320 research outputs found
A study of universal elements in classes of bases of topological spaces
No full textsummary:The universality problem focuses on finding universal spaces in classes of topological spaces. Moreover, in ``Universal spaces and mappings'' by S. D. Iliadis (2005), an important method of constructing such universal elements in classes of spaces is introduced and explained in details. Simultaneously, in ``A topological dimension greater than or equal to the classical covering dimension'' by D. N. Georgiou, A. C. Megaritis and F. Sereti (2017), new topological dimension is introduced and studied, which is called quasi covering dimension and is denoted by . In this paper, we define the base dimension-like function of the type dim, denoted by {b} - {dim}, and study the property of universality for this function. Especially, based on the method of ``Universal spaces and mappings'' by S. D. Iliadis (2005), we prove that in classes of bases which are determined by {b} - {dim} there exist universal elements
Covering Dimension and Universality Property on Frames
No full textStudies such as Dube et al. (Topology Appl. 160(18):2454–2464 2013), Georgiou et al. (Algebra Universalis 80(2):16, 2019), Iliadis (2005; Topology Appl. 179, 99–110, 2015; Topology Appl. 201, 92–109, 2016) focus on the notion of saturated class of spaces and frames and the existence of universal elements in such classes. Recently, the notion of dimension for frames has been combined with this universality property (Georgiou et al., Algebra Universalis 80(2):16, 2019; Iliadis, Topology Appl. 201:92–109, 2016). In this paper we study such a property, combining it with the notion of the covering dimension dim for frames (Charalambous, J. London Math. Soc. 8(2):149–160, 1974). We define the base dimension like-function of the type dim for frames and, based on the notion of the saturated class of bases, which is inserted and studied in Georgiou et al. (Order 37:427–444, 2020), we prove that in a class of bases which is characterized by this dimension there exist universal elements. Also, we study the notion of saturated class of frames, which is inserted in Georgiou et al. (Algebra Universalis 80(2):16, 2019), proving that in classes of frames which are determined by the covering dimension dim there exist universal elements. © 2021, The Author(s), under exclusive licence to Springer Nature B.V
Samozatrudnienie w świetle prawa Zjednoczonego Królestwa
No full textThe United Kingdom has noted a rapid increase in the number of self-employed persons in the last forty years. This has prompted a return to the debate on the regulation of this category of workers. What are the key characteristics of the self-employed? Are they covered by labour law and social security regulations? This chapter answers these questions by looking at the legal framework applicable to the self-employed in the UK. In section 2, the author characterizes the main tendencies regarding self-employed activity in the United Kingdom as presented in a report of the Office of National Statistics for 2020. In sections 3 and 4, she analyses the definition and the legal framework that guarantee protection applicable to the self-employed. The author places particular emphasis on the tri-partite character of the British legal system in individual employment law, which includes certain categories of self-employed in the British definition of worker. Finally, section 5 is devoted to the ever more popular phenomenon of “bogus self-employment” and the legal mechanisms designed to combat it.Przez ostatnie czterdzieści lat Zjednoczone Królestwo odnotowało gwałtowny wzrost liczby samozatrudnionych. Spowodowało to powrót do debaty nad uregulowaniami dotyczącymi tej kategorii wykonawców pracy. Jakie są główne cechy charakterystyczne samozatrudnionych? Czy podlegają oni prawu pracy i przepisom o zabezpieczeniu społecznym? Niniejszy rozdział odpowiada na powyższe pytania, analizując ramy prawne mające zastosowanie do samozatrudnionych w Wielkiej Brytanii. Autorka w punkcie 2 charakteryzuje główne tendencje w zakresie samozatrudnienia w Zjednoczonym Królestwie, które zostały przedstawione w raporcie brytyjskiego Głównego Urzędu Statystycznego (Office of National Statistics – ONS) za 2020 rok. W punktach 3 i 4 analizuje definicję i ramy prawne gwarantujące ochronę, która ma zastosowanie do samozatrudnionych. Autorka szczególny nacisk kładzie na trójpodział brytyjskiego systemu prawnego w indywidualnym prawie pracy, które włącza pewne kategorie samozatrudnionych do definicji „pracownika” (worker) obowiązującej w Zjednoczonym Królestwie. Na koniec w punkcie 5 przedstawione zostało coraz powszechniejsze zjawisko „fikcyjnego samozatrudnienia” oraz mechanizmy prawne służące do jego zwalczania
