cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Electromagnetic signatures of thin accretion disks in wormhole geometries
Creators: name: Harko, Tiberiu
name: Kovács, Zoltán
name: Lobo, Francisco S. N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we study the physical properties and characteristics of matter forming thin accretion disks in static and spherically symmetric wormhole spacetimes. In particular, the time averaged energy flux, the disk temperature and the emission spectra of the accretion disks are obtained for these exotic geometries, and are compared with the Schwarzschild solution. It is shown that more energy is emitted from the disk in a wormhole geometry than in the case of the Schwarzschild potential and the conversion efficiency of the accreted mass into radiation is more than a factor of two higher for the wormholes than for static black holes. These effects in the disk radiation are confirmed in the radial profiles of temperature corresponding to the flux distributions, and in the emission spectrum ωL(ω) of the accretion disks. We conclude that specific signatures appear in the electromagnetic spectrum, thus leading to the possibility of distinguishing wormhole geometries by using astrophysical observations of the emission spectra from accretion disks.
description: 7 pages, 10 figures. V2: minor changes, references added
Additional file 1 of Barriers and facilitators to the implementation of social robots for older adults and people with dementia: a scoping review protocol
Creators: name: Koh, Wei Qi
name: Felding, Simone Anna
name: Toomey, Elaine
name: Casey, Dympna
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 1. Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) Checklist.
Attenuation Regulation as a Term Rewriting System
Creators: name: Asarin, Eugene
name: Cachat, Thierry
name: Seliverstov, Alexander
name: Touili, Tayssir
name: Lyubetsky, Vassily
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: The classical attenuation regulation of gene expression in bacteria is considered. We propose to represent the secondary RNA structure in the leader region of a gene or an operon by a term, and we give a probabilistic term rewriting system modeling the whole process of such a regulation.
description: to appear
A mortuary analysis of the Dawenkou Cemetery Site, Shandong, China
Creators: name: Kingscott, Anne Underhill
Publisher: name: University of British Columbia
Year: 2010

description: This study is concerned with the development of social ranking in Shandong province, China, and its environs, during the late Neolithic period. The Dawenkou cemetery has been considered by Chinese and western archaeologists as representing one of the earliest ranked societies in this region. There is some disagreement regarding the degree of status differentiation reflected by the mortuary remains at Dawenkou. Opinions vary as to whether the site shows incipient ranking, or a more fully developed system, or whether there was a hereditary ruling class. The primary goal of this study is to provide a greater understanding of the nature and degree of status differentiation represented at Dawenkou, by means of an in-depth mortuary analysis utilizing current archaeological methods. The methodology upon which this study is based is outlined in Chapter 2. Four analyses are included: an evaluation of the three relative chronological periods at the site (Chapter 3), an analysis to estimate the sex of unsexed burials on the basis of grave goods (Chapter 4), an exploratory assessment of social subgroup affiliation (Chapter 5), and the analysis of status differentiation (Chapter 6). I conclude that an increase through time in the degree of ranking is represented at the site. The Early period burials reflect elements of both an achieved and an ascribed (ranked) system of status differentiation. The Late period burials appear to reflect a highly developed ranked society. I propose that the Early period burials represent part of a social system in which members of a descent group were ranked. Also, the Late period burials represent members of a descent group that constitutes one status level in a regional status system. Mortuary analyses of other Dawenkou Culture sites roughly contemporaneous to the Early and Late periods at Dawenkou could reveal whether similar changes through time are apparent. It is likely that ranking first developed in the eastern seaboard region at an earlier date than previously considered. The secondary goal of this study is to make a methodological contribution to mortuary analysis. I argue that status may be symbolized by energy expenditure, grave goods, or both. Since the burials in a cemetery reflect more than one social system through time, an analysis of status should emphasize change through time. Finally, some of the techniques employed in this study should have utility for other mortuary analyses: the Simple Inspection Method to estimate sex (Chapter 4), and Ward's Method of cluster analysis and Torgerson's Metric Multidimensional Scaling for an analysis of status (Chapter 6), or for seriation (Chapter 3).
