Mesh Deformation

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The whole mesh deformation model: a fast image segmentation method suitable for effective parallelization

The whole mesh deformation model: a fast image segmentation method suitable for effective parallelization

The WMD model has been designed since the beginning with the aim for execution on parallel architectures. We have implemented a parallel image segmentation algo- rithm using our model as the foundation. It is able to take advantage of several processing units by dividing the segmentation task into equal parts, which would be carried out by the said units simultaneously. In such a scenario, the workload distribution is performed in the following way: all the nodes of the mesh are divided in as many groups as there are processing units available. Each of the units will have full access to the input data in order to allow full mesh deformation and avoid a situ- ation when the given node is not able to move outside a specific region, because its processing unit does not hold any information about the necessary image data. Naturally this approach imposes the drawback of time required to propagate the input data between all the processing units, but our tests with a computer cluster have shown that this time is not very significant in terms of the whole segmen- tation time. In a scenario with multi-core machine being the execution environment, this time would be even less considerable.
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Delaunay graph mapping based mesh deformation for simulation of a spanwise rigid and flexible flapping NACA0012 wing using DES with parallel implementation

Delaunay graph mapping based mesh deformation for simulation of a spanwise rigid and flexible flapping NACA0012 wing using DES with parallel implementation

The results obtained for the instantaneous coefficient of thrust are quite encouraging in comparison with the experimental data. It imbibes the confidence in using moving meshes with Detached-Eddy simulation with encouraging results. Due to its simplicity and non-iterative nature, the Delaunay-Graph mesh deformation methodology can be extended to LES simulations with massive mesh sizes, especially for huge size grids that cannot afford iterative mesh deformation scheme.

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From D-RGB-based reconstruction toward a mesh deformation model for monocular reconstruction of isometric surfaces

From D-RGB-based reconstruction toward a mesh deformation model for monocular reconstruction of isometric surfaces

In this paper, we dealt with reconstruction of isomet- ric surfaces. To perform such monocular reconstruction, an algorithm based on the linear deformation model and consisting of a non-linear least-squares optimization was proposed. To find the proper deformation model, prior training data should be used. We therefore provided this prior data by proposing a novel approach for the recon- struction of a typical surface so that the computed defor- mation model can be also extended to other isometric surfaces. This approach was founded on a range camera along with a conventional camera and its goal is to esti- mate the 3D positions of the mesh vertices from the depth of the feature points. By applying this approach to mul- tiple mesh deformations, we acquired the training data required. Experimental results showed that both the pro- posed reconstruction schemes are efficient and result in accurate reconstructions.
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CFD study of fluid flow changes with erosion

CFD study of fluid flow changes with erosion

For the first time, a three dimensional mesh deformation algorithm is used to assess fluid flow changes with erosion. The validation case chosen is the Jet Im- pingement Test, which was thoroughly analysed in previous works by Hattori et al [1], Gnanavelu et al. in [2, 3], Lopez et al in [4] and Mackenzie et al in [5]. Nguyen et al showed the formation of a new stagnation area when the wear scar is deep enough by performing a three-dimensional scan of the wear scar after 30 minutes of jet impingement test in [6] . However, in the work developed here, this stagnation area was obtained solely by computational means. The procedure consisted of applying an erosion model in order to obtain a deformed geometry, which, due to the changes in the flow pattern lead to the formation of a new stagnation area. The results as well as the wear scar were compared to the results by Nguyen et al [6] showing the same trend. OpenFOAM R was the software chosen for the implementation of the deforming mesh algorithm as well as remeshing of the computational domain after deformation. Differ- ent techniques for mesh deformation and approaches to erosion modeling are discussed and a new methodology for erosion calculation including mesh defor- mation is developed. This new approach is independent of the erosion modeling approach, being applicable to both Eulerian and Lagrangian based equations for erosion calculation. Its different applications such as performance decay in machinery subjected to erosion as well as modeling of natural erosion processes
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Ferrocement Panels Under Impact Loading By Incorporating Basalt Fibers

