cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Numerical relativity simulations of the neutron star merger GW190425: microphysics and mass ratio effects
Creators: name: Camilletti, A.
name: Chiesa, L.
name: Ricigliano, G.
name: Perego, A.
name: Lippold, L. C.
name: Padamata, S.
name: Bernuzzi, S.
name: Radice, D.
name: Logoteta, D.
name: Guercilena, F. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: GW190425 was the second gravitational wave (GW) signal compatible with a binary neutron star (BNS) merger detected by the Advanced LIGO and Advanced Virgo detectors. Since no electromagnetic counterpart was identified, whether the associated kilonova was too dim or the localisation area too broad is still an open question. We simulate 28 BNS mergers with the chirp mass of GW190425 and mass ratio $1 \leq q \leq 1.67$, using numerical-relativity simulations with finite temperature, composition dependent nuclear equation of state (EOS) and neutrino radiation. The energy emitted in GWs is $\lesssim 0.083 M_{\odot} c^2$ with peak luminosity of $1.1-2.4 \times 10^{58} {\rm erg~s^{-1}}/(1+q)^2$. Dynamical ejecta and disc mass range between $5 \times 10^{-6} - \sim 10^{-3}~M_{\odot}$ and $10^{-5} - 0.1~M_{\odot}$, respectively. Asymmetric mergers, especially with stiff EOS, unbind more matter and to form heavier discs compared to equal mass binaries. The angular momentum of the disc is $8-10 M_{\odot}~GM_{\rm disc}/c$ over three orders of magnitude in $M_{\rm disc}$. While the nucleosynthesis shows no peculiarity, the simulated kilonovae are relatively dim compared with the GW170817 event. For distances compatible with GW190425, AB magnitudes are always dimmer than $\sim20~{\rm mag}$ for the $B$, $r$ and $K$ bands, with brighter kilonovae associated to more asymmetric binaries and stiffer EOS. We suggest that, even assuming a good coverage of GW190425's sky location, the kilonova could hardly have been detected by present wide-field surveys and no firm constraints on the binary parameters or EOS can be argued from the lack of the detection.
description: 22 pages, 17 figures
Methodology for the GIS Project 'Victoria Lake'
Creators: name: Lemenkova, Polina
Publisher: name: figshare
Year: 2018
Subjects: subject: Geography
subject: Physical Geography
subject: 160401 Economic Geography
subject: FOS: Social and economic geography

description: Module 1 and Module 2 Student: Lemenkova Polina Model 1. Description of Brief Conceptual Model of the Database Preparation 1) Description of the Source Data used For the Victoria Lake region GIS Project we have the following thematic data available:  Shape files of administrative boundaries (ArcGIS compatible format .shp), separately for Uganda, Tanzania and Kenya. Each .shp file has also additional supporting files like as .shx and .prj, which show additional information about projection, metadata etc. Also available UNEP grids for the same territories  Precipitation climatic data in .txt format, containing meteorological data in digital format: precipitation values in different months and years.  Digital Elevation Models (DEMs) showing relief characteristics and elevation of the research area. Data are taken from USGS website. There are two available data of GTopo30-E020N40.DEM covering territory of Kenya and Uganda, and E020S10.DEM showing southeastern part of Tanzania. DEM files contain horizontal grid spacing of 30 arc seconds (approximately 1 kilometre).  Land Cover data in raster format which is stored in .bsq format: IGBP.bsq. This file is a part of the global land cover characteristics database. The pixel values correspond to class numbers defined in the appropriate land cover classification scheme legend. The data projected in the Lambert Azimuthal Equal Area projection for the Africa land cover characteristics.  Population data were downloaded from the UNEP website. They contain raster data for the whole Africa continent. We have chosen two years for our research-data for 1990 and 2000 years. Each dataset had two different files-population density (popd00 and popd90 respectively) and population total.  As an additional data set we need miscellaneous data containing Landsat ETM+ images in MrSid formatS -36-00_2000.sid. 2) Files formats and Operations needed to import the data to GIS programme The administrative boundaries data are initially in .shp file format, so that we only need to re-project them to necessary projection (Africa Albers Equal Area Conic). The DEM data were initially zipped in tar.gz so that we extracted them via WinZip Manager in order to add them into the GIS project. Both DEM files contain part-files in specific format-.DEM, .DMW, .gif file and .HDR extension. DEM files are necessary for reading information about elevation heights and relief. The Africa land cover characteristics in Land Cover data IGBP.bsq is a flat, raster format. Population data are stored in world file .twf format which we opened in ArcGIS as .tiff raster files and re-projected to the Africa Albers Equal Area Conic projection. To import both raster and vector data we used "Add Data" function.
