cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Carrier Mobility and High-Field Velocity in 2D Transition Metal Dichalcogenides: Degeneracy and Screening
Creators: name: Iglesias, Jose Manuel
name: Nardone, Alejandra
name: Rengel, Raul
name: Kalna, Karol
name: Martin, Maria J.
name: Pascual, Elena
Publisher: name: arXiv
Year: 2024
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effect of degeneracy and the impact of free-carrier screening on a low-field mobility and a high-field drift velocity in MoS2 and WS2 are explored using an in-house ensemble Monte Carlo simulator. Electron low field mobility increases to 8400 cm2/Vs for MoS2 and to 12040 cm2/Vs for WS2 when temperature decreases to 77 K and carrier concentration is around 5e12 cm-2. In the case of holes, best mobility values were 9320 cm2/Vs and 13290 cm2 per Vs, reached at 77 K, while at room temperature these fall to 80 cm2/Vs and 150 cm2/Vs for MoS2 and WS2, respectively. The carrier screening effect plays a major role at low fields, and low and intermediate temperatures, where a combination of large occupancy of primary valleys and carrier-phonon interactions dominated by relatively low energy exchange processes results in an enhanced screening of intrinsic scattering. For electrons, degeneracy yields to transport in secondary valleys, which plays an important role in the decrease of the low field mobility at high concentrations and/or at room temperature. The high-field drift velocity is not much affected by carrier screening because of an increased carrier scattering with surface optical polar phonons, favouring larger phonon wavevector interactions with small dielectric function values.
description: 10 pages, 5 figures. Published in 2D Materials, 14, 025011 (2023)
Multipartite Entanglement and Hyperdeterminants
Creators: name: Miyake, Akimasa
name: Wadati, Miki
Publisher: name: arXiv
Year: 2002
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We classify multipartite entanglement in a unified manner, focusing on a duality between the set of separable states and that of entangled states. Hyperdeterminants, derived from the duality, are natural generalizations of entanglement measures, the concurrence, 3-tangle for 2, 3 qubits respectively. Our approach reveals how inequivalent multipartite entangled classes of pure states constitute a partially ordered structure under local actions, significantly different from a totally ordered one in the bipartite case. Moreover, the generic entangled class of the maximal dimension, given by the nonzero hyperdeterminant, does not include the maximally entangled states in Bell's inequalities in general (e.g., in the 4 or more qubits), contrary to the widely known bipartite or 3-qubit cases. It suggests that not only are they never locally interconvertible with the majority of multipartite entangled states, but they would have no grounds for the canonical n-partite entangled states. Our classification is also useful for that of mixed states.
description: 12 pages, 5 eps figures. Contribution to the ERATO workshop on Quantum Information Science 2002 (September, 2002, Tokyo, Japan). Our idea is sketched in Section 1 for convenience
An Extreme-mass Ratio, Short-period Eclipsing Binary Consisting of a B Dwarf Primary and a Pre-main Sequence M Star Companion Discovered by KELT
Creators: name: Stevens, Daniel J.
name: Zhou, George
name: Johnson, Marshall C.
name: Rizzuto, Aaron C.
name: Rodriguez, Joseph E.
name: Bieryla, Allyson
name: Villanueva,, Steven
name: Wright, Jason T.
name: Gaudi, B. Scott
name: Latham, David W.
name: Beatty, Thomas G.
name: Lund, Michael B.
name: Siverd, Robert J.
name: Kraus, Adam L.
name: Berlind, Perry
name: Calkins, Michael L.
name: Esquerdo, Gilbert A.
name: Kuhn, Rudolf B.
name: Pepper, Joshua
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present the discovery of \thisstar\ (HD 58730), a very low mass ratio ($q \equiv M_2/M_1 \approx 0.07$) eclipsing binary (EB) identified by the Kilodegree Extremely Little Telescope (KELT) survey. We present the discovery light curve and perform a global analysis of four high-precision ground-based light curves, the Transiting Exoplanets Survey Satellite (TESS) light curve, radial velocity (RV) measurements, Doppler Tomography (DT) measurements, and the broad-band spectral energy distribution (SED). Results from the global analysis are consistent with a fully convective ($M_2 = 0.22 \pm 0.02\ M_{\odot})$ M star transiting a late-B primary ($M_1 = 3.34^{+0.07}_{-0.09}\ M_{\odot};\ T_{\rm eff,1} = 11960^{+430}_{-520}\ {\rm K}$). We infer that the primary star is $183_{-30}^{+33}$ Myr old and that the companion star's radius is inflated by $26 \pm 8\%$ relative to the predicted value from a low-mass isochrone of similar age. We separately and analytically fit for the variability in the out-of-eclipse TESS phase curve, finding good agreement between the resulting stellar parameters and those from the global fit. Such systems are valuable for testing theories of binary star formation and understanding how the environment of a star in a close-but-detached binary affects its physical properties. In particular, we examine how a star's properties in such a binary might differ from the properties it would have in isolation.
description: 19 pages, 12 figures, accepted to MNRAS
title: 03_0801
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Chow's Theorem for Linear Spaces
Creators: name: Havlicek, Hans
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 51A10

