Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: April 2010
Authors: Vladimir Skidanov
Gradual Fe concentration reduction
near preliminary contaminated slab surface and Fe concentration increase near opposite surface
were observed.
The presence of these impurities in silicon bulk leads to chip yield and reliability reduction.
This value is twice less than the Fe penetration value (~ 400 mcm) known from previously published data [1].
Exact account of averaging effect is complicated since the electron diffusion length L increases with every etching process due to Fe concentration reduction.
Data represented its concentration were calculated by simple subtraction of Fe concentration value from total recombination centers concentration.
The presence of these impurities in silicon bulk leads to chip yield and reliability reduction.
This value is twice less than the Fe penetration value (~ 400 mcm) known from previously published data [1].
Exact account of averaging effect is complicated since the electron diffusion length L increases with every etching process due to Fe concentration reduction.
Data represented its concentration were calculated by simple subtraction of Fe concentration value from total recombination centers concentration.
Online since: January 2012
Authors: V.P.W. Shim, Y.B. Guo, B. W. F. Tan
In terms of nano-particle addition, its influence on the mechanical properties are not notable; enhancement of the elastic modulus, yield stress and tensile strength are negligible, and there is a small reduction in ductility.
A, B, C and D in Fig. 3a) were drawn along the gauge section of the specimen and a high-speed camera operating at 100,000 frames/second was utilized to capture visual data on the specimen deformation.
With respect to nano-particle addition, for strain rates in the range of 0.0012-1000s-1, its effects on the Young’s modulus, yield stress and tensile strength are negligible; there is actually a small reduction in ductility.
However, considering that the experimental data for tests on the nanocomposite at 1600s-1 is limited, this observation remains to be substantiated by further tests.
The addition of nano-particles results in little influence on the mechanical properties of the alloy; enhancement of the Young’s modulus, yield stress and tensile strength is negligible, while there is a small reduction in ductility.
A, B, C and D in Fig. 3a) were drawn along the gauge section of the specimen and a high-speed camera operating at 100,000 frames/second was utilized to capture visual data on the specimen deformation.
With respect to nano-particle addition, for strain rates in the range of 0.0012-1000s-1, its effects on the Young’s modulus, yield stress and tensile strength are negligible; there is actually a small reduction in ductility.
However, considering that the experimental data for tests on the nanocomposite at 1600s-1 is limited, this observation remains to be substantiated by further tests.
The addition of nano-particles results in little influence on the mechanical properties of the alloy; enhancement of the Young’s modulus, yield stress and tensile strength is negligible, while there is a small reduction in ductility.
Online since: December 2024
Authors: V.C. Bringas-Rodríguez, D.L. Mayta-Ponce, Fredy Alberto Huamán-Mamani, G.P. Rodríguez-Guillén, D.E Camero-Carnero, Cris Katherin Palomino-Ñaupa
At 500°C, the cermets showed a small reduction in their mechanical performance.
Results and Discussion For the analysis of the mechanical results, some data on the Capirona and Capinuri precursor woods must be considered such as the basic density they present and their maximum resistance to compression in a direction parallel to the fiber.
Physical and mechanical data of interest of the study woods.
Both materials show a reduction in their maximum compressive strength, reaching values of approximately 594 MPa for the Capinuri cermet and 363 MPa for the Capirona cermet.
Furthermore, the reduction of stiffness is observed in the elastic zone, as well as a transition in the failure mode going from a brittle behavior at room temperature to a more ductile response, revealed with an initial linear stretch followed by an increase in resistance.
Results and Discussion For the analysis of the mechanical results, some data on the Capirona and Capinuri precursor woods must be considered such as the basic density they present and their maximum resistance to compression in a direction parallel to the fiber.
Physical and mechanical data of interest of the study woods.
Both materials show a reduction in their maximum compressive strength, reaching values of approximately 594 MPa for the Capinuri cermet and 363 MPa for the Capirona cermet.
Furthermore, the reduction of stiffness is observed in the elastic zone, as well as a transition in the failure mode going from a brittle behavior at room temperature to a more ductile response, revealed with an initial linear stretch followed by an increase in resistance.
Online since: June 2012
Authors: Zdeněk Šnirch
Bridge piers and abutments surface degradation reduction posibility
Snirch Zdenek1, a
1 Brno University of Technology, Faculty of Civil Engineering, Institute of Technology of Building Materials and Components, Veveri 95, 60200 Brno, Czech Republic
asnirch.z@fce.vutbr.cz
Keywords: coatings, bridge, concrete surface, degradation, service life, building material, thin film
Abstract.
