cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Integrated Cosmological Probes: Extended Analysis
Creators: name: Nicola, Andrina
name: Refregier, Alexandre
name: Amara, Adam
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Recent progress in cosmology has relied on combining different cosmological probes. In earlier work, we implemented an integrated approach to cosmology where the probes are combined into a common framework at the map level. This has the advantage of taking full account of the correlations between the different probes, to provide a stringent test of systematics and of the validity of the cosmological model. We extend this analysis to include not only CMB temperature, galaxy clustering, weak lensing from SDSS but also CMB lensing, weak lensing from the DES SV survey, Type Ia SNe and $H_{0}$ measurements. This yields 12 auto- and cross-power spectra as well as background probes. Furthermore, we extend the treatment of systematic uncertainties. For $Λ$CDM, we find results that are consistent with our earlier work. Given our enlarged data set and systematics treatment, this confirms the robustness of our analysis and results. Furthermore, we find that our best-fit cosmological model gives a good fit to the data we consider with no signs of tensions within our analysis. We also find our constraints to be consistent with those found by WMAP9, SPT and ACT and the KiDS weak lensing survey. Comparing with the Planck Collaboration results, we see a broad agreement, but there are indications of a tension from the marginalized constraints in most pairs of cosmological parameters. Since our analysis includes CMB temperature Planck data at $10 < \ell < 610$, the tension appears to arise between the Planck high$-\ell$ and the other measurements. Furthermore, we find the constraints on the probe calibration parameters to be in agreement with expectations, showing that the data sets are mutually consistent. In particular, this yields a confirmation of the amplitude calibration of the weak lensing measurements from SDSS, DES SV and Planck CMB lensing from our integrated analysis. [abridged]
description: 30 pages, 19 figures, 3 tables, updated following referee's comments, to appear in PRD
Nuclear final-state interactions in deep inelastic scattering off the lightest nuclei
Creators: name: Cosyn, W.
name: Sargsian, M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We review recent progress in studies of nuclear final-state interactions in deep inelastic scattering (DIS) off the lightest nuclei tagged by a recoil nucleon. These processes hold a lot of potential for resolving the outstanding issues related to the dynamics of hadronization in QCD. Within the minimal Fock component framework, valid at large Bjorken $x$, the main features of the theoretical approach based on the virtual nucleon approximation are elaborated. In this approach, the strong final-state interaction of the DIS products with the nuclear fragments is described by an effective eikonal amplitude, whose parameters can be extracted from the analysis of semi-inclusive DIS off the deuteron target. The extraction of the $Q^2$ and $W$ mass dependences of these parameters gives a new observable in studying the QCD structure of DIS final states. Another important feature of tagged DIS off the lightest nuclei is the possibility of performing pole extrapolation with a high degree of accuracy. Such extrapolation allows an extraction of the neutron structure function in a model independent way due to suppression of the final-state interaction in the on-shell limit of the struck nucleon propagator. We review the first application of the pole extrapolation to recent experimental data. Finally, we outline the extension of the framework to inclusive DIS, including a polarized deuteron target as well as its application to the tagged DIS reactions for future experiments at fixed target and collider energies.
description: 36 pages, final version accepted in Int. J. Mod. Phys. E. Minor changes in the text
Statistical mechanics of phase-space partitioning in large-scale spiking neuron circuits
Creators: name: Touzel, Maximilian Puelma
name: Wolf, Fred
Publisher: name: arXiv
Year: 2017
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Chaotic Dynamics (nlin.CD)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Synaptic interactions structure the phase space of the dynamics of neural circuits and constrain neural computation. Understanding how requires methods that handle those discrete interactions, yet few exist. Recently, it was discovered that even random networks exhibit dynamics that partitions the phase space into numerous attractor basins. Here we utilize this phenomenon to develop theory for the geometry of phase space partitioning in spiking neural circuits. We find basin boundaries structuring the phase space are pre-images of spike-time collision events. Formulating a statistical theory of spike-time collision events, we derive expressions for the rate of divergence of neighboring basins and for their size distribution. This theory reveals that the typical basin diameter grows with inhibitory coupling strength and shrinks with the rate of spike events. Our study provides an analytical and generalizable approach for dissecting how connectivity, coupling strength, single neuron dynamics and population activity shape the phase space geometry of spiking circuits.
description: manuscript(16 pages, 5 figures)
Cyclic cosmology in modified gravity
Creators: name: Pavlovic, Petar
name: Sossich, Marko
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work we propose a new general model of eternal cyclic Universe. We start from the assumption that quantum gravity corrections can be effectively accounted by the addition of higher order curvature terms in the Lagrangian density for gravity. It is also taken into account that coefficients associated with these curvature corrections will in general be dependent on a curvature regime. We therewith assume no new ingredients, such as extra dimensions, new scalar fields, phantom energy or special space-time geometries. Evolution of the Universe in this framework is studied and general properties of each phase of the cycle - cosmological bounce, low curvature ($Λ$CDM) phase, destruction of bounded systems and contracting phase - are analysed in detail. Focusing on some simple special cases, we obtain analytical and numerical solutions for the each phase confirming our analysis.
