cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Entropic-force dark energy reconsidered
Creators: name: Basilakos, Spyros
name: Sola, Joan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We reconsider the entropic-force model in which both kind of Hubble terms ${\dot H}$ and $H^{2}$ appear in the effective dark energy (DE) density affecting the evolution of the main cosmological functions, namely the scale factor, deceleration parameter, matter density and growth of linear matter perturbations. However, we find that the entropic-force model is not viable at the background and perturbation levels due to the fact that the entropic formulation does not add a constant term in the Friedmann equations. On the other hand, if on mere phenomenological grounds we replace the ${\dot H}$ dependence of the effective DE density with a linear term $H$ without including a constant additive term, we find that the transition from deceleration to acceleration becomes possible but the recent structure formation data strongly disfavors this cosmological scenario. Finally, we briefly compare the entropic-force models with some related DE models (based on dynamical vacuum energy) which overcome these difficulties and are compatible with the present observations.
description: 11 pages, 1 figure accepted for publication by Physical Review D
Source-Rock, Reservoir and Hydrocarbon Mapping Using Far-Offset, Elastic Impedance and Extended Elastic Impedance Seismic Volumes, Volve Field, Offshore Norway, North Sea
Creators: name: Huy, Khanh Pham Le
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: AVO Classification, Elastic impedance, Extended elastic impedance, Inversion, Partial-angle stacked seismic

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 12-Jan
Quantum Resource Theory for Charge-Parity-Time Inversion
Creators: name: Skotiniotis, Michael
name: Toloui, Borzu
name: Durham, Ian T.
name: Sanders, Barry C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop a complete resource theory of charge-parity-time (CPT) inversion symmetry for both massive and massless relativistic particles of arbitrary spin. We show that a unitary representation of CPT can be consistently constructed for all spins and develop the resource theory associated with CPT super-selection, thereby identifying and quantifying the resources required to lift the super-selection rule.
description: Published version
Diagenetic controls on reservoir quality in the Miocene carbonate reservoir interval, offshore Myanmar
Creators: name: Chutchai Thiangtham
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: Miocene carbonate, diagenetic control, diagenetically evolved, diagenetic overprints, reservoir quality of carbonate.

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 13-24
Relative permeability as a stationary process: energy fluctuations in immiscible displacement
Creators: name: McClure, James E.
name: Fan, Ming
name: Berg, Steffen
name: Armstrong, Ryan T.
name: Berg, Carl Fredrik
name: Li, Zhe
name: Ramstad, Thomas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Relative permeability is commonly used to model immiscible fluid flow through porous materials. In this work we derive the relative permeability relationship from conservation of energy, assuming that the system to be non-ergodic at large length scales and relying on averaging in both space and time to homogenize the behavior. Explicit criteria are obtained to define stationary conditions: (1) there can be no net change for extensive measures of the system state over the time averaging interval; (2) the net energy inputs into the system are zero, meaning that the net rate of work done on the system must balance with the heat removed; and (3) there is no net work performed due to the contribution of internal energy fluctuations. Results are then evaluated based on direct numerical simulation. Dynamic connectivity is observed during steady-state flow, which is quantitatively assessed based the Euler characteristic. We show that even during steady-state flow at low capillary number ($\mathsf{Ca}\sim1\times10^5$), typical flow processes will explore multiple connectivity states. The residence time for each connectivity state is captured based on the time-and-space average. The distribution for energy fluctuations is shown to be multi-modal and non-Gaussian when terms are considered independently. However, we demonstrate that their sum is zero. Given an appropriate choice of the thermodynamic driving force, we show that the conventional relative permeability relationship is sufficient to model the energy dissipation in systems with complex pore-scale dynamics that routinely alter the structure of fluid connected pathways.
The nexus between contexts of crime risk and socioeconomic inequality on the rate of violent crime victimization
Creators: name: Giménez Santana, Alejandro
Publisher: name: No Publisher Supplied
Year: 2018

description: This study presents a novel approach to the study of neighborhood effects on crime. In this sense, it tests the varying influences that unique contexts of crime risk and socioeconomic inequality present on the spatial distribution of violent crime victimization rates across neighborhoods in the cities of Bogotá, Chicago, and Paris.This analysis utilizes both micro and neighborhood-level social and physical variables to study the spatial association between unique contexts of relative deprivation and crime risk with an increase in neighborhood-level violent crime rates. The presence of risky environments across neighborhoods is measured with ANROC and calculated using the RTM technique. The second independent variable is based on neighborhood-level Gini index data for income inequality. The association between the two predictors is tested using different multivariate OLS regression models. As per the results of this research, unique contexts of socioeconomic inequality and environmental risk are positively associated with an increase in neighborhood-level rates of violent crime victimization. This spatial relationship holds across the three case studies presented in this study with varying degrees of association regarding the inequality measure in three case studies.The current study proposes combining the study of community-specific contexts of crime risk and social contexts of socioeconomic inequality to explain the spatial distribution of violent crime rates across neighborhoods in a variety of study settings. The policy implications of this research study support the need for scientific evidence in the development of community-based strategies to improve risk management efforts to prevent and reduce violent crime. Additionally, community outreach programs and other social initiatives should be established to reduce the pervasive effect created by unique social contexts of socioeconomic inequality across neighborhoods.
DEPOSITION, DIAGENESIS AND RESERVOIR QUALITY OF SANDSTONE RESERVOIRS: A CASE STUDY IN THE CUU LONG BASIN, OFFSHORE VIETNAM
Creators: name: Trung, Son Nguyen
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: E and F formation, depositional environment, diagenetic process, petrography, porosity and permeability.

