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Online since: June 2022
Authors: Radu Cojocaru, Lia-Nicoleta Botila
Results obtained by ISIM in the field of FSW-IG welding are presented: data / information on solutions for applying inert gas in the welding area, as well as experimental results obtained for FSW-IG welding of DD13 steel, Cu99 copper and AZ31B magnesium alloy respectively.
The experimental welding programs generated the necessary data for the development of the FSW-IG welding technologies for the approached materials.
Regarding the evaluation of the residual stresses for the new FSW and FSW-IG welded joints made for this purpose, it can be concluded that: - when increasing the welding speed in the case of using classic FSW welding process, there was a significant decrease in the values of residual compression stresses, the phenomenon of smaller magnitude manifesting in the case of FSW-IG as well; - the use of the FSW–IG welding method has determined a reduction of the residual compression stresses values compared to those registered in the case of using the classic FSW method.
When using optimized technological parameters, very good results were obtained; - Compared to the application of the classic FSW process using the same experimental conditions, the following results were obtained: o increasing the tensile strength of the welded joint (for DD13 steel, Cu99 copper and AZ31B magnesium alloy), which is one of the important objectives to be achieved by applying FSW– IG welding; o improving / increasing the degree of deformability (magnesium alloy AZ31B); o improving the aspect of the welding surface (DD13 steel, Cu99 copper, AZ31B magnesium alloy); o reduction of defects and imperfections in the FSW-IG welded joint, including the use of severe working regimes - high welding speeds (AZ31B, Cu99)
The experimental welding programs generated the necessary data for the development of the FSW-IG welding technologies for the approached materials.
Regarding the evaluation of the residual stresses for the new FSW and FSW-IG welded joints made for this purpose, it can be concluded that: - when increasing the welding speed in the case of using classic FSW welding process, there was a significant decrease in the values of residual compression stresses, the phenomenon of smaller magnitude manifesting in the case of FSW-IG as well; - the use of the FSW–IG welding method has determined a reduction of the residual compression stresses values compared to those registered in the case of using the classic FSW method.
When using optimized technological parameters, very good results were obtained; - Compared to the application of the classic FSW process using the same experimental conditions, the following results were obtained: o increasing the tensile strength of the welded joint (for DD13 steel, Cu99 copper and AZ31B magnesium alloy), which is one of the important objectives to be achieved by applying FSW– IG welding; o improving / increasing the degree of deformability (magnesium alloy AZ31B); o improving the aspect of the welding surface (DD13 steel, Cu99 copper, AZ31B magnesium alloy); o reduction of defects and imperfections in the FSW-IG welded joint, including the use of severe working regimes - high welding speeds (AZ31B, Cu99)
Online since: May 2024
Authors: Philippe Bernard Himbane, Lat Grand Ndiaye, Omar Kata Faye
In addition, rice is traditionally grown in Casamance and in some Diola circles, it had become one of the criteria of wealth, which explains why it occupied most of the cultivated areas and each year thousands of tons of rice husk are burned for elimination/reduction without any recovery.
Several major benefits derived from performing the anaerobic digestion process for farming as well as grazing animals include waste stabilization, pathogen reduction, odor control, energy production, nutrient recovery and mineralization, reduction of potential for groundwater and surface water contamination, high-quality stable and solid-liquid fertilizers for soil conditioner [11].
Table 2 Physic-chemical characterization of the inoculum Settings Inoculum pH 7.4 % TS 7,506 %H 92,494 % OM 48,299 %MM 51,710 % C 27,758 % N 1,457 C/N 19.051 In the literature, experimental data have demonstrated that ultimate methane yield and methane production rates are dependent on specific substrates and inoculum [26].
Several major benefits derived from performing the anaerobic digestion process for farming as well as grazing animals include waste stabilization, pathogen reduction, odor control, energy production, nutrient recovery and mineralization, reduction of potential for groundwater and surface water contamination, high-quality stable and solid-liquid fertilizers for soil conditioner [11].
Table 2 Physic-chemical characterization of the inoculum Settings Inoculum pH 7.4 % TS 7,506 %H 92,494 % OM 48,299 %MM 51,710 % C 27,758 % N 1,457 C/N 19.051 In the literature, experimental data have demonstrated that ultimate methane yield and methane production rates are dependent on specific substrates and inoculum [26].
Online since: May 2009
Authors: Helen R. Watling, Denis W. Shiers, Alexander D. Elliot, Felicity A. Perrot
Some examples are
discussed and illustrated with data for a copper-nickel sulfide ore.
A consequence of precipitation is the reduction in ferric ion concentrations available to react with sulfide minerals to form the ferrous ions required for continued bacterial growth.
A consequence of precipitation is the reduction in ferric ion concentrations available to react with sulfide minerals to form the ferrous ions required for continued bacterial growth.
