cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cosmological perturbations in a gravity with quadratic order curvature couplings
Creators: name: Noh, H.
name: Hwang, J.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a set of equations describing the evolution of the scalar-type cosmological perturbation in a gravity with general quadratic order curvature coupling terms. Equations are presented in a gauge ready form, thus are ready to implement various temporal gauge conditions depending on the problems. The Ricci-curvature square term leads to a fourth-order differential equation for describing the spacetime fluctuations in a spatially homogeneous and isotropic cosmological background.
description: 5 pages, no figure, To appear in Phys. Rev. D
Bridging the Last Mile Gap in Qatar: Parcel Delivery Services
Creators: name: Jamous, Rana Yaser
Publisher: name: Manara - Qatar Research Repository
Year: 2025
Subjects: classificationCode: 40
subject: Engineering

description: E-commerce is a twenty-first century nightmare for parcel delivery companies as the pace of e-commerce growth is exponentially increasing and outmatching the forecasted demand. In the last ten years, the ways of optimizing the last mile parcel delivery process have grabbed academics’ attention. Different innovative ideas and solutions have been proposed; some were applied and were successful and others are still under study. The successful e-commerce and last mile companies all originated from Europe and the United States of America—USA. However, the Middle East region is in the process of developing a logistics infrastructure and improving its traditional services. The aim of this research was to gather all the information related to the last mile that helps in having a holistic idea about the variables that impact the efficiency and effectiveness of the process. The information was gathered from a large review of the literature and the international best practices. In order to understand the local market and the local customers’ needs, semi-structured interviews and an online survey were conducted. The semi-structured interviews were with governmental parcel delivery company from the local market. The company provided an insight on the parcel delivery journey from the receival of the shipment until the delivery. In contrast, the online survey targeted the local customers from all segments and ages. The aim of the survey was to draw up an idea about the customers’ behavior and preferences, to measure their level of awareness on the services provided by the parcel delivery companies, and also to measure their level of satisfaction. Customers’ feedback and opinions on the last mile package delivery services in Qatar was collected to give a better vision on the gaps from the locals’ perspective. The outputs gathered from the literature review, case studies, local market analysis and customers study were used to form a set of enhancement suggestions for the last mile package delivery services companies in the State of Qatar. The proposed enhancements are divided into different phases of application to help in gradual growth. The outcome enhancements of this study can be applied in any Middle Eastern country that matches the culture of the State of Qatar.
Supertwistors as Quarks of SU(2,2|4)
Creators: name: Claus, Piet
name: Gunaydin, Murat
name: Kallosh, Renata
name: Rahmfeld, J.
name: Zunger, Yonatan
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The GS superstring on AdS_5 x S^5 has a nonlinearly realized, spontaneously broken SU(2,2|4) symmetry. Here we introduce a two-dimensional model in which the unbroken SU(2,2|4) symmetry is linearly realized. The basic variables are supertwistors, which transform in the fundamental representation of this supergroup. The quantization of this supertwistor model leads to the complete oscillator construction of the unitary irreducible representations of the centrally extended SU(2,2|4). They include the states of d=4 SYM theory, massless and KK states of AdS_5 supergravity, and the descendants on AdS_5 of the standard massive string states, which form intermediate and long supermultiplets. We present examples of such multiplets and discuss possible states of solitonic and (p,q) strings.
description: 12 pages, LaTeX, 1 EPS figure
The universal emergence of self-affine roughness from deformation
Creators: name: Hinkle, Adam R.
name: Nöhring, Wolfram
name: Pastewka, Lars
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Most natural and man-made surfaces appear to be rough on many length scales. There is presently no unifying theory of the origin of roughness or the self-affine nature of surface topography. One likely contributor to the formation of roughness is deformation, which underlies many processes that shape surfaces such as machining, fracture, and wear. Using molecular dynamics, we simulate the bi-axial compression of single-crystal Au, the high-entropy alloy Ni$_{36.67}$Co$_{30}$Fe$_{16.67}$Ti$_{16.67}$, and amorphous Cu$_{50}$Zr$_{50}$, and show that even surfaces of homogeneous materials develop a self-affine structure. By characterizing subsurface deformation, we connect the self-affinity of the surface to the spatial correlation of deformation events occurring within the bulk and present scaling relations for the evolution of roughness with strain.
description: 16 pages, 6 figures
Curved Space, curved Time, and curved Space-Time in Schwarzschild geodetic geometry
Creators: name: Eufrasio, Rafael T.
name: Mecholsky, Nicholas A.
name: Resca, Lorenzo