Matrix Theory Description of Schwarzschild Black Holes in the Regime N >> S
Creators: name: Rama, S. Kalyana
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the description of Schwarzschild black holes, of entropy S, within matrix theory in the regime $N \ge S \gg 1$. We obtain the most general matrix theory equation of state by requiring that black holes admit a description within this theory. It has a recognisable form in various cases. In some cases a D dimensional black hole can plausibly be thought of as a $\tilde{D} = D + 1$ dimensional black hole, described by another auxiliary matrix theory, but in its $\tilde{N} \sim S$ regime. We find what appears to be a matrix theory generalisation to higher dynamical branes of the normalisation of dynamical string tension, seen in other contexts. We discuss a further possible generalisation of the matrix theory equation of state. In a special case, it is governed by $N^3$ dynamical degrees of freedom.
description: 22 pages. Latex file
Extended Holographic Rényi Entropy and hyperbolic black hole with scalar hair
Creators: name: Sun, Dao-Quan
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the extended thermodynamics of the hyperbolic black hole with scalar hair and obtain the extended holographic Rényi entropy of holographic conformal field theories with scalar hair. We analyze the behaviors of the extended holographic Rényi entropy in terms of holographic calculations. Moreover, we generalize the capacity of entanglement from the extended Rényi entropy and show that it maps to the heat capacity of the thermal conformal field theories on the hyperbolic space.
Flow-based analysis of storage usage in a low-carbon European electricity scenario
Creators: name: Tranberg, Bo
name: Schäfer, Mirko
name: Brown, Tom
name: Hörsch, Jonas
name: Greiner, Martin
Publisher: name: arXiv
Year: 2018
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The application of the flow tracing method to power flows in and out of storage units allows to analyse the usage of this technology option in large-scale interconnected electricity systems. We apply this method to a data-driven model of the European electricity network, which uses a techno-economic optimisation to determine generation and storage capacities and dispatch, assuming a 95% reduction of CO2 emission compared to 1990 levels. A flow-based analysis of the power inflow into the different storage technologies confirms the intuition that longer-term hydrogen storage is mainly utilised for wind, whereas short-term battery storage mostly receives inflow from solar power generation. The usage of storage technologies in general shows a local-but-global behaviour: Whereas on average the power outflow from these capacities is predominantly consumed locally inside the same node, when exported it is also transmitted over long distances as a global flexibility option for the entire system.
description: 15th International Conference on the European Energy Market - EEM 2018
Identification of dark axisymmetric plasma modes in partially gated two-dimensional electron gas disk
Creators: name: Cheremisin, M. V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the dark axisymmetric plasmon spectrum for partially gated two-dimensional gas of the disk shape. The extension of the central gate spot provides a change in plasmon dispersion from the root to a linear dependence on the wave vector. Intriguingly, the interaction between neighboring modes occurs because of stepwise change in carrier screening across the circumference of the gate. This behavior is unexpected when changing from a fully screened to unscreened two-dimensional gas by increasing the dielectric width under the gate [A.L.Fetter, Phys.Rev.B 33, 5221 (1986)]. Our results provide the accurate identification of axisymmetric plasmon modes recently observed in experiment and, in addition, pave the way for feedback plasmon resonator study.
description: 5 pages, 2 figures, bugs fixed
Generalized Pions in Dense QCD
Creators: name: Rho, Mannque
name: Wirzba, Andreas
name: Zahed, Ismail
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: QCD superconductors in the color-flavor-locked (CFL) phase sustain light Goldstone modes (that will be referred to as generalized pions) that can be described as pairs of particle and/or hole excitations around a gapped Fermi surface. In weak coupling and to leading logarithm accuracy, their form factor, mass and decay constant can be evaluated exactly. These modes are found to satisfy an axial-Ward-identity, constraining the mass of the Goldstone modes in the CFL phase.
description: 13 pages, 4 figures, version to be published in PLB
Extragalactic Large-Scale Structures behind the Southern Milky Way. -- II. Redshifts Obtained at the SAAO in the Crux Region
Creators: name: Fairall, A. P.
name: Woudt, P. A.
name: Kraan-Korteweg, R. C.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In our systematic optical galaxy search behind the southern Milky Way, 3760 (mostly unknown) galaxies with diameters D > 0.2 arcminutes were identified in the Crux region (287 < l < 318 degrees, |b| < 10 degrees, Woudt & Kraan-Korteweg 1997). Prior to this investigation, only 65 of these galaxies had known redshifts. In order to map the galaxy distribution in redshift space we obtained spectra for 226 bright (B_J < 18.0 mag) objects with the 1.9m telescope of the South African Astronomical Observatory (SAAO). Two main structures crossing the Galactic Plane in the Crux region have now become clear. A narrow, nearby filament from (l,b) = (340 deg, -25 deg) to the Centaurus cluster can be traced. This filament runs almost parallel to the extension of the Hydra-Antlia clusters found earlier and is part of what we have earlier termed the ``Centaurus Wall'' extending in redshift-space between 0 < v < 6000 km/s (Fairall & Paverd 1995). The main outcome of this survey however, is the recognition of another massive extended structure between 4000 < v < 8000 km/s. This broad structure, dubbed the Norma Supercluster (Woudt et al. 1997), runs nearly parallel to the Galactic Plane from Vela to ACO 3627 (its centre) from where it continues to the Pavo cluster. This massive structure is believed to be associated with the Great Attractor. The survey has furthermore revealed a set of cellular structures, similar to those seen in redshift space at higher galactic latitudes, but never before seen so clearly behind the Milky Way.