Ferrocement Panels Under Impact Loading By Incorporating Basalt Fibers

increase and as the height increase the no. of blows required to first crack was decreases. K. Mounika, A. Suchith Reddy, G. Latha (2015) [3] , In their paper, the flexure and low impact velocity test are performed with layer of welded mesh and by varying the percentage of steel fibres. Panels used for low impact velocity test is 500×500×25mm and percentage of fibres used are 1%, 1.5%, 2%. The result shows that by increasing the percentage of steel fiber and by increasing the layer of mesh impact energy increases. By increasing the steel fiber central deflection of panel decreases and flexure strength increases. T. Subramani, R.Siva (2016) [2] , the ferrocement panels with dimension 600×600×15mm were used and flexure and low velocity test were carried out on it. The PVC coated mesh is used and waste plastic fiber are used with 5% and 10%. The result shows that by addition of waste plastic fiber the number of blows increases for the first crack and ultimate failure. Also, by increasing the PVC coated wire mesh layers. P.B. Sakthivel 1 , A. Ravichandran 2 , and N. Alagumurthi 3 , slab size 250×250×25mm were cast with steel mesh and polyolefin fibers with 0.25-2.5% of volume of specimen.the number of layers used are 3-5, the 3kg drop weight is used and drop from 0.6m. When the number of layer increases the energy absorption is also increases but when fibers wewre add energy absorption is two times of normal panel. Yash N. Patel, Darshan G. Gaidhankar, Mrudula S. Kulkarni (2019) [15] , the panels of size 250×250mm are used with thickness 20mm, 30mm, 40mm. Corrugated fiber are used in ferrocement panel which is 1.5% of total volume of panel. The number of mesh layer used are 2 and 3. The drop height is 1m and grade of mortar used is M30 and M40. The result shows that by increasing the thickness and number of layers of mesh, deformation of panels, equivalent stress and normal stress reduces. By using welded mesh and corrugated fiber it gives good impact resistance. Zakaria Che Muda, et. Al (2016) [13] , In their paper, the panels of size 300×3000mm are used which is subjected to low impact test. The drop weight of 1.236kg is used at drop height 150mm, 350mm, 500mm. The thickness and mesh spacing used is 20mm, 40mm and 50mm. The result shows that, the mesh with smaller opening provide more contribution to the impact resistance that that of slab thickness. ______________________
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Lagrangian method enhanced with edge swapping for the free fall
and contact problem

Lagrangian method enhanced with edge swapping for the free fall and contact problem

We shall show that the situation is not desperate. Our idea is twofold. First, to use the newly developed cell centered Lagrangian scheme [4, 5] (which has been used to compute Figure 1; actually any other Lagrangian cell centered scheme, such as in [10], could be used instead) and to combine this scheme with 2D algorithms which are known to be efficient for the treatment of large mesh deformations. These algorithms consist in a swap procedure based on the empty ball criterion (or Delaunay criterion). Second (this is the originality of the present work), to design a procedure for the contact.
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A Data-augmented 3D Morphable Model of the Ear

A Data-augmented 3D Morphable Model of the Ear

To our knowledge, Zolfaghari et al. [13] published the only work on a 3D morphable model of ear, but the morphable model is not publicly available. Zhou et al. built a 2D morphable model of the ear and made a 2D ear image dataset publicly available with 55 manually-labelled ground- truth landmarks [16]. Our work is based on this dataset and requires a non-rigid shape template deformation method. Several extensions of Iterative Closest Points (ICP) for the nonrigid case were proposed [17], [18], [19], [20]. The extensions of ICP have good performance in shape difference elimination but have problems in over-fitting and point sliding. Amberg et al. [17] defined the optimal-step Nonrigid
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Searching for rare diseases in PubMed: a blind comparison of Orphanet expert query and query based on terminological knowledge

Searching for rare diseases in PubMed: a blind comparison of Orphanet expert query and query based on terminological knowledge

Several institutions (Genetic and Rare Diseases In- formation Center [12] and Orphanet [13]) already gather information on their website about rare dis- eases including a brief summary, clinical information and many links to other resources. Sometimes a link to a PubMed expert based query is provided, limiting users task to citation relevance assessment. Neverthe- less, in the case of Orphanet these queries do not always take advantage of all the MeSH/PubMed func- tionalities and they are far from providing a compre- hensive coverage of all rare diseases. Moreover, the methodology of establishing these queries is not dis- closed on the Orphanet website. The aim of this study was to propose a set of queries linked to each rare disease term in Orphanet and to evaluate these queries against those developed by Orphanet.
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The role for osmotic agents in children with acute encephalopathies: a systematic review

