant spindle spe...

Mindful meditation is bedeviled by the tendency of meditators mind to wander away from concentrating on breath, or other focus, and wandering random subjects stimulated memories distractions. The underling goal training learn how silence incessant chatter unfocused mind, Poetically referred as monkey enable being in moment.The Cocktail Party Effect a well studied, but little understood, higher ...

contemporary poets and writers use from their past legacy and their work influenced by the relationship to the bad or good works of the past writers whom they revealed strength and weakness of the past societies. najib mahfouz used past legacy in his work by “thartharafawq al-nil (“chatter on the nile”) and animate and quicken his novel with this skill. he used kinds of past legacies such as hi...