cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Variable Selection for Latent Class Analysis with Application to Low Back Pain Diagnosis
Creators: name: Fop, Michael
name: Smart, Keith
name: Murphy, Thomas Brendan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: Computation (stat.CO)
subject: FOS: Computer and information sciences
subject: 62H30

description: The identification of most relevant clinical criteria related to low back pain disorders may aid the evaluation of the nature of pain suffered in a way that usefully informs patient assessment and treatment. Data concerning low back pain can be of categorical nature, in the form of a check-list in which each item denotes presence or absence of a clinical condition. Latent class analysis is a model-based clustering method for multivariate categorical responses, which can be applied to such data for a preliminary diagnosis of the type of pain. In this work, we propose a variable selection method for latent class analysis applied to the selection of the most useful variables in detecting the group structure in the data. The method is based on the comparison of two different models and allows the discarding of those variables with no group information and those variables carrying the same information as the already selected ones. We consider a swap-stepwise algorithm where at each step the models are compared through an approximation to their Bayes factor. The method is applied to the selection of the clinical criteria most useful for the clustering of patients in different classes. It is shown to perform a parsimonious variable selection and to give a clustering performance comparable to the expert-based classification of patients into three classes of pain.
description: Published in The Annals of Applied Statistics by the Institute of Mathematical Statistics
Electromagnetic instability induced by neutrino interaction
Creators: name: Bhatt, Jitesh R.
name: George, Manu
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the generation and evolution of magnetic field in a primordial plasma at temperature T < 1 MeV in presence of asymmetric neutrino background i.e. the number densities of right- handed and left-handed neutrinos are not same. Semi-classical equations of motion of a charged fermion are derived using the effective low-energy Lagrangian. It is shown that the spin degree of freedom of the charged fermion couples with the neutrino background. Using this kinetic equation we study the collective modes of the plasma. We find that there exist an unstable mode. This instability is closely related with the instability induced by chiral-anomaly in high temperature T > 80 TeV plasma where right and left-handed electrons are out of equilibrium. We find that at the temperatures below the neutrino decoupling the instability can produce magnetic field of 10 Gauss in the Universe. We discuss cosmological implications of the results.
description: 6 pages, Typos corrected, equations corrected
Regional accents are OK for teaching but not too regional: A discussion of accent preference in British teaching
Creators: name: Baratta, Alex
Publisher: name: Zenodo
Year: 2023
Subjects: accent
teaching
accentism
class
professionalism

description: This chapter is based on the plenary talk given by the author at the 7th International Conference English Pronunciation: Issues and Practices (EPIP 7) held May 18–20, 2022 at Université Grenoble-Alpes, France.
Gauge symmetries and matter fields in F-theory models without section- compactifications on double cover and Fermat quartic K3 constructions times K3
Creators: name: Kimura, Yusuke
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate gauge theories and matter fields in F-theory compactifications on genus-one fibered Calabi-Yau 4-folds without a global section. In this study, genus-one fibered Calabi-Yau 4-folds are built as direct products of a genus-one fibered K3 surface that lacks a section times a K3 surface. We consider i) double covers of $\mathbb{P}^1\times\mathbb{P}^1$ ramified along a bidegree (4,4) curve, and ii) complete intersections of two bidegree (1,2) hypersurfaces in $\mathbb{P}^1\times\mathbb{P}^3$ to construct genus-one fibered K3 surfaces without a section. $E_7$ gauge group arises in some F-theory compactifications on double covers times K3. We show that the tadpole can be cancelled for an F-theory compactification on complete intersection K3 times K3, when complete intersection K3 is isomorphic to the Fermat quartic, and the complex structure of the other K3 surface in the direct product is appropriately chosen.
description: 23 pages, some clarifications, references updated
Mutation via Hovey twin cotorsion pairs and model structures in extriangulated categories
Creators: name: Nakaoka, Hiroyuki
name: Palu, Yann
Publisher: name: arXiv
Year: 2016
Subjects: subject: Category Theory (math.CT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We give a simultaneous generalization of exact categories and triangulated categories, which is suitable for considering cotorsion pairs, and which we call extriangulated categories. Extension-closed, full subcategories of triangulated categories are examples of extriangulated categories. We give a bijective correspondence between some pairs of cotorsion pairs which we call Hovey twin cotorsion pairs, and admissible model structures. As a consequence, these model structures relate certain localizations with certain ideal quotients, via the homotopy category which can be given a triangulated structure. This gives a natural framework to formulate reduction and mutation of cotorsion pairs, applicable to both exact categories and triangulated categories. These results can be thought of as arguments towards the view that extriangulated categories are a convenient setup for writing down proofs which apply to both exact categories and (extension-closed subcategories of) triangulated categories.
description: Some complementary results and comments added. 69 pages
Spatial fluctuations at vertices of epithelial layers: quantification of regulation by Rho pathway
Creators: name: Fodor, É.
name: Mehandia, V.
name: Comelles, J.
name: Thiagarajan, R.
name: Gov, N. S.
name: Visco, P.
name: van Wijland, F.
name: Riveline, D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In living matter, shape fluctuations induced by acto-myosin are usually studied in vitro via reconstituted gels, whose properties are controlled by changing the concentrations of actin, myosin and cross-linkers. Such an approach deliberately avoids to consider the complexity of biochemical signaling inherent to living systems. Acto-myosin activity inside living cells is mainly regulated by the Rho signaling pathway which is composed of multiple layers of coupled activators and inhibitors. We investigate how such a pathway controls the dynamics of confluent epithelial tissues by tracking the displacements of the junction points between cells. Using a phenomenological model to analyze the vertex fluctuations, we rationalize the effects of different Rho signaling targets on the emergent tissue activity by quantifying the effective diffusion coefficient, the persistence time and persistence length of the fluctuations. Our results reveal an unanticipated correlation between layers of activation/inhibition and spatial fluctuations within tissues. Overall, this work connects the regulation via biochemical signaling with mesoscopic spatial fluctuations, with potential application to the study of structural rearrangements in epithelial tissues.
description: 8 pages, 3 figures
Extended symmetry analysis of generalized Burgers equations
Creators: name: Pocheketa, Oleksandr A.
name: Popovych, Roman O.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 35A30 (Primary), 35C05, 35K59, 35K05 (Secondary)