MPEC 2024-T21 : 2024 QJ29
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 QJ29

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Regesto degli spettacoli INDA al Teatro greco di Siracusa (1914-2021)
Creators: name: Pedersoli, Alessandra
Publisher: name: La Rivista di Engramma
Year: 2021
Subjects: Istituto Nazionale del Dramma Antico
Greek Theater
Staging of classical drama

description: From 1914 the Istituto Nazionale del Dramma Antico (INDA) presents the ancient classical dramas performed at the Greek Theater of Syracuse. Thanks to the activity of the INDA, for more than a century the Greek Theater of the Sicilian city has been a stage and an agora, a space for representation but also a space that hosts multiple ideas and contributions, related to the problem of the modern reading and reinvention of Greek tragedy. INDA, varying over the years the choice of dramas (established since 2000, with annual productions), interpretations, performers and staging styles, preserves and valorizes through its activity an inestimable heritage: the inheritance and the newness of classical drama. Presented here is the register of the plays staged from 1914 to 2021.
Ballistic-like Space-charge-limited Currents in Halide Perovskites at Room Temperature
Creators: name: Almora, Osbel
name: Miravet, Daniel
name: García-Batlle, Marisé
name: Garcia-Belmonte, Germà
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The emergence of halide perovskites in photovoltaics has diversified the research on this material family and extended their application towards several fields in the optoelectronics, such as photo- and ionizing-radiation-detectors. One of the most basic characterization protocols consist on measuring the dark current-voltage (J-V) curve of symmetrically contacted samples for identifying the different regimes of space-charge-limited current (SCLC). Customarily, J=C*V^n curves indicate the Mott-Gurney law when n=2, or the Child-Langmuir ballistic regime of SCLC when n=3/2. The latter can be often found in perovskite samples. In this work, we start by discussing the interpretation of currents proportional to V^(3/2) in relation to the masking effect of the dual electronic-ionic conductivity in halide perovskites. However, we do not discard the actual occurrence of SCLC transport with ballistic-like trends. For those cases, we introduce the models of: quasi-ballistic velocity-dependent dissipation (QvD) and the ballistic-like voltage-dependent mobility (BVM) regime of SCLC. The QvD model is shown to better describe electronic kinetics, whereas the BVM model is revealed as suitable for describing electronic or ionic kinetics in halide perovskites. The proposed formulations can be used as characterization tools for the evaluation of effective mobilities, charge carrier concentrations and times-of-flight from J-V curves and impedance spectroscopy spectra.
Additional file 2 of Barriers and facilitators to the implementation of social robots for older adults and people with dementia: a scoping review protocol
Creators: name: Koh, Wei Qi
name: Felding, Simone Anna
name: Toomey, Elaine
name: Casey, Dympna
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 2. Sample search strategy.
Proving Noninterference by a Fully Complete Translation to the Simply Typed lambda-calculus
Creators: name: Shikuma, Naokata
name: Igarashi, Atsushi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Programming Languages (cs.PL)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences
subject: D.3.1; F.3.2; F.3.3

description: Tse and Zdancewic have formalized the notion of noninterference for Abadi et al.'s DCC in terms of logical relations and given a proof of noninterference by reduction to parametricity of System F. Unfortunately, their proof contains errors in a key lemma that their translation from DCC to System F preserves the logical relations defined for both calculi. In fact, we have found a counterexample for it. In this article, instead of DCC, we prove noninterference for sealing calculus, a new variant of DCC, by reduction to the basic lemma of a logical relation for the simply typed lambda-calculus, using a fully complete translation to the simply typed lambda-calculus. Full completeness plays an important role in showing preservation of the two logical relations through the translation. Also, we investigate relationship among sealing calculus, DCC, and an extension of DCC by Tse and Zdancewic and show that the first and the last of the three are equivalent.
description: 31 pages
Additional file 3 of Barriers and facilitators to the implementation of social robots for older adults and people with dementia: a scoping review protocol
Creators: name: Koh, Wei Qi
name: Felding, Simone Anna
name: Toomey, Elaine
name: Casey, Dympna
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 3. Categorisation of social robots.
