175 research outputs found
Supplemental Material - Interobserver Variability in the Assessment of Fluorescence Angiography in the Colon
No full textSupplemental Material for Interobserver Variability in the Assessment of Fluorescence Angiography in the Colon by Antonio S. Soares, Neil T. Clancy, Sophia Bano, Imran Raza, Michelle Diana, Laurence B. Lovat, Danail Stoyanov, and Manish Chand in Surgical Innovation</p
Pragmatic mathematics : representations of thought and action
No full textThis philosophical essay canvasses a number of themes in relation to a more inclusive approach to school mathematics for both Indigenous and non-Indigenous students. As an alternative to current arrangements, the term 'pragmatic mathematics' is suggested as an organising concept of primary and secondary mathematics that emphasises learning by doing and reflection. Accordingly, the essay criticises school mathematics as being overly formalist and procedural and lacking a basis of socio-cultural practice. On the other hand, it is argued that pragmatic mathematics builds upon the enquiry philosophy of Dewey (see McDermott, 1981) and encourages long-term cycles of reflective practice where original and personal mathematical ideas are constructed from personal experience. Learning outcomes are uncertain and are not specified, but do occur within a framework of recognised mathematical knowledge. Clearly, pragmatic mathematics must be democratic and interpretive in orientation and not impose predetermined truth on learners
An endoscopic structured light system using multispectral detection
No full textPURPOSE: In clinical examinations, the tissue surface topology is an important feature for detecting the tissue pathology and implementing augmented reality. We have previously presented a miniaturised structured light (SL) system for recovery of tissue surface shape in minimally invasive surgery (MIS), based on a flexible multispectral structured illumination probe (1.9 mm diameter) (Clancy et al. in Biomed Opt Express 2(11):3119-3128, 2011. doi: 10.1364/BOE.2.003119 ). This paper reports further hardware and analytical developments to improve the light pattern decoding result and increase the reconstruction accuracy. METHODS: The feasibility of using an 8-band multispectral camera with higher pattern-colour discrimination ability than normal RGB camera in this system was studied. Additionally, the "normalised cut" algorithm was investigated to improve pattern segmentation. RESULTS: The whole SL system was evaluated by phantom and in vivo experiments. Higher pattern identification performance than that of an RGB camera was recorded by using the multispectral camera (average precision >97 %, average sensitivity >62 %). An average of [Formula: see text] reconstruction error was achieved using the proposed pattern decoding method on a heart phantom at a working distance of approximately 10 cm. CONCLUSIONS: The experiment showed the superiority of the multispectral camera over the RGB camera in the spot identification step. The proposed pattern decoding algorithm underwent evaluations using different experiments, showing that it provided promising reconstruction results. The potential of using this system in MIS environments has been demonstrated
The Royal Academy of Arts In North Yorkshire:Curated by Norman Ackroyd RA, at the Zillah Bell Gallery, Thirsk
No full textTwo wood engravings exhibited: In the Grass & In the Room Fellow exhibitors: Gillian Ayers, Trevor Banthorpe, Mychael Barratt, Christiane Baumgarter, Elizabeth Blackadder, Louisa Boyd, Frea Buckler, John Carter, Stephen Chambers, Gordon Cheung, Niamh Clancy, Michael Craig-Martin, Ian Davenport, Martin Davidson, Anne Desmet, John Duffin, Stephen Farthing, Peter Freeth, Stephen Gibbs, Jane Glynn, Paul Hawdon, Steven Hubbard, Albert Irwin, Bill Jacklin, Allen Jones, Mark Jones, Miles Lauterwasser, Emma Lawrenson, Sasa Marinkov, Toni Martina, Flora McLachlan, Johanna Melvin, Mali Morris, Chris Orr, Dettmer Otto, Cornelia Parker, T Pateman, Andrew Pavitt, Hilary Paynter, Tom Phillips, Howard Phipps, Sioban Piercy, Neil Pittaway, Barbara Rae, Tamsin Reilly, Ian Ritchie, Richard Spare, Joe Tilson
Valuing the risk associated with willow and miscanthus relative to conventional agricultural systems
No full textThe agronomic characteristics of willow and miscanthus make these crops highly susceptible to risk. This is particularly true in a country such as Ireland which has limited experience in the production of these crops. Issues such as soil and climate suitability have as yet to be resolved. The lengthy production lifespan of energy crops only serve to heighten the level of risk that affects key variables. The uncertainty surrounding the risk variables involved in producing willow and miscanthus, such as the annual yield level and the energy price, make it difficult to accurately calculate the returns of such a project. The returns from willow and miscanthus are compared with those of conventional agricultural enterprises using Stochastic Efficiency with Respect to a Function (SERF). A risk premium is calculated which farmers would need to be compensated with in order for them to be indifferent between their current enterprise and switching to biomass crop production. With the exception of spring barley, a risk premium is required if farmers are to be indifferent between their current enterprise and willow or miscanthus. The value of the risk premium required to entice farmers to switch to miscanthus production is significantly less than that required for willow. This suggests that a greater level of risk is associated with willow than with miscanthus.Biomass, SERF, Risk Premium, Resource /Energy Economics and Policy, Risk and Uncertainty,
Effect of glucose on the optical properties of arterial blood using Mie theory simulations
No full textThe glucose concentration in arterial plasma has immediate effects on the optical properties of blood-bearing tissue due primarily to the alteration of refractive index mismatch between the scattering particles (red blood cells) and the medium (plasma). The influence of these effects on pulse oximetry is investigated using a numerical model based on Mie theory.
