8,437 research outputs found
A Tradução da fala do personagem Hagrid para o português brasileiro e português europeu no livro Harry Potter e a Pedra Filosofal: um estudo baseado em corpus
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Estudos da Tradução, Florianópolis, 2010Este trabalho abarca a interseção entre Estudos da Tradução e Literatura Infanto-Juvenil, mais especificamente estuda a tradução do livro Harry Potter and the Philosopher's Stone e suas traduções para o português brasileiro e europeu, ambas intitulada de Harry Potter e a Pedra Filosofal. A hipótese inicial informando este estudo era que as tradutoras optaram pela redução de grande parte das marcas dialetais, utilizando, em suas traduções, transposições da variante falada para a escrita através de marcas de oralidade, indo ao encontro do que Krings (1986) chama de estratégia da redução e Klingberg (1986) considera uma padronização. Para verificar essa hipótese, foram criadas categorias para analisar marcas dialetais e marcas de oralidade no discurso escrito utilizando-se metodologias dos estudos baseados em corpus. Mais especificamente usou-se um corpus paralelo bilíngue o qual é um subcorpus do PEPCo - Portuguese-English Parallel Corpus (FERNANDES; BARTHOLAMEI JR., 2009). Após a análise de dados verificou-se que o padrão preferencial da tradutora portuguesa é dar uma maior ênfase à marcação da oralidade em relação à tradutora brasileira, embora nenhuma delas tenha optado por traduzir o dialeto do texto-fonte por um dialeto do texto-alvo em suas respectivas traduções
The potential impact of CT-MRI matching on tumor volume delineation in advanced head and neck cancer
No full textPURPOSE: To study the potential impact of the combined use of CT and MRI scans on the Gross Tumor Volume (GTV) estimation and interobserver variation. METHODS AND MATERIALS: Four observers outlined the GTV in six patients with advanced head and neck cancer on CT, axial MRI, and coronal or sagittal MRI. The MRI scans were subsequently matched to the CT scan. The interobserver and interscan set variation were assessed in three dimensions. RESULTS: The mean CT derived volume was a factor of 1.3 larger than the mean axial MRI volume. The range in volumes was larger for the CT than for the axial MRI volumes in five of the six cases. The ratio of the scan set common (i.e., the volume common to all GTVs) and the scan set encompassing volume (i.e., the smallest volume encompassing all GTVs) was closer to one in MRI (0.3-0.6) than in CT (0.1-0.5). The rest volumes (i.e., the volume defined by one observer as GTV in one data set but not in the other data set) were never zero for CT vs. MRI nor for MRI vs. CT. In two cases the craniocaudal border was poorly recognized on the axial MRI but could be delineated with a good agreement between the observers in the coronal/sagittal MRI. CONCLUSIONS: MRI-derived GTVs are smaller and have less interobserver variation than CT-derived GTVs. CT and MRI are complementary in delineating the GTV. A coronal or sagittal MRI adds to a better GTV definition in the craniocaudal direction
Application of CT in Diagnosing Carcinoma of the Maxillary Sinuses : PART 2: An Experimental Study of Pitfalls Encountered when Diagnosing Carcinoma of the Maxillary Sinuses with CT
No full text1982-03A phantom simulating the transverse section of the maxillary sinuses was constructed for experimentation with various CT scanners to study the following: (1) the occasional inability to image the very thin posterior-lateral walls which have no real bone defects, and (2) to verify whether or not the bony walls surrounding the maxillary sinuses are actually as thick as they appear on CT. The phantom was made of an acrylic cylinder containing three cavities simulating the maxillary sinuses and the nasal cavity and filled with water. The walls, made of thin aluminum and acrylic plates and placed between water and air, disappeared in some CT images. The thickness of the walls calculated from CT values was greater than the true thickness imaged by each CT scanner. The author stresses that in CT images, either experimentally or clinically, thin bony walls placed between water and air or fat tend to disappear, and that bony walls tend to appear thicker than their true thickenss.departmental bulletin pape
Data for Doctoral thesis'Towards realistic large-scale simulations of fixed bed chemical reactors: Bridging the gap between discrete element and porous media computational fluid dynamics models'
No full textData submitted for doctoral thesis
1) filename: Chapter_3_Fig_Data -> Excel file, with the data for Figure A.10 presented in Appendix C
2) Chapter_4_Fig_Data -> Excel file, data for all figures in Chapter 4 of the thesis.