description: If $ϕ: L\to L'$ is a bijection from the set of lines of a linear space $(P,L)$ onto the set of lines of a linear space $(P',L')$ ($\dim P, \dim P'\geq 3$), such that intersecting lines go over to intersecting lines in both directions, then $ϕ$ is arising from a collineation of $(P,L)$ onto $(P',L')$ or a collineation of $(P,L)$ onto the dual linear space of $(P',L')$. However, the second possibility can only occur when $(P,L)$ and $(P',L')$ are 3-dimensional generalized projective spaces.
Additional file 16: of Erratum to: Host lifestyle affects human microbiota on daily timescales
Creators: name: David, Lawrence
name: Materna, Arne
name: Friedman, Jonathan
name: Baptista, Maria
name: Blackburn, Matthew
name: Perrotta, Allison
name: Erdman, Susan
name: Alm, Eric
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Neuroscience
subject: Evolutionary Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Hierarchical clustering of detrended OTUs. Matrices show pairwise Spearman correlations between detrended OTU time series. Red points correspond with OTU pairs sharing more positive correlations, and blue points correspond with OTU pairs sharing more negative pairwise correlations. We used correlation matrices to perform hierarchical clustering. Clustered OTUs are segregated on this hierarchy by line color. Clustering yielded 138, 90, and 46 OTU clusters for Subject Aâ s gut, Subject Bâ s gut, and Subject Aâ s saliva time series, respectively. These clusters were ultimately tested against host factors to detect microbiota-lifestyle interactions (Table 1). (PDF 1027 kb)
Does pre-defined flexibility come with teh cost of higher credit risk? Evidence from agricultural micro lending in Madagascar
Creators: name: Weber, Ron
name: Musshoff, Oliver
name: Weber, Ron
name: Musshoff, Oliver
Publisher: name: Unknown
Year: 2015
Subjects: Agribusiness
Financial Economics
International Development

description: Using a unique dataset from a commercial microfinance institution in Madagascar, this paper investigates how the provision of microfinance loans with (in)flexible repayment schedules affects loan delinquencies of agricultural borrowers. We estimate different repayment functions to compare loan delinquencies of agricultural and non-agricultural borrowers and apply a quasi-experimental approach to investigate whether introducing flexible repayment schedules affects loan delinquencies of seasonal agricultural borrowers. In this attempt, three different delinquency categories reflecting different levels of credit risk are assessed. Our results reveal that loan delinquencies of non-seasonal agricultural borrowers without grace periods are not significantly different from those of non-farmers. Furthermore, we find that seasonal agricultural borrowers with grace periods show significantly higher delinquencies than non-farmers. Within the group of agricultural borrowers we find that introducing grace periods increases delinquency levels only in the lowest delinquency category, while we find no significant effect in the higher delinquency categories.
Additional file 1 of What are the factors influencing the aversion of students towards reptiles?
Creators: name: Moacyr Xavier Gomes Da Silva
name: Franciany Braga-Pereira
name: Da Silva, Mikaela Clotilde
name: De Oliveira, José Valberto
name: De Faria Lopes, Sérgio
name: Rômulo Romeu Nóbrega Alves
Publisher: name: figshare
Year: 2021
Subjects: subject: Neuroscience
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Science Policy

