Seam Characteristics of Jeans Wear خواص حياکات ملابس الجنز

Wear Characteristics of Metallic Biomaterials: A Review

Metals are extensively used in a variety of applications in the medical field for internal support and biological tissue replacements, such as joint replacements, dental roots, orthopedic fixation, and stents. The metals and alloys that are primarily used in biomedical applications are stainless steels, Co alloys, and Ti alloys. The service period of a metallic biomaterial is determined by its ...

Seam Wave Characteristics in an Eastern U.S. Coal

Effect of Fiber Surface Treatment on Wear Characteristics of Carbon Fiber Reinforced Polyamide 6 Composites

Ozone modification method and air-oxidation were used for the surface treatment of polyacrylonitrile(PAN)-based carbon fiber. The surface characteristics of carbon fibers were characterized by X-ray photoelectron spectroscopy (XPS). The interfacial properties of carbon fiber reinforced polyamide 6 (CF/PA6) composites were investigated by means of the single fiber pull-out tests. As a result...

The Jeans Mechanism and Bulk-viscosity Effects

In this paper we study the gravitational instability in presence of viscosity. In particular, the standard Jeans Mechanism is analyzed taking into account bulk-viscosity effects in the first-order Newtonian dynamics. We show how the perturbation evolution is damped by dissipative processes and the top-down fragmentation mechanism is suppressed for strong viscous effects. The critical value of t...

Investigation of friction and wear characteristics of palm biodiesel

0196-8904/$ see front matter 2012 Elsevier Ltd. A http://dx.doi.org/10.1016/j.enconman.2012.12.002 ⇑ Corresponding author. Tel.: +60 3 79675212; fax: E-mail addresses: [email protected] (M.A. Fazal), Haseeb), [email protected] (H.H. Masjuki). Use of biodiesel in automobile engine is creating tribology related new challenges. The present study aims to assess the friction and wear characteristics o...