Thematische Bibliographien / SIMPLEWARE

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Auswahl der wissenschaftlichen Literatur zum Thema „SIMPLEWARE“

Autor: Grafiati

Veröffentlicht am 11. September 2023

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Zeitschriftenartikel zum Thema "SIMPLEWARE"

Johnson, M. R., P. L. Manning, L. Margetss, P. J. Withers und P. M. Mummery. „Virtual repair of fossil CT scan data“. Geological Curator 9, Nr. 3 (September 2010): 193–98. http://dx.doi.org/10.55468/gc228.

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X-ray micro-tomography (XMT) and 3D image-based modelling software has unlocked the ability to digitally repair distorted or broken fossil specimens, thus permitting interpretation of previously unusable finds in finite element analyses (FEA). A fossilized terminal ungual phalanx from the manus of the dromaeosaur Velociraptor mongoliensis (Manchester Museum, University of Manchester, specimen LL.12392) was scanned at the Henry Moseley X-ray Imaging Facility. Inspection of radiographs revealed the Velociraptor manual ungual was broken in several places, previously going unnoticed due to cement repair of the fossil. After conducting a high resolution scan of the ungual the increased sensitivity of the apparatus enabled separation of areas of differing density, in this case the fossilized bone and cement. Image-based modelling software produced by Simpleware (Simpleware Ltd, Rennes Drive, Exeter, EX4 4RN, UK.) allowed slice-by-slice repair in three planes, resulting in a complete, fully stitched 3D digital model of the ungual, whilst maintaining internal cavities and the micron resolution reconstruction of trabecular bone architecture. This software also has the capability to digitally re-inflate specimens that have been compressed during fossilization, restoring skeletons to their original shape and dimension. 3D dissections on geometrically precise reconstructions allow the interpretation of previously unusable specimens and reinterpretation of already described fossils. Further, use of Simpleware software to convert repaired fossils into microstructurally-faithful finite element meshes enable the biomechanical testing of these repaired structures. Testing of fossil structure and function is already underway at the University of Manchester and is adding to our knowledge of the mechanical behaviour of extinct animal biomaterials.

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Pettersen, Fred-Johan, und Jan Olav Høgetveit. „From 3D tissue data to impedance using Simpleware ScanFE+IP and COMSOL Multiphysics – a tutorial“. Journal of Electrical Bioimpedance 2, Nr. 1 (23.07.2019): 13–32. http://dx.doi.org/10.5617/jeb.173.

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Abstract Tools such as Simpleware ScanIP+FE and COMSOL Multiphysics allow us to gain a better understanding of bioimpedance measurements without actually doing the measurements. This tutorial will cover the steps needed to go from a 3D voxel data set to a model that can be used to simulate a transfer impedance measurement. Geometrical input data used in this tutorial are from MRI scan of a human thigh, which are converted to a mesh using Simpleware ScanIP+FE. The mesh is merged with electrical properties for the relevant tissues, and a simulation is done in COMSOL Multiphysics. Available numerical output data are transfer impedance, contribution from different tissues to final transfer impedance, and voltages at electrodes. Available volume output data are normal and reciprocal current densities, potential, sensitivity, and volume impedance sensitivity. The output data are presented as both numbers and graphs. The tutorial will be useful even if data from other sources such as VOXEL-MAN or CT scans are used.

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Kalluri, Lohitha, Bernard Seale, Megha Satpathy, Josephine F. Esquivel-Upshaw und Yuanyuan Duan. „Three-Dimensional Finite Element Analysis of the Veneer—Framework Thickness in an All-Ceramic Implant Supported Fixed Partial Denture“. Ceramics 4, Nr. 2 (28.04.2021): 199–207. http://dx.doi.org/10.3390/ceramics4020015.