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 25-36
Superfluid, Supersolid and Checkerboard Solid in Two-Component Bosons in an Optical Lattice: Study by Means of Gross-Pitaevskii Theory and Monte-Carlo Simulations
Creators: name: Kuno, Y.
name: Suzuki, K.
name: Ichinose, I.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The bosonic t-J model is a strong-on-site repulsion limit of the two-component Bose-Hubbard model and is expected to be realized by experiments of cold atoms in an optical lattice. In previous papers, we studied the bosonic t-J model by both analytical methods and numerical Monte - Carlo (MC) simulations. However, in the case of finite $J_z$, where $J_z$ is the $z$-component coupling constant of the pseudospin interaction, the phase diagram of the model was investigated by assuming the checkerboard type of boson densities. In this study, we shall continue our previous study of the bosonic t-J model using both the Gross-Pitaevskii (GP) theory and MC simulations without assuming any pattern of boson densities. These two methods complement each other and give reliable results. We show that as $J_z$ is increased, the superfluid state evolves into a supersolid (SS), and furthermore into a genuine solid with the checkerboard symmetry. In the present study, we propose a method identifying quantum phase transitions in the GP theory. We also study finite-temperature phase transitions of the superfluidity and the diagonal solid order of the SS by MC simulations.
description: 22 pages, 16 figures, Version to appear in J.Phys.Soc.Jpn
MAPPING BASEMENT AND BASEMENT FAULTS FOR PREDICTION OF POTENTIAL BASEMENT RESERVOIRS USING SEISMIC ATTRIBUTES IN WESTERN BASIN, GULF OF THAILAND
Creators: name: Sofiyah Syairah Saifulizan
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: Carbonate Basement, Faults, Seismic Attributes, Western Basin, Gulf of Thailand

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 37-44
Reservoir Flow Unit Definition from Unit-Specific Permeability Estimates Using Wireline Logs and Core Data
Creators: name: Nuttapol Junput
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: Permeability Prediction, Southern Pattani Basin, Gulf of Thailand

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 45-55
Employing Correlation Corrections for Reduced Density Matrices in Symmetry-Adapted Perturbation Theory
Creators: name: Matviienko, Maksym
name: Hapka, Michał
Publisher: name: Zenodo
Year: 2023
Subjects: intermolecular interactions
symmetry-adapted perturbation theory
reduced density matrix functional theory
electrostatic energy
exchange energy

description: This is raw data to accompany the Bachelor's Thesis by Mr Maksym Matviienko. ENG Title: Employing Correlation Corrections for Reduced Density Matrices in Symmetry-Adapted Perturbation Theory. PL Title: Wykorzystanie poprawek korelacyjnych do zredukowanych macierzy gęstości w rachunku zaburzeń o adaptowanej symetrii.
Optimization of diamond optomechanical crystal cavities
Creators: name: Moraes, Flavio
name: de Aguiar, Gabriel H. M.
name: de Melo, Emerson G.
name: Wiederhecker, Gustavo S.
name: Alegre, Thiago P. Mayer
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Due to recent development of growing and processing techniques for high-quality single crystal diamond, the large scale production of diamond optomechanical crystal cavities becomes feasible, enabling optomechanical devices that can operate in higher mechanical frequencies and be coupled to two-level systems based on diamond color centers. In this paper we describe a design optimization method to produce diamond optomechanical crystal (OMC) cavities operating at the high-cooperativity regime (close to unity) at room temperature.
RESERVOIR AND HYDROCARBON MAPPING USING FAR-OFFSET AND EXTENDED ELASTIC IMPEDANCE SEISMIC VOLUMES, WESTERN BASIN, GULF OF THAILAND
Creators: name: Gasiani, Devi
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: Elastic impedance, Inversion, Seismic attributes, Partial-angle stacked seismic

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 56-67
SALT TECTONICS CONTROL ON RESERVOIR GEOMETRY, VOLVE FIELD, NORTH SEA Thuan Van Nguyen
Creators: name: Nguyen, Thuan Van
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: Salt Tectonics, Volve Field, Zechstein Supergroup, Minibasin, Reservoir Geometry