Analyzing Secure and Attested Communication in Mobile Devices
Creators: name: Ibrahim, Muhammad
Publisher: name: Purdue University Graduate School
Year: 2024
Subjects: classificationCode: 460603
subject: Cyberphysical systems and internet of things
classificationCode: 460608
subject: Mobile computing
classificationCode: 460406
subject: Software and application security
classificationCode: 460407
subject: System and network security

description: To assess the security of mobile devices, I begin by identifying the key entities involved in their operation: the user, the mobile device, and the service or device being accessed. Users rely on mobile devices to interact with services and perform essential tasks. These devices act as gateways, enabling communication between the user and the back-end services. For example, a user may access their bank account via a banking app on their mobile device, which communicates with the bank’s back-end server. In such scenarios, the server must authenticate the user to ensure only authorized individuals can access sensitive information. However, beyond user authentication, it is crucial for connected services and devices to verify the integrity of the mobile device itself. A compromised mobile device can have severe consequences for both the user and the services involved.My research focuses on examining the methods used by various entities to attest and verify the integrity of mobile devices. I conduct a comprehensive analysis of mobile device attestation from multiple perspectives. Specifically, I investigate how attestation is carried out by back-end servers of mobile apps, IoT devices controlled by mobile companion apps, and large language models (LLMs) accessed via mobile apps.In the first case, back-end servers of mobile apps must attest to the integrity of the device to protect against tampered apps and devices, which could lead to financial loss, data breaches, or intellectual property theft. For instance, a music streaming service must implement strong security measures to verify the device’s integrity before transmitting sensitive content to prevent data leakage or unauthorized access.In the second case, IoT devices must ensure they are communicating with legitimate companion apps running on attested mobile devices. Failure to enforce proper attestation for IoT companion apps can expose these devices to malicious attacks. An attacker could inject malicious code into an IoT device, potentially causing physical damage to the device or its surroundings, or even seizing control of the device, leading to critical safety risks, property damage, or harm to human lives.Finally, in the third case, malicious apps can exploit prompt injection attacks against LLMs, leading to data leaks or unauthorized access to APIs and services offered by the LLM. These scenarios underscore the importance of secure and attested communication between mobile devices and the services they interact with.
SO(10) Grand Unification with Minimal Dark Matter and Color Octet Scalars
Creators: name: Cho, Gi-Chol
name: Hayami, Kana
name: Okada, Nobuchika
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The minimal dark matter (MDM) scenario is a very simple framework of physics beyond the Standard Model (SM) to supplement the SM with a DM candidate. In this paper, we consider an ultraviolet completion of the scenario to an SO(10) grand unified theory, which is a well-motivated framework in light of the neutrino oscillation data. Considering various phenomenological constraints, such as the successful SM gauge coupling unification, the proton stability, and the direct/indirect DM detection constraints as well as the absolute electroweak vacuum stability, we have first singled out the minimal particle content of the MDM scenario at low energies. In addition to the SM particle content, our MDM scenario includes an SU(2)$_L$ quintet scalar DM with a 9.4 TeV mass and three degenerate color-octet scalars with mass of 2 TeV. We then have found a way to embed the minimal particle content into SO(10) representations, in which a remnant $Z_2$ symmetry after the SO(10) symmetry breaking ensures the stability of the DM particle. The production cross section of the color-octet scalars at the Large Hadron Collider is found to be a few orders of magnitude below the current experimental bound.