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This study was performed as an adjunct to an existing clinical study to validate the effect of veneer: framework thickness ratio on stress distribution in an implant-supported all-ceramic fixed partial denture. Two commercially available titanium dental implants with corresponding customized abutments and a patient-retrieved all-ceramic fixed partial denture were scanned using a high-resolution micro-CT scanner. Reconstructed 3D objects, along with a simulated bone surface, were incorporated into a non-manifold assembly and meshed simultaneously using Simpleware software (Synopsys Simpleware ScanIP Version P-2019.09; Mountain View, CA). Three such volume meshes (Model A, Model B, Model C) corresponding to veneer: framework thickness ratios of 3:1, 1:1, and 1:3 respectively were created, and exported to a finite element analysis software (ABAQUS). An axial load of 110 N was applied uniformly on the occlusal surfaces to calculate the static stresses and contour plots were generated in the post-processing module. From the data obtained, we observed optimum stress distribution in Model B. Also, the tensile stresses were concentrated in the posterior connector region of the prosthesis in all three models tested. Within the limitations of this study, we can conclude that equal thickness of veneer and framework layers would aid in better stress distribution.

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Cotton, R. T., C. W. Pearce, P. G. Young, N. Kota, A. C. Leung, A. Bagchi und S. M. Qidwai. „Development of a geometrically accurate and adaptable finite element head model for impact simulation: the Naval Research Laboratory–Simpleware Head Model“. Computer Methods in Biomechanics and Biomedical Engineering 19, Nr. 1 (07.01.2015): 101–13. http://dx.doi.org/10.1080/10255842.2014.994118.

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Romeed, Shihab A., Raheel Malik und Stephen M. Dunne. „Stress Analysis of Occlusal Forces in Canine Teeth and Their Role in the Development of Non-Carious Cervical Lesions: Abfraction“. International Journal of Dentistry 2012 (2012): 1–7. http://dx.doi.org/10.1155/2012/234845.

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Non-carious cervical tooth lesions for many decades were attributed to the effects of abrasion and erosion mainly through toothbrush trauma, abrasive toothpaste, and erosive acids. However, though the above may be involved, more recently a biomechanical theory for the formation of these lesions has arisen, and the term abfraction was coined. The aim of this study was to investigate the biomechanics of abfraction lesions in upper canine teeth under axial and lateral loading conditions using a three-dimensional finite element analysis. An extracted human upper canine tooth was scanned byμCT machine (Skyscan, Belgium). TheseμCT scans were segmented, reconstructed, and meshed using ScanIP (Simpleware, Exeter, UK) to create a three-dimensional finite element model. A 100 N load was applied axially at the incisal edge and laterally at 45° midpalatally to the long axis of the canine tooth. Separately, 200 N axial and non-axial loads were applied simultaneously to the tooth. It was found that stresses were concentrated at the CEJ in all scenarios. Lateral loading produced maximum stresses greater than axial loading, and pulp tissues, however, experienced minimum levels of stresses. This study has contributed towards the understanding of the aetiology of non-carious cervical lesions which is a key in their clinical management.

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Mansell, Doyin S., Evelyn G. Frank, Nathaniel S. Kelly, Bruno Agostinho-Hernandez, James Fletcher, Vito D. Bruno, Eva Sammut et al. „Comparison of the within-reader and inter-vendor agreement of left ventricular circumferential strains and volume indices derived from cardiovascular magnetic resonance imaging“. PLOS ONE 15, Nr. 12 (15.12.2020): e0242908. http://dx.doi.org/10.1371/journal.pone.0242908.

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Purpose Volume indices and left ventricular ejection fraction (LVEF) are routinely used to assess cardiac function. Ventricular strain values may provide additional diagnostic information, but their reproducibility is unclear. This study therefore compares the repeatability and reproducibility of volumes, volume fraction, and regional ventricular strains, derived from cardiovascular magnetic resonance (CMR) imaging, across three software packages and between readers. Methods Seven readers analysed 16 short-axis CMR stacks of a porcine heart. Endocardial contours were manually drawn using OsiriX and Simpleware ScanIP and repeated in both softwares. The images were also contoured automatically in Circle CVI42. Endocardial global, apical, mid-ventricular, and basal circumferential strains, as well as end-diastolic and end-systolic volume and LVEF were compared. Results Bland-Altman analysis found systematic biases in contour length between software packages. Compared to OsiriX, contour lengths were shorter in both ScanIP (-1.9 cm) and CVI42 (-0.6 cm), causing statistically significant differences in end-diastolic and end-systolic volumes, and apical circumferential strain (all p<0.006). No differences were found for mid-ventricular, basal or global strains, or left ventricular ejection fraction (all p<0.007). All CVI42 results lay within the ranges of the OsiriX results. Intra-software differences were found to be lower than inter-software differences. Conclusion OsiriX and CVI42 gave consistent results for all strain and volume metrics, with no statistical differences found between OsiriX and ScanIP for mid-ventricular, global or basal strains, or left ventricular ejection fraction. However, volumes were influenced by the choice of contouring software, suggesting care should be taken when comparing volumes across different software.