description: Using advanced classification techniques, we carry out the extended symmetry analysis of the class of generalized Burgers equations of the form $u_t+uu_x+f(t,x)u_{xx}=0$. This enhances all the previous results on symmetries of these equations and includes the description of admissible transformations, Lie symmetries, Lie and nonclassical reductions, conservation laws, potential admissible transformations and potential symmetries. The study is based on the fact that the class is normalized, and its equivalence group is finite-dimensional.
description: 31 pages, 2 tables, minor corrections
Bulk Fermi-surface of the Weyl type-II semi-metallic candidate MoTe2
Creators: name: Rhodes, D.
name: Schönemann, R.
name: Aryal, N.
name: Zhou, Q.
name: Zhang, Q. R.
name: Kampert, E.
name: Chiu, Y. -C.
name: Lai, Y.
name: Shimura, Y.
name: McCandless, G. T.
name: Chan, J. Y.
name: Paley, D. W.
name: Lee, J.
name: Finke, A. D.
name: Ruff, J. P. C.
name: Das, S.
name: Manousakis, E.
name: Balicas, L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The electronic structure of WTe$_2$ and orthorhombic $γ-$MoTe$_2$, are claimed to contain pairs of Weyl type-II points. A series of ARPES experiments claim a broad agreement with these predictions. We synthesized single-crystals of MoTe$_2$ through a Te flux method to validate these predictions through measurements of its bulk Fermi surface (FS) \emph{via} quantum oscillatory phenomena. We find that the superconducting transition temperature of $γ-$MoTe$_2$ depends on disorder as quantified by the ratio between the room- and low-temperature resistivities, suggesting the possibility of an unconventional superconducting pairing symmetry. Similarly to WTe$_2$, the magnetoresistivity of $γ-$MoTe$_2$ does not saturate at high magnetic fields and can easily surpass $10^{6}$ \%. Remarkably, the analysis of the de Haas-van Alphen (dHvA) signal superimposed onto the magnetic torque, indicates that the geometry of its FS is markedly distinct from the calculated one. The dHvA signal also reveals that the FS is affected by the Zeeman-effect precluding the extraction of the Berry-phase. A direct comparison between the previous ARPES studies and density-functional-theory (DFT) calculations reveals a disagreement in the position of the valence bands relative to the Fermi level $\varepsilon_F$. Here, we show that a shift of the DFT valence bands relative to $\varepsilon_F$, in order to match the ARPES observations, and of the DFT electron bands to explain some of the observed dHvA frequencies, leads to a good agreement between the calculations and the angular dependence of the FS cross-sectional areas observed experimentally. However, this relative displacement between electron- and hole-bands eliminates their crossings and, therefore, the Weyl type-II points predicted for $γ-$MoTe$_2$.
description: 13 pages, 7 figures, supplementary file not included (in press)
The concordance invariant tau in link grid homology
Creators: name: Cavallo, Alberto
Publisher: name: arXiv
Year: 2015
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25, 57M27