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate geodesic orbits and manifolds for metrics associated with Schwarzschild geometry, considering space and time curvatures separately. For `a-temporal' space, we solve a central geodesic orbit equation in terms of elliptic integrals. The intrinsic geometry of a two-sided equatorial plane corresponds to that of a full Flamm's paraboloid. Two kinds of geodesics emerge. Both kinds may or may not encircle the hole region any number of times, crossing themselves correspondingly. Regular geodesics reach a periastron greater than the $r_S$ Schwarzschild radius, thus remaining confined to a half of Flamm's paraboloid. Singular or $s$-geodesics tangentially reach the $r_S$ circle. These $s$-geodesics must then be regarded as funneling through the `belt' of the full Flamm's paraboloid. Infinitely many geodesics can possibly be drawn between any two points, but they must be of specific regular or singular types. A precise classification can be made in terms of impact parameters. Geodesic structure and completeness is conveyed by computer-generated figures depicting either Schwarzschild equatorial plane or Flamm's paraboloid. For the `curved-time' metric, devoid of any spatial curvature, geodesic orbits have the same apsides as in Schwarzschild space-time. We focus on null geodesics in particular. For the limit of light grazing the sun, asymptotic `spatial bending' and `time bending' become essentially equal, adding up to the total light deflection of 1.75 arc-seconds predicted by general relativity. However, for a much closer approach of the periastron to $r_S$, `time bending' largely exceeds `spatial bending' of light, while their sum remains substantially below that of Schwarzschild space-time.
description: 14 pages, 19 figures
CIGALE: a python Code Investigating GALaxy Emission
Creators: name: Boquien, M.
name: Burgarella, D.
name: Roehlly, Y.
name: Buat, V.
name: Ciesla, L.
name: Corre, D.
name: Inoue, A. K.
name: Salas, H.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context. Measuring how the physical properties of galaxies change across cosmic times is essential to understand galaxy formation and evolution. With the advent of numerous ground-based and space-borne instruments launched over the past few decades we now have exquisite multi-wavelength observations of galaxies from the FUV to the radio domain. To tap into this mine of data and obtain new insight into the formation and evolution of galaxies, it is essential that we are able to extract information from their SED. Aims. We present a completely new implementation of CIGALE. Written in python, its main aims are to easily and efficiently model the FUV to radio spectrum of galaxies and estimate their physical properties such as star formation rate, attenuation, dust luminosity, stellar mass, and many other physical quantities. Methods. To compute the spectral models, CIGALE builds composite stellar populations from simple stellar populations combined with highly flexible star formation histories, calculates the emission from gas ionised by massive stars, and attenuates both the stars and the ionised gas with a highly flexible attenuation curve. Based on an energy balance principle, the absorbed energy is then re-emitted by the dust in the mid- and far-infrared domains while thermal and non-thermal components are also included, extending the spectrum far into the radio range. A large grid of models is then fitted to the data and the physical properties are estimated through the analysis of the likelihood distribution. Results. CIGALE is a versatile and easy-to-use tool that makes full use of the architecture of multi-core computers, building grids of millions of models and analysing samples of thousands of galaxies, both at high speed. Beyond fitting the SEDs of galaxies and parameter estimations, it can also be used as a model-generation tool or serve as a library to build new applications.
description: 34 pages, 14 figures. Accepted for publication in A&A. The code is freely available at https://cigale.lam.fr . Comments welcome
Perturbation-based FEC-assisted Iterative Nonlinearity Compensation for WDM Systems
Creators: name: da Silva, Edson P.
name: Yankov, Metodi P.
name: Da Ros, Francesco
name: Morioka, Toshio
name: Oxenløwe, Leif K.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A perturbation-based nonlinear compensation scheme assisted by a feedback from the forward error correction (FEC) decoder is numerically and experimentally investigated. It is shown by numerical simulations and transmission experiments that a feedback from the FEC decoder enables improved compensation performance, allowing the receiver to operate very close to the full data-aided performance bounds. The experimental analysis considers the dispersion uncompensated transmission of a 5 x 32 GBd WDM system with DP-16QAM and DP-64QAM after 4200 km and 1120 km, respectively. The experimental results show that the proposed scheme outperforms single-channel digital backpropagation. A perturbation-based nonlinear compensation scheme assisted by a feedback from the forward error correction (FEC) decoder is numerically and experimentally investigated. It is shown by numerical simulations and transmission experiments that a feedback from the FEC decoder enables improved compensation performance, allowing the receiver to operate very close to the full data-aided performance bounds. The experimental analysis considers the dispersion uncompensated transmission of a 5 x 32 GBd WDM system with DP-16QAM and DP-64QAM after 4200 km and 1120 km, respectively. The experimental results show that the proposed scheme outperforms single-channel digital backpropagation.
On the scalability of parametric down-conversion for generating higher-order Fock states
Creators: name: Tiedau, Johannes
name: Bartley, Tim J.
name: Harder, Georg
name: Lita, Adriana E.
name: Nam, Sae Woo
name: Gerrits, Thomas
name: Silberhorn, Christine
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Spontaneous parametric down-conversion (SPDC) is the most widely-used method to generate higher-order Fock states ($n\geq 2$). Yet, a consistent performance analysis from fundamental principles is missing. Here we address this problem by introducing a framework for state fidelity and generation probability under the consideration of losses and multimode emission. With this analysis we show the fundamental limitations of this process as well as a trade-off between state fidelity and generation rate intrinsic to the probabilistic nature of the process. This identifies the parameter space for which SPDC is useful when generating higher-order Fock states for quantum applications. We experimentally investigate the strong pump regime of SPDC and demonstrate heralded Fock states up to $\lvert n\rangle =4$.
Nugonioneura Tillyard 1937
Creators: name: Aristov, D. S.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Protorthoptera
Nugonioneuridae
Nugonioneura

