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Online since: March 2016
Authors: Ji Xiang Gao, Xue Wen Chen, Lie Jun Li, Jian Wei Niu, Hai Jun Liu
Under this situation, the effect of fragmentation on α-Al matrix reduced.
And the α-Al cells in part A are more coarser than that in part B.
Slip bands are formed in the Al dendrite at the crack tip and cracks propagate along with the eutectic phases in the α-Al matrix.
Abou El-khair, Microstructure characterization and tensile properties of squeeze-cast AlSiMg alloys, materials letters, 59(2005) 894-900
Abou El-khair, Microstructure characterization and tensile properties of squeeze-cast AlSiMg alloys, Materials Letters. 59(2005)894-900
Online since: December 2012
Authors: Ismail Hanafi, B.H. Abu Bakar, Mustafa Maher Al-Tayeb, Hazizan Md Akil
Effect of partial replacements of sand by waste rubber on the low impact resistance of concrete Mustafa Maher Al-Tayeb1, B.
Al-Tayeb et al. [3] investigated the effect of partial replacements of sand and cement by waste rubber on the fracture characteristics of concrete.
Al-Tayeb, B.
El-Dieb, M.A.
El-Wahab, M.E.
Online since: June 2007
Authors: Ho Kun Kim, Kyoung Jae Choi, Chang Hae Kim, Joung Kyu Park, Kyung Nam Kim
Next, a Ni/Au contact was evaporated onto the p-type GaN layer and a Ti/Al contact was evaporated onto the n-type GaN layer.
Sample (a) (b) (c) (d) (e) Peak Wavelength of LED Chip 405 nm 460 nm 405 nm 460 nm 405nm Precoated phosphors None None Blue Yellow Blue +Yellow Color of LED Lamp n-UV Blue Blue White White Results and Discussion Figure 1 shows the electroluminescence (EL) spectra of the samples : (a) an InGaN n-UV LED, (b) an InGaN blue LED and (c) a phosphor-conversion blue LED at RT under various forward-bias currents.
Figure 2 shows the EL spectra of sample: (d) a white LED in which a blue LED was combined with a yellow phosphor and (e) a white LED in which a n-UV LED was combined with blue and yellow phosphor at 20 mA.
EL spectra of (1) a white LED in which a blue LED was combined with a yellow phosphor [sample (d)] and (2) a white LED in which a n-UV LED was combined with blue and yellow phosphors [sample (e)] at 20 mA.
Wavelength(nm) 400 500 600 700 (1) Sample (d) (2) Sample (e) EL Intensity(a.u.)
Online since: November 2011
Authors: Mohan Kumar Pradhan, Chandan Kumar Biswas
Mamalis el al. [2] experimentally investigated on low-carbon steel St37, medium carbon steel C45 and alloyed steel 100Cr6 work piece and found that the peak stresses are almost independent of the discharge energy and approach the ultimate tensile strength of the material.
Rebelo el al. [3] in his investigation using XRD methodology found that the residual stress of steel work piece increases from the bulk material to a maximum and decreases again approaching the surface.
A qualitative relationship with the operating parameters was presented by Ekmekci el al. [4] using DIN 1.2738 (AISI P20) work piece material.
Yadav et al. [5] applied FEM to investigate the thermal stress generated by a single spark in EDM of Cr die steel.
Marafona et al. [6] developed a thermal-electrical model for sparks generated by electrical discharge in a liquid media.
Online since: March 2017
Authors: Lukáš Hlubocký, Zdeněk Prošek
The second possibility is substituting for cement, Aliabdo et al. found a positive effect on the mechanical properties of mortar and concrete when they substituting marble powder per the cement.
Ibrahim, et al., Health Risk Assessment of Marble Dust at Marble Workshops, Nature and Science, 9 (2011) 144-154
El-Hefnawi, Characterization of The Marble Sludge of The Shaq El Thoaban Industrial Zone, Egypt and Its Compatibility for Various Recycling Applications 6 (2012) 153-161
Prošek, et al., Influence of recycled concrete composition on its elastic stiffness, Key Engineering Materials 677 (2016) 288-291
Topič et al., Effect of PVA modification on the properties of cement composites, Acta Polytechnica 55 (2015) 64-75.