description: We introduce a generalization of the Ozsváth-Szabó $τ$-invariant to links by studying a filtered version of link grid homology. We prove that this invariant remains unchanged under strong concordance and we show that it produces a lower bound for the slice genus of a link. We show that this bound is sharp for torus links and we also give an application to Legendrian link invariants in the standard contact 3-sphere.
Rare region induced avoided quantum criticality in disordered three-dimensional Dirac and Weyl semimetals
Creators: name: Pixley, J. H.
name: Huse, David A.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2016
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We numerically study the effect of short ranged potential disorder on massless noninteracting three-dimensional Dirac and Weyl fermions, with a focus on the question of the proposed quantum critical point separating the semimetal and diffusive metal phases. We determine the properties of the eigenstates of the disordered Dirac Hamiltonian ($H$) and exactly calculate the density of states (DOS) near zero energy, using a combination of Lanczos on $H^2$ and the kernel polynomial method on $H$. We establish the existence of two distinct types of low energy eigenstates contributing to the disordered density of states in the weak disorder semimetal regime. These are (i) typical eigenstates that are well described by linearly dispersing perturbatively dressed Dirac states, and (ii) nonperturbative rare eigenstates that are weakly-dispersive and quasi-localized in the real space regions with the largest (and rarest) local random potential. Using twisted boundary conditions, we are able to systematically find and study these two types of eigenstates. We find that the Dirac states contribute low energy peaks in the finite-size DOS that arise from the clean eigenstates which shift and broaden in the presence of disorder. On the other hand, we establish that the rare quasi-localized eigenstates contribute a nonzero background DOS which is only weakly energy-dependent near zero energy and is exponentially small at weak disorder. We find that the expected semimetal to diffusive metal quantum critical point is converted to an {\it avoided} quantum criticality that is "rounded out" by nonperturbative effects, with no signs of any singular behavior in the DOS near the Dirac energy. We discuss the implications of our results for disordered Dirac and Weyl semimetals, and reconcile the large body of existing numerical work showing quantum criticality with the existence of the rare region effects.
description: 20 pages, 19 figures, replaced with published version
Electro-absorption of silicene and bilayer graphene quantum dots
Creators: name: Abdelsalam, H.
name: Talaat, M. H.
name: Lukyanchuk, I.
name: Portnoi, M. E.
name: Saroka, V. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study numerically the optical properties of low-buckled silicene and AB-stacked bilayer graphene quantum dots subjected to an external electric field, which is normal to their surface. Within the tight-binding model, the optical absorption is calculated for quantum dots, of triangular and hexagonal shapes, with zigzag and armchair edge terminations. We show that in triangular silicene clusters with zigzag edges a rich and widely tunable infrared absorption peak structure originates from transitions involving zero energy states. The edge of absorption in silicene quantum dots undergoes red shift in the external electric field for triangular clusters, whereas blue shift takes place for hexagonal ones. In small clusters of bilayer graphene with zigzag edges the edge of absorption undergoes blue/red shift for triangular/hexagonal geometry. In armchair clusters of silicene blue shift of the absorption edge takes place for both cluster shapes, while red shift is inherent for both shapes of the bilayer graphene quantum dots.
description: 7 pages, 7 figures
Plane partitions with a "pit": generating functions and representation theory
Creators: name: Bershtein, M.
name: Feigin, B.
name: Merzon, G.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Combinatorics (math.CO)
subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We study plane partitions satisfying condition $a_{n+1,m+1}=0$ (this condition is called "pit") and asymptotic conditions along three coordinate axes. We find the formulas for generating function of such plane partitions. Such plane partitions label the basis vectors in certain representations of quantum toroidal $\mathfrak{gl}_1$ algebra, therefore our formulas can be interpreted as the characters of these representations. The resulting formulas resemble formulas for characters of tensor representations of Lie superalgebra $\mathfrak{gl}_{m|n}$. We discuss representation theoretic interpretation of our formulas using $q$-deformed $W$-algebra $\mathfrak{gl}_{m|n}$.
description: 30 pages, v2. 32 pages, new subsection 4.4 included, v3 36 pages, many corrections, references added, v4 38 pages many corrections, references added, version to appear in Sel. Math. New Ser. (2018)
Physical models for the normal YORP and diurnal Yarkovsky effects
Creators: name: Golubov, O.
name: Kravets, Y.
name: Krugly, Yu. N.
name: Scheeres, D. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We propose an analytic model for the normal YORP and diurnal Yarkovsky effects experienced by a convex asteroid. Both the YORP torque and the Yarkovsky force are expressed as integrals of a universal function over the surface of an asteroid. Although in general this function can only be calculated numerically from the solution of the heat conductivity equation, approximate solutions can be obtained in quadratures for important limiting cases. We consider 3 such simplified models: Rubincam's approximation (zero heat conductivity), low thermal inertia limit (including the next order correction and thus valid for small heat conductivity), and high thermal inertia limit (valid for large heat conductivity). All three simplified models are compared with the exact solution.
description: 14 pages, 8 figures
Flat rotation curves and low velocity dispersions in KMOS star-forming galaxies at z~1
Creators: name: Di Teodoro, E. M.
name: Fraternali, F.
name: Miller, S. H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The study of the evolution of star-forming galaxies requires the determination of accurate kinematics and scaling relations out to high redshift. In this paper we select a sample of 18 galaxies at z~1, observed in the H-alpha emission-line with KMOS, to derive accurate kinematics using a novel 3D analysis technique. We use the new code 3D-Barolo, that models the galaxy emission directly in the 3D observational space, without the need to extract kinematic maps. This technique's major advantage is that it is not affected by beam smearing and thus it enables the determination of rotation velocity and intrinsic velocity dispersion, even at low spatial resolution. We find that: 1) the rotation curves of these z~1 galaxies rise very steeply within few kiloparsecs and remain flat out to the outermost radius and 2) the H-alpha velocity dispersions are low, ranging from 15 to 40 km/s, which leads to V/sigma = 3-10. These characteristics are similar to those of disc galaxies in the local Universe. Finally, we also report no significant evolution of the stellar-mass Tully-Fisher relation. Our results show that disc galaxies are kinematically mature and rotation-dominated already at z~1.
description: Accepted for publication in A&A, 11 pages, 6 figures, 1 table
Propeller effect in two brightest transient X-ray pulsars: 4U 0115+63 and V 0332+53
Creators: name: Tsygankov, S. S.
name: Lutovinov, A. A.
name: Doroshenko, V.
name: Mushtukov, A. A.
name: Suleimanov, V.
name: Poutanen, J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the results of the monitoring programmes performed with the Swift/XRT telescope and aimed specifically to detect an abrupt decrease of the observed flux associated with a transition to the propeller regime in two well known X-ray pulsars 4U 0115+63 and V 0332+53 during their giant outbursts in 2015. Such transitions were detected at the threshold luminosities of $(1.4\pm0.4)\times10^{36}$ erg s$^{-1}$ and $(2.0\pm0.4)\times10^{36}$ erg s$^{-1}$ for 4U 0115+63 and V 0332+53, respectively. Spectra of the sources are shown to be significantly softer during the low state. In both sources, the accretion at rates close to the aforementioned threshold values briefly resumes during the periastron passage following the transition into propeller regime. The strength of the dipole component of the magnetic field required to inhibit the accretion agrees well with estimates based on the position of the cyclotron lines in their spectra, thus excluding presence of a strong multipole component of the magnetic field in the vicinity of the neutron star.
description: 7 pages, 4 figures, accepted by A&A
Subgiants and lower giants in the TESS Continuous Viewing Zones
Creators: name: Tayar, Jamie
name: Grusnis, Sophia
Publisher: name: Zenodo
Year: 2024

