Search results

Introduction FEM is an effective and useful tool for better understanding of the mechanical behavior of the dental organs and prostheses.
The validity of the analysis is determined by accurate geometry, boundary conditions sets, material properties sets and loads.
Then, it is important to determine: To what extent will this kind of discrepancy affect the result of the FEM analysis?
Imaging properties of digital magnification radiography.
Factors influencing the accuracy of volume measurements in spiral CT: a phantom study.

The performance of a system being controlled is generally affected by various distortions, which may cause changes in the unknown parameters, e.g. attenuation, elasticity or thermal conductivity.
These distortions may be due to the deterioration of elements or the action of external factors, especially changes in temperature.
The inverse Fourier transform of the function resulting from the rejection of higher order terms is: (6) Assume that the impulse response of the low-pass differential filter is: , (7) where are the subsequent samples of the filtered signal, while is a Harris window described with the following equation (8) The parameter is selected in such a way that the tilt of the filter characteristic at the point is the same as the tilt of the ideal differentiating system, thus: . (9) The filter properties are dependent on the filter width , the cutoff frequency , the window shape and the filter order .
Other mathematical models describe the pulling force, which is reported to be affected both by the muscle material and its geometry [21, 22, 23, 24].
Fung, Biomechanics: Mechanical Properties of Living Tissues, 2nd ed.

He was of firm opinion that the properties of sintered products were more affected by the characteristics of the porosity.
He wrote: “This (controversy) is based on two factors.
· How does the magnitude of contact surface affect the structure and physical properties of the compact?
Mechanical properties are in a way consequence of electronic processes occurring during material comminution.
It is noteworthy that the structure and properties are controlled by mechanical activation.

Physico-mechanical means of surface modification is by grit-blasting with various abrasives (alumina, silica, apatitic abrasive), laser ablation, spark discharge, etc.
The surface chemistry depends on surface composition which is affected by physical and chemical treatments.
Because the process is at low temperature 25 to 60 o C), it allows the incorporation of bioactive molecules (e.g., growth factors,etc) in the coating, if desired.
Electrodeposition with Zn-ions impart anti-bacterial property to the implant surface [15].

Thus the factors that control the biological response to implant materials are a complex combination of mechanical, physical and chemical attributes which when combined favorably lead to 'bioactivity' in a material, or more correctly a 'bioactive' response to the material.
Physio-chemical properties such as surface chemistry and wettability are well known to affect the biological performance of biomaterials.
This is critical as it is the 'quality' of the adsorbed protein layer i.e. the protein species and confirmation that will ultimately affect cell recruitment, attachment and mobility [21, 22], factors which in anchorage dependant cells such as osteoblasts will have a resultant downstream effect on cell proliferation and differentiation [23].
Properties of osteoconductive biomaterials: calcium phosphates.

Due to the high cost of most powders used in MIM, raw materials are a determining factor in the final cost of the specimen.
In addition to cost, features of the particles also directly affect all the other steps of the process and hence the quality of the product.
This modification takes place through the use of a higher percentage of the surfactant agent present in the binder system, which provides the feedstock with better homogeneity and adds suitable rheological properties to the processing.
Despite the use of coarse particles, the material possesses satisfactory mechanical properties.
German: Advanced Properties Of High Density Ferrous Powder Metallurgy Materials, MPIF, Princeton, NJ, (2002).

To increase operating factors of the protective layers even further, additional compounds are added to the powder mixtures.
The structure and properties of protective layers based on self-fluxing alloys in combination with different hardening additives are presented in [6–8].
The structure and properties of protective layers based on self-fluxing nickel alloys in combination with TiB2 taken in various weight ratios (10-40 wt.%) presented in [9].
Research were conducted at core facility “Structure, mechanical and physical properties of materials” NSTU.
Pyczak, Influence of the Ti/Al/Nb ratio on the structure and properties on intermetallic layers obtained on titanium by non-vacuum electron beam cladding, Mater.

The first attempts to study the boiling of different liquids showed that the main parameters affecting the heat transfer coefficient in pool boiling are: heat flux, saturation pressure, thermophysical properties of the working fluids and some characteristics of the material contact surface (thermophysical properties, dimensions, surface finishing, microstructure, etc) [4].
It can be seen that the heating is carried out at atmospheric pressure, which is an important consideration for the calculation of thermophysical properties of sugarcane juice.
The expressions for finding the thermophysical properties present in this correlation are listed in Appendix-I [13-15].
To obtain the results shown in Tab. 5, it was considered that the surface temperature of the pot (Ts) is the temperature corresponding to the T1and the temperature at which the thermophysical properties of sugarcane juice were found is the average of T2, T3 y T4.
This factor also influences the mentioned heat transfer coefficient.

These LRC properties are the reasons for the low efficiency of LRC gasification.
The properties of Merit-Pila coal which were used in this simulation are tabulated as in Table 4 below.
Table 4: Properties of Merit-Pila coal.
Study of factors affecting syngas quality and their interactions in fluidized bed gasification of lignite coal.
International Journal of Automotive and Mechanical Engineering, 8, 1457

Kumar revealed that the orientation of the insert relative to the workpiece edge affected chip flow angle, and thus played an important part in burr formation.
Four different materials were tested for various combinations of tool geometries and cutting parameters to understand the effect of material properties on the tool exit order sequence (EOS).
It demonstrated that several geometric factors, such as tool exit/entrance, in-plane exit angle, un-deformed chip geometry and EOS, dominated burr formation for a specific material with certain ductility.
Besides, it has good plasticity and mechanical working properties and thus can be formed to products with various shapes.
During face milling with a large-diameter-cutter, EOS is one crucial factor that affects the size of exit burr.