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Online since: November 2013
Authors: Cena Dimova
No significant reduction in ridge height from baseline was found with certain socket preservation interventions.
A reduction of about 50% in both horizontal and vertical directions has been observed over 12 months, with two-thirds of the reduction occurring in the first three months.
Van der Weijden et al [8] reported an average reduction in ridge width of 3.87 mm.
The percentage reduction was somewhat larger in the molar compared with the premolar region.
The data, however, were limited, and clinical significance could not be inferred.
Online since: January 2021
Authors: R. Würschum, Heinz Krenn, Gregor Klinser
If the cut-off potential of the charging cycle was chosen to be 4.2V, the oxidation processes of the subsequent discharging (inserting of Li-ions) are fully reversible: For LixNi1/3Mn1/3Co1/3O2 first Ni4+ is reduced to Ni3+ followed by the reduction of Ni3+ to Ni2+ and in the case of LixNi0.6Mn0.2Co0.2O2 an exclusive reduction of Ni4+ followed by a simultaneous reduction of Ni3+ and Co3+.
A closer consideration shows that discharging in NMC 1:1:1 results first in a simultaneous reduction of Ni4+ and O-ions followed by sole Ni3+ → Ni2+ reduction [2].
From this measurement it was concluded that the charge compensation process during charging/discharging in NaxV2(PO4)3 is solely due to V3+/V4+ oxidation/reduction.
A reduction of the positron lifetime can only be explained by vacancy reordering process, where the dimensionality of the defect is reduced.
Fig. 5: Change in positron lifetime Dt as a function of Li content x in LixNi1/3Mn1/3Co1/3O2 (data from three independent measurements).
Online since: May 2014
Authors: Zhen Zhou, De Zhong Ma, Yong Qing Jiang, Yong Xing Tong
According to monitoring data of xuefu road traffic noise pollution source in time and space distribution analysis, the roughly the time distribution and spatial distribution of xuefu road traffic flow.
By the overall analyzed monitoring data characteristic, the xuefu road traffic noise pollution is serious.
Effect of noise reduction current control measures is very limited.
Sampling measurement, use the upgrade, "slow" characteristics, each five seconds to read an A instantaneous sound level, 100 consecutive data are recorded at the same time, and paying attention to traffic flow.
More serious is the eleventh point, 100 groups of data of 90% is 75 dB.
Online since: October 2014
Authors: Septimiu Albetel, Vlad Martian, Mihai Nagi
Data reduction.
Data obtained from the test was reduced using the technique described by Wang et. al. in [11] with the help of the ϵ-NTU method.
Chi, Heat transfer and friction characteristics of plain fin-and-tube heat exchangers part I: new experimental data, Int.
[10] ASHARE Guideline 2, Engineering Analysis of Experimental Data, Atlanta, ASHARE (1986) [11] C.
Chi, Data reduction for air-side performance of fin-and-tube heat exchangers, Exp.
Online since: October 2010
Authors: Min Quan Kuang, Shan Xiang Zhang, Pei Xu
Substituting the above values into Eq. (1) and fitting the calculated results to the experimental data, we have ρ » 4 %
For comparisons, the observed EPR data for the similar tetragonal Cu2+ centers on the original trigonally distorted octahedral Cd2+ site [7] in CsCdCl3 and the octahedral interstitial site in the CdSe nanocrystals [18] are supplied in Table 1.
b The experimental data for the Cu2+ center on the Cd2+ site in CsCdCl3 [7].
c The experimental data for the Cu2+ center on the octahedral interstitial site in the CdSe nanocrystals [18].
Discussion One can find from Table 1 that the theoretical EPR parameters based on the relative elongation ratio ρ in Eq. (4) are in good agreement with the experimental data.
Online since: December 2012
Authors: Z. Nooraizedfiza, W. Rahman, M.Z.M. Zamzuri, M. Marina, K. Alir, Mohd Asri Selamat
The data obtained shows that the Fe-Y2O3 composites samples possessed superior hardness value with the increasing quantity of reinforcement compared to the unreinforced Fe composite.