description: The Continuous Viewing Zones of TESS represent regions with years of precise, space-based photometry. In these regions, we have targeted the stars on the subgiant branch and lower giant branch, regions that were understudied by the Kepler Mission. We show that the TESS data are sufficient to measure asteroseismic parameters for more than 80 stars. We also show how these stars can be used to study TESS detection systematics, the quality of stellar evolution models in this regime, the evolution of the Galaxy with age, and the physics of internal angular momentum transport.
Discrete triangulated categories
Creators: name: Broomhead, Nathan
name: Pauksztello, David
name: Ploog, David
Publisher: name: arXiv
Year: 2015
Subjects: subject: Representation Theory (math.RT)
subject: Category Theory (math.CT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 18E30, 16G10, 16E35

description: We introduce and study several homological notions which generalise the discrete derived categories of D. Vossieck. As an application, we show that Vossieck discrete algebras have this property with respect to all bounded t-structures. We give many examples of triangulated categories regarding these notions.
description: 14 pages, 1 table, v2 minor fixes and changes, v3 final version after referee report
Unveiling causal activity of complex networks
Creators: name: Williams-Garcia, Rashid V.
name: Beggs, John M.
name: Ortiz, Gerardo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Biological Physics (physics.bio-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We introduce a novel tool for analyzing complex network dynamics, allowing for cascades of causally-related events, which we call causal webs (c-webs), to be separated from other non-causally-related events. This tool shows that traditionally-conceived avalanches may contain mixtures of spatially-distinct but temporally-overlapping cascades of events, and dynamical disorder or noise. In contrast, c-webs separate these components, unveiling previously hidden features of the network and dynamics. We apply our method to mouse cortical data with resulting statistics which demonstrate for the first time that neuronal avalanches are not merely composed of causally-related events.
Gender equality reports for ATHENA project partners
Creators: name: Holubová, Barbora
name: Bianchi, Gabriel
name: Žilinská, Miroslava
Publisher: name: Zenodo
Year: 2022
Subjects: gender equality
Research performing organization (RPO)
Research funding organization (RPO)

