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Introduction There is a growing attention in the production of nanometer size materials because of their unique properties, which apply in various industries.
The gas-like and liquid-like properties of supercritical fluids have been proposed attractive as larger diffusivities, which lead to higher rates of mass and heat transfer ([2] -[4]).
These super advance properties of SCF make it so applicable in the production of nanosized particles.
Several factors such as heating rate, temperature, and concentration of reactants are significantly affected the mixing during the process of nano-sized particle formation.
Other design factors and process parameters of mixer are proposed for future investigations.

The transition of drops of electrode metal into the weld pool significantly affects the quality of industrial products.
This property is provided by the impact of surface tension forces.
An important factor influencing the heat and mass transfer of the electrode metal during surfacing with a strip electrode is the melting feature of the strip.
Experimental data of the conducted studies have shown (see Fig. 3-4) that the dependences of the parameters of heat and mass transfer when using control impacts have an extreme character, and the thermophysical properties of the material of the electrode strip have a certain effect on the size and mass of drops.
The results of the study of droplet transfer during surfacing by strip electrodes with control impacts were processed using the applied software, which made it possible to determine the change in the average statistical indicators depending on the thermophysical properties of the electrode material (Table 3).

Introduction Since the microstructure of engineering materials determines a wide variety of mechanical properties, the study of microstructure-property relationship has been of great interest to the scientists and engineers.
Of all the microstructural parameters which influence the mechanical properties of polycrystalline metals and alloys, the grain size has been proved to be the most important.
The strong influence of grain size on the mechanical properties of materials, a subject of continuous investigation since the early work of Hall [1] and Petch [2], has been observed with historical roots going back many decades.
In recent years the availability of nanocrystalline (NC) materials paves the way for the potential discovery of new phenomena observable only in the NC regime, igniting a renewed interest in the influence of grain size on the mechanical properties of materials.
Local examination of the interaction between dislocations and grain boundaries A nanoindenter combined with an AFM (NI-AFM) has been used to study the effects of grain size on the mechanical properties of Ni at a local scale [21, 22].

When fluorine atomic substituted the hydrogen of Siloxane methyl, fluorine atoms and carbon atoms bonded strongly, thereby fluoroalkyl played a "shielding" role on Si-O main chain, and blocked the influence of external factors.
By adjusting the length and proportion of "soft segment" and "hard segment", the hydrophobic / oleophobiccan can be adjusted, but the hydrophobic properties is not affected, when the silicone content increased.
They found hydrophobic properties of the copolymer is not affected by silicone and the composition of fluoropolymer surface.
Other characters Introduce polydimethylsiloxane to other polymers can improve the polymers’ performance of mechanical properties, thermal stability and so.
Baysal [22] studied the mechanical properties of PDMS-b-PS copolymer, when the content of PDMS in copolymer is 12% to 18%, the mechanical properties of the new copolymer is different from PS homopolymer.

It has a great influence on the viscosity of the material, on the flows and finally on the final shape and mechanical properties of the thixoforged parts.
Introduction Semi-solid forming is an innovative technology offering the opportunity to manufacture complex components with high mechanical properties in one step.
These parameters are critical for effective process control, since they affect the microstructure development [1], rheological behavior [2] and therefore the material flow [3] during processing.
However, a random 2D section may lead to some error in shape factor, grain size distribution and liquid quantification, in particular- because the solid grains are not spherical but have a complex shape due to the agglomeration process in the semi-solid state.
Rouff, Characterisation of semi-solid material mechanical behavior by indentation test, J.

The MEMS/micro parts have together with the microscopic properties such as the scale of the cavities or the embedded voids, crystal plasticity, anisotropic behavior, grain size, and the macroscopic properties.
As the material thickness decreases to the same order of magnitude as grain size, the mechanical properties of the individual grains will dominate the properties of the material.
It could be predicted that anisotropic properties by applying grain boundary effect occurs.
Also the embedded voids and the cavities cause anisotropy in which these factors are neglected in the macroscopic level.
In future study, a study for anisotropic properties by these factors would be carried out.

Slurry flow visualisation of chemical mechanical polishing based on a computational fluid dynamics model Y.B.
The contact mechanics models assumed that the wafer and pad were in direct contact during the polishing process and the material removal rate was mainly influenced by the polishing pressure, pad and wafer physical properties and their interactions [5].
However, the increase of the pad rotational speed significantly affected the velocity vector field, referring to Figs. 3 (a), (d) and (e).
This can be explained by the Preston material removal model which is related to the polishing pressure, relative velocity of the pad and wafer and a constant that accounts for the other factors such as the interactions effect or chemicals [13].
Tanaka: Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 73 (2007), p1806

Moon 1,c 1 School of Mechanical Engineering, Engineering Research Center for Net Shape and Die Manufacturing, Pusan National University, Busan 609-735, Korea a korea@pusan.ac.kr, b bulkkot@empal.com, cyhmoon@pusan.ac.kr Keywords: Hydroforming, Hydro-formability, Fuzzy expert system, Fuzzy rule Abstract.
In general, The quantitative relationship between process parameters such as internal pressure and feeding amount and hydroformability is hard to establish because of their high complexity and many unknown factors.
Correlation study between tube hydroforming parameter and hydroformability All parameters affecting on tube hydroformability are related to hydroforming process.
Some kind of parameter that affect on hydroformability heavily , can be controlled by researcher are kind of steel pipe, feeding amount and internal pressure.
The kind of steel pipe is that steel pipe has material properties in proportion to internal pressure having maximum endurance.

However, EPS concrete has substantially affected the transition zone of elastic behavior of the element.
Previously, some researchers have focused on mechanical properties of lightweight concrete using foaming agent and replacing some part of the standard aggregate used that having less in density with cost-efficient materials [1,2].
However, the characteristic of low-density aggregate influenced the modulus of elasticity of lightweight concrete and affected the bonding with cement-paste.
Chen [6] demonstrated that the addition of silica fume, fly ash or bonding additives to the concrete matrix has been significantly improved the uniformity of EPS and mechanical properties of the concrete.
Although several studies conducted on the mechanical properties and prediction the elastic modulus by simulation of lightweight concrete, only a few focused in the literature to predict the modulus of elasticity from existing models in codes of practice and limited empirical models have been proposed especially for dry press EPS concrete.

In addition, the structures of carbon fiber is usually thought to be composed of crystalline and holes in two dimensional ordered, and the void content, size and distribution has a great impact on the performance of carbon fiber, and the crystal structure and defect structure is the main factor affecting the strength of carbon fibers.
It was investigated with glass fiber, carbon fiber as reinforced material, polyurethane foam for the vibration characteristics and frequency of composite matrix production response characteristics, and compares this with Sitka spruce that is suitable for making musical instrument panel, the results shows that, for the glass fiber reinforced composite materials, when the glass fiber volume fraction reaches 15%, the mechanical properties of musical instrument panel materials can be satisfied, but it is difficult to produce a composite material with so high glass fiber content.
Species limits are the result of years of production experience, and the species have inherent properties, which are the things they should possess and are indispensable as musical instrument materials.
Current research focuses on the evaluation of acoustic vibration properties of wood unit for making instruments soundboard, and it seldom involves in the acoustic vibration characteristics of the whole block of finished product soundboard.
Therefore, how to evaluate the acoustic vibration properties of the finished board is an important topic. (2) Application of physiological and psychological index to assess acoustic vibration properties of wood for musical instruments sounding board. (3) Strengthening the process of acoustic signals.