pinecone/core-2020-05-10-deduplication huggingface dataset:
Constructions in R[x1,…,xn]: applications to K-theory

AbstractA classical result in K-theory about polynomial rings like the Quillen–Suslin theorem admits an algorithmic approach when the ring of coefficients has some computational properties, associated with Gröbner bases. There are several algorithms when we work in K[x1,…,xn], K a field. In this paper we compute a free basis of a finitely generated projective module over R[x1,…,xn], R a principal ideal domain with additional properties, test the freeness for projective modules over D[x1,…,xn], with D a Dedekind domain like Z[−5] and for the one variable case compute a free basis if there exists any
The effect of neuronal conditional knock-out of peroxisome proliferator-activated receptors in the MPTP mouse model of Parkinson’s disease

AbstractActivation of peroxisome proliferator-activated receptors (PPARs), namely PPARγ and PPARδ, has been shown to provide neuroprotection in a number of neurodegenerative disorders, such as Alzheimer’s and Parkinson’s disease (PD). The observed neuroprotective effects in experimental models of PD have been linked to anti-oxidant and anti-inflammatory actions. This study aimed to analyze the full influence of these receptors in neuroprotection by generating a nerve cell-specific conditional knock-out of these receptors and subjecting these genetically modified mice to the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) neurotoxin to model dopaminergic degeneration. Mice null for both receptors show the lowest levels of tyrosine hydroxylase (TH)-positive cell bodies following MPTP administration. Presence of one or both these receptors show a trend toward protection against this degeneration, as higher dopaminergic cell immunoreactivity and striatal monoamine levels are evident. These data supplement recent studies that have elected to use agonists of the receptors to regulate immune responses. The results place further importance on the activation of PPARs and the neuroprotective roles these have in inflammatory processes linked to neurodegenerative processes
PPAR-α transcriptional activity is required to combat doxorubicin-induced podocyte injury in mice

Immunosuppressants and inhibitors of the renin angiotensin system are major reagents to treat nephrotic syndrome but their clinical effects are not necessarily satisfactory. Injection of doxorubicin in several strains of mice causes nephrotic syndrome–like disorder. Zhou et al. report that PPAR-α expression is downregulated in murine doxorubicin nephropathy and a PPAR-α agonist, fenofibrate, partially ameliorates the disorder induced likely through stabilization of nephrin expression and suppression of apoptosis in podocytes, providing a new preventive strategy
Audit-based education lowers systolic blood pressure in chronic kidney disease: the Quality Improvement in CKD (QICKD) trial results

Strict control of systolic blood pressure is known to slow progression of chronic kidney disease (CKD). Here we compared audit-based education (ABE) to guidelines and prompts or usual practice in lowering systolic blood pressure in people with CKD. This 2-year cluster randomized trial included 93 volunteer general practices randomized into three arms with 30 ABE practices, 32 with guidelines and prompts, and 31 usual practices. An intervention effect on the primary outcome, systolic blood pressure, was calculated using a multilevel model to predict changes after the intervention. The prevalence of CKD was 7.29% (41,183 of 565,016 patients) with all cardiovascular comorbidities more common in those with CKD. Our models showed that the systolic blood pressure was significantly lowered by 2.41mmHg (CI 0.59–4.29mmHg), in the ABE practices with an odds ratio of achieving at least a 5mmHg reduction in systolic blood pressure of 1.24 (CI 1.05–1.45). Practices exposed to guidelines and prompts produced no significant change compared to usual practice. Male gender, ABE, ischemic heart disease, and congestive heart failure were independently associated with a greater lowering of systolic blood pressure but the converse applied to hypertension and age over 75 years. There were no reports of harm. Thus, individuals receiving ABE are more likely to achieve a lower blood pressure than those receiving only usual practice. The findings should be interpreted with caution due to the wide confidence intervals
The basic cohomology of the twisted N=16, D=2 super-Maxwell theory