3) Chapter_5_Fig_Data -> Excel file, data for all figures in Chapter 5 of the thesis.
4) 5S_beds_analysis_Avizo_method -> Excel file, containing all data of the 5S 100-300, 300-500, and 500-700 particles.
5) Bed_Characteristics_Avizo_method_v4 -> Excel file, containing all data of the 1S 100-300, 300-500, and 500-700 particles.
6) Chapter_6_Fig_Data -> Excel file, kinetic data derivation for the Ethanol dehydration reaction used in Chapter 6, shown in Appendix B7.
7) Profiles_Comparison_DEM_SR -> Excel file, containing all data for the radial profiles of all parameters of Chapter 6, for all three DEM, PM, and SR models.
8) Parallel_Profiles_Comparison_DEM_SR -> Excel file, containing all data for the axial profiles of all parameters of Chapter 6, for all three DEM, PM, and SR models.
9) Parametric_Studies -> Excel file, containing all data for the parametric studies related to Chapter 6, i.e., mesh independency study (Sheet "Mesh"), intraparticle porosity (Sheet "Porosity"), temperature (Sheet "Temperature" and "Bed-Temperature" for the 1- and 27-particle cases, respectively), WHSV (Sheet "WHSV" and "Bed - WHSV" for the 1- and 27-particle cases, respectively), and exothermicity (Sheet "Exothermicity").
10) Comp_time_Complete -> Excel file, data for the computational resources of all cases of Chapter 6, i.e., Table 6.2, Figure 6.30, and section F.9
11) Final_cases_DEM_vs_SR -> PowerPoint presentation containing all contour plots of figure 6
Associated publications:
The data of Chapter 4 has been published in the paper: DOI: 10.1039/D0FD00136H
The data of Chapter 5 has been published in the paper: DOI: 10.1016/j.apt.2022.103932
Contributors for data collection:
1) Matthew E. Potter, Orchid ID: 0000-0001-9849-3306, for help with the 5S catalytic beds of Chapter 5
2) Katy Rankin, Orchid ID: 0000-0002-8458-1038, for doing the Computed Tomography (CT) scans of the catalytic beds of Chapter 5.
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An approach to increasing the resolution of industrial CT images based on an aperture collimator
No full textThe spatial resolution of CT images is dominated by the focal spot size when it is large relative to the detector cells. We propose an approach to increase the spatial resolution by utilizing an aperture collimator. The aperture collimator is specially designed and placed in front of the X-ray source so that the rays penetrating the collimator form a set of narrow fan beams. Then an iterative algorithm is introduced to reconstruct CT images from the data obtained by scanning the narrow fan beams. Numerical experiments show that the proposed approach could significantly increase the resolution of the CT images. Furthermore, this approach is also robust against some challenging cases, such as the examination of low contrast object, reconstruction based on multi-energy data and perturbation of geometric errors in CT systems. (C) 2013 Optical Society of AmericaOpticsSCI(E)EI1ARTICLE2327946-279632
Author Co-Citation Analysis (ACA): a powerful tool for representing implicit knowledge of scholar knowledge workers
No full textIn the last decade, knowledge has emerged as one of the most important and valuable organizational assets. Gradually this importance caused to emergence of new discipline entitled ―knowledge management‖. However one of the major challenges of knowledge management is conversion implicit or tacit knowledge to explicit knowledge. Thus Making knowledge visible so that it can be better accessed, discussed, valued or generally managed is a long-standing objective in knowledge management. Accordingly in this paper author co- citation analysis (ACA) will be proposed as an efficient technique of knowledge visualization in academia (Scholar knowledge workers)
Verbeterde beeldreconstructie bij CT-scanners
