cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Regulating Greed Over Time in Multi-Armed Bandits
Creators: name: Tracà, Stefano
name: Rudin, Cynthia
name: Yan, Weiyu
Publisher: name: arXiv
Year: 2015
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: F.2.0; G.1.6; I.2.6
subject: 68Q32, 68T05, 91A60, 91A20

description: In retail, there are predictable yet dramatic time-dependent patterns in customer behavior, such as periodic changes in the number of visitors, or increases in customers just before major holidays. The current paradigm of multi-armed bandit analysis does not take these known patterns into account. This means that for applications in retail, where prices are fixed for periods of time, current bandit algorithms will not suffice. This work provides a remedy that takes the time-dependent patterns into account, and we show how this remedy is implemented for the UCB, $\varepsilon$-greedy, and UCB-L algorithms, and also through a new policy called the variable arm pool algorithm. In the corrected methods, exploitation (greed) is regulated over time, so that more exploitation occurs during higher reward periods, and more exploration occurs in periods of low reward. In order to understand why regret is reduced with the corrected methods, we present a set of bounds that provide insight into why we would want to exploit during periods of high reward, and discuss the impact on regret. Our proposed methods perform well in experiments, and were inspired by a high-scoring entry in the Exploration and Exploitation 3 contest using data from Yahoo$!$ Front Page. That entry heavily used time-series methods to regulate greed over time, which was substantially more effective than other contextual bandit methods.
description: Published in JMLR (Journal of Machine Learning Research). The paper contains algorithms, theorems, proofs, and experimental results with synthetic and real data. url: http://jmlr.org/papers/v22/17-720.html
Automated Assessment of Transthoracic Echocardiogram Image Quality Using Deep Neural Networks
Creators: name: Labs, Robert B.
name: Vrettos, Apostolos
name: Loo, Jonathan
name: Zolgharni, Massoud
Publisher: name: arXiv
Year: 2022
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Quantitative Methods (q-bio.QM)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Standard views in two-dimensional echocardiography are well established but the quality of acquired images are highly dependent on operator skills and are assessed subjectively. This study is aimed at providing an objective assessment pipeline for echocardiogram image quality by defining a new set of domain-specific quality indicators. Consequently, image quality assessment can thus be automated to enhance clinical measurements, interpretation, and real-time optimization. We have developed deep neural networks for the automated assessment of echocardiographic frame which were randomly sampled from 11,262 adult patients. The private echocardiography dataset consists of 33,784 frames, previously acquired between 2010 and 2020. Deep learning approaches were used to extract the spatiotemporal features and the image quality indicators were evaluated against the mean absolute error. Our quality indicators encapsulate both anatomical and pathological elements to provide multivariate assessment scores for anatomical visibility, clarity, depth-gain and foreshortedness, respectively.
(102398) Margaret Anna [Overton]
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Computing integral bases via localization and Hensel lifting
Creators: name: Boehm, Janko
name: Decker, Wolfram
name: Laplagne, Santiago
name: Pfister, Gerhard
Publisher: name: arXiv
Year: 2015
Subjects: subject: Commutative Algebra (math.AC)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 13B22 (Primary), 14H20, 13P10, 13H99 (Secondary)

description: We present a new algorithm for computing integral bases in algebraic function fields of one variable, or equivalently for constructing the normalization of a plane curve. Our basic strategy makes use of the concepts of localization and completion, together with the Chinese remainder theorem, to reduce the problem to the task of finding integral bases for the branches of each singularity of the curve. To solve the latter task, in turn, we work with suitably truncated Puiseux expansions. In contrast to van Hoeij's algorithm, which also relies on Puiseux expansions (but pursues a different strategy), we use Hensel's lemma as a key ingredient. This allows us at some steps of the algorithm to compute factors corresponding to conjugacy classes of Puiseux expansions, without actually computing the individual expansions. In this way, we make substantially less use of the Newton-Puiseux algorithm. In addition, our algorithm is inherently parallel. As a result, it outperforms in most cases any other algorithm known to us by far. Typical applications are the computation of adjoint ideals and, based on this, the computation of Riemann-Roch spaces and the parametrization of rational curves.
description: 47 pages; revised structure
Research in Teacher Education: Volume 2, No.2, October 2012
Creators: name: Garby-Czerniawski, Gerry
name: Morris, Andrew
name: Dalladay, Christopher
name: Murray, Jean
name: Read, Andrew
name: Lewis, Elicia
name: Rubiano, Clara
name: O'Brien, Jim
name: Betts, Paul
name: Wells, David
name: Macklin, John
name: Read, Andrew
name: Clifford, Paul
Publisher: name: The School of Education and Communities, University of East London
Year: 2012

description: The Research in Teacher Education publication is published twice a year by the School of Education and Communities, University of East London, Water Lane, London E15 4LZ. The periodical offers a forum for informed debate and discussion on all aspects of teacher education. The publication showcases work from the teacher education teams at the School of Education and Communities and the wider teacher education community in the UK.

