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Online since: November 2015
Authors: Lei Li, Wei Wang, Yong Jing Jiang, Da Pu Shen, Hong Song Wang, Rui Wang
Data were acquired at 1 min intervals and the ambient temperature for the measurement was 30 °C.
By dry curing method, the compressive strength of mortars with WPU1 was reduced obviously from 28.9 MPa to 18.8 MPa at 3 days, and the reduction in compressive strength narrows with the curing time at 7 days and 28 days.
From the results in Figure 1 and 2, it can be seen that WPU2 with high tensile strength can help to improve the mechanical performance especially by dry curing method, while WPU1 with low tensile resistance shows the a reduction in strength.
Online since: May 2016
Authors: Albert A. Burk, Michael J. Paisley, R.T. Leonard, Joseph J. Sumakeris, Adrian R. Powell, Eugene Deyneka, Yuri Khlebnikov, Chris Horton, Jeff Seaman, M. O’Loughlin, J.Q. Guo, Michael Dudley, Elif Balkas, Sumit Gangwal, Jyothi Ambati, Andy McClure, Olek Kramarenko, Varad Sakhalkar, V. Tsevtkov
., much of this development has been driven by the demand from Cree’s commercial LED product line, which requires high quality SiC substrates for cost reduction and capacity increase benefits.
To make the most out of the dramatic improvement in BPD density that epitaxial growth accomplishes, and to reduce the TED density in the epilayer, a reduction of the substrate BPD density is desirable.
Fig. 7. a) Lasertec generated map of an etched wafer where each BPD pit is highlighted as a dot, b) the same data converted into a contour map showing local BPD densities.
Online since: October 2008
Authors: Daniel Eylon, William A. Ernst, Daniel P. Kramer
Unfortunately, none of the three needed advantages was substantialenough to encourage the aerospace designers to switch from wrought metallurgy to PM, in spite of the very substantial R&D activities in the Ti PM area for more than two decades [6].The development and introduction of the Armstrong Process titanium and titanium alloy powders by Na continuous reduction [7], (unlike the Hunter process which is a batch process) have introduced new opportunities for gaining substantial advantages over titanium wrought metallurgy due to the unique micron-size globular grain structure.Ultra-fine globular titanium grains allow significant cost advantage via lower temperature hot processing, improved superplastic-formability [8,9], and higher combinations of strength and ductility.The objective of this work was to establish if the ultra-fine powder grain structure could be preserved into a solid compact by using very short-term heating and high pressures in a vacuum hot press (VHP
These are compared to typical tensile data of CP-Ti Grade 2.
A schematic for producing an alloy sheet or foil from granulated titanium, a sodium reduction process [12].
Online since: August 2019
Authors: S. Neelavathi, C.L. Mahesh Kumar, K.G. Shwetha
Thus reduction causes extra torsion in building due to seismic waves in asymmetric pyramid structure.
Table 1 Detailed data of the building Structure Irregular Building with Shear wall and Bracing No. of Storey G+19 Storey Height First Storey 1.5 m Upper Storey 3.0 m Seismic zone V Material Properties Young’s Modulus of M40 Concrete, E 3.16X105 kN/m2 Grade of Concrete M40 Grade of Steel Fe500 Unit weight of reinforced concrete 25 kN/m2 Member Properties Thickness of slab 0.15m Beam size 0.3x0.45m Column size 0.6x0.6, 0.75x0.75 Thickness of shear wall 0.30m Live Load Intensities Roof 1.5 kN/m2 Floor 3.00 kN/m2 Floor finishes 1.5 kN/m2 Fig. 1 Plan View of Rectangular and L shaped building The Models considered for study are Model 1 – Regular building without shear wall.
The results of Response spectrum analysis and static analysis are compared and concluded, that RSA has given lower values for displacement and drift, reduction of 23% was observed in RSA compared with ESA in both displacement and drift. 2.
Online since: June 2014
Authors: Mohammad Hayajneh, Mohammad D. AL-Tahat, Salman Alshobaki, Walid Khraisat
Reduction of the cycle time will improve the company ability to respond to varying customer demands [4, 8].
