pinecone/core-2020-05-10-deduplication huggingface dataset:
See Paris and ... found a business? The impact of cross-cultural experience on opportunity recognition capabilities

Internationally mobile individuals such as migrants and expatriates exhibit a higher level of entrepreneurial activity than people without cross-cultural experience. Current research suggests that this pattern is rooted in specific resources and institutional arrangements that increase the attractiveness of exploiting entrepreneurial opportunities. In this study, we provide an additional explanation: We argue that cross-cultural experience increases the ability to recognize entrepreneurial opportunities. This argument is supported by two complementary studies - a longitudinal quasi-experiment and a priming experiment. We find convergent evidence that cross-cultural experience increases a person's capabilities to recognize particularly profitable types of opportunities by facilitating the application of cross-cultural knowledge for the discovery of arbitrage opportunities and creative recombination. (authors' abstract
$W^{\pm}Z$ production at hadron colliders in NNLO QCD

We report on the first computation of the next-to-next-to-leading order (NNLO) QCD corrections to $W^{\pm}Z$ production in proton collisions. We consider both the inclusive production of on-shell $W^{\pm}Z$ pairs at LHC energies and the total $W^{\pm}Z$ rates including off-shell effects of the $W$ and $Z$ bosons. In the off-shell computation, the invariant mass of the lepton pairs from the $Z$ boson decay is required to be in a given mass window, and the results are compared with the corresponding measurements obtained by the ATLAS and CMS collaborations. The NNLO corrections range from 8% at $\sqrt{s}$=7 TeV to 11% at $\sqrt{s}$=14 TeV and significantly improve the agreement with the LHC data at $\sqrt{s}$=7 and 8 TeV
Coxsackie and Adenovirus Receptor Is a Modifier of Cardiac Conduction and Arrhythmia Vulnerability in the Setting of Myocardial Ischemia

ObjectivesThe aim of this study was to investigate the modulatory effect of the coxsackie and adenovirus receptor (CAR) on ventricular conduction and arrhythmia vulnerability in the setting of myocardial ischemia.BackgroundA heritable component in the risk of ventricular fibrillation during myocardial infarction has been well established. A recent genome-wide association study of ventricular fibrillation during acute myocardial infarction led to the identification of a locus on chromosome 21q21 (rs2824292) in the vicinity of the CXADR gene. CXADR encodes the CAR, a cell adhesion molecule predominantly located at the intercalated disks of the cardiomyocyte.MethodsThe correlation between CAR transcript levels and rs2824292 genotype was investigated in human left ventricular samples. Electrophysiological studies and molecular analyses were performed using CAR haploinsufficient (CAR+/−) mice.ResultsIn human left ventricular samples, the risk allele at the chr21q21 genome-wide association study locus was associated with lower CXADR messenger ribonucleic acid levels, suggesting that decreased cardiac levels of CAR predispose to ischemia-induced ventricular fibrillation. Hearts from CAR+/− mice displayed slowing of ventricular conduction in addition to an earlier onset of ventricular arrhythmias during the early phase of acute myocardial ischemia after ligation of the left anterior descending artery. Expression and distribution of connexin 43 were unaffected, but CAR+/− hearts displayed increased arrhythmia susceptibility on pharmacological electrical uncoupling. Patch-clamp analysis of isolated CAR+/− myocytes showed reduced sodium current magnitude specifically at the intercalated disk. Moreover, CAR coprecipitated with NaV1.5 in vitro, suggesting that CAR affects sodium channel function through a physical interaction with NaV1.5.ConclusionsCAR is a novel modifier of ventricular conduction and arrhythmia vulnerability in the setting of myocardial ischemia. Genetic determinants of arrhythmia susceptibility (such as CAR) may constitute future targets for risk stratification of potentially lethal ventricular arrhythmias in patients with coronary artery disease
Bacterioplankton and phytoplankton production in seven lakes in the Middle Rio Doce basin, south-east Brazil