The definition of ‘research’, in its broadest sense includes any gathering of data, information and ‘facts’ designed to advance knowledge. While nurturing and publicising the creative talent within teacher education the periodical seeks to stimulate, provoke and extend discussion and debate with other professionals associated with this field. In addition to contributions from the team of teacher educators at the School, each edition of Research in Teacher Education will publish research findings, book reviews and/or opinion pieces from guest writers associated with the School of Education and Communities.
Galaxy sizes as a function of environment at intermediate redshift from the ESO Distant Cluster Survey
Creators: name: Kelkar, Kshitija
name: Aragón-Salamanca, Alfonso
name: Gray, Meghan E.
name: Maltby, David
name: Vulcani, Benedetta
name: De Lucia, Gabriella
name: Poggianti, Bianca M.
name: Zaritsky, Dennis
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In order to assess whether the environment has a significant effect on galaxy sizes, we compare the mass--size relations of cluster and field galaxies in the $0.4 < z < 0.8$ redshift range from the ESO Distant Cluster Survey (EDisCS) using HST images. We analyse two mass-selected samples, one defined using photometric redshifts ($10.2 \le \log M_\ast/M_{\odot} \le 12.0$), and a smaller more robust subsample using spectroscopic redshifts ($10.6 \le \log M_\ast/M_{\odot} \le 11.8$). We find no significant difference in the size distributions of cluster and field galaxies of a given morphology. Similarly, we find no significant difference in the size distributions of cluster and field galaxies of similar rest-frame $B-V$ colours. We rule out average size differences larger than $10$--$20$\% in both cases. Consistent conclusions are found with the spectroscopic and photometric samples. These results have important consequences for the physical process(es) responsible for the size evolution of galaxies, and in particular the effect of the environment. The remarkable growth in galaxy size observed from $z\sim2.5$ has been reported to depend on the environment at higher redshifts ($z>1$), with early-type/passive galaxies in higher density environments growing earlier. Such dependence disappears at lower redshifts. Therefore, if the reported difference at higher-$z$ is real, the growth of field galaxies has caught up with that of cluster galaxies by $z\sim1$. Any putative mechanism responsible for galaxy growth has to account for the existence of environmental differences at high redshift and their absence (or weakening) at lower redshifts.
description: 11 pages, 5 figures. Accepted for publication in MNRAS
Considering cross-phase peer mentoring in ITE: what can each party bring to the table?
Creators: name: Lewis, Elicia
Publisher: name: University of East London, Cass School of Education and Communities
Year: 2014
Subjects: cross-phase
peer mentoring
third space
virtual mentoring

description: Whilst the centrality of mentoring to successful outcomes in Initial Teacher Education (ITE) in England is uncontroversial and widely discussed, there has been less research on peer mentoring. Much of the literature that exists focuses on the role peer mentoring can play in helping tertiary students or beginning teachers to adjust to their new role and legitimise concerns (Draves & Koops 2011). However, there has been a dearth of research on the efficacy of peer mentoring in developing the subject knowledge and pedagogy of ITE students. This small-scale exploratory study looks at whether peer mentoring in ITE can be mutually beneficial in developing each member’s subject knowledge and pedagogy, where dyads are training to teach different age ranges. This cross-phased pairing aims to provide a liminal space where the gap between theory and practice is negotiated, and individual goals can be addressed.
(102399) William M Overton
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Locating the third space in Initial Teacher Training
Creators: name: Lewis, Elicia
Publisher: name: University of East London, Cass School of Education and Communities
Year: 2012
Subjects: third space
partnerships
ITE
mentors
university mentoring

description: Since changes to Initial Teacher Education (ITE) in 1992, school–university partnerships for Postgraduate Certificate in Education (PGCE) courses in the UK have grown closer than ever. Yet, even with lessened hierarchy and increased dialogue, gaps between what is learnt at university and what is experienced at school remain. Taking Bhabha and Zeichner’s use of the theoretical concept of ‘third space’, this exploratory paper documents the author’s attempt to locate and negotiate a hybrid space where a cohort of religious education (RE) student teachers’ experiences can be mediated, and the gap between theory and practice reduced.
Path count asymptotics and Stirling numbers
Creators: name: Varchenko, A.
name: Petersen, K.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: We obtain formulas for the growth rate of the numbers of certain paths in a multi-dimensional analogue of the Eulerian graph. Corollaries are new identities relating Stirling numbers of the first and second kinds.
Optimal Search Trees with 2-Way Comparisons
Creators: name: Chrobak, Marek
name: Golin, Mordecai
name: Munro, J. Ian
name: Young, Neal E.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences
subject: E.4; G.1.6; G.2.2; H.3.1; I.4.2
subject: 68P10, 68P30, 68W25, 94A45,