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 68-79
LINVIEW: Incremental View Maintenance for Complex Analytical Queries
Creators: name: Nikolic, Milos
name: ElSeidy, Mohammed
name: Koch, Christoph
Publisher: name: arXiv
Year: 2014
Subjects: subject: Databases (cs.DB)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: H.2.4; G.1.3

description: Many analytics tasks and machine learning problems can be naturally expressed by iterative linear algebra programs. In this paper, we study the incremental view maintenance problem for such complex analytical queries. We develop a framework, called LINVIEW, for capturing deltas of linear algebra programs and understanding their computational cost. Linear algebra operations tend to cause an avalanche effect where even very local changes to the input matrices spread out and infect all of the intermediate results and the final view, causing incremental view maintenance to lose its performance benefit over re-evaluation. We develop techniques based on matrix factorizations to contain such epidemics of change. As a consequence, our techniques make incremental view maintenance of linear algebra practical and usually substantially cheaper than re-evaluation. We show, both analytically and experimentally, the usefulness of these techniques when applied to standard analytics tasks. Our evaluation demonstrates the efficiency of LINVIEW in generating parallel incremental programs that outperform re-evaluation techniques by more than an order of magnitude.
description: 14 pages, SIGMOD
Coherent control and feedback cooling in a remotely-coupled hybrid atom-optomechanical system
Creators: name: Bennett, James S.
name: Madsen, Lars S.
name: Baker, Mark
name: Rubinsztein-Dunlop, Halina
name: Bowen, Warwick P
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Cooling to the motional ground state is an important first step in the preparation of nonclassical states of mesoscopic mechanical oscillators. Light-mediated coupling to a remote atomic ensemble has been proposed as a method to reach the ground state for low frequency oscillators. The ground state can also be reached using optical measurement followed by feedback control. Here we investigate the possibility of enhanced cooling by combining these two approaches. The combination, in general, outperforms either individual technique, though atomic ensemble-based cooling and feedback cooling each individually dominate over large regions of parameter space.
description: 28 pages, 5 figures, 2 tables. Updated to include exemplary experimental parameters and expanded discussion of noise sources
On the first order corrections to the black hole thermodynamics in higher curvature theories of gravity
Creators: name: Xiao, Yong
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In modified theories of gravity, higher curvature terms may be added to the Einstein-Hilbert action. Conventionally, the effects of the higher curvature terms on the black hole thermodynamics are rather difficult to obtain. In this paper, we show that, at least at the first order level, the corrections to the thermodynamics of the Schwarzschild black hole can be easily obtained, without solving the modified black hole metric. We examine some specific examples, which produces the known results in the literature, as well as those previously unknown. Furthermore, we find some nonperturbative exact results by generalizing the first-order analysis. In particular, a novel relation between the Euclidean integrals of the Einstein--Hilbert term and the higher curvature terms is found and proved.
description: 7 pages, no figures, the latest version accepted by PRD
A machine learning classifier for LOFAR radio galaxy cross-matching techniques
Creators: name: Alegre, Lara
name: Sabater, Jose
name: Best, Philip
name: Mostert, Rafaël I. J.
name: Williams, Wendy L.
name: Gürkan, Gülay
name: Hardcastle, Martin J.
name: Kondapally, Rohit
name: Shimwell, Tim W.
name: Smith, Daniel J. B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: New-generation radio telescopes like LOFAR are conducting extensive sky surveys, detecting millions of sources. To maximise the scientific value of these surveys, radio source components must be properly associated into physical sources before being cross-matched with their optical/infrared counterparts. In this paper, we use machine learning to identify those radio sources for which either source association is required or statistical cross-matching to optical/infrared catalogues is unreliable. We train a binary classifier using manual annotations from the LOFAR Two-metre Sky Survey (LoTSS). We find that, compared to a classification model based on just the radio source parameters, the addition of features of the nearest-neighbour radio sources, the potential optical host galaxy, and the radio source composition in terms of Gaussian components, all improve model performance. Our best model, a gradient boosting classifier, achieves an accuracy of 95 per cent on a balanced dataset and 96 per cent on the whole (unbalanced) sample after optimising the classification threshold. Unsurprisingly, the classifier performs best on small, unresolved radio sources, reaching almost 99 per cent accuracy for sources smaller than 15 arcsec, but still achieves 70 per cent accuracy on resolved sources. It flags 68 per cent more sources than required as needing visual inspection, but this is still fewer than the manually-developed decision tree used in LoTSS, while also having a lower rate of wrongly accepted sources for statistical analysis. The results have an immediate practical application for cross-matching the next LoTSS data releases and can be generalised to other radio surveys.
description: Accepted for publication in MNRAS. 24 pages, 13 Figures. Submission includes a data table which is also available at https://drive.google.com/file/d/1mwKWJW6oCqh-joNR1uV3PPPYDdYz0n_J/view?usp=sharing
Structural geology related with fracture development and fluid evolution at Khao Tham Phedan, Nakhon Sawan Province, Central Thailand
Creators: name: Thanaset Chuchaem
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: Permian carbonate Thailand, Fracture development, Diagenetic history, Stable carbonoxygen isotope.