Life Cycle Analysis on Atmospheric and Vacuum Distillation Process: Energy Consumption and Emissions
Online since: February 2014
Authors: Hui Li, Ren Jin Sun, Ning Ma, Keng Chung
Subsequent articles discuss the two models of the life cycle costs in delayed coking process which using the actual refinery instance data.
Therefore, it has practical significance to link the ecological problems with the main product of refinery system so as to seek solutions and take corresponding measures to realize energy saving and emission reduction.
Therefore, it has practical significance to link the ecological problems with the main product of refinery system so as to seek solutions and take corresponding measures to realize energy saving and emission reduction.
Online since: July 2011
Authors: Guang Yu She, Ling Zhao
The influences of factors such as particle filling ratio, particle filling scheme and vibration direction of the frame on the damping effect are discussed by means of test data.
On account of the prominent advantages of the NOPD technique in the structural vibration reduction, the suitable application of NOPD to the frame structure would be able to improve the structural damping and lower the vibration amplitude so as to avoid destroying or reduce the damage of the structure if the structure vibrates due to the earthquake or other actions.
Therefore, the five groups of data for the same particle filling arrangement but different initial displacements are drawn in the same chart and analyzed as one group of data to acquire the corresponding polynomial fitting curve.
For the purpose of comparing the distinctions among the three schemes of particle arrangement in the damping effect, the relation curves between the damping change and the particle filling ratio are drawn for the three schemes and the two vibration directions in Fig.6, according to the average value of each group of test data.
On account of the prominent advantages of the NOPD technique in the structural vibration reduction, the suitable application of NOPD to the frame structure would be able to improve the structural damping and lower the vibration amplitude so as to avoid destroying or reduce the damage of the structure if the structure vibrates due to the earthquake or other actions.
Therefore, the five groups of data for the same particle filling arrangement but different initial displacements are drawn in the same chart and analyzed as one group of data to acquire the corresponding polynomial fitting curve.
For the purpose of comparing the distinctions among the three schemes of particle arrangement in the damping effect, the relation curves between the damping change and the particle filling ratio are drawn for the three schemes and the two vibration directions in Fig.6, according to the average value of each group of test data.
Online since: June 2012
Authors: Hui Bin Wu, Di Tang, Liu Yang, Hong Wei Zheng
Based on the experiment data, the parameters in the mathematical model were regressed by using SPSS (Statistic Package for Social Science), and the mathematical model of the deformation resistance of X120 pipeline steel was established finally.
The reduction rate was 60% and the deformation rates were 1/s, 5/s, 10/s respectively.
Based on experiment data, the parameters in Eq. (1) were regressed by using SPSS (Statistic Package for Social Science).
Tab.2 The coefficient table of the mathematical model σ0/MPa a1 a2 a3 a4 a5 a6 208 -2.1443 1.6638 0.3764 -0.3793 0.2537 3.1355 From this, the mathematical model of deformation resistance for X120 pipeline steel is established as shown in Eq. (2): (2) In order to verify the accuracy of the model, corresponding deformation resistance was calculated using the mathematical model regressed from experiment data, and then they were compared with the experiment values.
Therefore, the model can provide useful data for the calculation of rolling force of X120 pipeline steel.
The reduction rate was 60% and the deformation rates were 1/s, 5/s, 10/s respectively.
Based on experiment data, the parameters in Eq. (1) were regressed by using SPSS (Statistic Package for Social Science).
Tab.2 The coefficient table of the mathematical model σ0/MPa a1 a2 a3 a4 a5 a6 208 -2.1443 1.6638 0.3764 -0.3793 0.2537 3.1355 From this, the mathematical model of deformation resistance for X120 pipeline steel is established as shown in Eq. (2): (2) In order to verify the accuracy of the model, corresponding deformation resistance was calculated using the mathematical model regressed from experiment data, and then they were compared with the experiment values.
Therefore, the model can provide useful data for the calculation of rolling force of X120 pipeline steel.
Online since: April 2022
Authors: Richard J. Ball, Rajnish Kurchania, Saket S. Phadkule, Kumar Navin, Archana Nigrawal
The addition of both types of nanoparticles in the PVA matrix led to a reduction in water absorption in addition to the water solubility capability of the material when compared to the pure PVA film.
Fig.3(a). shows the XRD data of the (101) plane of the PVA, which appears in the pure PVA and PVA based nanocomposite films.
Water Absorption and Water Solubility data of the Polyvinyl alcohol (PVA) and PVA-based composite films containing SiO2, ZnO and SiO2 - ZnO nanoparticles. 3.3 Tensile strength measurement The tensile test was carried out to measure the maximum load that each type of prepared nanocomposite film can withstand.
The maximum reduction was observed for PVA-ZnO-SiO2 nanocomposite films.
Fig.3(a). shows the XRD data of the (101) plane of the PVA, which appears in the pure PVA and PVA based nanocomposite films.
Water Absorption and Water Solubility data of the Polyvinyl alcohol (PVA) and PVA-based composite films containing SiO2, ZnO and SiO2 - ZnO nanoparticles. 3.3 Tensile strength measurement The tensile test was carried out to measure the maximum load that each type of prepared nanocomposite film can withstand.