description: In 1971, Knuth gave an $O(n^2)$-time algorithm for the classic problem of finding an optimal binary search tree. Knuth's algorithm works only for search trees based on 3-way comparisons, while most modern computers support only 2-way comparisons (e.g., $$). Until this paper, the problem of finding an optimal search tree using 2-way comparisons remained open -- poly-time algorithms were known only for restricted variants. We solve the general case, giving (i) an $O(n^4)$-time algorithm and (ii) an $O(n \log n)$-time additive-3 approximation algorithm. Also, for finding optimal binary split trees, we (iii) obtain a linear speedup and (iv) prove some previous work incorrect.
description: ERRATUM: The proof of Theorem 3 of the ISAAC'15 paper (v4 here) is incorrect. Version v5 here contains: a full erratum, proofs of the other results, and pointers to journal versions expanding those results
When Gove became bigger than God: using social bookmarking to track subject knowledge development and student priorities in Initial Teacher Training
Creators: name: Lewis, Elicia
Publisher: name: The School of Education and Communities, University of East London
Year: 2011
Subjects: Initial teacher training
social bookmarking

description: T his paper explores the potential for the use of social bookmarking to do two things: to support knowledge development during the religious education (RE) Initial Teacher Training course, and to aid the formative assessment of trainees. This paper
has arisen out of an ongoing exploratory pilot project examining the potential of RE student-teacherled trials of a free web-based social bookmarking application. Tentative conclusions of this exploratory
paper are drawn from the descriptive analyses of users of the web-based application, the resulting group folksonomy, and the generation of asynchronous
discussions. The results give an insight into trainee RE teachers’ subject-knowledge development priorities throughout the course, as well as general subject-related concerns.
Vacuum polarization instead of "dark matter" in a galaxy
Creators: name: Cherkas, Sergey L.
name: Kalashnikov, Vladimir L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We considered a vacuum polarization inside a galaxy in the eikonal approximation and found that two possible types of polarization exist. The first type is described by the equation of state $p=ρ/3$, similar to radiation. Using the conformally-unimodular metric allows constructing a nonsingular solution for this vacuum ``substance'', if a compact astrophysical object exists in the galaxy's center. As a result, a ``dark'' galactical halo appears that increases the rotation velocity of a test particle as a function of the distance from a galactic center. The second type of vacuum polarization has a more complicated equation of state. As a static physical effect, it produces renormalization of the gravitational constant, thus, causing no static halo. However, a nonstationary polarization of the second type, resulting from an exponential increase (or decrease) of the galactic nuclei mass with time in some hypothetical time-dependent process, produces a gravitational potential looking like a dark matter halo.
description: 16 pages, 6 figures
The ideal energy of classical lattice dynamics
Creators: name: Margolus, Norman
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: Information Theory (cs.IT)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We define, as local quantities, the least energy and momentum allowed by quantum mechanics and special relativity for physical realizations of some classical lattice dynamics. These definitions depend on local rates of finite-state change. In two example dynamics, we see that these rates evolve like classical mechanical energy and momentum.
description: 12 pages, 4 figures, includes revised portion of arXiv:0805.3357
Research in Teacher Education: Volume 7, No.2, November 2017
Creators: name: Garby-Czerniawski, Gerry
name: Herrington, Neil
name: Hicks, Christina
name: Viswarajan, Sheeba
name: Oberholzer, Lizana
name: Challen, Christine
name: Fautley, Martin
name: Theodotou, Evgenia
name: Shanks, Rachel
name: Hunt, Ruth
Publisher: name: The School of Education and Communities, University of East London
Year: 2017

description: The Research in Teacher Education publication is published twice a year by the School of Education and Communities, University of East London, Water Lane, London E15 4LZ. The periodical offers a forum for informed debate and discussion on all aspects of teacher education. The publication showcases work from the teacher education teams at the School of Education and Communities and the wider teacher education community in the UK.

