cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
UV-FIR SED modeling of AGN in IR-luminous galaxies up to z~2.5: Understanding the effects of torus models
Creators: name: Sokol, Alyssa D.
name: Yun, M.
name: Pope, A.
name: Kirkpatrick, A.
name: Cooke, K.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: UV-FIR SED modeling is an effective way to disentangle emission between star formation (SF) and active galactic nuclei (AGN) in galaxies; however, this approach becomes uncertain for composite AGN/SF galaxies that comprise 50-70% of IR-samples. Cosmic X-ray background (XRB) models require a large fraction of obscured AGN to reproduce the observed XRB peak, motivating reliable SED analyses in objects where the AGN may be ``buried" in the galaxy and in the mid-IR to far-IR SED. In this paper, we study a 24$μ$m-selected ($S_{24}$ > 100$μ$Jy) sample of 95 galaxies with $0 \% < f_{MIR,AGN} < 100 \%$, 0.4 < z < 2.7, and $10^{11}$L$_{\odot}$ < L$_{IR}$ < $10^{13}$L$_{\odot}$. We test the performance of AGN models ranging in torus optical depth via SED fitting, comparing results with Spitzer MIR spectroscopy and X-ray observations. Best-fit torus optical depth can shed light on whether these galaxies host a luminous obscured AGN population. We find that permitting a broader AGN SED parameter space results in improved fit quality with higher optical depths, higher FIR AGN contributions, and higher $L_{Bol}$, impacting the bright-end of the $L_{Bol}$ luminosity function. Our results suggest there may be a population of dust-obscured composites that are bolometrically significant but have their AGN mostly hidden in the mid-IR SED. If so, literature applications of SED fitting that often simplify AGN models or omit optically thick tori may largely underestimate AGN contribution from composite sources, as these sources are both numerous and have solutions sensitive to the assumed range of AGN models.
description: 20 pages, 10 figures
GRASIL-3D: an Implemention of Dust Effects in the SEDs of Simulated Galaxies
Creators: name: Domínguez-Tenreiro, R.
name: Obreja, A.
name: Granato, G. L.
name: Schurer, A.
name: Alpresa, P.
name: Silva, L.
name: Brook, C. B.
name: Serna, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We introduce a new model for the spectral energy distribution of galaxies, GRASIL-3D, which includes a careful modelling of the dust component of the interstellar medium. GRASIL-3D is an entirely new model based on the formalism of an existing and widely applied spectrophotometric model, GRASIL, but specifically designed to be interfaced with galaxies with any arbitrarily given geometry, such as galaxies calculated by theoretical hydrodynamical galaxy formation codes. GRASIL-3D is designed to separately treat radiative transfer in molecular clouds and in the diffuse cirrus component. The code has a general applicability to the outputs of simulated galaxies, either from Lagrangian or Eulerian hydrodynamic codes. As an application, the new model has been interfaced to the P-DEVA and GASOLINE smoothed-particle hydrodynamic codes, and has been used to calculate the spectral energy distribution for a variety of simulated galaxies from UV to sub-millimeter wavelengths, whose comparison with observational data gives encouraging results. In addition, GRASIL-3D allows 2D images of such galaxies to be obtained, at several angles and in different bands.
description: 24 pages, 13 Figures and 6 Tables. Accepted in MNRAS
First measurement of $σ_8$ using supernova magnitudes only
Creators: name: Castro, Tiago
name: Quartin, Miguel
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A method was recently proposed which allows the conversion of the weak-lensing effects in the supernova Hubble diagram from noise into signal. Such signal is sensitive to the growth of structure in the universe, and in particular can be used as a measurement of $σ_8$ which is independent from more traditional methods such as those based on the CMB, cosmic shear or cluster abundance. We extend here that analysis to allow for intrinsic non-Gaussianities in the supernova PDF, and discuss how this can be best modelled using the Bayes Factor. Although it was shown that a precise measurement of $σ_8$ requires ~$10^5$ supernovae, current data already allows an important proof of principle. In particular we make use of the 732 supernovae with z < 1 of the recent JLA catalog and show that a simple treatment of intrinsic non-Gaussianities with a couple of nuisance parameters is enough for our method to yield the values $σ_8 = 0.84^{+0.28}_{-0.65}$ or $σ_8 < 1.45$ at a $2σ$ confidence level. This result is consistent with mock simulations and it is also in agreement with independent measurements and presents the first ever measurement of $σ_8$ using supernova magnitudes alone.
description: 6 pages, 3 figures, 2 tables. Revision to the introduction and references added. Matches version to appear in MNRAS Letters
Characterising SMSS J2157--3602, the most luminous known quasar, with accretion disc models
Creators: name: Lai, Samuel
name: Wolf, Christian
name: Onken, Christopher
name: Bian, Fuyan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We develop an accretion disc (AD) fitting method, utilising thin and slim disc models and Bayesian inference with the Markov-Chain Monte-Carlo approach, testing it on the most luminous known quasar, SMSS J215728.21-360215.1, at redshift $z=4.692$. With a spectral energy distribution constructed from near-infrared spectra and broadband photometry, the AD models find a black hole mass of $\log(M_{\rm{AD}}/M_{\odot}) = 10.31^{+0.17}_{-0.14}$ with an anisotropy-corrected bolometric luminosity of $\log{(L_{\rm{bol}}/\rm{erg\,s^{-1}})} = 47.87 \pm 0.10$, and derive an Eddington ratio of $0.29^{+0.11}_{-0.10}$ as well as a radiative efficiency of $0.09^{+0.05}_{-0.03}$. Using the near-infrared spectra, we estimate the single-epoch virial black hole mass estimate to be $\log(M_{\rm{SE}}/M_{\odot}) = 10.33 \pm 0.08$, with a monochromatic luminosity at 3000Å of $\log{(L(\rm{3000\textÅ})/\rm{erg\,s^{-1}})} = 47.66 \pm 0.01$. As an independent approach, AD fitting has the potential to complement the single-epoch virial mass method in obtaining stronger constraints on properties of massive quasar black holes across a wide range of redshifts.