The role for osmotic agents in children with acute encephalopathies: a systematic review

clinical trials and evidence-based healthcare at Brown medical school. The search databases for unpublished studies and grey literature were dissertation abstracts international, the World Health Organization library, Agency for Healthcare Research and Quality, Grey lit- erature report, National Library of Medicine, theses Canada portal, Proquest digital theses, Australasian digi- tal theses program and the British library. The initial search analyzed the text words contained in the title and abstract, and the index terms used to describe the articles. A second search that used all identified key- words and index terms, individually and in combina- tions, was applied. The reference list of all identified reports and articles were then searched for additional studies. In our search in Pubmed, we applied the search phrase “(mannitol [MeSH] OR hypertonic saline [MeSH] OR urea [MeSH] OR sorbitol [MeSH] OR gly- cerol [MeSH]) AND (hepatic encephalopathy [MeSH] OR malaria, cerebral [MeSH] OR meningitis [MeSH] OR encephalitis [MeSH] OR brain injuries [MeSH] OR head injuries [MeSH] OR coma [MeSH] OR intracranial hypertension [MeSH]) ” and limited it to children, the English and French languages, and the duration between 1 st of January 1966 and 31 st March 2009, and children. ”
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Communication strategies in the prevention of type 2 and gestational diabetes in vulnerable groups: protocol for a scoping review

Communication strategies in the prevention of type 2 and gestational diabetes in vulnerable groups: protocol for a scoping review

AND ( “ Ethnic Groups ” [Mesh] OR “ Minority Groups ” [Mesh] OR “ Poverty Areas ” [Mesh] OR “ Vulnerable Populations ” [Mesh] OR “ Health Status Disparities ” [Mesh] OR “ Cultural Diversity ” [Mesh] OR “ Socioeconomic Factors ” [Mesh] OR “ Aged ” [Mesh] OR “ Substance-Related Disorders ” [Mesh] OR “ Malnutrition ” [Mesh] OR “ Disabled Persons ” [Mesh] OR “ Educational Status ” [Mesh] OR “ Emigrants and Immigrants ” [Mesh] OR “ Homeless Persons ” [Mesh] OR “ Minors ” [Mesh] OR “ Transients and Migrants ” [Mesh] OR “ Refugees ” [Mesh] OR “ Unemployment ” [Mesh] OR “ Mental Disorders ” [Mesh] OR ethnic group*[tiab] OR ethnic population*[tiab] OR minority[tiab] OR minorities[tiab] OR ethnic minorit*[tiab] OR poverty[tiab] OR destitution[tiab] OR poor housing[tiab] OR addiction[tiab] OR drug abuse[tiab] OR malnutrition[tiab] OR malnourished[tiab] OR vulnerable population*[tiab] OR vulnerable group*[tiab] OR socioeconomic factor*[tiab] OR socioeconomic aspect*[tiab] OR deprived[tiab] OR health status[tiab] OR aged[tiab] OR elderly[tiab] OR elders[tiab] OR minors[tiab] OR disabled[tiab] OR disability[tiab] OR level of education[tiab] OR education level[tiab] OR mental disorder[tiab] OR need for care[tiab] OR need of care[tiab] OR care dependency[tiab] OR
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Drug-based pain management in people with dementia after hip or pelvic fractures: a systematic review protocol

Drug-based pain management in people with dementia after hip or pelvic fractures: a systematic review protocol

