cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Consistency analysis of a Dark Matter velocity dependent force as an alternative to the Cosmological Constant
Creators: name: Loeve, Karoline
name: Nielsen, Kristine Simone
name: Hansen, Steen H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A range of cosmological observations demonstrate an accelerated expansion of the Universe, and the most likely explanation of this phenomenon is a cosmological constant. Given the importance of understanding the underlying physics, it is relevant to investigate alternative models. This article uses numerical simulations to test the consistency of one such alternative model. Specifically, this model has no cosmological constant, instead the dark matter particles have an extra force proportional to velocity squared, somewhat reminiscent of the magnetic force in electrodynamics. The constant strength of the force is the only free parameter. Since bottom-up structure formation creates cosmological structures whose internal velocity dispersions increase in time, this model may mimic the temporal evolution of the effect from a cosmological constant. It is shown that models with force linearly proportional to internal velocites, or models proportional to velocity to power three or more cannot mimic the accelerated expansion induced by a cosmological constant. However, models proportional to velocity squared are still consistent with the temporal evolution of a Universe with a cosmological model.
description: 5 pages, 3 figures, ApJ format
Asymptotic Iteration Method Solutions to the Relativistic Duffin-Kemmer-Petiau Equation
Creators: name: Boztosun, I.
name: Karakoc, M.
name: Yasuk, F.
name: Durmus, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 03.65.Pm

description: A simple exact analytical solution of the relativistic Duffin-Kemmer-Petiau equation within the framework of the asymptotic iteration method is presented. Exact bound state energy eigenvalues and corresponding eigenfunctions are determined for the relativistic harmonic oscillator as well as the Coulomb potentials. As a non-trivial example, the anharmonic oscillator is solved and the energy eigenvalues are obtained within the perturbation theory using the asymptotic iteration method.
description: 17 pages written with LaTeX Revtex4. accepted for publication in Journal of Mathematical Physics
Λόγοι έφεσης κατά τον ΚΠολδ
Creators: name: Κάκουρα, Αντωνία Σπυρίδωνος
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Έφεση
Λόγοι
ένδικο μέσο
Appeal
Grounds
legal remedy

description: Αντικείμενο της παρούσας εργασίας είναι η αποσαφήνιση του περιεχομένου των λόγων έφεσης. Το άρθρο 520 παρ.1 ΚΠολΔ ορίζει ότι το έγγραφο της έφεσης πρέπει να περιέχει τους λόγους της, χωρίς όμως να προσδιορίζει ποιο πρέπει να είναι και το περιεχόμενό τους. Σκοπός, λοιπόν, της εργασίας ήταν εκκινώντας από το αντικείμενο της έφεσης που υιοθετεί το ελληνικό δικονομικό σύστημα και μέσα από την επισκόπηση της νομολογίας να αποσαφηνίσουμε και να κατηγοριοποιήσουμε τους λόγους έφεσης. Μάλιστα, ιδιαίτερη έμφαση δίνεται στους νέους πραγματικούς ισχυρισμούς ως λόγους έφεσης. Περαιτέρω, αναλύεται διεξοδικά και το ζήτημα της επίδρασης των λόγων στο μεταβιβαστικό αποτέλεσμα του ενδίκου μέσου τόσο από δογματική σκοπιά όσο και με βάση τα νομολογιακά πορίσματα
description: The subject matter of this paper is the clarification of the grounds for appeal. Article 520 par. 1 of Civil Procedural Code states that the document of the appeal should include its legal grounds, without, however, defining which their content should be. So, the aim of the paper was, by starting from the subject matter of the appeal provided by the Greek Procedural System and scrutinizing the case law, to clarify and categorize the grounds of appeal. Particular emphasis is given to the new actual allegations as grounds for appeal. Furthermore, the impact of the grounds of appeal on the legal claim transferred to the Court of Appeal for review is detailed examined from the point of view both of the doctrinal aspect and the case law findings
Transcription of a story about Verdena's grandmother working at a hotel
Creators: name: Parker, Verdena
name: Newbold, Lindsey
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio file VP-070412-12: Transcription of a story about Verdena's grandmother working at a hotel in Willow Creek (file VP-180811-03), from 3:49 to the end of the story.
