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Online since: May 2006
Authors: Luís Pereira, Pedro Barquinha, Elvira Fortunato, Rodrigo Martins
Complementing the XRD data with SE results (Fig. 1b), where the imaginary part of the dielectric function for large grain and fine grain poly-Si references are plotted, it is possible to deduce that the grains become smaller as the Ni layer thickness increases.
There, it is possible to see that despite being polycrystalline the samples prepared using 1 nm and 2 nm of Ni present a lower ε2 value and a reduction of the direct transition peaks intensity, as it also occurs for fine grain poly-Si reference. 20 30 40 50 60 a) <311> <220> <220> <220> <111> <111> <111> 2 nm 0.5 nm 1 nm Intensity (a.u.) 2 theta (degrees) 2.5 3.0 3.5 4.0 4.5 5.0 5 10 15 20 25 30 35 40 45 2 nm 1 nm 0.5 nm large grain reference b) εεεε2 Energy (eV) small grain reference Figure 1: Structural characterization of the crystallized samples: a) XRD data and b) SE data showing large and small poly-Si references The use of thick Ni films is responsible by the increase of the Ni density leading to the formation of more NiSi2 crystallites that act as nucleation sites [6].
The Ion/Ioff ratio obtained was of the order of 5.5×10 4, which can be still improved (at least one order of magnitude) by proper reduction of Ioff.
When the thickness of the Ni layer increases, this leads to the formation of smaller grains and to films with an increase on the metal's contamination, leading to degradation on the electrical characteristics of the TFTs, as can be seen by the data shown in table 1.
The data show that the device works in the enhancement mode and it presents a very good hard saturation current.
Online since: July 2016
Authors: Jolanta Baskutiene, Robertas Zakrasas, Vytautas JURENAS
The obtained experimental data showed the decrease in the drilling temperatures of the vibrated bone samples, as compared to the conventional drilling.
Ambient Sample 6, 50Hz, 1200rpm Time, s Time, s - 34 Tmax, °C Tmax, °C 18.4 62.4 Fig. 2 Example of the thermographic imaging data: a) initial adjustment prior to the start of the drilling experiment; b) PMMA drilling experiment Obtained results were analyzed and vibration parameters, which showed the desirable effect, considering the temperature, were chosen for the second phase of the experiments, i.e. for the low frequency vibration assisted drilling of the bovine bone samples (Table 3).
First experiment involved the PMMA sample drilling aiming to obtain vibration parameters that show the highest reduction in drilling temperature.
The experimental data was gathered and analyzed.
Obtained results showed 14% reduction in drilling temperatures of the vibrated bone samples if compared to the conventional drilling without vibratory excitation.
Online since: August 2015
Authors: Amran Ahmed, Sazali Yaacob, Muhd Hafizi Idris, Md Azlin Md Said, Shamshul Bahar Yaakob, Mohd Zamri Hasan
This paper presents the analysis of the attitude condition of RazakSAT based on ADS data.
This paper represents analysis the condition of RazakSAT based on attitude sensor of attitude determination system data.
Result and Discussion The ADS measurement data of RazakSAT provided by ATSB are given Table 2.
Gyroscopes Summary This paper presents the analysis of attitude determination system based on RazakSAT data.
RazakSAT ADS data measurement results show that the satellite is in detumbling mode.
Online since: May 2012
Authors: Zheng Wen Huang, Chun Wu, Ao Yuan
Finally, put forward some suggestions to provide a reference for the reduction, recycle and safe treatment of MSW in Nanchong City.
By analyzing the historical data, the population in main urban areas increased gradually, there was a linear relationship between the population and the time (year).
Based on the analysis on the data over the years in Nanchong city, it found that the per capita consumption expenditure was significant positive correlated with the time(year).
However, the output of MSW was also influenced by personal qualities, environmental awareness, waste reduction measures and management system and other factors. 
The government should improve the public awareness of environmental protection, strengthen waste reduction, resource and market-orientation operation, to reduce the output of MSW through some appropriate approaches, such as the garbage classification, levying waste disposal fees. 
Online since: July 2014
Authors: T. Micha Premkumar, M.A. Ashish, T. Banu Prakash, D. Thulasiram
The main aim of this investigation is to predict complex flow mechanism like separation and recirculation around the turbine blades and subsequently reduction in torque coefficient at higher flow rate.