The definition of ‘research’, in its broadest sense includes any gathering of data, information and ‘facts’ designed to advance knowledge. While nurturing and publicising the creative talent within teacher education the periodical seeks to stimulate, provoke and extend discussion and debate with other professionals associated with this field. In addition to contributions from the team of teacher educators at the School, each edition of Research in Teacher Education will publish research findings, book reviews and/or opinion pieces from guest writers associated with the School of Education and Communities.
Laptop requirement usage and impact in graduate ILS education
Creators: name: Li, Bin
name: Newby, Gregory
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2002

description: A new requirement for personal laptop computer ownership was implemented for graduate information and library science (ILS) students. This study evaluates the impact and usage of laptop computers, and the real and envisioned benefits of laptop ownership during the first six months of the requirement’s implementation. Online and email surveys were used for data gathering, and a combination of quantitative and qualitative data were collected. Student perspectives were emphasized, and institutional background were examined. It was found that students' reaction to the requirement and their usage of laptops was influenced by their previous experiences with computers, their computer skills, and their expectations of the academic program. Understanding of Institutional context of laptop implementation was found to be important for the success of the program.
Skewed Task Conflicts in Teams: What Happens When a Few Members See More Conflict Than the Rest?
Creators: name: Edwards, Jeffery R.
name: Sinha, Ruchi
name: Janardhanan, Niranjan S.
name: Greer, Lindred L.
name: Conlon, Donald E.
Publisher: name: American Psychological Association (APA)
Year: 2016

description:
Task conflict has been the subject of a long-standing debate in the literature-when does task conflict help or hurt team performance? We propose that this debate can be resolved by taking a more precise view of how task conflicts are perceived in teams. Specifically, we propose that in teams, when a few team members perceive a high level of task disagreement while a majority of others perceive low levels of task disagreement-that is, there is positively skewed task conflict, task conflict is most likely to live up to its purported benefits for team performance. In our first study of student teams engaged in a business decision game, we find support for the positive relationship between skewed task conflict and team performance. In our second field study of teams in a financial corporation, we find that the relationship between positively skewed task conflict and supervisor ratings of team performance is mediated by reflective communication within the team. (PsycINFO Database Record
(102395) Florence Barnett
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Rational quantum integrable systems of D_N type with polarized spin reversal operators
Creators: name: Basu-Mallick, B.
name: Datta, C.
name: Finkel, F.
name: Gonzalez-Lopez, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study the spin Calogero model of D_N type with polarized spin reversal operators, as well as its associated spin chain of Haldane-Shastry type, both in the antiferromagnetic and ferromagnetic cases. We compute the spectrum and the partition function of the former model in closed form, from which we derive an exact formula for the chain's partition function in terms of products of partition functions of Polychronakos-Frahm spin chains of type A. Using a recursion relation for the latter partition functions that we derive in the paper, we are able to numerically evaluate the partition function, and thus the spectrum, of the D_N-type spin chain for relatively high values of the number of spins N. We analyze several global properties of the chain's spectrum, such as the asymptotic level density, the distribution of consecutive spacings of the unfolded spectrum, and the average degeneracy. In particular, our results suggest that this chain is invariant under a suitable Yangian group, and that its spectrum coincides with that of a Yangian-invariant vertex model with linear energy function and dispersion relation.
description: 26 pages, 5 figures, typeset in LaTeX
Stem Cell For Researchers
Creators: name: Mohammadi, Aliasghar Tabatabaei
name: Bagheri, Hossein
name: Seyyed Ghavam Shafagh
name: Amirhosein Larijani
name: Danyal Farajnia Rick
name: Houra Fazlavargharebagh
Publisher: name: Zenodo
Year: 2022
Subjects: Stem Cell
Research

description: 1.introduction 2. Properties Self-renewal Potency meaning Identification 3. Embryonic stem cells 4. Amniotic 5. Fetal stem cells 6. Adult stem cells 7. Dental stem and drugs
 8. Cancer stem cell and drugs 9. Induced pluripotent stem cells 10. Stem Cells and MicroRNAs 11. Therapies
Atmospheric chamber study of oil shale fly ash particles from circulating fluidized bed and pulverized firing processes
Creators: name: Teinemaa, Erik
name: Urb, Gary
name: Kamens, Richard M.
name: Kirso, Uuve
name: Tenno, Toomas
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2012