description: 33 pages, 11 figures
Anomalies in (semi)-leptonic $B$ decays $B^{\pm} \to τ^{\pm} ν$, $B^{\pm} \to D τ^{\pm} ν$ and $B^{\pm} \to D^* τ^{\pm} ν$, and possible resolution with sterile neutrino
Creators: name: Cvetič, G.
name: Halzen, Francis
name: Kim, C. S.
name: Oh, Sechul
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The universality of the weak interactions can be tested in semileptonic $b \to c$ transitions, and in particular in the ratios $R(D^{(*)}) \equiv Γ(B \rightarrow D^{(*)} τν)/Γ(B \rightarrow D^{(*)} \ell ν)$ (where $\ell = μ$ or $e$). Due to the recent differences between the experimental measurements of these observables by BaBar, Belle and LHCb on the one hand and the Standard Model predicted values on the other hand, we study the predicted ratios $R(D^{(*)}) = Γ(B \rightarrow D^{(*)} τ+$ "missing" $)/Γ(B \rightarrow D^{(*)} \ell ν)$ in scenarios with an additional sterile heavy neutrino of mass $\sim 1$ GeV. Further, we evaluate the newly defined ratio $R(0) \equiv Γ(B \to τ+$ "missing" $)/Γ(B \to μν)$ in such scenarios, in view of the future possibilities of measuring the quantity at Belle-II.
description: 17 pages, 6 figures, 3 tables, to appear in Chinese Physics C
Diffusion dynamics and synchronizability of hierarchical products of networks
Creators: name: Skardal, Per Sebastian
Publisher: name: arXiv
Year: 2017
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: The hierarchical product of networks represents a natural tool for building large networks out of two smaller subnetworks: a primary subnetwork and a secondary subnetwork. Here we study the dynamics of diffusion and synchronization processes on hierarchical products. We apply techniques previously used for approximating the eigenvalues of the adjacency matrix to the Laplacian matrix, allowing us to quantify the effects that the primary and secondary subnetworks have on diffusion and synchronization in terms of a coupling parameter that weighs the secondary subnetwork relative to the primary subnetwork. Diffusion processes are separated into two regimes: for small coupling the diffusion rate is determined by the structure of the secondary network, scaling with the coupling parameter, while for large coupling it is determined by the primary network and saturates. Synchronization, on the other hand, is separated into three regimes: for both small and large coupling hierarchical products have poorly synchronization properties, but is optimized at an intermediate value. Moreover, the critical coupling value that optimizes synchronization is shaped by the relative connectivities of the primary and secondary subnetworks, compensating for significant differences between the two subnetworks.
Performance of Particle Swarm Optimization on the fully-coherent all-sky search for gravitational waves from compact binary coalescences
Creators: name: Weerathunga, Thilina S.
name: Mohanty, Soumya D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Fully-coherent all-sky search for gravitational wave (GW) signals from the coalescence of compact object binaries is a computationally expensive task. Approximations, such as semi-coherent coincidence searches, are currently used to circumvent the computational barrier with a concomitant loss in sensitivity. We explore the effectiveness of Particle Swarm Optimization (PSO) in addressing this problem. Our results, using a simulated network of detectors with initial LIGO design sensitivities and a realistic signal strength, show that PSO can successfully deliver a fully-coherent all-sky search with < 1/10 the number of likelihood evaluations needed for a grid-based search.
description: 14 pages, 8 figures, Corrected typos, Eq. 40 has been corrected
An effective formalism for testing extensions to General Relativity with gravitational waves
Creators: name: Endlich, Solomon
name: Gorbenko, Victor
name: Huang, Junwu
name: Senatore, Leonardo
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The recent direct observation of gravitational waves (GW) from merging black holes opens up the possibility of exploring the theory of gravity in the strong regime at an unprecedented level. It is therefore interesting to explore which extensions to General Relativity (GR) could be detected. We construct an Effective Field Theory (EFT) satisfying the following requirements. It is testable with GW observations; it is consistent with other experiments, including short distance tests of GR; it agrees with widely accepted principles of physics, such as locality, causality and unitarity; and it does not involve new light degrees of freedom. The most general theory satisfying these requirements corresponds to adding to the GR Lagrangian operators constructed out of powers of the Riemann tensor, suppressed by a scale comparable to the curvature of the observed merging binaries. The presence of these operators modifies the gravitational potential between the compact objects, as well as their effective mass and current quadrupoles, ultimately correcting the waveform of the emitted GW.
