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Online since: September 2011
Authors: Mahuya Chakrabarti, S. Chattopadhyay, D. Sanyal, A. Sarkar, D. Jana
Introduction
Since few decades, oxides like conductors, insulators or semiconductors may draw huge attentions due to their interesting electrical, optical and mechanical properties.
Considering the above all properties, 22Na source is the most suitable positron (b+) source for the positron annihilation experiments.
Each polymorph possesses different crystal structures as well as different electrical, optical and mechanical properties.
It gives very precise information about the chemical, structural and magnetic properties of a material.
These are the two factors limiting the number of isotopes that can be used successfully for Mössbauer spectroscopy.
Considering the above all properties, 22Na source is the most suitable positron (b+) source for the positron annihilation experiments.
Each polymorph possesses different crystal structures as well as different electrical, optical and mechanical properties.
It gives very precise information about the chemical, structural and magnetic properties of a material.
These are the two factors limiting the number of isotopes that can be used successfully for Mössbauer spectroscopy.
Online since: February 2026
Authors: Paul Jhon G. Eugenio, John Marc Ganzon
Furthermore, notable enhancements in the physicochemical properties of the poultry wastewater, including temperature and pH, were also documented.
This design allowed systematic evaluation of how varying cellulose, zeolite, and nano-silica contents influence the adsorption properties of the bio-composites.
Elemental composition was determined using a Bruker Instruments EDS detector, with spectra collected over an energy range of 0–20 keV to identify major elements contributing to the adsorptive properties of the material.
Effect of fiber treatment condition and coupling agent on the mechanical and thermal properties in highly filled composites of sugarcane bagasse fiber/PP.
Natural and modified zeolite clinoptilolite with antimicrobial properties: a review.
This design allowed systematic evaluation of how varying cellulose, zeolite, and nano-silica contents influence the adsorption properties of the bio-composites.
Elemental composition was determined using a Bruker Instruments EDS detector, with spectra collected over an energy range of 0–20 keV to identify major elements contributing to the adsorptive properties of the material.
Effect of fiber treatment condition and coupling agent on the mechanical and thermal properties in highly filled composites of sugarcane bagasse fiber/PP.
Natural and modified zeolite clinoptilolite with antimicrobial properties: a review.
Online since: October 2023
Authors: Cheng Zhou, Dong Po Xuan, Tian Liang Jiang, Li Peng, Wen Hao Fan, You Zhou
One of the main factors that influence the industrialization of TRC to cast steel is the strip quality and the process stability [4, 6].
In the process of TRC, the molten steel level affects the heat transfer process between the molten steel and the rolls, and then the solidification process of the molten steel.
Due to the radiation leakage caused by radiation penetration that can affect the human body, it is rarely used in production environments with human participation.
Hirt, Twin-roll strip casting: a competitive alternative for the production of high-manganese steels with advanced mechanical properties, Mater.
In the process of TRC, the molten steel level affects the heat transfer process between the molten steel and the rolls, and then the solidification process of the molten steel.
Due to the radiation leakage caused by radiation penetration that can affect the human body, it is rarely used in production environments with human participation.
Hirt, Twin-roll strip casting: a competitive alternative for the production of high-manganese steels with advanced mechanical properties, Mater.
Online since: March 2015
Authors: Ke Cheng Liu, Hong Shan Zhang, Xiao Long, Jia Qiang Wei
Study of Screening Reverse Osmosis Menmbrane Anti-scaltants
by Drainage Gradient Method
Hongshan Zhang1,a, Jiaqiang Wei2,b, Kecheng Liu3,c, Xiao Long3,d
1Hebei Electric Power Design & Research Institute, Shijiazhuang, 050031,China
2 School of Power and Mechanical Engineering, Wuhan University, Wuhan, 430072,China
3 State Grid Hebei Electric Power Research Institute, Shijiazhuang, 050021,China
aemail: jjzhsh@126.com, bemail: weijiaqiang20085@163.com, cemail: hbdyylkc@163.com,
demail: 13832168901@126.com
Keywords: Drainage gradient Reverse osmosis Anti-scaltants Evaluation method introduction
Abstract.
If the solubility limits of a sparingly soluble salt is exceeded, scale precipitation will clog the membrane and affect the operation of RO system.
The two factors add up to plots of pH~KCl as shown in Fig.5.
Xiang, Property evaluation of polyepoxysuccinic acid with conductometric titration method,Therm.
If the solubility limits of a sparingly soluble salt is exceeded, scale precipitation will clog the membrane and affect the operation of RO system.
The two factors add up to plots of pH~KCl as shown in Fig.5.
Xiang, Property evaluation of polyepoxysuccinic acid with conductometric titration method,Therm.
Online since: July 2017
Authors: Yan De Liang, Fu Ben He, Roberto Bortoletto, Enrico Pagello
Although to apply a bio-inspired actuator can enhance the capabilities of robot in locomotion, the mechanical structure and control system still seem to be complex to develop.
A virtual model of the human musculoskeletal system that represents the kinematics of joints [7], the geometry of bones, the three-dimensional organization and force-generating properties of lower limb muscles [8,9] are modeled.