description: This report provides data and information collected within the WP2 of the project, namely the Task 2.1 Gender equality audit and assessment at the organisational level, the Task 2.2. Assessment of existing national provisions and the Task 2.3. Identification of existing gender bias at the organisational level (including Task 2.3.1. Staff survey on awareness of gender bias in RPOs and RFOs, Task 2.3.2. Storytelling interviews in RPOs and Task 2.3.3. Focus Groups). Under these tasks, the project partners carried out quantitative and qualitative gender audits and data collection in their organisations. It aimed to provide a solid basis for the development of gender equality plans in project partners´ organisations and will represent the basis to measure improvements at the end of the project. This report merges gender equality reports from partners which summarize the outcomes of WP2, including also recommendations for the development of the GEPs.
Genomic and Phenotypic Characterization of Epidemiologically Most Successful Haplotypes of the Fire-Blight Pathogen, Erwinia amylovora
Creators: name: Dreo, Tanja
name: Benčič, Aleksander
name: Pothier, Joel
Publisher: name: Zenodo
Year: 2023
Subjects: plant pathology;VNTR;population genetics

description: Fireblight, a disease of many plant species in the Rosaceae family, is caused by Erwinia amylovora (Ea). Epidemiologically, colonization and infection of blossoms is a crucial stage of the disease. Analysis of the phylogeography and population structure of the species based on minisatellites confirmed presence of high number of diverse haplotypes but also high representation of certain haplotypes during outbreaks (Bühlmann et al., 2014). Experimental data was re-evaluated on occurance and frequency of haplotypes among 700+ Erwinia amylovora isolated from 2002 to 2009 from naturally occurring infections in Slovenia. The re-analysis represents a groundwork for selection of isolates to be included in further studies with the aim to ellucidate the basis of both epidemiologically successfull and unscuccessful haplotypes Ea. Whole genome sequencing, as well as phenotypic characterization of the selected isolates is underway.
description: {"references": ["B\u00fchlmann, A. et al. Phylogeography and population structure of the biologically invasive phytopathogen Erwinia amylovora inferred using minisatellites. Environ Microbiol 16, 2112\u20132125 (2014)", "Francisco, A. P., Bugalho, M., Ramirez, M. & Carri\u00e7o, J. A. Global optimal eBURST analysis of multilocus typing data using a graphic matroid approach. BMC Bioinformatics 10, 152 (2009)."]}
The sphere packing problem in dimension 24
Creators: name: Cohn, Henry
name: Kumar, Abhinav
name: Miller, Stephen D.
name: Radchenko, Danylo
name: Viazovska, Maryna
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: Building on Viazovska's recent solution of the sphere packing problem in eight dimensions, we prove that the Leech lattice is the densest packing of congruent spheres in twenty-four dimensions and that it is the unique optimal periodic packing. In particular, we find an optimal auxiliary function for the linear programming bounds, which is an analogue of Viazovska's function for the eight-dimensional case.
description: 17 pages
IoTWQPM
Creators: name: Shete, Rupali P
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Engineering

description: We have designed a prototype for Aquaculture termed as “IoTWQPM”. This is helpful for aqua farmers to increase fish productivity by monitoring water parameters of aqua pond in realtime. Data collected from sensors such as dissolved oxygen, pH and temperature will be useful for building machine learning model to predict water quality parameters.
Fluctuation analysis in nonstationary conditions: single Ca channel current in cortical pyramidal neurons
Creators: name: Scheppach, Christian
name: Robinson, Hugh P. C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: Fluctuation analysis is a method which allows measurement of the single channel current of ion channels even when it is too small to be resolved directly with the patch clamp technique. This is the case for voltage-gated Ca2+ channels (VGCCs). They are present in all mammalian central neurons, controlling presynaptic release of transmitter, postsynaptic signaling and synaptic integration. The amplitudes of their single channel currents in a physiological concentration of extracellular Ca2+, however, are small and not well determined. But measurement of this quantity is essential for estimating numbers of functional VGCCs in the membrane and the size of channel-associated Ca2+ signaling domains, and for understanding the stochastic nature of Ca2+ signaling. Here, we recorded the VGCC current in nucleated patches from layer 5 pyramidal neurons in rat neocortex, in physiological external Ca2+ (1-2 mM). The ensemble-averaging of current responses required for conventional fluctuation analysis proved impractical because of the rapid rundown of VGCC currents. We therefore developed a more robust method, using mean current fitting of individual current responses and band-pass filtering. Furthermore, voltage ramp stimulation proved useful. We validated the accuracy of the method by analyzing simulated data. At an external Ca2+ concentration of 1 mM, and a membrane potential of -20 mV, we found that the average single channel current amplitude was about 0.04 pA, increasing to 0.065 pA at 2 mM external Ca2+, and 0.12 pA at 5 mM. The relaxation time constant of the fluctuations was in the range 0.2-0.8 ms. The results are relevant to understanding the stochastic properties of dendritic Ca2+ spikes in neocortical layer 5 pyramidal neurons. With the reported method, single channel current amplitude of native VGCCs can be resolved accurately despite conditions of unstable rundown.
Stability results for Gabor frames and the p-order hold models
Creators: name: De Carli, Laura
name: Vellucci, Pierluigi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We prove stability results for a class of Gabor frames in $ L^2(\R)$. We consider window functions in the Sobolev spaces $H^1_0(\R)$ and B-splines of order $p\ge 1$. Our results can be used to describe the effect of the timing jitters in the $p$-order hold models of signal reconstruction.
On topological actions of finite, non-standard groups on spheres
Creators: name: Zimmermann, Bruno P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: The standard actions of finite groups on spheres S^d are linear actions, i.e. by finite subgroups of the orthogonal group O(d+1). We prove that, in each dimension d>5, there is a finite group G which admits a faithful, topological action on a sphere S^d but is not isomorphic to a subgroup of O(d+1). The situation remains open for smooth actions.
description: revised version, to appear in Monatsh. Math
From research to teaching: The case of English rising contours
Creators: name: Herment, Sophie
Publisher: name: Zenodo
Year: 2023
Subjects: EFL
English rising contours
melodic forms
discursive functions
visualisation