description: v1: 43+16 pages, 11 figures, 2 tables; v2: minor corrections; v3: minor corrections, JHEP published version
On the persistence of polar domains in ultrathin ferroelectric capacitors
Creators: name: Zubko, Pavlo
name: Lu, Haidong
name: Bark, Chung-Wung
name: Martí, Xavi
name: Santiso, José
name: Eom, Chang-Beom
name: Catalan, Gustau
name: Gruverman, Alexei
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The instability of ferroelectric ordering in ultra-thin films is one of the most important fundamental issues pertaining realization of a number of electronic devices with enhanced functionality, such as ferroelectric and multiferroic tunnel junctions or ferroelectric field effect transistors. In this paper, we investigate the polarization state of archetypal ultrathin (several nanometres) ferroelectric heterostructures: epitaxial single-crystalline BaTiO$_3$ films sandwiched between the most habitual perovskite electrodes, SrRuO$_3$, on top of the most used perovskite substrate, SrTiO$_3$. We use a combination of piezoresponse force microscopy, dielectric measurements and structural characterization to provide conclusive evidence for the ferroelectric nature of the relaxed polarization state in ultrathin BaTiO$_3$ capacitors. We show that even the high screening efficiency of SrRuO$_3$ electrodes is still insufficient to stabilize polarization in SrRuO$_3$/BaTiO$_3$/SrRuO$_3$ heterostructures at room temperature. We identify the key role of domain wall motion in determining the macroscopic electrical properties of ultrathin capacitors and discuss their dielectric response in the light of the recent interest in negative capacitance behaviour.
description: 13 pages, 4 figures
Water challenges in socio-ecological systems: is human decision-making accounted for in the analysis of climate change adaptation options?
Creators: name: Zanini, Sara
name: Zanini, Sara
Publisher: name: Unknown
Year: 2023
Subjects: subject: Resource /Energy Economics and Policy
subject: human behaviour
subject: decision-making process
subject: climate change adaptation
subject: water resources

description: This mixed-method systematic review is motivated by the willingness to identify the efforts of the most recent developments of the literature on the understanding of water challenges in socioecological systems, particularly coastal ones. The attention, in the exercise, is directed at the analysis of individual and collective decision-making processes concerning the use of the environmental good. This is because ultimately, if it is true that water resources are affected by external trends and shocks, it is also relevant how distinct paths of local and regional level responses impact on resource status. The inquiry, departs from a conceptual point of view mainly pinpointing scholars’ already proposed method- ological solutions for the concern, being them mostly participatory modelling excercises, bayesian net- work analyses, multi-agent games and experiments and finally integrated assessment models. Even if methodological tools with a potential to explicitly represent human decision-making coupled with its connection with the natural environment do exist, these methods are found to be relatively superficially articulated in interdisciplinary water management analyses. Particularly, the study explores to what extent is the human behaviour, in relation to water resources, included into the extant analyses.
TRANSIENT STABILITY RESPONSE OF HYDRO-WIND BASED OF POWER SYSTEM NETWORK [CASE STUDY ON KOKA, AWASH-II AND ADAMA-I POWER PLANTS]
Creators: name: KERAJ ALEMU DEBELA
Publisher: name: Zenodo
Year: 2020

description: TRANSIENT STABILITY RESPONSE OF HYDRO-WIND 

BASED OF POWER SYSTEM NETWORK [CASE STUDY 

ON KOKA, AWASH-II AND ADAMA-I POWER 

PLANTS]
EGUP corrected thermodynamics of RN-AdS black hole with quintessence matter
Creators: name: Tan, BaoYu
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Reissner-Nordstrom anti de Sitter (RN-AdS) black hole, characterized by electric charge and negative cosmological constant,exhibits a rich thermodynamics structure. In this paper, we consider the influence of quintessence, a hypothetical dark energy component with negative pressure. we have computed the extended generalized uncertainty principle (EGUP) corrections to the thermodynamics of RN-AdS black hole, including Hawking temperature, heat capacity, entropy function and pressure. Furthermore, as a special case of EGUP, we have computed and compared the result obtained from the generalized uncertainty principle (GUP) with those from the extended uncertainty principle (EUP). This work contributes to the understanding of the interplay between fundamental physics and the macroscopic properties of black holes, offering a novel perspective on the thermodynamics of RN-AdS black holes in the context of quintessence and quantum gravity corrections. More importantly, we found that, unlike in the case of the Reissner-Nordstrom (RN) black hole, the qualitative behavior for the RN-AdS black hole with quintessence remain largely unchanged, except for minor differences, at the equation of state parameters w=-1/3 and w=-2/3. In addition , unlike RN black holes, the phase transition point of RN-AdS black holes shift to almost zero.
