Search results

Because of its heterogeneous nature, this composite amalgamation has various grain sizes.
Eqs. (2) and (3) are transformed to calculate the outer diameter D of the screw through the equations: (4) (5) where: n is the number of revolutions required for the screw to reach a flow rate and it is calculated by Eq. 4.
From equation (4) the required number of revolutions of the screw is n = 106 rpm.

Here, D is the numbers of dimensions of space, k Boltzmann constant (1.38×10 -23 J/K), T the temperature, t time.
(a) and (b) that β- Si3N4 rod grains appear randomly distributed in the specimen which was prepared without exposure to the magnetic field.
In the simulation, the amount of the initial oriented crystals, which are labeled zero as the orientation number, was changed as 10%, 12%, 15%, 18% and 20%.

Sandstones are gray, light gray, fine and medium-grained on clay cement; sometimes they are of calcareous nature.
A number of research works have been devoted to the geological structure of the Upper Jurassic deposits of the Sredne-Ugutskoye oil field (Kirsanov V.V., TsGE, OJSC, 1997; Fursov A.A., Aldzheok, LLC, 2000; Chistyakov V.B., Actual Geology, JSC, 2001; Steve Nicolais, Taissia Cheshire, “FDP-Centre”, 2001; Bilibin S.I., TsGE, OJSC, 2005), which consider the issues on formation of the development zones of the reservoir units and their porosity and permeability properties (PPP).
Forma-tion Subfacie Htotal [m] Heff [m] Productivity index [unit fraction] Productivity index, ‧10-3 [μm2] Heterogeneity factor [unit fraction] Net-to-gross sand ratio [unit fraction] Number of permeable intervals [units] YUS11 River mouth bars and beaches 15.7 10.0 0.179 33.4 0.63 0.64 3.3 Shallow shelf 15.2 4.7 0.167 18.5 0.46 0.31 4.6 YUS12 Alongshore bars 10.9 5.0 0.174 31.2 0.74 0.46 1.3 Offshore shelf area 14.8 3.0 0.158 4.2 0.51 0.20 2.3 River mouth bars and beaches 13.5 8.6 0.171 17.5 0.66 0.64 2.9 Shallow shelf 14.2 2.2 0.153 2.9 0.42 0.15 2.1 It should be noted that taking into account the details of the geological structure of sedimentation cycle deposits at the level of principal models is necessary for understanding sedimentation processes on the structures surrounding the Ugut-Kinyamin Uplift Zone.

The findings demonstrate that the primary aggregation of nanocrystalline TiO2 is primarily responsible for the large number of nanoparticles with homogenous morphology, spherical form, and different caves.
This is because SEM enables us to acquire particle sizes that may consist of two or more crystallite grains, while XRD offers the crystallite diameter [19].
The pollutant concentration influences the photocatalytic activity of photocatalysis; the large number of free active sites at low concentrations causes the reaction rate to increase significantly due to surface phenomena.

MIMO technology can significantly enhance channel capacity by linearly increasing the number of antennas without requiring additional frequency spectrum [7].
Several UWB antenna designs with basic geometric shapes like rectangles, circles, ellipses, polygons and exponential curves or a mix of these [14-18], P shape monopole antenna with multimode resonator band pass filter [19], hexagonal slot in a rectangular step shape patch with partial ground plane [20], grain rice shape antenna with split ring resonator[21], jug-shaped radiator fed by a coplanar waveguide (CPW) technique[22], circular ring monopole antenna with semi-circular stubs to enhance the bandwidth[23].
Number of works has been carried out in the past, in which researchers tries to evolve UWB antenna with sufficient isolation in the entire range by utilizing the above mentioned techniques which includes Ultra-wideband Antenna in the range of 4.1-6.58 achieved high isolation by using Bipolar Yagi based Structure with high gain by using Rogers (which is less economically) with large area [34], single band antenna with compact size [35,36], multiband and wideband two-port MIMO antenna [37,39], UWB MIMO with radiating elements [37], dual band swastika slot rectangular patch [38].

The specialty of carbon is that the ability of forming infinite number of various structures having various physical properties of material.
The surface morphologies and topologies were observed using Scanning Electron Microscope (SEM, Tescan Analytics, Vega 3, France), Energy Dispersive X-ray Spectroscopy (EDX, Oxford Instruments, UK) and Raman spectroscopy (HORIBA Jobin Yvon, UK) was utilized to verify the number of layers of the graphene formation and also the quality by determination of the defects arise from the process.
Furthermore, the existence of the D band depicts that there are defects either in terms of basal plane defects or edge defects or grain boundary [32],[33].

One possible explanation for this phenomenon is that the TiO2 grains are more isolated from one another when a smaller-size SiO2 is used, so that interparticle recombination and/or trapping of photoproduced charge carriers is more restricted.
They are consistent with hole scavenging by propan-2-ol, which reduces kr; if the irradiation was pursued, the number of mobile electrons in each TiO2 particle increased gradually.
This ranking was [13]: PC500 (317) > PC105 (85-95) > PC50 (54) > PC10 (10) where the numbers in parentheses indicate the surface area, S, in m2 g -1. 340 360 380 400 420 0.0 0.2 0.4 0.6 0.8 1.0 TiO2 normalized absorption λλλλ (nm) PC10 PC50 PC105 PC500 0 20 40 60 80 100 Normalized emission of the lamp (%) Figure 2.

., rapid diffusion along grain boundaries between phases
(2) Only a limited number of probes having favorable nuclear parameters are available for measurements.
A small number of more exotic probes are available using online facilities such as ISOLDE at CERN that can produce and implant PAC isotopes having short-lived parent states [21]

Introduction Natural graphite is divided into crystalline graphite (flaked graphite) and aphanitic graphite (microcrystalline graphite) according to its grain size and crystallinity [1].
In order to study the removal of impurities in the sample after alkali fusion and acid hydrolysis, the number of times of sulfuric acid leaching was increased to 3 times, and a comparative study was conducted.
According to the obtained carbon content data, it can be concluded that the number of times of acid leaching has little effect on the ash content, and the acid leaching of hydrofluoric acid plays an important role in whether the carbon content can exceed 99.9%.

The work by Xu et al.[31]in 1988 examined recrystallization and grain growth behavior of pre-worked titanium plate when exposed to long durations of low current electricity.
The observed variation in materials flow stress and deeper studies on materials behavior have permitted to develop theoretical and experimental relationship explaining EPE during plastic deformation, mainly concerning interactions between electrical flow and moving dislocations.Plastic deformation involves creation and interaction of dislocations and, as it occurs and proceeds, the number of dislocations increases, entanglingamong them and with other microstructural features; thus, an increasing force is required to continue deformation.
On the other side, the application of electric current causes electron motion, whose entity depends on material resistivity; since the number of defects increases as deformation proceeds, the material resistance to electrical flow also increases, increasing resistivity.