finite element modeling of the spine
Patient specific finite element modeling of the human lumbar motion segment
... 5.2 The effect of Poisson’s ratio of the disc nucleus on the axial stiffness of the lumbar motion segment 60 Fig 5.3 The effect of Young’s Modulus of the disc nucleus on the axial stiffness of the ... bone However, the model was built with the assumption of axis-symmetry of the spine and did not include the posterior elements which are an integral part of the spine anatomy Therefore these two ... description on the fundamentals of spine anatomy which is important to the understanding of the subsequently presented works Literature reviews on the finite element modeling of the lumbar motion...
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Finite element modeling of hybrid fiber ECC targets subjected to impact and blast
... FINITE ELEMENT MODELING OF HYBRID-FIBER ECC TARGETS SUBJECTED TO IMPACT AND BLAST LEE SIEW CHIN (B Eng (Hons), UTM) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF ... that the FE model closely predicted the residual velocity of projectile, size of perforation hole and exit crater for the perforation cases For the penetration cases, the application of the modified ... on the response of the panels is investigated and discussed In the absence of field test data, the equivalent SDOF method based on codes of practice for blast analysis is adopted to verify the...
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FINITE ELEMENT MODELING AND SIMULATION OF THE GRINDING PROCESS mô HÌNH hóa và mô PHỎNG QUÁ TRÌNH mài BẰNG PHƯƠNG PHÁP PHẦN tử hữu hạn
... single grit grinding The above behaviour of the cutting force can be explained by the depth of penetration of the grit into the workpiece At the beginning, the penetration of the grit is still negligible, ... layers have 720 elements each, while the last two contain 360 elements each The lengths of elements in these layers are correspondingly 3.2 and 6.4 µm The height of elements in the same layer ... layers consist of 1440 elements of length 1.6 µm The ratio between the heights of elements in successive layers of the first five is 0.9 The remaining four layers are meshed with larger elements Two...
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finite element analysis of fracture in concrete structures state of the art
... the first to apply the concepts of fracture mechanics to concrete beams With the advent of computers in the 1940s, and the subsequent rapid development of the finite element method (FEM) in the ... be taken of the size of the heterogeneous structure of the material This implies that the maximum size of finite elements used to model strain softening behavior should be linked to the aggregate ... (2.15) in which [ Kc ] is the element stiffness matrix of an element bei tween the contours Γo and Γ1, and Nc is the number of such elements The derivatives of the element stiffness matrices...
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Tài liệu Báo cáo Y học: Molecular modeling of the dimeric structure of human lipoprotein lipase and functional studies of the carboxyl-terminal domain docx
... illustrates the overall saddle shape of the dimeric structure and the key heparin-binding residues in the N-terminal domain held coordinately by the two subunits on the top of the hollow (Fig 1A) The ... established Of two possible dimeric structures of LPL, the head-tohead and the head-to-tail models, the studies of the chimeric proteins of hepatic lipase and LPL and the tandem repeat approach of LPL ... peak of wild-type LPL The LPL in the eluate was detected by Western blot with LPL polyclonal antibody 7640 The fraction number of the high-affinity peak was the same for the wild type and the WW...
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Multilevel modeling of the influence of surface transport peculiarities on growth, shaping, and doping of si nanowires
... diffusion of silicon atoms from the surface to the catalyst/NW interface Here, h is the height of the NW and O is the atomic volume of a silicon atom in a silicon lattice, the factor is the ratio of the ... equations describing the growth of NWs The second two MC experiments reproduce a fragment of a Fig The MC simulations of the kinetics for spreading of the mobile atoms across the surface in a two-component ... but by the direct adsorption of molecules to the vacant sites located in the very peripheral region of a catalyst particle The width of the region gradually decreases with the increase in the input...
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modeling of the conduction in a wo3 thin film as ozone sensor
... in the atmosphere, the influence of another gas is not studied The action of oxygen is first analyzed, then the ozone one The combined action of the two mixed gases is finally studied at the end of ... case, the interaction between the semiconductor material and the gases is approached by means of the adsorption theory of Wolkenstein in order to determine the equilibrium state of the grains The ... the first step, the bond between the adsorbate and the substrate is weak and does not involve electronic transfer, the electrons of the atom or the molecule remain located in the vicinity of the...