A Note on the Generalized Friedmann Equations for a Thick Brane
Creators: name: Khakshournia, Samad
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Within our thick brane approach previously used to obtain the cosmological evolution equations on a thick brane embedded in a five-dimensional Schwarzschild Anti-de Sitter spacetime it is explicitly shown that the consistency of these equations with the energy conservation equation requires that, in general, the thickness of the brane evolves in time. This varying brane thickness entails the possibility that both Newton's gravitational constant $G$ and the effective cosmological constant $Λ_4$ are time dependent.
description: 6 pages,To appear in GRG
Cosmology of complex scalar dark matter: interplay of self-scattering and annihilation
Creators: name: Ghosh, Avirup
name: Ghosh, Deep
name: Mukhopadhyay, Satyanarayan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The cosmology of a standard model (SM) gauge singlet complex scalar dark matter (DM), stabilized by a reflection symmetry, is studied including all renormalizable interactions that preserve the reflection symmetry but can break the larger global U(1) symmetry of DM number. We find an interesting interplay of the ensuing DM self-scatterings and annihilations in generating the present DM density, and possible particle-antiparticle asymmetry in the DM sector. The role of DM self-scatterings in determining its present density and composition is a novel phenomenon. The simultaneous presence of the self-scatterings and annihilations is required to obtain a non-zero asymmetry, which otherwise vanishes due to unitarity sum rules.
description: 21 pages, 8 figures; v2: 27 pages, 10 figures, new computations, figures and discussion added, version to appear in Physical Review D
First stars as a possible origin for the helium-rich population in omega Centauri
Creators: name: Choi, Ena
name: Yi, Sukyoung K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The most massive Galactic globular cluster omega Cen appears to have two, or perhaps more, distinct main sequences. Its bluest main sequence is at the centre of debate because it has been suggested to have an extremely high helium abundance of Y ~ 0.4. The same helium abundance is claimed to explain the presence of extreme horizontal branch stars of omega Cen as well. This demands a relative helium to metal enrichment of deltaY/deltaZ ~ 70; that is, more than one order of magnitude larger than the generally accepted value. Candidate solutions, namely, AGB stars, massive stars, and supernovae, have been suggested; but in this study, we show that none of them is a viable channel, in terms of reproducing the high value of deltaY/deltaZ for the constrained age difference between the red and blue populations. Essentially no populations with an ordinary initial mass function, including those candidates, can produce such a high deltaY/deltaZ because they all produce metals as well as helium. As an alternative, we investigate the possibility of the stochastic ``first star'' contamination to the gas from which the younger generation of omega Cen formed. This requires the assumption that Population III star formation episode overlaps with that of Population II. While the required condition appears extreme, very massive objects in the first star generation provide a solution that is at least as plausible as any other suggestions made before.
description: 6 pages, 5 figures, accepted for publication of MNRAS
Revealing a Centrally Condensed Structure in OMC-3/MMS 3 with ALMA High Resolution Observations
Creators: name: Morii, Kaho
name: Takahashi, Satoko
name: Machida, Masahiro N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using the Atacama Large Millimeter/submillimeter Array (ALMA), we investigated a peculiar millimeter source MMS 3 located in the Orion Molecular Cloud 3 (OMC-3) region in the 1.3 mm continuum, CO ($J$=2-1), SiO ($J$=5-4), C$^{18}$O ($J$=2-1), N$_2$D$^+$ ($J$=3-2), and DCN ($J$=3-2) emissions. With the ALMA high angular resolution ($\sim$0''.2), we detected a very compact and highly centrally condensed continuum emission with a size of 0''.45 $\times$ 0''.32 (P.A.=0.22$^\circ$). The peak position coincides with the locations of previously reported $Spitzer$/IRAC and X-ray sources within their positional uncertainties. We also detected an envelope with a diameter of $\sim$6800 au (P.A.=75$^\circ$) in the C$^{18}$O ($J$=2-1) emission. Moreover, a bipolar outflow was detected in the CO ($J$=2-1) emission for the first time. The outflow elongates roughly perpendicular to the long axis of the envelope detected in the C$^{18}$O ($J$=2-1) emission. Compact high-velocity CO gas in the (red-shifted) velocity range of 22-30 km s$^{-1}$, presumably tracing a jet, was detected near the 1.3 mm continuum peak. A compact and faint red-shifted SiO emission was marginally detected on the CO outflow lobe. The physical quantities of the outflow in MMS 3 are relatively smaller than those in other sources in the OMC-3 region. The centrally condensed object associated with the near-infrared and X-ray sources, the flattened envelope, and the faint outflow indicate that MMS 3 harbors a low mass protostar with an age of $\sim$10$^3$ yr.
description: 15 pages, 6 figures, 4 tables, accepted for publication in ApJ
Cirrhitidae
Creators: name: Brown, Judith
name: Beard, Annalea
name: Clingham, Elizabeth
name: Fricke, Ronald
name: Henry, Leeann
name: Wirtz, Peter
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Perciformes
Cirrhitidae

description: Cirrhitidae   Amblycirrhitus pinos (Mowbray, 1927) —Redspotted hawkfish (FAO)
 References: Melliss (1875) as Cirrhitichthys fasciatus, Randall (1968), Edwards & Glass (1987a), Edwards (1990:111), Randall in Quéro et al. (1990).