description: Accepted for publication in Astronomy & Astrophysics. 13 pages, LaTex, 6 encapsulated postscript figures, requires l-aa.sty and epsf.sty. Original figures and tables are available upon request (E-mail: wdtpat01@uctvax.uct.ac.za)
On the Jones polynomial modulo primes
Creators: name: Aiello, Valeriano
name: Baader, Sebastian
name: Ferretti, Livio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We derive an upper bound on the density of Jones polynomials of knots modulo a prime number $p$, within a sufficiently large degree range: $4/p^7$. As an application, we classify knot Jones polynomials modulo two of span up to eight.
description: 6 pages
Optimization of the nonrelativistic potential model for $b\overline{b}$ quarkonia
Creators: name: Motyka, Leszek
name: Zalewski, Kacper
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A systematic study of a wide class of nonrelativistic models of $b\overline{b}$ quarkonia is described. It is found that the potential $V(r) = 0.706380(\sqrt{r} - \frac{0.460442}{r}) + 8.81715$ (all in GeV) with the $b$-quark mass $m_b = 4.80303$ GeV gives a satisfactory description of the experimental data below the threshold for strong decays ($ χ^2/DF = 6.5/7$). Limitations and implications of this observation are discussed.
description: 9 pages, two figures available on request from authors
Relative Gorenstein flat modules and Foxby classes and their model structures
Creators: name: Bennis, Driss
name: Maaouy, Rachid El
name: Rozas, Juan Ramón García
name: Oyonarte, Luis
Publisher: name: arXiv
Year: 2022
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: Primary: 18G25. Secondary: 18N40

description: A model structure on a category is a formal way of introducing a homotopy theory on that category, and if the model structure is abelian and hereditary, its homotopy category is known to be triangulated. So a good way to both build and model a triangulated category is to build a hereditary abelian model structure. Given a ring $R$ and a (non necessarily semidualizing) left $R$-module $C$, we introduce and study new concepts of relative Gorenstein cotorsion and cotorsion modules: $\rm G_C$-cotorsion and (strongly) $\mathcal{C}_C$-cotorsion. As an application, we prove that there is a unique hereditary abelian model structure on the category of left $R$-modules, in which the cofibrations are the monomorphisms with $\rm G_C$-flat cokernel and the fibrations are the epimorphisms with $\mathcal{C}_C$-cotorsion kernel belonging to the Bass class $\mathcal{B}_C(R)$. In the second part, when $C$ is a semidualizing $(R,S)$-bimodule, we investigate the existence of abelian model structures on the category of left (resp., right) $R$-modules where the cofibrations are the epimorphisms (resp., monomorphisms) with kernel (resp., cokernel) belonging to the Bass (resp., Auslander) class $\mathcal{B}_C(R)$ (resp., $\mathcal{A}_C(R)$). We also study the class of $\rm G_C$-flat modules and the Bass class from the Auslander-Buchweitz approximation theory point of view. We show that they are part of weak AB-contexts. As the concept of weak AB-context can be dualized, we also give dual results that involve the class of $\rm G_C$-cotorsion modules and the Auslander class.
description: To appear in Journal of Algebra and Its Applications
MAPT (Tau) expression is a biomarker for an increased rate of survival in pediatric neuroblastoma
Creators: name: Zaman, Saif
name: Chobrutskiy, Boris I.
name: Blanck, George
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: 69999 Biological Sciences not elsewhere classified
subject: Marine Biology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Although the impact of MAPT (Tau) expression has been well documented for neuronal cells in the context of tauopathies and neurodegenerative diseases, the impact and role of Tau expression in cancer, and specifically cancers of neuronal origin, is in its infancy. To determine the correlation between MAPT expression and survival in pediatric neuroblastoma, MAPT gene expression for samples from the TARGET pediatric neuroblastoma dataset was assessed. Initial analyses indicated that increased MAPT expression correlated with increased overall survival in neuroblastoma but not in ovarian cancer. Expression of apoptosis- and proliferation-effector genes in the neuroblastoma samples was consistent with the MAPT related survival result. Furthermore, we determined that higher neuroblastoma expression of APP also associated with neurodegeneration, correlated with better neuroblastoma survival rates. In sum, Gene expression associated with neuronal degenerative diseases was associated with a better neuroblastoma outcome. Abbreviations: ALS: Amyotrophic Lateral Sclerosis; APP: Amyloid Precursor Protein gene; CASP3: Caspase 3 gene; CASP9: Caspase 9 gene; H2AFX: H2A histone family, member X gene; HIST1H2AL: Histone H2A type 1 gene; HIST1H2BK: Histone H2B type 1-K gene; HIST1H3J: Histone H3J gene; HIST1H4B: Histone H4B gene; HIST2H2BE: Histone H2B type 2-E gene; HUGO: human genome organization; KM: Kaplan-Meier survival curve; MAPT: Tau gene; OV: Ovarian cancer; SNCA: alpha-syneculin gene; TARDBP: Transactive response DNA binding protein 43 kDa; TCGA: the cancer genome atlas
Busted! 50 internet myths and why they are wrong
Creators: name: Kettemann, Matthias
name: Dreyer, Stephan
Publisher: name: Zenodo
Year: 2019
Subjects: Internet myths, fact checking, Internet Governance Forum 2019

description: Yes, laws matter online. No, criminals don’t all go free. And no, privacy isn’t dead – yet. As the Internet Governance Forum (IGF) 2019 approaches, Matthias C. Kettemann (HIIG and Leibniz Institute for Media Research | Hans-Bredow-Institut (HBI)) and Stephan Dreyer (HBI) have edited a book busting the 50 most common internet myths – to be published in November at the IGF. Stay tuned, we’ll publish sneak previews of the book on our blog in the coming weeks.