Mapping the Milky Way with LAMOST I: Method and overview
Creators: name: Liu, Chao
name: Xu, Yan
name: Wan, Jun-Chen
name: Wang, Hai-Feng
name: Carlin, Jeffrey L.
name: Deng, Li-Cai
name: Newberg, Heidi Jo
name: Cao, Zihuang
name: Hou, Yonghui
name: Wang, Yuefei
name: Zhang, Yong
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a statistical method to derive the stellar density profiles of the Milky Way from spectroscopic survey data, taking into account selection effects. We assume that the selection function of the spectroscopic survey is based on photometric colors and magnitudes and possibly altered during observations and data reductions. Then the underlying selection function for a line-of-sight can be well recovered by comparing the distribution of the spectroscopic stars in a color-magnitude plane with that of the photometric dataset. Subsequently, the stellar density profile along a line-of-sight can be derived from the spectroscopically measured stellar density profile multiplied by the selection function. The method is validated using Galaxia mock data with two different selection functions. We demonstrate that the derived stellar density profiles well reconstruct the true ones not only for the full targets, but also for the sub-populations selected from the full dataset. Finally, the method is applied to map the density profiles for the Galactic disk and halo, respectively, using the LAMOST RGB stars. The Galactic disk extends to about R=19 kpc, where the disk still contributes about 10% to the total stellar surface density. Beyond this radius, the disk smoothly transitions to the halo without any truncation, bending, or broken. Moreover, no over-density corresponding to the Monoceros ring is found in the Galactic anti-center direction. The disk shows moderate north-south asymmetry at radii larger than 12 kpc. On the other hand, the R-Z tomographic map directly shows that the stellar halo is substantially oblate within a Galactocentric radius of 20 kpc and gradually becomes nearly spherical beyond 30 kpc.
description: 27 pages, 18 figures, accepted by Research in Astronomy and Astrophysics
MS Gr. class. c. 6 1528
Creators: name: Oxford Papyrology
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 470316
subject: Latin and classical Greek languages

description: P.Herc. 1674 col. 49. Philodemus, De rhetorica 2
Drawing by G.B. Malesci
Frequency measurement of the clock transition of an indium ion sympathetically-cooled in a linear trap
Creators: name: Ohtsubo, Nozomi
name: Li, Ying
name: Matsubara, Kensuke
name: Ido, Tetsuya
name: Hayasaka, Kazuhiro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report frequency measurement of the clock transition in an 115In+ ion sympathetically-cooled with Ca+ ions in a linear rf trap. The Ca+ ions are used as a probe of the external electromagnetic field and as the coolant for preparing the cold In+. The frequency is determined to be 1 267 402 452 901 049.9 (6.9) Hz by averaging 36 measurements using an optical frequency comb referenced to the frequency standards located in the same site.
Algebraic Laws for Weak Consistency (Extended Version)
Creators: name: Cerone, Andrea
name: Gotsman, Alexey
name: Yang, Hongseok
Publisher: name: arXiv
Year: 2017
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: C.2.4

description: Modern distributed systems often rely on so called weakly-consistent databases, which achieve scalability by sacrificing the consistency guarantee of distributed transaction processing. Such databases have been formalised in two different styles, one based on abstract executions and the other based on dependency graphs. The choice between these styles has been made according to intended applications: the former has been used to specify and verify the implementation of these databases, and the latter to prove properties of programs running on top of the databases. In this paper, we present a set of novel algebraic laws (i.e. inequations) that connect these two styles of specifications; the laws relate binary relations used in a specification based on abstract executions, to those used in a specification based on dependency graphs. We then show that this algebraic connection gives rise to so called robustness criteria, conditions which ensures that a program running on top of a weakly-consistent database does not exhibit anomalous behaviours due to this weak consistency. These criteria make it easy to reason about programs running on top of these databases, and may become a basis for dynamic or static program analyses. For a certain class of consistency models specifications, we prove a full abstraction result that connects the two styles of specifications.
description: Extended Version of the CONCUR'17 paper
Orbital dynamics in galactic potentials under mass transfer
Creators: name: Illés, Eduárd
name: Jánosi, Dániel
name: Kovács, Tamás
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Time-dependent potentials are common in galactic systems that undergo significant evolution, interactions, or encounters with other galaxies, or when there are dynamic processes like star formation and merging events. Recent studies show that an ensemble approach along with the so-called snapshot framework in dynamical system theory provide a powerful tool to analyze time dependent dynamics.
