We show that viscoelastic effects play a crucial role in the damping of vibrational modes harmonic amorphous solids. The relaxation given plane wave is described by memory function semi-infinite one-dimensions mass-spring chain. initial energy spreads from first site chain to infinity. In beginning chain, there barrier, which significantly reduces decay below Ioffe-Regel frequency. To obtain pa...

relaxation is one of the important mental skills in physical education and sportsactivities. relationship between relaxation and rhythmic exercises with anemphasis on flexibility-functional mechanisms of nervous system has receivedattention in recent studies. the aim of the present study was to investigate the effectof rhythmic exercises on deepening the relaxation of national judo athletes. fo...

abstract introduction: hypertension is one of the most prevalent chronic diseases worldwide. because of its chronicity, hypertension requires life-long therapy. many patients tend to discontinue therapy and seek alternative treatments. in this study, we evaluated the efficacy of two behavioral therapeutic techniques, namely relaxation and biofeedback-assisted relaxation in reducing blood pressu...

The construction of complex objects, such as an aircraft, requires the creation of a dedicated industrial system. By industrial system, we mean all the material and immaterial means used to build the object (labor, machines, factories, etc.). Classically, this means of production is defined after that the design of the product. In other words, the specifications of the product are the requireme...

results the results showed that compared to the control group, relaxation (23.2) and positive self-talk (21.25) treatment methods alone can reduce pms (p < 0.001). on the other hand, a combined (relaxation + positive self-talk) treatment method (13.75) was more effective in reducing pms compared to relaxation or positive self-talk alone. conclusions it seems that psychological therapy based on ...

a bstract  background: pregnancy may be accompanied by serious physiological and psychological changes as it is a stressful period in a woman’s life. so, this study was conducted to determine the effect of progressive muscle relaxation on pregnant women’s general health.   materials and methods: in this clinical trial, 60 primigravida women admitted to the prenatal clinic of selected hospitals ...

The dynamics of ring polymer melts are studied via molecular simulations the Kremer–Grest bead-spring model. Rouse mode analysis is performed in comparison with linear polymers by changing chain length. Rouse-like behavior observed quantifying length dependence relaxation time, whereas a crossover from to reptation polymers. Furthermore, non-Gaussian parameters monomer bead displacement and cen...

conclusion in breast cancer after nac, the lesion t2 relaxation time was reduced in the responders, and this finding is potentially useful to assess the response to nac. results in 26 cases with nac, the mean lesion t2 relaxation time before nac was 81.34 ± 13.68 ms, compared with 64.50 ± 8.71 ms after nac. significant differences in the lesion t2 relaxation times existed between the pre- and p...