After the analysis of all the data and observations of the pattern making process, several factors can be considered to be taken by the planning and the pattern technology department and pattern shop to counter the effect of the varying products complexity levels and the wide variety of patterns in order to be able to compete with foundries and competitors.
GAZAL must find ways to continue to reduce labor content where possible, shorten lead-time, beat competitors with superior quality, Just In Time (JIT) delivery and services, respond rapidly to customer concerns, implement aggressive cost reduction, increased productivity, reduce scrap, and reducing overhead and spending.
Online since: October 2006
Authors: Yuichi Ikuhara, Takahisa Yamamoto, Byung Nam Kim, Taketo Sakuma, Keijiro Hiraga, Koji Morita, Hidehiro Yoshida
The present paper aims to briefly summarize our recent experimental data of the doping effect on the high temperature plastic flow in 3mol% Y2O3-stabilized TZP (3Y-TZP) and Al2O3, and to show that change in chemistry of grain boundaries is responsible for the doping effect.
This result suggests that TiO2, AlO1.5 or GeO2-doping results in reduction of the ionicity in TZP, and hence the flow stress is reduced by the ionic bond reduction.
Online since: March 2011
Authors: Chun Ping Wang, Ying Ju Liu, Hong Tao Lei, Jie Dan Zhou, Yi Bin Huang, Gen Quan Liang
Although PAH is a mixture, rather than a single compound, benzo(a)pyrene (BaP) may be adopted as a marker for the overall PAH mix, since the available monitoring data from a variety of locations show that this compound makes a consistent contribution to the total carcinogenic activity of the overall mixture of PAH[4].
The catalytic current was mainly due to the carried HRP on the secondary antibody toward the reduction of H2O2.
The oxidation peak reduced a little by the consumption in the content of QH, while the reduction peak raised dramatically by the increase in the content of Q. 3.4 Optimization of the immunosensor procedure The influence factors including the dilution ratio of antigen and primary antibody were discussed in detail.
Online since: July 2012
Authors: Yu Ping Li, Xiao Fang Pi, Yan Chun Gong, Xiang Yuan Xiong, Guang Jie Wu, Zi Ling Li, Hu Su
After 15 min of incubation at 37°C, the cell viability was measured using a MTT reduction assay.
Closure of KATP channels by glucose metabolism and a subsequent elevation in ATP relative to ADP, results in the reduction of K+ efflux from the cells, leading to depolarization of the plasma membrane and activation of voltage dependent Ca2+ channels.
In the basal state (no glucose challenge), there was no difference in ATP levels between without and with baicalin- or baicalein-treated cells (data not shown).
Online since: May 2005
Authors: Vito Raineri, Francesco La Via, Fabrizio Roccaforte, Sebania Libertino, Filippo Giannazzo, Corrado Bongiorno
Basing on the SCM results, it can be argued that the reduction of the carrier concentration is responsible of an increase of the Schottky barrier thickness, i.e. the depletion width, which in turn contributes to the experimentally observed decrease of the leakage current.
(b) High resolution TEM taken between the regions 1 and 2 of the Ti 0 1 2 3 4 10 16 10 17 10 18 as prepared 1x10 9 1x10 10 Concentation (cm -3 ) Depth (µm) Fig. 3: Carrier concentration profiles extracted from SCM raw data for the as prepared and for the irradiated Ti/4H-SiC Schottky diodes, demonstrating the dopant deactivation in the irradiated region of the epilayer.
In particular, the presence of deep levels in the irradiated material may be responsible for the free carriers reduction in the near-interface region observed by SCM.
Online since: May 2011
Authors: Yuan Gang Zu, Zhen Sun, Chun Hui Ma, Lei Yang, Rong Rui Zhang
At constant pressure circumstance, as the temperature was increased when passed 60 °C, the density of SC-CO2 was decreased, lead to a reduction in the solubility of ethanol and UA in the phase.
Data are expressed as means ± S.D.
The dramatic increase in drug dissolution rate and solubility can be explained by the reduction of particle size resulting in an increased specific surface area.
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