 In this work, we aim to explore and quantify the phase space structure and dynamical complexity in time-dependent galactic potentials consisting of multiple components. We apply the classical method of Poincaré-surface of section to analyze the phase space structure in a chaotic Hamiltonian system subjected to parameter drift. This, however, makes sense only when the evolution of a large ensemble of initial conditions is followed. Numerical simulations explore the phase space structure of such ensembles while the system undergoes a continuous parameter change. The pair-wise average distance of ensemble members allows us to define a generalized Lyapunov-exponent, that might also be time dependent, to describe the system stability. We provide a comprehensive dynamical analysis of the system under circumstances where linear mass transfer occurs between the disk and bulge components of the model.
description: 13 pages, 13 figures (including the Appendix). Corrected and finalized version of the manuscript published at Astronomy & Astrophysics (Official acceptance: 04/11/2024, Published online: 17/12/2024)
Purely flavor-changing Z' bosons and where they might hide
Creators: name: Foldenauer, Patrick
name: Jaeckel, Joerg
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A plethora of ultraviolet completions of the Standard Model have extra U(1) gauge symmetries. In general, the associated massive $Z^\prime$ gauge boson can mediate flavor-changing neutral current processes at tree level. We consider a situation where the $Z^\prime$ boson couples solely via flavor-changing interactions to quarks and leptons. In this scenario the model parameter space is, in general, quite well constrained by existing flavor bounds. However, we argue that cancellation effects shelter islands in parameter space from strong flavor constraints and that these can be probed by multipurpose collider experiments like ATLAS or CMS as well as LHCb in upcoming runs at the LHC. In still allowed regions of parameter space these scenarios may help to explain the current tension between theory and experiment of $(g-2)_μ$ as well as a small anomaly in $τ$ decays.
description: 44 pages, 22 figures; v2: Corrected factor of -1, updated references, improved discussion of tau decays; v3: Minor corrections, further extended discussion of tau decays
ENLIGHT RISE - Deliverable 2.7 - R&I Prize Year 3
Creators: name: ENLIGHT RISE WP2-Create synergies through R&I capacity building
Publisher: name: Zenodo
Year: 2024
Subjects: European Universities
R&I Prizes
Mobility awards
EUA

description: This is the final report on the creation and awarding of the R&I Prize in the final year of the ENLIGHT RISE programme, which also includes the lessons learnt.
Proposal for a Quantum Mechanical Test of Gravity at Millimeter Scale
Creators: name: Cheng, Yu
name: Lin, Jiadu
name: Sheng, Jie
name: Yanagida, Tsutomu T.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The experimental verification of the Newton law of gravity at small scales has been a longstanding challenge. Recently, torsion balance experiments have successfully measured gravitational force at the millimeter scale. However, testing gravity force on quantum mechanical wave function at small scales remains difficult. In this paper, we propose a novel experiment that utilizes the Josephson effect to detect the different evolution of quantum phase induced from the potential difference caused by gravity. We demonstrate that this experiment can test gravity quantum mechanically at the millimeter scale, and also has a potential to investigate the parity invariance of gravity at small scales.
description: 7 pages, 5 figures. Published in Scientific Reports
The First Eclipsing Binary Catalogue from the MOA-II database
Creators: name: Li, M. C. A.
name: Rattenbury, N. J.
name: Bond, A.
name: Sumi, T.
name: Bennett, D. P.
name: Koshimoto, N.
name: Abe, F.
name: Asakura, Y.
name: Barry, R.
name: Bhattacharya, A.
name: Donachie, M.
name: Evans, P.
name: Freeman, M.
name: Fukui, A.
name: Hirao, Y.
name: Itow, Y.
name: Ling, C. H.
name: Masuda, K.
name: Matsubara, Y.
name: Muraki, Y.
name: Nagakane, M.
name: Ohnishi, K.
name: Saito, To.
name: Sharan, A.
name: Sullivan, D. J.
name: Suzuki, D.
name: Tristram, P. J.
name: Yonehara, A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first catalogue of eclipsing binaries in two MOA fields towards the Galactic bulge, in which over 8,000 candidates, mostly contact and semi-detached binaries of periods < 1 d, were identified. In this paper, the light curves of a small number of interesting candidates including eccentric binaries, binaries with noteworthy phase modulations and eclipsing RS CVn type stars are shown as examples. In addition, we identified three triple object candidates by detecting the light-travel-time effect in their eclipse time variation curves.