Since joint elasticity does not affect the kinematic measures and the segmented links are rigid, the kinematics of robot model can be described by Denavit-Hartenberg (DH) parameters, as illustrated in Fig. 6.
Zajac, Muscle and Tendon Properties Models Scaling and Application to Biomechanics and Motor Control, Critical Reviews in Biomedical Engineering, 17 (1989) 359-410
Hollander Comparison of Mechanical Design and Energy Consumption of Adaptable, Passive-compliant Actuators, The Int.
A virtual model of the human musculoskeletal system that represents the kinematics of joints [7], the geometry of bones, the three-dimensional organization and force-generating properties of lower limb muscles [8,9] are modeled.
Since joint elasticity does not affect the kinematic measures and the segmented links are rigid, the kinematics of robot model can be described by Denavit-Hartenberg (DH) parameters, as illustrated in Fig. 6.
Zajac, Muscle and Tendon Properties Models Scaling and Application to Biomechanics and Motor Control, Critical Reviews in Biomedical Engineering, 17 (1989) 359-410
Hollander Comparison of Mechanical Design and Energy Consumption of Adaptable, Passive-compliant Actuators, The Int.
Online since: June 2013
Authors: Nicolae Cordos, Adrian Todorut, István Barabás
The main properties of the tested fuels (density, kinematic viscosity, oxidation stability, acid value, peroxide number, coke content, water content and cetane number) have been determined.
One is to convert vegetable oil in a product with similar properties to diesel fuel (oil changes chemical structure).
The main properties of the tested fuels have been determined and are presented in Table 1.
Viscosity affects the engine system supply and the fuel spraying process into the combustion chamber.
The determination of the chemical and physical properties of the bio-fuels has been achieved in order to notice their significant differences relative to the diesel fuel.
One is to convert vegetable oil in a product with similar properties to diesel fuel (oil changes chemical structure).
The main properties of the tested fuels have been determined and are presented in Table 1.
Viscosity affects the engine system supply and the fuel spraying process into the combustion chamber.
The determination of the chemical and physical properties of the bio-fuels has been achieved in order to notice their significant differences relative to the diesel fuel.
Online since: February 2019
Authors: Van Thuan Le, Hoang Sinh Le, Dinh Hien Ta, Hoai Thuong Nguyen, Van Dat Doan
Heavy metal ions can be introduced into the body and accumulated inside it through the consumption of contaminated foods, seriously affecting human health [3, 4].
The average crystallite size of nCDHA samples was calculated by the Scherrer formula: where d is the crystallite size (nm); k is the dimensional factor taken as 0.89; l is the X-ray wavelength (0.154 nm); b is the half-width at half-maximum intensity (in radians); q is the Bragg angle (in degrees). 2.4.
The experiments were conducted using the batch technique by adding 0.1 g of nCDHA into a series of 150 mL conical flask containing 50 mL solution with different concentrations of heavy metal ions and were shaken in a mechanical shaker for 2 hours at room temperature.
The Freundlich model is an empirical equation, which describes a multi-site adsorption on energetically heterogeneous surfaces as follows: where KF and n are Freundlich constants, corresponding to maximum adsorption capacity (mg/g) and the heterogeneity factor, respectively.
Isabel, Overall Aspects of Non-Traditional Glasses: Synthesis, Properties and Applications, Bentham Science Publishers, 2016
The average crystallite size of nCDHA samples was calculated by the Scherrer formula: where d is the crystallite size (nm); k is the dimensional factor taken as 0.89; l is the X-ray wavelength (0.154 nm); b is the half-width at half-maximum intensity (in radians); q is the Bragg angle (in degrees). 2.4.
The experiments were conducted using the batch technique by adding 0.1 g of nCDHA into a series of 150 mL conical flask containing 50 mL solution with different concentrations of heavy metal ions and were shaken in a mechanical shaker for 2 hours at room temperature.
The Freundlich model is an empirical equation, which describes a multi-site adsorption on energetically heterogeneous surfaces as follows: where KF and n are Freundlich constants, corresponding to maximum adsorption capacity (mg/g) and the heterogeneity factor, respectively.
Isabel, Overall Aspects of Non-Traditional Glasses: Synthesis, Properties and Applications, Bentham Science Publishers, 2016
Online since: June 2006
Authors: Tarriq Munir, Azlan Abdul Aziz, Mat Johar Abdullah, Naser Mahmoud Ahmed
The current by drift process can take place
by three main mechanisms: thermionic emission of carrier across the schottky barrier, thermionic
field emission, quantum mechanical tunneling through the barrier.
The quantum mechanical tunneling through the barrier takes into account the wave nature of the electron allowing them to penetrate through thin barrier.
The other factor which affects the design of the schottky diode performance is epi layer thickness, metal contact work function.