description: Additional file 1. (Form provided to verify the influence of practical exposure on the attitudes directed towards reptiles).
Probing Primordial Stochastic Gravitational Wave Background with Multi-band Astrophysical Foreground Cleaning
Creators: name: Pan, Zhen
name: Yang, Huan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The primordial stochastic gravitational wave background (SGWB) carries first-hand messages of early-universe physics, possibly including effects from inflation, preheating, cosmic strings, electroweak symmetry breaking, and etc. However, the astrophysical foreground from compact binaries may mask the SGWB, introducing difficulties in detecting the signal and measuring it accurately. In this paper, we propose a foreground cleaning method taking advantage of gravitational wave observations in other frequency bands. We apply this method to probing the SGWB with space-borne gravitational wave detectors, such as the laser interferometer space antenna (LISA). We find that the spectral density of the LISA-band astrophysical foreground from compact binaries (black holes and neutron stars) can be predicted with percent-level accuracy assuming 10-years' observations of third-generation GW detectors, e.g., cosmic explorer. While this multi-band method does not apply to binary white dwarfs (BWDs) which usually merger before entering the frequency band of ground-based detectors, we limit our foreground cleaning to frequency higher than $\sim5$ mHz, where all galactic BWDs can be individually resolved by LISA and the shape of the spectral density of the foreground from extragalactic BWDs can be reconstructed and/or modeled with certain uncertainties. After the foreground cleaning, LISA's sensitivity to the primordial SGWB will be substantially improved for either two LISA constellations where SGWB can be measured by cross correlating their outputs or only one constellation with three spacecrafts where SGWB can be measured by contrasting the responses of a signal channel and a null channel.
Finiteness Results for Hilbert's Irreducibility Theorem
Creators: name: Müller, Peter
Publisher: name: arXiv
Year: 2001
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Let f(t,X) be an irreducible polynomial over the field of rational functions k(t), where k is a number field. Let O be the ring of integers of k. Hilbert's irreducibility theorem gives infinitely many integral specializations of t to values a in O such that f(a,X) is still irreducible. In this paper we study the set Red(O) of those a in O with f(a,X) reducible. We show that Red(O) is a finite set under rather weak assumptions. In particular, several results of K. Langmann, obtained by Diophantine approximation techniques, appear as special cases of some of our results. Our method is completely different. We use elementary group theory, valuation theory, and Siegel's theorem about integral points on algebraic curves. Indeed, using the Siegel-Lang extension of Siegel's theorem, most of our results hold over more general fields.
The Veronese Surface in PG(5,3) and Witt's 5-$(12,6,1$ Design
Creators: name: Havlicek, Hans
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 51E20

description: A conic of the Veronese surface in PG(5,3) is a quadrangle. If one such quadrangle is replaced with its diagonal triangle, then one obtains a point model $K$ for Witt's 5-$(12,6,1)$ design, the blocks being the hyperplane sections containing more than three (actually six) points of $K$. As such a point model is projectively unique, the present construction yields an easy coordinate-free approach to some results obtained independently by H.S.M. Coxeter and G. Pellegrino, including a projective representation of the Mathieu group $M_{12}$ in PG(5,3).
description: Research supported by the Austrian FWF, project P12353--MAT
Additional file 17: of Erratum to: Host lifestyle affects human microbiota on daily timescales
Creators: name: David, Lawrence
name: Materna, Arne
name: Friedman, Jonathan
name: Baptista, Maria
name: Blackburn, Matthew
name: Perrotta, Allison
name: Erdman, Susan
name: Alm, Eric
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Neuroscience
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Hierarchical clustering of OTUs across disturbances. Matrices show pairwise Spearman correlations between OTUs tracked before and after Subject Aâ s prolonged travel abroad or Subject Bâ s acute enteric infection. Red points correspond with OTU pairs sharing more positive correlations, and blue points correspond with OTU pairs sharing more negative pairwise correlations. We used correlation matrices to perform hierarchical clustering. Clustered OTUs are segregated on this hierarchy by line color. Clustering yielded 11 OTU clusters for both time series. Clusters here were used to analyze subjectsâ gut microbiota response to large perturbations (Figures 3 and 4). (PDF 320 kb)
Extreme X-ray variability in the luminous quasar PDS 456
Creators: name: Reeves, J.
name: Wynn, G.
name: O'Brien, P.
name: Pounds, K.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present evidence from Beppo-SAX and XMM-Newton of extreme X-ray variability in the high luminosity radio-quiet quasar PDS 456, the most luminous known AGN at z<0.3. Repeated X-ray flaring is found in PDS 456, over the duration of the 340 ksec long Beppo-SAX observation. The X-ray flux doubles in just 30 ksec, whilst the total energy output of the flaring events is as high as 10^51 erg. Under the assumption of isotropic emission at the Eddington limit, this implies that the size of the X-ray emitting region in PDS 456 is less than 3 Schwarzschild radii, for a 10^9 solar mass black hole. From the rates of change of luminosity observed during the X-ray flares, we calculate lower limits for the radiative efficiency between 0.06 and 0.41, implying that accretion onto a Kerr black hole is likely in PDS 456. We suggest that the rapid variability is from X-ray flares produced through magnetic reconnection above the disc and calculate that the energetics and timescale of the flares are plausible if the quasar is accreting near to the maximum Eddington rate. A similar mechanism may account for the extreme rapid X-ray variability observed in many Narrow Line Seyfert 1s. In the case of PDS 456, we show that the X-ray flaring could be reproduced through a self-induced cascade of about 1000 individual flares over a timescale of the order 1 day.
description: 5 pages. Accepted for publication in MNRAS Letters
Additional file 2 of Effectiveness of matching human leukocyte antigens (HLA) in corneal transplantation: a systematic review protocol
Creators: name: Gagandeep Singh Sachdeva
name: Cabada, Joshua Piollo
name: Karim, Syed Saad
name: Kahandawa, Dmitry Lakvin
name: Thomas, Kevin Anil
name: Anusha Kumar
name: Barry, Robert J.
name: Gibran Farook Butt
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy

description: Additional file 2. Ovid Embase sample search strategy
A model problem for quasinormal ringdown on asymptotically flat or extremal black holes
Creators: name: Gajic, Dejan
name: Warnick, Claude
Publisher: name: arXiv
Year: 2019
Subjects: subject: Analysis of PDEs (math.AP)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider a wave equation with a potential on the half-line as a model problem for wave propagation close to an extremal horizon, or the asymptotically flat end of a black hole spacetime. We propose a definition of quasinormal frequencies (QNFs) as eigenvalues of the generator of time translations for a null foliation, acting on an appropriate (Gevrey based) Hilbert space. We show that this QNF spectrum is discrete in a subset of $\mathbb{C}$ which includes the region $\{$Re$(s) >-b$, $|$Im $(s)|> K\}$ for any $b>0$ and some $K=K(b) \gg 1$. As a corollary we establish the meromorphicity of the scattering resolvent in a sector $|$arg$(s)| \frac{2π}{3}$, and show that the poles occur only at quasinormal frequencies according to our definition. This result applies in situations where the method of complex scaling cannot be directly applied, as our potentials need not be analytic. Finally, we show that QNFs computed by the continued fraction method of Leaver are necessarily QNFs according to our new definition. This paper is a companion to [D. Gajic and C. Warnick, Quasinormal modes in extremal Reissner-Nordström spacetimes, preprint (2019)], which deals with the QNFs of the wave equation on the extremal Reissner-Nordström black hole.
description: 38 pages, 1 figure, version accepted for publication in JMP
Additional file 1 of Effectiveness of matching human leukocyte antigens (HLA) in corneal transplantation: a systematic review protocol
Creators: name: Gagandeep Singh Sachdeva
name: Cabada, Joshua Piollo
name: Karim, Syed Saad
name: Kahandawa, Dmitry Lakvin
name: Thomas, Kevin Anil
name: Anusha Kumar
name: Barry, Robert J.
name: Gibran Farook Butt
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy

description: Additional file 1. PRISMA-P 2015 Checklist
Additional file 14: of Erratum to: Host lifestyle affects human microbiota on daily timescales
Creators: name: David, Lawrence
name: Materna, Arne
name: Friedman, Jonathan
name: Baptista, Maria
name: Blackburn, Matthew
name: Perrotta, Allison
name: Erdman, Susan
name: Alm, Eric
Publisher: name: figshare
Year: 2019
Subjects: subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Developmental Biology
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Regression-based normalization example. (A) A toy community with five OTUs (blue dots) sampled on 2 different days is used to illustrate our normalization scheme. The Day 2 sample is sequenced twice as deeply as the Day 1 sample. Moreover, the community is unchanged across these days, except for one OTU that decreases by 90Â % on Day 2 (arrowed). Our normalization technique uses regression to infer relative differences in total bacterial abundance between samples. We use median-based line-fitting (blue line), which is robust to outliers and whose slope reflects the two-fold difference in sequencing depth. A standard least-squares regression through the origin is affected by the OTU with sharply decreased abundance. (B) Day 2 OTUs rescaled by the robust regression scaling factor are unchanged relative to Day 1 (blue dots). By contrast, rescaling Day 2â s OTUs with standard techniques (Day 2 OTU levels sum to Day 1 OTU levels; green dots) causes artifactual day-to-day changes among four OTUs (arrowed). (PDF 124 kb)
Demand for Complementary Financial and Technological Tools for Managing Drought Risk
Creators: name: Ward, Patrick S.
name: Spielman, David J.
name: Ortega, David L.
name: Ward, Patrick S.
name: Spielman, David J.
name: Ortega, David L.
Publisher: name: Unknown
Year: 2015
Subjects: Agribusiness
Financial Economics
Land Economics/Use