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Swain, L., D. Shillabeer, H. Wyatt, I. Jonkers, C. Holt und D. Williams. „IN VIVO PILOT STUDY OF TIBIOFEMORAL KINEMATICS DURING LOADED DYNAMIC ACTIVITIES“. Orthopaedic Proceedings 105-B, SUPP_8 (11.04.2023): 12. http://dx.doi.org/10.1302/1358-992x.2023.8.012.

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Biplane video X-ray (BVX) – with models segmented from magnetic resonance imaging (MRI) – is used to directly track bones during dynamic activities. Investigating tibiofemoral kinematics helps to understand effects of disease, injury, and possible interventions.Develop a protocol and compare in-vivo kinematics during loaded dynamic activities using BVX and MRI.BVX (60 FPS) was captured whilst three healthy volunteers performed three repeats of lunge, stair ascent and gait. MRI scans were performed (Magnetom 3T Prisma, Siemens). 3D bone models of the tibia and femur were segmented (Simpleware Scan IP, Synopsis). Bone poses were obtained by manually matching bone models to X-rays (DSX Suite, C-Motion Inc.). Mean range of motion (ROM) of the contact points on the medial and lateral tibial plateau were calculated using custom MATLAB code (MathWorks). Results were filtered using an adaptive low pass Butterworth filter (Frequency range: 5-29Hz).Gait and Stair ascent activities from one participant's data showed increased ROM for medial-lateral (ML) translation in the medial compartment but decreased ROM in anterior-posterior (AP) translation when comparing against the same translations on the lateral compartment of the tibial plateau. Lunge activity showed increased ROM for both ML and AP translation in the medial compartment when compared with the lateral compartment.These results highlight the variability in condylar translations between different activities. Understanding healthy in-vivo kinematics across different activities allows the determination of suitable activities to best investigate the kinematic changes due to disease or injury and assess the efficacy of different interventions.Acknowledgements: This research was supported by the Engineering and Physical Sciences Research Council (EPSRC) doctoral training grant (EP/T517951/1).

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Williams, D., G. Chapman, L. Esquivel und C. Brockett. „DEVELOPMENT OF AN IN VIVO ANKLE AND HINDFOOT KINEMATIC PROTOCOL TO INVESTIGATE ACTIVITIES OF DAILY LIVING“. Orthopaedic Proceedings 105-B, SUPP_8 (11.04.2023): 98. http://dx.doi.org/10.1302/1358-992x.2023.8.098.

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To be able to assess the biomechanical and functional effects of ankle injury and disease it is necessary to characterise healthy ankle kinematics. Due to the anatomical complexity of the ankle, it is difficult to accurately measure the Tibiotalar and Subtalar joint angles using traditional marker-based motion capture techniques. Biplane Video X-ray (BVX) is an imaging technique that allows direct measurement of individual bones using high-speed, dynamic X-rays.The objective is to develop an in-vivo protocol for the hindfoot looking at the tibiotalar and subtalar joint during different activities of living.A bespoke raised walkway was manufactured to position the foot and ankle inside the field of view of the BVX system. Three healthy volunteers performed three gait and step-down trials while capturing Biplane Video X-Ray (125Hz, 1.25ms, 80kVp and 160 mA) and underwent MR imaging (Magnetom 3T Prisma, Siemens) which were manually segmented into 3D bone models (Simpleware Scan IP, Synopsis). Bone position and orientation for the Talus, Calcaneus and Tibia were calculated by manual matching of 3D Bone models to X-Rays (DSX Suite, C-Motion, Inc.). Kinematics were calculated using MATLAB (MathWorks, Inc. USA).Pilot results showed that for the subtalar joint there was greater range of motion (ROM) for Inversion and Dorsiflexion angles during stance phase of gait and reduced ROM for Internal Rotation compared with step down. For the tibiotalar joint, Gait had greater inversion and internal rotation ROM and reduced dorsiflexion ROM when compared with step down.The developed protocol successfully calculated the in-vivo kinematics of the tibiotalar and subtalar joints for different dynamic activities of daily living. These pilot results show the different kinematic profiles between two different activities of daily living. Future work will investigate translation kinematics of the two joints to fully characterise healthy kinematics.