description: Genus Nugonioneura Tillyard, 1937
 Nugonioneura Tillyard, 1937: 92; Carpenter, 1976: 337; 1992: 337; Béthoux et al., 2003:
278.
 Type species: Nugonioneura problematica Tillyard, 1937, by original designation.
DIAGNOSIS. As for family because of monotypy.
SPECIES INCLUDED. Type species only.
description: Published as part of Aristov, D. S., 2020, Revision of the genera Heteroptilon, Nugonioneura and Opistocladus from the Lower Permian of USA (Insecta: Cnemidolestida: Tillyardembiidae, Nugonioneuridae and Parmapteridae), pp. 1-9 in Far Eastern Entomologist 401 on page 5, DOI: 10.25221/fee.401.1, http://zenodo.org/record/7165429
Additional file of Generation of tumor-initiating cells by exogenous delivery of OCT4transcription factor
Creators: name: Beltran, Adriana S
name: Rivenbark, Ashley G
name: Richardson, Bryan T
name: Xinni Yuan
name: Haili Quian
name: Hunt, John P
name: Zimmerman, Eric
name: Graves, Lee M
name: Blancafort, Pilar
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file of Generation of tumor-initiating cells by exogenous delivery of OCT4transcription factor
Effective spacetime and Hawking radiation from moving domain wall in thin film of 3He-A
Creators: name: Jacobson, T. A.
name: Volovik, G. E.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Condensed Matter (cond-mat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An event horizon for "relativistic" fermionic quasiparticles can be constructed in a thin film of superfluid 3He-A. The quasiparticles see an effective "gravitational" field which is induced by a topological soliton of the order parameter. Within the soliton the "speed of light" crosses zero and changes sign. When the soliton moves, two planar event horizons (black hole and white hole) appear, with a curvature singularity between them. Aside from the singularity, the effective spacetime is incomplete at future and past boundaries, but the quasiparticles cannot escape there because the nonrelativistic corrections become important as the blueshift grows, yielding "superluminal" trajectories. The question of Hawking radiation from the moving soliton is discussed but not resolved.
description: revtex file, 4 pages, 2 figures, submitted to JETP Lett
Spin-Reversal Transition in Ising Model under Pulsed Field
Creators: name: Misra, A.
name: Chakrabarti, B. K.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: In this communication we report the existence of a dynamic ``spin-reversal'' transition in an Ising system perturbed by a pulsed external magnetic field. The transition is achieved by tuning the strength ($h_p$) and/or the duration ($Δt$) of the pulse which is applied in a direction opposite to the existing order. We have studied this transition in the kinetic Ising Model in two dimension using Monte Carlo technique, and solved numerically the mean field equation of motion. The transition is essentially dynamic in nature and it takes the system from one ordered equilibrium phase to another by means of the growth of opposite spin domains (in the kinetic Ising case) induced during the period when the pulsed field is applied.
description: 19 pages, Latex, 6 eps figures, to appear in Physica A Subject-Class: Statistical Physics
Supergravity Solutions for BI Dyons
Creators: name: Youm, Donam
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct partially localized supergravity counterpart solutions to the 1/2 supersymmetric non-threshold and the 1/4 supersymmetric threshold bound state BI dyons in the D3-brane Dirac-Born-Infeld theory. Such supergravity solutions have all the parameters of the BI dyons. By applying the IIA/IIB T-duality transformations to these supergravity solutions, we obtain the supergravity counterpart solutions to 1/2 and 1/4 supersymmetric BIons carrying electric and magnetic charges of the worldvolume U(1) gauge field in the Dirac-Born-Infeld theory in other dimensions.
description: 17 pages, REVTeX, revised version to appear in Phys. Rev. D
Kimura et al 2019 PLOS Pathog.pdf
Creators: name: Taishi Kimura
name: Flynn, Claudia T.
name: Alirezaei, Mehrdad
name: Ganes C. Sen
name: J. Lindsay Whitton
Publisher: name: Health Research Alliance
Year: 2019
Subjects: subject: Immunology
subject: FOS: Clinical medicine
subject: 60506 Virology
subject: FOS: Biological sciences
subject: 110201 Cardiology (incl. Cardiovascular Diseases)

description: This file is a copy of the already published paper.
Nonlinear localized waves in a periodic medium
Creators: name: Sukhorukov, Andrey A.
name: Kivshar, Yuri S.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Condensed Matter (cond-mat)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We analyze the existence and stability of nonlinear localized waves in a periodic medium described by the Kronig-Penney model with a nonlinear defect. We demonstrate the existence of a novel type of stable nonlinear band-gap localized states, and also reveal an important physical mechanism of the oscillatory wave instabilities associated with the band-gap resonances.
description: 4 pages, 5 figures
Graded polynomial identities as identities of universal algebras
Creators: name: Bahturin, Yuri
name: Yasumura, Felipe
Publisher: name: arXiv
Year: 2018
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17A42, 08B20, 16R50

