6,470 research outputs found
Assessment of the statistical relevance of TR-PIV datasets
No full textThe increasing interest for high repetition rate global optical measurement techniques such as Time-Resolved Particle Image Velocimetry (TR-PIV) raises a number of questions concerning their ability to provide relevant statistical and spectral quantities. In an effort to address this issue, complementary TR-PIV and Laser Doppler Velocimetry (LDV) measurements have been carried out. An application to the analysis of the detached flow over a NACA 0015 airfoil at a Reynolds number Re=105 in a water tunnel is proposed
The Inevitability of Inconsistent Abstract Spaces
No full textion Mappings. In Proc. 10th IJCAI conference, pages 1011--1014. International Joint Conference on Artificial Intelligence, 1987. [Ten88] J.D. Tenenberg. Abstraction in Planning. PhD thesis, Computer Science Department, University of Rochster, 1988. Also TR 250. [UR89] A. Unruh and P. Rosenbloom. Abstraction in problem solving and learning. In Proc. 11th IJCAI conference. International Joint Conference on Artificial Intelligence, 1989. [GW89a] F. Giunchiglia and T. Walsh. Abstract Theorem Proving. In Proc. IJCAI 89, 1989. IRST Technical Report 8902-03. Also available as DAI Research Paper No 430, University of Edinburgh. [GW89b] F. Giunchiglia and T. Walsh. Theorem Proving with Definitions. In Proc. of the 7th Conference of the Society for the Study of Artificial Intelligence and Simulation of Behaviour, 1989. Also available as IRST Technical Report 8901-03 and DAI Research Paper No 429, Dept. of Artificial Intelligence, Edinburgh. [GW92] F. Giunchiglia and T. Walsh. A Theory of Abst..
Steven Sarson, Barack Obama: American Historian
No full textSteven Sarson, Barack Obama: American Historian London: Bloomsbury Academic, 2018. Pp. 357. ISBN 9781350032330. Marcus Walsh-Führing In the current bipartisan political climate, the ideological foundations of the United States government are under attack. Citizens across the country that support principles and laws in the Declaration of Independence and the Constitution have been disenchanted by current events and yearn for a time where the country’s common creed is upheld: “We hold these tr..
Characterisation of Miscanthus genetic resources: a combined analysis of plastid and nuclear microsatellites, nrDNA sequences, flow cytometry and morphology.
No full textDoctoral ThesisMiscanthus is a highly important forage and horticultural genus of perennial grasses
(Poaceae) primarily native to South East Asia. Miscanthus is under intense global
investigation as a biomass source for renewable energy production and several breeding initiatives are underway to develop new genotypes optimized for improved biomass and tolerance to a range of environmental stress conditions. A collection of 128 accessions belonging to the genus Miscanthus was established in Oak Park, Teagasc, Carlow, in 2008 and was investigated for morphological and molecular variation. Morphological traits were measured at the end of the second growing season and were compared with herbarium specimens of Miscanthus. Vegetative and inflorescence traits were scored and analysed using
basic summary statistics, tests of normality and Principal Components Analysis (PCA). A
large degree of morphological variation was recorded in the collections. The PCA of
herbarium specimens was able to separate some species from others but there was also
considerable overlap among species in the ordination, especially M. sacchariflorus, M.
sinensis, M. condensatus and M. floridulus. These are known to be closely related and can
interbreed. The PCA of the specimens from the Oak Park collection was less informative
because of missing data due to lack of inflorescences (accessions did not flower). It was clear that morphology alone is often insufficient to distinguish taxa especially when inflorescence characters and ploidy information is lacking. The ploidy level of the accessions in the collection was evaluated through flow cytometry.
The ploidy included di-, tri- and tetraploids. All individuals labelled as M. ×giganteus showed a triploid status, together with the newly bred M. sacchariflorus×M. sinensis hybrids.
