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Online since: May 2011
Authors: B.A. Adegboye, Olaitan Akinsanmi, G.A. Olarinoye, M.B. Soroyewun
The focus of the analysis is determining the effect of environmental factors such as temperature, pressure and relative humidity on the static electric field during the harmattan season.
The plots of the electrostatic field against the variation of the environmental factors were used as the qualitative analytical tools and yielded a non-linear relationship.
The study was conducted between February 2007-February 2009 at the Thermodynamics Laboratory of the Department of Mechanical Engineering, Ahmadu Bello University, Zaria, Nigeria, where room for adequate consideration of the electrodynamic properties of the fields under consideration could be explored.
The co-environmental factors to harmattan-temperature, pressure and relative humidity were also measured with a thermometer, barometer and hygrometer (dry and wet) respectively.
The non-linear relationship between the electrostatic field and the co-environmental factors can be seen from the three-dimensional plots.
The plots of the electrostatic field against the variation of the environmental factors were used as the qualitative analytical tools and yielded a non-linear relationship.
The study was conducted between February 2007-February 2009 at the Thermodynamics Laboratory of the Department of Mechanical Engineering, Ahmadu Bello University, Zaria, Nigeria, where room for adequate consideration of the electrodynamic properties of the fields under consideration could be explored.
The co-environmental factors to harmattan-temperature, pressure and relative humidity were also measured with a thermometer, barometer and hygrometer (dry and wet) respectively.
The non-linear relationship between the electrostatic field and the co-environmental factors can be seen from the three-dimensional plots.
Online since: April 2012
Authors: Chun Ling Chiang, C.M. Cheng, J.H. Liao, H.J. Lin, C.C. Yeh, J.Y. Hsieh, L.W. Yang, T.H. Yang, K.C. Chen, Chih Yuan Lu
It might be cause the electrical property of floating gate.
After polysilicon chemical mechanical polish (CMP) process, the void was still observed nearby or at the floating gate surface, as shown in the figure 1 (b and c).
The profile before fill-in is an important key factor that affects the void existing or not.
After polysilicon chemical mechanical polish (CMP) process, the void was still observed nearby or at the floating gate surface, as shown in the figure 1 (b and c).
The profile before fill-in is an important key factor that affects the void existing or not.
Online since: May 2018
Authors: Ming Zhi Zhu, Fei Yang
Bone scaffolds not only support bone at initial implantation and stimulate new bone tissue ingrowth and become completely integrated into the native tissue, but also achieves enough mechanical strength and cell-material interaction properties [5].
Osteogenic properties of scaffolds is known to be influenced by scaffold parameters such as mean pore size, porosity, pore interconnectivity, mechanical strength and elastic modulus of the base materials [10,11,12].
The sintering scheme, structural, mechanical and biological properties of the β-TCP scaffolds fabricated were investigated.
In contrast, the β-TCP scaffolds fabricated in this study had higher compressive strength, satisfying the requirement of the bone tissue scaffolds microstructure and mechanical properties, which was beneficial to bone repair and bone tissue ingrowth.
[25] C.H.Liu, Preparation and properties of porous scaffolds for calcium phosphate biocerates in bone tissue engineering, Master dissertation, Southeast University, China, 2004
Osteogenic properties of scaffolds is known to be influenced by scaffold parameters such as mean pore size, porosity, pore interconnectivity, mechanical strength and elastic modulus of the base materials [10,11,12].
The sintering scheme, structural, mechanical and biological properties of the β-TCP scaffolds fabricated were investigated.
In contrast, the β-TCP scaffolds fabricated in this study had higher compressive strength, satisfying the requirement of the bone tissue scaffolds microstructure and mechanical properties, which was beneficial to bone repair and bone tissue ingrowth.
[25] C.H.Liu, Preparation and properties of porous scaffolds for calcium phosphate biocerates in bone tissue engineering, Master dissertation, Southeast University, China, 2004
Online since: September 2013
Authors: Mohd Anuar Mohd Afzan, Ryuji Nagamine, Shunji Hirokawa, Mitsugu Todo
Kinetics and kinematics performance are two essential factors in the design of tibial insert of knee prosthesis.
Mobile tibial insert has been introduced to facilitate both design factors by increasing the contact area at the tibial plateau to reduce wear process, and to restore more natural knee motion by improving the kinematics performance associated with the range of motion (ROM) and tibial rotation [3,4].
Change in relative point of ligaments insertion will affect the mechanical response, results in different knee kinetics and kinematics [26].