description: Let $A$ and $B$ be finite-dimensional simple algebras with arbitrary signature over an algebraically closed field. Suppose $A$ and $B$ are graded by a semigroup $S$ so that the graded identitical relations of $A$ are the same as those of $B$. Then $A$ is isomorphic to $B$ as an $S$-graded algebra.
Higher su(N) tensor products
Creators: name: Rasmussen, J.
name: Walton, M. A.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We extend our recent results on ordinary su(N) tensor product multiplicities to higher su(N) tensor products. Particular emphasis is put on four-point couplings where the tensor product of four highest weight modules is considered. The number of times the singlet occurs in the decomposition is the associated multiplicity. In this framework, ordinary tensor products correspond to three-point couplings. As in that case, the four-point multiplicity may be expressed explicitly as a multiple sum measuring the discretised volume of a convex polytope. This description extends to higher-point couplings as well. We also address the problem of determining when a higher-point coupling exists, i.e., when the associated multiplicity is non-vanishing. The solution is a set of inequalities in the Dynkin labels.
description: 17 pages, LaTeX
Terahertz oscilloscope for recording time information of ultrashort electron beams
Creators: name: Zhao, Lingrong
name: Wang, Zhe
name: Tang, Heng
name: Wang, Rui
name: Cheng, Yun
name: Lu, Chao
name: Jiang, Tao
name: Zhu, Pengfei
name: Hu, Long
name: Song, Wei
name: Wang, Huida
name: Qiu, Jiaqi
name: Kostin, Roman
name: Jing, Chunguang
name: Antipov, Sergey
name: Wang, Peng
name: Qi, Jia
name: Cheng, Ya
name: Xiang, Dao
name: Zhang, Jie
Publisher: name: arXiv
Year: 2019
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Applied Physics (physics.app-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: We propose and demonstrate a Terahertz (THz) oscilloscope for recording time information of an ultrashort electron beam. By injecting a laser-driven THz pulse with circular polarization into a dielectric tube, the electron beam is swept helically such that the time information is uniformly encoded into the angular distribution that allows one to characterize both the temporal profile and timing jitter of an electron beam. The dynamic range of the measurement in such a configuration is significantly increased compared to deflection with a linearly polarized THz pulse. With this THz oscilloscope, nearly 50-fold longitudinal compression of a relativistic electron beam to about 15 fs (rms) is directly visualized with its arrival time determined with 3 fs accuracy. This technique bridges the gap between streaking of photoelectrons with optical lasers and deflection of relativistic electron beams with radio-frequency deflectors, and should have wide applications in many ultrashort electron beam based facilities.
description: submitted to PRL
Flux unwinding in the lattice Schwinger model
Creators: name: Nagele, Chris
name: Cejudo, J. Eduardo
name: Byrnes, Tim
name: Kleban, Matthew
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the dynamics of the massive Schwinger model on a lattice using exact diagonalization. When periodic boundary conditions are imposed, analytic arguments indicate that a non-zero electric flux in the initial state can "unwind" and decrease to a minimum value equal to minus its initial value, due to the effects of a pair of charges that repeatedly traverse the spatial circle. Our numerical results support the existence of this flux unwinding phenomenon, both for initial states containing a charged pair inserted by hand, and when the charges are produced by Schwinger pair production. We also study boundary conditions where charges are confined to an interval and flux unwinding cannot occur, and the massless limit, where our results agree with the predictions of the bosonized description of the Schwinger model.
description: 8 pages, 7 figures
String dynamics near a Kaluza-Klein black hole
Creators: name: Jassal, H. K.
name: Mukherjee, A.
name: Saxena, R. P.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The dynamics of a string near a Kaluza-Klein black hole are studied. Solutions to the classical string equations of motion are obtained using the world sheet velocity of light as an expansion parameter. The electrically and magnetically charged cases are considered separately. Solutions for string coordinates are obtained in terms of the world-sheet coordinate $τ$. It is shown that the Kaluza-Klein radius increases/decreases with $τ$ for electrically/magnetically charged black hole.
description: Latex2e file with six postscript figures. Minor changes, more accurate numerical results and updated references
Stepping stones into the desert: an experimental test of hybridization-facilitated range expansion in spadefoot toads
Creators: name: Ryan, Sedona Rain
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2024

