cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Two distributions shedding light on supernova Ia progenitors: delay times and G-dwarf metallicities
Creators: name: Mennekens, N.
name: Vanbeveren, D.
name: De Greve, J. P.
name: De Donder, E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using a population number synthesis code with detailed binary evolution, we calculate the distribution of the number of type Ia supernovae as a function of time after starburst. This is done for both main progenitor scenarios (single degenerate and double degenerate), but also with various evolutionary assumptions (such as mass transfer efficiency, angular momentum loss, and common envelope description). The comparison of these theoretically predicted delay time distributions with observations in elliptical galaxies then allows to constrain the evolutionary scenarios and parameters. From the morphological shape of the distributions, we conclude that all supernovae Ia cannot be produced through the single degenerate scenario alone, with the best match being obtained when both scenarios contribute. Within the double degenerate scenario, most systems go through a phase of quasi-conservative, stable Roche lobe overflow. We propose stellar rotation as a possible solution for the underestimation of the observed absolute number of events, as is the case in many theoretical population synthesis studies. A brief comparison with these other studies is made, showing good correspondence under the nontrivial condition of equivalent assumptions. We also investigate the influence of different supernova Ia progenitors and evolutionary parameters on the theoretical distribution of the iron abundance of G-type dwarfs in the Galactic disk. These stars are good indicators of the entire chemical history of the Galaxy, and their predicted metallicity distribution can also be compared to the observational ones. This again limits the number of acceptable combinations of assumptions. Supporting previous results, the best correspondence is found in the case where both the single and double degenerate scenario contribute.
description: 4 pages, 3 figures, to appear in proceedings of "IAUS 281: Binary Paths to Type Ia Supernovae Explosions"
Quark mass dependence of the low-lying charmed mesons at one loop in HH$χ$PT
Creators: name: Gil-Domínguez, F.
name: Molina, R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the light and heavy quark mass dependence of the low-lying charmed mesons in the framework of one-loop HH$χ$PT. The low energy constants are determined by analyzing the available lattice data from different LQCD simulations. Model selection tools are implemented to determine the relevant parameters as required by data with a higher precision. Discretization and other effects due to the charm quark mass setting are discussed.
Millikelvin measurements of permittivity and loss tangent of lithium niobate
Creators: name: Zorzetti, Silvia
name: Wang, Changqing
name: Gonin, Ivan
name: Kazakov, Sergey
name: Khabiboulline, Timergali
name: Romanenko, Alexander
name: Yakovlev, Vyacheslav P
name: Grassellino, Anna
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Lithium Niobate is an electro-optic material with many applications in microwave signal processing, communication, quantum sensing, and quantum computing. In this letter, we present findings on evaluating the complex electromagnetic permittivity of lithium niobate at millikelvin temperatures. Measurements are carried out using a resonant-type method with a superconducting radio-frequency (SRF) cavity operating at 7 GHz and designed to characterize anisotropic dielectrics. The relative permittivity tensor and loss tangent are measured at 50 mK with unprecedented accuracy.
description: 5 pages, 4 figures
Individual bias and fluctuations in collective decision making: from algorithms to Hamiltonians
Creators: name: Sarkanych, Petro
name: Krasnytska, Mariana
name: Gómez-Nava, Luis
name: Romanczuk, Pawel
name: Holovatch, Yurij
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: In this paper, we reconsider the spin model suggested recently to understand some features of collective decision making among higher organisms [A.T. Hartnett et al., Phys. Rev. Lett. 116 (2016) 038701]. Within the model, the state of an agent $i$ is described by the pair of variables corresponding to its opinion $S_i=\pm 1$ and a bias $ω_i$ towards any of the opposing values of $S_i$. Collective decision making is interpreted as an approach to the equilibrium state within the non-linear voter model subject to a social pressure and a probabilistic algorithm. Here, we push such physical analogy further and give the statistical physics interpretation of the model, describing it in terms of the Hamiltonian of interaction and looking for the equilibrium state via explicit calculation of its partition function. We show that depending on the assumptions about the nature of social interactions two different Hamiltonians can be formulated, which can be solved with different methods. In such an interpretation the temperature serves as a measure of fluctuations, not considered before in the original model. We find exact solutions for the thermodynamics of the model on the complete graph. The general analytical predictions are confirmed using individual-based simulations. The simulations allow us also to study the impact of system size and initial conditions in the collective decision making in finite-sized systems, in particular with respect to convergence to metastable states.