description: 18 pages, 7 figures, 3 tables
Radiation effect on MHD flow through porous medium past a verticalplate with time dependent surface temperature and concentration
Creators: name: Sachidananda Sahoo
name: Prasanna Kumar Rout
name: Gouranga Charana Dash
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2022
Subjects: MHD flow
thermal radiation
chemical reaction
porous matrix
variable surface temperature

description: Songklanakarin Journal of Science an Technology (SJST), 44, 3, 698-707
The traces of anisotropic dark energy in light of Planck
Creators: name: Cardona, Wilmar
name: Hollenstein, Lukas
name: Kunz, Martin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study a dark energy model with non-zero anisotropic stress, either linked to the dark energy density or to the dark matter density. We compute approximate solutions that allow to characterise the behaviour of the dark energy model and to assess the stability of the perturbations. We also determine the current limits on such an anisotropic stress from the cosmic microwave background data by the Planck satellite, and derive the corresponding constraints on the modified growth parameters like the growth index, the effective Newton's constant and the gravitational slip.
description: 29 pages, 10 figures; matches version accepted for publication in JCAP
Does Turbulence along the Coronal Current Sheet Drive Ion Cyclotron Waves?
Creators: name: Telloni, Daniele
name: Zank, Gary P.
name: Adhikari, Laxman
name: Zhao, Lingling
name: Susino, Roberto
name: Antonucci, Ester
name: Fineschi, Silvano
name: Stangalini, Marco
name: Grimani, Catia
name: Sorriso-Valvo, Luca
name: Verscharen, Daniel
name: Marino, Raffaele
name: Giordano, Silvio
name: D'Amicis, Raffaella
name: Perrone, Denise
name: Carbone, Francesco
name: Liberatore, Alessandro
name: Bruno, Roberto
name: Zimbardo, Gaetano
name: Romoli, Marco
name: Andretta, Vincenzo
name: Da Deppo, Vania
name: Heinzel, Petr
name: Moses, John D.
name: Naletto, Giampiero
name: Nicolini, Gianalfredo
name: Spadaro, Daniele
name: Teriaca, Luca
name: Burtovoi, Aleksandr
name: De Leo, Yara
name: Jerse, Giovanna
name: Landini, Federico
name: Pancrazzi, Maurizio
name: Sasso, Clementina
name: Slemer, Alessandra
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Evidence for the presence of ion cyclotron waves, driven by turbulence, at the boundaries of the current sheet is reported in this paper. By exploiting the full potential of the joint observations performed by Parker Solar Probe and the Metis coronagraph on board Solar Orbiter, local measurements of the solar wind can be linked with the large-scale structures of the solar corona. The results suggest that the dynamics of the current sheet layers generates turbulence, which in turn creates a sufficiently strong temperature anisotropy to make the solar-wind plasma unstable to anisotropy-driven instabilities such as the Alfvén ion-cyclotron, mirror-mode, and firehose instabilities. The study of the polarization state of high-frequency magnetic fluctuations reveals that ion cyclotron waves are indeed present along the current sheet, thus linking the magnetic topology of the remotely imaged coronal source regions with the wave bursts observed in situ. The present results may allow improvement of state-of-the-art models based on the ion cyclotron mechanism, providing new insights into the processes involved in coronal heating.
description: 12 pages
Criterion for stability of Goldstone Modes and Fermi Liquid behavior in a metal with broken symmetry
Creators: name: Watanabe, Haruki
name: Vishwanath, Ashvin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: There are few general physical principles that protect the low energy excitations of a quantum phase. Of these, Goldstone's theorem and Landau Fermi liquid theory are the most relevant to solids. We investigate the stability of the resulting gapless excitations - Nambu Goldstone bosons (NGBs) and Landau quasiparticles - when coupled to one another, which is of direct relevance to metals with a broken continuous symmetry. Typically, the coupling between NGBs and Landau quasiparticles vanishes at low energies leaving the gapless modes unaffected. If however the low energy coupling is non-vanishing, non-Fermi liquid behavior and overdamped bosons are expected. Here we prove a general criterion which specifies when the coupling is non-vanishing. It is satisfied by the case of a nematic Fermi fluid, consistent with earlier microscopic calculations. In addition, the criterion identifies a new kind of symmetry breaking - of magnetic translations - where non-vanishing couplings should arise, opening a new route to realizing non-Fermi liquid phases.