 Material: BMNH 1986.4.3.5 (1 spec.) and 5 additional BMNH lots, USNM 267876 (1 spec.), USNM 267886 (1 spec.), USNM 429514 (1 spec.).
description: Published as part of Brown, Judith, Beard, Annalea, Clingham, Elizabeth, Fricke, Ronald, Henry, Leeann & Wirtz, Peter, 2019, The fishes of St Helena Island, central Atlantic Ocean-new records and an annotated check-list, pp. 151-194 in Zootaxa 4543 (2) on page 179, DOI: 10.11646/zootaxa.4543.2.1, http://zenodo.org/record/2617755
On the Origin of Mass--Metallicity Relations, Blue Tilts, and Scaling Relations for Metal-poor Globular Cluster Systems
Creators: name: Bekki, K.
name: Yahagi, H.
name: Forbes, D. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate formation processes and physical properties of globular cluster systems (GCSs) in galaxies based on high-resolution cosmological simulations with globular clusters. We focus on metal-poor clusters (MPCs) and correlations with their host galaxies by assuming that MPC formation is truncated at a high redshift (z_trun > 6). We find that the correlation between mean metallicities (Z_gc) of MPCs and their host galaxy luminosities (L) flattens from z=z_trun to z=0. We also find that the observed relation (Z_gc ~ L^0.15) in MPCs can be reproduced well in the models with Z_gc ~ L^0.5 at z=z_trun when z_trun ~ 10, if mass-to-light-ratios are assumed to be constant at z=z_trun. However, better agreement with the observed relation is found for models with different mass-to-light-ratios between z=z_trun and z=0. It is also found that the observed color-magnitude relation of luminous MPCs (i.e., ``blue tilts'') may only have a small contribution from the stripped stellar nuclei of dwarf galaxies, which have nuclei masses that correlate with their total mass at z=z_trun. The simulated blue tilts are found to be seen more clearly in more massive galaxies, which reflects the fact that more massive galaxies at z=0 are formed from a larger number of dwarfs with stellar nuclei formed at z>z_trun. The half-number radii (R_e) of GCSs, velocity dispersions of GCSs (sigma), and their host galaxy masses (M_h) are found to be correlated with one another such that R_e ~ M_h^{0.57} and sigma ~ M_h^{0.32}.
description: 15 pages, 20 figures, accepted by MNRAS
Πρόβλεψη λιανικών πωλήσεων με χρήση αναδρομικών νευρωνικών δικτύων και επιλογή χαρακτηριστικών
Creators: name: Βουλγαράκη, Ελένη Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Μηχανική μάθηση
Νευρωνικά δίκτυα
Πρόβλεψη ζήτησης
Machine learning
Neural networks
Demand forecasting

description: Το LSTM αποτελούν μια κατηγορία ανατροφοδοτούμενων νευρωνικών δικτύων (RNN), τα οποία έχουν εξαιρετική ικανότητα να μοντελοποιούν χρονικές ακολουθίες, ειδικά στις περιπτώσεις που οι χρονικές εξαρτήσεις είναι μεγάλου εύρους. Στην παρούσα διπλωματική εργασία, θα χρησιμοποιήσουμε LSTM RNNs για πρόβλεψη ζήτησης προϊόντων λιανικής πώλησης. Αρχικά γίνεται μια εισαγωγή στο πρόβλημα που καλούμαστε να αντιμετωπίσουμε και στη σημασία της σωστής πρόβλεψης της συγκεκριμένης πληροφορίας. Ακολουθεί μια περιγραφή των πιο διαδεδομένων μεθόδων της μηχανικής μάθησης που χρησιμοποιούνται σε τέτοιου είδους προβλήματα. Στη συνέχεια παρουσιάζονται τα δεδομένα που χρησιμοποιήθηκαν καθώς και η προεπεξεργασία και μοντελοποίηση αυτών, που ήταν απαραίτητα προκειμένου να χρησιμοποιηθούν στην ανάλυση. Τέλος, αναλύεται η αρχιτεκτονική του LSTM RNN και η βελτιστοποίηση των υπερπαραμέτρων, παρουσιάζονται τα αποτελέσματα και κάποιες σκέψεις για μελλοντικές προεκτάσεις. 2
description: Long Short-Term Memory (LSTM) is special type of recurrent neural networks (RNN) which is designed to approach and model time series data, and their broader dependencies. In this thesis, we will use LSTM for retail demand forecasting. First, we will give a short introduction into the problem we are facing, and we will try to explain the importance of accurate prediction. Next we give a brief overview of the most common machine learning methods that are used in similar problems. What follows next is the description of the used the data, as well as the pre-processing and modeling procedure, which were necessary to be used in the analysis. Finally, the modeling of the LSTM RNN is analyzed and optimized and we present the results and some thoughts for future extensions.