AbstractWe consider a recently proposed two-dimensional Abelian model for a Hodge theory, which is neither a Witten-type nor a Schwarz-type topological gauge theory. It is argumented that this model is not a good candidate for a Hodge theory because, on-shell, the BRST Laplacian vanishes. We show, that this model allows a natural extension such that the resulting topological theory is of Witten type and can be identified with the twisted N=16, D=2 super-Maxwell theory. Furthermore, the underlying basic cohomology preserves the Hodge-type structure and, on-shell, the BRST Laplacian does not vanish
The paradox between low shock-stage and evidence for compaction in CM carbonaceous chondrites explained by multiple low-intensity impacts

AbstractPetrographic analysis of eight CM carbonaceous chondrites (EET 96029, LAP 031166, LON 94101, MET 01072, Murchison, Murray, SCO 06043, QUE 93005) by electron imaging and diffraction, and X-ray computed tomography, reveals that six of them have a petrofabric defined by shock flattened chondrules. With the exception of Murchison, those CMs that have a strong petrofabric also contain open or mineralized fractures, indicating that tensional stresses accompanying the impacts were sufficient to locally exceed the yield strength of the meteorite matrix. The CMs studied span a wide range of petrologic subtypes, and in common with Rubin (2012) we find that the strength of their petrofabrics increases with their degree of aqueous alteration. This correspondence suggests that impacts were responsible for enhancing alteration, probably because the fracture networks they formed tapped fluid reservoirs elsewhere in the parent body. Two meteorites that do not fit this pattern are MET 01072 and Murchison; both have a strong petrofabric but are relatively unaltered. In the case of MET 01072, impact deformation is likely to have postdated parent body aqueous activity. The same may also be true for Murchison, but as this meteorite also lacks fractures and veins, its chondrules were most likely flattened by multiple low intensity impacts. Multiphase deformation of Murchison is also revealed by the microstructures of calcite grains, and chondrule-defined petrofabrics as revealed by X-ray computed tomography. The contradiction between the commonplace evidence for impact-deformation of CMs and their low shock stages (most belong to S1) can be explained by most if not all having been exposed to multiple low intensity (i.e., <5GPa) shock events. Aqueous alteration was enhanced by those impacts that were of sufficient intensity to open high permeability fracture networks that could connect to fluid reservoirs
Di-Higgs final states augMT2ed – Selecting hh events at the high luminosity LHC

AbstractHiggs boson self-interactions can be investigated via di-Higgs (pp→hh+X) production at the LHC. With a small O(30) fb Standard Model production cross section, and a large tt¯ background, this measurement has been considered challenging, even at a luminosity-upgraded LHC. We demonstrate that by using simple kinematic bounding variables, of the sort already employed in existing LHC searches, the dominant tt¯ background can be largely eliminated. Simulations of the signal and the dominant background demonstrate the prospect for measurement of the di-Higgs production cross section at the 30% level using 3 ab−1 of integrated luminosity at a high luminosity LHC. This corresponds to a Higgs self-coupling determination with 60% accuracy in the bb¯τ+τ− mode, with potential for further improvements from e.g. subjet technologies and from additional di-Higgs decay channels
Small linearly equivalent G-sets and a construction of Beaulieu

AbstractTwo G-sets (G a finite group) are called linearly equivalent over a commutative ring k if the permutation representations k[X] and k[Y] are isomorphic as modules over the group algebra kG. Pairs of linearly equivalent non-isomorphic G-sets have applications in number theory and geometry. We characterize the groups G for which such pairs exist for any field, and give a simple construction of these pairs. If k is Q, these are precisely the non-cyclic groups. For any non-cyclic group, we prove that there exist G-sets which are non-isomorphic and linearly equivalent over Q, of cardinality ⩽3(#G)/2. Also, we investigate a construction of P. Beaulieu which allows us to construct pairs of transitive linearly equivalent Sn-sets from arbitrary G-sets for an arbitrary group G. We show that this construction works over all fields and use it construct, for each finite set P of primes, Sn-sets linearly equivalent over a field k if and only if the characteristic of k lies in P
Plancherel Formula for Berezin Deformation of L2 on Riemannian Symmetric Space

