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Online since: December 2014
Authors: Maria Campos Romero, Sandro Fábio César, Rita Dione Araújo Cunha
Workability, abundance of raw material in certain parts of the world and ease production of the brick are factors that made this technical solution interesting to be disseminated around the world in order to fulfill demands for habitation.
Interaction among factors such as dimensions, corrections, cures and stabilization, contributes for final adobe brick’s performance.
A foundation can be built with materials to avoid that this humidity affects the walls.
The bricks drying time was different in all constructions and this fact indicates that – depending on factors as local temperature, conditions for the cure (under the sun or in shade) and dimensions of the brick – this ideal time for drying can vary.
Evaluation of physical and mechanical properties of adobe (Bricks of raw earth).
Interaction among factors such as dimensions, corrections, cures and stabilization, contributes for final adobe brick’s performance.
A foundation can be built with materials to avoid that this humidity affects the walls.
The bricks drying time was different in all constructions and this fact indicates that – depending on factors as local temperature, conditions for the cure (under the sun or in shade) and dimensions of the brick – this ideal time for drying can vary.
Evaluation of physical and mechanical properties of adobe (Bricks of raw earth).
Online since: December 2014
Authors: Hai Rong Guo, Gui Ping Xu, Li Jun Chen, Xiao Fei Wang, Meng Meng Wei
In recent years, many researchers have study the effect of sugarcane vinasse to the agronomic traits of sugarcane[3,4], yield and quality of sugarcane[5,6], the optimal restitution amount [3], physical and chemical properties of soil[7,8] and biological characters of sugarcane field[9,10,11], while the effect of different layers and vertical distribution characteristics of sugarcane soil by using sugarcane vinasse are rarely reported.
Besides, 1.5 is the conversion factor which can eliminate changes of background value caused by rock difference.
It is concluded that using sugarcane vinasse can reduce the pH value of sugarcane fields and affect to a certain soil depth.
In addition, sugarcane vinasse was used in liquid, so it had better penetration ability and could be affected to a certain depth.
Furthermore, the mechanical entrapment of soil, fixed of organic matters and adsorbed of soil colloids will generate blocking effect on the migration of Cu.
Besides, 1.5 is the conversion factor which can eliminate changes of background value caused by rock difference.
It is concluded that using sugarcane vinasse can reduce the pH value of sugarcane fields and affect to a certain soil depth.
In addition, sugarcane vinasse was used in liquid, so it had better penetration ability and could be affected to a certain depth.
Furthermore, the mechanical entrapment of soil, fixed of organic matters and adsorbed of soil colloids will generate blocking effect on the migration of Cu.
Online since: June 2014
Authors: Mihai Berteanu, Ileana Ciobanu, Alina Nela Iliescu, Andreea Georgiana Marin, Petre Lucian Seiciu, Ruxandra Ileana Badea
The objectives of the physical therapy intervention program must be tailored according to the degree of disability presented by the patient, to the range of the impairments affecting gait and converging to the disability, to his/her physical and psychological resources, as well as to the individual consideration for a good quality of life.
Gait is disturbed, impaired and even impossible in some medical conditions, and the contextual personal and environmental factors may improve or may worsen the walking ability of the person /13/.
Arch Phys Med Rehabil. 1978 Mar;59(3):124-33, [6] Marie-Louise Bird et al.: Age-Related Changes in Physical Fall Risk Factors: Results from a 3 Year Follow-up of Community Dwelling Older Adults in Tasmania, Australia.
[19] Lord S. et al.: Gait variability in older adults: a structured review of testing protocol and clinimetric properties.
Pages:434-437 [23] Chutima Jalayondeja et al: Factors related to community participation by stroke victims six month post-stroke.
Gait is disturbed, impaired and even impossible in some medical conditions, and the contextual personal and environmental factors may improve or may worsen the walking ability of the person /13/.
Arch Phys Med Rehabil. 1978 Mar;59(3):124-33, [6] Marie-Louise Bird et al.: Age-Related Changes in Physical Fall Risk Factors: Results from a 3 Year Follow-up of Community Dwelling Older Adults in Tasmania, Australia.
[19] Lord S. et al.: Gait variability in older adults: a structured review of testing protocol and clinimetric properties.
Pages:434-437 [23] Chutima Jalayondeja et al: Factors related to community participation by stroke victims six month post-stroke.
Online since: March 2008
Authors: Larry L. Hench, Julia M. Polak
A critical increase in cell mass is
required and synthesis and activation of various growth factors is necessary for the G2-M transition.