description: Oil shale combustion fly ash collected to electric precipitators from pulverized firing (PF) and circulating fluidized bed combustion (CFB) processes was investigated in atmospheric chamber experiments. The aim of the work was to detect differences in the atmospheric behaviour of the fine particles from CFB and PF boilers of the Estonian Power Plant (PP), located close to Narva, Estonia. One series of experiments was performed in a dual outdoor Teflon film smog chamber (270 m3) at the University of North Carolina at Chapel Hill (USA) under normal weather conditions (temperature, humidity, sunlight). Parallel tests were carried out in an outdoor smog chamber (108 m3) at Tuulna, Harju County, Estonia, where the experiment was made under meteorological conditions similar to those at the location of the PP. The size distribution and number concentration of particles in the chamber were monitored during the experiment. The fractional distribution results demonstrate that the CFB aerosol in the chamber air had more fine particles than the PF aerosol. Approximately 2 h after injection the fly ash particles larger than 4 μm had settled out from both samples. The initial fly ash aerosol had a trimodal fractional distribution. Both PF and CFB fly ash formed stable aerosols 1–3 μm in diameter during the 6 h experiment and are therefore prone to long-range transport.
Complexity Analysis of Charged Dynamical Dissipative Cylindrical Structure in Modified Gravity
Creators: name: Sharif, M.
name: Naseer, Tayyab
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This article focuses on the formulation of some scalar factors which are uniquely expressed in terms of matter variables for dynamical charged dissipative cylindrical geometry in a standard gravity model $\mathcal{R}+Φ\mathcal{Q}$ ($Φ$ is the coupling parameter, $\mathcal{Q}=\mathcal{R}_{φ\vartheta}\mathcal{T}^{φ\vartheta}$) and calculates four scalars by orthogonally decomposing the Riemann tensor. We find that only $\mathcal{Y}_{TF}$ involves inhomogeneous energy density, heat flux, charge and pressure anisotropy coupled with modified corrections, and thus call it as complexity factor for the considered distribution. Two evolutionary modes are discussed to study the dynamics of cylinder. We then take the homologous condition with $\mathcal{Y}_{TF}=0$ to calculate unknown metric potentials in the absence as well as presence of heat dissipation. The stability criterion of the later condition is also checked throughout the evolution by applying some constraints. We conclude that the effects of charge and modified theory yield more complex system.
description: 30 pages, no figure
Block Basis Factorization for Scalable Kernel Matrix Evaluation
Creators: name: Wang, Ruoxi
name: Li, Yingzhou
name: Mahoney, Michael W.
name: Darve, Eric
Publisher: name: arXiv
Year: 2015
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Kernel methods are widespread in machine learning; however, they are limited by the quadratic complexity of the construction, application, and storage of kernel matrices. Low-rank matrix approximation algorithms are widely used to address this problem and reduce the arithmetic and storage cost. However, we observed that for some datasets with wide intra-class variability, the optimal kernel parameter for smaller classes yields a matrix that is less well approximated by low-rank methods. In this paper, we propose an efficient structured low-rank approximation method -- the Block Basis Factorization (BBF) -- and its fast construction algorithm to approximate radial basis function (RBF) kernel matrices. Our approach has linear memory cost and floating-point operations for many machine learning kernels. BBF works for a wide range of kernel bandwidth parameters and extends the domain of applicability of low-rank approximation methods significantly. Our empirical results demonstrate the stability and superiority over the state-of-art kernel approximation algorithms.
description: 16 pages, 5 figures
Research in Teacher Education: Volume 9, No.2, Novermber 2019
Creators: name: Iqbal, Fehmida
name: Kidd, Warren
name: Schilling, L.
name: Tyrer, C.
name: Khanum, R.
name: Raleigh, C.
name: Roberts, D.
name: Löbler, H.
name: Challen, C.
name: Spicksley, K.
name: Mackrory, David
name: Leiss, D.
name: Theodotou, Evgenia
name: Mcmahon, Andrea
name: Viswarajan, Sheeba
name: Maier, M.
name: Markgraf, D.
Publisher: name: The School of Education and Communities, University of East London
Year: 2019

description: The Research in Teacher Education publication is published twice a year by the School of Education and Communities, University of East London, Water Lane, London E15 4LZ. The periodical offers a forum for informed debate and discussion on all aspects of teacher education. The publication showcases work from the teacher education teams at the School of Education and Communities and the wider teacher education community in the UK.