description: Hybridization between species often results in low-fitness offspring due to genetic incompatibilities, the likelihood of which increases with genetic distance between parents. Consequently, less genetically differentiated species are more likely to exchange genes via hybridization, whereas more genetically differentiated species should be unable. However, under the stepping stone model, hybridization with less genetically differentiated species may contribute to gene exchange in such a way that it reduces genetic incompatibilities with more genetically differentiated species, acting as a stepping stone for hybridization. To test this, we conducted a controlled breeding experiment between allopatric Spea bombifrons and two clades of Spea multiplicata to investigate differential hybridization consequences on hybrid fitness as expected by the “stepping stone” model. As predicted, hybrid offspring sired by northern S. multiplicata had higher fitness than those sired by southern S. multiplicata. Hybridization with northern S. multiplicata may have facilitated later hybridization with southern S. multiplicata.
Big Entropy Fluctuations in Statistical Equilibrium: The Macroscopic Kinetics
Creators: name: Chirikov, B. V.
name: Zhirov, O. V.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Large entropy fluctuations in an equilibrium steady state of classical mechanics were studied in extensive numerical experiments on a simple 2--freedom strongly chaotic Hamiltonian model described by the modified Arnold cat map. The rise and fall of a large separated fluctuation was shown to be described by the (regular and stable) "macroscopic" kinetics both fast (ballistic) and slow (diffusive). We abandoned a vague problem of "appropriate" initial conditions by observing (in a long run)spontaneous birth and death of arbitrarily big fluctuations for any initial state of our dynamical model. Statistics of the infinite chain of fluctuations, reminiscent to the Poincaré recurrences, was shown to be Poissonian. A simple empirical relation for the mean period between the fluctuations (Poincaré "cycle") has been found and confirmed in numerical experiments. A new representation of the entropy via the variance of only a few trajectories ("particles") is proposed which greatly facilitates the computation, being at the same time fairly accurate for big fluctuations. The relation of our results to a long standing debates over statistical "irreversibility" and the "time arrow" is briefly discussed too.
description: Latex 2.09, 26 pages, 6 figures
Three Dimensional Numerical General Relativistic Hydrodynamics I: Formulations, Methods, and Code Tests
Creators: name: Font, J. A.
name: Miller, M.
name: Suen, W.
name: Tobias, M.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This is the first in a series of papers on the construction and validation of a three-dimensional code for general relativistic hydrodynamics, and its application to general relativistic astrophysics. This paper studies the consistency and convergence of our general relativistic hydrodynamic treatment and its coupling to the spacetime evolutions described by the full set of Einstein equations with a perfect fluid source. The numerical treatment of the general relativistic hydrodynamic equations is based on high resolution shock capturing schemes. These schemes rely on the characteristic information of the system. A spectral decomposition for general relativistic hydrodynamics suitable for a general spacetime metric is presented. Evolutions based on three different approximate Riemann solvers coupled to four different discretizations of the Einstein equations are studied and compared. The coupling between the hydrodynamics and the spacetime (the right and left hand side of the Einstein equations) is carried out in a treatment which is second order accurate in {\it both} space and time. Convergence tests for all twelve combinations with a variety of test beds are studied, showing consistency with the differential equations and correct convergence properties. The test-beds examined include shocktubes, Friedmann-Robertson-Walker cosmology tests, evolutions of self-gravitating compact (TOV) stars, and evolutions of relativistically boosted TOV stars. Special attention is paid to the numerical evolution of strongly gravitating objects, e.g., neutron stars, in the full theory of general relativity, including a simple, yet effective treatment for the surface region of the star (where the rest mass density is abruptly dropping to zero).
description: 45 pages RevTeX, 34 figures
Charge correlations and optical conductivity in weakly doped antiferromagnets
Creators: name: Vojta, Matthias
name: Becker, Klaus W.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the dynamical charge-charge correlation function and the optical conductivity in weakly doped antiferromagnets using Mori-Zwanzig projection technique. The system is described by the two-dimensional t-J model. The arising matrix elements are evaluated within a cumulant formalism which was recently applied to investigate magnetic properties of weakly doped antiferromagnets. Within the present approach the ground state consists of non-interacting hole quasiparticles. Our spectra agree well with numerical results calculated via exact diagonalization techniques. The method we employ enables us to explain the features present in the correlation functions. We conclude that the charge dynamics at weak doping is governed by transitions between excited states of spin-bag quasiparticles.
description: 5 pages, 2 figures, to appear in Europhys. Letters
Liaromorpha Gorochov 1994
Creators: name: Gorochov, A. V.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Tettigoniidae
Liaromorpha

description: Genus Liaromorpha Gorochov, 1994
 Type species: Liaromorpha buonluoiensis Gorochov, 1994, by original designation.
description: Published as part of Gorochov, A. V., 2020, Taxonomy of the katydids (Orthoptera: Tettigoniidae) from East Asia and adjacent islands. Communication 13, pp. 1-36 in Far Eastern Entomologist 400 on page 3, DOI: 10.25221/fee.400.1, http://zenodo.org/record/7165406
Nonsingular Dilaton Cosmology in the String Frame
Creators: name: Easson, Damien A.
name: Brandenberger, Robert H.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the theory obtained by adding to the usual string frame dilaton gravity action specially constructed higher derivative terms motivated by the limited curvature construction of [MukhanovET1992a] and determine the spatially homogeneous and isotropic solutions to the resulting equations of motion. All solutions of the resulting theory of gravity with these symmetries are nonsingular and all curvature invariants are bounded. For initial conditions inspired by the pre-big-bang scenario solutions exist which correspond to a spatially flat Universe starting in a dilaton-dominated superinflationary phase with ${\dot H} > 0$ and having a smooth transition to an expanding Friedmann Universe with ${\dot H} < 0$. Hence, the graceful exit problem of pre-big-bang cosmology is solved in a natural way.
description: 8 pages, 3 figures, LaTex; minor changes; published in JHEP 9909:003, 1999
Additional file 1: of Enterococcus faecium NCIMB 10415 administration improves the intestinal health and immunity in neonatal piglets infected by enterotoxigenic Escherichia coli K88
Creators: name: Peng, Xie
name: Wang, Ru
name: Hu, Liang
name: Zhou, Qiang
name: Liu, Yang
name: Yang, Min
name: Fang, Zhengfeng
name: Lin, Yan
name: Xu, Shengyu
name: Feng, Bin
name: Li, Jian
name: Jiang, Xuemei
name: Zhuo, Yong
name: Li, Hua
name: Wu, De
name: Che, Lianqiang
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences

description: Table S1. Effect of E. faecium on alpha diversity of microbial community in colonic content of piglets challenged with ETEC K88. Table S2. Effect of E. faecium on the relative abundance for the top 30 most abundant genera in the colon of piglets challenged with ETEC K88. Table S3. Effect of E. faecium on short chain fatty acid concentrations of piglets challenged with ETEC K88. Figure S1. The experimental design of the different treatments and procedures. Figure S2. Comparison of the gut microbiota composition among four groups. Principal coordinate analysis to visualize the unweighted UniFrac distances of colon digesta samples from individual piglet. (DOCX 137 kb)
Dynamic interfacial polaron enhanced superconductivity of FeSe/SrTiO3
Creators: name: Zhang, Shuyuan
name: Wei, Tong
name: Guan, Jiaqi
name: Zhu, Qing
name: Qin, Wei
name: Wang, Weihua
name: Zhang, Jiandi
name: Plummer, E. W.
name: Zhu, Xuetao
name: Zhang, Zhenyu
name: Guo, Jiandong
Publisher: name: arXiv
Year: 2018
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The observation of substantially enhanced superconductivity of single-layer FeSe films on SrTiO3 has stimulated intensive research interest. At present, conclusive experimental data on the corresponding electron-boson interaction is still missing. Here we use inelastic electron scattering spectroscopy and angle resolved photoemission spectroscopy to show that the electrons in these systems are dressed by the strongly polarized lattice distortions of the SrTiO3, and the indispensable non-adiabatic nature of such a coupling leads to the formation of dynamic interfacial polarons. Furthermore, the collective motion of the polarons results in a polaronic plasmon mode, which is unambiguously correlated with the surface phonons of SrTiO3 in the presence of the FeSe films. A microscopic model is developed showing that the interfacial polaron-polaron interaction leads to the superconductivity enhancement.
description: 13 pages, 3 figures
Analytic degree distributions of horizontal visibility graphs mapped from unrelated random series and multifractal binomial measures
Creators: name: Xie, Wen-Jie
name: Han, Rui-Qi
name: Jiang, Zhi-Qiang
name: Wei, Lijian
name: Zhou, Wei-Xing
Publisher: name: arXiv
Year: 2019
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Complex network is not only a powerful tool for the analysis of complex system, but also a promising way to analyze time series. The algorithm of horizontal visibility graph (HVG) maps time series into graphs, whose degree distributions are numerically and analytically investigated for certain time series. We derive the degree distributions of HVGs through an iterative construction process of HVGs. The degree distributions of the HVG and the directed HVG for random series are derived to be exponential, which confirms the analytical results from other methods. We also obtained the analytical expressions of degree distributions of HVGs and in-degree and out-degree distributions of directed HVGs transformed from multifractal binomial measures, which agree excellently with numerical simulations.
description: 7 pages, 4 figures
LSST Target-of-Opportunity Observations of Gravitational Wave Events: Essential and Efficient
Creators: name: Cowperthwaite, P. S.
name: Villar, V. A.
name: Scolnic, D. M.
name: Berger, E.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present simulated observations to assess the ability of LSST and the WFD survey to detect and characterize kilonovae - the optical emission associated with binary neutron star (and possibly black hole - neutron star) mergers. We expand on previous studies in several critical ways by exploring a range of kilonova models and several choices of cadence, as well as by evaluating the information content of the resulting light curves. We find that, depending on the precise choice of cadence, the WFD survey will achieve an average kilonova detection efficiency of $\approx 1.6-2.5\%$ and detect only $\approx 3-6$ kilonovae per year. The detected kilonovae will be within the detection volume of Advanced LIGO/Virgo (ALV). By refitting the best resulting LSST light curves with the same model used to generate them we find the model parameters are generally weakly constrained, and are accurate to at best a factor of $2-3$. Motivated by the finding that the WFD will yield a small number of kilonova detections, with poor light curves and marginal information content, and that the detections are in any case inside the ALV volume, we argue that target-of-opportunity follow-up of gravitational wave triggers is a much more effective approach for kilonova studies. We outline the qualitative foundation for such a program with the goal of minimizing the impact on LSST operations. We argue that observations in the $gz$-bands with a total time investment per event of $\approx 1.5$ hour per 10 deg$^2$ of search area is sufficient to rapidly detect and identify kilonovae with $\gtrsim 90\%$ efficiency. For an estimated event rate of $\sim20$ per year visible to LSST, this accounts for $\sim1.5\%$ of the total survey time. In this regime, LSST has the potential to be a powerful tool for kilonovae discovery, with detected events handed off to other narrow-field facilities for further monitoring.
description: 17 Pages, 11 Figures, 1 Table; Submitted to ApJ
Shifting Sovereignties: Sovereignty Production across the New Fuzhou Settler-Colonial Environment in Sarawak in the Early Twentieth Century (1901-1935)
Creators: name: Janson, Ivy
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2024

