Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: January 2013
Authors: Sashi K. Kunnath, Amin Ahmadi
This program, which was developed by Abrahamson and Al-Atik [4], adds finite-length wavelets to the initial time series to modify its frequency content.
In this study RSPMATCH (developed by Abrahamson and Al-Atik [4]) is used to change the frequency content of the time series in time domain.
Details of the building can be found in Kunnath et al. [5].
Al-Atik, An Improved Method for Nonstationary Spectral Matching, Earthquake Spectra (2010), 26 (3), 601-617
El-Tawil, Modeling and Response Prediction in Performance-based Seismic Evaluation: Case Studies of Instrumented Steel Moment-frame Buildings, Earthquake Spectra (2004), 20 (3), 883-915 [6] J.W.
In this study RSPMATCH (developed by Abrahamson and Al-Atik [4]) is used to change the frequency content of the time series in time domain.
Details of the building can be found in Kunnath et al. [5].
Al-Atik, An Improved Method for Nonstationary Spectral Matching, Earthquake Spectra (2010), 26 (3), 601-617
El-Tawil, Modeling and Response Prediction in Performance-based Seismic Evaluation: Case Studies of Instrumented Steel Moment-frame Buildings, Earthquake Spectra (2004), 20 (3), 883-915 [6] J.W.
Online since: November 2016
Authors: Regi P. Mohan, Jefeena Sali
W.Y.Li et al.[1]Employed three examples of box-girder bridges of different geometrical shapes to demonstrate the accuracy and versatility of the finite strip method.
Kaoru et al.[2]Provided the information required to formulate an effective width rule for design of curved girder bridges and the theory used in this analysis is the refined beam theory.
Yasunori et al.[3]Investigated on response and slip behaviour of curved composite box girders with end diaphragms and also conducted a parametric study to evaluate the effect of cross sectional deformation on the stresses of the girders.
Ayman et al. [7] Conducted a detailed investigation of warping related stress of composite steel concrete box girder bridges of different radius of curvature and span length Methodology · A flyover in Kerala which is a prestressed trapezoidal box girder bridge is chosen for the study.
Okeil,and Sherif El-Tawil, “Warping Stresses in Curved Box Girder Bridges: Case Study” Journal of Bridge Engineering, Vol. 9,pp.487-496, September1,2004 [8] Byung H.
Kaoru et al.[2]Provided the information required to formulate an effective width rule for design of curved girder bridges and the theory used in this analysis is the refined beam theory.
Yasunori et al.[3]Investigated on response and slip behaviour of curved composite box girders with end diaphragms and also conducted a parametric study to evaluate the effect of cross sectional deformation on the stresses of the girders.
Ayman et al. [7] Conducted a detailed investigation of warping related stress of composite steel concrete box girder bridges of different radius of curvature and span length Methodology · A flyover in Kerala which is a prestressed trapezoidal box girder bridge is chosen for the study.
Okeil,and Sherif El-Tawil, “Warping Stresses in Curved Box Girder Bridges: Case Study” Journal of Bridge Engineering, Vol. 9,pp.487-496, September1,2004 [8] Byung H.
Online since: October 2010
Authors: Wen Hui Xue, Xing Guo Geng, Feng Li, Jie Li, Yao Zhang, Jun Wu
Introduction
Alekseev et al. [1] discovered that dimples might be useful for drag reduction in 1998.
Xu Zhong et al. [4] have studied the dimpled surface utilizing the direct numerical simulation (DNS) and otained a drag reduction efficiency of 15.1%.
Zhang C C et al. [5] have performed experiments using dimpled surfaces for bodies of revolution, and got a total drag reduction efficiency 2.98 % with the Reynolds number.
The variation of drag reduction with development of dimple depth For the periodic dimpled surface, Xu Zhong et al. have reported that there is reverse flow at the bottom of the dimples performing as micro-rolling bearing, which can fix the flowing vortex.
Vasconcelos and E.L.
Xu Zhong et al. [4] have studied the dimpled surface utilizing the direct numerical simulation (DNS) and otained a drag reduction efficiency of 15.1%.
Zhang C C et al. [5] have performed experiments using dimpled surfaces for bodies of revolution, and got a total drag reduction efficiency 2.98 % with the Reynolds number.
The variation of drag reduction with development of dimple depth For the periodic dimpled surface, Xu Zhong et al. have reported that there is reverse flow at the bottom of the dimples performing as micro-rolling bearing, which can fix the flowing vortex.
Vasconcelos and E.L.
Online since: November 2022
Authors: Djoko Hadi Prajitno, Herry Oktadinata, M. Sa'ban Dafi
For nodularizing treatment, magnesium alloy FeSiMg (45.68wt% Si and 5.31wt% Mg) as nodulizer and inoculant (67wt% Si, 0.8wt% Al, and 1.7wt% Ba) as a nucleation agent were placed at the bottom of the ladle.