Based on the data-set from daily running hours and average temperature of the environment during the years 2002 – 2006 it was possible to say, that one year consists of 120 – 150 temperature cycles, which equivalent to corrosion laboratory simulated freezing cycles are.
Based on the data-set from daily running hours and average temperature of the environment during the years 2002 – 2006 it was possible to say, that one year consists of 120 – 150 temperature cycles, which equivalent to corrosion laboratory simulated freezing cycles are.
Online since: December 2016
Authors: Mihaela Elena Ulmeanu, Elena Lupeanu, Anca Iovita, Rodica Hnidei
The results showed significant reduction in the ability to carry out basic activities of daily living (ADL) in patients aged 80 - 90+ years compared to patients aged 45-59 years (p = 0.05) and those of 60-69 years old (p = 0.043).
Patients older than 80 years showed significant reduction ability to conduct IADLs compared to patients aged 45-59 years (p = 0.0047), aged 60-69 years (p = 0.0049) and aged 70-79 years (p = 0.029).
Data analysis Statistical analysis of results was done using Microsoft Office Excel program.
Results and discussions The results revealed significant reduction in the ability to carry out basic activities of daily living (ADL) in patients in the age group 80 - 90+ years compared to patients belonging 45-59 years age group (p = 0.050) and 60-69 years group (p = 0.043), see Table 1.
Patients older than 80 years showed significant reductions ability to conduct complex activities of daily living compared to patients aged 45-59 years (p = 0.0047), aged 60-69 years (p = 0.0049) and aged 70-79 years (p = 0.029), see Table 1.
Patients older than 80 years showed significant reduction ability to conduct IADLs compared to patients aged 45-59 years (p = 0.0047), aged 60-69 years (p = 0.0049) and aged 70-79 years (p = 0.029).
Data analysis Statistical analysis of results was done using Microsoft Office Excel program.
Results and discussions The results revealed significant reduction in the ability to carry out basic activities of daily living (ADL) in patients in the age group 80 - 90+ years compared to patients belonging 45-59 years age group (p = 0.050) and 60-69 years group (p = 0.043), see Table 1.
Patients older than 80 years showed significant reductions ability to conduct complex activities of daily living compared to patients aged 45-59 years (p = 0.0047), aged 60-69 years (p = 0.0049) and aged 70-79 years (p = 0.029), see Table 1.
Online since: January 2012
Authors: Subrata Mallik, Biswasi Sunita Minz, Basudev Mishra
Computer display showing Spray Cooling Data in Caster 1
Casting.
The slab was reduced in thickness from about 200mm to 35mm in several reductions of typically 20% or more.
The parameters such as strain, inter pass time and strain rate varied in the range of 0.3-0.4, 1.5-2.5 sec and 30-55/sec respectively (the level –III automation in Hot Strip Mill calculates and saves the data online during rolling in the data server).
Using process parameters such as temperature, reduction ratio, strip speed, strain, inter pass time and strain rate and chemical analyses, the main characteristics in a steel grade, the yield strength, the tensile strength, (uniform) elongation and low temperature impact-toughness were ascertained.
Using process parameters such as temperature, reduction ratio, strip speed, strain, inter pass time and strain rate and chemical analyses, the main characteristics in a steel grade, the yield strength, the tensile strength, (uniform) elongation and low temperature impact-toughness were ascertained.
The slab was reduced in thickness from about 200mm to 35mm in several reductions of typically 20% or more.
The parameters such as strain, inter pass time and strain rate varied in the range of 0.3-0.4, 1.5-2.5 sec and 30-55/sec respectively (the level –III automation in Hot Strip Mill calculates and saves the data online during rolling in the data server).
Using process parameters such as temperature, reduction ratio, strip speed, strain, inter pass time and strain rate and chemical analyses, the main characteristics in a steel grade, the yield strength, the tensile strength, (uniform) elongation and low temperature impact-toughness were ascertained.
Using process parameters such as temperature, reduction ratio, strip speed, strain, inter pass time and strain rate and chemical analyses, the main characteristics in a steel grade, the yield strength, the tensile strength, (uniform) elongation and low temperature impact-toughness were ascertained.
Online since: March 2013
Authors: Xin Wang Xu, Xiao Qin He, Ju Feng Zhen
Soil microbial biomass carbon and dissolved organic carbon has a significantly reduction after natural marsh wetland reclamation for farmland, and a significantly increased trend after reforestation and conversion from cropland to wetland [6].
The choice of the wetland use patterns to make soil carbon fixation and CO2 gas emissions by a minimum is the key for reasonable protection wetlands and reduction greenhouse gas emissions.
Because of the region as an important agricultural product base, with the development of economy, the local wetland is facing the huge pressure and area continuously reduction [15].