description: This thesis examines the Indigenous Iban and the New Fuzhou settlers of the Lower Rejang Valley in Sarawak, presently Malaysia, at the turn of the twentieth century through the lens of Silverstein’s theory of sovereignty production. Specifically, this thesis examines the ways in which sovereignty production methods changed from 1901 to 1935. The Iban lost access to their traditional forms of sovereignty production through nomadic rice cultivation due to government policy and economic incentives, but maintained a distinct identity through rubber profits and the perpetuation of oral genealogies. Meanwhile, the New Fuzhou settlers originally sought to reproduce the Southern Chinese agrarian countryside supplemented by liberal Christian values, but ecological conditions and a new American Missionary leader resulted in a new Christian-Capitalist sovereignty expressed through cash crop production and joint-stock corporations. Sovereignty production and how it changes helps recognize non-traditional expressions of agency among all groups present in settler-colonial environments.
Surface Hopping Dynamics Including Intersystem Crossing using the Algebraic Diagrammatic Construction Method
Creators: name: Mai, Sebastian
name: Plasser, Felix
name: Pabst, Mathias
name: Neese, Frank
name: Köhn, Andreas
name: González, Leticia
Publisher: name: arXiv
Year: 2019
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We report an implementation for employing the algebraic diagrammatic construction to second order [ADC(2)] ab initio electronic structure level of theory in nonadiabatic dynamics simulations in the framework of the SHARC (surface hopping including arbitrary couplings) dynamics method. The implementation is intended to enable computationally efficient, reliable, and easy-to-use nonadiabatic dynamics simulations of intersystem crossing in organic molecules. The methodology is evaluated for the 2-thiouracil molecule. It is shown that ADC(2) yields reliable excited-state energies, wave functions, and spin-orbit coupling terms for this molecule. Dynamics simulations are compared to previously reported results using high-level multi-state complete active space perturbation theory, showing favorable agreement.
description: 30 pages, 5 figures, 2 tables
Jordan manifolds and dispersionless KdV equations
Creators: name: Strachan, Ian A. B.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Multicomponent KdV-systems are defined in terms of a set of structure constants and, as shown by Svinolupov, if these define a Jordan algebra the corresponding equations may be said to be integrable, at least in the sense of having higher-order symmetries, recursion operators and hierarchies of conservation laws. In this paper the dispersionless limits of these Jordan KdV equations are studied, under the assumptions that the Jordan algebra has a unity element and a compatible non-degenerate inner product. Much of this structure may be encoded in a so-called Jordan manifold, akin to a Frobenius manifold. In particular the Hamiltonian properties of these systems are investigated.
Antibióticos, probióticos y prebióticos
Creators: name: Luna Pérez, Estephanie Elizabeth
Publisher: name: Benemérita Universidad Autónoma de Puebla
Year: 2024
Subjects: Antibióticos
probióticos
prebióticos
microbiota
microbioma

description: Resumen

Algunas palabras con prefijos o sufijos iguales pueden llegar a confundirse, tal es el caso de las palabras antibiótico, probiótico y prebiótico, que, aunque son muy similares hay gran diferencia en el significado de cada una. Un antibiótico es un compuesto cuya función es erradicar o limitar el crecimiento bacteriano, es por ello que son usados para tratar infecciones causadas por bacterias patógenas [1]. Por otro lado, un probiótico se puede definir como un microorganismo que al consumirse en una cantidad adecuada causa un efecto benéfico en el huésped [2], algunos de estos beneficios son: Inhibición de patógenos en tracto gastrointestinal, síntesis de vitaminas (K y del complejo B), mantenimiento de integridad del epitelio intestinal, ayuda al metabolismo de la lactosa, modulación el sistema inmunológico, entre otros [3, 4]. Finalmente, el término “prebiótico” se refiere a los compuestos alimentarios no digeribles necesarios para mantener una composición adecuada de la microbiota intestinal, esto se logra al promover el crecimiento de bacterias que son benéficas para el huésped [5].

Como se mencionó anteriormente los antibióticos son necesarios para erradicar infecciones causadas por bacterias patógenas,  pero al ingerirlos también se eliminan bacterias que dan beneficios al huésped, por ello se ha demostrado que es necesario acompañar con probióticos los tratamientos a base de antibióticos, esto debido a que se ha comprobado que se reducen los efectos secundarios causados por este tipo de tratamientos como lo es la diarrea [6].