No full textDe CT-scanner heeft een belangrijke rol in de medische wereld. Helaas gebruikt de CT-scanner voor het opstellen van een scan schadelijke straling. In dit onderzoek is nagegaan of er een betere beeldreconstructietechniek te vinden is voor het opstellen van een CT-afbeelding met gebruik van minder straling.De standaard voor het opstellen van een CT-afbeelding is het gebruik van de 2-norm. Vergelijken we de CT-afbeeldingen geconstrueerd met de 2-norm met CT-afbeeldingen geconstrueerd met de 1-norm en 0.5-norm dan zien we dat de 1-norm visueel het beste resultaat oplevert.Naast het vergelijken van de verschillende normen hebben we ook verschillende epsilon-regularisatiemethodes bekeken. De numerieke experimenten met de verschillende epsilon-regularisatiemethodes hebben we uitgevoerd op een systeem met 0%, 3% en 10% ruis, om te onderzoeken welke methode het beste toepasbaar is in de praktijk. Van de door ons geteste epsilon-regularisatiemethodes bleek de epsilon-regularisatie met epsilon := epsilon/2 met startwaarde epsilon = 10^(-8) en gebruik van de 1-norm de meest geschikte methode om een onderbepaald CT-probleem op te lossen
MRI-based synthetic CT in the detection of knee osteoarthritis: Comparison with CT
No full textMagnetic resonance Imaging is the gold standard for assessment of soft tissues; however, X-ray-based techniques are required for evaluating bone-related pathologies. This study evaluated the performance of synthetic computed tomography (sCT), a novel MRI-based bone visualization technique, compared with CT, for the scoring of knee osteoarthritis. sCT images were generated from the 3T T1-weighted gradient-echo MR images using a trained machine learning algorithm. Two readers scored the severity of osteoarthritis in tibiofemoral and patellofemoral joints according to OACT, which enables the evaluation of osteoarthritis, from its characteristics of joint space narrowing, osteophytes, cysts and sclerosis in CT (and sCT) images. Cohen's κ was used to assess the interreader agreement for each modality, and intermodality agreement of CT- and sCT-based scores for each reader. We also compared the confidence level of readers for grading CT and sCT images using confidence scores collected during grading. Inter-reader agreement for tibiofemoral and patellofemoral joints were almost-perfect for both modalities (κ = 0.83–0.88). The intermodality agreement of osteoarthritis scores between CT and sCT was substantial to almost-perfect for tibiofemoral (κ = 0.63 and 0.84 for the two readers) and patellofemoral joints (κ = 0.78 and 0.81 for the two readers). The analysis of diagnosis confidence scores showed comparable visual quality of the two modalities, where both are showing acceptable confidence levels for scoring OA. In conclusion, in this single-center study, sCT and CT were comparable for the scoring of knee OA.</p
Automatic Atlas Based Analysis of Radiotracer Uptake in Bones from Fused Nuclear Imaging/CT Data Sets of Mice
No full textPreclinical in vivo imaging is a powerful tool used for a wide variety of biomedical research applications including oncology, cardiac disease, and neurological disease. Disease physiology can be imaged in vivo with molecular imaging such as PET and SPECT. Quality analysis of molecular in vivo images currently requires an expert technician. The feasibility of large preclinical molecular imaging studies is limited by the man hours required to process the overwhelming amount of data created from preclinical scans. Our proposed solution to the bottle neck of manual image analysis is to implement automation of preclinical molecular image analysis. The method described in this study automatically registers different bone regions of interest in fused molecular imaging/CT scans. Automated analysis can run without supervision from a user, allowing for an increase in image processing throughput compared to manual analysis. The results of this novel image analysis show that atlas based registration of CT data is possible with a moderate degree of accuracy. Using this registration method to generate radiotracer uptake values for different bone groups resulted in mixed success. Bones that are registered first; skull, spine, pelvis, had automated radiotracer uptake measurements that correlated highly with the manual radiotracer uptake measurements. Bones that were last to be registered; tibia, hindpaws, were susceptible to large amounts of variation from the manual radiotracer uptake measurements. Large improvements to the accuracy of the results could be made by ensuring the accuracy of the joint registration of the atlas to the CT dataset
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