(((((((((dementia[Mesh]) OR Frontotemporal Dementia[Mesh]) OR AIDS Dementia Complex[Mesh]) OR Alzheimer ’ s[Mesh]) OR Delirium, Dementia, Amnestic, Cognitive Disorders[Mesh]) OR Lewy Body Disease[Mesh]) OR vascular dementia) OR cognitive impairment, mild[MeSH Terms]) OR alzheimer*) OR alzheimer disease) OR (dementia OR dement*)) OR dementia, multi-infarct[Mesh]) OR (Cognit* AND (disord* OR impair* OR declin* OR function*))))))) OR ((frail elderly[MeSH Terms] OR aged[MeSH Terms] OR aged, 80 and over[MeSH Terms] OR elderly OR elders OR older adults))))) AND (((((((pain management[MeSH Terms]) OR Pain OR (((pain treat* OR pain treatment OR pain therapy OR pain therap* OR narcotics[MeSH Terms] OR analgesics[MeSH Terms] OR analgesics, opioid[MeSH Terms] OR analgesic OR analgesia OR analge*))))) OR (((Pain) AND (medication OR medicat* OR drugs OR drug OR prescribing OR prescrib*))))))) AND ((((((((((pelvic fracture OR pelvic fract* OR pelvic-fract* OR (fract* pelvis) OR pelv* fract* OR pelv* trauma OR pelvic traumato*))) OR ((pelvic bones[MeSH Terms]) AND ((fracture OR fract* OR trauma OR traumato*)))) OR ((((acetabulum OR ilium OR ischium OR pubic bone) AND (fracture OR fract* OR trauma OR traumato*))))))) OR (((femoral neck fracture OR femoral neck fract* OR femur neck fracture OR femur neck fract* OR femoral neck trauma OR femur neck trauma OR trochanteric fracture OR trochant* fract* OR trochanteric trauma OR intertrochanteric fracture OR intertrochant* fract* OR subtrochanteric fracture OR subtrochant* fract*)) OR (proximal femur fracture OR proximal femur fract* OR proximal femur trauma OR proximal femoral fracture OR proximal femoral fract* OR proximal femoral trauma)) OR ((femoral neck fractures[MeSH Terms] OR hip fractures[MeSH Terms])))))))))
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Reconstructing B-patch surface from triangular mesh

Reconstructing B-patch surface from triangular mesh

Subdivision surfaces have recently become very popular in the computer graphics and geometric modeling. Even though these surfaces allow representing multiresolution surfaces with free-form topology, they are difficult to evaluate accurately and control locally. Consequently, the subdivision surfaces are not commonly supported by the current modeling systems. However, the subdivision surface is considering as a bridge between a control mesh of parametric surface and a smooth limit surface through the repeated process of a fixed set of subdivision rules on a control mesh. As is well known, the subdivision is a process to create a finer mesh from an arbitrary coarse mesh by adding new vertices and new faces into[5], whereas the inverse subdivision aims at constructing a coarse mesh from a given dense one. In other words, the subdivision increases the resolution of an object while the inverse subdivision reduces the resolution of that object. As the inverse subdivision process can be stopped after each step, a different multiresolution representation can be obtained.
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A Hybrid PSO-GA Algorithm for Energy Efficient Routing in AMMNET

A Hybrid PSO-GA Algorithm for Energy Efficient Routing in AMMNET

The Advent of wireless technology brought tremendous changes in the field of communications. Of these one of the major contributions of wireless technology is MANET [1]. Mobile ad hoc networks are infrastructure less networks with mobile nodes. Nodes in MANET also act as a router and helps in forwarding the data packets from one node to another. These networks are easily deployable and self-forming and are suitable for the situations were a fixed infrastructure is infeasible. Due to these characteristics MANET founds application in many fields such as military, rescue operations, emergency operations...etc. in case of battlefield and rescue operations clients’ needs to works in group and has to occupy different locations at different time. Since the communication ranges of each node in an MANET are limited, clients when moved to a large distance can’t communicate with each other. This problem is called the partition problem. To overcome this problem there by maintaining inter group communications an autonomous mobile mesh network was introduced.
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A Review of 3D Design Parameterization Using Reverse Engineering

A Review of 3D Design Parameterization Using Reverse Engineering

This car is a fairly large object and thus, to produce a suitable polygonal model, the arm was positioned in a dozen of different arrangements in order to collect all the data desired and scan the component in various directions. A total of about 3000 scans were taken. It took three days to scan half of the car. The time required to scan the car could have been reduced by using other scanner technologies. The reverse engineering software used for pre-processing the data is PolyWorks V9. It is a proprietary software package that deals with cloud points, mesh repair, surface generation and inspection.
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4D CTA in Neurovascular Disease: A Review

4D CTA in Neurovascular Disease: A Review

“Stroke” [Medical Subject Headings or MeSH] OR “Intracranial Arteriovenous Malformations” [MeSH] OR “Central Nervous System Vascular Malformations” [MeSH] OR “Arteriovenous Fistula” [MeS[r]