Activation of several immediate early response genes and synthesis of growth factors is likely to modulate the cell cycle response of osteoblasts to Bioglass.
The transcription factors that were activated include c-jun, fra-1 and c-myc, three well characterised osteoblast transcription factors.
Thus, osteocytes represent the cell population responsible for extracellular matrix production and mineralisation, the final step in bone development and probably the most crucial one given the importance of collagen-hydroxyl carbonate apatite (HCA) bonding in determining the biomechanical properties of bone.
Hench,'Factors Affecting the Structure and Properties of Bioactive Foam Scaffolds for Tissue Engineering', Journal of Biomedical Materials Research Part B-Applied Biomaterials, 68B (2004), 36-44. 64.
Activation of several immediate early response genes and synthesis of growth factors is likely to modulate the cell cycle response of osteoblasts to Bioglass.
The transcription factors that were activated include c-jun, fra-1 and c-myc, three well characterised osteoblast transcription factors.
Thus, osteocytes represent the cell population responsible for extracellular matrix production and mineralisation, the final step in bone development and probably the most crucial one given the importance of collagen-hydroxyl carbonate apatite (HCA) bonding in determining the biomechanical properties of bone.
Hench,'Factors Affecting the Structure and Properties of Bioactive Foam Scaffolds for Tissue Engineering', Journal of Biomedical Materials Research Part B-Applied Biomaterials, 68B (2004), 36-44. 64.
Online since: December 2012
Authors: Wei Jiang, Jian Xin Jin, Hung Chien Do
Table 1 Principal dimensions of hypothetical object ship
Item
Magnitude
Length of overall, LO.A [m]
362.000
Length of between perpendiculars, LB.P [m]
360.000
Length scantling, Ls [m]
360.000
Breadth, B[m]
65.000
Depth, D[m]
30.000
Designed draught, d [m]
21.500
Scantling draught, ds[m]
23.000
Block coefficient, CB
0.870
In this paper, the nomenclature of stiffened plate structures are shown in Fig. 1(a) and the geometric properties of outer bottom structures are in Table 1 for CSR method and pre-CSR method.
σiu=σiE for σiE≤0.5σYeqσYeq1-σYeq4σiEfor σiE>0.5σYeq (2) Table 2 Geometric properties of the outer bottom stiffened panel (as designed by CSR rules) Items a (mm) b(mm) ns t(mm) hw(mm) tw(mm) bf (mm) tf(mm) Pre-CSR method 3500 915 27 18.53 420 10 172 16 CSR method 3500 915 27 21.80 470 10 162 16 Boundary conditions.Using ANSYS nonlinear FEA, the model of a half plus one plus half - bay (½ + 1 + ½ - bay model) is available for these panels in terms of geometric properties and structural behavior.
(a) Simply supported, (b) Clamped (amplification factor of 50).
Yan, Dynamic characteristic analysis of precise long stroke linear motor with air-bearing in optical lithography, Chinese Journal of Mechanical Engineering (English Edition), 21(2008)17-22
Chen, The study on boundary conditions to the effect of mode analysis in FEA, China Mechanical Engineering, 19(2008)1083-1086
σiu=σiE for σiE≤0.5σYeqσYeq1-σYeq4σiEfor σiE>0.5σYeq (2) Table 2 Geometric properties of the outer bottom stiffened panel (as designed by CSR rules) Items a (mm) b(mm) ns t(mm) hw(mm) tw(mm) bf (mm) tf(mm) Pre-CSR method 3500 915 27 18.53 420 10 172 16 CSR method 3500 915 27 21.80 470 10 162 16 Boundary conditions.Using ANSYS nonlinear FEA, the model of a half plus one plus half - bay (½ + 1 + ½ - bay model) is available for these panels in terms of geometric properties and structural behavior.
(a) Simply supported, (b) Clamped (amplification factor of 50).
Yan, Dynamic characteristic analysis of precise long stroke linear motor with air-bearing in optical lithography, Chinese Journal of Mechanical Engineering (English Edition), 21(2008)17-22
Chen, The study on boundary conditions to the effect of mode analysis in FEA, China Mechanical Engineering, 19(2008)1083-1086
Online since: June 2022
Authors: Eric Häntzsche, Chokri Cherif, Jens Wagner, Florian Wieczorek, Hans Winger, Philippa Ruth Christine Böhnke, Iris Kruppke, Andreas Nocke
Use properties of electrically conductive yarns such as washability [4 – 6] have already been investigated and are not the focus of the investigations here.