Klein-Maskit combination theorem for Anosov subgroups: Free products
Creators: name: Dey, Subhadip
name: Kapovich, Michael
Publisher: name: arXiv
Year: 2022
Subjects: subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 22E40, 20F65, 53C35, 14M15

description: We prove a generalization of the classical Klein-Maskit combination theorem, in the free product case, in the setting of Anosov subgroups. Namely, if $Γ_A$ and $Γ_B$ are Anosov subgroups of a semisimple Lie group $G$ of noncompact type, then under suitable topological assumptions, the group generated by $Γ_A$ and $Γ_B$ in $G$ is again Anosov, and is naturally isomorphic to the free product $Γ_A*Γ_B$. Such a generalization was conjectured in our previous article with Bernhard Leeb (arXiv:1805.07374).
description: Final version after referee's comments, 26 pages. Accepted in Math. Z
Additional file 1 of Effect of diabetes mellitus on short-term prognosis of 227 pyogenic liver abscess patients after hospitalization
Creators: name: Du, Zhaoqing
name: Zhou, Xingchen
name: Zhao, Junzhou
name: Bi, Jianbin
name: Ren, Yifan
name: Zhang, Jia
name: Lin, Yuxin
name: Wu, Zheng
name: Lv, Yi
name: Zhang, Xufeng
name: Wu, Rongqian
Publisher: name: figshare
Year: 2020
Subjects: Space Science
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Science Policy

description: Additional file 1: Table S1. Flowchart for selection of 227 PLA patients in this study.
MicroShare: Privacy-Preserved Medical Resource Sharing through MicroService Architecture
Creators: name: Yang, Yilong
name: Zu, Quan
name: Liu, Peng
name: Ouyang, Defang
name: Li, Xiaoshan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: This paper takes up the problem of medical resource sharing through MicroService architecture without compromising patient privacy. To achieve this goal, we suggest refactoring the legacy EHR systems into autonomous MicroServices communicating by the unified techniques such as RESTFul web service. This lets us handle clinical data queries directly and far more efficiently for both internal and external queries. The novelty of the proposed approach lies in avoiding the data de-identification process often used as a means of preserving patient privacy. The implemented toolkit combines software engineering technologies such as Java EE, RESTful web services, JSON Web Tokens to allow exchanging medical data in an unidentifiable XML and JSON format as well as restricting users to the need-to-know principle. Our technique also inhibits retrospective processing of data such as attacks by an adversary on a medical dataset using advanced computational methods to reveal Protected Health Information (PHI). The approach is validated on an endoscopic reporting application based on openEHR and MST standards. From the usability perspective, the approach can be used to query datasets by clinical researchers, governmental or non-governmental organizations in monitoring health care and medical record services to improve quality of care and treatment.
description: Extended from our conference paper: arXiv:1501.05916
State engineering of impurities in a lattice by coupling to a Bose gas
Creators: name: Keiler, Kevin
name: Schmelcher, Peter
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the localization pattern of interacting impurities, which are trapped in a lattice potential and couple to a Bose gas. For small interspecies interaction strengths, the impurities populate the energetically lowest Bloch state or localize separately in different wells with one extra particle being delocalized over all the wells, depending on the lattice depth. In contrast, for large interspecies interaction strengths we find that due to the fractional filling of the lattice and the competition of the repulsive contact interaction between the impurities and the attractive interaction mediated by the Bose gas, the impurities localize either pairwise or completely in a single well. Tuning the lattice depth, the interspecies and intraspecies interaction strength correspondingly allows for a systematic control and engineering of the two localization patterns. The sharpness of the crossover between the two states as well as the broad region of their existence supports the robustness of the engineering. Moreover, we are able to manipulate the ground state's degeneracy in form of triplets, doublets and singlets by implementing different boundary conditions, such as periodic and hard wall boundary conditions.