Sakamoto, Mechanical properties of ultra high molecular weight polyethylene under impact compression-Property change with gamma irradiation and dynamic stress-strain analysis of artificial hip-joint, J Japanese Society for Experimental Mech. 3 (2003) 225-229
Andriacchi, Mechanical loads at the knee joint during deep flexion, J.
Mobile tibial insert has been introduced to facilitate both design factors by increasing the contact area at the tibial plateau to reduce wear process, and to restore more natural knee motion by improving the kinematics performance associated with the range of motion (ROM) and tibial rotation [3,4].
Change in relative point of ligaments insertion will affect the mechanical response, results in different knee kinetics and kinematics [26].
Sakamoto, Mechanical properties of ultra high molecular weight polyethylene under impact compression-Property change with gamma irradiation and dynamic stress-strain analysis of artificial hip-joint, J Japanese Society for Experimental Mech. 3 (2003) 225-229
Andriacchi, Mechanical loads at the knee joint during deep flexion, J.
Online since: January 2011
Authors: V. Swaminathan, M. Jayachandran, L.C. Nehru, C. Sanjeeviraja
Due to the different properties in the nanoscale materials such as optical property [3], magnetic property, electric property, thermal conductive property [4, 5], diffusive property [6, 7] and mechanical property [8], several nanoscale metals, ceramics and semiconductors are synthesized successively.
Nanoparticles synthesized using different methods may have different internal structures that affect the properties of materials consolidated from them.
The mechanical properties of nanocrystalline ceramics lead them to be called "ceramic steel" [31].
Reaction sintering is the welding together of small particles of a ceramic material applying prolonged heat below the melting point resulting in improved mechanical and physical properties of the material.
The stoichiometry of the reactant powder mixture is another important process parameter, which significantly affects the SHS reaction and product properties.
Nanoparticles synthesized using different methods may have different internal structures that affect the properties of materials consolidated from them.
The mechanical properties of nanocrystalline ceramics lead them to be called "ceramic steel" [31].
Reaction sintering is the welding together of small particles of a ceramic material applying prolonged heat below the melting point resulting in improved mechanical and physical properties of the material.
The stoichiometry of the reactant powder mixture is another important process parameter, which significantly affects the SHS reaction and product properties.
Online since: June 2015
Authors: Li Jun Fang, Tong Cao, Hong Kun Liu, Chang Li
Thermogravimetric Experimental Study on Combustion Performance of Co-firing of Sludge, Coal and Biomass in Micro-oxygen-rich Environment
Lijun FANG, Tong CAO*, Hongkun LIU , Chang LI
College of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding Hebei China, 071003
fanglijun2009@163.com, caotong2014@163.com
240019597@qq.com,1024248550@qq.com
Keywords: Sludge/Coal/Biomass; Micro-oxygen enrichment environment; Co-firing; Thermogravimetric analysis method
Abstract.
The caloric value from high to low ranks for lignite, biomass, sludge and can preliminarily forecast that sludge is easier to burn, but not burn completely and its combustion products may affect the combustion performance of mixed samples.
So the activation energy can be obtained by the slope and frequency factor can be obtained by the intercept.
There may be many reasons: Simplifying the reaction mechanism formula when calculating the activation energy, using a first-order reaction, but the actual reaction mechanism is very complex, the first order reaction not enough to fully response dynamic characteristics of sample; The activity different of sludge and coal and biomass in each main temperature range, the interaction between the various components, calculating the activation energy by using the whole temperature range , this affecting the accuracy of activation energy; compared to combustion reaction in the air, the mutual impact between the components increasing and the mutual independence decreasing because of the change of oxygen concentration in micro-oxygen-rich environment, thus affecting the reactivity of the sample.
Combustion of sludge coal water slurry and emission property of contaminants, J.
The caloric value from high to low ranks for lignite, biomass, sludge and can preliminarily forecast that sludge is easier to burn, but not burn completely and its combustion products may affect the combustion performance of mixed samples.
So the activation energy can be obtained by the slope and frequency factor can be obtained by the intercept.
There may be many reasons: Simplifying the reaction mechanism formula when calculating the activation energy, using a first-order reaction, but the actual reaction mechanism is very complex, the first order reaction not enough to fully response dynamic characteristics of sample; The activity different of sludge and coal and biomass in each main temperature range, the interaction between the various components, calculating the activation energy by using the whole temperature range , this affecting the accuracy of activation energy; compared to combustion reaction in the air, the mutual impact between the components increasing and the mutual independence decreasing because of the change of oxygen concentration in micro-oxygen-rich environment, thus affecting the reactivity of the sample.
Combustion of sludge coal water slurry and emission property of contaminants, J.