GRB 091208B: First Detection of the Optical Polarization in Early Forward Shock Emission of a Gamma-Ray Burst Afterglow
Creators: name: Uehara, T.
name: Toma, K.
name: Kawabata, K. S.
name: Chiyonobu, S.
name: Fukazawa, Y.
name: Ikejiri, Y.
name: Inoue, T.
name: Itoh, R.
name: Komatsu, T.
name: Miyamoto, H.
name: Mizuno, T.
name: Nagae, O.
name: Nakaya, H.
name: Ohsugi, T.
name: Sakimoto, K.
name: Sasada, M.
name: Tanaka, H.
name: Uemura, M.
name: Yamanaka, M.
name: Yamashita, T.
name: Yamazaki, R.
name: Yoshida, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report that the optical polarization in the afterglow of GRB 091208B is measured at t = 149 - 706 s after the burst trigger, and the polarization degree is P = 10.4% +/- 2.5%. The optical light curve at this time shows a power-law decay with index -0.75 +/- 0.02, which is interpreted as the forward shock synchrotron emission, and thus this is the first detection of the early-time optical polarization in the forward shock (rather than that in the reverse shock reported by Steele et al. (2009). This detection disfavors the afterglow model in which the magnetic fields in the emission region are random on the plasma skin depth scales, such as amplified by the plasma instabilities, e.g., Weibel instability. We suggest that the fields are amplified by the magnetohydrodynamic instabilities, which would be tested by future observations of the temporal changes of the polarization degrees and angles for other bursts.
description: 12 pages, 4 figures, accepted for publication in ApJ Letters
3D tracking of particles in a dusty plasma by laser sheet tomography
Creators: name: Yu, Wentao
name: Burton, Justin C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The collective behavior of levitated particles in a weakly-ionized plasma (dusty plasma) has raised significant scientific interest. This is due to the complex array of forces acting on the particles, and their potential to act as in-situ diagnostics of the plasma environment. Ideally, the three-dimensional (3D) motion of many particles should be tracked for long periods of time. Typically, stereoscopic imaging using multiple cameras combined with particle image velocimetry (PIV) is used to obtain a velocity field of many particles, yet this method is limited by its sample volume and short time scales. Here we demonstrate a different, high-speed tomographic imaging method capable of tracking individual particles. We use a scanning laser sheet coupled to a single high-speed camera. We are able to identify and track tens of individual particles over centimeter length scales for several minutes, corresponding to more than 10,000 frames.
description: 7 pages, 5 figures
A Brief Discussion on High Glucose with Insulin Induces Cell Cycle Progression and Activation of Oncogenic Signaling of Bladder Epithelial Cells Cotreated with Metformin and Pioglitazone
Creators: name: Daejin Kim1
name: Byul-Nim Ahn2
name: Kim, Yeong Seok
name: Hur, Dae Young
name: Yang, Jae Wook
name: Park, Ga Bin
name: Jang, Jung Eun
name: Lee, Eun Ju
name: Kwon, Min Jeong
name: Kim, Tae Nyun
name: Kim, Mi Kyung
name: Park, Jeong Hyun
name: Rhee, Byoung Doo
name: Lee, Soon Hee
Publisher: name: Zenodo
Year: 2021
Subjects: Metformin
pioglitazone
bladder epithelial cells
oncogenic signaling
insulin induces
glucose
PPARγ stimulation

description: Metformin and pioglitazone are two commonly prescribed oral hypoglycemic agents for diabetes. Recent evidence suggests these drugs may contribute to bladder cancer. Significant evidence exists linking diabetes with breast, colon, liver, and pancreatic cancers. This study investigated molecular mechanisms underlying effects of metformin and pioglitazone in bladder epithelial carcinogenesis in type 2 diabetes. The cells derived from human bladder epithelial cells (HBlEpC) were treated with metformin or pioglitazone with high glucose and insulin. Cell viability and proliferation were evaluated using the 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide assay and a bromodeoxyuridine incorporation assay, respectively while cell cycle regulatory factors and oncogene expression were analyzed using western blotting. Metformin or pioglitazone suppressed cell viability concentration- and time-dependently, which was reversed by exposure to high glucose with or without insulin. Prolonged exposure to high glucose and insulin enhanced cyclin D, cyclin-dependent kinase 4 (Cdk4) and Cdk2 expression and suppressed cyclin-dependent kinase inhibitors p21 and p15/16 in HBlEpC co-treated with pioglitazone and metformin. Levels of tumor suppressor proteins p53 and cav-1 were downregulated while that of the oncogenic protein as c-myc were upregulated under high glucose and insulin supplementation in HBlEpC co-treated with pioglitazone and metformin. Prolonged exposure to high glucose with or without insulin downregulated B cell lymphoma 2-associated X (Bax) and failed to enhance the expression of extracellular signal-regulated kinase (ERK) and p38 mitogen-activated protein kinase (p38MAPK) in drug-treated cells. These results suggest that hyperglycemic and insulinemic conditions promote cell cycle progression and oncogenic signaling in drug-treated bladder epithelial cells and uncontrolled hyperglycemia and hyperinsulinemia are probably greater cancer risk factors than diabetes drugs. Furthermore, our data provide insight into how these conditions enhance the carcinogenic effect in drug-treated bladder epithelial cells and indicate that uncontrolled hyperglycemia and hyperinsulinemia in people with diabetes are probably more dangerous than TZD administration or PPARγ stimulation in a clinical situation.
How well can VMEC predict the initial saturation of external kink modes in near circular tokamaks and $l=2$ stellarators?