The definition of ‘research’, in its broadest sense includes any gathering of data, information and ‘facts’ designed to advance knowledge. While nurturing and publicising the creative talent within teacher education the periodical seeks to stimulate, provoke and extend discussion and debate with other professionals associated with this field. In addition to contributions from the team of teacher educators at the School, each edition of Research in Teacher Education will publish research findings, book reviews and/or opinion pieces from guest writers associated with the School of Education and Communities.
(102390) Walter Meyrick Overton
Creators: name: Professions, Victorian
Publisher: name: University of Oxford
Year: 2022
Subjects: subject: 220201 Business and Labour History
subject: FOS: Philosophy, ethics and religion
subject: History
subject: 140203 Economic History
subject: FOS: Economics and business

description: This three-year research project began in January 2014 and investigated whether, during the Victorian period, the professions formed a distinct self-sustaining social group with its own mores and values. The project looked at 16,000 individuals drawn from census data for Alnwick, Brighton, Bristol, Dundee, Greenock, Leeds, Merthyr Tydfil, Morpeth, and Winchester. The research project was funded by the UK Economic & Social Research Council and was based at the Universities of Oxford and Northumbria.
Classification of eye-state using EEG recordings: speed-up gains using signal epochs and mutual information measure
Creators: name: Asquith, Phoebe M
name: Ihshaish, Hisham
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: The classification of electroencephalography (EEG) signals is useful in a wide range of applications such as seizure detection/prediction, motor imagery classification, emotion classification and drug effects diagnosis, amongst others. With the large number of EEG channels acquired, it has become vital that efficient data-reduction methods are developed, with varying importance from one application to another. It is also important that online classification is achieved during EEG recording for many applications, to monitor changes as they happen. In this paper we introduce a method based on Mutual Information (MI), for channel selection. Obtained results show that whilst there is a penalty on classification accuracy scores, promising speed-up gains can be achieved using MI techniques. Using MI with signal epochs (3secs) containing signal transitions enhances these speed-up gains. This work is exploratory and we suggest further research to be carried out for validation and development. Benefits to improving classification speed include improving application in clinical or educational settings.
Stimulus Set PSAP-C (fMRI paradigm)
Creators: name: Margerete Julia Sophie Schoett
name: Degen, Tom
name: Fischmann, Tamara
Publisher: name: Zenodo
Year: 2020
Subjects: stimulus set
experimental paradigm
attachment
middle childhood
fMRI

description: The Passive Separation-Anxiety-Projective for Children (PSAP-C) is a fMRI paradigm to investigate neural processing of attachment-relevant stimuli. Each item consists of combinations of a picture and an associated audio stimulus, and is assigned to an experimental (i.e., attachment) or a control condition, each consisting of 12 different stimuli. The attachment condition contains pictorial representations of a child’s separation from their primary caregiver, modelled after the Separation Anxiety Test (SAT; Hansburg, 1972) and the Adult Attachment Projective (AAP; Buchheim et al. 2003). The control condition depicts situations with no explicit dyadic relationships or affective cues. Associated audio stimuli consist of a recorded sentence describing the scene. The PSAP-C stimulus set contains 24 picture and respective sentences used for audio stimuli. The PSAP-C stimulus set (12 per condition) was tested in an independent behavioral pilot study (N = 20) for differences between conditions (Attachment vs. Control) regarding valence, arousal, and visual complexity on a 9-point Likert scale. Picture stimuli of the attachment condition were rated as more negative (M=4.12, SD=1.26) than pictures of the control condition (M=6.62, SD=.72) using the Self Assessment Manikin (SAM; Bradley & Lang, 1994; p < .001). Picture stimuli did differ marginally, but not statistically between conditions with respect to arousal (C: M=4.47, SD=.51; A: M=5.21, SD=1.22; p=.079) and subjectively rated visual complexity (C: M=2.88, SD=.76; A: M=3.70, SD=1.18; p=.053). Audio stimuli were not statistically different between conditions with respect to word-length (in letters; p = .6), word frequency (based on norms by Brysbaert et al., 2011; p = .25), or orthographic word familiarity (determined using the orthographic Levenstein distance following Yarkoni et al., 2008; p = .10)
description: {"references": ["Schoett, M., Basten, U., Deichmann, R., Fiebach, C.J.#, Fischmann, T.#, (in press) Brain responses to social cues of attachment in mid-childhood. Attachment and Human Development."]}
Isospectral Deformations in QFT: The Massive case
Creators: name: Much, Albert
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider isospectral deformations of quantum field theories by using the novel construction tool of warped convolutions. The deformation enables us to obtain a variety of models that are wedge-local and have nontrivial scattering matrices.
A Comparative Study of Multimodal Approaches to Learning: To Support Children’s Learning in the Early Years
Creators: name: Khanum, R.
name: Theodotou, Evgenia
Publisher: name: The School of Education and Communities, University of East London
Year: 2019