Structure of GaN Schottky diode [23] Table 1 Important parameter used in simulation at (300K) [23] Material Property Value GaN Relative Permittivity 8.9 Energy band gap 3.45[ev] Electron affinity 3.3 Saturation velocity 1.5×107 Electron mobility 1000[cm 2v/s] Platinum Schottky contact Work function 5.6[ev] Barrier height 1.2[ev] 0 1 2 3 4 5 6 7 8 0 0.5 1 1.5 2 2.5 V(volt) I(A) n=1e12cm-3 n=1e14cm-3 n=1e15cm-3 Fig. 2 Forward I-V characteristics 0 500 1000 1500 0 0.5 1 1.5 2 2.5 V(volt) I(A) n=1e16cm-3 n=1e17cm-3 n=1e18cm-3 Fig. 3 Forward I-V characteristics Results and Discussions The electrical conductivity of a semiconductor depends on the carrier concentration and their mobility and hence on the concentration of impurities
The quantum mechanical tunneling through the barrier takes into account the wave nature of the electron allowing them to penetrate through thin barrier.
The other factor which affects the design of the schottky diode performance is epi layer thickness, metal contact work function.
Structure of GaN Schottky diode [23] Table 1 Important parameter used in simulation at (300K) [23] Material Property Value GaN Relative Permittivity 8.9 Energy band gap 3.45[ev] Electron affinity 3.3 Saturation velocity 1.5×107 Electron mobility 1000[cm 2v/s] Platinum Schottky contact Work function 5.6[ev] Barrier height 1.2[ev] 0 1 2 3 4 5 6 7 8 0 0.5 1 1.5 2 2.5 V(volt) I(A) n=1e12cm-3 n=1e14cm-3 n=1e15cm-3 Fig. 2 Forward I-V characteristics 0 500 1000 1500 0 0.5 1 1.5 2 2.5 V(volt) I(A) n=1e16cm-3 n=1e17cm-3 n=1e18cm-3 Fig. 3 Forward I-V characteristics Results and Discussions The electrical conductivity of a semiconductor depends on the carrier concentration and their mobility and hence on the concentration of impurities
Online since: September 2014
Authors: Vasyl Martsynkovskyy, Viacheslav Tarelnyk
It should be noted that in case of SPD of hardened by EEA layers, such characteristic of their physical and mechanical properties is more physically substantiated and convenient, as it defines actually the layer hardenability in the process of SPD method, and therefore the change of operational properties of this layer.
Influence of the Main Technological SPD Parameters on Microgeometry, Structure and Properties of EEA Layers The mentioned above determination of SPD force and deformation parameters of the EEA layers of different hardness allowed to generalize the research results of the surface layer microgeometry, its structure and properties.
Obviously, SPD hardening affects here.
With ball burnishing specific force increase, the mechanical hardening of the surface layer takes place, which becomes a significant factor with increase of the layer depth.
Consequently according to the results of experimental researches of the main technological parameters of SPD method influence on microgeometry, structure and properties of EEA layers, the following conclusion should be made: 1.
Influence of the Main Technological SPD Parameters on Microgeometry, Structure and Properties of EEA Layers The mentioned above determination of SPD force and deformation parameters of the EEA layers of different hardness allowed to generalize the research results of the surface layer microgeometry, its structure and properties.
Obviously, SPD hardening affects here.
With ball burnishing specific force increase, the mechanical hardening of the surface layer takes place, which becomes a significant factor with increase of the layer depth.
Consequently according to the results of experimental researches of the main technological parameters of SPD method influence on microgeometry, structure and properties of EEA layers, the following conclusion should be made: 1.
Online since: July 2020
Authors: B. Gunnar Malm, Carl Mikael Zetterling, Mattias Ekström
Transistors with large aspect ratios (100/2) and relatively
long pulses with rise and fall times (>1 µs) were used to reduce the influence of the geometric factor
[8, 3, 5].
Eq. 4 reduces to Eq. 5 for the highlow case,Fig. 3: Simulated quantum mechanical system.
Most material properties are software default values the potential barrier was set to ∼2.7 eV, by setting the electron affinity of SiO2 to 0.95 eV and 4HSiC to 3.65 eV, based on the result of Afanas'ev et al. [19]. a) Potential well and the first four eigenenergies.
The rough charge pumping estimates gave median results that were in good agreement with the fine frequency measurements, which indicates that the highlow approach may be suitable for automatic extraction of MOS interface properties.
Charge pumping is a suitable method for automatic extraction of defect densities, and ultrafast pulsedTable 3: Properties measured from transistors (100 µm width, 2 µm length), estimated at 200 ◦C.
Eq. 4 reduces to Eq. 5 for the highlow case,Fig. 3: Simulated quantum mechanical system.
Most material properties are software default values the potential barrier was set to ∼2.7 eV, by setting the electron affinity of SiO2 to 0.95 eV and 4HSiC to 3.65 eV, based on the result of Afanas'ev et al. [19]. a) Potential well and the first four eigenenergies.
The rough charge pumping estimates gave median results that were in good agreement with the fine frequency measurements, which indicates that the highlow approach may be suitable for automatic extraction of MOS interface properties.
Charge pumping is a suitable method for automatic extraction of defect densities, and ultrafast pulsedTable 3: Properties measured from transistors (100 µm width, 2 µm length), estimated at 200 ◦C.