The silver coating (which generates the electrical conductivity) of yarn Y1 is inevitably more susceptible to abrasion [13], compared to a yarn that gets its electrical properties from the fiber material alone.
Another significant influencing factor is the use of the binding elements.
However, this is necessary to develop sensors with improved usage properties.
Koncar: Launderability of Conductive Polymer Yarns Used for Connections of E-textile Modules: Mechanical Stresses.
The silver coating (which generates the electrical conductivity) of yarn Y1 is inevitably more susceptible to abrasion [13], compared to a yarn that gets its electrical properties from the fiber material alone.
Another significant influencing factor is the use of the binding elements.
However, this is necessary to develop sensors with improved usage properties.
Koncar: Launderability of Conductive Polymer Yarns Used for Connections of E-textile Modules: Mechanical Stresses.
Online since: December 2024
Authors: Glenn Ongayo, Phoebe Ann Magallanes
Batch adsorption tests were done for both adsorbents in order to determine the effects of various factors, such as pH, adsorbent dosage, and contact time.
To ascertain the effectiveness and identify significant differences between the factors applied to the adsorbent, the kinetics and equilibrium adsorption of the GO and EGO was calculated.
Sufficient contact time is necessary to achieve equilibrium, with optimal times depending on the other two factors.
Other variables such as temperature (298 K), initial concentration (25 ppm), volume (25 mL), and the rate of mechanical stirring (300 rpm) are consistent unless otherwise stated.
Du, EDTA functionalized magnetic graphene oxide for removal of Pb(II), Hg(II) and Cu(II) in water treatment: adsorption mechanism and separation property, Chem.
To ascertain the effectiveness and identify significant differences between the factors applied to the adsorbent, the kinetics and equilibrium adsorption of the GO and EGO was calculated.
Sufficient contact time is necessary to achieve equilibrium, with optimal times depending on the other two factors.
Other variables such as temperature (298 K), initial concentration (25 ppm), volume (25 mL), and the rate of mechanical stirring (300 rpm) are consistent unless otherwise stated.
Du, EDTA functionalized magnetic graphene oxide for removal of Pb(II), Hg(II) and Cu(II) in water treatment: adsorption mechanism and separation property, Chem.
Online since: September 2017
Authors: Jovan Trajkovski
Properties of the numerical models used for model validation are presented in Table 1.
Since no symmetry can be used in the model with LAV, the fluid domain mesh was refined toward the ignition point of the charge using the biasing factor of 4, in order to reduce the model size as well as to ensure the validated blast wave loading parameters [7].
Table 2 Material properties and linear polynomial EOS parameters for air r (kg/m3) g C0 C1-C3, C6 C4,C5 E0 (J) V0 (/) 1.29 1.4 -1x10-6 0 0.4 2.5x105 1 Explosive charge The explosive charge in the model is presented with *MAT_HIGH_EXPLOSIVE_BURN in combination with the Jones-Wilkins-Lee (JWL) equation of state (EOS) , (2) which calculates blast pressure as a function of relative volume n=r0/r and internal energy E, for an explosive element.
Table 3 Material properties and JWL parameters for TNT [34] r(kg/m3) D(m/s) PCJ(GPa) A(GPa) B(GPa) R1(-) R2(-) w(-) E(J/m3) 1590 6930 21.0 3.712 3.231 4.15 0.95 0.3 7*109 PROTAC 500 PROTAC 500 is a low carbon high-strength steel which is complexly alloyed with Si (1.01 m. %), Cr (0.69 m. %), Mo (0.33 m. %), and microalloyed with Ti (0.027 m. %) and B (0.002 m. %) [35, 36].
Journal of Mechanical Engineering. 2012;58
Since no symmetry can be used in the model with LAV, the fluid domain mesh was refined toward the ignition point of the charge using the biasing factor of 4, in order to reduce the model size as well as to ensure the validated blast wave loading parameters [7].
Table 2 Material properties and linear polynomial EOS parameters for air r (kg/m3) g C0 C1-C3, C6 C4,C5 E0 (J) V0 (/) 1.29 1.4 -1x10-6 0 0.4 2.5x105 1 Explosive charge The explosive charge in the model is presented with *MAT_HIGH_EXPLOSIVE_BURN in combination with the Jones-Wilkins-Lee (JWL) equation of state (EOS) , (2) which calculates blast pressure as a function of relative volume n=r0/r and internal energy E, for an explosive element.