description: Multimodal approaches to teaching and learning within early years education support children’s diverse experiences and competencies. Within a multimodal process, different modes can communicate meaning in several ways. The Play and Learn through the Arts (PLA) programme and the Argyle project offer the opportunity to embrace the framework of a multimodal approach to children’s learning, though they have salient differences. This paper aims to explore the content of the PLA and the Argyle project as two practical examples which can be used to create a multimodal environment in early years settings. The discussion concludes with the significant contribution of the PLA programme to children’s learning using the arts as a teaching method through a child-led process within the multimodal framework; though the Argyle project presented the concept of multiliteracies which was also an important component for a multimodal environment. This paper can be useful to early years practitioners to explore different practical examples of children’s multimodal learning in everyday practice.
Convex billiards on convex spheres
Creators: name: Zhang, Pengfei
Publisher: name: arXiv
Year: 2015
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37C20, 37C29, 37D40

description: In this paper we study the dynamical billiards on a convex 2D sphere. We investigate some generic properties of the convex billiards on a general convex sphere. We prove that $C^\infty$ generically, every periodic point is either hyperbolic or elliptic with irrational rotation number. Moreover, every hyperbolic periodic point admits some transverse homoclinic intersections. A new ingredient in our approach is that we use Herman's result on Diophantine invariant curves to prove the nonlinear stability of elliptic periodic points for a dense subset of convex billiards.
description: 20 pages, 2 figures
Boiling Frogs: Pricing Strategies for a Manufacturer Adding a Direct Channel that Competes with the Traditional Channel
Creators: name: Swaminathan, Jayashankar
name: Heese, Hans Sebastian
name: Gilland, Wendell
name: Cattani, Kyle
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006

description: In this paper, we analyze a scenario where a manufacturer with a traditional channel partner (i.e., a retailer) opens up a direct Internet channel that is in competition with the traditional channel partner. We first consider that in order to mitigate channel conflict the manufacturer, who chooses wholesale prices as a Stackelberg leader, commits to setting a direct channel retail price that matches the retailer’s price in the traditional channel. Under this general equal-pricing strategy, we determine the effect of more specific pricing strategies on prices and profits of the manufacturer and the retailer. These specific strategies are: (1) keep wholesale prices as they were before, (2) keep retail prices as they were before, or (3) select wholesale and retail prices that optimize profits for the manufacturer. Within these strategies we identify and summarize cases when the resulting prices are lower than the pre-Internet prices, and when they are higher, relating them to the respective channel costs and to the relative convenience to the consumer of the Internet channel. We find that Strategy 3 – the specific equal-pricing strategy that optimizes profits for the manufacturer – often is also preferred by the retailer and customers (through lower prices) over the other equal-pricing strategies. We next consider the implications of the equal-pricing constraint through a numerical experiment that indicates that the equal-pricing strategy is appropriate as long as the Internet channel is significantly less convenient than the traditional channel. If the Internet channel is of comparable convenience to the traditional channel, then the manufacturer has tremendous incentive to abandon the equal-pricing policy – at great peril to the traditional retailer.
Early years education: are young students intrinsically or extrinsically motivated towards school activities? A discussion about the effects of rewards on young children’s learning
Creators: name: Theodotou, Evgenia
Publisher: name: University of East London, Cass School of Education and Communities
Year: 2014
Subjects: early years education
extrinsic motivation
intrinsive motivation
learning process
rewards

description: Rewards can reinforce and at the same time forestall young children’s willingness to learn. However, they are broadly used in the field of education, especially in early years settings, to stimulate children towards learning activities. This paper reviews the theoretical and research literature related to intrinsic and extrinsic motivational theory, with particular focus on the concept of rewards, discussing how this theoretical framework explains children’s learning and attitudes. It argues that rewards usually have a detrimental impact on young students’ learning and behaviour but in some cases can contribute beneficially to children’s willingness to learn.
Estimating the Impact of Understaffing on Sales and Profitability in Retail Stores
Creators: name: Kesavan, Saravanan
name: Mani, Vidya
name: Swaminathan, Jayashankar
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015

description: In this paper we use micro-level data on store traffic, sales and labor from 41 stores of a large retail chain to identify the extent of understaffing in retail stores and quantify its impact on sales and profitability. We show how traffic data can be leveraged in making staffing decisions through use of a structural model that captures the relationship between traffic, sales and labor. Assuming that store managers aim to maximize profits, we estimate the contribution of labor to sales and impute the cost of labor for each store in our sample. We find significant heterogeneity in the contribution of labor to sales as well as imputed cost of labor across these stores and across time. Using the estimated parameters, we establish the presence of systematic understaffing during peak hours. Aligning staffing levels with changing traffic patterns can result in a 6.15% savings in lost sales and a 5.74% improvement in profitability. We describe a pilot implementation of our approach at another large retailer where we identify periods of understaffing in their stores and document the impact on conversion rate and lost sales.
The LiLa Knowledge Base of Interlinked Linguistic Resources for Latin
Creators: name: Passarotti, Marco
name: Cecchini, Flavio Massimiliano
name: Franzini, Greta
name: Litta, Eleonora
name: Mambrini, Francesco
name: Ruffolo, Paolo
name: Sprugnoli, Rachele
name: Testori, Marinella
Publisher: name: Zenodo
Year: 2020
Subjects: Linguistic Linked Data
Latin
Linguistic Resources