In order to ensure comparability of data, the location of the observation points are as close as possible, wetland test point (N30 ° 38.323 '; E117 ° 33.328'; H16m; estimation error 11m), dry land test point (N30 ° 38.334 '; E117 ° 33.338'; H20m; estimation error 6m), paddy field test point (N30 ° 38.325 '; E117 ° 33.333'; H17m; estimated errors 8m) and horizontal distance of less than 20m.
In the monitoring process, first, remove the growth plants of measurement point surface, open the fan in the sealed box, then take the open end of the sealed box to bury in soil 5cm depth, quickly open the instrument to read the CO2 concentration data (X0, unit: ppm) as an initial value and 5min after the reading data (Xt, unit: ppm) as immediate values.
The choice of the wetland use patterns to make soil carbon fixation and CO2 gas emissions by a minimum is the key for reasonable protection wetlands and reduction greenhouse gas emissions.
Because of the region as an important agricultural product base, with the development of economy, the local wetland is facing the huge pressure and area continuously reduction [15].
In order to ensure comparability of data, the location of the observation points are as close as possible, wetland test point (N30 ° 38.323 '; E117 ° 33.328'; H16m; estimation error 11m), dry land test point (N30 ° 38.334 '; E117 ° 33.338'; H20m; estimation error 6m), paddy field test point (N30 ° 38.325 '; E117 ° 33.333'; H17m; estimated errors 8m) and horizontal distance of less than 20m.
In the monitoring process, first, remove the growth plants of measurement point surface, open the fan in the sealed box, then take the open end of the sealed box to bury in soil 5cm depth, quickly open the instrument to read the CO2 concentration data (X0, unit: ppm) as an initial value and 5min after the reading data (Xt, unit: ppm) as immediate values.
Online since: May 2011
Authors: Yong Yao, Hua Wen, Ru Heng Wang, Yue Ming Wang
Fig. 3 Layout of drainage sand well Fig. 4 Vacuum degree of vacuum drainage
Experimental phenomena and data analysis
Settlement analysis
Both tests used electro-osmotic method and vacuum preloading method respectively, settlement of soil material is observed by measuring tape attach to external wall.
According to field test and settlement data, here lists the settlement characteristic: surface settlement in the two tests is uneven.
According to the data, the spatial distribution of inner soil material is uneven by different drainage methods.
From table 5, we can see that the average water content of upper anode is the smallest and the same goes to amplitude reduction of water content in electro-osmotic test.
Its concrete manifestation is decline of water content, reduction of void ratio and enlargement of density.
According to field test and settlement data, here lists the settlement characteristic: surface settlement in the two tests is uneven.
According to the data, the spatial distribution of inner soil material is uneven by different drainage methods.
From table 5, we can see that the average water content of upper anode is the smallest and the same goes to amplitude reduction of water content in electro-osmotic test.
Its concrete manifestation is decline of water content, reduction of void ratio and enlargement of density.
Online since: December 2012
Authors: Sławomir Kciuk, Paweł Martynowicz, Arkadiusz Mężyk
Introduction
The demands addressed to the modern vehicle suspension systems include resonance vibrations reduction and ensuring drive stability during extreme manoeuvres, while maintaining good high-frequency isolation properties, under various road conditions and limited suspension clearance.
The significant reduction in the yield stress (thus controlled pressure drop) may be observed for the values of dwell time below 1 ms.
The analysis of MR fluid flow regime in the valve has to be verified experimentally owing to approximations in models of MR fluids dynamics as well as scatter of fluid data given by the manufacturer.
Despite the fact that critical Reynolds number of suspensions is usually lower than that of homogenous mixtures, the small solid particles covered with surfactants and substances improving lubricity (reduction of friction and the flow vorticity) may result in pressure drop reduction and increase of the critical Reynolds number.
Martynowicz: Special application magnetorheological valve numerical and experimental analysis, Diffusion and Defect Data – Solid State Data.
The significant reduction in the yield stress (thus controlled pressure drop) may be observed for the values of dwell time below 1 ms.
The analysis of MR fluid flow regime in the valve has to be verified experimentally owing to approximations in models of MR fluids dynamics as well as scatter of fluid data given by the manufacturer.
Despite the fact that critical Reynolds number of suspensions is usually lower than that of homogenous mixtures, the small solid particles covered with surfactants and substances improving lubricity (reduction of friction and the flow vorticity) may result in pressure drop reduction and increase of the critical Reynolds number.
Martynowicz: Special application magnetorheological valve numerical and experimental analysis, Diffusion and Defect Data – Solid State Data.