Despite continuous progress toward tissue engineering of functional articular cartilage, significant challenges still remain. Advances in morphogens, stem cells, and scaffolds have resulted in enhancement of the bulk mechanical properties of engineered constructs, but little attention has been paid to the surface mechanical properties. In the near future, engineered tissues will be able to with...

Lubrication expressions for the friction coefficients of a spherical particle moving in a fluid between and along two parallel solid walls are explicitly evaluated in the low-Reynolds-number regime. They are used to determine lubrication expression for the particle free motion under an ambient Poiseuille flow. The range of validity and the accuracy of the lubrication approximation are determine...

introduction urogenital atrophy is a common problem after menopause, and results from declining estradiol levels and may causes symptoms that can significantly affect quality of life. the aim of this study was to determine the effect of the vaginal suppository of vitamin e in the treatment of atrophic vaginities. materials and methods this randomized, double-blind controlled trail study was car...

In order to develop more efficient engines, it is essential to optimize the lubrication circuit of the power train systems. In this paper, during an engine design and development process, a network analysis of the engine lubrication system is described in detail. Two elements have been added to the lubrication circuit in the modified engine. These elements are hydraulic lifters and an Anti-drai...

The transition from boundary lubrication to fully hydrodynamic lubrication is investigated for air-lubricated slider bearings using the electrical resistance method. Intermittent contacts are shown to exist even under conditions for which the numerical solution of the Reynolds equation or white light interferometry predicts steady state spacings in the spacing region from 0.125 to 0.25 pm. The ...

In situ lateral force microscopy (LFM) and X-ray photoelectron spectroscopy (XPS) were used to probe the lubrication behavior of an aqueous solution of poly(oxyethylene)-poly(oxypropylene)-poly(oxyethylene) (PEO-PPO-PEO) symmetric triblock copolymer on thin films of polypropylene (PP), polyethylene (PE), and cellulose. LFM experiments were carried out while the substrates were immersed in water...

In high speed rotating machines such as turbines and generators, vibrations of a rotating shaft often hinder the smooth operation of the machine or even cause failure. Oil whip is one of such vibrations due to oil film action of journal bearing. Its mechanism and preventive method is explained and proposed in this paper. Further theoretical and experimental analyses are made for considering hea...

Articular cartilage is a highly efficacious water-based tribological system that is optimized to provide low friction and wear protection at both low and high loads (pressures) and sliding velocities that must last over a lifetime. Although many different lubrication mechanisms have been proposed, it is becoming increasingly apparent that the tribological performance of cartilage cannot be attr...

Background & aim: Women and men with diabetes, type 1 (T1D) 2 (T2D) develop complications in small large blood vessels as well nerve pathways over time. In men, erectile dysfunction is a well-documented complication. However, sexual women different types of diabetes less studied. Sexual associated lowered health-related quality life depression. The aim the study was to investigate self-repo...

Abstract Introduction Vaginal estrogen therapy (VET) use and efficacy is well established for genitourinary symptoms commonly seen in menopause. Despite the similar symptom profile dramatic hormonal shifts postpartum (PP) patients, they are not routinely offered same therapies. The pathophysiology of these PP multifactorial frequently dismissed as “normal,” even with subsequent negative effect ...