The unit of electric charge and the mass hierarchy of heavy particles
Creators: name: Castro, G. Lopez
name: Pestieau, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose some empirical formulae relating the masses of the heaviest particles in the standard model (the W,Z,H bosons and the t quark) to the charge of the positron $e$ and the Higgs condensate v. The relations for the masses of gauge bosons m_W = (1+e)v/4 and m_Z=sqrt{(1+e^2)/2}*(v/2) are in excellent agreement with experimental values. By requiring the electroweak standard model to be free from quadratic divergencies at the one-loop level, we find: m_t=v/sqrt{2} and m_H=v/sqrt{2e}, or the very simple ratio (m_t/m_H)^2=e.
description: 6 pages
PSIXOLINGIVISTIKAGA OID TADQIQOTLARINING AHAMIYATI
Creators: name: Yuldosheva, Begoyim
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada psixolingvistika, ya'ni lingvopsixologiya yo'nalishining yuzaga kelish shartlari, o'ziga xosligi va bugungi kundagi zarurati xususida so'z boradi. Uning matnni idrok etish va tushunish jarayonida tutgan o'rni hali ham yetarlicha o'rganilmagan, bu esa, o'z navbatida, matn tahlili va semantik idrok etish qoidalarini aniqlash masalasida jiddiy e 'tibor qaratishni talab qiladi
An Intrisic Topology for Orthomodular Lattices
Creators: name: Brunet, Olivier
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: General Topology (math.GN)
subject: Logic (math.LO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We present a general way to define a topology on orthomodular lattices. We show that in the case of a Hilbert lattice, this topology is equivalent to that induced by the metrics of the corresponding Hilbert space. Moreover, we show that in the case of a boolean algebra, the obtained topology is the discrete one. Thus, our construction provides a general tool for studying orthomodular lattices but also a way to distinguish classical and quantum logics.
description: Under submission to the International Journal of Theoretical Physics
First-order perturbations of Gödel-type metrics in non-dynamical Chern-Simons modified gravity
Creators: name: Altschul, B.
name: Nascimento, J. R.
name: Petrov, A. Yu.
name: Porfírio, P. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Gödel-type metrics that are homogeneous in both space and time remain, like the Schwarzschild metric, consistent within Chern-Simons modified gravity; this is true in both the non-dynamical and dynamical frameworks, each of which involves an additional pseudoscalar field coupled to the Pontryagin density. In this paper, we consider stationary first-order perturbations to these metrics in the non-dynamical framework. Under certain assumptions we find analytical solutions to the perturbed field equations. The solutions of the first-order field equations break the translational and cylindrical symmetries of the unperturbed metrics. The effective potential controlling planar geodesic orbits is also affected by the perturbation parameter, which changes the equilibrium radii for the orbits of both massive particles and massless photons.
description: 20 pages, 6 figures. Version accepted for publication in Classical and Quantum Gravity
Theory and experiment for resource-efficient joint weak-measurement
Creators: name: Martinez-Becerril, Aldo C.
name: Bussières, Gabriel
name: Curic, Davor
name: Giner, Lambert
name: Abrahao, Raphael A.
name: Lundeen, Jeff S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Incompatible observables underlie pillars of quantum physics such as contextuality and entanglement. The Heisenberg uncertainty principle is a fundamental limitation on the measurement of the product of incompatible observables, a `joint' measurement. However, recently a method using weak measurement has experimentally demonstrated joint measurement. This method [Lundeen, J. S., and Bamber, C. Phys. Rev. Lett. 108, 070402, 2012] delivers the standard expectation value of the product of observables, even if they are incompatible. A drawback of this method is that it requires coupling each observable to a distinct degree of freedom (DOF), i.e., a disjoint Hilbert space. Typically, this `read-out' system is an unused internal DOF of the measured particle. Unfortunately, one quickly runs out of internal DOFs, which limits the number of observables and types of measurements one can make. To address this limitation, we propose and experimentally demonstrate a technique to perform a joint weak-measurement of two incompatible observables using only one DOF as a read-out system. We apply our scheme to directly measure the density matrix of photon polarization states.
description: 17 pages, 5 figures
Decay of correlations for slowly mixing flows
Creators: name: Melbourne, Ian
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We show that polynomial decay of correlations is prevalent for a class of nonuniformly hyperbolic flows. These flows are the continuous time analogue of a class of nonuniformly hyperbolic diffeomorphisms for which Young proved polynomial decay of correlations. Roughly speaking, in situations where the decay rate $O(1/n^β)$ has previously been proved for diffeomorphisms, we establish the decay rate $O(1/t^β)$ for typical flows. Applications include certain classes of semidispersing billiards, as well as dispersing billiards with vanishing curvature. In addition, we obtain results for suspension flows with unbounded roof functions. This includes the planar periodic Lorentz flow with infinite horizon.
