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Online since: April 2024
Authors: Ahmed Elwardany, Hassan Shokry, Prince Oppong Amoh, Manabu Fujii
Amongst the vast number of metal oxide semiconductors, i.e.
The band positioning and peak numbers are greatly influenced by morphological characteristics and the chemical constitution of the as-synthesized nanopowders [46].
Nanoparticles with substantially finer grain particles can be spotted in Fig.6b, indicating the successful synthesis of pristine SnO2.
Fig. 6c shows relatively larger grain-sized particles with wider pore sizes are observed.
This minimizes the number of bonded electrons that can be detached from the oxygen molecules for higher gas response occurrence.
The band positioning and peak numbers are greatly influenced by morphological characteristics and the chemical constitution of the as-synthesized nanopowders [46].
Nanoparticles with substantially finer grain particles can be spotted in Fig.6b, indicating the successful synthesis of pristine SnO2.
Fig. 6c shows relatively larger grain-sized particles with wider pore sizes are observed.
This minimizes the number of bonded electrons that can be detached from the oxygen molecules for higher gas response occurrence.
Online since: February 2016
Authors: Yan Jing Li, Yong Li, Jia Lin Sun, Ji Li Zhang, Hao Bo Zhang, Shuo Cao, Chang He Gao, Yong Qiang Sun
When the crystal particles continuous grain growth end, high-alumina bauxite creep into the steady–state creep stage, the creep rate is constant.
As the surface of corundum grain wetting and covered by liquid phase, the direct combination between particles get destroyed and form the low fusion phase continuous network which greatly weaken the combinations which along with the particle boundary as can be seen in Fig.3-c.
As the surface of corundum grain wetting and covered by liquid phase, the direct combination between particles get destroyed and form the low fusion phase continuous network which greatly weaken the combinations which along with the particle boundary as can be seen in Fig.3-c.
Online since: November 2012
Authors: György Z. Radnóczi, Lucie Bačáková, Imre Bertóti, Marta Vandrovcová, Katalin Balázsi, François Davin, Csaba Balázsi
The number of initially adhering cells on day 7 after seeding was significantly higher on the TiC surface than on the control culture dishes.
In films produced by physical deposition methods the nanosize of the crystalline grains is ensured by the formation of a continuous covering layer of the (amorphous) matrix during growth, blocking the growth of the crystallites.
The growth dynamics of number of MG 63 cells on day 1, 3 and 7 after seeding.
The number of initially adhering cells on day 1 after seeding was lower on the TiC nanocomposites than on the control culture dishes.
The differences in the numbers of the MG 63 cells in the grooves and on the prominences gradually disappeared towards day 7 of cultivation.
In films produced by physical deposition methods the nanosize of the crystalline grains is ensured by the formation of a continuous covering layer of the (amorphous) matrix during growth, blocking the growth of the crystallites.
The growth dynamics of number of MG 63 cells on day 1, 3 and 7 after seeding.
The number of initially adhering cells on day 1 after seeding was lower on the TiC nanocomposites than on the control culture dishes.
The differences in the numbers of the MG 63 cells in the grooves and on the prominences gradually disappeared towards day 7 of cultivation.
Online since: February 2013
Authors: Sheng Zhu, Guo Feng Han, Wen Bo Du, Xiao Ming Wang
Chromium tends to segregate at the inter-dendrite grain boundary.
To estimate the mixing entropy change per mole during the formation of a solid solution from n elements with equiatomic ratio is given by Boltzmann’s hypothesis[3], ignoring the positive contribution of atom vibration and electromagnetic moment of force to the mixing entropy: (1) where ΔSconf is the configurational entropy; k is the Boltzmann constant; w is the number of mixed states, and R is the gas constant.
According to this equation, there is a rising tendency for the mixed entropy of the multicomponent alloys when increasing the number of constituent elements.
Otherwise, the addition of minor alloy element, such as, B, C, N, Si, etc, extends largely the number of possible alloys.
Particularly, the number of phases(P) was less than (n+1) that of traditional alloys in equilibrium freezing, opposed to the classical Gibbs phase rule, as is attributed to high mixed entropy effect[21].
To estimate the mixing entropy change per mole during the formation of a solid solution from n elements with equiatomic ratio is given by Boltzmann’s hypothesis[3], ignoring the positive contribution of atom vibration and electromagnetic moment of force to the mixing entropy: (1) where ΔSconf is the configurational entropy; k is the Boltzmann constant; w is the number of mixed states, and R is the gas constant.
According to this equation, there is a rising tendency for the mixed entropy of the multicomponent alloys when increasing the number of constituent elements.
Otherwise, the addition of minor alloy element, such as, B, C, N, Si, etc, extends largely the number of possible alloys.