description: 6 pages + 10 pages (Supplemental Material), 3 + 2 figures; v2:revised for clarity
Analytical approach to study water infiltration phenomenonin unsaturated soils using reduced differential transform method
Creators: name: Patel Yogeshwari
name: Jayesh M Dhodiya
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2022
Subjects: richards equation
reduced differential transform method
infiltration phenomena
analytical solution
convergence
error analysis

description: Songklanakarin Journal of Science an Technology (SJST), 44, 3, 708-719
Limits on compression of cosmic rays in supernova remnants
Creators: name: Sushch, Iurii
name: Brose, Robert
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The spectral shape of the gamma-ray emission observed for dynamically old supernova remnants that interact with molecular clouds triggered an exciting scenario of adiabatic compression and farther re-acceleration of Galactic cosmic rays (GCRs) in radiative shells of the remnants, which was extensively discussed and applied to various sources over recent years. Indeed, the observed gamma-ray spectrum from a number of remnants strongly resembles the expected spectrum of the gamma-ray emission from the compressed population of Galactic cosmic rays. In the following we discuss the feasibility of this scenario and show that it is very unlikely that compressed GCRs could produce sufficient amount of gamma-rays and that the observed spectral shape is putting strong limits on the allowed compression factors. Further, absence of curvature in featureless power-law spectra of evolved supernova remnants at radio wavelengths is strongly disfavoring the compression scenario for electrons and hence for hadrons. Our calculations show that the contribution of compressed electrons to the observed radio-flux could reach at most ~10%.
description: 8 pages, 3 figures, accepted for publication in MNRAS
Determination of the stature and gender by using hand dimensions
Creators: name: Mohite, Hemlata
name: Mohite, Sandeep
name: Roy, Priya
name: Doshi, Megha
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2022
Subjects: hand dimensions
forensic anthropometry
stature
gender
Indian population

description: Songklanakarin Journal of Science an Technology (SJST), 44, 3, 720-727
Solar coronal magnetic field measurements using spectral lines available in Hinode/EIS observations: Strong and weak field techniques and temperature diagnostics
Creators: name: Chen, Yajie
name: Bai, Xianyong
name: Tian, Hui
name: Li, Wenxian
name: Chen, Feng
name: Yang, Zihao
name: Yang, Yang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recently, it has been proposed that the magnetic-field-induced transition (MIT) in Fe X can be used to measure coronal magnetic field strengths. Several techniques, the direct line ratio technique and the weak and strong magnetic field techniques, are developed to apply the MIT theory to spectroscopic observations taken by EUV Imaging Spectrometer (EIS) onboard Hinode. However, the suitability of coronal magnetic field measurements based on the weak and strong magnetic field techniques has not been evaluated. Besides, temperature diagnostics is also important for measuring coronal magnetic field based on the MIT theory, but how to determine the accurate formation temperature of the Fe X lines from EIS observations still needs investigation. In this study, we synthesized emissions of several spectral lines from a 3D radiation magnetohydrodynamic model of a solar active region, and then derived magnetic field strengths using different methods. We first compared the magnetic field strengths derived from the weak and strong magnetic field techniques to the values in the model. Our study suggests that both weak and strong magnetic field techniques underestimate the coronal magnetic field strength. Then we developed two methods to calculate the formation temperature of the Fe X lines. One is based on differential emission measure analyses, and the other is deriving temperature from the Fe IX and Fe XI line pairs. However, neither of the two methods can provide temperature determination for accurate coronal magnetic field measurements as those derived from the Fe X 174/175 and 184/345 Å line ratios. More efforts are still needed for accurate coronal magnetic field measurements using EIS observations.
description: Accepted for publication in MNRAS
Scanning Tunneling Macroscopy, Black Holes, and AdS/CFT Bulk Locality
Creators: name: Rey, Soo-Jong
name: Rosenhaus, Vladimir
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We establish resolution bounds on reconstructing a bulk field from boundary data on a timelike hypersurface. If the bulk only supports propagating modes, reconstruction is complete. If the bulk also supports evanescent modes, local reconstruction is not achievable unless one has exponential precision in knowledge of the boundary data. Without exponential precision, for a Minkowski bulk, one can reconstruct a spatially coarse-grained bulk field, but only out to a depth set by the coarse-graining scale. For an asymptotically AdS bulk, reconstruction is limited to a spatial coarse-graining proper distance set by the AdS scale. AdS black holes admit evanescent modes. We study the resolution bound in the large AdS black hole background and provide a dual CFT interpretation. Our results demonstrate that, if there is a black hole of any size in the bulk, then sub-AdS bulk locality is no longer well-encoded in boundary data in terms of local CFT operators. Specifically, in order to probe the bulk on sub-AdS scales using only boundary data in terms of local operators, one must either have such data to exponential precision or make further assumptions about the bulk state.
description: 27 pages + appendix, 8 figures
de Sitter Vacua in Type IIB String Theory: Classical Solutions and Quantum Corrections
Creators: name: Dasgupta, Keshav
name: Gwyn, Rhiannon
name: McDonough, Evan
name: Mia, Mohammed
name: Tatar, Radu
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We revisit the classical theory of ten-dimensional two-derivative gravity coupled to fluxes, scalar fields, D-branes, anti D-branes and Orientifold-planes. We show that such set-ups do not give rise to a four-dimensional positive curvature spacetime with the isometries of de Sitter spacetime. We further argue that a de Sitter solution in type IIB theory may still be achieved if the higher-order curvature corrections are carefully controlled. Our analysis relies on the derivation of the de Sitter condition from an explicit background solution by going beyond the supergravity limit of type IIB theory. As such this also tells us how the background supersymmetry should be broken and under what conditions D-term uplifting can be realized with non self-dual fluxes.