Creators: name: Ramasamy, Rohan
name: Hoelzl, Matthias
name: Henneberg, Sophia
name: Strumberger, Erika
name: Lackner, Karl
name: Günter, Sibylle
Publisher: name: arXiv
Year: 2023
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The equilibrium code, VMEC, is used to study external kinks in low $β$ tokamaks and $l=2$ stellarators. The applicability of the code when modelling nonlinear MHD effects is explored in an attempt to understand and predict how the initial saturation of the MHD mode depends on the external rotational transform. It is shown that helicity preserving, free boundary VMEC computations do not converge to a single perturbed solution with increasing spectral resolution. Additional constraints are therefore applied to narrow down the numerical resolution parameters appropriate for physical scans. The dependence of the modelled (4, 1) kink mode on the external rotational transform and field periodicity is then studied. While saturated states can be identified which decrease in amplitude with increasing external rotational transform, bifurcated states are found that contradict this trend. It was therefore not possible to use VMEC alone to identify the physical dependency of the nonlinear mode amplitude on the magnetic geometry. The accuracy of the VMEC solutions is nevertheless demonstrated by showing that the expected toroidal mode coupling is captured in the magnetic energy spectrum for stellarator cases. Comparing with the initial value code, JOREK, the predicted redistribution of poloidal magnetic energy from the vacuum to plasma region in VMEC is shown to be physical. This work is a first step towards using VMEC to study MHD modes in stellarator geometry.
description: Submitted to Physics of Plasmas. The submission has been modified according to reviewer comments
Radiative Meson and Glueball Decays in the Witten-Sakai-Sugimoto Model
Creators: name: Hechenberger, Florian
name: Leutgeb, Josef
name: Rebhan, Anton
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate radiative decay rates of mesons and glueballs in the top-down holographic Witten-Sakai-Sugimoto model with finite quark masses. After assessing to what extent this model agrees or disagrees with experimental data, we present its predictions for so far undetermined decay channels. Contrary to widespread expectations, we obtain sizeable two-photon widths of scalar, tensor, and pseudoscalar glueballs, suggesting in particular that the observed two-photon rate of the glueball candidate $f_0(1710)$ is not too large to permit a glueball interpretation, but could be even much higher. We also discuss the so-called exotic scalar glueball, which in the Witten-Sakai-Sugimoto model is too broad to match either of the main glueball candidates $f_0(1500)$ and $f_0(1710)$, but might be of interest with regard to the alternative scenario of the so-called fragmented scalar glueball. Employing the exotic scalar glueball for the latter, much smaller two-photon rates are predicted for the ground-state glueball despite a larger total width; relatively large two-photon rates would then apply to the excited scalar glueball described by the predominantly dilatonic scalar glueball. In either case, the resulting contributions to the muon $g-2$ from hadronic light-by-light scattering involving glueball exchanges are small compared to other single meson exchanges, of the order of $\lesssim 10^{-12}$.
description: REVTEX 41 pages, 11 tables; v2: minor additions and corrections, 2 references added
Cognitive factors associated with increased falls risk in seniors
Creators: name: Nagamatsu, Lindsay S.
Publisher: name: University of British Columbia
Year: 2009

description: Falls are experienced annually by approximately one third of community dwellers over the age of 65, and while neuro-cognitive deficits have been shown to increase falls risk, the specific nature of these deficits remain unspecified. Here we examined whether visual-spatial attention may be a core neuro-cognitive system showing abnormal function in fallers. Using a between-groups design, we recorded event-related potentials in a canonical spatial cuing task performed by two groups of senior (aged 65 years old and older) participants: those with a recent history of falls and those with no such history. In terms of attentional control systems in cortex, we found no significant differences in function between groups. However, in terms of attentional facilitation of cortical processing, we found that fallers manifest specific abnormalities in the sensory/perceptual processing of targets in the left visual field. Our findings thus suggest that fallers have specific deficits in visuocortical systems associated with attentional enhancement of events on the left side of visual space.
Characterizing the Depolarizing Quantum Channel in Terms of Riemannian Geometry
Creators: name: Cafaro, Carlo
name: Mancini, Stefano
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We explore the conceptual usefulness of Riemannian geometric tools induced by the statistical concept of distinguishability in quantifying the effect of a depolarizing channel on quantum states. Specifically, we compare the geometries of the interior of undeformed and deformed Bloch spheres related to density operators on a two-dimensional Hilbert space. We show that randomization emerges geometrically through a smaller infinitesimal quantum line element on the deformed Bloch sphere while the uniform contraction manifests itself via a deformed set of geodesics where the spacial components of the deformed four-Bloch vector are simply the contracted versions of the undeformed Bloch vector components.
description: 7 pages, 0 figures; Accepted contribution to "Folding and Unfolding: Interactions from Geometry", Workshop in honour of Giuseppe Marmo's 65th birthday; 8-12 June 2011, Ischia (ITALY)
A deep learning approach to the measurement of long-lived memory kernels from Generalised Langevin Dynamics
Creators: name: Winter, Max Kerr
name: Pihlajamaa, Ilian
name: Debets, Vincent E.