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Rodrigues, Nadja Da Nóbrega, und Naylla Vieira de Almeida Estrela. „SimpleWay process: parceria entre academia e indústria através de engenharia de software aplicada a projetos reais“. Revista Principia - Divulgação Científica e Tecnológica do IFPB 1, Nr. 23 (21.06.2013): 95. http://dx.doi.org/10.18265/2447-9187a2013id7784.

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<span>Entendendo a necessidade de integração entre academia e indústria, este artigo relata a estratégia de uso de recursos técnicos de uma Empresa Júnior (EJ) da Área de Ciência da Computação enquanto instrumentos para ensino e aprendizagem de Engenharia de Software aplicada. A metodologia associada ao estudo baseou-se no uso de um Processo de Desenvolvimento de Software (PDS) específico, desenvolvido para a EJ, e do ambiente criado para este PDS, como instrumentos na instanciação de projetos reais da EJ ou fictícios, em sala de aula. As principais contribuições do uso do PDS e do seu ambiente foram o aumento na qualidade dos projetos e o valor agregado aos alunos, através da utilização de boas práticas da indústria.</span>

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Šoja, Tijana. „OPTIMAL LEVEL OF FOREIGN RESERVES – EXAMPLE OF BOSNIA AND HERZEGOVINA“. ЗБОРНИК РАДОВА ЕКОНОМСКОГ ФАКУЛТЕТА У ИСТОЧНОМ САРАЈЕВУ 1, Nr. 9 (31.12.2014): 107. http://dx.doi.org/10.7251/zrefis1409107s.

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The paper points to the conceptualdefinition of foreign exchange reserves, the role,importance and objectives for holding foreignexchange reserves as well as evaluating the requiredamount of foreign exchange reserves, or adequacy offoreign exchange reserves. Foreign exchangereserves are important assets in each country andthey are significantly affected by monetary policy,exchange rate policy or regulation and externalinstability and the impact of the crisis that may comefrom the environment. This paper presents a simpleway of estimates of adequacy and optimality offoreign exchange reserves, which are basis for theanalysis of foreign exchange reserves, as well as inthe construction of statistical and mathematicalmodels that detail the optimal level of internationalreserves. Special review was paid to the assessmentof the adequacy of foreign exchange reserves ofBosnia and Herzegovina, and the Central Bank ofBosnia and Herzegovina.

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Mehr Quellen

Konferenzberichte zum Thema "SIMPLEWARE"

Dooley, James, Vic Callaghan, Hani Hagras und Phil Bull. „Simpleware Device Surrogates: Enabling High-Level Description and Interaction with Resource Constrained Devices“. In 2010 6th International Conference on Intelligent Environments (IE). IEEE, 2010. http://dx.doi.org/10.1109/ie.2010.44.

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Genc, Kerim, Paul Segars, Steve Cockram, Dane Thompson, Marc Horner, Ross Cotton und Philippe Young. „Workflow for Creating a Simulation Ready Virtual Population for Finite Element Modeling“. In ASME 2013 Conference on Frontiers in Medical Devices: Applications of Computer Modeling and Simulation. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fmd2013-16027.

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A proof of concept workflow is demonstrated to easily translate 3D medical image data into finite element (FE) simulation ready phantom models. First, novel methods are used to drastically reduce manual segmentation time for a virtual population. Next, using Simpleware software, the segmented voxel datasets are extracted into faceted 3D CAD objects for tissues, while simultaneously maintaining conformal multi-tissue interfaces. Finally, the 3D CAD geometries are demonstrated to be readily compatible in a commercial 3D electromagnetic simulator, ANSYS HFSS.

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