description: 44 pages, pdfLaTex; v2: Arguments in sec 3.2 more streamlined, figure removed, discussions on quantum corrections elaborated, typos corrected and references added; v3: Improved discussions on the O-planes contributions. Conclusions unchanged. Final version to appear in JHEP
Low-temperature specific heat and heat transport of Tb$_2$Ti$_{2-x}$Zr$_x$O$_7$ single crystals
Creators: name: Che, H. L.
name: Li, S. J.
name: Wu, J. C.
name: Li, N.
name: Guang, S. K.
name: Xia, K.
name: Yue, X. Y.
name: Wang, Y. Y.
name: Zhao, X.
name: Li, Q. J.
name: Sun, X. F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report a study on the specific heat and heat transport of Tb$_2$Ti$_{2-x}$Zr$_x$O$_7$ ($x =$ 0, 0.02, 0.1, 0.2, and 0.4) single crystals at low temperatures and in high magnetic fields. The magnetic specific heat can be described by the Schottky contribution from the crystal-electric-field (CEF) levels of Tb$^{3+}$, with introducing Gaussian distributions of the energy split of the ground-state doublet and the gap between the ground state and first excited level. These crystals has an extremely low phonon thermal conductivity in a broad temperature range that can be attributed to the scattering by the magnetic excitations, which are mainly associated with the CEF levels. There is strong magnetic field dependence of thermal conductivity, which is more likely related to the field-induced changes of phonon scattering by the CEF levels than magnetic transitions or spin excitations. For magnetic field along the [111] direction, there is large thermal Hall conductivity at low temperatures which displays a broad peak around 8 T. At high fields up to 14 T, the thermal Hall conductivity decreases to zero, which supports its origin from either the spinon transport or the phonon skew scattering by CEF levels. The thermal Hall effect is rather robust with Zr doping up to 0.2 but is strongly weakened in higher Zr-doped sample.
description: 9 pages, 8 figures, accepted for publication in Phys. Rev. B
Single-cell multi-omics profiling links dynamic DNA methylation to cell fate decisions during mouse early organogenesis.
Creators: name: Clark, Stephen J
name: Argelaguet, Ricard
name: Lohoff, Tim
name: Krueger, Felix
name: Drage, Deborah
name: Göttgens, Berthold
name: Marioni, John C
name: Nichols, Jennifer
name: Reik, Wolf
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Research

description: BACKGROUND: Perturbation of DNA methyltransferases (DNMTs) and of the active DNA demethylation pathway via ten-eleven translocation (TET) methylcytosine dioxygenases results in severe developmental defects and embryonic lethality. Dynamic control of DNA methylation is therefore vital for embryogenesis, yet the underlying mechanisms remain poorly understood. RESULTS: Here we report a single-cell transcriptomic atlas from Dnmt and Tet mutant mouse embryos during early organogenesis. We show that both the maintenance and de novo methyltransferase enzymes are dispensable for the formation of all major cell types at E8.5. However, DNA methyltransferases are required for silencing of prior or alternative cell fates such as pluripotency and extraembryonic programmes. Deletion of all three TET enzymes produces substantial lineage biases, in particular, a failure to generate primitive erythrocytes. Single-cell multi-omics profiling moreover reveals that this is linked to a failure to demethylate distal regulatory elements in Tet triple-knockout embryos. CONCLUSIONS: This study provides a detailed analysis of the effects of perturbing DNA methylation on mouse organogenesis at a whole organism scale and affords new insights into the regulatory mechanisms of cell fate decisions.
Asymptotic Behaviour of Pion--Pion Total Cross-Sections
Creators: name: Greynat, David
name: de Rafael, Eduardo
name: Vulvert, Grégory
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We derive a sum rule which shows that the Froissart-Martin bound for the asymptotic behaviour of the $ππ$ total cross sections at high energies, if modulated by the Lukaszuk-Martin coefficient of the leading $\log^2 s$ behaviour, cannot be an optimal bound in QCD. We next compute the total cross sections for $π^+ π^-$, $π^{\pm} π^0$ and $π^0 π^0$ scattering within the framework of the constituent chiral quark model (C$χ$QM) in the limit of a large number of colours $\Nc$ and discuss their asymptotic behaviours. The same $ππ$ cross sections are also discussed within the general framework of Large-\Nc~QCD and we show that it is possible to make an Ansatz for the isospin $I=1$ and $I=0$ spectrum which satisfy the Froissart-Martin bound with coefficients which, contrary to the Lukaszuk-Martin coefficient, are not singular in the chiral limit and have the correct Large-\Nc~counting. We finally propose a simple phenomenological model which matches the low energy behaviours of the $σ_{π^{\pm}π^0}^{\rm total}(s)$ cross section predicted by the C$χ$QM with the high energy behaviour predicted by the Large-$\Nc$ Ansatz. The magnitude of these cross sections at very high energies is of the order of those observed for the $pp$ and $p{\bar p}$ scattering total cross sections.
description: 21 pages, 5 figures. Typos corrected. Changes in some wording and references added. Version to appear in JHEP
Coplanar circumbinary planets can be unstable to large tilt oscillations in the presence of an inner polar planet
Creators: name: Childs, Anna C.
name: Martin, Rebecca G.
name: Lepp, Stephen
name: Lubow, Stephen H.