description: 18 pages, 5 figures
Estimate of the Three-Loop Perturbative Contribution to Inclusive Semileptonic b to u Decays
Creators: name: Ahmady, M. R.
name: Chishtie, F. A.
name: Elias, V.
name: Steele, T. G.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We utilize asymptotic Pade-approximant methods to estimate the three-loop order MS bar-scheme coefficients within the inclusive semileptonic b to u decay rate for four and five active quark flavours. The estimates we obtain for the three renormalization-group-accessible coefficients within the three-loop contribution are all found to be within 5.1% of their true values, using a least-squares procedure in conjunction with an asymptotic Pade-approximant estimate of the three-loop term over the entire $μ\ge m_b$ domain. Given the input values $α_s(M_Z) = 0.118 \pm 0.004$ and $m_b(m_b) =4.17 \pm 0.05 GeV$, the three-loop expression for the purely-perturbative contribution to the decay rate is minimally sensitive to renormalization scale at $μ= 1.775 GeV$, at which scale the three-loop contribution is estimated to be only 1.4% of the leading tree-order contribution. We estimate the full perturbative decay rate to be $192π^3Γ(b\to u\barν_\ell\ell^-)/(G_F^2| V_{ub}|^2) = 2070 {\rm GeV^5} \pm 16%$, inclusive of theoretical uncertainties from series truncation, the input parameters, and the estimation procedure.
description: latex2e, 10 pages, three embedded eps figures. Extended analysis in revised version
Data-Driven Estimation of Capacity Upper Bounds
Creators: name: Häger, Christian
name: Agrell, Erik
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We consider the problem of estimating an upper bound on the capacity of a memoryless channel with unknown channel law and continuous output alphabet. A novel data-driven algorithm is proposed that exploits the dual representation of capacity where the maximization over the input distribution is replaced with a minimization over a reference distribution on the channel output. To efficiently compute the required divergence maximization between the conditional channel and the reference distribution, we use a modified mutual information neural estimator that takes the channel input as an additional parameter. We numerically evaluate our approach on different memoryless channels and show empirically that the estimated upper bounds closely converge either to the channel capacity or to best-known lower bounds.
description: 5 pages, 5 figures, to appear in IEEE Communication Letters
Responses of mangrove ecosystems to coastal changes
Creators: name: Lemenkova, Polina
Publisher: name: figshare
Year: 2018
Subjects: subject: 50204 Environmental Impact Assessment
subject: FOS: Earth and related environmental sciences

description: The research aim is to apply methods of GIS-based spatial analysis for modelling, quantitative estimation of the crucial thresholds for losses and changes in the mangrove ecosystems of north-eastern Australia, Queensland, as well as qualitative analysis of the impact of coastal changes on the mangrove sustainable development, and forecasting the possible scenarios in their future dynamics. The spatial analysis includes the classification of the research area into different zones by means of the environmental conditions and dynamics of the coastal areas to investigate the spatial patterns of the species diversity in the mangrove ecosystems. Spatial analysis of the dynamics in coastal zones enables to model scenarios in the behaviour and adaptation of the mangrove trees towards the changing environmental conditions in the coastal areas, to estimate the consequences in the development of the coastal zones, and finally to assess the capability of the mangrove ecosystems to resist the negative impacts caused by their buffer location between the marine and terrestrial areas. The dynamics of the changes will be studied using raster processing of the satellite images, and cover research period of approximately 40 years: since early 1970-s up to the latest time.
Proof of $A_{n}$ AGT conjecture at $β=1$
Creators: name: Yuan, Qing-Jie
name: Hu, Shao-Ping
name: Huang, Zi-Hao
name: Zhang, Kilar
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: AGT conjecture reveals a connection between 4D $\mathcal{N}=2$ gauge theory and 2D conformal field theory. Though some special instances have been proven, others remain elusive and the attempts on its full proof never stop. When the $Ω$ background parameters satisfy $-ε_1/ε_2\equiv β=1$, the story simplifies a bit. A proof of the correspondence in the case of $A_{1}$ gauge group was given in 2010 by Mironov et al., while the $A_{n}$ extension is verified by Matsuo and Zhang in 2011, with an assumption on the Selberg integral of $n+1$ Schur polynomials. Then in 2020, Albion et al. obtained the rigorous result of this formula. In this paper, we show that their result is equivalent to the conjecture on Selberg integral of Schur polynomials, thus leading to the proof of the $A_{n}$ case at $β=1$. To perform a double check, we also directly start from this formula, and manage to show the identification between the two sides of AGT correspondence.
description: 25 pages, 2 figures; v2: typos corrected, references added
Valley-projected edge modes observed in underwater sonic crystals
Creators: name: Shen, Yuanyuan
name: Qiu, Chunyin
name: Cai, Xiangxi
name: Ye, Liping
name: Lu, Jiuyang
name: Ke, Manzhu
name: Liu, Zhengyou
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recently, the topological physics in acoustics has been attracting much attention. However, all the studies are aimed to elastic or airborne sound systems. Realizing topological insulators for underwater sound is of great importance, since water is another crucial sound medium in addition to solid and air. Here we report an experimental study on the valley-projected edge states for underwater sound. The edge states are directly observed in our ultrasound scanning experiments, together with a solid evidence for the valley-selective excitation. The experimental data agree well with our numerical results. Prospective applications can be anticipated, such as for underwater sound signal processing and ocean noise control.