Mantener la integridad de la microbiota intestinal es necesario para una buena salud, ya que los 100 billones de microorganismos intestinales tienen influencia en tres principales funciones, las cuales son: mantenimiento del sistema nervioso entérico, estimulación del sistema inmunológico y modulación del sistema endocrino. Para preservar esta microbiota es necesario mantener una buena dieta, actividad física, evitar alimentos industrializados y consumir en cantidades adecuadas probióticos y prebióticos [7].
ENHANCING CHILDHOOD OBESITY PREVENTION THROUGH SLEEP EDUCATION AND INTERACTION: A COMPREHENSIVE REVIEW
Creators: name: Maria, Papadopoulos
name: Ioannis, Anastasia
Publisher: name: kEITH jOURNAL
Year: 2025
Subjects: childhood obesity, sleep problems, sleep duration, sleep timing, hormones, appetite regulation

description: Childhood obesity and sleep problems are two major public health issues. There is a growing body of evidence to suggest that these two problems are linked.

Short sleep duration has been associated with an increased risk of childhood obesity. This is thought to be due to a number of factors, including hormonal changes that affect appetite regulation, increased calorie intake, and decreased physical activity.

Sleep timing patterns may also play a role in childhood obesity risk. For example, children who go to bed late and wake up late are more likely to be obese than children who go to bed early and wake up early. The relationship between childhood obesity and sleep problems is complex and not fully understood. However, the evidence suggests that these two problems are interconnected and that addressing sleep problems may be an important strategy for preventing childhood obesity.
การสังเคราะห์อนุภาคนาโนเหล็กเชิงประกอบสารสกัดเปลือกมังคุดโดยวิธีสะอาดเพื่อใช้ในการก้าจัดสีย้อมเมทิลีนบลูในสารละลายน้า
Creators: name: พิชญ์สินี สมชัยดี, การะเกด เทศศรี
Publisher: name: กองบริหารการวิจัย
Year: 2562
Subjects: อนุภาคนาโนเหล็ก
สารสกัดเปลือกมังคุด
การสังเคราะห์โดยวิธีสะอาด
สีย้อมเมทิลีนบลู

description: วารสารวิทยาศาสตร์และเทคโนโลยี, 27, 5, 777-791
title: Wissenstheoretische Probleme der Seuchengeschichte
Creators: name: Karafyllis, Nicole
Publisher: name: Cuvillier
Year: 2022
Subjects: subject: Jahrbuch der BWG
subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: 610.9
subject: 10

description: Jahrbuch der Braunschweigischen Wissenschaftlichen Gesellschaft, vol. 2021Jahrbuch 2021 der Braunschweigischen Wissenschaftlichen Gesellschaft, vol. 2021, p. 182
HARAKATLI O'YINLARNING VUJUDGA KELISHI VA RIVOJLANISHI
Creators: name: Dadajonov, Otajon
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada xalq o‘yinlari, an’analari va marosimlari uzoq tarixiy taraqqiyot davomida xalqning moddiy, madaniy-ma’naviy talab- ehtiyojlari asosida vujudga kelganligi va har bir davr xususiyatiga qarab modernizatsiyalashib, mazmunan boyib transformatsiyalashuv jarayonlari yoritib berilgan.
ผลของตัวเร่งปฏิกิริยาซีโอไลต์ชนิด FAU BEA และ MFIต่อการแตกตัวเชิงเร่งปฏิกิริยาของอะคริลิก
Creators: name: สุภาภรณ์ คางคา, สมโภช ภู่พีระสุพงษ์,สมศักดิ์ ดารงค์เลิศ
Publisher: name: กองบริหารการวิจัย
Year: 2562
Subjects: การแตกตัวเชิงเร่งปฏิกิริยา
ซีโอไลต์
ตัวเร่งปฏิกิริยา
อะคริลิก

description: วารสารวิทยาศาสตร์และเทคโนโลยี, 27, 5, 792-806
On closed finite gap curves in spaceforms II
Creators: name: Klein, Sebastian
name: Kilian, Martin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 53A04, 37K10, 30D15, 46E35, 22E46

description: We prove that the set of closed finite gap curves in hyperbolic 3-space $\mathbb{H}^3$ is $W^{2,2}$-dense in the Sobolev space of all closed $W^{2,2}$-curves in $\mathbb{H}^3$. We also show that the set of closed finite gap curves in any 2-dimensional space form $\mathbb{E}^2$ is $W^{2,2}$-dense in the Sobolev space of all closed $W^{2,2}$-curves in $\mathbb{E}^2$.
description: 21 pages
แบบจาลองการใช้ที่ดินรอบศูนย์กลางการศึกษาจากภาพถ่ายทางอากาศสีเชิงเลข
Creators: name: อริศรา เจริญปัญญาเนตร, ชนิดา สุวรรณประสิทธิ์
Publisher: name: กองบริหารการวิจัย
Year: 2562
Subjects: แบบจาลองการใช้ที่ดิน
ศูนย์กลางการศึกษา
ภาพถ่ายทางอากาศสีเชิงเลข
ระบบสารสนเทศภูมิศาสตร์

description: วารสารวิทยาศาสตร์และเทคโนโลยี, 27, 5, 807-822