AbstractThe purpose of this study was to measure the phytoplankton production (PP) and bacterial production (BP) simultaneously in seven lakes in the middle Rio Doce basin (southeast Brazil) during the dry and the rainy seasons. Limnological monitoring was conducted from 1999 to 2001 as well as both PP (radioactive carbon fixation) and BP (3H-Leucine incorporation) in four specific depths (100%, 10%, 1% of incident radiation, and aphotic zone). Furthermore, trophic state of the lakes was analyzed, considering the index proposed by Salas and Martino (1991) and Carlson (1977). In general, some parameters increased during the rainy season such as pH, conductivity, chlorophyll and total nitrogen. In the period of 1999/2000, the rain caused PP reduction in the lakes, excepting Carioca and Águas Claras Lake, but in the years 2000/2001, the lakes did not show a similar pattern. In contrast, the rainy season of both years caused an expressive bacterioplankton production enhancing. Using Salas and Martino index, we observed that some lakes were affected by the seasonal runoff, therefore the typologie of these lakes changed from oligotrophic to mesotrophic conditions, otherwise considering the Carlson index all lakes were classified as eutrophic in both dry and rainy seasons. Indeed, Salas and Martino index demonstrated to be more appropriate to determine the trophic status of the lakes. Finally, our data indicate that until now, in spite of the lakes location, protected and unprotected area, the lakes still maintain their natural characteristics
Partitions versus sets: A case of duality

AbstractIn a recent paper, Amini et al. introduced a general framework to prove duality theorems between tree-decompositions and their dual combinatorial object. They unify all known ad hoc proofs in one duality theorem based on submodular partition functions. This general theorem remains however a bit technical and relies on this particular submodularity property. Instead of partition functions, we propose here a simple combinatorial property of a set of partitions which also gives these duality results. Our approach is both simpler, and a little bit more general
Nonparametric estimation for pure jump Lévy processes based on high frequency data

AbstractIn this paper, we study nonparametric estimation of the Lévy density for pure jump Lévy processes. We consider n discrete time observations with step Δ. The asymptotic framework is: n tends to infinity, Δ=Δn tends to zero while nΔn tends to infinity. First, we use a Fourier approach (“frequency domain”): this allows us to construct an adaptive nonparametric estimator and to provide a bound for the global L2-risk. Second, we use a direct approach (“time domain”) which allows us to construct an estimator on a given compact interval. We provide a bound for L2-risk restricted to the compact interval. We discuss rates of convergence and give examples and simulation results for processes fitting in our framework
Analyzing logic programs using “prop”-ositional logic programs and a magic wand

AbstractThis paper illustrates the role of a class of “prop”-ositional logic programs in the analysis of complex properties of logic programs. Analyses are performed by abstracting Prolog programs to corresponding “prop”-ositional logic programs which approximate the original programs and have finite meanings. We focus on a groundness analysis which is equivalent to that obtained by abstract interpretation using the domain Prop. The main contribution is in the ease in which a highly efficient implementation of the analysis is obtained. The implementation is bottom-up and provides approximations of a program's success patterns. Goal-dependent information such as call patterns is obtained using a magic-set transformation. A novel compositional approach is applied so that call patterns for arbitrary goals are derived in a precise and efficient way
Search for TeV-scale gravity signatures in final states with leptons and jets with the ATLAS detector at s=7 TeV

AbstractThe production of events with multiple high transverse momentum particles including charged leptons and jets is measured, using 1.04 fb−1 of proton–proton collision data recorded by the ATLAS detector during the first half of 2011 at s=7 TeV. No excess beyond Standard Model expectations is observed, and upper limits on the fiducial cross sections for non-Standard Model production of these final states are set. Using models for string ball and black hole production and decay, exclusion contours are determined as a function of mass threshold and the fundamental gravity scale
Dark matter and muon (g−2) in local U(1)Lμ−Lτ-extended Ma model

AbstractWe consider right-handed neutrino dark matter N1 in local U(1)Lμ−Lτ-extended Ma model. With the light U(1)μ−τ gauge boson (mZ′∼O(100) MeV) and small U(1)μ−τ gauge coupling (gZ′∼10−4–10−3) which can accommodate the muon (g−2) anomaly and is still allowed by other experimental constraints, we show that we can get correct relic density of dark matter for wide range of dark matter mass (M1∼10–200 GeV), although the gauge coupling constant gZ′ is small. This is due to the fact that the annihilation cross section of dark matter pair is enhanced by M14/mZ′4 in the processes N1N1→Z′Z′ or N1N1→Z′H2. We also consider the constraints from direct detection, collider searches
The impact of energy conservation in transport models on the π−/π+ multiplicity ratio in heavy-ion collisions and the symmetry energy