name: Janssen, Liesbeth M. C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Memory effects are ubiquitous in a wide variety of complex physical phenomena, ranging from glassy dynamics and metamaterials to climate models. The Generalised Langevin Equation (GLE) provides a rigorous way to describe memory effects via the so-called memory kernel in an integro-differential equation. However, the memory kernel is often unknown, and accurately predicting or measuring it via e.g. a numerical inverse Laplace transform remains a herculean task. Here we describe a novel method using deep neural networks (DNNs) to measure memory kernels from dynamical data. As proof-of-principle, we focus on the notoriously long-lived memory effects of glassy systems, which have proved a major challenge to existing methods. Specifically, we learn a training set generated with the Mode-Coupling Theory (MCT) of hard spheres. Our DNNs are remarkably robust against noise, in contrast to conventional techniques which require ensemble averaging over many independent trajectories. Finally, we demonstrate that a network trained on data generated from analytic theory (hard-sphere MCT) generalises well to data from simulations of a different system (Brownian Weeks-Chandler-Andersen particles). We provide a general pipeline, KernelLearner, for training networks to extract memory kernels from any non-Markovian system described by a GLE. The success of our DNN method applied to glassy systems suggests deep learning can play an important role in the study of dynamical systems that exhibit memory effects.
On Minc's sheltered middle path
Creators: name: Repovš, Dušan
name: Rosicki, Witold
name: Virk, Žiga
name: Zastrow, Andreas
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 54D05, 54C05

description: This paper shows that a construction, which was introduced by Piotr Minc in connection with a problem that came from Helly type theorems and that allows to replace three PL-arcs with a "sheltered middle path", can in the case of general (non-PL) paths result in the topologist's sine curve.
description: 18 pages, 3 figures
Role of endoplasmic reticulum calcium stores in beta-cell ER stress and lipotoxicity
Creators: name: Gwiazda, Kamila Sabina
Publisher: name: University of British Columbia
Year: 2009

description: There are strong links between obesity, elevated free fatty acids, and type 2 diabetes. Specifically, the saturated fatty acid palmitate has pleiotropic effects on β-cell function and survival. The present study sought to determine the mechanism by which palmitate affects intracellular Ca²⁺ in pancreatic β-cells, and in particular the role of the endoplasmic reticulum (ER). In the MIN6 β-cell line, palmitate rapidly increased cytosolic Ca²⁺ through a combination of Ca²⁺ store release and extracellular Ca²⁺ influx. Palmitate caused a reversible lowering of ER Ca²⁺, measured directly with the fluorescent protein-based ER Ca²⁺ sensor, D1ER. Using another genetically encoded indicator, long-lasting oscillations of cytosolic Ca²⁺ in palmitate-treated cells were observed. The kinetics of pharmacological SERCA inhibition on the β-cell ER stress response were characterized, and the ER calcium sensor PERK was found to be rapidly activated in response to irreversible ER calcium depletion. ER calcium depletion in palmitate-treated cells also induced rapid phosphorylation of PERK, as well as other subsequent downstream ER stress signals. In summary, the effects of the free fatty acid palmitate on pancreatic β-cell Ca²⁺ homeostasis were characterized in this thesis. This study provides the first direct evidence that free fatty acids reduce ER Ca²⁺ and sheds light on pathways involved in β-cell ER stress, lipotoxicity and the pathogenesis of type 2 diabetes.
Do X-ray dark or underluminous galaxy clusters exist?
Creators: name: Andreon, S.
name: Moretti, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: [Abridged] We study the X-ray properties of a color-selected sample of clusters at 0.1
description: A&A, in press
Field-induced effects in the spin liquid candidate PbCuTe$_{2}$O$_{6}$
Creators: name: Eibisch, Paul
name: Thurn, Christian
name: Ata, Arif
name: Tutsch, Ulrich
name: Saito, Yohei
name: Hartmann, Steffi
name: Wolf, Bernd
name: Hanna, Abanoub R. N.
name: Islam, A. T. M. Nazmul
name: Chillal, Shravani
name: Lake, Bella
name: Lang, Michael
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: PbCuTe$_2$O$_6$ is considered as one of the rare candidate materials for a three-dimensional quantum spin liquid (QSL). This assessment was based on the results of various magnetic experiments, performed mainly on polycrystalline material. More recent measurements on single crystals revealed an even more exotic behavior, yielding ferroelectric order below $T_{\text{FE}}\approx 1\,\text{K}$, accompanied by distinct lattice distortions, and a somewhat modified magnetic response which is still consistent with a QSL. Here we report on low-temperature measurements of various thermodynamic, magnetic and dielectric properties of single crystalline PbCuTe$_2$O$_6$ in magnetic fields $B\leq 14.5\,\text{T}$. The combination of these various probes allows us to construct a detailed $B$-$T$ phase diagram including a ferroelectric phase for $B \leq$ $8\,\text{T}$ and a $B$-induced magnetic phase at $B \geq$ $11\,\text{T}$. These phases are preceded by or coincide with a structural transition from a cubic high-temperature phase into a distorted non-cubic low-temperature state. The phase diagram discloses two quantum critical points (QCPs) in the accessible field range, a ferroelectric QCP at $B_{c1}$ = $7.9\,\text{T}$ and a magnetic QCP at $B_{c2}$ = $11\,\text{T}$. Field-induced lattice distortions, observed in the state at $T>$ $1\,\text{K}$ and which are assigned to the effect of spin-orbit interaction of the Cu$^{2+}$-ions, are considered as the key mechanism by which the magnetic field couples to the dielectric degrees of freedom in this material.