description: 19 pages, 2 figures
Seismic performance prediction of steel structures using multiple intensity measures
Creators: name: Baldava, Sridhar
Publisher: name: The University of Texas at Austin
Year: 2004
Subjects: Ground motion parameter
Structural response
Seismic performance

description: The prediction of performance of structures in seismically active regions has been traditionally based on a single scalar ground motion parameter (GMP) or intensity measure (IM). However, it is widely accepted that the performance of a structure subject to ground shaking is probably dependent on more than a single parameter. Therefore, performance predictions based on a scalar ground motion parameter are subject to a great deal of variability, which in turn requires greater effort to obtain results with a reasonable level of confidence. It is expected that by including more information about the ground motion in our set of predictors we might be able to predict structural performance with smaller variability, or equivalently, require less effort to predict performance with the same level of confidence. The objective of this study is to investigate whether vector combinations of IMs might correlate better with structural performance than use of any parameter singly. A total of 140 recorded ground motions are considered in this study. These motions include a "near-source" set of 70 motions recorded at distances less than 16 km from the source as well as an "ordinary set" of 70 motions recorded at distances greater than 16 km. Results of nonlinear dynamic analyses of 3-, 9-, and 20-story steel moment-resisting frame buildings designed by practicing engineers for the Los Angeles region as part of the SAC steel project, subjected to the selected ground motion records, will be used to evaluate the predictive power of alternative vector-valued IM sets. Because knowledge of more than a single structural performance measure can help reduce uncertainty in predicting losses and damage levels, vectors of such performance measures (e.g., various drift ratios) resulting from dynamic analyses with the selected ground motions will be studied for their dependence on the selected GMPs. The degree of correlation between the alternative vector GMP sets and the structural performance vectors will be evaluated via multivariate multiple linear regression. Such regressions are improvements over existing procedures that either only consider individual structural performance measures separately or employ a single GMP. Example loss estimates based on selected vectors of structural performance measures are presented to demonstrate how the regression studies may be used in practice.
Constant-roll inflation in the generalized SU(2) Proca theory
Creators: name: Garnica, Juan C.
name: Gomez, L. Gabriel
name: Navarro, Andres A.
name: Rodriguez, Yeinzon
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The generalized SU(2) Proca theory (GSU2P) is a variant of the well known generalized Proca theory where the vector field belongs to the Lie algebra of the SU(2) group of global transformations under which the action is made invariant. New interesting possibilities arise in this framework because of the existence of new interactions of purely non-Abelian character and new configurations of the vector field resulting in spatial spherical symmetry and the cosmological dynamics being driven by the propagating degrees of freedom. We study the two-dimensional phase space of the system that results when the cosmic triad configuration is employed in the Friedmann-Lemaitre-Robertson-Walker background and find an attractor curve whose attraction basin both covers almost all the allowed region and does not include a Big-Bang singularity. Such an attractor curve corresponds to a primordial inflationary solution that has the following characteristic properties: 1.) it is a de Sitter solution whose Hubble parameter is regulated by a generalized version of the SU(2) group coupling constant, 2.) it is constant-roll including, as a limiting case, the slow-roll variety, 3.) a number of e-folds $N > 60$ is easily reached, 4.) it has a graceful exit into a radiation dominated period powered by the canonical kinetic term of the vector field and the Einstein-Hilbert term. The free parameters of the action are chosen such that the tensor sector of the theory is the same as that of general relativity at least up to second-order perturbations, thereby avoiding the presence of ghost and Laplacian instabilities in the tensor sector as well as making the gravity waves propagate at light speed. This is a proof of concept of the interesting properties we could find in this scenario when the coupling constants be replaced by general coupling functions and more terms be discovered in the GSU2P.
description: LaTeX file in WileYMSP-template style, 28 pages, 20 figures. Version published in Annalen der Physik. Dedicated to Carlos J. Quimbay Herrera, Marta A. Losada Falk, and David H. Lyth
Resistive switching characteristics of Cu/MgO/MoS2/Cu structure
Creators: name: Xiaolong, He
name: Peng, Chen
Publisher: name: arXiv
Year: 2025
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: During the study of resistive switching devices, researchers have found that the influence of the insertion layer cannot be ignored. Many reports have confirmed that the appropriate insertion layer can significantly improve the performance of the resistive switching devices. Therefore, in this work, we use magnetron sputtering to fabricate three devices: Cu/MgO/Cu, Cu/MgO/MoS2/Cu and Cu/MoS2/MgO/Cu. Through the characterization test of each device and the measurement of the I-V curve, it is found that the resistive switching characteristics of the Cu/MgO/Cu device will change greatly after adding an MoS2 insertion layer. The analysis results show that the inserted MoS2 layer does not change the main transmission mechanism (space charge limited conduction) of the device, but affects the regulating function of interfacial potential barrier, the effect also is related to the location of MoS2 inserted into the layer. Among the Cu/MgO/Cu, Cu/MgO/MoS2/Cu and Cu/MoS2/MgO/Cu devices, the Cu/MgO/MoS2/Cu device exhibits a larger switching ratio (about 103) and a lower reset voltage (about 0.21 V), which can be attributed to the regulation of the interface barrier between MgO and MoS2. In addition, when the MoS2 layer is inserted between the bottom electrodes Cu and MgO, the leakage current of the device is significantly reduced. Therefore, Cu/MoS2/MgO/Cu device has the highest commercial value from the point of view of practical applications. Finally, according to the XPS results and XRD results, we establish the conductive filament models for the three devices, and analyze the reasons for the different resistive switching characteristics of the three devices.