Robust Forecasting using Predictive Generalized Synchronization in Reservoir Computing
Creators: name: Platt, Jason A.
name: Wong, Adrian S.
name: Clark, Randall
name: Penny, Stephen G.
name: Abarbanel, Henry D. I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Reservoir computers (RC) are a form of recurrent neural network (RNN) used for forecasting timeseries data. As with all RNNs, selecting the hyperparameters presents a challenge when training onnew inputs. We present a method based on generalized synchronization (GS) that gives direction in designing and evaluating the architecture and hyperparameters of an RC. The 'auxiliary method' for detecting GS provides a computationally efficient pre-training test that guides hyperparameterselection. Furthermore, we provide a metric for RC using the reproduction of the input system's Lyapunov exponentsthat demonstrates robustness in prediction.
description: Full Version of arXiv:2102.08930
Magnetar oscillations pose challenges for strange stars
Creators: name: Watts, Anna L.
name: Reddy, Sanjay
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Compact relativistic stars allow us to study the nature of matter under extreme conditions, probing regions of parameter space that are otherwise inaccessible. Nuclear theory in this regime is not well constrained: one key issue is whether neutron stars are in fact composed primarily of strange quark matter. Distinguishing the two possibilities, however, has been difficult. The recent detection of seismic vibrations in the aftermath of giant flares from two magnetars (highly magnetized compact stars) is a major breakthrough. The oscillations excited seem likely to involve the stellar crust, the properties of which differ dramatically for strange stars. We show that the resulting mode frequencies cannot be reconciled with the observations for reasonable magnetar parameters. Ruling out strange star models would place a strong constraint on models of dense quark matter.
description: Parameter space expanded, 5 pages, 3 figures, MNRAS Letters in press
Tensor hierarchy algebra extensions of over-extended Kac--Moody algebras
Creators: name: Cederwall, Martin
name: Palmkvist, Jakob
Publisher: name: arXiv
Year: 2021
Subjects: subject: Representation Theory (math.RT)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Tensor hierarchy algebras are infinite-dimensional generalisations of Cartan-type Lie superalgebras. They are not contragredient, exhibiting an asymmetry between positive and negative levels. These superalgebras have been a focus of attention due to the fundamental role they play for extended geometry. In the present paper, we examine tensor hierarchy algebras which are super-extensions of over-extended (often, hyperbolic) Kac--Moody algebras. They contain novel algebraic structures. Of particular interest is the extension of a over-extended algebra by its fundamental module, an extension that contains and generalises the extension of an affine Kac--Moody algebra by a Virasoro derivation $L_1$. A conjecture about the complete superalgebra is formulated, relating it to the corresponding Borcherds superalgebra.
description: 66 pages. v2: several minor changes. Title changed. Version accepted for publication in Communications in Mathematical Physics
Interplay between powder catchment efficiency and layer height in self-stabilized laser metal deposition
Creators: name: Donadello, Simone
name: Furlan, Valentina
name: Demir, Ali Gökhan
name: Previtali, Barbara
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: In laser metal deposition (LMD) the height of the deposited track can vary within and between layers, causing significant deviations during the process evolution. Previous works have shown that in certain conditions a self-stabilizing mechanism occurs, maintaining a regular height growth and a constant standoff distance between the part and the deposition nozzle. Here we analyze the link between the powder catchment efficiency and the deposition height stability. To this purpose, a monitoring system was developed to study the deposition in different process conditions, using inline measurements of the specimen weight in combination with the layer height information obtained with coaxial optical triangulation. An analytical model was used to estimate the deposition efficiency in real-time from the height monitoring and the process parameters, which was verified by the direct mass measurements. The results show that the track height stabilization is associated to a reduction of the powder catchment efficiency, which is governed by the melt pool relative position with respect to the powder cone and the laser beam. For a given set of parameters, the standoff distance can be estimated to achieve the highest powder catchment efficiency and a regular height through the build direction.
Scalable and Efficient Neural Speech Coding: A Hybrid Design
Creators: name: Zhen, Kai
name: Sung, Jongmo
name: Lee, Mi Suk
name: Beak, Seungkwon
name: Kim, Minje
Publisher: name: arXiv
Year: 2021
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: We present a scalable and efficient neural waveform coding system for speech compression. We formulate the speech coding problem as an autoencoding task, where a convolutional neural network (CNN) performs encoding and decoding as a neural waveform codec (NWC) during its feedforward routine. The proposed NWC also defines quantization and entropy coding as a trainable module, so the coding artifacts and bitrate control are handled during the optimization process. We achieve efficiency by introducing compact model components to NWC, such as gated residual networks and depthwise separable convolution. Furthermore, the proposed models are with a scalable architecture, cross-module residual learning (CMRL), to cover a wide range of bitrates. To this end, we employ the residual coding concept to concatenate multiple NWC autoencoding modules, where each NWC module performs residual coding to restore any reconstruction loss that its preceding modules have created. CMRL can scale down to cover lower bitrates as well, for which it employs linear predictive coding (LPC) module as its first autoencoder. The hybrid design integrates LPC and NWC by redefining LPC's quantization as a differentiable process, making the system training an end-to-end manner. The decoder of proposed system is with either one NWC (0.12 million parameters) in low to medium bitrate ranges (12 to 20 kbps) or two NWCs in the high bitrate (32 kbps). Although the decoding complexity is not yet as low as that of conventional speech codecs, it is significantly reduced from that of other neural speech coders, such as a WaveNet-based vocoder. For wide-band speech coding quality, our system yields comparable or superior performance to AMR-WB and Opus on TIMIT test utterances at low and medium bitrates. The proposed system can scale up to higher bitrates to achieve near transparent performance.