description: This chapter is based on the plenary talk given by the author at the 7th International Conference English Pronunciation: Issues and Practices (EPIP 7) held May 18–20, 2022 at Université Grenoble-Alpes, France.
An exploration of situated cognition in sport coaching using three contrasting methodological approaches
Creators: name: Quick, Simon
Publisher: name: Leeds Beckett University
Year: 2023
Subjects: Uncategorized

description: Sport coaching has been described as a dynamic, complex and at times, messy, activity that occurs in specific social contexts (Abraham & Collins, 1998; Bowes & Jones, 2006; Cushion, 2007; Jones & Wallace, 2005; Lyle, 2018). Existing research that explores coaching cognitions is, to date, limited in capturing, acknowledging and making sense of the rich socio-cultural backdrop in which coaches mentally operate and practice. The aim of this research is to explore situated coaching cognitions, notably the how (style) and what (content) of coaches’ thinking, whilst explicitly capturing the environmental constraints and affordances of the layered contextual environment in which coaching is situated. As part of a complex research design, three contrasting methodological approaches have been used. These gradually progress towards an embedded and highly-contextualised research setting. The research adopts the situated cognition paradigm and consists of three self-contained but connected studies that describe, conceptually refine, and situate cognitions within a rich coaching context. In study 1, a modified Applied Cognitive Task Analysis, along with stimulated recall, was used to reveal coaching tasks and a framework of higher psychological functions (types of thinking in which specific cognitions can be grouped). In study 2, coaching cognitions in a micro-management setting were examined using Think Aloud Protocol. It found that coaches engage strategies to overcome difficulties caused by their environment. However, the findings suggest that as coaching becomes more time-dependent, the influence and strength of wider contextual factors diminishes and therefore, coaches are unable to contextualise and reason whilst practising in complex environmental conditions. Study 3 engaged with the findings from the previous studies and drew upon the ERE model (North, 2017) to inform an ethnographic approach, which identified and examined situated cognitions in a researcher-embedded setting. As part of this study, the socio-cultural layers and stakeholder goals were explicitly captured in order to offer a refined and more sophisticated perspective of situated cognitions. The findings reveal that cognition is highly dependent upon, and influenced by, practical constraints and the social context in which it manifests. Themes such as goals, stakeholders and history help academics and coaches to understand better the challenging and intricately-balanced setting in which coaches mentally operate and practice. Consequently, this body of work recommends that future in situ research should explicitly consider the broader context, domain, and coaching purpose as ‘cornerstones’ upon which to explore cognitions.
title: Dispatchers' Perceptions of Computer-Aided Dispatch (CAD) in Police Communications Operations: An Exploratory Study
Creators: name: Luckman, Anthony L.
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 1997

description: Since the 1970s, law enforcement officials, policy makers and academics have promoted the use of computer-aided dispatch (CAD) as a way of improving both the efficiency and effectiveness of police operations. Past literature on CAD focused on the technology's assumed capabilities for meeting certain goals. However, little if any research has, either objectively or subjectively, tested CAD's ability to meet these goals. This study utilizes subjective data collected from both dispatchers currently using CAD and those who are awaiting its implementation to determine their perceptions of CAD's ability to meet some of these goals. Of primary interest here was CAD' s ability to: I) increase the efficiency and effectiveness of dispatch operations; 2) decrease problems with radio overlapping; 3) improve the overall dispatching procedure; and 4) match the assumptions of CAD's capabilities made in the literature.
High-Performance and Configurable SW/HW Co-design of Post-Quantum Signature CRYSTALS-Dilithium
Creators: name: Mao, Gaoyu
name: Chen, Donglong
name: Li, Guangyan
name: Dai, Wangchen
name: Sanka, Abdurrashid Ibrahim
name: Koç, Çetin Kaya
name: Cheung, Ray C. C.
Publisher: name: Zenodo
Year: 2022
Subjects: Post-Quantum Cryptography
Lattice-based cryptography
Digital signature
CRYSTALS-Dilithium
Software-hardware co-design