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 80-89
Dynamical locality of the free Maxwell field
Creators: name: Fewster, Christopher J.
name: Lang, Benjamin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider the non-interacting source-free Maxwell field, described both in terms of the vector potential and the field strength. Starting from the classical field theory on contractible globally hyperbolic spacetimes, we extend the classical field theory to general globally hyperbolic spacetimes in two ways to obtain a "universal" theory and a "reduced" theory. The quantum field theory in terms of the unital $*$-algebra of the smeared quantum field is then obtained by an application of a suitable quantisation functor. We show that the universal theories fail local covariance and dynamical locality owing to the possibility of having non-trivial radicals in the classical and non-trivial centres in the quantum case. The reduced theories are both locally covariant and dynamically local. These models provide new examples relevant to the discussion of how theories should be formulated so as to describe the same physics in all spacetimes.
description: 27pp v3: Some comments added; minor corrections and typos fixed
Prädiktiver Betrieb von  Multi-Hybrid-Antrieben im SPNV
Creators: name: Eller, Marco
Publisher: name: Karlsruhe
Year: 2019
Subjects: ÖPNV
SPNV
Hybridantrieb
Multihybrid
Dieselhybrid
Triebwagen
Dieseltriebwagen
Schienenfahrzeuge

description: Wichtige Kriterien für den Personennahverkehr sind eine hohe Fahrgastkapazität und ein niedriger spezifischer Kraftstoffverbrauch. Daher ist die Bahn ideal, um die notwendigen Transportleistungen im täglichen Pendelverkehr zu erbringen. Die Nebenstrecken von ländlichen Gebieten in die Städte hinein sind meist nicht- oder nur teilelektrifiziert, da neben den Pendlern kaum ein zusätzliches Fahrgastaufkommen vorhanden ist und diese auch für den Güterverkehr meist keine Bedeutung haben.  Um die Vorteile von elektrischen Antrieben wie Rekuperation von Bremsenergie und leisem Betrieb auf solchen Strecken realisieren zu können, bieten sich hybride Fahrzeugkonfigurationen an. Diese versprechen großes Potenzial durch häufige Halte und kurze Haltestellenabstände.   Klassische Dieseltriebwagen setzen auf mehrere getrennte Antriebsanlagen, die sich jeweils an den Zugenden befinden. Werden sie um Elektromotoren ergänzt, ergeben sich viele zusätzliche Freiheitsgrade, deren Optimierung aber komplexere Herangehensweisen als bisher erfordern. Neben der Möglichkeit, die momentan aktiven Maschinen einzeln zu selektieren, bietet selbst ein einfaches Hybridsystem mit nur einer Antriebsanlage die Möglichkeit der dynamischen und nahezu unbeschränkten Aufteilung der Drehmomente zwischen ihnen. Erweitert man diesen Hybrid um zusätzliche Antriebsanlagen im gleichen Fahrzeug auf ein Multi-Hybrid-System oder betreibt sie in Mehrfachtraktion, wird zur Gesamtsystemoptimierung eine übergeordnete Steuereinheit erforderlich, die die Drehmomente entsprechend des Wirkungsgrades am momentanen Lastpunkt sinnvoll aufteilt.  Ziel dieser Arbeit ist es, auf Basis der Bewertungskriterien „mögliche Kraftstoffeinsparung“, „Komplexität der Implementierung“ und „Echtzeitfähigkeit“ eine Betriebsstragie samt zugehörigem Fahrzeugenergiemanagement zu entwerfen. Dafür wurden drei verschiedene Ansätze - Fuzzylogik, Kraftstoffäquivalenzverfahren (ECMS) und dynamische Programmierung nach Bellman (DP) - ausgearbeitet, implementiert und ausgewertet.
Mapping reservoir geometry and interpretation of depositional environment by integrating seismic attributes with well data, Western basin, Gulf of Thailand
Creators: name: Noppasin Pronsawad
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: Reservoir geometry, Depositional environment, Integrating seismic attributes with well data, Western basin.

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 90-99
Particle-surface interactions in a uniform electric field
Creators: name: Wang, Zhanwen
name: Miksis, Michael J.
name: Vlahovska, Petia M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The electrostatic force on a spherical particle near a planar surface is calculated for the cases of a uniform electric field applied in either normal or tangential direction to the surface. The particle and suspending media are assumed to be weakly conducting, so that that the leaky dielectric model applies. The Laplace equation for the electric potential is solved in bipolar coordinate system and the potential is obtained in terms of a series expansion of Legendre polynomials. The force on the particle is calculated using the Maxwell tensor. We find that in the case of normal electric field, which corresponds to a particle near an electrode, the force is always attractive but at a given separation it varies nontrivially with particle-suspending medium conductivity ratio; the force on a particle that is more conducting than the suspending medium is much larger compared to the force on a particle less conducing than the suspending medium. In the case of tangential electric field, which corresponds to a particle near an insulating boundary, the force is always repulsive.
Identification of Internal Salt Body Geometry Using Seismic Attributes, Volve Field, North Sea
Creators: name: Ratapong Jamroenkahjohnsuk
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: Seismic attributes, Volve field, Salt Identification

