At the past, damaged tissue was removed from the body of patients. But now tissue regeneration using scaffolds and implants are used to repair the damaged tissue and organs. Besides of the mechanical properties of metallic biomaterials, they suffer from bioinertness. Using some surface treatment techniques, the bioactivity and also corrosion resistance of titanium implants could be improved. In...

The thickness of wooden top plates is of considerable importance to luthiers. However, the geometry of an assembled instrument makes thickness measurements difficult using standard techniques. Here we describe a device that measures the thickness of a top plate by measuring the magnetic field produced by a small rare-earth magnet located on the inside of the instrument. The magnetic field is me...

introduction: the purpose of this study was to evaluate the morphologic surface of gutta­percha cones after cutting with different methods. materials and methods: the apical 3 millimeters of forty standardized, gutta-percha cones size 40 were cut off using scissors or a scalpel against a glass slab. the samples were then examined under scanning electron microscopy (sem) for topographic deformit...

This paper presents an alternative environment-friendly thermal insulation material for the construction industry. We aimed to produce this building with superior heat resistance properties and comparable strength concrete produced Ordinary Portland Cement. The primary purpose of experimental studies is a basic geopolymeric plate add cellubor polypropylene fibers mortar. In next stage, fiber-re...

A new method for unconstrained optimization in •" is presented. This method reduces the dimension of the problem in such a way that it can lead to an iterative approximate formula for the computation of (n 1) components of the optimum while its remaining component is computed separately using the final approximations of the other components. It converges quadratically to a local optimum and it ...

Nanoparticles made of biodegradable polymers has become the best approach for nanoparticle making due to their compatibility with the human body. New glycerol adipate polymers with hydroxyl group substituted with different percent of acyl group, sited as figures within the abbreviated name in the text, and triptophan were synthesized and proposed to be used in the preparction of dexamethason ph...

Tungsten is a promising candidate for plasma-facing material in tokamaks. This study aims at determining whether the cut-surface roughness of rolled tungsten plates (RTPs) can be improved using an abrasive water jet (AWJ) through tests combined with modeling cutting-process parameters. Based on key factors affecting roughness, magnitude and type test were increased, compared previous study. A b...

Silicon carbide (SiC) is one of the advanced engineered ceramics materials designed to operate in extreme environments. One of the main reasons for the choice of this material is due to its excellent electrical, mechanical and optical properties that benefit the semiconductor, MEMS and optoelectronic industry respectively. Manufacture of this material is extremely challenging due to its high ha...