AbstractThe charged pion multiplicity ratio in intermediate energy central heavy-ion collisions has been proposed as a suitable observable to constrain the high density dependence of the isovector part of the equation of state. A comparison of various transport model predictions with existing experimental data has led, however, to contradictory results. Using an upgraded version of the Tübingen QMD transport model, which allows the conservation of energy at a local or global level by accounting for the potential energy of hadrons in two-body collisions and leading thus to particle production threshold shifts, we demonstrate that compatible constraints for the symmetry energy stiffness can be extracted from pion multiplicity and elliptic flow observables. However, pion multiplicities and ratios are proven to be highly sensitive to the yet unknown isovector part of the in-medium Δ(1232) potential which hinders, at present, the extraction of meaningful information on the high density dependence of the symmetry energy. A solution to this problem together with the inclusion of contributions presently neglected, such as in-medium pion potentials and retardation effects, are needed for a final verdict on this topic
Enhanced thj signal at the LHC with h→γγ decay and CP-violating top–Higgs coupling

AbstractWe study the observability of non-standard top Yukawa couplings in the pp→t(→ℓνℓb)h(→γγ)j channel at 14 TeV high-luminosity LHC (HL-LHC). The small diphoton branching ratio is enhanced when the CP-violating phase, ξ, of the top–Higgs interaction is non-zero. When the modulus of the top–Higgs interaction assumes the SM value, yt=ytSM, we find that the signal significance reaches 2.7σ (7.7σ) when ξ=0.25π (0.5π). Furthermore, the different couplings modify the polarisation of the top quark, and can subsequently be distinguished via asymmetries in spin correlations with the final state leptons. The diphoton decay mode is found to be significantly more promising than the previously considered pp→t(→ℓνℓb)h(→bb¯)j channel
Ks0Ks0 correlations in pp collisions at s=7 TeV from the LHC ALICE experiment

AbstractIdentical neutral kaon pair correlations are measured in s=7 TeV pp collisions in the ALICE experiment. One-dimensional Ks0Ks0 correlation functions in terms of the invariant momentum difference of kaon pairs are formed in two multiplicity and two transverse momentum ranges. The femtoscopic parameters for the radius and correlation strength of the kaon source are extracted. The fit includes quantum statistics and final-state interactions of the a0/f0 resonance. Ks0Ks0 correlations show an increase in radius for increasing multiplicity and a slight decrease in radius for increasing transverse mass, mT, as seen in ππ correlations in pp collisions and in heavy-ion collisions. Transverse mass scaling is observed between the Ks0Ks0 and ππ radii. Also, the first observation is made of the decay of the f2′(1525) meson into the Ks0Ks0 channel in pp collisions
Measurement of the charge asymmetry in top-quark pair production in proton–proton collisions at s=7 TeV

AbstractThe difference in angular distributions between top quarks and antiquarks, commonly referred to as the charge asymmetry, is measured in pp collisions at the LHC with the CMS experiment. The data sample corresponds to an integrated luminosity of 1.09 fb−1 at a centre-of-mass energy of 7 TeV. Top-quark pairs are selected in the final state with an electron or muon and four or more jets. At least one jet is identified as originating from b-quark hadronization. The charge asymmetry is measured in two variables, one based on the pseudorapidities (η) of the top quarks and the other on their rapidities (y). The results ACη=−0.017±0.032 (stat.)−0.036+0.025(syst.) and ACy=−0.013±0.028 (stat.)−0.031+0.029(syst.) are consistent within uncertainties with the standard-model predictions
On the possibility of dark energy from corrections to the Wheeler–DeWitt equation