description: 5 figures
Word differences in news media of lower and higher peace countries revealed by natural language processing and machine learning
Creators: name: Liebovitch, Larry S.
name: Powers, William
name: Shi, Lin
name: Chen-Carrel, Allegra
name: Loustaunau, Philippe
name: Coleman, Peter T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Language is both a cause and a consequence of the social processes that lead to conflict or peace. Hate speech can mobilize violence and destruction. What are the characteristics of peace speech that reflect and support the social processes that maintain peace? This study used existing peace indices, machine learning, and on-line, news media sources to identify the words most associated with lower-peace versus higher-peace countries. As each peace index measures different social properties, there is little consensus on the numerical values of these indices. There is however greater consensus with these indices for the countries that are at the extremes of lower-peace and higher-peace. Therefore, a data driven approach was used to find the words most important in distinguishing lower-peace and higher-peace countries. Rather than assuming a theoretical framework that predicts which words are more likely in lower-peace and higher-peace countries, and then searching for those words in news media, in this study, natural language processing and machine learning were used to identify the words that most accurately classified a country as lower-peace or higher-peace. Once the machine learning model was trained on the word frequencies from the extreme lower-peace and higher-peace countries, that model was also used to compute a quantitative peace index for these and other intermediate-peace countries. The model successfully yielded a quantitative peace index for intermediate-peace countries that was in between that of the lower-peace and higher-peace, even though they were not in the training set. This study demonstrates how natural language processing and machine learning can help to generate new quantitative measures of social systems, which in this study, were linguistic differences resulting in a quantitative index of peace for countries at different levels of peacefulness.
description: 21 pages, 4 figures
The limb-brightened jet of M87 down to 7 Schwarzschild radii scale
Creators: name: Kim, J. -Y.
name: Krichbaum, T. P.
name: Lu, R. -S.
name: Ros, E.
name: Bach, U.
name: Bremer, M.
name: de Vicente, P.
name: Lindqvist, M.
name: Zensus, J. A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: M87 is one of the nearest radio galaxies with a prominent jet extending from sub-pc to kpc-scales. Because of its proximity and large mass of the central black hole, it is one of the best radio sources to study jet formation. We aim at studying the physical conditions near the jet base at projected separations from the BH of $\sim7-100$ Schwarzschild radii ($R_{\rm sch}$). Global mm-VLBI Array (GMVA) observations at 86 GHz ($λ=3.5\,$mm) provide an angular resolution of $\sim50μ$as, which corresponds to a spatial resolution of only $7~R_{\rm sch}$ and reach the small spatial scale. We use five GMVA data sets of M87 obtained during 2004--2015 and present new high angular resolution VLBI maps at 86GHz. In particular, we focus on the analysis of the brightness temperature, the jet ridge lines, and the jet to counter-jet ratio. The imaging reveals a parabolically expanding limb-brightened jet which emanates from a resolved VLBI core of $\sim(8-13) R_{\rm sch}$ size. The observed brightness temperature of the core at any epoch is $\sim(1-3)\times10^{10}\,$K, which is below the equipartition brightness temperature and suggests magnetic energy dominance at the jet base. We estimate the diameter of the jet at its base to be $\sim5 R_{\rm sch}$ assuming a self-similar jet structure. This suggests that the sheath of the jet may be anchored in the very inner portion of the accretion disk. The image stacking reveals faint emission at the center of the edge-brightened jet on sub-pc scales. We discuss its physical implication within the context of the spine-sheath structure of the jet.
description: 13 pages, 12 figures, accepted for a publication in A&A
Spin structure and longitudinal polarization of hyperon in e+e- annihilation at high energies
Creators: name: Liu, Chun-xiu
name: Liang, Zuo-tang
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Longitudinal polarizations of different kinds of hyperons produced in e+e- annihilation at LEP I and LEP II energies in different event samples are calculated using two different pictures for the spin structure of hyperon: that drawn from polarized deep inelastic lepton-nucleon scattering data or that using SU(6) symmetric wave functions. The result shows that measurements of such polarizations should provide useful information to the question of which picture is more suitable in describing the spin effects in the fragmentation processes.
description: 26 pages with 10 figures. Submitted to Phys. Rev. D
Polarization Tracking in the Presence of PDL and Fast Temporal Drift
Creators: name: Farsi, Mohammad
name: Häger, Christian
name: Karlsson, Magnus
name: Agrell, Erik
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we analyze the effectiveness of polarization tracking algorithms in optical transmission systems suffering from fast state of polarization (SOP) rotations and polarization-dependent loss (PDL). While most of the gradient descent (GD)-based algorithms in the literature may require step size adjustment when the channel condition changes, we propose tracking algorithms that can perform similarly or better without parameter tuning. Numerical simulation results show higher robustness of the proposed algorithms to SOP and PDL drift compared to GD-based algorithms, making them promising candidates to be used in aerial fiber links where the SOP can potentially drift rapidly, and therefore becomes challenging to track.