The objective is to determine whether or not physiological fluctuations in blood glucose levels could sufficiently vary the optical properties to shift the calibration curve of a commercial pulse oximeter significantly
POPULARIZING EGYPTIAN NATIONALISM: COLLOQUIAL CULTURE AND MEDIA CAPITALISM, 1870-1919 by
No full textRights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author
Investigation of Non-Traditional Applications of the Physical Level in Reconfigurable Computing
No full textMultiple research projects are proposed that utilize low-level knowledge of Field Programmable Gate Array (FPGA) and Application Specific Integrated Circuit (ASIC) design processes to enable additional research avenues. In order to accomplish these projects, Tools for Open Reconfigurable Computing (TORC) is utilized to provide a robust environment for circuit analysis and modifications. These projects rely on looking at the low-level constructs of the internals of these microchips. Through this knowledge, techniques for performing supply chain evaluations are proposed utilizing a non-binary comparison of multiple characteristic vectors between different FPGA manufacturing lots, and FPGAs that have been exposed to different environmental conditions. Second, techniques are proposed that look at design recovery by performing fuzzy segmentation and fuzzy matching algorithms to a problem area that has traditionally focused on exact graph sub-isomorphism solutions. Through these projects, additional research vectors are opened to protect and analyze the engineering efforts that are exerted in the design of FPGA and ASIC projects.Ph. D
Adaptation to environmental stress in the human placenta
No full textThe placenta mediates fetal growth by acting as a substrate for nutrient exchange between the mother and the fetus. Environmental factors such as altitude have been shown to result in reduced maternal-fetal exchange leading to reduced birth weight. To determine if differences in gene expression maybe contributing to physiological differences between individuals at high and low altitude, we tested for differences in gene expression and DNA methylation between Andean and European placental samples from La Paz (~4,000m) and Santa Cruz, Bolivia (~400m). Among the ancestry-associated differentially expressed genes, were genes involved in inflammation and placental specific pro-angiogenic macrophages, Hofbauer cells, contributing to increased capillary growth seen among Andeans residing at high altitude. Among the altitude-associated differentially expressed genes, we saw decreased expression of genes associated with the activator protein 1 (AP-1) transcription factor pathway and increased expression of genes involved in cytotrophoblast fusion including the gene dysferlin (DYSF). Upon closer examination we noticed that DYSF had a variant (rs10166384;G/A) at a methylation site with 3 levels of DNA methylation corresponding to individual genotypes. We tested for natural selection by sequencing a ~2.5kb fragment from 90 samples and performing Tajima’s D test across the sample groups. We found that balancing selection (Tajima’s D=2.37) was acting on a ~2.5kb fragment around our variant of interest among Andeans regardless of altitude. This suggests that balancing selection acting on dysferlin maybe altering DNA methylation patterns. Also, preservation of both the A and G alleles may aide Andeans in moving between altitudes.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2021-05-01The student, William Gundling, Jr., accepted the attached license on 2019-04-08 at 10:17.The student, William Gundling, Jr., submitted this Dissertation for approval on 2019-04-08 at 10:19.This Dissertation was approved for publication on 2019-04-08 at 14:24.DSpace SAF Submission Ingestion Package generated from Vireo submission #13364 on 2019-08-22 at 16:19:43Made available in DSpace on 2019-08-23T20:44:28Z (GMT). No. of bitstreams: 3
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Previous issue date: 2019-04-08Embargo set by: Seth Robbins for item 112246
Lift date: 2021-08-23T20:44:50Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 112246
Lift date: 2021-08-23T20:46:41Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 112246
Lift date: 2021-08-23T20:47:38Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 112246
Lift date: 2021-08-23T20:48:32Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemLimited Restriction Lifted for Item 112246 on 2021-08-24T09:15:28Z
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