Particularly, the number of phases(P) was less than (n+1) that of traditional alloys in equilibrium freezing, opposed to the classical Gibbs phase rule, as is attributed to high mixed entropy effect[21].
Online since: July 2011
Authors: Guo Qi Wei, Yu Zhou, He Kun Guo, Yu Juan Zhang
With the lower gravel level, the number of holes and fractures decline. 2) Most volcanic rocks develop holes; some of them develop big holes or lots of holes.
Introduction Recently, a large number of particular lithology reservoirs, such as volcanic rocks and conglomerate, have been discovered with remarkable amount of oil and gas storage [1-5].
Currently available CT core analysis methods include visual CT image analysis, CT number analysis, CT number isogram, and CT re-sampling method [6].
Low gravel level sandstones such as fine-grained sandstone and siltstone do not contain fractures.
With the lower gravel level, the number of holes decline.
Introduction Recently, a large number of particular lithology reservoirs, such as volcanic rocks and conglomerate, have been discovered with remarkable amount of oil and gas storage [1-5].
Currently available CT core analysis methods include visual CT image analysis, CT number analysis, CT number isogram, and CT re-sampling method [6].
Low gravel level sandstones such as fine-grained sandstone and siltstone do not contain fractures.
With the lower gravel level, the number of holes decline.
Online since: April 2021
Authors: Ari Wibowo, Ardi Nugroho, Putri Akromah, Zahrotun Nafiah
From homogeneity testing, it was found that the five formulations were completely mixed and homogeneous, there were no lumps or coarse grains, and there was no separation between oil and other components of the material.
Testing the total plate number is one of the quality testing requirements required by SNI 2588 in 2017, the allowed ALT value is ≤ 1x10³.
The total plate number was tested in duplo with three dilutions namely 10-1, 10⁻², 10⁻³.
Formulation 2 was used in testing the total plate number with a concentration of VCO 32.5% and castor oil 12.5%.
Formula 2 with a VCO concentration of 32.5% and castor oil 12.5% was used in testing the total plate number (ALT) with the result that no contamination was found in the media.
Testing the total plate number is one of the quality testing requirements required by SNI 2588 in 2017, the allowed ALT value is ≤ 1x10³.
The total plate number was tested in duplo with three dilutions namely 10-1, 10⁻², 10⁻³.
Formulation 2 was used in testing the total plate number with a concentration of VCO 32.5% and castor oil 12.5%.
Formula 2 with a VCO concentration of 32.5% and castor oil 12.5% was used in testing the total plate number (ALT) with the result that no contamination was found in the media.
Online since: October 2010
Authors: Volker Wesling, Mirjam Kessler, Antonia Schram
Table 4: Applied brazing fillers, by manufacturer's instruction
material number
melting range
[°C]
ultimate tensile
strength Rm
[MPa]
yield strength
Rp0.2
[MPa]
CuSi3Mn1 2.1461 910 - 1025 340 - 460 > 120
CuAl7 2.0921 1030 - 1040 380 - 450 180
CuSn6+P 2.1020 910 - 1040 > 260 > 150
Fig. 6: Overview of a brazed joint and its heat-affected-zone (HAZ); HCT600XD, CuSi3Mn1; scale
100 and 200 µm
Boundary base
material / filler
HAZ: fine-grained zone /
coarse-grained zone
HAZ: coarse-grained zone
Length of HAZ
Test parameters.
At this for cyclic loading critical region the coarse grained zone, the fine-grained region, and the unaffected material is closely located.
At this for cyclic loading critical region the coarse grained zone, the fine-grained region, and the unaffected material is closely located.
Online since: April 2015
Authors: Oldřich Kodym, Pavel Staša
The number of measures to gradually reduce risk has been taken to protect the population.
If the Reynolds number drops below 1 during the liquid leakage, it means that the measurement is not taken in laminar but turbulent flow.
Reynolds number is the ratio between inert forces and viscous forces.
For porous materials, it is expressed as follows: Re=ρ∙v∙d50μ (3) Where: ρ = density of the liquid [g/m3]; ν = flow velocity [m/s]; d50 = mean of the size of rock grains μ = dynamic viscosity [Pa∙s] To meet the conditions of Darcy’s law, the fluid must be in a viscous flow.
[11] STAŠA, P., CHOVANCOVÁ, K., KEBO, V., CHOVANEC, J., KODYM, O.: Research of CO2 Storage Possibilities to the Underground; Procedia Earth and Planetary Science – Volume 6, 2013; pages: 14-23, ISSN: 1878-5220; DOI: 10.1016/j.proeps.2013.01.002 [12] STAŠA, P., KEBO, V., FUCHSÍKOVÁ, P., KUBÁČ, L.: Modelling potential action for building protection against flow of methane from the underground using the Fluent software; Proceedings of the 13th International Carpathian Control Conference (ICCC), High Tatras, Podbanské, Slovak Republic, 2012; IEEE Catalog number: CFP1242L-CDR; ISBN: 978-1-4577-1866-3 [13] KEBO, V., STAŠA, P., BENEŠ, F.: Application of CFD programs and supercomputing in mining.