description: Financial and technological innovations that mitigate weather-related production risks have the potential to greatly benefit farmers in many risk-prone areas. In this study we examine farmers’ preferences for two distinct tools that allow them to manage drought risk: weather index insurance and a recently released drought-tolerant rice variety. We illustrate how these tools can independently address drought risk and demonstrate the additional benefits gained by combining them into a complementary risk management product. Findings indicate that farmers are generally unwilling to adopt the drought-tolerant variety independent of insurance, largely due to a yield penalty under non-drought conditions. When bundled with insurance, however, farmers’ valuation of the variety increases. Farmers value insurance on its own, but even more so when bundled with the drought-tolerant variety. The results provide evidence that farmers value the complementarities inherent in a well-calibrated bundle of risk management tools.
Additional file 1 of Predicting factors of failed induction of labor in three hospitals of Southwest Ethiopia: a cross-sectional study
Creators: name: Amare Genetu Ejigu
name: Shewangizaw H/Mariam Lambyo
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1.
Spin wave dispersion in La2CuO4
Creators: name: Peres, N. M. R.
name: Araujo, M. N.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We calculate the antiferromagnetic spin wave dispersion in the half-filled Hubbard model for a two-dimensional square lattice and find it to be in excellent agreement with recent high-resolution inelastic neutron scattering performed on La2CuO4 [Phys. Rev. Lett. 86, 5377 (2001)].
description: typos corrected
Von Staudt's theorem revisited
Creators: name: Havlicek, Hans
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 51A10 51C05 17C50

description: We establish a version of von Staudt's theorem on mappings which preserve harmonic quadruples for projective lines over (not necessarily commutative) rings with "sufficiently many" units, in particular 2 has to be a unit.
description: More typos corrected
The almost sure theory of finite metric spaces
Creators: name: Goldbring, Isaac
name: Hart, Bradd
name: Kruckman, Alex
Publisher: name: arXiv
Year: 2019
Subjects: subject: Logic (math.LO)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We establish an approximate zero-one law for sentences of continuous logic over finite metric spaces of diameter at most $1$. More precisely, we axiomatize a complete metric theory $T_{\mathrm{as}}$ such that, given any sentence $σ$ in the language of pure metric spaces and any $ε>0$, the probability that the difference of the value of $σ$ in a random metric space of size $n$ and the value of $σ$ in any model of $T_{\mathrm{as}}$ is less than $ε$ approaches $1$ as $n$ approaches infinity. We also establish some model-theoretic properties of the theory $T_{\mathrm{as}}$.
description: Final version
Additional file 15: of Erratum to: Host lifestyle affects human microbiota on daily timescales
Creators: name: David, Lawrence
name: Materna, Arne
name: Friedman, Jonathan
name: Baptista, Maria
name: Blackburn, Matthew
name: Perrotta, Allison
name: Erdman, Susan
name: Alm, Eric
Publisher: name: figshare
Year: 2019
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Results of testing normalization with four simulated datasets. (A) We simulated bacterial communities over time using Ornstein-Uhlenbeck processes fit to observed gut bacterial dynamics in Subject B. Total bacterial load among the synthetic communities varied over time (blue line; mean-centered on 1). We simulated 16S sequencing runs using the synthetic time series, and input the runs into our robust regression-based normalization. Bacterial load estimated from the normalized communities (red line) closely tracked the simulated bacterial load, suggesting our normalization scheme is accurate. (B) Even after accounting for autocorrelations in bacterial load over time (see Methods section on Autocorrelation elimination), we observed significant correlations between the simulated and inferred bacterial loads. (PDF 333 kb)
Additional file 1 of Minimum acceptable diet among children aged 6–23 months in South Kivu, Democratic Republic of Congo: a community-based cross-sectional study
Creators: name: Kambale, Richard Mbusa
name: Ngaboyeka, Gaylord Amani
name: Kasengi, Joe Bwija
name: Niyitegeka, Sarah
name: Boss Rutakaza Cinkenye
name: Baruti, Armand
name: Kizito Chentwali Mutuga
name: Van Der Linden, Dimitri
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1.
The Co-movement between Non-GM and GM Soybean Price in China: Evidence from China Futures Market
Creators: name: Wang, Nanying
name: Houston, Jack E.
name: Wang, Nanying
name: Houston, Jack E.
Publisher: name: Unknown
Year: 2015
Subjects: Crop Production/Industries
Environmental Economics and Policy
International Development