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Báo cáo khoa học: "Quantitative modeling of the neural representation of adjective-noun phrases to account for fMRI activation" doc
... model The adjective model assumes that the meaning of the composition is the same as the adjective: p=u The noun model assumes that the meaning of the composition is the same as the noun: p=v The ... with the assumption that people use adjectives to modify the meaning of the noun, rather than conjoining the meaning of the adjective and noun In this study, we represented the meaning of both ... changed the meaning of the noun In the case of vehicle nouns, adjectives were chosen to modify the manipulability of the nouns (e.g., to make an airplane more manipulable, paper was chosen as the...
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finite element analysis of pulsed
... Schematic of the laser bending process where k is the thermal conductivity, is the density of the stainless steel, ˜ is the derivative of the enthalpy with respect to temc ˙ perature, and Q ab is the ... computed by the method of element removal and reactivation and the use of a new initial temperature at T s to calculate the stress/strain of the solidified elements During the calculation, element ... cooling The thermal strain reaches the peak value of 0.0232 at 69.52 ns At this time, the corresponding average temperature of the element is 1673 K, which equals the solidus temperature The element...
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finite element analysis of structural steelwork beam to column bolted connections 2001
... movement in the Y direction due to the lack of bending resistance in the bolt BRS2 elements Therefore supports had to be added to the underside of the end plate This removed the shear force from the ... connection into the lower rows In spite of this the new Green Book theory with the increased connection capacities still had a reserve of approximately 30% Overall the finite element analysis of extended ... Scale Test Results Finite Element Model MYSTRO and LUSAS FEA software was used for the finite element analysis The FEA models were created using command files rather than the CAD interface tools...
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Báo cáo hóa học: " Research Article Photorealistic Modeling of the Growth of Filamentous Specimens" pot
... select the CPs equidistantly along the MS of the specimen in the image acquired at the beginning of the missing interval The changes in their positions are estimated by elongating the branches of ... along the corresponding branches of the MS in the image acquired at the end of the interval so that the distance between the CPs on each branch remains uniform This simulates the growth of the ... then reconstructed by warping just the latter image so that from the beginning of the interval until the estimated moment, the new branch remains as long as the width of the filament Most of the...
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Báo cáo hóa học: " Physical Modeling of the Piano" pot
... to the ends of the string, are reflected at the ends, and then return These pulses return while the hammer is still in contact with the string, and since they are inverted by the reflection, they ... aspects of the instrument A second element of strategy involves the determination of the many parameters that are required for describing the piano Ideally, one would like to determine all of these ... proportional to the component of the string tension perpendicular to the plane of the board, and is calculated from the string portion of the model Finally, we include a loss term proportional to the parameter...
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Báo cáo hóa học: " Stochastic Modeling of the Spatiotemporal Wavelet Coefficients and Applications to Quality Enhancement and Error Concealment" docx
... set to zero The higher improvement of the PSNR at the finest temporal resolution level is due to the fact that in this case, the loss of the packet influences only the reconstruction of the temporal ... receives, therefore, the coarser spatiotemporal resolution levels first and then, with the help of the spatiotemporal neighbors, can predict the finest resolution ones The conditional law of the coefficients ... part of the log histogram From the same figure, note also the consistency of the model over the temporal scales This model amounts to cn,m = ln,m + α 1/2 zn,m /2 e (3) Stochastic Modeling of the...
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Báo cáo nghiên cứu khoa học: "FINITE ELEMENT ANALYSIS OF ELASTO-PLASTIC BOUNDARY FOR SOME STRUCTURE PROBLEMS" pot
... which bl is the layer breadth, tl is the layer thickness, zl is the z-coordinate at the middle of the layer, El is Young’s modulus of the layer material, Gl is the shear modulus of the layer material ... 10x10=100 Fig Finite element idealisation of axisymmetric Fig Finite element idealisation of axisymmetric problem, mesh AM1 problem, mesh AM2 y p x 100mm 200mm Fig Finite element idealisation of plane ... results of meshes of the axisymmetric problem model are different with the results obtained by the plane strain problem model The variation stress was rather smooth without concentration of stress The...