description: Slides of the presentation of the LiLa project at the CLARIN Bazaar, CLARIN Annual Conference 2020, 7th October 2020.
Laser cooling for quantum gases
Creators: name: Schreck, Florian
name: van Druten, Klaasjan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Laser cooling exploits the physics of light scattering to cool atomic and molecular gases to close to absolute zero. It is the crucial initial step for essentially all atomic gas experiments in which Bose-Einstein condensation and, more generally, quantum degeneracy is reached. The ongoing development of laser-cooling methods has allowed more elements to be brought to quantum degeneracy, with each additional atomic species offering its own experimental opportunities. Improved methods are opening new avenues, for example, reaching Bose-Einstein condensation purely through laser cooling as well as the realization of continuous Bose-Einstein condensation. Here we review these recent innovations in laser cooling and provide an outlook on methods that may enable new ways of creating quantum gases.
description: 13 pages, 4 figures
Encouraging critical thinking and meaningful engagement in asynchronous discussion forums
Creators: name: Byrne, Fiona
Publisher: name: The School of Education and Communities, University of East London
Year: 2022

description: The aim of this project was to explore pedagogical strategies used to encourage meaningful engagement in asynchronous discussion forums on a distance learning module in a London-based university. The methodology employed was an active inquiry which involved implementing pedagogical interventions into my own practice. Data collection methods included interviews, reflective learning journals, and gathering data analytics on participation in discussion forums. Findings suggest the interventions have improved students' collaboration, participation, critical thinking and meaningful engagement. Students reflected that the forums provided a supportive environment which enabled them to reflect, ask questions, share insights and grasp complex concepts.
Electric dipole moments of nucleons, nuclei, and atoms: The Standard Model and beyond
Creators: name: Ramsey-Musolf, Michael
name: van Kolck, U.
name: Engel, Jonathan
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2013

description: Searches for the permanent electric dipole moments (EDMs) of molecules, atoms, nucleons and nuclei provide powerful probes of CP violation both within and beyond the Standard Model (BSM). The interpretation of experimental EDM limits requires careful delineation of physics at a wide range of distance scales, from the long-range atomic and molecular scales to the short-distance dynamics of physics at or beyond the Fermi scale. In this review, we provide a framework for disentangling contributions from physics at these disparate scales, building out from the set of dimension four and six effective operators that embody CP violation at the Fermi scale. We survey existing computations of hadronic and nuclear matrix elements associated with Fermi-scale CP violation in systems of experimental interest, and quantify the present level of theoretical uncertainty in these calculations. Using representative BSM scenarios of current interest, we illustrate how the interplay of physics at various scales generates EDMs at a potentially observable level.
Frozen reaction fronts in steady flows: a burning-invariant-manifold perspective
Creators: name: Mahoney, John R.
name: Li, John
name: Boyer, Carleen
name: Solomon, Tom
name: Mitchell, Kevin A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The dynamics of fronts, such as chemical reaction fronts, propagating in two-dimensional fluid flows can be remarkably rich and varied. For time-invariant flows, the front dynamics may simplify, settling in to a steady state in which the reacted domain is static, and the front appears "frozen". Our central result is that these frozen fronts in the two-dimensional fluid are composed of segments of burning invariant manifolds---invariant manifolds of front-element dynamics in $xyθ$-space, where $θ$ is the front orientation. Burning invariant manifolds (BIMs) have been identified previously as important local barriers to front propagation in fluid flows. The relevance of BIMs for frozen fronts rests in their ability, under appropriate conditions, to form global barriers, separating reacted domains from nonreacted domains for all time. The second main result of this paper is an understanding of bifurcations that lead from a nonfrozen state to a frozen state, as well as bifurcations that change the topological structure of the frozen front. Though the primary results of this study apply to general fluid flows, our analysis focuses on a chain of vortices in a channel flow with an imposed wind. For this system, we present both experimental and numerical studies that support the theoretical analysis developed here.
description: 21 pages, 30 figures