description: The price variability of agricultural commodities reached record levels in 2008, and again more recently in 2010, raising concerns about this increased price volatility would be temporal or structural. The Chinese soybean futures market is the second largest in the world in terms of trading volume. There are two soybean futures contracts in China: non-GM and GM. This study examines the volatility determinants as well as seasonality of non-GM and GM soybean futures prices traded in Dalian Commodity Exchange from 2005 to 2014. Also, we test the co-movement between these two soybeans markets. We analyze the volatility by incorporating changes in important economic variables into the Dynamic Conditional Correlation-Generalized Autoregressive Conditional Heteroskedastic (DCC-GARCH) model. This research provides statistical evidence that the futures prices of soybeans in China are being influenced by the increasing consumption of soybeans, the import quantity of soybean, the trading volume in futures market and weather.
Nuclei of Normal Rational Curves
Creators: name: Gmainer, Johannes
name: Havlicek, Hans
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: A $k$-nucleus of a normal rational curve in PG$(n,F)$ is the intersection over all $k$-dimensional osculating subspaces of the curve ($k\in\{-1,0,...,n-1\}$). It is well known that for characteristic zero all nuclei are empty. In case of characteristic $p>0$ and $# F\geq n$ the number of non-zero digits in the representation of $n+1$ in base $p$ equals the number of distinct nuclei. An explicit formula for the dimensions of $k$-nuclei is given for $# F\geq k+1$.
What determines suppliers' intensity of participation in the EU School Fruit Scheme
Creators: name: Von Germeten, Jan-Paul
name: Hartmann, Monika
name: Von Germeten, Jan-Paul
name: Hartmann, Monika
Publisher: name: Unknown
Year: 2015
Subjects: Crop Production/Industries
International Development

description: The purpose of this study is to identify the determinants of suppliers’ intensity of participation in the EU school fruit scheme (SFS) based on the example of the SFS in the German federal state North Rhine-Westphalia. In 2013/2014 approx. 100 suppliers including many agricultural enterprises or farm shops took part in a telephone survey. The data was processed by a factor analysis. Multivariate regression analyses were used to examine the determinants of intensity of participation. The findings reveal that the intensity of participation is influenced by the buyer-supplier-relationship, performance indicators and different types of costs.
Striped phase in a quantum XY-model with ring exchange
Creators: name: Sandvik, A. W.
name: Daul, S.
name: Singh, R. R. P.
name: Scalapino, D. J.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present quantum Monte Carlo results for a square-lattice S=1/2 XY-model with a standard nearest-neighbor coupling J and a four-spin ring exchange term K. Increasing K/J, we find that the ground state spin-stiffness vanishes at a critical point at which a spin gap opens and a striped bond-plaquette order emerges. At still higher K/J, this phase becomes unstable and the system develops a staggered magnetization. We discuss the quantum phase transitions between these phases.
description: 4 pages, 4 figures. v2: only minor changes
A Model of the Witt Design $W_{12}$ based on Quadrics of PG(2,3)
Creators: name: Havlicek, Hans
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: An elementary geometric proof for the existence of Witt's 5-(12,6,1) design is given.
Small-scale farming and hunger: the enabling role of social assistance programmes in South Africa’s former homelands
Creators: name: Von Fintel, Dieter
name: Pienaar, Louw
name: Von Fintel, Dieter
name: Pienaar, Louw
Publisher: name: Unknown
Year: 2015
Subjects: Farm Management
Food Security and Poverty
International Development

description: Cash transfers successfully alleviate poverty in many developing countries. South Africa is a case in point, implementing one of the largest unconditional cash transfer programmes internationally, and with substantial benefits to household well-being along multiple dimensions. Yet, grants discourage formal labour market attachment, creating dependencies on the fiscus. This study uses a fuzzy regression discontinuity design to establish that state-funded Old Age Pensions encourage non-market economic activity (in the form of small-scale farming), and improve the self-reported food security of rural households that farm, vis-à-vis those that do not. The role of small-scale farming is of broader interest in rural development, given the context of the 1913 and 1936 Land Acts that constrained this form of livelihood in former apartheid homelands. This paper’s contribution is two-fold: grants are an effective channel to actively promote rural development through small-scale farming, and they improve food security by non-market mechanisms.
title:  The Impact of Muscular Strength on Cardiovascular Disease Risk Factors
Creators: name: Harden, Joel Ernest
Publisher: name: Old Dominion University Libraries
Year: 2021