AbstractWe present a method for approximating the effective consequence of generic quantum gravity corrections to the Wheeler–DeWitt equation. We show that in many cases these corrections can produce departures from classical physics at large scales and that this behaviour can be interpreted as additional matter components. This opens up the possibility that dark energy (and possible dark matter) could be large scale manifestations of quantum gravity corrections to classical general relativity. As a specific example we examine the first order corrections to the Wheeler–DeWitt equation arising from loop quantum cosmology in the absence of lattice refinement and show how the ultimate breakdown in large scale physics occurs
On the efficient evaluation of ruin probabilities for completely monotone claim distributions

AbstractIn this paper we propose a highly accurate approximation procedure for ruin probabilities in the classical collective risk model, which is based on a quadrature/rational approximation procedure proposed in [2]. For a certain class of claim size distributions (which contains the completely monotone distributions) we give a theoretical justification for the method. We also show that under weaker assumptions on the claim size distribution, the method may still perform reasonably well in some cases. This in particular provides an efficient alternative to a related method proposed in [3]. A number of numerical illustrations for the performance of this procedure is provided for both completely monotone and other types of random variables
Redox Signaling by the RNA Polymerase III TFIIB-Related Factor Brf2

SummaryTFIIB-related factor 2 (Brf2) is a member of the family of TFIIB-like core transcription factors. Brf2 recruits RNA polymerase (Pol) III to type III gene-external promoters, including the U6 spliceosomal RNA and selenocysteine tRNA genes. Found only in vertebrates, Brf2 has been linked to tumorigenesis but the underlying mechanisms remain elusive. We have solved crystal structures of a human Brf2-TBP complex bound to natural promoters, obtaining a detailed view of the molecular interactions occurring at Brf2-dependent Pol III promoters and highlighting the general structural and functional conservation of human Pol II and Pol III pre-initiation complexes. Surprisingly, our structural and functional studies unravel a Brf2 redox-sensing module capable of specifically regulating Pol III transcriptional output in living cells. Furthermore, we establish Brf2 as a central redox-sensing transcription factor involved in the oxidative stress pathway and provide a mechanistic model for Brf2 genetic activation in lung and breast cancer
Bub1 Maintains Centromeric Cohesion by Activation of the Spindle Checkpoint

SummaryBub1 is a component of the spindle assembly checkpoint (SAC), a surveillance mechanism that ensures genome stability by delaying anaphase until all the chromosomes are stably attached to spindle microtubules via their kinetochores. To define Bub1's role in chromosome segregation, embryogenesis, and tissue homeostasis, we generated a mouse strain in which BUB1 can be inactivated by administration of tamoxifen, thereby bypassing the preimplantation lethality associated with the Bub1 null phenotype. We show that Bub1 is essential for postimplantation embryogenesis and proliferation of primary embryonic fibroblasts. Bub1 inactivation in adult males inhibits proliferation in seminiferous tubules, reducing sperm production and causing infertility. In culture, Bub1-deficient fibroblasts fail to align their chromosomes or sustain SAC function, yielding a highly aberrant mitosis that prevents further cell divisions. Centromeres in Bub1-deficient cells also separate prematurely; however, we show that this is a consequence of SAC dysfunction rather than a direct role for Bub1 in protecting centromeric cohesion
Quasilocal conservation laws from semicyclic irreducible representations of Uq(sl2) in XXZ spin-1/2 chains

AbstractWe construct quasilocal conserved charges in the gapless (|Δ|≤1) regime of the Heisenberg XXZ spin-1/2 chain, using semicyclic irreducible representations of Uq(sl2). These representations are characterized by a periodic action of ladder operators, which act as generators of the aforementioned algebra. Unlike previously constructed conserved charges, the new ones do not preserve magnetization, i.e. they do not possess the U(1) symmetry of the Hamiltonian. The possibility of application in relaxation dynamics resulting from U(1)-breaking quantum quenches is discussed
Upper bounds on ATSP neighborhood size

AbstractWe consider the Asymmetric Traveling Salesman Problem (ATSP) and use the definition of neighborhood by Deineko and Woeginger (see Math. Programming 87 (2000) 519–542). Let μ(n) be the maximum cardinality of polynomial time searchable neighborhood for the ATSP on n vertices. Deineko and Woeginger conjectured that μ(n)<β(n−1)! for any constant β>0 provided P≠NP. We prove that μ(n)<β(n−k)! for any fixed integer k⩾1 and constant β>0 provided NP⊈P/poly, which (like P≠NP) is believed to be true. We also give upper bounds for the size of an ATSP neighborhood depending on its search time
p53 polymorphism influences response in cancer chemotherapy via modulation of p73-dependent apoptosis