Robust Spin Polarization of Yu-Shiba-Rusinov States in Superconductor/Ferromagnetic Insulator Heterostructures
Creators: name: Skurativska, A.
name: Ortuzar, J.
name: Bercioux, D.
name: Bergeret, F. S.
name: Cazalilla, M. A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Yu-Shiba-Rusinov (YSR) states arise as sub-gap excitations of a magnetic impurity in a superconducting host. Taking into account the quantum nature of the impurity spin in a single-site approximation, we study the spectral properties of the YSR excitations of a system of magnetic impurity in a spin-split superconductor, i.e. a superconductor in proximity to a ferromagnetic insulator at zero external magnetic fields. The YSR excitations of this system exhibit a robust spin-polarization that is protected from fluctuations and environmental noise by the exchange field of the ferromagnetic insulator, which can be as large as a few Tesla. We compare the results of this quantum approach to the classical approach, which conventionally predicts fully polarized YSR excitations even in the absence of exchange and external magnetic field. Turning on a small magnetic field, we show the latter splits the YSR excitations in the regime where the impurity is strongly coupled to the superconductor, whilst the classical approach predicts no such splitting. The studied system can potentially be realized in a tunnel junction connected to a quantum dot in proximity to a spin-split superconductor.
description: 10 pages, 5 figures
The intracluster magnetic field power spectrum in A2199
Creators: name: Vacca, V.
name: Murgia, M.
name: Govoni, F.
name: Feretti, L.
name: Giovannini, G.
name: Perley, R. A.
name: Taylor, G. B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the magnetic field power spectrum in the cool core galaxy cluster A2199 by analyzing the polarized emission of the central radio source 3C338. The polarized radiation from the radio emitting plasma is modified by the Faraday rotation as it passes through the magneto-ionic intracluster medium. We use Very Large Array observations between 1665 and 8415 MHz to produce detailed Faraday rotation measure and fractional polarization images of the radio galaxy. We simulate Gaussian random three-dimensional magnetic field models with different power-law power spectra and we assume that the field strength decreases radially with the thermal gas density as n_e^η. By comparing the synthetic and the observed images with a Bayesian approach, we constrain the strength and structure of the magnetic field associated with the intracluster medium. We find that the Faraday rotation toward 3C338 in A2199 is consistent with a magnetic field power law power spectrum characterized by an index n=(2.8 \pm 1.3) between a maximum and a minimum scale of fluctuation of Λ_{max}=(35 \pm 28) kpc and Λ_{min}=(0.7 \pm 0.1) kpc, respectively. By including in the modeling X-ray cavities coincident with the radio galaxy lobes, we find a magnetic field strength of =(11.7 \pm 9.0) μG at the cluster center. Further out, the field decreases with the radius following the gas density to the power of η=(0.9 \pm 0.5).
description: 17 pages, 12 figures, A&A accepted
Dynamical Mean Field Theory extension to the nonequilibrium Two-Particle Self-Consistent approach
Creators: name: Simard, Olivier
name: Werner, Philipp
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Nonlocal correlations play an essential role in correlated electron systems, especially in the vicinity of phase transitions and crossovers, where two-particle correlation functions display a distinct momentum dependence. In nonequilibrium settings, the effect of nonlocal correlations on dynamical phase transitions, prethermalization phenomena and trapping in metastable states is not well understood. In this paper, we introduce a dynamical mean field theory (DMFT) extension to the nonequilibrium Two-particle Self-Consistent (TPSC) approach, which allows to perform nonequilibrium simulations capturing short- and long-ranged nonlocal correlations in the weak-, intermediate- and strong-correlation regime. The method self-consistently computes local spin and charge vertices, from which a momentum-dependent self-energy is constructed. Replacing the local part of the self-energy by the DMFT result within this self-consistent scheme provides an improved description of local correlation effects. We explain the details of the formalism and the implementation, and demonstrate the versatility of DMFT+TPSC with lattice hopping quenches and dimensional crossovers in the Hubbard model.
description: 27 pages, 31 figures
A study of the kinematics and binary-induced shaping of the planetary nebula HaTr 4
Creators: name: Tyndall, A. A.
name: Jones, D.
name: Lloyd, M.
name: O'Brien, T. J.