description: IEEE/ACM Transactions on Audio, Speech, and Language Processing (IEEE/ACM TASLP), 2021 (Accepted for publication)
Noncommutative Gravity
Creators: name: Harikumar, E.
name: Rivelles, Victor O.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider simple extensions of noncommutativity from flat to curved spacetime. One possibility is to have a generalization of the Moyal product with a covariantly constant noncommutative tensor $θ^{μν}$. In this case the spacetime symmetry is restricted to volume preserving diffeomorphisms which also preserve $θ^{μν}$. Another possibility is an extension of the Kontsevich product to curved spacetime. In both cases the noncommutative product is nonassociative. We find the the order $θ^2$ noncommutative correction to the Newtonian potential in the case of a covariantly constant $θ^{μν}$. It is still of the form $1/r$ plus an angle dependent piece. The coupling to matter gives rise to a propagator which is $θ$ dependent.
description: 11 pages, more references added
Fragility of String Orders
Creators: name: Anfuso, F.
name: Rosch, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: One-dimensional gapped systems are often characterized by a 'hidden' non-local order parameter, the so-called string order. Due to the gap, thermodynamic properties are robust against a weak higher-dimensional coupling between such chains or ladders. To the contrary, we find that the string order is not stable and decays for arbitrary weak inter-chain or inter-ladder coupling. We investigate the vanishing of the order for three different systems: spin-one Haldane chains, band insulators, and the transverse-field Ising model. Using perturbation theory and bosonization, we show that the fragility of the string order arises from non-local commutation relations between the non-local order parameter and the perturbation.
description: 7 pages, 3 figures. Published version
Η Β΄ φάση του Προνομιακού Ζητήματος (1890-1891) και η αποτύπωσή του στον τύπο της Θεσσαλονίκης
Creators: name: Παναγιωτοπούλου, Αναστασία Αντωνίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Προνόμια
Οικουμενικό Πατριαρχείο
Τύπος της Θεσσαλονίκης
Privileges
Ecumenical Patriarchate
Thessaloniki press

description: Σκοπός της παρούσας εργασίας είναι να παρουσιάσει τον τρόπο αποτύπωσης και περιγραφής στον τύπο της Θεσσαλονίκης, των γεγονότων που διαδραματίστηκαν κατά τη διάρκεια της Β΄ φάσης του προνομιακού ζητήματος, το οποίο προέκυψε κατά τα έτη 1890-1891. Γίνεται προσπάθεια εξιστόρησης των γεγονότων με βάση τα δημοσιεύματα του τύπου και τα έγγραφα της επίσημης αλληλογραφίας του Οικουμενικού Πατριαρχείου με την Υψηλή Πύλη. Προβάλλεται η ιστορία του τύπου της Θεσσαλονίκης κατά την οθωμανική περίοδο, και ειδικότερα η ιστορίας της εφημερίδας «Φάρος της Μακεδονίας» η οποία αποτέλεσε την κύρια πηγή της εργασίας. Αποτυπώνεται το ιστορικό πλαίσιο παραχώρησης των προνομίων στους ορθόδοξους λαούς από τους μουσουλμάνους ηγέτες, τόσο πριν την Άλωση της Κωνσταντινούπολης όσο και μετά. Επίσης εξετάζεται το ιστορικό πλαίσιο γένεσης του προνομιακού ζητήματος κατά τον 19ο αιώνα, τον αιώνα των μεγάλων Μεταρρυθμίσεων της Οθωμανικής Αυτοκρατορίας και της κατά συνέπεια διαμόρφωσης νέου νομικού πλαισίου λειτουργίας για την ορθόδοξη κοινότητα. Θεωρήθηκε επίσης αναγκαία η παράθεση των γεγονότων της Α΄ φάσης, προκειμένου ο αναγνώστης να έχει μια καθολική και σαφή εικόνα του προνομιακού ζητήματος και του τρόπου με τον οποίο εξελίχθηκε. Στο ίδιο πλαίσιο γίνεται και σύντομη αναφορά και στη Γ’ φάση του προνομιακού ζητήματος.
description: The aim of the present thesis is to present the way of Thessaloniki press described the events that took place during the second phase of the privilege issue which emerged the years 1890-1891. Attempts are being made to recount the events based on press reports and documents from the official correspondence of the Ecumenical Patriarchate and the Ottoman government.The history of the press during the Ottoman period is presented, especially the history of the newspaper “Faros of Macedonia”, which was the main source of this thesis. The historical context of the concession of privileges to the Orthodox peoples by Muslim leaders is first examined both before and after the Fall of Constantinople. Then the historical context of the birth of the privilege issue in the 19th century, the century of the great Transforms of the Ottoman Empire and the consequent formation of a new legal framework for the Orthodox community are examined. It is also considered necessary to present the events of the first phase, in order for the reader to have a universal and clear picture of the privilege issue and the way in which it involved. In the same context, a brief reference is made to the third phase of the privilege issue.