description: 13 pages, 9 figures, MNRAS accepted
Statistical characterization of pulsar glitches and their potential impact on searches for continuous gravitational waves
Creators: name: Ashton, Gregory
name: Prix, Reinhard
name: Jones, David Ian
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Continuous gravitational waves from neutron stars could provide an invaluable resource to learn about their interior physics. A common search method involves matched filtering a modeled template against the noisy gravitational-wave data to find signals. This method suffers a mismatch (i.e., relative loss of the signal-to-noise ratio) if the signal deviates from the template. One possible instance in which this may occur is if the neutron star undergoes a glitch, a sudden rapid increase in the rotation frequency seen in the timing of many radio pulsars. In this work, we use a statistical characterization of the glitch rate and size in radio pulsars to estimate how often neutron star glitches would occur within the parameter space of continuous gravitational-wave searches and how much mismatch putative signals would suffer in the search due to these glitches. We find that for many previous and potential future searches continuous-wave signals have an elevated probability of undergoing one or more glitches and that these glitches will often lead to a substantial fraction of the signal-to-noise ratio being lost. This could lead to a failure to identify candidate gravitational-wave signals in the initial stages of a search and also to the false dismissal of candidates in subsequent follow-up stages.
description: 23 pages, 9 figures; published version as in Phys. Rev. D
Supergravity Contributions to Inflation in models with non-minimal coupling to gravity
Creators: name: Das, Kumar
name: Domcke, Valerie
name: Dutta, Koushik
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This paper provides a systematic study of supergravity contributions relevant for inflationary model building in Jordan frame supergravity. In this framework, canonical kinetic terms in the Jordan frame result in the separation of the Jordan frame scalar potential into a tree-level term and a supergravity contribution, which is potentially dangerous for sustaining inflation. We show that if the vacuum energy necessary for driving inflation originates dominantly from the F-term of an auxiliary field (i.e. not the inflaton), the supergravity corrections to the Jordan frame scalar potential are generically suppressed. Moreover, these supergravity contributions identically vanish if the superpotential $W$ vanishes along the inflationary trajectory. On the other hand, if the F-term associated with the inflaton dominates the vacuum energy, the supergravity contributions are generically comparable to the globally supersymmetric contributions. In addition, the non-minimal coupling to gravity inherent to Jordan frame supergravity significantly impacts the inflationary model depending on the size and sign of this coupling. We discuss the phenomenology of some representative inflationary models, and point out the relation to the recently much discussed cosmological `attractor' models.
description: 28 pages, 9 figures, minor changes in text and few references added
On function field Mordell-Lang: the semiabelian case and the socle theorem
Creators: name: Benoist, Franck
name: Bouscaren, Elisabeth
name: Pillay, Anand
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: Logic (math.LO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 03C98, 14G05, 03C45, 11G10, 12H05

description: We here aim to complete our model-theoretic account of the function field Mordell-Lang conjecture, avoiding appeal to dichotomy theorems for Zariski geometries, where we now consider the general case of semiabelian varieties. The main result is a reduction, using model-theoretic tools, of the semiabelian case to the abelian case.
description: 43 pages. Some minor corrections and clarifications were made following a referee's report
Enhancement of the upper critical field in disordered transition metal dichalcogenide monolayers
Creators: name: Ilic, Stefan
name: Meyer, Julia S.
name: Houzet, Manuel
Publisher: name: arXiv
Year: 2017
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We calculate the effect of impurities on the superconducting phase diagram of transition metal dichalcogenide monolayers in the presence of an in-plane magnetic field. Due to strong intrinsic spin-orbit coupling, the upper critical field greatly surpasses the Pauli limit at low temperatures. We find that it is insensitive to intravalley scattering and, ultimately, limited by intervalley scattering.
description: 10 pages, 8 figures
Temperature oscillations and sound waves in hadronic matter
Creators: name: Wilk, Grzegorz
name: Wlodarczyk, Zbigniew
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Recent high energy CERN LHC experiments on transverse momenta distributions of produced particles seem to show the existence of some (small but persistent) log-periodic oscillation in the ratios $R = σ_{data}\left( p_T\right)/σ_{fit}\left( p_T\right)$. We argue that they can provide us with so far unnoticed information on the production process, which can be interpreted as the presence of some kind of sound waves formed during the collision process in the bulk of the produced high density matter.