Further, Torresi et al. [5] evaluate the tip clearance effects and secondary flow losses in Wells turbuine that contribute major effect to reduction of the peak load efficiency.
The validation of numberical simulation has been done by comparing the experimental data[10] and numberical result of torque coefficient T* for particular flow coefficient U* of 0.22 as shown in Table 1.
The grid sensitivity study has been done along with comparison to the experimantal available data, with this confident CFD simulation has been proceded with our geomentry.
Further, its has favourable effect on its increasing in turbine performance by reduction in pressure drop.
Online since: December 2010
Authors: Matthias Göken, Heinz Werner Höppel, Christian W. Schmidt, Catharina Knieke, Verena Maier, Wolfgang Peukert
The presence of particles on the surfaces lead to a reduction of the actual metal to metal contact area during roll bonding, hindering the native metal surfaces to come into direct contact and to join by cold welding.
The rolling conditions include thickness reduction, diameter of the rolls, rolling load, speed and temperature.
Here rolling and surface conditions were kept equal for all samples applying a nominal thickness reduction of 50 % and acetone cleaning and scratch brushing for surface treatment.
A dependence on particle material and diameter cannot be identified from the available data.
Summary It was shown that nanoparticle insertion in accumulative roll bonded materials reduces bond strength by an effective reduction of the metal to metal bonding area during the formation of a cold weld.
Online since: January 2010
Authors: Krzysztof Wierzbanowski, Brigitte Bacroix, Sebastian Wroński, Mirosław Wróbel, M. Wroński
Experimental procedure Samples of the commercial low carbon steel (size of 2.5*30*60 mm3) were symmetrically and asymmetrically rolled on the laboratory mill with 25 % reduction in thickness.
The experimental pole figure data were used next to calculate the orientation distribution functions (ODF) [3].
The variation of the applied stress (Σij) during rolling (input data in LW model) was determined by FEM (ABAQUS software) using: E=210 MPa (Young modulus), ν=0.3 (Poisson coefficient) and f=0.25 (friction coefficient).
Results for symmetric and asymmetric rolling with ω1/ω2 = 1.04 are shown (rolling reduction is 25%).
Rolling reduction was 25 %.
Online since: October 2013
Authors: Saad Ahmed
The main task of their work is to increase the knowledge and the amount of available data to characterize rotating stall phenomena.
Figure 5 shows the percentage of flow reduction for all cases above.
However, the highest reduction in critical flow coefficient could be achieved by attaching the rough surface to the shroud rather than the hub side (see Figures 4 and 5).This observation contradicts with the results reported by Ishida et al. [2] that showed the highest reduction in flow coefficient could be achieved by attaching the rough surface to the hub side.
Reduction in critical flow coefficient due to wall roughness for Do/Di = 2.0 and different sandpaper.
Hayder Salem and the undergraduate students at AUS who secured the experimental data.
Online since: July 2003
Authors: Irina Trendafilova
In practice the statistical characteristics of the attractor are much more easily assessed from data.
The statistical characteristics on the attractor are much easier to estimate from data.
The trouble with these characteristics is that they are very difficult to estimate from data.
The proposed method makes possible the straightforward and easy determination of these coefficients from data.
[8] Abarbanel H., Analysis of Observed Chaotic Data, (Springer Verl., 1996) [9] A.M.
Online since: June 2010
Authors: Fujio Abe, Ryuta Kasada, Akihiko Kimura, Shigeharu Ukai, Somei Ohnuki, Noriyuki Y. Iwata, Takanari Okuda, Masaki Inoue, Toshiharu Fujisawa
A drastic reduction in the oxygen and nitrogen contents after VHP was strongly affected by hydrogen gas used as the MA atmosphere.
After this, the compacts were sliced parallel to the uniaxial pressing direction, cold-rolled with a reduction of 40%, and annealed at 1300 °C for 90 min to prepare tensile test specimens.
It should be noted that oxygen, nitrogen, and carbon reductions were confirmed when the powder particles milled in hydrogen were used for the consolidation process.
Thermal analysis data of the MA/ODS-H powder showed a larger weight loss below the degassing temperature, especially in the temperature range from 160 °C to 380 °C, compared to that of the MA/ODS-Ar powder.
On the other hand, concerning the MA/ODS-H steel, impressive size reductions of the ZrO particles (can be seen only on the PPBs) and the oxide inclusions, as well as a highly homogeneous dispersion of the precipitates are more or less dominant compared to the MA/ODS-Al steel.
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