Screening of radiation gastrointestinal injury biomarkers in rat plasma by high-coverage targeted lipidomics
Creators: name: Xi, Cong
name: Zhao, Hua
name: Liu, Hai-Xiang
name: Xiang, Jia-Qi
name: Lu, Xue
name: Cai, Tian-Jing
name: Li, Shuang
name: Gao, Ling
name: Tian, Xue-Lei
name: Liu, Ke-Hui
name: Tian, Mei
name: Liu, Qing-Jie
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Physiology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: In the event of radiological accidents and cancer radiotherapies in the clinic, the gastrointestinal (GI) system is vulnerable to ionizing radiation and shows GI injury. Accessible biomarkers may provide means to predict, evaluate, and treat GI tissue damage. The current study investigated radiation GI injury biomarkers in rat plasma. High-coverage targeted lipidomics was employed to profile lipidome perturbations at 72 h after 0, 1, 2, 3, 5, and 8 Gy (60Co γ-rays at 1 Gy/min) total-body irradiation in male rat jejunum. The results were correlated with previous plasma screening outcomes. In total, 93 differential metabolites and 28 linear dose-responsive metabolites were screened in the jejunum. Moreover, 52 lipid species with significant differences both in jejunum and plasma were obtained. Three lipid species with linear dose-response relationship both in jejunum and plasma were put forth, which exhibited good to excellent sensitivity and specificity in triaging different exposure levels. The linear dose-effect relationship of lipid metabolites in the jejunum and the triage performance of radiation GI injury biomarkers in plasma were studied for the first time. The present study can provide insights into expanded biomarkers of IR-mediated GI injury and minimally invasive assays for evaluation.
title: Site Investigation of the Montague Salt-Water Seep, Montague County, Texas
Creators: name: Hovorka, Susan D.
name: Dutton, Alan R.
name: Paine, Jeffrey G.
Publisher: name: The University of Texas at Austin
Year: 1999
Subjects: subject: Montague Salt-Water Seep
subject: Montague County
subject: Texas
subject: site investigation
subject: environmental impact

description: The Bureau of Economic Geology, The University of Texas at Austin, investigated the Montague site (RRC Site Code 09-50211, District 9, Wichita Falls) for the Railroad Commission of Texas (RRC) between August 1996 and December 1997. The complaint is based on saltwater contamination of shallow ground water and on the formation of an area barren of vegetation on agricultural acreage. The barren ground lies on a Pleistocene alluvial terrace of the Red River just north of the Nocona North-Spanish Fort part of the Montague County Regular Field in an upland area underlain by Permian bedrock. This data report presents and interprets the hydrogeology of a subsurface saltwater plume at the site on the basis of geophysical data, cores and borehole logs, hydrological tests and water-level measurements, and analyses of the chemical composition of soil and ground water. This report also provides a preliminary interpretation of the saltwater sources, an assessment of possible impact on surface water and water-supply wells, and a prognosis for the barren ground without remediation.
Fluid structure interaction: Insights into biomechanical implications of endograft after thoracic endovascular aortic repair
Creators: name: Qiao, Yonghui
name: Mao, Le
name: Ding, Ying
name: Zhu, Ting
name: Luo, Kun
name: Fan, Jianren
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Thoracic endovascular aortic repair (TEVAR) has developed to be the most effective treatment for aortic diseases. This study aims to evaluate the biomechanical implications of the implanted endograft after TEVAR. We present a novel image-based, patient-specific, fluid-structure computational framework. The geometries of blood, endograft, and aortic wall were reconstructed based on clinical images. Patient-specific measurement data was collected to determine the parameters of the three-element Windkessel. We designed three postoperative scenarios with rigid wall assumption, blood-wall interaction, blood-endograft-wall interplay, respectively, where a two-way fluid-structure interaction (FSI) method was applied to predict the deformation of the composite stent-wall. Computational results were validated with Doppler ultrasound data. Results show that the rigid wall assumption fails to predict the waveforms of blood outflow and energy loss (EL). The complete storage and release process of blood flow energy, which consists of four phases is captured by the FSI method. The endograft implantation would weaken the buffer function of the aorta and reduce mean EL by 19.1%. The closed curve area of wall pressure and aortic volume could indicate the EL caused by the interaction between blood flow and wall deformation, which accounts for 68.8% of the total EL. Both the FSI and endograft have a slight effect on wall shear stress-related-indices. The deformability of the composite stent-wall region is remarkably limited by the endograft. Our results highlight the importance of considering the interaction between blood flow, the implanted endograft, and the aortic wall to acquire physiologically accurate hemodynamics in post-TEVAR computational studies and the deformation of the aortic wall is responsible for the major EL of the blood flow.
description: 25 pages, 8 figures
Elicitation probing for rare stems
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio file VP-070412-10: Elicitation of phonologically plausible combinations of Hupa sounds, attempting to identify rare stems that might not occur in texts very often. This method had been suggested by Michael Krauss based on his own fieldwork experience.