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 100-110
Covariant Density Functional Theory with Localized Exchange Terms
Creators: name: Zhao, Qiang
name: Ren, Zhengxue
name: Zhao, Pengwei
name: Meng, Jie
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A new density-dependent point-coupling covariant density functional PCF-PK1 is proposed, where the exchange terms of the four-fermion terms are local and are taken into account with the Fierz transformation. The coupling constants of the PCF-PK1 functional are determined by empirical saturation properties and ab initio equation of state and proton-neutron Dirac mass splittings for nuclear matter as well as the ground-state properties of selected spherical nuclei. The success of the PCF-PK1 is illustrated with properties of the infinite nuclear matter and finite nuclei including the ground-state properties and the Gamow-Teller resonances. In particular, the PCFPK1 eliminates the spurious shell closures at Z = 58 and Z = 92, which exist commonly in many covariant density functionals without exchange terms. Moreover, the Gamow-Teller resonances are nicely reproduced without any adjustable parameters, and this demonstrates that a self-consistent description for the Gamow-Teller resonances can be achieved with the localized exchange terms in the PCF-PK1. ?
description: 35 pages, 14 figures
Magneto-elastic modes and lifetime of magnons in thin yttrium-iron garnet films
Creators: name: Rückriegel, Andreas
name: Kopietz, Peter
name: Bozhko, Dmytro A.
name: Serga, Oleksandr A.
name: Hillebrands, Burkard
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We calculate the effects of the spin-lattice coupling on the magnon spectrum of thin ferromagnetic films consisting of the magnetic insulator yttrium-iron garnet. The magnon-phonon hybridisation generates a characteristic minimum in the spin dynamic structure factor which quantitatively agrees with recent Brillouin light scattering experiments. We also show that at room temperature the phonon contribution to the magnon damping exhibits a rather complicated momentum dependence: In the exchange regime the magnon damping is dominated by Cherenkov type scattering processes, while in the long-wavelength dipolar regime these processes are subdominant and the magnon damping is two orders of magnitude smaller. We supplement our calculations by actual measurements of the magnon relaxation in the dipolar regime. Our theory provides a simple explanation of a recent experiment probing the different temperatures of the magnon and phonon gases in yttrium-iron garnet.
description: 15 pages, 9 figures
BOSHLANGI’CH TA’LIMDA O’QITUVCHI NUTQINI OSHIRISH MEZONLARI
Creators: name: Solejonova Mexrubon
Publisher: name: Ta’lim fidoyilari
Year: 2023

description: Anatatsiya Ushbu maqoloda Boshlang’ich ta’limda o’qituvchining nutqi ifodaligi, ta’sirchanligi nutqning sofligi , aniqligi olimlarning nutq haqida aytgan fikrlari mashhur mashshoyixlar aytgan ta’sirli so’zlar yoritib berilgan.
Análise de processos jurídicos: Caso 06 - Processo No 0806538-05.2018.4.05.8100; IPL n. 0386/2017 - SR/DPF/CE; EPOL n. 2020.0052224 - SR/PF/CE); Notícia de Fato n. 1.15.000.002656/2016-54; Voto No 1365/2022; Ação Trabalhista n. 0001168-56.2016.5.07.0034.
Creators: name: BRASIL. Ministério Da Justiça
Publisher: name: Zenodo
Year: 2023

description: Análise de processos jurídicos: Caso 06 - Processo No 0806538-05.2018.4.05.8100; IPL n. 0386/2017 - SR/DPF/CE; EPOL n. 2020.0052224 - SR/PF/CE); Notícia de Fato n. 1.15.000.002656/2016-54; Voto No 1365/2022; Ação Trabalhista n. 0001168-56.2016.5.07.0034.
genetic Evolution and Isotopic Characteristics of a Clast Breccia Reservoir in Nang Nuan Field, Chumphon Basin, Gulf of Thailand
Creators: name: Tongsuk, Soraya
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: Nang Nuan, Diagenesis, Hydrothermal, Karstification, Clast Breccia, Telogenetic fluid