AbstractIntact p73 function is shown to be an important determinant of cellular sensitivity to anticancer agents. Inhibition of p73 function by dominant-negative proteins or by mutant p53 abrogates apoptosis and cytotoxicity induced by these agents. A polymorphism encoding either arginine (72R) or proline (72P) at codon 72 of p53 influences inhibition of p73 by a range of p53 mutants identified in squamous cancers. Clinical response following cisplatin-based chemo-radiotherapy for advanced head and neck cancer is influenced by this polymorphism, cancers expressing 72R mutants having lower response rates than those expressing 72P mutants. Polymorphism in p53 may influence individual responsiveness to cancer therapy
IR fixed points in SU(3) gauge theories

AbstractWe propose a novel RG method to specify the location of the IR fixed point in lattice gauge theories and apply it to the SU(3) gauge theories with Nf fundamental fermions. It is based on the scaling behavior of the propagator through the RG analysis with a finite IR cutoff, which we cannot remove in the conformal field theories in sharp contrast to the confining theories. The method also enables us to estimate the anomalous mass dimension in the continuum limit at the IR fixed point. We perform the program for Nf=16,12,8 and Nf=7 and indeed identify the location of the IR fixed points in all cases
Bottomonium and Drell–Yan production in p–A collisions at 450 GeV

AbstractThe NA50 Collaboration has measured heavy-quarkonium production in p–A collisions at 450 GeV incident energy (s=29.1 GeV). We report here results on the production of the ϒ states and of high-mass Drell–Yan muon pairs (mμμ>6 GeV/c2). The cross-section at midrapidity and the A-dependence of the measured yields are determined and compared with the results of other fixed-target experiments and with the available theoretical estimates. Finally, we also address some issues concerning the transverse momentum distributions of the measured dimuons
Tachyon kinks on non-BPS D-branes

AbstractWe consider solitonic solutions of the DBI tachyon effective action for a non-BPS brane. When wrapped on a circle, these solutions are regular and have a finite energy. We show that in the decompactified limit, these solitons give Sen's infinitely thin finite energy kink—interpreted as a BPS brane—provided that some conditions on the potential hold. In particular, if for large T the potential is exponential, V=e−Ta, then Sen's solution is only found for a<1. For power-law potentials V=1/Tb, one must have b>1. If these conditions are not satisfied, we show that the lowest energy configuration is the unstable tachyon vacuum with no kinks. We examine the stability of the solitons and the spectrum of small perturbations
Super-renormalizable or finite Lee–Wick quantum gravity

AbstractWe propose a class of multidimensional higher derivative theories of gravity without extra real degrees of freedom besides the graviton field. The propagator shows up the usual real graviton pole in k2=0 and extra complex conjugates poles that do not contribute to the absorptive part of the physical scattering amplitudes. Indeed, they may consistently be excluded from the asymptotic observable states of the theory making use of the Lee–Wick and Cutkosky, Landshoff, Olive and Polkinghorne prescription for the construction of a unitary S-matrix. Therefore, the spectrum consists of the graviton and short lived elementary unstable particles that we named “anti-gravitons” because of their repulsive contribution to the gravitational potential at short distance. However, another interpretation of the complex conjugate pairs is proposed based on the Calmet's suggestion, i.e. they could be understood as black hole precursors long established in the classical theory. Since the theory is CPT invariant, the conjugate complex of the micro black hole precursor can be interpreted as a white hole precursor consistently with the 't Hooft complementarity principle. It is proved that the quantum theory is super-renormalizable in even dimension, i.e. only a finite number of divergent diagrams survive, and finite in odd dimension. Furthermore, turning on a local potential of the Riemann tensor we can make the theory finite in any dimension. The singularity-free Newtonian gravitational potential is explicitly computed for a range of higher derivative theories. Finally, we propose a new super-renormalizable or finite Lee–Wick standard model of particle physics