Spherical accretion by normal and phantom Einstein--Maxwell--dilaton black holes
Creators: name: Azreg-Aïnou, Mustapha
name: Ahmed, Ayyesha K.
name: Jamil, Mubasher
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the spherical accretion process for general static spherically symmetric fluids. We analyze this process by using the general metric ansatz for spherically symmetric black holes. We specialize to the case of normal and phantom isothermal fluids and investigate their accretion process onto normal and phantom Einstein-Maxwell-dilaton black holes. Backreaction effects are discussed.
description: 18 pages, 2 figures, minor corrections, references added
STUDY OF J/PSI THREE-BODY DECAYS INVOLVING BARYONS
Creators: name: KADA, El-Hassan
name: PARISI, Joseph
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The $J/Ψ$ decay into a baryon pair and a pseudoscalar meson is computed, for some channels, in lowest order in perturbative QCD, modeling the baryon with a quark-diquark system. We use a set of parameters that has been proposed by some authors in order to fit the proton magnetic form factor $G^{p}_{M}$, the angular distribution of protons in the process $γγ\to p \bar{p}$ and the width of $η_{c} \to γγ$.
description: Plain Latex file, 10 pages; 1 figure appended as a uuencoded file; Keywords : Charmonium, Baryons, Paiar production, Particle Structure.
Spatial GIS-analysis of the long-term dynamics in the environmental changes in reindeer pastures, Lapland, northern Finland
Creators: name: Lemenkova, Polina
Publisher: name: figshare
Year: 2018
Subjects: Geography

description: Research Proposal for the Research Stay at the Arctic Centre, University of Lapland under the CIMO Scholarship. Reindeer are unique part of the northern environmental in Lapland. For the comfortable existing they need large areas of herding pastures for grazing. The anthropogenic activities may influence the ecosystems where pastures are based in a negative way: mining, logging, oil and gas exploration, hydro power development as well as other human activities encroaching to the traditional habitats of reindeers and threatening the herding areas. Finally, climate changes influence natural environment and biodiversity of the northern ecosystems. All these factors lead to negative changes in the structure of landscapes, patterns defragmentation, decrease of biodiversity, and worsening of life conditions for the reindeer existence. The dynamics of these changes must be evaluated for the monitoring and sustainable development of the unique Lappish landscapes in the northern Finland. The proposed research focuses on the spatial GIS analysis and raster-based mapping of the changes in landscapes and land cover in the areas of reindeer herding pastures in High Arctic (Finnish Lapland).
El mediodía vigil, nuestro mediodía particular
Creators: name: Martín Olalla, José María
Publisher: name: Politikon
Year: 2016
Subjects: Encuesta de Empleo del Tiempo
Ciclo de sueño/vigilia
Punto medio del sueño

description: Se introduce el punto medio del ciclo de sueño/vigilia (mediodía vigil) y se analiza su correlación con la latitud y el día invernal.

 

Publicado originalmente en Politikon el 5 de enero del año 2016

 

https://politikon.es/2016/01/05/el-mediodia-vigil-nuestro-mediodia-particular/
Visual investigation of possible degradation in GEM foil under test
Creators: name: Chatterjee, S.
name: Sen, A.
name: Das, S.
name: Biswas, S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Visual investigation of a Single Mask (SM) Gas Electron Multiplier (GEM) foil, showing small resistance~($\sim$ 40 k$Ω$), is performed manually using an optical microscope. The GEM foil is scanned and the different imperfections in the foil are identified. Different techniques are used to clean the GEM foil to remove the short paths created between the GEM electrodes. The details of the method used for cleaning the GEM foil and the result of leakage current measurement after the cleaning of the foil are discussed in this article.
Carnet nº 28, commencé à Bugel (p. 18)
Creators: name: Péraire, Lucien
name: CNRS
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2023

description: created: 31-3-1932
Soft Dipole Pomeron in hadronic elastic and in deep inelastic scattering
Creators: name: Martynov, E.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A brief review on the Dipole Pomeron model is given. The model not only describes data on hadron-hadron interactions, but also allows to describe data on the proton structure function with a $Q^2$ independent intercept. Moreover the chosen Dipole Pomeron has an intercept equal to one and does not violate unitarity limit on the total elastic cross-section.
description: 4 pages, latex, 5 eps figures. Talk given at the International Conference on Elastic and Difractive Scattering (YIIIth "Blois Workshop"), 28 June - 2 July 1999, Protvino, Russia. To be published in Proceedings of the Conference
Taseko Prosperity Gold-Copper Mine Project (British Columbia, Canada)
Creators: name: Lemenkova, Polina
Publisher: name: figshare
Year: 2018
Subjects: subject: 50206 Environmental Monitoring
subject: FOS: Earth and related environmental sciences
subject: 50205 Environmental Management

description: This is a Student Work (part of the MSc GEM), assignment for the Module 12A: Environmental Management and Policy in Central Europe. Paper focuses on the environmental problems of the Taseko Mines Gold-Copper Mine, located in Canada, British Columbia, 125 km south-west of Williams Lake.