Online since: July 2017
Authors: Achanai Buasri, Vorrada Loryuenyong, Kanistha Pluemmalung, Pattarawadee Rattanapanya, Arayakamol Waeokhum
Le et al. [6] used 2-D graphene nanoplatelets (GNPs) in cement composites for structural health evaluation.
Zhou Fan et al. [7] investigated the properties of cementitious materials reinforced by graphene.
El-Gamal, S.
Abo-El-Enein, F.
El-Hosiny, M.
Online since: October 2010
Authors: Takuya Komoda, Toshihiro Iwakuma, Minoru Yamamoto, Nobuto Oka, Yuzo Shigesato
Alq3 or α-NPD films sandwiched between aluminum (Al) films [Al/(Alq3 or α-NPD)/Al] were deposited by vacuum evaporation, as commonly used materials in OLED devices.
Figure 6 shows the thermo-reflectance signals of Al/α-NPD/Al three-layered films.
Yokoi, “High Efficiency Organic EL Devices having Charge Generation Layers,” SID03 Digest, 964 (2003)
Kido, “Multiphoton Organic EL device having Charge Generation Layer,” SID03 Digest, 979 (2003)
Kido, “The High Growth Rates and High-Efficiency Materials Vapor Deposition for Organic EL Layers,” Ext.
Online since: August 2011
Authors: Nikolay V. Abrosimov, Erich Kasper, Michael Oehme, Martin Kittler, Tzanimir Arguirov, Jörg Schulze
Saraswat, et al., Opt.
El Kurdi, T.
Ngo et al., Appl.
El Kurdi, G.
Inset: Normalized EL spectra.
Online since: February 2013
Authors: Raymond Riise, Bjørn R Sørensen
Jensen and Sørensen [3] found an over capacity of 570% in installed power and a 420% over capacity in annual energy demand for four buildings in Narvik, Norway. [3,4,5]; Riise et al 2006; Riise et al. 2009, have also demonstrated that merging, co-ordinating and optimizing stand-alone systems into a local heating network can be an alternative to developing new district heating systems with only one mutual heating central.
Later, Riise et al [7] expanded the expression to also include the distribution heat loss.
Skartveit et al [12] claims that calculation of building’s energy performance should not be performed from long-term average of weather data, but rather by using generated collection of weather data representing the climate for the site in question.
Boiler dimensions data [kW]. 0% oversized 50% oversized 100% oversized 200% oversized El Oil El Oil El Oil El Oil Karasjok 520 580 780 870 1040 1160 1560 1740 Tromsø 290 320 435 480 580 640 870 960 Trondheim 340 370 510 555 850 925 1020 1110 Oslo 350 380 525 570 700 760 1050 1140 Boiler dimension for 0% oversized are calculated on basis of Eq. 9-12 by use of DOT for each location and data for Table 3.
Wigenstad et. al.: Energy certification of commercial buildings.
Online since: March 2017
Authors: Ahmed Omran Alhareb, Hazizan Md Akil, Zainal Arifin Ahmad
Yeh et al. [8] found that the thermal decomposition of these materials is high temperature range than PMMA matrix, which confirms the enhancement of thermal stability of reinforced PMMA.
These observations are in good agreement with Yeh et al. [8] whereby, the thermal decomposition of these materials are at higher temperature than PMMA matrix, which confirms the enhancement of thermal stability of reinforced PMMA.
This is in agreement with Rodney et al. [17] who reported that the DSC examination of PMMA denture base and appears two downward steps in the DSC curve that represent Tg and residual polymerization (unreacted monomer).
El-sheikh, Effect of aluminium oxide addition on the flexural strength and thermal diffusivity of heat-polymerized acrylic resin, J.
El-Aziz, Z.A.
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