1-pass fixed-rate linear resampler in Matlab/Octave
No full text<p>DESCRIPTION:</p>
<p>This is a template stand-alone code (no externals required) for a simple 1-pass fixed rate linear resampler. Specifically, the script can be used as-is or as base for a function, which take a series of pairs <t,x> and a requested fixed resampling rate and it produces a new series of <t',x'> using stepwise linear regressors.</p>
<p>The script includes a data sorting step against <t>, which is not implemented here internally and can be removed if the input data are already expected to be sorted. In case of no sorting step here, the script is completely 1-pass, which means that all elements of the two input vectors (ref. points) are read only once for the entire resampling process. This is particularly useful when this implementation is to be applied directly to extremely large input files (e.g. columns in .csv) with only minimal memory usage for the calculations and only sequential read mode for speed.</p>
<p>Note: This work is supported by the DART project (H2020): "Data-Driven Aircraft Trajectory Prediction Research" (http://dart-research.eu) and the Data Science Lab (http://www.datastories.org) at the University of Piraeus, Greece (http://www.unipi.gr).</p>AUTHOR: Harris Georgiou (MSc,PhD) - IS/IT Engineer (R&D)
COPYRIGHT: Data Science Lab @ UniPi (c) 2017 - http://www.datastories.org
LICENCE: Creative Commons (CC-BY-SA) 4.0/I - http://creativecommons.or
Improving temporal interpolation of head and body pose using Gaussian process regression in a matrix completion setting
No full textThis paper presents a model for head and body pose estimation (HBPE) when labelled samples are highly sparse. The current state-of-the-art multimodal approach to HBPE utilizes the matrix completion method in a transductive setting to predict pose labels for unobserved samples. Based on this approach, the proposed method tackles HBPE when manually annotated ground truth labels are temporally sparse. We posit that the current state of the art approach oversimplifies the temporal sparsity assumption by using Laplacian smoothing. Our final solution uses: i) Gaussian process regression in place of Laplacian smoothing, ii) head and body coupling, and iii) nuclear norm minimization in the matrix completion setting. The model is applied to the challenging SALSA dataset for benchmark against the state-of-the-art method. Our presented formulation outperforms the state-of-the-art significantly in this particular setting, e.g. at 5% ground truth labels as training data, head pose accuracy and body pose accuracy is approximately 62% and 70%, respectively. As well as fitting a more flexible model to missing labels in time, we posit that our approach also loosens the head and body coupling constraint, allowing for a more expressive model of the head and body pose typically seen during conversational interaction in groups. This provides a new baseline to improve upon for future integration of multimodal sensor data for the purpose of HBPE.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Pattern Recognition and Bioinformatic
The translator as reader: the case of poetry translators from modern Greek into English.
No full textReader Response and Reception theories recognize that readerly activity during the reading process means that the reader draws on various resources, such as their knowledge of the world and of literary conventions. A more practical perspective with significant insights into the reader’s input comes from empirical explorations of literature (Hartman 1995, Peskin 1998, Hanauer 1998, 2001).
Within Translation Studies there have been some attempts at exploring the role of the reader during the translation process. Cognitive research, using think-aloud protocols and/or eye-tracking and keystroke logging as their methods, has offered valuable information that expands our understanding of what translators do when they read during the translation process (Englund Dimitrova 2005, Jakobsen 2003). In addition, several ‘situated theories’ (Flynn 2013) by translation scholars who are also practitioners has provided several categories with which to describe an initial, exploratory model of the translator as reader. These attempts have been sporadic and not entirely systematic and have been unable to produce a comprehensive picture of what the translator brings into the reading-for-translation process. The object of this study is to merge and expand these categories proposed by translation scholars (Beaugrande 1977, Diaz-Diocaretz 1985, Jones 2011) into a coherent model of the poetry translator as reader.