name: Geller, Aaron M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Mutually misaligned circumbinary planets may form in a warped or broken gas disc or from later planet-planet interactions. With numerical simulations and analytic estimates we explore the dynamics of two circumbinary planets with a large mutual inclination. A coplanar inner planet causes prograde apsidal precession of the binary and the stationary inclination for the outer planet is higher for larger outer planet orbital radius. In this case a coplanar outer planet always remains coplanar. On the other hand, a polar inner planet causes retrograde apsidal precession of the binary orbit and the stationary inclination is smaller for larger outer planet orbital radius. For a range of outer planet semi-major axes, an initially coplanar orbit is librating meaning that the outer planet undergoes large tilt oscillations. Circumbinary planets that are highly inclined to the binary are difficult to detect -- it is unlikely for a planet to have an inclination below the transit detection limit in the presence of a polar inner planet. These results suggest that there could be a population of circumbinary planets that are undergoing large tilt oscillations.
description: Accepted for publication in ApJL. 7 pages and 4 figures
The RCR Formula: How Reality Structures Itself
Creators: name: Gallant, Justin
Publisher: name: Zenodo
Year: 2025
Subjects: subject: metastability
subject: recursion
subject: autopoietic
subject: self-organization
subject: reality
subject: Philosophy
subject: FOS: Philosophy, ethics and religion
subject: Philosophy
subject: Contemporary philosophy
subject: chaos theory
subject: complex systems
subject: non-linear dynamics
subject: quantum mechanics

description: Abstract:The Recursive-Collapse-Recombination (RCR) Model is a metastable, autopoietic, non-hierarchical, non-binary, and non-linear framework that defines reality as a continuously generative process. It describes how recursion (self-reinforcing structures), collapse (destabilization and phase shifts), and recombination (adaptive restructuring) interact to produce emergent, dynamic systems. Unlike equilibrium-based models, RCR establishes metastability as the core condition of reality, as a result of the RCR interacting, ensuring ongoing transformation rather than static resolution. The model is mathematically formalized to apply across domains, from physics and cognitive science to social structures and AI systems. By framing reality as an interplay of recursion, collapse, and recombination, RCR reveals why deterministic reductionism fails and why reality remains an open-ended generative structure rather than a closed, finite system.Keywords:Recursive-Collapse-Recombination (RCR)MetastabilityPhase TransitionsNonlinear SystemsEmergenceSelf-OrganizationAutopoiesisIndeterminacyReality StructuringGenerative SystemsLicense (CC BY 4.0)This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).✔ Share — Copy and redistribute the material in any medium or format.✔ Adapt — Remix, transform, and build upon the material for any purpose, even commercially.Attribution Requirement:You must give appropriate credit, provide a link to the license, and indicate if changes were made. This must be done in a reasonable manner, but not in any way that suggests endorsement by the original author.No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.🔗 Full License Details: https://creativecommons.org/licenses/by/4.0/
Paths of Knowledge
Creators: name: Ferella, Chiara
name: Stockdale, Elizabeth
name: Hose, Martin
name: Ferella, Chiara
name: Shcherbakova, Elisaveta
name: Oki-Suga, Mai
name: Joosse, Albert
name: Cilliers Breytenbach
name: Hawes, Greta
name: Fascione, Sara
name: Safari Grey
name: Lovato, Valeria Flavia
Publisher: name: Edition Topoi
Year: 2018

description: Dieser Sammelband konzentriert sich auf konzeptuelle Erfahrungsbereiche, Reise und Wissen, und wie die beiden miteinander verquickt sind in antiken griechisch-römischen Repräsentationen und Texten. Er bietet eine Sammlung von Vorträgen, die während der internationalen Konferenz ‚Paths of Knowledge in Antiquity‘ im Dezember 2016 in Berlin gehalten wurden. Sie bieten Fallstudien aus der griechisch-römischen Welt, die die Verbun­denheit zwischen den beiden konzeptuellen Domänen aus zwei Perspektiven betrachten. Zum einen werden die tatsächliche Reise und konkrete Pfade fokussiert, die zum Wissenserwerb führen. Zum anderen wird das metaphorische Mapping verwendet, indem Elemente aus dem Wissensbereich bildlich mit dem der Reise verbunden werden. So nützlich diese beiden Bereiche als Startpunkte für die Textanalyse erscheinen, muss doch festgestellt werden, dass sie teils schwer voneinander zu trennen sind. So werden Reisen oft Metaphern für den Weg zum Wissenserwerb. Ebenso sind Reisemetaphern essentiell für wenig vertraute körperliche, abstrakte Prozesse und werden daher in theoretischen Konstruktionen wörtlich gebraucht. Schließlich teilen sich die beiden Richtungen und geben eine dritte Perspektive frei: den metaphorischen Weg zum Wissen als Bahn durch den Text, nämlich die Bahn, die Leser und Autor gemeinsam einschlagen. Die Beiträge zu diesem Sammelband zeigen deutlich, in welchem Ausmaß das Makrothema der Reise grundlegend ist für das Narrativ des Wissens­erwerbs.