AbstractConsider natural representations of the pseudounitary group U(p, q) in the space of holomorphic functions on the Cartan domain (Hermitian symmetric space) U(p, q)/(U(p)×U(q)). Berezin representations of O(p, q) are the restrictions of such representations to the subgroup O(p, q). We obtain the explicit Plancherel formula for the Berezin representations. The support of the Plancherel measure is a union of many series of representations. The density of the Plancherel measure on each piece of the support is an explicit product of Γ-functions. We also show that the Berezin representations give an interpolation between L2 on noncompact symmetric space O(p, q)/O(p)×O(q) and L2 on compact symmetric space O(p+q)/O(p)×O(q)
Validating the semantics of a medical iconic language using ontological reasoning

AbstractTo help clinicians read medical texts such as clinical practice guidelines or drug monographs, we proposed an iconic language called VCM. This language can use icons to represent the main medical concepts, including diseases, symptoms, treatments and follow-up procedures, by combining various pictograms, shapes and colors. However, the semantics of this language have not been formalized, and users may create inconsistent icons, e.g. by combining the “tumor” shape and the “sleeping” pictograms into a “tumor of sleeping” icon. This work aims to represent the VCM language using DLs and OWL for evaluating its semantics by reasoners, and in particular for determining inconsistent icons.We designed an ontology for formalized the semantics of VCM icons using the Protégé editor and scripts for translating the VCM lexicon in OWL. We evaluated the ability of the ontology to determine icon consistency for a set of 100 random icons. The evaluation showed good results for determining icon consistency, with a high sensitivity. The ontology may also be useful for the design of mapping between VCM and other medical terminologies, for generating textual labels for icons, and for developing user interfaces for creating VCM icons
Renormalizable sectors in resonance chiral theory: S→ππ decay amplitude

AbstractWe develop a resonance chiral theory without any a priori limitation on the number of derivatives in the hadronic operators. Through an exhaustive analysis of the resonance Lagrangian within the chiral limit and by means of field redefinitions, we find that the number of independent operator contributing to the S→ππ decay amplitude is finite: there is only one single-trace operator (the cd term) and three multi-trace terms. The deep implication of this fact is that the ultraviolet divergences that appear in this amplitude at the loop level can only appear through these chiral invariant structures. Hence, a renormalization of these couplings renders the amplitude finite
Combining the regularization strategy and the SQP to solve MPCC — A MATLAB implementation

AbstractMathematical Program with Complementarity Constraints (MPCC) plays a very important role in many fields such as engineering design, economic equilibrium, multilevel games, and mathematical programming theory itself. In theory its constraints fail to satisfy a standard constraint qualification such as the linear independence constraint qualification (LICQ) or the Mangasarian–Fromovitz constraint qualification (MFCQ) at any feasible point. As a result, the developed nonlinear programming theory may not be applied to MPCC class directly. Nowadays, a natural and popular approach is trying to find some suitable approximations of an MPCC so that it can be solved by solving a sequence of nonlinear programs.This work aims to solve the MPCC using nonlinear programming techniques, namely the SQP and the regularization scheme. Some algorithms with two iterative processes, the inner and the external, were developed. A set of AMPL problems from MacMPEC database (Leyffer, 2000) [8] were tested. The comparative analysis regarding performance of algorithms was carried out
Lattice study on kaon–pion scattering length in the I=3/2 channel

AbstractUsing the tadpole improved Wilson quark action on small, coarse and anisotropic lattices, Kπ scattering length in the I=3/2 channel is calculated within quenched approximation. The results are extrapolated towards the chiral and physical kaon mass region. Finite volume and finite lattice spacing errors are also analyzed and a result in the infinite volume and continuum limit is obtained. Our result is compared with the results obtained using Roy equations, chiral perturbation theory, dispersion relations and the experimental data
Developmental programming: Cumulative effects of increased pre-hatching corticosterone levels and post-hatching unpredictable food availability on physiology and behaviour in adulthood

