in this paper, a simple and efficient method for modeling and solving the equations of a rotor with any number of disks, bearings and mass unbalances is presented using the assumed modes method. this model consists of a continuous shaft, arbitrary number of mass unbalances in any axial location and phase angle, and any number of rigid disks and bearings. this arrangement is extensively used in ...

A five-year-old Holstein cow with a history of vaginal prolapse was admitted to the Large Animal Clinic, Faculty of Veterinary Medicine, University of Tabriz. According to the owner, she had a 5-month history of vaginal prolapse and frequent sanguineous discharge from the vagina. Appetite was normal and its last parturition was two months ago. Clinical examination revealed a tumor like mass tha...

background obesity is one of the most common nutritional problems in adolescent. knowing eating behavior of adolescents improve our understanding about this pandemic and helps design an appropriate preventive and care plan. methods in a cross-sectional study, 372 students selected randomly from 8 guidance schools of shiraz, iran, during august-december 2009. body weight was measured to the near...

geotextiles are one of the most widely used synthetic materials in filtration and drainage applications. since in real applications, geotextiles are subjected to various hydraulic gradients and confining stresses, hydraulic behavior of geotextiles under different circumstances is of great practical importance. in this study filtration and drainage properties of several nonwoven needle-punched g...

We derive the observed luminosity function of virialized systems. Coupling this statistic with the mass function predicted by CDM cosmogonies we obtain the functional behavior of the mass–to–light ratio over a wide dynamical range in mass. We conclude that the mass–to–light ratio has a minimum close to the luminosity of an L∗ galaxy halo. We also show how to derive in a self-consistent way the ...

Repeatability is an important concept in evolutionary analyses because it provides information regarding the benefit of repeated measurements and, in most cases, a putative upper limit to heritability estimates. Repeatability (R) of different aspects of energy metabolism and behavior has been demonstrated in a variety of organisms over short and long time intervals. Recent research suggests tha...

Much attention has been paid recently to bistability and switch-like behavior that might be resident in important biochemical reaction networks. There is, in fact, a great deal of subtlety in the relationship between the structure of a reaction network and its capacity to engender bistability. In common physicochemical settings, large classes of extremely complex networks, taken with mass actio...