With and without You
Creators: name: Stockdale, Elizabeth
Publisher: name: Edition Topoi
Year: 2018

description: Νόστος ist ein zentrales Element von Homers Odyssee. Das Epos enthält viele νόστοι und die wichtigste ist die νόστος des Odysseus. Dieser Beitrag diskutiert die νόστοι von Helena und Menelaos und wie sie getrennt von ihrer Reise berichten. Ziel ist die bei dieser Reise gewonnenen Erkenntnisse herauszuarbeiten. Im Gesamt­zusammenhang der Odyssee ist μῆτις ein wichtiger Aspekt von νόστος, und deshalb passen Helena, Menelaos und ihre Reise auch in dieses Schema. Ein weiteres Ziel ist, κλέος zu erörtern, das jedem der beiden durch das Berichten des eigenen νόστος zukommt. Ihr jeweiliges Erzählen zeigt, dass sie an denselben Orten waren, ähnliche Begegnungen hatten, beide Erkenntnisse gewonnen haben, sich beide verändert haben und nach Sparta zurückgekehrt sind. Dieser Beitrag weist nach, dass sich Helena und Menelaos auf dieselbe νόστος begeben haben: ein gemeinsamer Weg aber mit je andersartiger μῆτις.
Novel environmentally friendly catalytic oxidation approacheson elemental mercury removal from carbon steel surface
Creators: name: Azelee, Ihsan Wan
name: Aris, Azmi
name: Bakar, Wan Azelee Wan Abu
Publisher: name: Research and Development Office, Prince of Songkla University
Year: 2022
Subjects: mercury
carbon steel
catalyst
peroxyacetic acid
Fe leaching

description: Songklanakarin Journal of Science an Technology (SJST), 44, 3, 728-734
Diffusion-weighted imaging in oral squamous cell carcinoma using 3 Tesla MRI: is there a chance for preoperative discrimination between benign and malignant lymph nodes in daily clinical routine?
Creators: name: Wendl, Christina M.
name: Müller, Steffen
name: Eiglsperger, Johannes
name: Fellner, Claudia
name: Jung, Ernst Michael
name: Meier, Johannes K.
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: COMPUTED-TOMOGRAPHY; NECK DISSECTION; DIAGNOSTIC-ACCURACY; HEAD; VOLUME; CANCER; DIFFERENTIATION; COEFFICIENT; RATIONALE; Oral squamous cell carcinoma; lymph nodes; diffusion-weighted imaging (DWI); apparent diffusion coefficient; magnetic resonance imaging (MRI)
subject: 610 Medizin

description: Background Preoperative staging of cervical lymph nodes is important to determine the extent of neck dissection in patients with oral squamous cell carcinoma (OSCC). Purpose To evaluate whether a preoperative discrimination of benign and malignant cervical lymph nodes with diffusion-weighted imaging (DWI) (3T) is feasible for clinical application. Material and Methods Forty-five patients with histological proven OSCC underwent preoperative 3T-MRI. DWI (b=0, 500, and 1000s/mm(2)) was added to the standard magnetic resonance imaging (MRI) protocol. Mean apparent diffusion coefficients (ADC(mean)) were measured for lymph nodes with 3mm or more in short axis by two independent readers. Finally, these results were matched with histology. Results Mean ADC was significantly higher for malignant than for benign nodes (1.1430.188 * 10(-3) mm(2)/s vs. 0.987 +/- 0.215 * 10(-3) mm(2)/s). Using an ADC value of 0.994 * 10(-3) mm(2)/s as threshold results in a sensitivity of 80%, specificity of 65%, positive predictive value of 31%, and negative predictive value of 93%. Conclusion Due to a limited sensitivity and specificity DWI alone is not suitable to reliably discriminate benign from malignant cervical lymph nodes in daily clinical routine. Hence, the preoperative determination of the extent of neck dissection on the basis of ADC measurements is not meaningful.
description: Open Access-Komponente aus einer Allianzlizenz
The Journey as Device for Structuring Poetic Knowledge: A Poetic Method in Pindar's Epinicia
Creators: name: Hose, Martin
Publisher: name: Edition Topoi
Year: 2018

description: Der Beitrag analysiert den Gebrauch der Reise (einschließlich der verschiedenen Modi von Bewe­gung: Gehen, Segeln, Springen, Fliegen) als Metapher oder Bild für Poesie in Pindars Epinikien. Er schlägt vor, dass bestimmte Probleme der Komposition und Einheit Pindarischer Lieder leichter lösbar erscheinen, wenn man Pindars Metaphern des Liedes als Weg und des Dichters als Reisenden ernst nimmt. Eine Interpretation von Nem. 9 soll dies veranschaulichen; hier wird die Reise vom Ort des Sieges zur Heimat des Siegers zum Instrument, dem Gedicht Einheit zu verleihen. Das Bild vom Gedicht als Weg prägt zudem das Konzept, in dem sich die ‚Materialität‘ Pindarischer Poesie versteht, im Gegensatz zum Konzept des Buches, das die spätere griechische Literatur prägt.