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Dental caries experience, care index and restorative index in children with learning disabilities and children without learning disabilities; a systematic review and meta-analysis

Dental caries experience, care index and restorative index in children with learning disabilities and children without learning disabilities; a systematic review and meta-analysis

(Child [MeSH] OR child* OR pediatric OR paediatric) AND ( “ pediatric dentistry ” [MeSH] OR dentistry OR dental OR teeth OR tooth OR oral OR “ oral health ” [- MeSH]) AND ( “ special nee[r]

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Mesh optimization: some results in 3D elasticity

Mesh optimization: some results in 3D elasticity

An ongoing application of elastic analysis to the nuclear industry provided us with the occasion to evaluate the impact of the mesh quality on nite element computations. The strong ellipticity of the elastic operator suggests that this problem is not highly sensitive to the presence of a few distorted elements within the mesh. In addition, the test reported in this section was conducted on a problem with smooth analytical solution. Our results can thus be viewed as a lower bound for the inuence of the mesh quality on actual numerical computations. Though the optimization of the mesh is restricted to, say, the worst 1 percent of the elements, it is observed that this signicantly reduces the error in the determination of the maximum stresses, together with the number of conjugate-gradient iterations required to solve the linear system.
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Preparation of Stability Report for Apartment and Techniques to be Adopted Based on the Report

Preparation of Stability Report for Apartment and Techniques to be Adopted Based on the Report

Based on the experiments carried out, it can be concluded that , on the same value of load, the ferrocement laminated beam has lesser value of deflection compared with the control beam. This shows that the ferrocement laminated beam 1,2,3,4&5 has an improvement of about 30% ,50% ,40% ,47% &45% of deflection against the control beam. The ferrocement laminate increases the ultimate load for maximum of about 50%.Effective retrofitting of precracked damaged reinforced concrete beam with ferrocement laminated sheets which are directly glued with epoxy resin in the bottom tension face and sides resulted in improving the ultimate flexural strength. Better strength is achieved by providing the number of layers of mesh is increased, resulting in enhanced load carrying capacity of the beam. The result shows that the strengthening the overloading damaged reinforced concrete beams wrapped with ferrocement laminates in different volume fractions which are directly glued into the tension and side faces of the beam, have better flexural strength and lesser deflection.
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The impact of mHealth interventions on health systems: a systematic review protocol

The impact of mHealth interventions on health systems: a systematic review protocol

#6 Search (((((((((((((mhealth[All Fields]) OR telemedicine[MeSH Terms]) OR cellphone[MeSH Terms]) OR reminder system[MeSH Terms]) OR wireless technology[MeSH Terms])OR text messaging[Me[r]

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Elements of Integrating Traditional and Complementary Medicine into Primary Healthcare: A Systematic Review

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This study was planned according to the “Preferred Reporting Items for Systematic Reviews and Meta Analyses” (PRISMA) guidelines and registered in Iran university of medical science (identification No: 9223476203/2016). The needed data were gathered by searching PubMed (1966-present), Embase (1947-present), Web of Science (1900-present), Scopus (1966-present), and Ovid (1946-present) from January 2000 to February 2017 and the last search was run on 11 February 2017. The search keywords were: (Integrat* OR collabor* OR converg* OR incorpor* OR inclu* OR cooper* OR contribut* OR blend* OR merg* OR assimilat*) AND (Tradition* OR complement* OR alternat* OR home OR primitive OR indigenous OR folk* OR ethno*) AND (Medic* OR therap* OR remed* OR heal* OR treat* OR cure*) AND (primary healthcare OR primary health care OR primary care OR PHC). All the related fields of the Medical Subject Headings (MeSH) and Emtree were searched. MeSH terms of traditional medicine, complementary medicine, integrative medicine, primary healthcare, East Asian traditional medicine, Korean traditional medicine, Tibetan traditional medicine, Mongolian traditional medicine, African traditional medicine, and Chinese traditional medicine were searched in PubMed. Combinations of traditional medicine keywords were also searched in the titles of the papers. The reference lists of eligible studies were scanned and hand searched for related studies. An example of the search strategy is provided in [Appendix 1].
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