coeffcient of  friction  (cof)  for  rubber parts  is one of  the key parameters in their interaction with solid rough surfaces (micrometer to millimeter scales),  such  as  tire-road  interactions. cof  of  rubber  depends  on  viscoelastic properties of rubber, roughness characteristics of the counter-part surface, and process variables such as contact nominal pressure and sliding speed. due ...

the aim of the present study was the conducting of comparative analysis of allele pool of ukrainian population of thoroughbred horses and the populations from england, usa, russia and south korea using microsatellite loci of dna on the basis of our own researches and literary sources. comparative analysis of allele pool of thoroughbred populations from different countries was conducted using 6 ...

bilingual dictionary use in l2 writing test performance has recently been the subject of debate. opinions differ according to how the trait is understood and whether the system favors the process-oriented or product-oriented views towards the assessment and writing skill. given the need for more empirical support, this study is aimed at investigating the availability of bilingual dictionary use...

The vibration of a violin bridge is a dynamic contact vibration with two interfaces: strings-bridge, and bridge feet-top plate. In this paper, the mobility of an isolated bridge under in-plane excitation is explored using finite element modeling based on the contact vibration model. Numerical results show that the dynamic contact stiffness in the two contact interfaces has a great impact on the...

We present a current and charge conserving theory for the low frequency admittance of a quantum point contact. We derive expressions for the electrochemical capacitance and the displacement current. The latter is determined by the emittance which equals the ca-pacitance only in the limit of vanishing transmission. With the opening of channels the capacitance and the emittance decrease in a step...

There is little evidence supporting the widespread belief that regular patient-physician contact in chronic disease management leads to better patient outcomes. The objective of this study was to examine the relationship of the frequency of patient-physician contact with several patient outcomes in a prospective cohort study begun in 1995 of incident hemodialysis patients treated at 75 US dialy...

introduction: microbial keratitis is an infective process of the cornea with a potentially and serious visual impairments. contact lenses are a major cause of microbial keratitis in the developed countries especially among young people. therefore, the purpose of the present study was to evaluate the frequency and microbiological characteristic of clk in patients referred to the emergency depart...