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 111-121
Efficient calculation of inelastic vibration signals in electron transport: Beyond the wide-band approximation
Creators: name: Lü, Jing-Tao
name: Christensen, Rasmus B.
name: Foti, Giuseppe
name: Frederiksen, Thomas
name: Gunst, Tue
name: Brandbyge, Mads
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We extend the simple and efficient lowest order expansion (LOE) for inelastic electron tunneling spectroscopy (IETS) to include variations in the electronic structure on the scale of the vibration energies. This enables first-principles calculations of IETS lineshapes for molecular junctions close to resonances and band edges. We demonstrate how this is relevant for the interpretation of experimental IETS using both a simple model and atomistic first-principles simulations.
description: 5 pages, 3 figures, PRB accepted version
Energy-filtered random-phase states as microcanonical thermal pure quantum states
Creators: name: Seki, Kazuhiro
name: Yunoki, Seiji
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We propose a method to calculate finite-temperature properties of a quantum many-body system for a microcanonical ensemble by introducing a pure quantum state named here an energy-filtered random-phase state, which is also a potentially promising application of near-term quantum computers. In our formalism, a microcanonical ensemble is specified by two parameters, i.e., the energy of the system and its associated energy window. Accordingly, the density of states is expressed as a sum of Gaussians centered at the target energy with its spread corresponding to the width of the energy window. We then show that the thermodynamic quantities such as entropy and temperature are calculated by evaluating the trace of the time-evolution operator and the trace of the time-evolution operator multiplied by the Hamiltonian of the system. We also describe how these traces can be evaluated using random diagonal-unitary circuits appropriate to quantum computation. The pure quantum state representing our microcanonical ensemble is related to a state of the form introduced by Wall and Neuhauser for the filter diagonalization method [M. R. Wall and D. Neuhauser, J. Chem. Phys. 102, 8011 (1995)], and therefore we refer to it as an energy-filtered random-phase state. The energy-filtered random-phase state is essentially a Fourier transform of a time-evolved state whose initial state is prepared as a random-phase state, and the cut-off time in the time-integral for the Fourier transform sets the inverse of the width of the energy window. The proposed method is demonstrated numerically by calculating thermodynamic quantities for the one-dimensional spin-1/2 Heisenberg model on small clusters up to 28 qubits, showing that the method is most efficient for the target energy around which the dense distribution of energy eigenstates is found.
description: 23 pages, 12 figures
Supplementary Figure S1. A time-lapse image of aligned Sepsis neocynipsea pre-pupae.; Supplementary Figure S2. Scutum width of Themira biloba as body size measure.; Supplementary Figure S3. Mean absolute sexual difference (m-f) in scutum width (left) and pupal volume (right) ± 95% CI, two measures of sexual size dimorphism, for the 18 core sepsid species used in our study (cf. Table 1 for species abbreviations).; Supplementary Figure S4. Mean absolute sexual difference (m-f) in larval (left), pupal (middle), and total development time ± 95% CI for the 18 core sepsid species used in our study (cf. Table 1 for species abbreviations).; ANOVA tables assessing the effect of the three measured sexual ornaments on larval, pupal and total developmental duration.
Creators: name: Rajaratnam, Gowri
name: Liu, Gerald
name: Su, Kathy F. Y.
name: Chew, Martin S. J.
name: Ang, Yuchen
name: Puniamoorthy, Nalini
name: Rohner, Patrick T.
name: Blanckenhorn, Wolf U.
name: Meier, Rudolf
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: 60801 Animal Behaviour