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Báo cáo y học: "Predictive network modeling of the highresolution dynamic plant transcriptome in response to nitrate" pps
... is shown in the table below the blue diagonal Entries in the blue diagonal give the gene list size in number of genes Above the diagonal the size of the intersection of each pair of studied gene ... function) over the data set where the signal of a probe i is Pi ~ μ + aN + bT + gT*N + ε, where N is the effect of the nitrate treatment, T is the effect of time, and T*N is the effect of their interaction, ... However, the 3-minute gene list overlaps very little with the rest of the nitrate-regulated genes in the time-course study As such, the second nitrate-regulated module is made up of the union of the...
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Báo cáo y học: "Economic modeling of the combined effects of HIV-disease, cholesterol and lipoatrophy based on ACTG 5142 trial data" pps
... lipoatrophy The effects of CNS toxicities were not included in the model because of their often transient nature, and the effects of diarrhea were not included in the model because of short duration ... variation in measurements We have tested the effects of the variations in the data and of the assumptions made in the model for progression after the end of the clinical trial by performing sensitivity ... lipoatrophy over time for the two Page of 10 regimens Assumptions related to the effects of the rate of lipoatrophy were tested in the sensitivity analysis The economic effect of lipoatrophy was assumed...
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Báo cáo y học: " Reflex control of the spine and posture: a review of the literature from a chiropractic perspective" potx
... to the square of the number of curves (N) plus The resistance (R) of + 1) The resistance (R) of any curved column to compression forces is directly proportional to the square of the number of ... illustrates the development of the sagittal spinal curves This figure illustrates the development of the sagittal spinal curves In the womb, the fetal spine is more of a C-shape (left) As the child ... cortex [29] The primary visual cortex is located on the medial surface of the occipital lobe in the walls of the calcarine sulcus [29] The visual field and pathway are important regulators of postural...
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Báo cáo y học: "Mathematical modeling of the socalled Allis test: a field study in orthopedic confusion" docx
... calculate the angles of the triangle Knowing these angles, we further calculated changes in the location of the right knee that would result from hypothetical reductions in the length of either the ... knee position affected both the altitude of the knee from the table top, and its Y axis position along the length of the table We also calculated the hypothetical effect of one hip being drawn up ... to bring the infant's feet to his or her buttocks In neither of these papers we see any mention of assessing the Y axis location of the knee, as chiropractors performing their version of Allis...
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Báo cáo y học: " Research In silico modeling of the specific inhibitory potential of thiophene-2,3-dihydro-1,5-benzothiazepine against BChE in the formation of β-amyloid plaques associated with Alzheimer''''s disease" doc
... differences, a major diversity in the ligand-AChE complexes was the variation in the positioning of the side chain of Phe330 The divergence in the orientation of the aromatic ring of Phe330 must clearly ... potential of Compound A differs among ChEs In the Compound A-AChE complex, the extension of the cleft is vital for the entrance of Compound A The distance between the center of mass of Trp279 ... that the O ε atom of Glu197 makes a hydrogen bond with the ligand; the N ε atom of His438 is also caught up in hydrogen bonding to the same atom of the ligand, resulting in the cleavage of the...
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Báo cáo y học: "Characterization and modeling of the Haemophilus influenzae core and supragenomes based on the complete genomic sequences of Rd and 12 clinical nontypeable strain" potx
... that the NTHi form biofilms on the respiratory mucosa of humans and other mammals and it has been hypothesized that this contributes to the chronicity of these infections [1,2] They are the most ... estimated by the A histogram of gene the expected number of genes of 13 H influenzae A histogram of gene clusters observed in exactly N of 13 H influenzae strains compared to the expected number of genes ... strains is found at the intersection of the row and column corresponding to the respective strains Strains are compared based on the number of genes shared between the pair, the number of genes found...
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