Transverse Lattice Approach to Light-Front Hamiltonian QCD
Creators: name: Dalley, S.
name: van de Sande, B.
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We describe a non-perturbative procedure for solving from first principles the light-front Hamiltonian problem of SU(N) pure gauge theory in D spacetime dimensions (D>2), based on enforcing Lorentz covariance of observables. A transverse lattice regulator and colour-dielectric link fields are employed, together with an associated effective potential. We argue that the light-front vacuum is necessarily trivial for large enough lattice spacing, and clarify why this leads to an Eguchi-Kawai dimensional reduction of observables to 1+1-dimensions in the infinite N limit. The procedure is then tested by explicit calculations for 2+1-dimensional SU(infinity) gauge theory, within a first approximation to the lattice effective potential. We identify a scaling trajectory which produces Lorentz covariant behaviour for the lightest glueballs. The predicted masses, in units of the measured string tension, are in agreement with recent results from conventional Euclidean lattice simulations. In addition, we obtain the potential between heavy sources and the structure of the glueballs from their light-front wavefunctions. Finally, we briefly discuss the extension of these calculations to 3+1-dimensions.
description: 55 pages, uses macro boxedeps.tex, minor corrections in revised version
Detection of Network Structure in the Las Campanas Redshift Survey
Creators: name: Shandarin, Sergei F.
name: Yess, Capp
Publisher: name: arXiv
Year: 1997
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We employ a percolation technique developed for pointwise distributions to analyze two-dimensional projections of the three northern and three southern slices in the Las Campanas Redshift Survey. One of the goals of this paper is to compare the visual impressions of the structure within distributions with objective statistical analysis. We track the growth of the largest cluster as an indicator of the network structure. We restrict our analysis to volume limited subsamples in the regions from 200 to 400 Mpc/h where the number density of galaxies is the highest. As a major result, we report a measurement of an unambiguous signal, with high signal-to-noise ratio (at least at the level of a few $σ$), indicating significant connectivity of the galaxy distribution which in two dimensions is indicative of a filamentary distribution. This is in general agreement with the visual impression and typical for the standard theory of the large-scale structure formation based on gravitational instability of initially Gaussian density fluctuations.
description: The main body of the text (17 pages) is followed by the captions file plus 4 postscript figures. Submitted to ApJ
Relating Kerr SMBHs in Active Galactic Nuclei to RAD configurations
Creators: name: Pugliese, D.
name: Stuchlik, Z.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: There is strong observational evidence that many active galactic nuclei (AGNs) harbour supermassive black holes (SMBHs), demonstrating multi-accretion episodes during their lifetime. In such AGNs, corotating and counterrotating tori, or strongly misaligned disks, as related to the central SMBH spin, can report traces of the AGNs evolution. Here we concentrate on aggregates of accretion disks structures, ringed accretion disks (RADs) orbiting a central Kerr SMBH, assuming that each torus of the RADs is centered in the equatorial plane of the BH, tori are coplanar and axisymmetric. Many RAD aspects are governed mostly by the Kerr geometry spin. We classify Kerr BHs due to their dimensionless spin, according to possible combinations of corotating and counterrotating equilibrium or accreting tori composing the RADs. The number of accreting tori in RADs cannot exceed n=2. We present list of 14 characteristic values of the BH spin a governing the classification in the BH range 0
description: 36 double columns pages, 6 tables, 13 multi-panels figure. Minor typos corrected to match the published version
Large CP Phases and the Cancellation Mechanism in EDMs in SUSY, String and Brane Models
Creators: name: Ibrahim, Tarek
name: Nath, Pran
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that EDMs obey a simple approximate scaling under the transformation $m_0\to λm_0,m_{1/2}\to λm_{1/2}$ in the large $μ$ region when $μ$ itself obeys the same scaling, ie., $μ\to λμ$. In the scaling region the knowledge of a single point in the MSSM parameter space where the cancellation in the EDMs occur allows one to generate a trajectory in the $m_0-m_{1/2}$ plane where the cancellation mechanism holds and the EDMs are small. We illustrate these results for MSSM with radiative electro-weak symmetry breaking constraints. We also discuss a class of D brane models based on Type IIB superstring compactifications which have non-universal phases in the gaugino mass sector and allow large CP violating phases consistent with the EDM constraints through the cancellation mechanism. The scaling in these D brane models and in a heterotic string model is also discussed.
description: Minor changes in text. This version to appear in Physical Review D. 18 pages, 9 figs