The expanded model is complemented by data from several different sources collected from Modern Greek into English poetry translators. The key issue of how the translatorial habitus affects the reading-for-translation phase is eplored through the examination of a corpus of paratexts created by or about these poetry translators. The study also draws data from the responses of twenty poetry translators to a survey and from ten semi-structured interviews with the same group of poetry translators for the exploration of the translatorial habitus. Finally, the effects of the translatorial habitus on the reading-for-translation phase are explored through verbal protocols with eight poetry translators
Asymptotic equivalence of differential equations with Stepanoff-bounded functional perturbation
No full textDeSyRe: on-Demand System Reliability
No full textThe DeSyRe project builds on-demand adaptive and reliable Systems-on-Chips (SoCs). As fabrication technology scales down, chips are becoming less reliable, thereby incurring increased power and performance costs for fault tolerance. To make matters worse, power density is becoming a significant limiting factor in SoC design, in general. In the face of such changes in the technological landscape, current solutions for fault tolerance are expected to introduce excessive overheads in future systems. Moreover, attempting to design and manufacture a totally defect and fault-free system, would impact heavily, even prohibitively, the design, manufacturing, and testing costs, as well as the system performance and power consumption. In this context, DeSyRe delivers a new generation of systems that are reliable by design at well-balanced power, performance, and design costs. In our attempt to reduce the overheads of fault-tolerance, only a small fraction of the chip is built to be fault-free. This fault-free part is then employed to manage the remaining fault-prone resources of the SoC. The DeSyRe framework is applied to two medical systems with high safety requirements (measured using the IEC 61508 functional safety standard) and tight power and performance constraints
Effects of Variations in Boundary Current Strength on the Export Pathways of Convected Water Masses in the Labrador Sea
No full textThe production of water masses formed by convection in the Labrador Sea (i.e. Labrador Sea Water, LSW) and its variability contributes to the variability of the Atlantic Meridional Overturning Circulation (AMOC). Several studies put the role of the Labrador Sea under renewed debate, and suggest a rather complex interplay between the production of the LSW, the boundary current and the eddy field. To this end, an increased effort is put in understanding the variability of the LSW, its export routes and associated export timescales. In this study, the effects of variations in boundary current strength on the export pathways of convected water masses are investigated. The same idealized eddy-resolving numerical model is used as Georgiou et al. (2019) which has proven to be capable of capturing the key dynamics of the Labrador Sea, like the annual cycle of convection, the process and timescales of restratification, and properties of the mesoscale eddy field. Model simulations are set-up with different scenarios of the density structure of the boundary current at inflow location (i.e. southern tip of Greenland). The variations result in respectively a 5% strengthening and 5% weakening of the boundary current, which corresponds to interannual variability of observed surface velocities. The model output demonstrates that boundary current variations start a chain of reactions, significantly changing the dynamics of the Labrador Sea. This has implications for deep convection processes in the interior of the basin and thus the export product. With a passive tracer analysis it is shown that convected water masses formed in the convection area are laterally steered along isopycnals by an eddy-induced shear flow from the interior towards the boundary current at the West-Greenland coast in deeper layers. A strengthening (weakening) of the boundary current yields a lighter (denser) water mass to be exported at shallower (deeper) layers out of the interior. The most intense entrainment into the boundary current occurs where both the density and depth of the convected water masses match the local water mass properties of the boundary current, and where eddies detach from the boundary current. The associated export timescales can be linked to the location where eddies detach, and to the strength of the eddy-induced shear flow. This study further highlights the implications for linking variability in the LSW production and export to AMOC variability as the total export of convected waters in the Labrador Sea is a mixture of multiyear convected waters. Based on density alone, measurements of water masses at the exit do not directly reveal the past-year dynamical state of the Labrador Sea. This emphasizes that a proper representation of mesoscale eddies in models is necessary for representing the export timescales and water mass properties of the LSW, and their response to changing forcing
Geometric local binary patterns a new approach to analyse texture in images
No full textIn image processing, applications such as quality inspection of surface degradation requires algorithms capable of differentiating similar textures. Exploring symmetries of local texture helps to increase the discriminance of texture algorithms. Particularly, Local Binary Pattern (LBP) techniques are highlighted in this field because their robustness against intensity variations. However, the sampling exploited by LBP operators based on symmetries cover basic neighbourhoods given by points on a circle that do not describe well in some cases the changes when the textures are similar. We present in this paper a new technique based on symmetries, called the Geometric Local Binary Pattern (GLBP) technique, that describe intensity changes using the information given by points on several circles. We compared one particular case of the GLBP technique with two configurations of the LBP technique, in which points on two circles with different radii were independently computed. We evaluated the performance of the algorithms in discriminating textures from a set composed with samples from the Brodatz texture database
- …