If the Reynolds number drops below 1 during the liquid leakage, it means that the measurement is not taken in laminar but turbulent flow.
Reynolds number is the ratio between inert forces and viscous forces.
For porous materials, it is expressed as follows: Re=ρ∙v∙d50μ (3) Where: ρ = density of the liquid [g/m3]; ν = flow velocity [m/s]; d50 = mean of the size of rock grains μ = dynamic viscosity [Pa∙s] To meet the conditions of Darcy’s law, the fluid must be in a viscous flow.
[11] STAŠA, P., CHOVANCOVÁ, K., KEBO, V., CHOVANEC, J., KODYM, O.: Research of CO2 Storage Possibilities to the Underground; Procedia Earth and Planetary Science – Volume 6, 2013; pages: 14-23, ISSN: 1878-5220; DOI: 10.1016/j.proeps.2013.01.002 [12] STAŠA, P., KEBO, V., FUCHSÍKOVÁ, P., KUBÁČ, L.: Modelling potential action for building protection against flow of methane from the underground using the Fluent software; Proceedings of the 13th International Carpathian Control Conference (ICCC), High Tatras, Podbanské, Slovak Republic, 2012; IEEE Catalog number: CFP1242L-CDR; ISBN: 978-1-4577-1866-3 [13] KEBO, V., STAŠA, P., BENEŠ, F.: Application of CFD programs and supercomputing in mining.
Online since: January 2020
Authors: O.A. Fomina, Andrey Yu. Stolboushkin
The number of transition layers in the contact zone between the clay shell and the core from coal wastes is determined.
By plastic properties, the crushed coal waste is low plastic (the plasticity number is ≈ 6.0); on drying properties – insensitive to drying (coefficient of sensitivity to drying <1); according to the degree of caking – non-caking raw materials.
The distribution of the number of both components among themselves at the “shell–core” boundary integrally varies from 100 to 0% and otherwise.
The composition of the raw components of the layers of the model sample Raw material The content of the component in the charge [%], sample layer number [No] 1 2 3 4 5 Coal waste – 25 50 75 100 Clay 100 75 50 25 – It has been organized the directional heat and mass transfer inside the sample by analogy with model samples from iron ore wastes [24] during firing.
Selivanov, Modeling of the Structure and Strength Evaluation of Building Ceramics from coarse-grained Masses, Construction materials 6 (2007) 65–68
By plastic properties, the crushed coal waste is low plastic (the plasticity number is ≈ 6.0); on drying properties – insensitive to drying (coefficient of sensitivity to drying <1); according to the degree of caking – non-caking raw materials.
The distribution of the number of both components among themselves at the “shell–core” boundary integrally varies from 100 to 0% and otherwise.
The composition of the raw components of the layers of the model sample Raw material The content of the component in the charge [%], sample layer number [No] 1 2 3 4 5 Coal waste – 25 50 75 100 Clay 100 75 50 25 – It has been organized the directional heat and mass transfer inside the sample by analogy with model samples from iron ore wastes [24] during firing.
Selivanov, Modeling of the Structure and Strength Evaluation of Building Ceramics from coarse-grained Masses, Construction materials 6 (2007) 65–68
Online since: April 2022
Authors: Bose Mosunmola Edun, Philip Babalola, Oluseyi O. Ajayi
The loss in revenue was calculated using the variation of number of failure with time, as obtained from hammer mill.
The mill wear is measured indirectly by the number of fines produced which dictates the degree of attrition.
Fig 2 A graphical plot of number of failure (n) and the revenue loss (Dollar) within a year Figure 2 depicts the variation of the plot of number of failure from the period of the months that the failure occurred.
The loss in revenue was calculated using the variation of number of failure with time, as obtained from hammer mill.
Liu, The impacts of hammer-mill screen size and grain particle size on the performance of broiler chickens offered diets based on two red sorghum varieties, British poultry science. 60,3(2019) 209-218
The mill wear is measured indirectly by the number of fines produced which dictates the degree of attrition.
Fig 2 A graphical plot of number of failure (n) and the revenue loss (Dollar) within a year Figure 2 depicts the variation of the plot of number of failure from the period of the months that the failure occurred.
The loss in revenue was calculated using the variation of number of failure with time, as obtained from hammer mill.
Liu, The impacts of hammer-mill screen size and grain particle size on the performance of broiler chickens offered diets based on two red sorghum varieties, British poultry science. 60,3(2019) 209-218