name: Pollacco, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first detailed spatio-kinematical analysis and modelling of the planetary nebula HaTr 4, one of few known to contain a post-common-envelope central star system. Common envelope evolution is believed to play an important role in the shaping of planetary nebulae, but the exact nature of this role is yet to be understood. High spatial- and spectral- resolution spectroscopy of the [OIII]5007 nebular line obtained with VLT-UVES are presented alongside deep narrowband Ha+[NII]6584 imagery obtained using EMMI-NTT, and together the two are used to derive the three-dimensional morphology of HaTr 4. The nebula is found to display an extended ovoid morphology with an enhanced equatorial region consistent with a toroidal waist - a feature believed to be typical amongst planetary nebulae with post-common-envelope central stars. The nebular symmetry axis is found to lie perpendicular to the orbital plane of the central binary, concordant with the idea that the formation and evolution of HaTr 4 has been strongly influenced by its central binary.
description: 9 pages, 5 figures, accepted for publication in MNRAS
RAPTOR: a new collinear laser ionization spectroscopy and laser-radiofrequency double-resonance experiment at the IGISOL facility
Creators: name: Kujanpää, Sonja
name: Raggio, Andrea
name: de Groote, Ruben
name: Athanasakis-Kaklamanakis, Michail
name: Block, Michael
name: Candiello, Anita
name: Gins, Wouter
name: Koszorus, Agota
name: Moore, Iain
name: Reponen, Mikael
name: Warbinek, Jessica
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: RAPTOR, Resonance ionization spectroscopy And Purification Traps for Optimized spectRoscopy, is a new collinear resonance ionization spectroscopy device constructed at the Ion Guide Isotope Separator On-Line (IGISOL) facility at the University of Jyväskylä, Finland. By operating at beam energies of under 10 keV, the footprint of the experiment is reduced compared to more traditional collinear laser spectroscopy beamlines. In addition, RAPTOR is coupled to the JYFLTRAP Penning trap mass spectrometer, opening a window to laser-assisted nuclear-state selective purification, serving not only the mass measurement program, but also supporting post-trap decay spectroscopy experiments. Finally, the low-energy ion beams used for RAPTOR will enable high-precision laser-radiofrequency double-resonance experiments, resulting in spectroscopy with linewidths below 1 MHz. In this contribution, the technical layout of RAPTOR and a selection of ion-beam optical simulations for the device are presented, along with a discussion of the current status of the commissioning experiments.
description: EMIS 2022 conference, 4 figures
Neothrombiidae
Creators: name: Tashakor, Samaneh
name: Hajiqanbar, Hamidreza
name: Saboori, Alireza
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Actinedida
Neothrombiidae

description: Family Neothrombiidae
description: Published as part of Tashakor, Samaneh, Hajiqanbar, Hamidreza & Saboori, Alireza, 2013, Redefinition of the genus Silphitrombium (Trombidiformes: Neothrombiidae) with description of two new species parasitizing beetles (Coleoptera: Elateridae, Tenebrionidae) from Iran, pp. 457-470 in Zootaxa 3736 (5) on page 458, DOI: 10.11646/zootaxa.3736.5.2, http://zenodo.org/record/221970
Experimental Verification of PCH-EM Algorithm for Characterizing DSERN Image Sensors
Creators: name: Hendrickson, Aaron
name: Haefner, David P.
name: Shade, Nicholas R.
name: Fossum, Eric R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The Photon Counting Histogram Expectation Maximization (PCH-EM) algorithm has recently been reported as a candidate method for the characterization of Deep Sub-Electron Read Noise (DSERN) image sensors. This work describes a comprehensive demonstration of the PCH-EM algorithm applied to a DSERN capable quanta image sensor. The results show that PCH-EM is able to characterize DSERN pixels for a large span of quanta exposure and read noise values. The per-pixel characterization results of the sensor are combined with the proposed Photon Counting Distribution (PCD) model to demonstrate the ability of PCH-EM to predict the ensemble distribution of the device. The agreement between experimental observations and model predictions demonstrates both the applicability of the PCD model in the DSERN regime as well as the ability of the PCH-EM algorithm to accurately estimate the underlying model parameters.
description: 8 pages, 9 figures
A new technique to efficiently select Compton-thick AGN
Creators: name: Severgnini, P.
name: Caccianiga, A.