description: 5 pages, 3 figures; modified version to be published in Physica A
Development Journalism: a Prerequisite for Rural Transformation in Ebonyi State, Nigeria
Creators: name: Nwanchor, Uchenna
Publisher: name: figshare
Year: 2023
Subjects: Journalism studies
Communication studies
Media studies
Interactive media

description: In the Journalism industry, the issue of development often raises concern among communication experts and scholars on best ways to effectively utilize the powers and potentialities inherent in the mass media to engender development, particularly in the rural areas in Nigeria. This paper which is an analytical study is hinged on Development Media Theory because of its development-oriented value. Almost all sectors in the rural areas remained priority in the development agenda Such priorities should be conspicuously seen in the areas of health, education, economic, social, cultural and basic social amenities like electricity, good road networks and pipe born water. Therefore, the major thrust of this paper was to determine the utilization of the mass media to promote development that could ensure rapid rural transformation. Effective and multi-dimensional information system was found to possess the magic wand for rural development in Nigeria. The paper adopted conceptual and analytical approach which entail critical review of extant related literature on issues of development journalism in Nigeria with a view to analyzing the situation on ground and proffer solutions to some of the nagging problems. From the analysis, it was discovered that the mass media, especially local and some national outfits have not lived up to expectation in propagating development-oriented journalism that can foster rural transformation in Nigeria, despite its enormous powers when 75 Journal of Media, Communication and Languages Vol. 8 No.1 April, 2021 compared to their foreign media counterparts which put off all odds to get to the rural areas in search of rural-based news either for development purposes or to paint us in bad light.
Entropy corresponding to the interior of a Schwarzschild black hole
Creators: name: Majhi, Bibhas Ranjan
name: Samanta, Saurav
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Interior volume within the horizon of a black hole is a non-trivial concept which turns out to be very important to explain several issues in the context of quantum nature of black hole. Here we show that the entropy, contained by the {\it maximum} interior volume for massless modes, is proportional to the Bekenstein-Hawking expression. The proportionality constant is less than unity implying the horizon bears maximum entropy than that by the interior. The derivation is very systematic and free of any ambiguity. To do so the precise value of the energy of the modes, living in the interior, is derived by constraint analysis. Finally, the implications of the result are discussed.
description: Two new references and additional discussions added, to appear in Phys. Lett. B
Retrieving sinusoids from nonuniformly sampled data using recursive formulation
Creators: name: Maric, Ivan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: A heuristic procedure based on novel recursive formulation of sinusoid (RFS) and on regression with predictive least-squares (LS) enables to decompose both uniformly and nonuniformly sampled 1-d signals into a sparse set of sinusoids (SSS). An optimal SSS is found by Levenberg-Marquardt (LM) optimization of RFS parameters of near-optimal sinusoids combined with common criteria for the estimation of the number of sinusoids embedded in noise. The procedure estimates both the cardinality and the parameters of SSS. The proposed algorithm enables to identify the RFS parameters of a sinusoid from a data sequence containing only a fraction of its cycle. In extreme cases when the frequency of a sinusoid approaches zero the algorithm is able to detect a linear trend in data. Also, an irregular sampling pattern enables the algorithm to correctly reconstruct the under-sampled sinusoid. Parsimonious nature of the obtaining models opens the possibilities of using the proposed method in machine learning and in expert and intelligent systems needing analysis and simple representation of 1-d signals. The properties of the proposed algorithm are evaluated on examples of irregularly sampled artificial signals in noise and are compared with high accuracy frequency estimation algorithms based on linear prediction (LP) approach, particularly with respect to Cramer-Rao Bound (CRB).
description: 16 pages, 17 figures, Expert Systems with Applications - published
Homological dimensions of local (co)homology over commutative DG-rings
Creators: name: Shaul, Liran
Publisher: name: arXiv
Year: 2017
Subjects: subject: Commutative Algebra (math.AC)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 13D05, 13D45, 13B35, 16E45

description: Let $A$ be a commutative noetherian ring, let $\mathfrak{a}\subseteq A$ be an ideal, and let $I$ be an injective $A$-module. A basic result in the structure theory of injective modules states that the $A$-module $Γ_{\mathfrak{a}}(I)$ consisting of $\mathfrak{a}$-torsion elements is also an injective $A$-module. Recently, de Jong proved a dual result: If $F$ is a flat $A$-module, then the $\mathfrak{a}$-adic completion of $F$ is also a flat $A$-module. In this paper we generalize these facts to commutative noetherian DG-rings: let $A$ be a commutative non-positive DG-ring such that $\mathrm{H}^0(A)$ is a noetherian ring, and for each $i<0$, the $\mathrm{H}^0(A)$-module $\mathrm{H}^i(A)$ is finitely generated. Given an ideal $\bar{\mathfrak{a}} \subseteq \mathrm{H}^0(A)$, we show that the local cohomology functor $\mathrm{R}Γ_{\bar{\mathfrak{a}}}$ associated to $\bar{\mathfrak{a}}$ does not increase injective dimension. Dually, the derived $\bar{\mathfrak{a}}$-adic completion functor $\mathrm{L}Λ_{\bar{\mathfrak{a}}}$ does not increase flat dimension.
description: 12 pages. Final version, to appear in the Canadian Mathematical Bulletin
Convective-reactive nucleosynthesis of K, Sc, Cl and p-process isotopes in O-C shell mergers
Creators: name: Ritter, C.
name: Andrassy, R.
name: Côté, B.
name: Herwig, F.
