Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: July 2011
Authors: Gaetano Manfredi, Antonio Bilotta, Emidio Nigro, Edoardo Cosenza, Giuseppe Cefarelli
To consider the effect of high temperature on the bond of FRP reinforcing bars to concrete, the results of the tests carried out by Katz and Berman [11] were essential: indeed, their results indicate a severe reduction in the bond strength as the temperature at the surface of the rods rises up and goes beyond the Tg value.
Young’s modulus dependence on temperature E(T) was also taken into account via the following reduction factor, calibrated by fitting the experimental data available in literature related to tensile tests performed on GFRP bars [9]: (5) where E is the Young’s modulus at ambient temperature.
Young’s modulus dependence on temperature E(T) was also taken into account via the following reduction factor, calibrated by fitting the experimental data available in literature related to tensile tests performed on GFRP bars [9]: (5) where E is the Young’s modulus at ambient temperature.
Online since: December 2024
Authors: Daniela Krisbéll Ortega Palmeira, Josy Anteveli Osajima, Ramón Raudel Peña Garcia, Fredy Alberto Huamán-Mamani, Alan Ícaro Sousa Morais
Data shows that Portland cement production is responsible for 8% of total CO2 emissions [5].
For materials MK650 and MK750, shown in Fig. 1d1 and Fig. 1e1, respectively, metakaolin produced from kaolin through heat treatment exhibited the disappearance of some peaks, such as at 2θ = 12.39° and 24.9°, and a reduction in other peaks [10,13].
For the materials MK650 and MK750, shown in Fig. 3d and Fig. 3e, respectively, the metakaolin produced from kaolin through heat treatment exhibited the disappearance of some peaks, such as at 2θ = 12.39° and 24.9°, a reduction in other peaks, and the appearance of a new peak at 25.31°, highlighting the transformation of kaolin into metakaolin [10,13].
For materials MK650 and MK750, shown in Fig. 1d1 and Fig. 1e1, respectively, metakaolin produced from kaolin through heat treatment exhibited the disappearance of some peaks, such as at 2θ = 12.39° and 24.9°, and a reduction in other peaks [10,13].
For the materials MK650 and MK750, shown in Fig. 3d and Fig. 3e, respectively, the metakaolin produced from kaolin through heat treatment exhibited the disappearance of some peaks, such as at 2θ = 12.39° and 24.9°, a reduction in other peaks, and the appearance of a new peak at 25.31°, highlighting the transformation of kaolin into metakaolin [10,13].
Study of Effects of Different Fertigation Modes on Soil Profile Nitrogen Distribution and Rice Yield
Online since: June 2014
Authors: Xiao Hou Shao, Guan Xi Zhu, Yuan Yuan Li, Jie Liu, Qi Jin Wu
Data collection and analysis procedure.
With the same fertilization mode, yield of S2 was lower than that of C2, whereas yields of S1 and S3 were significantly increased compared to those of C1 and C3 respectively, suggesting that controlled and mid-gathering irrigation could ensure rice yield with advantages of water saving and pollution reduction.
(2) Under the same fertilization mode, controlled and mid-gathering irrigation would promote the rice growth and accumulation of dry matter, favor uptake of nitrogen and ensure rice yield with the advantages of water saving and pollution reduction compared with conventional irrigation.
With the same fertilization mode, yield of S2 was lower than that of C2, whereas yields of S1 and S3 were significantly increased compared to those of C1 and C3 respectively, suggesting that controlled and mid-gathering irrigation could ensure rice yield with advantages of water saving and pollution reduction.
(2) Under the same fertilization mode, controlled and mid-gathering irrigation would promote the rice growth and accumulation of dry matter, favor uptake of nitrogen and ensure rice yield with the advantages of water saving and pollution reduction compared with conventional irrigation.
Online since: December 2013
Authors: Shamsul Baharin Jamaludin, Alida Abdullah, Baba Gowon, Kahtan S. Mohammed
They stressed that enough documented evidences show that a reduction in the use of lead for hunting also benefits wildlife and humans who consume wild game.
In the U.S, a total of 40 states submitted data in 2008 and 2009.
Toxic Use Reduction Institute.
In the U.S, a total of 40 states submitted data in 2008 and 2009.
Toxic Use Reduction Institute.
Online since: November 2017
Authors: Vitaliy S. Borovik, Vitaliy V. Borovik, Dmitry A. Skorobogatchenko
Fig. 1 that 0Bx1˂0Ax1 therefore, in the transition from 1Y to 2Y level comes free energy reduction substances than create the preconditions for the development of the crystallization process.
Given that 0Bx2˂0Ax2 i.e. drop in temperature is accompanied by a reduction in the particle velocity relative to its middle position, therefore, the crystallization process is developed.
Hashimoto, Four-dimensional Mathematical Data Visualization via Embodied Four-dimensional Space Display System, Forma. 26 (2011) 11-18
Given that 0Bx2˂0Ax2 i.e. drop in temperature is accompanied by a reduction in the particle velocity relative to its middle position, therefore, the crystallization process is developed.
Hashimoto, Four-dimensional Mathematical Data Visualization via Embodied Four-dimensional Space Display System, Forma. 26 (2011) 11-18
Online since: October 2011
Authors: Judit Sandquist, Wilson Babu Musinguzi, Roger A. Khalil, Michaël Becidan, Øyvind Skreiberg, Franziska Goile, Terese Løvås, Lars Sørum, Ehsan Houshfar
Certain elements (Ca, Si) can reduce such problems by influencing the ash chemistry resulting in an increase of the ash melting temperature and a reduction of corrosion an fouling through the capture of alkalis in the bottom ash [7,10-12].