Bai et al., “Effect of cyclic quenching treatment on microstructural evolution and properties of ductile cast iron,” J.
Soon et al., “Investigation of Processing Parameter for ‘In ladle Treatment’of Ductile Iron Using High Sulphuric Pig Iron,” in National Conference in Mechanical Engineering Research, FKM Conference Hall, UMP, Kuantan, Pahang, Malaysia, 2010, pp. 363–374
El-Kashif, A.
Tewary et al., “The origin of graphite morphology in cast iron,” Acta Mater., vol. 226, p. 117660, 2022
Bai et al., “Effect of cyclic quenching treatment on microstructural evolution and properties of ductile cast iron,” J.
Soon et al., “Investigation of Processing Parameter for ‘In ladle Treatment’of Ductile Iron Using High Sulphuric Pig Iron,” in National Conference in Mechanical Engineering Research, FKM Conference Hall, UMP, Kuantan, Pahang, Malaysia, 2010, pp. 363–374
El-Kashif, A.
Tewary et al., “The origin of graphite morphology in cast iron,” Acta Mater., vol. 226, p. 117660, 2022
Online since: July 2007
Authors: Kai Feng Zhang, Guo Feng Wang, K.C. Chan, C.L. Wang
For example, as compared to their
microcrystalline counterparts, the superplastic temperatures of nanocrystalline materials have been
reported by Mcfadden et al. to decrease by ~400
o
C for nickel, ~200
o
C for Al1420, and ~325
o
C for
Ni3Al [1,2].
As suggested by Mcfadden et al although dislocation slip plasticity can account for low temperature superplasticity, the measured aspect ratio of 2 is not sufficient to account for the measured elongation, indicating that the large elongation obtained cannot be attributed to dislocation slip plasticity alone because the grains did not elongate in the same proportion to the elongation.
This twinning structure was not observed by McFadden et al. in Ref. [4,16].
It is important mentioning that significant sulfur segregation is not observed in Fig. 4 as compared to the findings of Torre et al [22].
El-sherik and U.
As suggested by Mcfadden et al although dislocation slip plasticity can account for low temperature superplasticity, the measured aspect ratio of 2 is not sufficient to account for the measured elongation, indicating that the large elongation obtained cannot be attributed to dislocation slip plasticity alone because the grains did not elongate in the same proportion to the elongation.
This twinning structure was not observed by McFadden et al. in Ref. [4,16].
It is important mentioning that significant sulfur segregation is not observed in Fig. 4 as compared to the findings of Torre et al [22].
El-sherik and U.
Online since: March 2011
Authors: Paul Andrews, Philip J. Withers, Wei Li, Judith Shackleton, Michael Preuss
Arunachalam et al (2004) observed that the residual stress at the turned surface of Inconel 718 superalloy was compressive at the outer diameter, gradually increasing to tensile at the inner diameter [3].
RR1000 is manufactured via powder metallurgy route with a chemical composition of 15% Cr, 18.5% Co, 5% Mo, 3% Al, 4% Ti, 2% Ta, 0.06% Zr, 0.027% C, 0.015% B, 0.5% Hf and Ni balance.
Li et al. (2006) correlated the measured plastic work with FWHM and thus obtained a calibration curve [1].
This is consistent with the observations of Preuss et al. [11] and relates to changing solute concentrations due to changes in g’ precipitation. d0 falls to the level of the parent material at ~90μm suggesting that the heat affected zone (HAZ) extends to this depth; d0 drops sharply over the first 10mm being slightly sharper for the outer radius (.
El-Wardany, H.
RR1000 is manufactured via powder metallurgy route with a chemical composition of 15% Cr, 18.5% Co, 5% Mo, 3% Al, 4% Ti, 2% Ta, 0.06% Zr, 0.027% C, 0.015% B, 0.5% Hf and Ni balance.
Li et al. (2006) correlated the measured plastic work with FWHM and thus obtained a calibration curve [1].
This is consistent with the observations of Preuss et al. [11] and relates to changing solute concentrations due to changes in g’ precipitation. d0 falls to the level of the parent material at ~90μm suggesting that the heat affected zone (HAZ) extends to this depth; d0 drops sharply over the first 10mm being slightly sharper for the outer radius (.
El-Wardany, H.
Online since: November 2012
Authors: Shu Xia Lin, Jun Gao, Wen Ke Bao, Jia Bin Wang
Adding the ferrite forming elements such as Cr, Si, Al, Mo, which can change the phase in stainless steel from single austenite structure to a duplex structure of austenite and ferrite, is a valid method to avoid intergranular corrosion.
Yu Jiakang, Cao Chunan et al [15] used the photochemical laser imaging technology and resonance Raman spectrum method, to assess the intergranular corrosion sensitivity of sensitized stainless steel, and point out that the 1Cr18Ni9Ti will have a serious intergranular corrosion sensitivity when the sensitization time is long.