Most M. sinensis were diploids. Miscanthus sinensis Tea-62 was triploid and comparable to the value of the M. ×giganteus. A different situation was found for other non-diploid M. sinensis, in particular four M. sinensis ‘Goliath’ and the M. sinensis ‘Zebrinus’ Tea-33. In these the ratio measured by the flowcytometer was in between the values of the triploid M. giganteus and tetraploid M. sacchariflorus standards. The ‘Goliath-like’ hybrid is likely an
autotriploid with three M. sinensis haploid sets, whereas M. ×giganteus is an allotriploid that is supposed to have two genomes from M. sinensis and one from M. sacchariflorus, which has a lower amount of DNA per haploid genome. DNA sequences of the internal transcribed spacer of the nrDNA were obtained for 76 genotypes in the collection and compared for polymorphism. The SNPs were particularly VI useful for differentiating M. sinensis, M. sacchariflorus and M. ×giganteus accessions and in combination with ploidy and morphology offer high potential for taxon identification. To gather more markers for population level diversity and differentiation studies, new microsatellite markers for both plastid and nuclear genomes were developed. For the development of plastid markers the chloroplast genome information of Saccharum officinarum was used. The nuclear SSRs (nSSRs) were developed from the sequences of 192
clones obtained from microsatellite enriched library. New primer pairs for the amplification of nineteen nuclear loci and six chloroplast loci were developed. Both chloroplast (cpSSR) and nSSR primers were used to characterise DNA variation, to help establish gene pools and to better understand hybridization and introgression. Huge genotypic variation was found
within the genus, mostly in the species M. sinensis. The markers showed wide utility across a large number of Miscanthus species and also some closely related genera. The analysis of the cpSSRs showed a high number of different haplotypes but with a clear bias in allele composition between M. sinensis and the two species M. sacchariflorus and M. ×giganteus,
thus confirming M. sacchariflorus as the maternal lineage of the hybrid M. xgiganteus. The nSSRs were found to be highly polymorphic across the collection and transferable to closely related genera such as Saccharum. The new markers were also used in UPGMA clustering and Bayesian structuring analysis to group individuals according to their similarity. Three major clusters of individuals were defined using the Bayesian STRUCTURE analysis with nuclear markers (nSSRs) and two with plastid markers (cpSSRs).
In conclusion, the morphological, ploidy, sequence and microsatellite results highlighted the high level of diversity still unexplored in the genus and have clarified taxon identity of many
accessions in the collection. A large set of new markers have been developed for the plant
breeding and systematics community. The newly developed markers will be useful to further explore this diversity and to select useful traits for breeding of new and improved genotypes for biomass production.Teagasc Walsh Fellowship; National Development Plan Irelan
Explicit evaluation of Walsh transforms of a class of Gold type functions
No full textLet K = F-2(k) denote the finite field of 2(k) elements. The Walsh transform of a class of Gold type functions f(x) = Tr-K (x(2a+1) + x(2b+1)), 0 <= a < b at alpha is an element of K is determined in recent results of Lahtonen et al. (2007) [7], Roy (2012) [10] and Cosgun et al. (2016) [2] under some restrictions on k, a, b and a. In this paper, we give explicit evaluation of the Walsh transforms off without any restriction on k, a, b and alpha. Therefore we improve and generalize the related results in literature. Furthermore, we evaluate the Walsh transform of a more general Gold type function f gamma(x) = Tr-K (gamma x(2a+1) + gamma x(2b+1)) 0 <= a < b at alpha is an element of K for any gamma is an element of F-2(k) boolean AND F-2(b-a) without any restriction on k, a, b and alpha
Kustverdediging na 1990 (Kustnota 1990): Technisch rapport 11: Strand en duinsuppleties
No full textIn Technisch Rapport 11 (TR 11) wordt een overzicht gegeven van de strand- en duinsuppleties, welke ter compensatie van kusterosie zijn uitgevoerd. In 1988 is het "Handboek zandsuppleties" uitgegeven. Hierin is een schat van gegevens verzameld over het desbetreffende onderwerp. Dit rapport voorziet in een aanvulling op het handboek, met meer recente gegevens. Overlapping van dit rapport met het handboek is zoveel mogelijk vermeden. Naast de aanvulling wordt ingegaan op de levensduur van suppleties en wordt een eerste aanzet gegeven om een puur economische afweging te maken tussen zandsuppleties, die nu een belangrijke maatregel bij kustverdediging zijn, en de bouw van strandhoofden, wat in het verleden een belangrijke maatregel geweest is. Zand wordt met grote drijvende werktuigen relatief goedkoop, als zandwatermengsel, verplaatst. Een netto-verplaatsing van 200.000 tot 500.000 kubieke meter zand per werktuig, per werkweek is haalbaar. Naarmate het zand hoger en verder op de oever gebracht wordt nemen de kosten toe.Kustnot