Element data concentrations below 0.01 wt% in ash are not presented.
However at the optimum primary excess air ratio, the NOx reduction is 60-70%.
Element data concentrations below 0.01 wt% in ash are not presented.
However at the optimum primary excess air ratio, the NOx reduction is 60-70%.
Online since: October 2007
Authors: Matthias Militzer, Chad W. Sinclair, J.D. Mithieux, H. Azizi-Alizamini
After quenching, the
materials were cold-rolled on a laboratory rolling mill (roll diameter: 130mm) to a thickness
reduction of 70%.
Upon rolling to 70% reduction, the hardness of the low carbon steel increases substantially, rising from HV = 460±5 to HV = 600±5.
Ferrite Rolled As Rolled 550 o C, 60min 650 o C, 15min True Stress (MPa) True Strain 0.00 0.05 0.10 0.15 0.20 0.25 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 Stainless Steel As rolled 550 o C, 60min 650 o C, 15min 750 o C, 15min Carbon Steel As Rolled 550 o C, 30min 650 o C, 30min True Stress (MPa) True Strain 0 4 8 12 16 20 500 1000 1500 2000 2500 Stainless Steel Low Carbon Steel Ueji et al. [14] Tensile Strength (MPa) Uniform Elongation (%) (a) (b) (c) Fig. 3: (a) Tensile behaviour for stainless steel cold rolled and annealed starting from both a recrystallized ferritic microstructure (black symbols) and a martensitic structure (white symbols) (b) comparison between the tensile response for martensite rolled stainless and low carbon steels and (c) relationship between tensile strength and uniform elongation for the stainless and carbon steels considered here as well as for data
Upon rolling to 70% reduction, the hardness of the low carbon steel increases substantially, rising from HV = 460±5 to HV = 600±5.
Ferrite Rolled As Rolled 550 o C, 60min 650 o C, 15min True Stress (MPa) True Strain 0.00 0.05 0.10 0.15 0.20 0.25 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 Stainless Steel As rolled 550 o C, 60min 650 o C, 15min 750 o C, 15min Carbon Steel As Rolled 550 o C, 30min 650 o C, 30min True Stress (MPa) True Strain 0 4 8 12 16 20 500 1000 1500 2000 2500 Stainless Steel Low Carbon Steel Ueji et al. [14] Tensile Strength (MPa) Uniform Elongation (%) (a) (b) (c) Fig. 3: (a) Tensile behaviour for stainless steel cold rolled and annealed starting from both a recrystallized ferritic microstructure (black symbols) and a martensitic structure (white symbols) (b) comparison between the tensile response for martensite rolled stainless and low carbon steels and (c) relationship between tensile strength and uniform elongation for the stainless and carbon steels considered here as well as for data
Online since: August 2004
Authors: Sang H. Lee, Seung Seok Lee, J.J. Choi, Jong U. Jeon, K. Ro
For the size reduction and the high resonance
frequency, the rf-magnetron sputtered ZnO layer is also integrated on the cantilever.
The ZnO layer is integrated as the actuation layer for the size reduction and for the high resonance frequency.
The sharp (002) peak appears around 34.4 o , which is confirmed from JCP-data.
The ZnO layer is integrated as the actuation layer for the size reduction and for the high resonance frequency.
The sharp (002) peak appears around 34.4 o , which is confirmed from JCP-data.
Online since: September 2007
Authors: Gabriel Ferro, Yves Monteil, Maher Soueidan, François Cauwet, Olivier Kim-Hak
Notice
that the carbon solubility are given for the pure metallic elements only because of the lack of
experimental data for metal-Si alloys.
For homoepitaxial layers, Al-based melts allow the higher temperature reduction, down to 1100°C.
The resulting highly p-type doped layers have already shown interesting electrical Fig. 5 : Surface morphology of single-domain 3C-SiC layers grown by VLS in a) Si50Ge50 melt at 1250°C, b) Si25Sn75 at 1300°C, b)Si25Ga75 at 1200°C. 50 µm a c 100 µm b characteristics and could be used for reduction of metal contact resistance in bipolar devices.
For homoepitaxial layers, Al-based melts allow the higher temperature reduction, down to 1100°C.
The resulting highly p-type doped layers have already shown interesting electrical Fig. 5 : Surface morphology of single-domain 3C-SiC layers grown by VLS in a) Si50Ge50 melt at 1250°C, b) Si25Sn75 at 1300°C, b)Si25Ga75 at 1200°C. 50 µm a c 100 µm b characteristics and could be used for reduction of metal contact resistance in bipolar devices.
Online since: October 2011
Authors: Emad A. Badawi, M.A. Abdel-Rahman, N.A. Kamel, Yahia A. Lotfy, Abdullah A. Refeay
Lifetime spectra and hardness data were always taken at RT.
(iii) Weak reduction in correspondence with over-ageing (stage of decreasing hardness).
Furthermore, the small reduction in hardness after solution heat treatment at 480 °C and partial melting observed of 500 to 530 °C evidences that a satisfactory thermal processing was not attained on these alloys.
(iii) Weak reduction in correspondence with over-ageing (stage of decreasing hardness).
Furthermore, the small reduction in hardness after solution heat treatment at 480 °C and partial melting observed of 500 to 530 °C evidences that a satisfactory thermal processing was not attained on these alloys.