1,841 research outputs found
Uniaxial stress tuning of geometrical frustration in a Kondo lattice
Hexagonal CeRhSn with paramagnetic moments on a distorted Kagome lattice
displays zero-field quantum critical behavior related to geometrical
frustration. We report high-resolution thermal expansion and magnetostriction
measurements under multiextreme conditions such as uniaxial stress up to 200
MPa, temperatures down to 0.1 K and magnetic fields up to 10 T. Under uniaxial
stress along the -direction, quantum criticality disappears and a complex
magnetic phase diagram arises with a sequence of phases below 1.2 K and fields
between 0 and 3 T (). Since the Kondo coupling increases with
stress, which alone would stabilize paramagnetic behavior in CeRhSn, the
observed order arises from the release of geometrical frustration by in-plane
stress.Comment: Accepted in PRB Rapid Com
Influenza A virus OP7 defective interfering particles: Cell culture-based production and antiviral efficacy in vivo
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Astrophysical reaction rate for Be by photodisintegration
We study the astrophysical reaction rate for the formation of Be
through the three body reaction . This reaction is one
of the key reactions which could bridge the mass gap at A = 8 nuclear systems
to produce intermediate-to-heavy mass elements in alpha- and neutron-rich
environments such as r-process nucleosynthesis in supernova explosions,
s-process nucleosynthesis in asymptotic giant branch (AGB) stars, and
primordial nucleosynthesis in baryon inhomogeneous cosmological models. To
calculate the thermonuclear reaction rate in a wide range of temperatures, we
numerically integrate the thermal average of cross sections assuming a
two-steps formation through a metastable Be. Off-resonant and on-resonant
contributions from the ground state in Be are taken into account. As
input cross section, we adopt the latest experimental data by
photodisintegration of Be with laser-electron photon beams, which covers
all relevant resonances in Be. We provide the reaction rate for
Be in the temperature range from T=10
to T=10 both in the tabular form and in the analytical form. The
calculated reaction rate is compared with the reaction rates of the CF88 and
the NACRE compilations. The CF88 rate is valid at due to lack
of the off-resonant contribution. The CF88 rate differs from the present rate
by a factor of two in a temperature range . The NACRE rate,
which adopted different sources of experimental information on resonance states
in Be, is 4--12 times larger than the present rate at ,
but is consistent with the present rate to within at .Comment: 32 pages (incl 6 figures), Nucl. Phys. in pres
Emission properties of YAG: Ce ceramics with barium fluoride flux
In this work, we investigated the luminescent properties of YAG, Ce ceramics with an addition of barium fluoride flux. The ceramic samples were sintered from obtained YAG: Ce, BaF2 phosphor powder. Morphological, luminescent and decay time characteristics of YAG: Ce ceramics were investigated. The luminescence decay kinetics analysis of the ceramics showed that the decay time in phosphors and ceramics is different in the visual spectral range
Measurement of the cross-section and charge asymmetry of bosons produced in proton-proton collisions at TeV with the ATLAS detector
This paper presents measurements of the and cross-sections and the associated charge asymmetry as a
function of the absolute pseudorapidity of the decay muon. The data were
collected in proton--proton collisions at a centre-of-mass energy of 8 TeV with
the ATLAS experiment at the LHC and correspond to a total integrated luminosity
of 20.2~\mbox{fb^{-1}}. The precision of the cross-section measurements
varies between 0.8% to 1.5% as a function of the pseudorapidity, excluding the
1.9% uncertainty on the integrated luminosity. The charge asymmetry is measured
with an uncertainty between 0.002 and 0.003. The results are compared with
predictions based on next-to-next-to-leading-order calculations with various
parton distribution functions and have the sensitivity to discriminate between
them.Comment: 38 pages in total, author list starting page 22, 5 figures, 4 tables,
submitted to EPJC. All figures including auxiliary figures are available at
https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-13
Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in √s=13 TeV pp collisions with the ATLAS detector
A search for supersymmetry through the pair production of electroweakinos with mass splittings near the electroweak scale and decaying via on-shell W and Z bosons is presented for a three-lepton final state. The analyzed proton-proton collision data taken at a center-of-mass energy of √s=13 TeV were collected between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb−1. A search, emulating the recursive jigsaw reconstruction technique with easily reproducible laboratory-frame variables, is performed. The two excesses observed in the 2015–2016 data recursive jigsaw analysis in the low-mass three-lepton phase space are reproduced. Results with the full data set are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at the 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV
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Untangling a Web of Lies: Exploring Automated Detection of Deception in Computer-Mediated Communication
Safeguarding organizations against opportunism and severe deception in computer-mediated communication (CMC) presents a major challenge to CIOs and IT managers. New insights into linguistic cues of deception derive from the speech acts innate to CMC. Applying automated text analysis to archival email exchanges in a CMC system as part of a reward program, we assess the ability of word use (micro-level), message development (macro-level), and intertextual exchange cues (meta-level) to detect severe deception by business partners. We empirically assess the predictive ability of our framework using an ordinal multilevel regression model. Results indicate that deceivers minimize the use of referencing and self-deprecation but include more superfluous descriptions and flattery. Deceitful channel partners also over structure their arguments and rapidly mimic the linguistic style of the account manager across dyadic e-mail exchanges. Thanks to its diagnostic value, the proposed framework can support firms’ decision-making and guide compliance monitoring system development
Defining the phenotypical spectrum associated with variants in TUBB2A
Background Variants in genes belonging to the tubulin superfamily account for a heterogeneous spectrum of brain malformations referred to as tubulinopathies. Variants in TUBB2A have been reported in 10 patients with a broad spectrum of brain imaging features, ranging from a normal cortex to polymicrogyria, while one patient has been reported with progressive atrophy of the cerebellar vermis. Methods In order to further refine the phenotypical spectrum associated with TUBB2A, clinical and imaging features of 12 patients with pathogenic TUBB2A variants, recruited via the international network of the authors, were reviewed. Results We report 12 patients with eight novel and one recurrent variants spread throughout the TUBB2A gene but encoding for amino acids clustering at the protein surface. Eleven patients (91.7%) developed seizures in early life. All patients suffered from intellectual disability, and 11 patients had severe motor developmental delay, with 4 patients (36.4 %) being non-ambulatory. The cerebral cortex was normal in five individuals and showed dysgyria of variable severity in seven patients. Associated brain malformations were less frequent in TUBB2A patients compared with other tubulinopathies. None of the patients had progressive cerebellar atrophy. Conclusion The imaging phenotype associated with pathogenic variants in TUBB2A is highly variable, ranging from a normal cortex to extensive dysgyria with associated brain malformations. For recurrent variants, no clear genotype-phenotype correlations could be established, suggesting the role of additional modifiers.</p
Defining the phenotypical spectrum associated with variants in TUBB2A
Background Variants in genes belonging to the tubulin superfamily account for a heterogeneous spectrum of brain malformations referred to as tubulinopathies. Variants in TUBB2A have been reported in 10 patients with a broad spectrum of brain imaging features, ranging from a normal cortex to polymicrogyria, while one patient has been reported with progressive atrophy of the cerebellar vermis. Methods In order to further refine the phenotypical spectrum associated with TUBB2A, clinical and imaging features of 12 patients with pathogenic TUBB2A variants, recruited via the international network of the authors, were reviewed. Results We report 12 patients with eight novel and one recurrent variants spread throughout the TUBB2A gene but encoding for amino acids clustering at the protein surface. Eleven patients (91.7%) developed seizures in early life. All patients suffered from intellectual disability, and 11 patients had severe motor developmental delay, with 4 patients (36.4 %) being non-ambulatory. The cerebral cortex was normal in five individuals and showed dysgyria of variable severity in seven patients. Associated brain malformations were less frequent in TUBB2A patients compared with other tubulinopathies. None of the patients had progressive cerebellar atrophy. Conclusion The imaging phenotype associated with pathogenic variants in TUBB2A is highly variable, ranging from a normal cortex to extensive dysgyria with associated brain malformations. For recurrent variants, no clear genotype-phenotype correlations could be established, suggesting the role of additional modifiers.</p
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