AbstractProlonged exposure to stress during development can have long-term detrimental effects on health and wellbeing. However, the environmental matching hypothesis proposes that developmental stress programs physiology and behaviour in an adaptive way that can enhance fitness if early environments match those experienced later in life. Most research has focused on the harmful effects that stress during a single period in early life may exert in adulthood. In this study, we tested the potential additive and beneficial effects that stress experienced during both pre- and post-hatching development may have on adult physiology and behaviour. Japanese quail experienced different stress-related treatments across two developmental life stages: pre-hatching corticosterone (CORT) injection, post-hatching unpredictable food availability, both pre- and post-hatching treatments, or control. In adulthood, we determined quails' acute stress response, neophobia and novel environment exploration. The pre-hatching CORT treatment resulted in attenuated physiological responses to an acute stressor, increased activity levels and exploration in a novel environment. Post-hatching unpredictable food availability decreased adults' latency to feed. Furthermore, there were cumulative effects of these treatments across the two developmental stages: quail subjected to both pre- and post-hatching treatments were the most explorative and risk-taking of all treatment groups. Such responses to novel environments could enhance survival in unpredictable environments in later life. Our data also suggest that these behavioural responses may have been mediated by long-term physiological programming of the adrenocortical stress response, creating phenotypes that could exhibit fitness-enhancing behaviours in a changing environment
Holographic model at finite temperature with R-charge density

AbstractWe consider a holographic model of QCD at finite temperature with nonzero chemical potentials conjugate to R-charge densities. A critical surface of the confinement–deconfinement phase transition is shown for five-dimensional charged black hole solution given by Behrndt, Cvetič and Sabra. On a special section of the parameter space, we find a critical curve being similar to the one expected in QCD. We calculate meson spectra and decay constants in the confinement phase of this section to see their temperature and chemical potential dependences. We could assure generalized Gell-Mann–Oakes–Renner relation and the reduction of pion velocity near the critical point
Microsatellite-aided screening for fertility restorer genes (Rf) facilitates hybrid improvement

DNA markers enabled to determine the chromosomal locations of the two Rf genes (Rf3 and Rf4) in the wild abortive-cytoplasmic male sterility (WA-CMS) system. Four simple sequence repeats (SSR or microsatellites) RM171, RM258, RM315 and RM443 were used to detect the allelic status with respect to the fertility restoring genes (Rf3 and Rf4) in 300 rice cultivars and breeding lines. Furthermore, 45 lines selected using SSR markers were mated with a CMS line (IR58025A) to analyze their restoring ability. The results revealed that 90 lines had Rf3, 65 lines had Rf4 and 45 lines had Rf3 and Rf4 alleles out of 300 lines screened. Offspring of all test lines except HHZ 8-SAL9DT1-Y1, HHZ 5-SAL9-Y3-1 and IDSA 77 exhibited high pollen and spikelet fertility (> 80%), thus confirming they bear Rf alleles. the hybrid offspring of ARH12-6-1-1-B-3-1, IR32307-10-3-2-1 and Sahel329 had the highest pollen and spikelet fertility, (95.1–97, 4%, and 97.1–98.3%, 97.1-96.1% respectively)
The EBLM project III. A Saturn-size low-mass star at the
  hydrogen-burning limit

We report the discovery of an eclipsing binary system with mass-ratio q
$\sim$ 0.07. After identifying a periodic photometric signal received by WASP,
we obtained CORALIE spectroscopic radial velocities and follow-up light curves
with the Euler and TRAPPIST telescopes. From a joint fit of these data we
determine that EBLM J0555-57 consists of a sun-like primary star that is
eclipsed by a low-mass companion, on a weakly eccentric 7.8-day orbit. Using a
mass estimate for the primary star derived from stellar models, we determine a
companion mass of $85 \pm 4 M_{\rm Jup}$ ($0.081M_{\odot}$) and a radius of
$0.84^{+0.14}_{-0.04} R_{\rm Jup}$ ($0.084 R_{\odot}$) that is comparable to
that of Saturn. EBLM J0555-57Ab has a surface gravity $\log g_\mathrm{2} =
5.50^{+0.03}_{-0.13}$ and is one of the densest non-stellar-remnant objects
currently known. These measurements are consistent with models of low-mass
stars.Comment: Accepted for publication in A&A, 6 pages, 5 figure
Canonical surfaces associated with projectors in Grassmannian sigma models.