name: Woodward, P. R.
name: Pignatari, M.
name: Jones, S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We address the deficiency of odd-Z elements P, Cl, K and Sc in galactic chemical evolution models through an investigation of the nucleosynthesis of interacting convective O- and C shells in massive stars. 3D hydrodynamic simulations of O-shell convection with moderate C-ingestion rates show no dramatic deviation from spherical symmetry. We derive a spherically averaged diffusion coefficient for 1D nucleosynthesis simulations which show that such convective-reactive ingestion events can be a production site for P, Cl, K and Sc. An entrainment rate of $10^{-3}{{\rm M}_\odot}$/s features overproduction factors $OP_\mathrm{s} \approx 7$. Full O-C shell mergers in our 1D stellar evolution massive star models have overproduction factors $OP_\mathrm{m}>1 \mathrm{dex}$ but for such cases 3D hydrodynamic simulations suggest deviations from spherical symmetry. p-process species can be produced with overproduction factors of $OP_\mathrm{m}>1 \mathrm{dex}$, e.g. for $^{130,132}Ba$. Using the uncertain prediction of the $15{{\rm M}_\odot}$, $Z=0.02$ massive star model ($OP_\mathrm{m} \approx 15$) as representative for merger or entrainment convective-reactive events involving O- and C-burning shells, and assume that such events occur in more than 50% of all stars, our chemical evolution models reproduce the observed Galactic trends of the odd-Z elements.
description: 6 pages, 6 figures, accepted for publication in MNRAS
A note on the area of event horizon of Kleinian black hole
Creators: name: Do, Tuan Q.
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We point out that the area of event horizon of Kleinian black hole is infinite due to the fact that its event horizon is not a sphere but a hyperboloid. Therefore, the usual interpretations of Schwarzschild black hole might not be applicable to the Kleinian black hole.
description: 9 pages, 3 figures. Matches the published version. All conclusions remain unchanged. Comments are welcome
Impact and mitigation of spectroscopic systematics on DESI DR1 clustering measurements
Creators: name: Krolewski, A.
name: Yu, J.
name: Ross, A. J.
name: Penmetsa, S.
name: Percival, W. J.
name: Zhou, R.
name: Hou, J.
name: Aguilar, J.
name: Ahlen, S.
name: Brooks, D.
name: Chaussidon, E.
name: Claybaugh, T.
name: de la Macorra, A.
name: Dey, Biprateep
name: Forero-Romero, J. E.
name: Gontcho, S. Gontcho A
name: Guy, J.
name: Honscheid, K.
name: Juneau, S.
name: Kirkby, D.
name: Kisner, T.
name: Kremin, A.
name: Lambert, A.
name: Le-Guillou, L.
name: Levi, M. E.
name: Martini, P.
name: Meisner, A.
name: Miquel, R.
name: Moustakas, J.
name: Myers, A. D.
name: Newman, J. A.
name: Niz, G.
name: Palanque-Delabrouille, N.
name: Rossi, G.
name: Sanchez, E.
name: Schlafly, E. F.
name: Schlegel, D.
name: Schubnell, M.
name: Seo, H.
name: Sprayberry, D.
name: Tarlé, G.
name: Weaver, B. A.
name: Zhao, C.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The large scale structure catalogs within DESI Data Release 1 (DR1) use nearly 6 million galaxies and quasars as tracers of the large-scale structure of the universe to measure the expansion history with baryon acoustic oscillations and the growth of structure with redshift-space distortions. In order to take advantage of DESI's unprecedented statistical power, we must ensure that the galaxy clustering measurements are unaffected by non-cosmological density fluctuations. One source of spurious fluctuations comes from variation in galaxy density with spectroscopic observing conditions, lowering the redshift efficiency (and thus galaxy density) in certain areas of the sky. We measure the uniformity of the redshift success rate for DESI luminous red galaxies (LRG), bright galaxies (BGS) and quasars (QSO), complementing the detailed discussion of emission line galaxy (ELG) systematics in a companion paper (Yu et al., 2024). We find small but significant fluctuations of up to 3% in redshift success rate with the effective spectroscopic signal-to-noise, and create and describe weights that remove these fluctuations. We also describe the process to identify and remove data from certain poorly performing fibers from DESI DR1, and measure the stability of the redshift success rate with time. Finally, we find small but significant correlations of redshift success rate with position on the focal plane, survey speed, and number of exposures required, and show the impact of weights correcting these trends on the power spectrum multipoles and on cosmological parameters from BAO and RSD fits. These corrections change the best-fit parameters by $<15\%$ of their statistical errors, and thus contribute negligibly to the overall DESI error budget.
description: 53 pages, 41 figures. Supporting paper for DESI DR1 cosmological measurements