Online since: October 2014
Authors: Yue Jun Liu, Long Ouyang, Pu Shi, Fu Zhi Li, Lu Wang
The cross-linking Ethylene-vinyl acetate copolymer (EVA) foam material is non-toxic and it has good properties [10].
The measurement of rheological properties of polymeric materials under molten state is crucial to gain a fundamental understanding of the nature of the processability for polymers.
It relates with several factors such as the weight of filler, the strength of cells, the size and size distribution of cells and the proportion of closed cells, etc.
And from SEM experiments, it also confirmed that the properties of foam were affected by cells structure which influenced by the content of poplar wood powders.
The foam has good properties when AC foaming agent was 11 wt%, DCP cross-linking agent was 0.9 wt%.
The measurement of rheological properties of polymeric materials under molten state is crucial to gain a fundamental understanding of the nature of the processability for polymers.
It relates with several factors such as the weight of filler, the strength of cells, the size and size distribution of cells and the proportion of closed cells, etc.
And from SEM experiments, it also confirmed that the properties of foam were affected by cells structure which influenced by the content of poplar wood powders.
The foam has good properties when AC foaming agent was 11 wt%, DCP cross-linking agent was 0.9 wt%.
Online since: August 2013
Authors: Ling Shuang Wang, Shu Qin Yan, Ming Zhong Li
Carbodiimide induced silk fibroin to form Silk I crystal structure which was not affected by the presence of hyaluronic acid.
It is an attractive protein for biomedical applications due to its biocompatibility, biodegradability, self-assembly, mechanical stability, controllable structure and morphology.
Cell behavior on biomaterials is an important factor in evaluating the biocompatibility of a biomaterial.
It is generally known that the hydrophobicity/hydrophilicity of a material surface can affect the degree of cell adhesion and proliferation.
Through the introduction of HA, the hydrophobic protein in SF and the hydrophilicity of HA may achieve this balance of hydrophilic and hydrophobic properties at the surface of the blend films.
It is an attractive protein for biomedical applications due to its biocompatibility, biodegradability, self-assembly, mechanical stability, controllable structure and morphology.
Cell behavior on biomaterials is an important factor in evaluating the biocompatibility of a biomaterial.
It is generally known that the hydrophobicity/hydrophilicity of a material surface can affect the degree of cell adhesion and proliferation.
Through the introduction of HA, the hydrophobic protein in SF and the hydrophilicity of HA may achieve this balance of hydrophilic and hydrophobic properties at the surface of the blend films.
Online since: January 2004
Authors: Yuri M. Mishin, Akihiro Suzuki
(iii) How can the internal mechanical stresses
and thermal disorder affect GB diffusion?
Then, the next task is to study properties of such defects in the boundary.
Within this model, we can anticipate that external stresses can largely affect the stability of point defects in GBs.
Although the incorporation of the interstitial flux along GBs is unlikely to change the basic expression for the creep rate, the factors characterizing the diffusion flux in that expression may need to be modified.
Further studies of the structure and high-temperature properties of twist GBs, particularly with respect to diffusion, are highly desirable.
Then, the next task is to study properties of such defects in the boundary.
Within this model, we can anticipate that external stresses can largely affect the stability of point defects in GBs.
Although the incorporation of the interstitial flux along GBs is unlikely to change the basic expression for the creep rate, the factors characterizing the diffusion flux in that expression may need to be modified.
Further studies of the structure and high-temperature properties of twist GBs, particularly with respect to diffusion, are highly desirable.
Online since: December 2012
Authors: Maryam Mortazavi, Mojtaba Majlessi
Supplementary cementing materials are known to contribute to properties of strength and durability.
Silica Fume and Physical Properties.
Preliminary Research On The Properties of Lightweight Expanded Clay Aggregate, J.
Tanyildizi , “Statistical analysis for mechanical properties of polypropylene fiber reinforced lightweight concrete containing silica fume exposed to high temperature”, Materials & Design, Volume 30, Issue 8, September 2009, Pages 3252-3258
Martínez-Abella ,”Concretes with aggregates from demolition waste and silica fume, Materials and mechanical properties”, Building and Environment, Volume 43, Issue 4, April 2008, Pages429-437
Silica Fume and Physical Properties.
Preliminary Research On The Properties of Lightweight Expanded Clay Aggregate, J.
Tanyildizi , “Statistical analysis for mechanical properties of polypropylene fiber reinforced lightweight concrete containing silica fume exposed to high temperature”, Materials & Design, Volume 30, Issue 8, September 2009, Pages 3252-3258
Martínez-Abella ,”Concretes with aggregates from demolition waste and silica fume, Materials and mechanical properties”, Building and Environment, Volume 43, Issue 4, April 2008, Pages429-437