Sensitivity of water balance in the Qaidam Basin to the mid-Pliocene climate
Creators: name: Wang, Xun
name: Schmidt, Benjamin
name: Otto, Marco
name: Ehlers, Todd A.
name: Mutz, Sebastian G.
name: Botsyun, Svetlana
name: Scherer, Dieter
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 550 Geowissenschaften
subject: Qaidam Basin
subject: Pliocene
subject: water balance
subject: dynamical downscaling

description: The Qaidam Basin (QB) in the northeastern Tibetan Plateau held a megalake system during the Pliocene. Today, the lower elevations in the basin are hyperarid. To understand to what extent the climate plays a role in the maintenance of the megalake system during the Pliocene, we applied the Weather Research and Forecasting model for dynamical downscaling of ECHAM5 global climate simulations for the present day and the mid-Pliocene. When imposing the mid-Pliocene climate on the QB with its modern land surface settings, the annual water balance (ΔS), that is, the change in terrestrial water storage within the QB, increases. This positive imbalance of ΔS induced solely by the changes in the large-scale climate state would lead to a readjustment of lake extent, until a new equilibrium state is reached, where loss due to evaporation over lake areas compensates for the input by runoff and precipitation. Atmospheric water transport (AWT) analysis at each border of the QB reveals that this imbalance of ΔS is caused by stronger moisture influx across the western border in winter, spring, and autumn and weaker moisture out-flux across the eastern border in summer. These changes in AWT are associated with the strengthening of the midlatitude westerlies in all seasons, except for summer, and the intensification of the East Asian Summer Monsoon. Given that the mid-Pliocene climate is an analog to the projected warm climate of the near future, our study contributes to a better understanding of climate change impacts in central Asia.
A weighty interpretation of the Galactic Centre excess
Creators: name: Boehm, Celine
name: Dolan, Matthew J.
name: McCabe, Christopher
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Previous attempts at explaining the gamma-ray excess near the Galactic Centre have focussed on dark matter annihilation directly into Standard Model particles. This results in a preferred dark matter mass of 30-40 GeV (if the annihilation is into b quarks) or 10 GeV (if it is into leptons). Here we show that the gamma-ray excess is also consistent with heavier dark matter particles; in models of secluded dark matter, dark matter with mass up to 76 GeV provides a good fit to the data. This occurs if the dark matter first annihilates to an on-shell particle that subsequently decays to Standard Model particles through a portal interaction. This is a generic process that works in models with annihilation, semi-annihilation or both. We explicitly demonstrate this in a model of hidden vector dark matter with an SU(2) gauge group in the hidden sector.
description: 5 pages, 4 figures. v2: Matches PRD version. Note: title of PRD version is "Interpretation of the Galactic Center excess of gamma rays with heavier dark matter particles"
Source of black bounces in general relativity
Creators: name: Rodrigues, Manuel E.
name: Silva, Marcos V. de S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Black bounces are spacetimes that can describe, depending on certain parameters, black holes or wormholes. In this work, we use a method to obtain the matter content that generates black bounce solutions in general relativity. The method is constructed in a general way, and as models, we apply it to the Simpson--Visser black bounce solution and the Bardeen-type black bounce solution. We obtain that these metrics are solutions of Einstein's equations when we consider the coupling of the gravitational interaction with a phantom scalar field with a nonlinear electrodynamics. The presence of the phantom scalar field is linked to the fact that this type of solution violates the null energy condition. We analyze separately the energy conditions associated with the stress-energy tensor for the scalar field and for the electromagnetic field.
description: 13 pages, 5 figures, Accepted for publication in Phys. Rev. D
A Bi-clustering Framework for Consensus Problems
Creators: name: Tepper, Mariano
name: Sapiro, Guillermo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We consider grouping as a general characterization for problems such as clustering, community detection in networks, and multiple parametric model estimation. We are interested in merging solutions from different grouping algorithms, distilling all their good qualities into a consensus solution. In this paper, we propose a bi-clustering framework and perspective for reaching consensus in such grouping problems. In particular, this is the first time that the task of finding/fitting multiple parametric models to a dataset is formally posed as a consensus problem. We highlight the equivalence of these tasks and establish the connection with the computational Gestalt program, that seeks to provide a psychologically-inspired detection theory for visual events. We also present a simple but powerful bi-clustering algorithm, specially tuned to the nature of the problem we address, though general enough to handle many different instances inscribed within our characterization. The presentation is accompanied with diverse and extensive experimental results in clustering, community detection, and multiple parametric model estimation in image processing applications.
The RCR Formula: How Reality Structures Itself
Creators: name: Gallant, Justin
Publisher: name: Zenodo
Year: 2025
Subjects: subject: metastability
subject: recursion
subject: autopoietic
subject: self-organization
subject: reality
subject: Philosophy
subject: FOS: Philosophy, ethics and religion
subject: Philosophy
subject: Contemporary philosophy
subject: chaos theory
subject: complex systems
subject: non-linear dynamics
subject: quantum mechanics

description: User's guide to Reality investigates unstable realities.
‘A Path for Understanding’: Journey Metaphors in (Three) Early Greek Philosophers
Creators: name: Ferella, Chiara
Publisher: name: Edition Topoi
Year: 2018

description: Dieser Aufsatz untersucht die Verwendung von Reise-Metaphern von drei frühgriechischen Denkern: Heraklit, Parmenides und Empedokles. Meine Untersuchung hebt die ausdruckstarke, leichtplastische und polyvalente Natur dieses Metaphern-Bereiches sowohl in Bezug auf diversen Autoren, als auch in ein und demselben Text hervor. Im Fokus steht der Zusammenhangzwischen Metapher, Imagi­nation und philosophischer Argumentation, besonders wenn ein neuer metaphorischer Stratus in einen schon etablierten Metapher-Bereich eingeführt wird. Schließlich wird auch untersucht, in wie fern ein neuer metaphorischer Stratus, indem dieser neue Kenntnisse und Einsichten strukturiert und organisiert, zum kreativen Denken und zur theoretischen Argumentation beiträgt.