name: Della Ceca, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a new efficient diagnostic method, based on mid-infrared and X-ray data, to select local (z<0.1) Compton-thick (CT) AGN with the aim of estimating their surface and space density. We define a region in the X-ray/IR vs. HR plane associated to CT AGN, i.e. F(2-12keV)/F25nu25<0.02 and HR>-0.2. We build up a sample of 43 CT AGN candidates using data from IRAS-PSC and 2XMM catalogue. In order to test the efficiency of the proposed method in selecting CT AGN we use the results of the X-ray spectral analysis performed on all the sources of our sample. After taking into account the different selection effects, we have estimated the number of CT in the local Universe and their density down to the IRAS flux limit of F25=0.5Jy. We find that the diagnostic plot proposed here is an efficient method to select Compton-thick AGN in the nearby Universe since ~84% of the sources populating the proposed CT region are actually CT AGN. Twenty percent are newly-discovered CT AGN. We then estimate the surface density of CT AGN down to the IRAS PSC catalogue flux limit (F25=0.5Jy) that turns out to be ~3e-3 src deg-2. After estimating an equivalent IR-hard X-ray limiting flux, we compare our result with those found with SWIFT-BAT. We find that the surface density derived here is a factor 4 above the density computed in the hard X-ray surveys. This difference is ascribed, at least in part, to a significant contribution (~60-90%) of the star-forming activity to the total 25 mic emission for the sources in our sample. By considering only the 25 mic AGN emission, we estimate a surface density of CT AGN which is consistent with the results found by hard X-ray surveys. Finally, we estimated the co-moving space density of CT AGN with intrinsic LX>1e43 erg s-1 (0.004
description: Accepted for publication in A&A; 10 pages, 5 figures
Military bureaucracy, politics and society in Egypt: the end of Nasir
Creators: name: Abdul-Rahman, Asad
Publisher: name: University of Calgary
Year: 1973
Subjects: subject: DT 107.83 A32 1973
subject: Egypt - Politics and government
subject: Nasser, Gamal Abdel, 1918-1970
subject: Egypt - Armed Forces - Political activity

description: Bibliography: p. 188-209.
The GRETOBAPE gas-phase reaction network: the importance of being exothermic
Creators: name: Tinacci, Lorenzo
name: Ferrada-Chamorro, Simón
name: Ceccarelli, Cecilia
name: Pantaleone, Stefano
name: Ascenzi, Daniela
name: Maranzana, Andrea
name: Balucani, Nadia
name: Ugliengo, Piero
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The gas-phase reaction networks are the backbone of astrochemical models. However, due to their complexity and non-linear impact on the astrochemical modeling, they can be the first source of error in the simulations if incorrect reactions are present. Over time, following the increasing number of species detected, astrochemists have added new reactions, based on laboratory experiments and quantum mechanics (QM) computations as well as reactions inferred by chemical intuition and similarity principle. However, sometimes no verification of their feasibility in the interstellar conditions, namely their exothermicity, was performed. In this work, we present a new gas-phase reaction network, GRETOBAPE, based on the KIDA2014 network and updated with several reactions, cleaned from endothermic reactions not explicitly recognized as such. To this end, we characterized all the species in the GRETOBAPE network with accurate QM calculations. We found that 5% of the reactions in the original network are endothermic although most of them are reported as barrierless. The reaction network of Si-bearing species is the most impacted by the endothermicity cleaning process. We also produced a cleaned reduced network, GRETOBAPE-red, to be used to simulate astrochemical situations where only C-, O-, N- and S- bearing species with less than 6 atoms are needed. Finally, the new GRETOBAPE network, its reduced version, as well as the database with all the molecular properties are made publicly available. The species properties database can be used in the future to test the feasibility of possibly new reactions.
description: ApJS submitted
MAXI GSC monitoring of the Crab nebula and pulsar during the GeV gamma-ray flare in September 2010
Creators: name: Morii, Mikio
name: Sugizaki, Mutsumi
name: Kawai, Nobuyuki
name: Serino, Motoko
name: Yamamoto, Takayuki
name: Usui, Ryuichi
name: Daikyuji, Arata
name: Ebisawa, Ken
name: Eguchi, Satoshi
name: Hiroi, Kazuo
name: Ishikawa, Masaki
name: Isobe, Naoki
name: Kawasaki, Kazuyoshi
name: Kimura, Masashi
name: Kitayama, Hiroki
name: Kohama, Mitsuhiro
name: Matsumura, Takanori
name: Matsuoka, Masaru
name: Mihara, Tatehiro
name: Nakagawa, Yujin E.
name: Nakahira, Satoshi
name: Nakajima, Motoki
name: Negoro, Hitoshi
name: Ozawa, Hiroshi
name: Shidatsu, Megumi
name: Sootome, Tetsuya
name: Sugimori, Kousuke
name: Suwa, Fumitoshi
name: Tomida, Hiroshi
name: Tsuboi, Yohko
name: Tsunemi, Hiroshi
name: Ueda, Yoshihiro
name: Ueno, Shiro
name: Uzawa, Akiko
name: Yamaoka, Kazutaka
name: Yamazaki, Kyohei
name: Yoshida, Atsumasa
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the MAXI GSC X-ray monitoring of the Crab nebula and pulsar during the GeV gamma-ray flare for the period of 2010 September 18-24 (MJD 55457-55463) detected by AGILE and Fermi-LAT. There were no significant variations on the pulse phase averaged and pulsed fluxes during the gamma-ray flare on time scales from 0.5 to 5 days. The pulse profile also showed no significant change during this period. The upper limits on the variations of the pulse phase averaged and pulsed fluxes for the period MJD 55457.5-55462.5 in the 4-10 keV band are derived to be 1 and 19%, respectively, at the 90% confidence limit of the statistical uncertainty. The lack of variations in the pulsed component over the multi-wavelength range (radio, X-ray, hard X-ray, and gamma-ray) supports not the pulsar but the nebular origin for the gamma-ray flare.