Table 3 Material properties and JWL parameters for TNT [34] r(kg/m3) D(m/s) PCJ(GPa) A(GPa) B(GPa) R1(-) R2(-) w(-) E(J/m3) 1590 6930 21.0 3.712 3.231 4.15 0.95 0.3 7*109 PROTAC 500 PROTAC 500 is a low carbon high-strength steel which is complexly alloyed with Si (1.01 m. %), Cr (0.69 m. %), Mo (0.33 m. %), and microalloyed with Ti (0.027 m. %) and B (0.002 m. %) [35, 36].
Journal of Mechanical Engineering. 2012;58
Online since: June 2011
Authors: Ke You Guo, Song Ye, Hu Ming Jiang, Chun Yu Zhang, Kai Han
An Algorithm Based On SURF for Surveillance Video Mosaicing*
GUO Keyou1, a YE Song2, b JIANG Huming1, c ZHANG Chunyu3, d HAN Kai1, e
1College of Mechanical Engineering, Beijing Technology and Business University, Beijing, China
2 Automotive Transportation Technology Research Center, Research Institute of Highway, National Center of ITS Engineering & Technology, Beijing, China
3 Key Laboratory of Intelligent Transportation Systems Technologies, Research Institute of Highway, Center of ITS Engineering & Technology, Beijing, China
aguoky@th.btbu.edu.cn, baaron929@sohu.com, cjianghuming@126.com, dzcy@itsc.com.cn, ehankai@163.com
Key words: Machine Vision; Video Mosaicing; SURF; Homography Matrix
Abstract: Using the SIFT algorithm for image mosaicing is the study hotspot in recent years, which is in a wide range of applications.
SURF Algorithm Document [11] mentioned that we can extracts feature points with SURF method, which based on SIFT algorithm, used integral image for replacing image convolution, and used the mathematical properties of Hessian matrix for testing eigen values.
Although the quality of extracting feature points is affected to a certain degree, with the greatly improvement of the algorithm speed, realizing the real-time mosaicking has become possible.
Supposing I is a level in the space, whose imaging under two viewpoints are I1 , I2, making , be any pair of corresponding points, image transformation relation is showed by formula (1) : (1) where S is nonzero scale factor, the formula for the calculation of H is as follows: (2) where H is called the homography matrix for the image (I1, I2) about level I.
According to the property of homography matrix, a good performance homography matrix allows two images to be spliced together perfectly.
SURF Algorithm Document [11] mentioned that we can extracts feature points with SURF method, which based on SIFT algorithm, used integral image for replacing image convolution, and used the mathematical properties of Hessian matrix for testing eigen values.
Although the quality of extracting feature points is affected to a certain degree, with the greatly improvement of the algorithm speed, realizing the real-time mosaicking has become possible.
Supposing I is a level in the space, whose imaging under two viewpoints are I1 , I2, making , be any pair of corresponding points, image transformation relation is showed by formula (1) : (1) where S is nonzero scale factor, the formula for the calculation of H is as follows: (2) where H is called the homography matrix for the image (I1, I2) about level I.
According to the property of homography matrix, a good performance homography matrix allows two images to be spliced together perfectly.
Online since: March 2014
Authors: Xian Feng Tan, Cheng Long Yu, Bao Hua Xie
In spite of the challenges of titanium, titanium alloy and the new composite materials, but it still as the main material of various mechanical structures in aircraft [1-3].
However, dynamic recrystallization during thermoplastic deformation leads to grain coarsening, affects parts forming process.
Simulation parameters were set as follows: the punch stroke 60mm, extrusion speed 1mm/s, 200 simulation steps, the step size 0.3mm, element numbers 8000, boundary friction factor 0.12, the extrusion temperature 20 °C.
The narrower the shear zone, the closer to the ideal of a simple deformation of shear, thus it can better control the microstructure and properties of materials.
Aluminum Fabrication, 2008,6(158):43-45 [4] Dixit M, Mishra K R S, Structure-property correlations in Al 7050 and Al 7055 high-strength aluminum alloys [J].
However, dynamic recrystallization during thermoplastic deformation leads to grain coarsening, affects parts forming process.
Simulation parameters were set as follows: the punch stroke 60mm, extrusion speed 1mm/s, 200 simulation steps, the step size 0.3mm, element numbers 8000, boundary friction factor 0.12, the extrusion temperature 20 °C.
The narrower the shear zone, the closer to the ideal of a simple deformation of shear, thus it can better control the microstructure and properties of materials.
Aluminum Fabrication, 2008,6(158):43-45 [4] Dixit M, Mishra K R S, Structure-property correlations in Al 7050 and Al 7055 high-strength aluminum alloys [J].