From the experimental results observed in Figure 2, it shows that the presence of reinforcement particulates caused reduction of sintered densities.
This is supported by a study elsewhere that the addition of Y2O3 particulates as reinforcements into MMCs resulted on the reduction of grain size, which gives better mechanical properties than unreinforced matrix [10].
Experimental data showed that the hardness values increases while the density decreases with the increasing percentage of Y2O3 in the Fe-Y2O3 composites.
Online since: August 2007
Authors: Pavol Šajgalík, Zoltán Lenčéš, J. Křest'an
The corrosion resistance of sialons made from commercial powders (AlN, Al2O3 and Si3N4) and from powder precursor produced by carbothermal reduction and nitridation of raw aluminosilicate (pyrophyllite) in molten steel were investigated.
However, a search in commonly available literature quickly revealed that the data on this subject are rather scarce.
Experimental Two types of bulk sialon-based ceramic materials with parameter z = 3.7 were prepared: β-sialons made from commercial powders (AlN, Al2O3 and Si3N4) (C1) and from powder precursor produced by carbothermal reduction and nitridation of raw aluminosilicate, pyrophyllite with ideal composition Al2Si4O10(OH)2 (P1).
The neutron diffraction patterns of P1 and C1 sialons before the corrosion test shows, that sample C1 is in fact a pure β-sialon, while sample P1 contains also some amount of α-alumina and β-SiC. α-Al2O3 is a residuum of non reacted α-alumina from the starting mixture, and SiC is formed during the carbothermal reduction and nitridation of pyrophyllite powder [5].
Online since: March 2016
Authors: Miriam Kupková, Martin Kupka, Monika Hrubovčáková
The higher the porosity of a bar was, the higher relative reduction in bending stiffness the bar exhibited.
This contribution seeks to provide preliminary data on how the exposure to Hank’s solution affects the bending stiffness of bars from sintered Fe-Mn alloys.
Considering a material with a moderate porosity, the solid skeleton of which undergoes uniform corrosion at a rate no higher than a few hundreds of microns per year, and using Eq. 3 and Eq. 1, the following relation for the rate of reduction in the bending stiffness (Eq. 3) can be found (4) Here S is the real surface area of the sintered sample per unit exterior-geometric-surface area, Rcorr is the corrosion rate of the solid skeleton and A is the cross-sectional area of the bar.
According to Eq. 4, a higher porosity and less noble solid skeleton accelerate the reduction in bending stiffness of a bar.
Online since: December 2016
Authors: H. Hamasaki, Fusahito Yoshida, Toshiya Suzuki, Kazuo Okamura, Yuya Ishimaru
The effects of anisotropic yield functions on local reduction of thickness are evaluated.
In this Part-II, we numerically simulate the deformation of HSS sheet in circular hole expansion and evaluate the effect of anisotropic yield functions on the local reduction of thickness in HSS sheet.
In a condition of stress ratio σx:σy = 1:2 for JSH780R, the data wasn’t obtained because a fracture occurred even in the case of the plastic strain of 0.2%.
However in detail viewing, Hill48 predicted relatively less reduction of thickness in R.D.
Online since: April 2003
Authors: M.E. Bowden, G.Vaughan White, G.C. Barris, Ian William Murray Brown, Kenneth MacKenzie, C.M. Sheppard
Keywords: Powder synthesis, carbothermal reduction, solid state NMR, O1-sialon, oxidation, ion beam analysis, O-sialon refractories.
A Weibull plot of this data [12] shows that the results lie along a single line, indicating a single population of fracture determining flaws.
Differential Thermal Analysis (DTA) and Thermal Dilatometry data for �/�-sialon (not presented here) clearly indicated a major softening of the intergranular glass phase in this temperature zone, leading to greatly increased opportunity for oxygen transport through the body.
NRA data for isothermal studies undertaken at 1400°C show there is progressive thickening of the N-free layer, which is diffusion controlled by a parabolic rate law.
This observation is consistent with PIXE data for Y, Al, and Si [13].
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