The growth of brightest cluster galaxies in the TNG300 simulation:dissecting the contributions from mergers and in situ star formation
Creators: name: Montenegro-Taborda, Daniel
name: Rodriguez-Gomez, Vicente
name: Pillepich, Annalisa
name: Avila-Reese, Vladimir
name: Sales, Laura V.
name: Rodríguez-Puebla, Aldo
name: Hernquist, Lars
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the formation of brightest cluster galaxies (BCGs) in the TNG300 cosmological simulation of the IllustrisTNG project. Our cluster sample consists of 700 haloes with $M_{200} \geq 5 \times 10^{13} \, \mathrm{M}_{\odot}$ at $z=0$, along with their progenitors at earlier epochs. This includes 280 systems with $M_{200} \geq 10^{14} \, \mathrm{M}_{\odot}$ at $z=0$, as well as three haloes with $M_{200} \geq 10^{15} \, \mathrm{M}_{\odot}$. We find that the stellar masses and star formation rates of our simulated BCGs are in good agreement with observations at $z \lesssim 0.4$, and that they have experienced, on average, $\sim$2 ($\sim$3) major mergers since $z=1$ ($z=2$). Separating the BCG from the intracluster light (ICL) by means of a fixed 30 kpc aperture, we find that the fraction of stellar mass contributed by ex situ (i.e. accreted) stars at $z=0$ is approximately 70, 80, and 90 per cent for the BCG, BCG+ICL, and ICL, respectively. Tracking our simulated BCGs back in time using the merger trees, we find that they became dominated by ex situ stars at $z \sim $1-2, and that half of the stars that are part of the BCG at $z=0$ formed early ($z \sim 3$) in other galaxies, but `assembled' onto the BCG until later times ($z \approx 0.8$ for the whole sample, $z \approx 0.5$ for BCGs in $M_{200} \geq 5 \times 10^{14} \, \mathrm{M}_{\odot}$ haloes). Finally, we show that the stellar mass profiles of BCGs are often dominated by ex situ stars at all radii, with stars from major mergers being found closer to the centre, while stars that were tidally stripped from other galaxies dominate the outer regions.
description: 19 pages, 11 figures. Accepted for publication in MNRAS
The Paths of the Soul in the Pseudo-Hippocratic De victu
Creators: name: Shcherbakova, Elisaveta
Publisher: name: Edition Topoi
Year: 2018

description: In meinem Aufsatz schlage ich eine neue Interpretation einer notorisch schwierigen Stelle aus der Pseudo-Hippokratischen Schrift De victu vor, in der es sich um verschiedene Aktivitäten und Bewe­gun­gen der Seele während des Schlafens handelt. Die betreffende Passage wurde von vielen Forschern als eine Art orphisch-pythagoreische Seelenreise gedeutet und galt lange als Schlüssel­beweis für einen Körper-Seele-Dualismus in De victu. Wie ich jedoch zu zeigen versuche, unternimmt die Seele tatsächlich eine Reise, aber keine pythagoreische: Laut meiner Hypothese bewegt sich die psyche von der Peripherie tiefer in den Körperhinein, zu einem Ort, den der Hippokratische Autor als ‚oikos der Seele‘ bezeichnet. Ichbehaupte, dass dieser oikos am besten als eine Art ‚kognitives Zentrum‘ zu verstehen ist, dass ich in der Brust- und / oder Herzregion befindet. Weiter argumen­tiere ich, dass De victu’s Seelenlehre der materialistischen Psychophysiologie solcher Vorsokratiker des 5. Jahrhunderts, wie Diogenes von Apollonia, näher steht.
The pride of lions around Messier 105
Creators: name: Karachentsev, I. D.
name: Kaisina, E. I.
name: Karachentseva, V. E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We undertook a search for new dwarf galaxies in the Leo-I group using the data from the DECaLS digital sky survey. Five new presumed members of this group have been found in a wide vicinity of ${\rm M}\,105 ({\rm NGC}\,3379$). Currently, the group has a population of $83$ galaxies, $33$ of which have measured radial velocities. More than half of the group members belong to early types with no signs of ongoing star formation. About a quarter of the galaxies are outside the group's virial radius, $R_v = 385$~kpc. The presence of multiple systems with a size of about 15~kpc is evident in the group, but there are no noticeable global flat or filamentary substructures. The luminosity function of the group looks to be deficient in galaxies with absolute magnitudes in the interval $M_B = [-18, -15]$ mag. The ${\rm M}\,105$ group is characterized by a radial velocity dispersion of $136$~km~s$^{-1}$, orbital mass estimate $(5.76\pm1.32)\times 10^{12}~M_{\odot}$, and the total mass-to-K-band-luminosity ratio $(17.8\pm4.1) M_\odot/L_\odot$. The neighboring group of galaxies around ${\rm M}\,66 ({\rm NGC}\,3627$) has a similar virial radius, $390$~kpc, velocity dispersion, $135$~km~s$^{-1}$, and total mass-to-luminosity ratio, $(15.6\pm3.9) M_\odot/L_\odot$. Both groups in the Leo constellation are approaching the Local Group with a velocity of about 100~km~s$^{-1}$. In the background of the ${\rm M}\,105$ group, we noted a group of 6 galaxies with an unusually low virial mass-to-luminosity ratio, $M_T/L_K = (4.1\pm2.2) M_\odot/L_\odot$.
description: 12 pages, 5 figures, 4 tables, accepted for MNRAS