Zhao Changjiu et al [16] researched on the sensitivity to intergranular corrosion of 1Cr18N i9Ti by EPR method and oxalic acid etching method.
Besides, Yu Xiaofei et al made a comprehensive analysis on the various criterions of EPR method evaluating the sensitivity to intergranular corrosion of stainless steel [17].
[3] R Abdel-Karim , I Elmahallawi and K El-Menshawy: Microstructure and corrosion properties of nitrogen stainless steel 316L produced by hipping [J].
Yu Jiakang, Cao Chunan et al [15] used the photochemical laser imaging technology and resonance Raman spectrum method, to assess the intergranular corrosion sensitivity of sensitized stainless steel, and point out that the 1Cr18Ni9Ti will have a serious intergranular corrosion sensitivity when the sensitization time is long.
Zhao Changjiu et al [16] researched on the sensitivity to intergranular corrosion of 1Cr18N i9Ti by EPR method and oxalic acid etching method.
Besides, Yu Xiaofei et al made a comprehensive analysis on the various criterions of EPR method evaluating the sensitivity to intergranular corrosion of stainless steel [17].
[3] R Abdel-Karim , I Elmahallawi and K El-Menshawy: Microstructure and corrosion properties of nitrogen stainless steel 316L produced by hipping [J].
Online since: January 2013
Authors: Feng Gao, Gang Li, Hiroshi Okada
Embeded cholesterol in artery wall can also attract cellular waste products, alcium and fibrin, et al.
Greenlund, et al. 2009.
Kiemeneij, et al.: A comparison of balloon-expandable-stent implantation with balloon angioplasty in patients with coronary artery disease.
Schievano, el. al.
Greenlund, et al. 2009.
Kiemeneij, et al.: A comparison of balloon-expandable-stent implantation with balloon angioplasty in patients with coronary artery disease.
Schievano, el. al.
Online since: September 2017
Authors: Sutham Srilomsak, Lada Punsukumtana, Sukasem Watcharamaisakul, Wimonlak Sutapun, Prapatsorn Prathungthai
For instance, Liu et al. [8] created a robust surface roughness from SiO2 nanoparticles with a surface modification of polydimethylsiloxane (PDMS).
Hwang et al. [12] synthesized transparent hydrophobic SiO2 nanoparticles with a matrix of 3glycidoxypropyltrimethoxy-silane (GPTS) and tetramethylorthosilicate (TMOS).
Gurav et al. [13] prepared self-cleaning superhydrophobic silica coatings that were modified from SiO2 microparticles with methyltrichlorosilane (MTCS).
Hsu et al. [14] fabricated a hydrophobic and omnidirectional antireflective coating, that employed SiO2 nanospheres using an n-octadecyl-triethoxysilane solution (C18-TEOS).
El Hawi, A.
Hwang et al. [12] synthesized transparent hydrophobic SiO2 nanoparticles with a matrix of 3glycidoxypropyltrimethoxy-silane (GPTS) and tetramethylorthosilicate (TMOS).
Gurav et al. [13] prepared self-cleaning superhydrophobic silica coatings that were modified from SiO2 microparticles with methyltrichlorosilane (MTCS).
Hsu et al. [14] fabricated a hydrophobic and omnidirectional antireflective coating, that employed SiO2 nanospheres using an n-octadecyl-triethoxysilane solution (C18-TEOS).
El Hawi, A.
Online since: August 2019
Authors: P.N. Mary Lissy, G. Madhu, Roy M. Thomas
Fig.4 is the EDX analysis which reveals the presence of elements Al, Fe, C, and O in the prepared nanocomposite.
References [1] Hamidreza Sadegh et.al.
[4] Chahrazed Boukhalfa et.al,“Removal of Copper from Aqueous Solutions by Coprecipitation with Hydrated Iron Oxide”, Asian Journal of Chemistry Vol. 19, No. 6 (2007), 4267-4276
[6] Mona Mahmoud Abd El-Latif et.al, “Alumina/Iron Oxide Nano Composite for Cadmium Ions Removal from Aqueous Solutions”, International Journal of Nonferrous Metallurgy, 2013, Vol 2, Pp 47-62.
References [1] Hamidreza Sadegh et.al.
[4] Chahrazed Boukhalfa et.al,“Removal of Copper from Aqueous Solutions by Coprecipitation with Hydrated Iron Oxide”, Asian Journal of Chemistry Vol. 19, No. 6 (2007), 4267-4276
[6] Mona Mahmoud Abd El-Latif et.al, “Alumina/Iron Oxide Nano Composite for Cadmium Ions Removal from Aqueous Solutions”, International Journal of Nonferrous Metallurgy, 2013, Vol 2, Pp 47-62.