The maximum reduction was observed for PVA-ZnO-SiO2 nanocomposite films.
Online since: June 2010
Authors: Muhammad Khalid, M. Shuaib, A.A. Khan
It is evident in Fig.5 and data given
in table 1 that all the properties are being stabilized when the sample was heated at 100°C (28 days
after poling) which is in accordance with the reported fact [15].
Doping of PZT with Sr also reduces the curie point, therefore, there is upper limit for Sr doping to avoid excessive reduction in curie point.
Data given in table 1 is useful in evaluation of overall change in dielectric and piezoelectric properties in 9% Sr doped PZT with ageing time and the effect of heating at 100°C to stabilize the properties.
However, no such ageing data is available in literature for 9% Sr doped PZT.
Property Change in Properties for first 28 days Change in properties after heating at 100°C for 03 days (Data for last 56 Days) Total Change in Property (Data for 84 days) Coupling Coefficient (k) 9.5 % decrease 1.5 % decrease 11% decrease Charge Coefficient (d33) 13.5% decrease 3.5 % decrease 17 % decrease Dielectric Constant (K) 4.5% decrease 1% decrease 5.5 % decrease Dielectric Loss 12% increase 2.5 % increase 14.5% increase Heating at 100°C for 3days Heating at 50°C for 5days Fig. 5 Ageing behavior of dielectric and piezoelectric properties up to 84 days after poling.
Doping of PZT with Sr also reduces the curie point, therefore, there is upper limit for Sr doping to avoid excessive reduction in curie point.
Data given in table 1 is useful in evaluation of overall change in dielectric and piezoelectric properties in 9% Sr doped PZT with ageing time and the effect of heating at 100°C to stabilize the properties.
However, no such ageing data is available in literature for 9% Sr doped PZT.
Property Change in Properties for first 28 days Change in properties after heating at 100°C for 03 days (Data for last 56 Days) Total Change in Property (Data for 84 days) Coupling Coefficient (k) 9.5 % decrease 1.5 % decrease 11% decrease Charge Coefficient (d33) 13.5% decrease 3.5 % decrease 17 % decrease Dielectric Constant (K) 4.5% decrease 1% decrease 5.5 % decrease Dielectric Loss 12% increase 2.5 % increase 14.5% increase Heating at 100°C for 3days Heating at 50°C for 5days Fig. 5 Ageing behavior of dielectric and piezoelectric properties up to 84 days after poling.
Online since: October 2014
Authors: Yi Feng, Fei Li, Xiao Lin, Zhi Yong Liu, Gen Hua Zhu, Zhi Hong Yan, Yao Kun Xiong
Data analyses
Post-acquisition analyses were undertaken using MassLynx® v4.1 (Waters).
Data are representative of three independent experiments.
The 1H-NMR data of SEI and Compound 5 are shown in Table 2.
The spectral lines observed for hydrogen at positions 4 and 10 showed considerable displacement but, apart from these features, other data were very similar to those seen previously [20,23].
The data elicited by this study will provide useful information for further pharmacological and dose-based research on SEI.
Data are representative of three independent experiments.
The 1H-NMR data of SEI and Compound 5 are shown in Table 2.
The spectral lines observed for hydrogen at positions 4 and 10 showed considerable displacement but, apart from these features, other data were very similar to those seen previously [20,23].
The data elicited by this study will provide useful information for further pharmacological and dose-based research on SEI.
Online since: February 2025
Authors: Agustinus Andri Tobi, Simon Patabang, Jeremias Leda
The design analysis results include data on the capacity of each PLTS component, which will be used to build the PLTS system according to the power requirements of the water pump.
pout= Pin×efficiency % (14) Where: Pout : Inverter output (W) Pin : Inverter input (W) Effisiensi : Inverter efficiency (%) Data Analysis 1.
Load The load specification data used in the design of the photovoltaic water pump system at Stella Maris Hospital Makassar is shown in Table 1.
Solar Radiation Irradiance data collection at Stella Maris Hospital Makassar with Latitude -5.147 / Longitude 119.403, with irradiance data obtained from NASA POWER for the year of 2022.
[8] POWER | Data Access Viewer (https://power.larc.nasa.gov/data-access-viewer/)
pout= Pin×efficiency % (14) Where: Pout : Inverter output (W) Pin : Inverter input (W) Effisiensi : Inverter efficiency (%) Data Analysis 1.
Load The load specification data used in the design of the photovoltaic water pump system at Stella Maris Hospital Makassar is shown in Table 1.
Solar Radiation Irradiance data collection at Stella Maris Hospital Makassar with Latitude -5.147 / Longitude 119.403, with irradiance data obtained from NASA POWER for the year of 2022.
[8] POWER | Data Access Viewer (https://power.larc.nasa.gov/data-access-viewer/)