description: The purpose of this study was to determine the associations between isokinetic leg muscular strength and cardiovascular disease (CVD) risk factor characterizations in Americans aged 50 and older. Using a publicly available dataset from the National Health and Nutrition Examination Survey (NHANES), a secondary analysis was conducted on participants (males ≥50 yrs; females ≥55 yrs; N=10,858) pooled from 1999 to 2002. CVD risk factors were determined using the American College of Sports Medicine (ACSM) cutoff values, with all nine ACSM risk factors analyzed. CVD risk factor characterization was determined by creating CVD risk factor profiles (i.e., the total number of CVD risk factors an individual possesses), then separating participants into low (0-2 CVD risk factors), moderate (3-5 CVD risk factors), and high (6-8 CVD risk factors) risk factor characterizations. Muscular strength was determined by isokinetic maximal peak force (PF) of the leg extensors, both raw and normalized to body mass. Normalized, but not raw, muscular strength was shown to be significantly inversely associated with CVD risk factor characterization for both males and females (P<0.001). Additionally, when adjusting for all other CVD risk factors, age (males: OR: 1.13, 95% CI: 1.11-1.15; females: OR: 1.12; 95% CI: 1.10-1.15) obesity (males: OR: 0.54; 95% CI: 0.40-0.72; females: OR: 0.58; 95% CI: 0.41-0.82), and smoking status (males: OR: 1.72; 95% CI: 1.31-2.26; females: OR: 1.39; 95% CI: 1.04-1.86) were significantly associated with isokinetic leg extensor muscular strength in both males and females, while blood glucose (OR: 1.41; 95% CI: 1.07-1.86) was only associated with muscular strength in males. Evidence from the present study supports the notion that muscular strength may have a protective effect against CVD. However, this association must be shown independent of cardiorespiratory fitness (CRF) and in clinical trials before any causative link can be established.
Affine Spaces within Projective Spaces
Creators: name: Blunck, Andrea
name: Havlicek, Hans
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 51A30, 51A40, 51A45

description: We endow the set of complements of a fixed subspace of a projective space with the structure of an affine space, and show that certain lines of such an affine space are affine reguli or cones over affine reguli. Moreover, we apply our concepts to the problem of describing dual spreads. We do not assume that the projective space is finite-dimensional or pappian.
Coping with landslide risk through preventive resettlement. Designing optimal strategies through choice experiments for the Mount Elgon region, Uganda
Creators: name: Vlaeminck, Pieter
name: Maertens, Miet
name: Isabirye, Moses
name: Vanderhoydonks, Filip
name: Poesen, Jean
name: Deckers, Jozef
name: Vranken, Liesbet
name: Vlaeminck, Pieter
name: Maertens, Miet
name: Isabirye, Moses
name: Vanderhoydonks, Filip
name: Poesen, Jean
name: Deckers, Jozef
name: Vranken, Liesbet
Publisher: name: Unknown
Year: 2015
Subjects: International Development
Land Economics/Use

description: Landslides are a widespread phenomenon in the East African highlands, significantly reducing agricultural productivity and affecting rural income generating activities. In addition, the livelihoods of the poorest are most likely to be adversely affected by landslides. Traditionally, landslide risk is reduced by means of effective planning and management. However, in many regions, these measures are incapable to offer a long-term solution because of high population density and land shortage. Therefore, our paper uses a choice experiment to investigate whether preventive resettlement could be a feasible disaster risk reduction strategy for the population at risk in agricultural areas in Bududa district, East Uganda. Our study provides the first analysis of resettlement related preferences of people that are affected by environmental degradation. Our results enable us to assess community support for resettlement strategies ex ante and give valuable policy advice for future resettlement plans in a very cost-effective manner.
Sextic tensor field theories in rank $3$ and $5$
Creators: name: Benedetti, Dario
name: Delporte, Nicolas
name: Harribey, Sabine
name: Sinha, Ritam
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study bosonic tensor field theories with sextic interactions in $d<3$ dimensions. We consider two models, with rank-3 and rank-5 tensors, and $U(N)^3$ and $O(N)^5$ symmetry, respectively. For both of them we consider two variations: one with standard short-range free propagator, and one with critical long-range propagator, such that the sextic interactions are marginal in any $d<3$. We derive the set of beta functions at large $N$, compute them explicitly at four loops, and identify the respective fixed points. We find that only the rank-3 models admit a melonic interacting fixed points, with real couplings and critical exponents: for the short-range model, we have a Wilson-Fisher fixed point with couplings of order $\sqrtε$, in $d=3-ε$; for the long-range model, instead we have for any $d<3$ a line of fixed points, parametrized by a real coupling $g_1$ (associated to the so-called wheel interaction). By standard conformal field theory methods, we then study the spectrum of bilinear operators associated to such interacting fixed points, and we find a real spectrum for small $ε$ or small $g_1$.
description: 37 pages, v2: added some comments and figures, extended conclusions section, v3: corrected some numerical factors, qualitative results unchanged
On linear morphisms of product spaces
Creators: name: Bichara, Alessandro
name: Havlicek, Hans
name: Zanella, Corrado
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 51M35