We discuss the construction of higher-dimensional surfaces based on the harmonic maps of S2 into PN−1 and other Grassmannians. We show that there are two ways of implementing this procedure—both based on the use of the relevant projectors. We study various properties of such projectors and show that the Gaussian curvature of these surfaces, in general, is not constant. We look in detail at the surfaces corresponding to the Veronese sequence of such maps and show that for all of them this curvature is constant but its value depends on which mapping is used in the construction of the surface
A high resolution foreground model for the MWA EoR1 field :
                    model and implications for EoR power spectrum analysis

This article has been published in a revised form in Publications of the Astronomical Society of Australia https://doi.org/10.1017/pasa.2017.26 This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. Under embargo. Embargo end date: 10 February 2018. ?? Astronomical Society of Australia 2017.The current generation of experiments aiming to detect the neutral hydrogen signal from the Epoch of Reionisation (EoR) is likely to be limited by systematic effects associated with removing foreground sources from target fields. In this paper we develop a model for the compact foreground sources in one of the target fields of the MWA's EoR key science experiment: the `EoR1' field. The model is based on both the MWA's GLEAM survey and GMRT 150 MHz data from the TGSS survey, the latter providing higher angular resolution and better astrometric accuracy for compact sources than is available from the MWA alone. The model contains 5049 sources, some of which have complicated morphology in MWA data, Fornax A being the most complex. The higher resolution data show that 13% of sources that appear point-like to the MWA have complicated morphology such as double and quad structure, with a typical separation of 33~arcsec. We derive an analytic expression for the error introduced into the EoR two-dimensional power spectrum due to peeling close double sources as single point sources and show that for the measured source properties, the error in the power spectrum is confined to high $k_\bot$ modes that do not affect the overall result for the large-scale cosmological signal of interest. The brightest ten mis-modelled sources in the field contribute 90% of the power bias in the data, suggesting that it is most critical to improve the models of the brightest sources. With this hybrid model we reprocess data from the EoR1 field and show a maximum of 8% improved calibration accuracy and a factor of two reduction in residual power in $k$-space from peeling these sources. Implications for future EoR experiments including the SKA are discussed in relation to the improvements obtained
Long-term cropping systems and tillage management effects on soil organic carbon stocks and steady state level of C sequestration rates in a semiarid environment

A calcareous and clayey xeric Chromic Haploxerept of a long-term experimental site in Sicily (Italy) was sampled (0–15 cm depth) under different land use management and cropping systems (CSs) to study their effect on soil aggregate stability and organic carbon (SOC). The experimental site had three tillage managements (no till [NT], dual-layer [DL] and conventional tillage [CT]) and two CSs (durum wheat monocropping [W] and durum wheat/faba bean rotation [WB]). The annually sequestered SOC with W was 2·75-times higher than with WB. SOC concentrations were also higher. Both NT and CT management systems were the most effective in SOC sequestration whereas with DL system no C was sequestered. The differences in SOC concentrations between NT and CT were surprisingly small. Cumulative C input of all cropping and tillage systems and the annually sequestered SOC indicated that a steady state occurred at a sequestration rate of 7·4 Mg C ha−1 y−1. Independent of the CSs, most of the SOC was stored in the silt and clay fraction. This fraction had a high N content which is typical for organic matter interacting with minerals. Macroaggregates (>250 µm) and large microaggregates (75–250 µm) were influenced by the treatments whereas the finest fractions were not. DL reduced the SOC in macroaggregates while NT and CT gave rise to higher SOC contents. In Mediterranean areas with Vertisols, agricultural strategies aimed at increasing the SOC contents should probably consider enhancing the proportion of coarser soil fractions so that, in the short-term, organic C can be accumulated