Development of the all-vanadium redox flow battery for energy storage: a review of technological, financial and policy aspects
No full textThe commercial development and current economic incentives associated with energy storage using redox flow batteries (RFBs) are summarised. The analysis is focused on the all-vanadium system, which is the most studied and widely commercialised RFB. The recent expiry of key patents relating to the electrochemistry of this battery has contributed to significant levels of commercialisation in, for example, Austria, China and Thailand, as well as pilot-scale developments in many countries. The potential benefits of increasing battery-based energy storage for electricity grid load levelling and MW-scale wind/solar photovoltaic-based power generation are now being realised at an increasing level. Commercial systems are being applied to distributed systems utilising kW-scale renewable energy flows. Factors limiting the uptake of all-vanadium (and other) redox flow batteries include a comparatively high overall internal costs of 0.10?kW?1?h?1. There is also a low-level utility scale acceptance of energy storage solutions and a general lack of battery-specific policy-led incentives, even though the environmental impact of RFBs coupled to renewable energy sources is favourable, especially in comparison to natural gas- and diesel-fuelled spinning reserves. Together with the technological and policy aspects associated with flow batteries, recent attempts to model redox flow batteries are considered. The issues that have been addressed using modelling together with the current and future requirements of modelling are outlined
Fast, high-density, and depth-sensitive time-resolved laser speckle contrast imaging (TR-LSCI) of cerebral blood flow
No full textImaging cerebral blood flow (CBF) is crucial for diagnosing cerebrovascular diseases. Conventional laser speckle contrast imaging (LSCI) offers high spatiotemporal resolution but limited penetration depth (<1 mm). This study introduces an innovative time-resolved laser speckle contrast imaging (TR-LSCI) technique, which illuminates picosecond-pulsed, coherent, widefield, near-infrared light onto the head and synchronizes a newly launched, ultrafast, high-resolution, picosecond-gated SPAD512^2 camera to continuously and rapidly capture CBF maps at different depths, thus reducing partial volume effects from the overlying skull. The new-generation TR-LSCI enabled 2D mapping of pulsatile CBF distributions in rodents with a fast-sampling rate of 21.1 Hz. The FFT analyses of pulsatile CBF maps revealed multiple harmonic frequency peaks, which corresponded to respiratory and heartbeat signals. The new TR-LSCI with high spatiotemporal resolution captures fast hemodynamic changes across different brain regions and generates large spatiotemporal datasets for extracting intracranial pressure information from measured pulsatile CBF waveforms using deep learning algorithms.AQU
Efficient Learning of Action Schemas and Web-Service Descriptions
No full textThis work addresses the problem of efficiently learning action schemas using a bounded number of samples (interactions with the environment). We consider schemas in two languages— traditional STRIPS, and a new language STRIPS+WS that extends STRIPS to allow for the creation of new objects when an action is executed. This modification allows STRIPS+WS to model web services and can be used to describe web-service composition (planning) problems. We show that general STRIPS operators cannot be ef- ficiently learned through raw experience, though restricting the size of action preconditions yields a positive result. We then show that efficient learning is possible without this restriction if an agent has access to a “teacher” that can provide solution traces on demand. We adapt this learning algorithm to efficiently learn web-service descriptions in STRIPS+WS.Technical report DCS-TR-63
When a Fine Diagnosis Isn\u27t Good Enough
No full textOcular flutter; Progressive cognitive and behavioral declineA 54-year old with a 6-month history of \u27dancing eyes\u27 and progressive cognitive and behavioral changes. Previous history significant hypertension and coronary angioplasty.Abnormal, intrusive eye momentsCT; MRIParaneoplastic limbic encephalitisAntimanic agents; Chemotherapy1. Savino PJ, Glaser JS. Opsoclonus. Pattern of regression in a child with neuroblastoma. Br J Ophthalmol 1975; 59: 696-8. 2. Miller NR, Newman NJ, Hoyt WF, et al. Walsh and Hoyt\u27s clinical neuro-ophthalmology. Baltimore: Williams & Wilkins, 1998. 3. Bernal F, Shams\u27ili S, Rojas I, et al. Anti- Tr antibodies as markers of paraneoplastic cerebellar degeneration and Hodgkin\u27s disease. Neurology 2003; 60: 230-4. 4. Chieng DC, Cangiarella JF, Symmans WF, et al. Fine-needle aspiration cytology of Hodgkin disease: a study of 89 cases with emphasis on false-negative cases. Cancer 2001; 93: 52-9
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