description: Supplementary Figure S1. A time-lapse image of aligned Sepsis neocynipsea pre-pupae.; Supplementary Figure S2. Scutum width of Themira biloba as body size measure.; Supplementary Figure S3. Mean absolute sexual difference (m-f) in scutum width (left) and pupal volume (right) ± 95% CI, two measures of sexual size dimorphism, for the 18 core sepsid species used in our study (cf. Table 1 for species abbreviations).; Supplementary Figure S4. Mean absolute sexual difference (m-f) in larval (left), pupal (middle), and total development time ± 95% CI for the 18 core sepsid species used in our study (cf. Table 1 for species abbreviations).; Tables S1-S3: ANOVA tables assessing the effect of (1) sternite size and complexity, (2) foreleg size and complexity, and (3) clasper size and complexity on larval, pupal and total developmental duration.
The 1/N correction in the D3-brane description of circular Wilson loop at strong coupling
Creators: name: Buchbinder, E. I.
name: Tseytlin, A. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the one-loop correction to the probe D3-brane action in AdS5 x S5 expanded around the classical Drukker-Fiol solution ending on a circle at the boundary. It is given essentially by the logarithm of the one-loop partition function of an Abelian ${\cal N}=4$ vector multiplet in AdS2 x S2 geometry. This one-loop correction is expected to describe the subleading 1/N term in the expectation value of circular Wilson loop in the totally symmetric rank k representation in SU(N) SYM theory at strong coupling. In the limit k << N when the circular Wilson loop expectation values for the symmetric representation and for the product of k fundamental representations are expected to match we find that this one-loop D3-brane correction agrees with the gauge theory result for the k-fundamental case.
description: 20 pages; v2: reference added, misprints corrected; v3: minor corrections, reference added
The Essential Character of the Neutrino Mechanism of Core-Collapse Supernova Explosions
Creators: name: Wang, Tianshu
name: Vartanyan, David
name: Burrows, Adam
name: Coleman, Matthew S. B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Calibrating with detailed 2D core-collapse supernova simulations, we derive a simple core-collapse supernova explosion condition based solely upon the terminal density profiles of state-of-the-art stellar evolution calculations of the progenitor massive stars. This condition captures the vast majority of the behavior of the one hundred 2D state-of-the-art models we performed to gauge its usefulness. The goal is to predict, without resort to detailed simulation, the explodability of a given massive star. We find that the simple maximum fractional ram pressure jump discriminant we define works well ~90% of the time and we speculate on the origin of the few false positives and false negatives we witness. The maximum ram pressure jump generally occurs at the time of accretion of the silicon/oxygen interface, but not always. Our results depend upon the fidelity with which the current implementation of our code Fornax adheres to Nature and issues concerning the neutrino-matter interaction, the nuclear equation of state, the possible effects of neutrino oscillations, grid resolution, the possible role of rotation and magnetic fields, and the accuracy of the numerical algorithms employed remain to be resolved. Nevertheless, the explodability condition we obtain is simple to implement, shows promise that it might be further generalized while still employing data from only the unstable Chandrasekhar progenitors, and is a more credible and robust simple explosion predictor than can currently be found in the literature.
description: 20 pages, 17 figures. Accepted by MNRAS
CO-dark gas and molecular filaments in Milky Way type galaxies
Creators: name: Smith, Rowan J.
name: Glover, Simon C. O.
name: Clark, Paul C.
name: Klessen, Ralf S.
name: Springel, Volker
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use the moving mesh code AREPO coupled to a time-dependent chemical network to investigate the formation and destruction of molecular gas in simulated spiral galaxies. This allows us to determine the characteristics of the gas that is not traced by CO emission. Our extremely high resolution AREPO simulations allow us to capture the chemical evolution of the disc, without recourse to a parameterised `clumping factor'. We calculate H2 and CO column densities through our simulated disc galaxies, and estimate the CO emission and CO-H2 conversion factor. We find that in conditions akin to those in the local interstellar medium, around 42% of the total molecular mass should be in CO-dark regions, in reasonable agreement with observational estimates. This fraction is almost insensitive to the CO integrated intensity threshold used to discriminate between CO-bright and CO-dark gas, as long as this threshold is less than 10 K km/s. The CO-dark molecular gas primarily resides in extremely long (>100 pc) filaments that are stretched between spiral arms by galactic shear. Only the centres of these filaments are bright in CO, suggesting that filamentary molecular clouds observed in the Milky Way may only be small parts of much larger structures. The CO-dark molecular gas mainly exists in a partially molecular phase which accounts for a significant fraction of the total disc mass budget. The dark gas fraction is higher in simulations with higher ambient UV fields or lower surface densities, implying that external galaxies with these conditions might have a greater proportion of dark gas.
description: Accepted by MNRAS
O Bibliotecário como mediador das tecnologias de informação e comunicação no contexto educacional do ensino superior
Creators: name: Xavier, Catarina Maria Ramalho
Publisher: name: Zenodo
Year: 2023
Subjects: Mediação da informação
Ensino superior.
Tecnologias da informação
Disseminação da informação
Bibliotecário educador

description: O presente artigo tem por objetivo apresentar a relevância do bibliotecário enquanto mediador das tecnologias da informação e comunicação no âmbito do ensino superior. Destaca-se quais são suas competências, tanto básicas quanto essenciais para que o bibliotecário possa desempenhar com satisfação sua profissão em meio a ‘era da informação’, da qual faz-se necessário adquirir outras habilidades, tanto técnicas, quanto interpessoais. Dentro do contexto do ensino superior, o bibliotecário tem como principal função ‘apoiar as atividades de ensino, pesquisa e extensão’ dando suporte aos docentes e alunos na procura pela informação certa e atualizada. Enfatiza-se a função educadora do bibliotecário na disseminação das tecnologias de informação e comunicação, cabendo ao bibliotecário adotar metodologias e estratégias para disseminá-las, bem como mapear as deficiências dos usuários em utilizá-las, cabendo ao profissional da informação adaptar as TICS para os serviços e produtos que serão oferecidos pela biblioteca. Como mediador, o bibliotecário deve também estimular o senso crítico dos usuários em relação à seleção e filtragem da informação, visto que há um aumento exponencial de informações, e que muitas vezes, causa insegurança quanto à confiabilidade das fontes. Ressalta a relevância do bibliotecário em firmar parcerias com os docentes, já que ambos caminham juntos na formação acadêmica do aluno, assim sendo, ele pode propor atividades de treinamentos em bases de dados, viabilizando recursos didáticos digitais para serem utilizados pelo docente em sala de aula, focando na pesquisa bibliográfica em fontes confiáveis, além de ensinar como utilizar as TICS em favor de um melhor desempenho no processo de ensino-aprendizagem.
Seismic Sequence Stratigraphy and Deepwater Turbidite Characteristics in The East Andaman Basin, Offshore Myanmar
Creators: name: Sudarat Charoensrisomboon
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: seismic sequence stratigraphy, deepwater turbidite, turbidite, East Andaman Basin.