description: This repository is for our paper "High-Performance and Configurable SW/HW Co-design of Post-Quantum Signature CRYSTALS-Dilithium (https://dl.acm.org/doi/10.1145/3569456)" published in ACM Transactions on Reconfigurable Technology and Systems (TRETS). It hosts a hardware accelerator for the post-quantum signature scheme [CRYSTALS-Dilithium](https://pq-crystals.org/dilithium/), including: - a hybrid NTT/INTT module for polynomial multiplication.
 - a point-wise multiplication module.
 - a point-wise addition module.
 - a PRNG module with an SHA-3 core and a unified sampler. This repository provides a software/hardware co-design evaluation of CRYSTALS-Dilithium based on the Xilinx Zynq architecture.
Two-band model and RVB-type states: application to Kondo lattices, pyrochlores and Mn-based systems
Creators: name: Irkhin, V. Yu.
name: Skryabin, Yu. N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: An exotic fractionalized Fermi-liquid FL$^*$ theory of metallic systems, which combines resonant-valence-bond (RVB) state and the band of current carriers, is treated. An application of this theory to spin-liquid, antiferromagnetic and nearly antiferromagnetic systems is proposed with the use of various bosonic and fermionic representations, a comparison with perturbation theory in the $s-d(f)$ exchange model being performed. The topological aspects including formation of the small Fermi surface are treated. In the case of narrow bands (strong correlations), the ground state is considered as a direct product of RVB and dopon or Weng's fermion states. Examples of Kondo lattices, doped pyrochlores, and metallic $β$-Mn, YMn$_2$, Y$_{1-x}$Sc$_x$Mn$_2$ systems are discussed, analogies with copper-oxide systems being treated.
description: 5 pages
Convergence Analysis of Classes of Asymmetric Networks of Cucker-Smale Type with Deterministic Perturbations
Creators: name: Somarakis, Christoforos
name: Paraskevas, Evripidis
name: Baras, John S.
name: Motee, Nader
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: We introduce and discuss two nonlinear perturbed extensions of the Cucker-Smale model with asymmetric coupling weights. The first model assumes a finite collection of autonomous agents aiming to perform a consensus process in the presence of identical internal dynamics. The second model describes a similar population of agents that perform velocity alignment with the restriction of collision-free orbits. Although qualitatively different, we explain how these two non-trivial types of perturbations are analyzed under a unified framework. Rigorous analysis is conducted towards establishing new sufficient conditions for asymptotic flocking to a synchronized motion. Applications of our results are compared with simulations to illustrate the effectiveness of our theoretical estimates.
description: 16 pages, extended version of IEEE MED 2016 submitted to IEEE TCNS
The Classification of Real Singularities Using Singular. Part III: Unimodal Singularities of Corank 2
Creators: name: Boehm, Janko
name: Marais, Magdaleen S.
name: Steenpass, Andreas
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 14Qxx, 14Pxx

description: We present a classification algorithm for isolated hypersurface singularities of corank 2 and modality 1 over the real numbers. For a singularity given by a polynomial over the rationals, the algorithm determines its right equivalence class by specifying all representatives in Arnold's list of normal forms (Arnold et al. 1985) belonging to this class, and the corresponding values of the moduli parameter. We discuss how to computationally realize the individual steps of the algorithm for all singularities in consideration, and give explicit examples. The algorithm is implemented in the Singular library realclassify.lib.
description: 31 pages, 5 figures, 1 table, improvements in the algorithms
Psychosocial Challenges at a Refugee Camp: When Volunteer Preparation is Lacking
Creators: name: McBrien, J. L.
Publisher: name: Living Refugee Archive, University of East London
Year: 2023