description: Let $χ$ be a linear morphism of the product of two projective spaces $PG(n,F)$ and $PG(m,F)$ into a projective space. Let $γ$ be the Segre embedding of such a product. In this paper we give some sufficient conditions for the existence of an automorphism $α$ of the product space and a linear morphisms of projective spaces $ϕ$, such that $γϕ=αχ$.
Tentax badasi Fibiger 2011, new species
Creators: name: Fibiger, Michael
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Erebidae
Tentax
Tentax badasi

description: Tentax badasi Fibiger, new species
(Plate 4, figure 7; male genit. plate 20, figure 1)
description: Published as part of Fibiger, Michael, 2011, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea). Part 4, Taxonomy of the subfamilies Tentaxinae and Micronoctuinae, pp. 1-188 in Zootaxa 2842 (2842) on page 50, DOI: 10.11646/ZOOTAXA.2842.1.1, http://zenodo.org/record/10095402
Higher-Dimensional Quantum Hall Effect in String Theory
Creators: name: Fabinger, Michal
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We construct a string theory realization of the 4+1d quantum Hall effect recently discovered by Zhang and Hu. The string theory picture contains coincident D4-branes forming an S^4 and having D0-branes (i.e. instantons) in their world-volume. The charged particles are modelled as string ends. Their configuration space approaches in the large n limit a CP^3, which is an S^2 fibration over S^4, the extra S^2 being made out of the Chan-Paton degrees of freedom. An alternative matrix theory description involves the fuzzy four-sphere. We also find that there is a hierarchy of quantum Hall effects in odd-dimensional spacetimes, generalizing the known cases in 2+1d and 4+1d.
description: 13 pages, 2 figures, references added
Another Simple Proof for the Existence of the Small Witt Design
Creators: name: Havlicek, Hans
name: Lenz, Hanfried
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We give a short proof for the existence of the small Witt design which is based on the projective plane of order three with one point deleted.
title: 01_2007
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
GLAST Dark Matter Search
Creators: name: Wai, Lawrence
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The GLAST Large Area Telescope, scheduled for launch in 2006, is a next generation space based gamma ray telescope which will improve in point source sensitivity by a factor of 30 over that of EGRET below 10 GeV, and extend beyond EGRET up to 300 GeV. Thus GLAST offers a unique opportunity to discover WIMP dark matter through precision studies of gamma rays produced in pair annihilations. The most dense region of dark matter in our galaxy is currently thought to occur at the center; in particular, dark matter should concentrate within 3 pc of the putative supermassive black hole located at the SgrA* radio source. In fact, the 2nd and 3rd EGRET catalogs contain a significant point source coincident with the Milky Way galactic center within a resolution of 12 arcminutes. The EGRET team has determined that the spectral and temporal characteristics of this point source are consistent with dark matter WIMP annihilations. More detailed analysis has determined that the magnitude and spectrum of the EGRET source is consistent with relic WIMPs concentrated within 3 pc of the central supermassive black hole. Furthermore, the SgrA* radio emission is consistent with the synchrotron radiation expected from electrons and positrons produced in WIMP annihilations. If true, then GLAST should be able to constrain the particle properties of the postulated WIMP with 1 month of data.
description: Poster at the XXII Physics in Collisions Conference (PIC02), Stanford, Ca, USA, June 2002, 3 pages, LaTeX, 2 eps figures. PSN THAP03
Additional file 12: of Erratum to: Host lifestyle affects human microbiota on daily timescales
Creators: name: David, Lawrence
name: Materna, Arne
name: Friedman, Jonathan
name: Baptista, Maria
name: Blackburn, Matthew
name: Perrotta, Allison
name: Erdman, Susan
name: Alm, Eric
Publisher: name: figshare
Year: 2019
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: 60506 Virology

description: Description of host metadata categories. (PDF 46 kb)