Accelerating the Computation of Dead and Concurrent Places using Reductions
Creators: name: Amat, Nicolas
name: Zilio, Silvano Dal
name: Botlan, Didier Le
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We propose a new method for accelerating the computation of a concurrency relation, that is all pairs of places in a Petri net that can be marked together. Our approach relies on a state space abstraction, that involves a mix between structural reductions and linear algebra, and a new data-structure that is specifically designed for our task. Our algorithms are implemented in a tool, called Kong, that we test on a large collection of models used during the 2020 edition of the Model Checking Contest. Our experiments show that the approach works well, even when a moderate amount of reductions applies.
Geodesic incompleteness and partially covariant gravity
Creators: name: Antoniadis, Ignatios
name: Cotsakis, Spiros
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the issue of length renormalization in the context of fully covariant gravity theories as well as non-relativistic ones such as Hořava-Lifshitz gravity. The difference of their symmetry groups implies a relation between the lengths of paths in spacetime in the two types of theory. Provided that certain asymptotic conditions hold, this relation allows us to transfer analytic criteria for the standard spacetime length to be finite to the Perelman length to be likewise finite, and therefore formulate conditions for geodesic incompleteness in partially covariant theories. We also discuss implications of this result for the issue of singularities in the context of such theories.
description: 16 pages
Additional file 3 of UBIAD1 alleviates ferroptotic neuronal death by enhancing antioxidative capacity by cooperatively restoring impaired mitochondria and Golgi apparatus upon cerebral ischemic/reperfusion insult
Creators: name: Huang, Yan
name: Liu, Jianyang
name: He, Jialin
name: Hu, Zhiping
name: Tan, Fengbo
name: Zhu, Xuelin
name: Yuan, Fulai
name: Jiang, Zheng
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Mental Health

description: Additional file 3. The levels of oxidative stress in H2O2 and NAC treatment neurons.
Phase Separation under Ultra-Slow Cooling: Onset of Nucleation
Creators: name: Vollmer, Juergen
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We discuss the interplay between a slow continuous drift of temperature, which induces continuous phase separation, and the non-linear diffusion term in the $ϕ^4$-model for phase separation of a binary mixture. This leads to a bound for the stability of diffusive demixing. It is argued that these findings are not specific to the $ϕ^4$ model, but that they always apply up to slight modifications of the bound. In practice stable diffusive demixing can only be achieved when special precautions are taken in experiments on real mixtures. Therefore, the recent observations on complex dynamical behavior in such systems should be considered as a new challenge for understanding generic features of phase-separating systems.
description: (9 pages, 7 figures)
On the detection of low-rank signal in the presence of spatially uncorrelated noise: a frequency domain approach
Creators: name: Rosuel, Alexis
name: Loubaton, Philippe
name: Vallet, Pascal
name: Mestre, Xavier
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: This paper analyzes the detection of a M-dimensional useful signal modeled as the output of a M xK MIMO filter driven by a K-dimensional white Gaussian noise, and corrupted by a M-dimensional Gaussian noise with mutually uncorrelated components. The study is focused on frequency domain test statistics based on the eigenvalues of an estimate of the spectral coherence matrix (SCM), obtained as a renormalization of the frequency-smoothed periodogram of the observed signal. If N denotes the sample size and B the smoothing span, it is proved that in the high-dimensional regime where M, B, N converge to infinity while K remains fixed, the SCM behaves as a certain correlated Wishart matrix. Exploiting well-known results on the behaviour of the eigenvalues of such matrices, it is deduced that the standard tests based on linear spectral statistics of the SCM fail to detect the presence of the useful signal in the high-dimensional regime. A new test based on the SCM, which is proved to be consistent, is also proposed, and its statistical performance is evaluated through numerical simulations.
External Shocks, UHECRs, and the Early Afterglow of GRBs
Creators: name: Dermer, Charles D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Highly variable gamma-ray pulses and X-ray flares in GRB light curves can result from external shocks rather than central engine activity under the assumption that the GRB blast-wave shell does not spread. Acceleration of cosmic rays to 10^{20} eV energies can take place in the external shocks of GRBs. Escape of hadronic energy in the form of UHECRs leads to a rapidly decelerating GRB blast wave, which may account for the rapid X-ray declines observed in Swift GRBs.
description: 6 pages, 1 figure, in Proc. of Swift and GRBs: Unveiling the Relativistic Universe, Venice, Italy, 5-9 June 2006