description: This small-scale study was undertaken to learn about training for volunteers participating in a particular nongovernmental organization (NGO) program to help refugees living at a camp in Greece. There is a dearth of research on this topic in spite of the fact that organizations rely heavily on the support of volunteers. The design was that of a pilot case study. It was conducted using observations and interviews of volunteers at the NGO. Findings indicated that volunteers were poorly trained, as the NGO staff had insufficient knowledge about refugees in general, and the refugee population at the camp, in particular. The lack of training resulted in high levels of frustration for the camp residents as well as poor morale and sadness on the part of the volunteers. There are relatively easy solutions for better preparing volunteers to support refugees in transitional camps, including pre-arrival and on-site mentoring on the culture, history, and languages of the predominant camp residents as well as clear instructions on procedures and careful oversight by NGO staff, all of which would result in improved wellbeing for both refugees and volunteers.
The precision of parameter estimation for dephasing model under squeezed reservoir
Creators: name: Wu, Shao-xiong
name: Yu, Chang-shui
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the precision of parameter estimation for dephasing model under squeezed environment. We analytically calculate the dephasing factor $γ(t)$ and obtain the analytic quantum Fisher information (QFI) for the amplitude parameter $α$ and the phase parameter $ϕ$. It is shown that the QFI for the amplitude parameter $α$ is invariant in the whole process, while the QFI for the phase parameter $ϕ$ strongly depends on the reservoir squeezing. It is shown that the QFI can be enhanced for appropriate squeeze parameters $r$ and $θ$. Finally, we also investigate the effect of temperature on the QFI.
Energy, land-use and greenhouse gas emissions trajectories under a green growth paradigm
Creators: name: Van Vuuren, Detlef P.
name: Stehfest, Elke
name: Gernaat, David E.H.J.
name: Doelman, Jonathan C.
name: Van Den Berg, Maarten
name: Harmsen, Mathijs
name: De Boer, Harmen Sytze
name: Bouwman, Lex F.
name: Daioglou, Vassilis
name: Edelenbosch, Oreane Y.
name: Girod, Bastien
name: Kram, Tom
name: Lassaletta, Luis
name: Lucas, Paul L.
name: Van Meijl, Hans
name: Müller, Christoph
name: Van Ruijven, Bas J.
name: Van Der Sluis, Sietske
name: Tabeau, Andrzej
Publisher: name: Amsterdam : Elsevier
Year: 2016
Subjects: subject: Climate change research
subject: Integrated assessment
subject: Scenarios
subject: Shared Socio-economic Pathways (SSPs)
subject: Sustainable development
subject: 570
subject: 333.7
subject: 550

description: This paper describes the possible developments in global energy use and production, land use, emissions and climate changes following the SSP1 storyline, a development consistent with the green growth (or sustainable development) paradigm (a more inclusive development respecting environmental boundaries). The results are based on the implementation using the IMAGE 3.0 integrated assessment model and are compared with a) other IMAGE implementations of the SSPs (SSP2 and SSP3) and b) the SSP1 implementation of other integrated assessment models. The results show that a combination of resource efficiency, preferences for sustainable production methods and investment in human development could lead to a strong transition towards a more renewable energy supply, less land use and lower anthropogenic greenhouse gas emissions in 2100 than in 2010, even in the absence of explicit climate policies. At the same time, climate policy would still be needed to reduce emissions further, in order to reduce the projected increase of global mean temperature from 3 °C (SSP1 reference scenario) to 2 or 1.5 °C (in line with current policy targets). The SSP1 storyline could be a basis for further discussions on how climate policy can be combined with achieving other societal goals.
Thermal QRPA with Skyrme interactions and supernova neutral-current neutrino-nucleus reactions
Creators: name: Dzhioev, Alan A.
name: Vdovin, A. I.
name: Martínez-Pinedo, G.
name: Wambach, J.
name: Stoyanov, Ch.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Thermal Quasiparticle Random-Phase Approximation is combined with the Skyrme energy density functional method (Skyrme-TQRPA) to study the response of a hot nucleus to an external perturbation. For the sample nuclei, $^{56}$Fe and $^{82}$Ge, the Skyrme-TQRPA is applied to analyze thermal effects on the strength function of charge-neutral Gamow-Teller transitions which dominate neutrino-nucleus reactions at $E_ν\lesssim 20$~MeV. For the relevant supernova temperatures we calculate the cross sections for inelastic neutrino scattering. We also apply the method to examine the rate of neutrino-antineutrino pair emission by hot nuclei. The cross sections and rates are compared with those obtained earlier from the TQRPA calculations based on the phenomenological Quasiparticle-Phonon Model Hamiltonian. For inelastic neutrino scattering on $^{56}$Fe we also compare the Skyrme-TQRPA results to those obtained earlier from a hybrid approach that combines shell-model and RPA calculations.
description: Minor revisions according to referee's recomendations
Ginseng for the treatment and prevention of seasonal acute upper respiratory infections: a systematic review and meta-analysis.
Creators: name: Antonelli, Michele
name: Donelli, Davide
name: Firenzuoli, Fabio
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Infectious Disease
subject: Preventive Medicine
subject: Integrative Medicine
subject: Medicine and Health Sciences
subject: Primary Care
subject: Medical Specialties
subject: Cold
subject: Efficacy
subject: Flu
subject: Ginseng
subject: Meta-analysis
subject: Prevention
subject: Seasonal respiratory infections
subject: Systematic review

description: Ginseng is a traditional herbal medicine often used as a complementary therapy to boost the immune system against infections. The main ginseng species used in clinical practice are Korean ginseng (Panax ginseng), American ginseng (Panax quinquefolius), and Chinese ginseng (Panax notoginseng). The aim of the review is to assess whether ginseng can be a useful integrative supplementation for the treatment or prevention of seasonal acute upper respiratory infections (SAURIs).