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 122-133
Atomic diffusion and turbulent mixing in solar-like stars: Impact on the fundamental properties of FG-type stars
Creators: name: Moedas, Nuno
name: Deal, Morgan
name: Bossini, Diego
name: Campilho, Bernardo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Chemical composition is an important factor that affects stellar evolution. The element abundance on the stellar surface evolves along the lifetime of the star because of transport processes, including atomic diffusion. However, models of stars with masses higher than about 1.2Msun predict unrealistic variations at the stellar surface. This indicates the need for competing transport processes that are mostly computationally expensive for large grids of stellar models. The purpose of this study is to implement turbulent mixing in stellar models and assess the possibility of reproducing the effect of radiative accelerations with turbulent mixing for elements like iron in order to make the computation of large grids possible. We computed stellar models with MESA and assessed the effects of atomic diffusion (with radiative acceleration) in the presence of turbulent mixing. We parametrised the effect of radiative accelerations on iron with a turbulent diffusion coefficient. Finally, we tested this parametrisation by modelling two F-type stars of the Kepler Legacy sample. We found that, for iron, a parametrisation of turbulent mixing that simulates the effect of radiative acceleration is possible. This leads to an increase in the efficiency of the turbulent mixing to counteract the effect of gravitational settling. This approximation does not affect significantly the surface abundances of the other elements we studied, except for oxygen and calcium. We demonstrate that this parametrisation has a negligible impact on the accuracy of the seismic properties inferred with these models. Moreover, turbulent mixing makes the computation of realistic F-type star models including the effect atomic diffusion possible. This leads to differences of about 10% in the inferred ages compared to results obtained with models that neglect these processes.
description: 16 pages, 12 figures, accepted for publication in A&A
The Use of Seismic Attributes for Submarine Channel Interpretation in Deepwater Taranaki Basin, New Zealand
Creators: name: Kritanol Naewboonnien
Publisher: name: Department of Geology, Chulalongkorn University
Year: 2019
Subjects: Submarine Channel, Seismic Attribute, Seismic Facies, Architectural Element, Sand Distribution

description: Bulletin of Earth Sciences of Thailand (BEST), 11, 2, 134-143
title: Морфофункциональные особенности различных типов каналов цитоплазматической мембраны
Creators: name: Бонь, Елизавета
name: Максимович, Наталия
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2020

description: Каналы цитоплазматической мембраны — это крупные белки, образующие центральную водную пору, которая сообщает наружную и внутреннюю среду клетки, пронизывая клеточную мембрану. Они выполняют целый ряд функций. Обеспечивая транспорт ионов и воды через мембрану, внутриклеточную концентрацию ионов кальция, каналы регулируют рН и объем клетки. Часто являясь рецепторами, они включены в системную регуляцию функций отдельных клеток, органов и систем организма в целом. С каждым годом количество обнаруженных каналов цитоплазматической мембраны увеличивается, а количество их подтипов с учетом особенностей молекулярного строения и фармакологических свойств возрастает многократно, что обуславливает необходимость формирования четкого представления о морфофункциональных особенностях различных их типов. Цель данного обзора — обобщение и систематизация данных литературы о морфофункциональных особенностях различных типов каналов цитоплазматической мембраны.
Análise de processos jurídicos: Caso 07 - Análise de processos jurídicos: Voto 317/2022 PGR-00026994/2022; Procedimento: 1.20.000.001031/2020-91
Creators: name: BRASIL. Ministério Da Justiça
Publisher: name: Zenodo
Year: 2023

description: Análise de processos jurídicos: Caso 07 - Voto 317/2022 PGR-00026994/2022; Procedimento: 1.20.000.001031/2020-91
First-photon target detection: Beating Nair's pure-loss performance limit
Creators: name: Shapiro, Jeffrey H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In 2011, Nair published a no-go theorem for quantum radar target detection [Phys. Rev. A {\bf 84}, 032312 (2011)]. He showed, under fairly general assumptions, that a coherent-state radar's error probability was within a factor of two of the best possible quantum performance for the pure-loss (no background radiation) channel whose roundtrip radar-to-target-to-radar transmissivity $κ$ satisfies $κ\ll 1$. We introduce first-photon radars (FPRs) to circumvent and beat Nair's performance limit. FPRs transmit a periodic sequence of pulses, each containing $N_S$ photons on average, and perform ideal direct detection (photon counting at unit quantum efficiency and no dark counts) on the returned radiation from each transmission until at least one photon has been detected or a pre-set maximum of $M$ pulses has been transmitted. They decide a target is present if and only if they detect one or more photons. We consider both quantum (each transmitted pulse is a number state) and classical (each transmitted pulse is a coherent state) FPRs, and we show that their error-probability exponents are nearly identical when $κ\ll 1$. With the additional assumption that $κN_S \ll 1$, we find that their advantage in error-probability exponent over Nair's performance limit grows to 3 dB as $M \rightarrow \infty$. However, because FPRs' pulse-repetition period must exceed the radar-to-target-to-radar propagation delay, their use in standoff sensing of moving targets will likely employ $κN_S \sim 1$ and $M \sim 10$ and achieve ~2 dB advantage. Our work constitutes a new no-go theorem for quantum radar target detection.
description: 11 pages, 1 table