description: 11 pages, 3 figures, accepted for PASJ
IPERION HS D8.3 Report on existing RI centralised procedures
Creators: name: Benassi, Laura
name: Strlič, Matija
name: Chaban, Antonina
name: Bertasa, Moira
name: Di Gianvincenzo, Fabiana
name: Rijavec, Tjaša
name: Novotný, Jakub
name: Striova, Jana
Publisher: name: Zenodo
Year: 2023
Subjects: Research Infrastructures, Communication, Training

description: This deliverable has been elaborated within IPERION HS Work Package (WP) 8 – Central support activities – that has been designed to mimic the activities of the future European Research Infrastructure for Heritage Science (E-RIHS) European Research Infrastructure Consortium (ERIC). In this WP, two of six tasks were dedicated to training (T8.2 Integrated access to training activities) and T8.3 (Communication). This deliverable examines how are these activities organized by other ERICs and within IPERION HS project. In this mapping exercise, the formal delivery of task 8.5, the information was collected through the analysis of the websites of ERICs, through questionnaires and in person interviews with training/communication officers at ERICs. Practical considerations regarding the communication and training support activities are summarized in view of establishing E-RIHS ERIC.
The Palestine question before the United Nations (1946-1949)
Creators: name: Faris, Nabil Ahmed
Publisher: name: University of Calgary
Year: 1975
Subjects: subject: DS 119.7 F35 1975 Microfiche
subject: Jewish-Arab relations
subject: United Nations - Palestine

description: Bibliography: p. 188-202.
description: This study utilizes the historical approach to analyze the Palestine Question with its relevance to the United Nations. However, any historical study of the problem is incomplete without a careful look into the origins of the conflict. The thesis introduction presents the issues, terms, scope, and method. The second chapter provides a historical background of the Palestine Question. It deals with the origins of the British Mandate in Palestine and the following events. Chapter three is on the international implications of the Palestine Question. The author believes that Palestine became an international problem long before the year 1947, when Great Britain referred the Question to the United Nations. To be exact, the Balfour Declaration of the year 1917, was the first signal inviting international involvement. Chapter four deals with the United Nations responsibility towards finding a peaceful settlement, after the proclamation of the state of Israel and the entry of the Arab armies into Palestine. The 6hapter also stresses the importance of the Armistice Agreements signed in the year 1949. The findings of the study are drawn out in the concluding Chapter.
Trafficking Coordinate Description of Intracellular Transport Control of Signaling Networks
Creators: name: Vilar, Jose M. G.
name: Saiz, Leonor
Publisher: name: arXiv
Year: 2011
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Biological Physics (physics.bio-ph)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Many cellular networks rely on the regulated transport of their components to transduce extracellular information into precise intracellular signals. The dynamics of these networks is typically described in terms of compartmentalized chemical reactions. There are many important situations, however, in which the properties of the compartments change continuously in a way that cannot naturally be described by chemical reactions. Here, we develop an approach based on transport along a trafficking coordinate to precisely describe these processes and we apply it explicitly to the TGF-β signal transduction network, which plays a fundamental role in many diseases and cellular processes. The results of this newly introduced approach accurately capture for the first time the distinct TGF-β signaling dynamics of cells with and without cancerous backgrounds and provide an avenue to predict the effects of chemical perturbations in a way that closely recapitulates the observed cellular behavior.
description: 17 pages, 5 figures
Advanced Study on the Use of Ivabradine in Supraventricular Tachycardia Caused by Refractory Focal Atrial Tachycardia in Neonates to Avoid Radiofrequency Ablation
Creators: name: Apoorva Taduri
name: Kotha, Rakesh
name: T. Himabindu Singh
Publisher: name: Zenodo
Year: 2021
Subjects: Arrhythmias
Focal atrial tachycardia
Ivabradine
Neonate
Supraventricular tachycardia

description: Supraventricular tachycardia (SVT) is a clinical condition caused by a variety of arrhythmias with varying etiologies. SVT is the most common arrhythmia in a neonate with an incidence of 1 in 200– 250. In SVT, heart rate is usually >220 beats/min. Any arrhythmogenic focus above the ventricles, whether reentrant or isolated ectopic, can cause SVT. Tachy- and bradyarrhythmias are usually tolerated better in neonates than in other age groups. After at least 36–48 hours, signs of cardiac failure appear in SVT. We're here to describe a case of SVT produced by a unifocal atrial ectopic focus that was treated with ivabradine because it didn't react to other antiarrhythmic medications. Since there is a scarcity of literature on the use of ivabradine in paediatric SVT, we are reporting this case. Ivabradine can be considered before resorting to invasive surgical ablation of the focus as ablation is associated with more complications.