description: The paper contains 13 pages and 8 figures
A Unified Deep Model of Learning from both Data and Queries for Cardinality Estimation
Creators: name: Wu, Peizhi
name: Cong, Gao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Databases (cs.DB)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Cardinality estimation is a fundamental problem in database systems. To capture the rich joint data distributions of a relational table, most of the existing work either uses data as unsupervised information or uses query workload as supervised information. Very little work has been done to use both types of information, and cannot fully make use of both types of information to learn the joint data distribution. In this work, we aim to close the gap between data-driven and query-driven methods by proposing a new unified deep autoregressive model, UAE, that learns the joint data distribution from both the data and query workload. First, to enable using the supervised query information in the deep autoregressive model, we develop differentiable progressive sampling using the Gumbel-Softmax trick. Second, UAE is able to utilize both types of information to learn the joint data distribution in a single model. Comprehensive experimental results demonstrate that UAE achieves single-digit multiplicative error at tail, better accuracies over state-of-the-art methods, and is both space and time efficient.
description: 14 pages, SIGMOD 2021
Dimensional reduction in quantum spin-1/2 system on a 1/7-depleted triangular lattice
Creators: name: Makuta, Ryo
name: Hotta, Chisa
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the magnetism of a quantum spin-1/2 antiferromagnet on a maple-leaf lattice which is obtained by regularly depleting 1/7 of the sites of a triangular lattice. Although the interactions are set to be spatially uniform, the ground state shows a stripe Neel order and the temperature dependence of magnetic susceptibility follows that of the one-dimensional XXZ model with a finite spin gap. We examine the nature of frustration by mapping the low energy degenerate manifold of states to the fully packed loop-string model on a dual cluster-depleted honeycomb lattice, finding that the order-by-disorder due to quantum fluctuation characteristic of highly frustrated magnets is responsible for the emergent stripes. The excited magnons split into two spinons and propagate in the one-dimensional direction along the stripe which is reminiscent of the XXZ or Ising model in one dimension. Unlike most of the previously studied dimensional reduction effects, our case is purely spontaneous as the interactions of the Hamiltonian retains a spatially isotropic two-dimensional structure.
description: 14 pages, 14 figures
The Candy-Passing Game for c\geq3n-2
Creators: name: Kominers, Paul M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 37B15, 05C38 (Primary); 05C35 (Secondary)

description: We determine the behavior of Tanton's candy-passing game for all distributions of at least 3n-2 candies, where n is the number of students. Specifically, we show that the configuration of candy in such a game eventually becomes fixed.
description: 3 pages; edited in response to referee's comments
Generalising the Horodecki criterion to nonprojective qubit measurements
Creators: name: Hall, Michael J. W.
name: Cheng, Shuming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Horodecki criterion provides a necessary and sufficient condition for a two-qubit state to be able to manifest Bell nonlocality via violation of the Clauser-Horne-Shimony-Holt (CHSH) inequality. It requires, however, the assumption that suitable projective measurements can be made on each qubit, and is not sufficient for scenarios in which noisy or weak measurements are either desirable or unavoidable. By characterising two-valued qubit observables in terms of strength, bias, and directional parameters, we address such scenarios by providing necessary and sufficient conditions for arbitrary qubit measurements having fixed strengths and relative angles for each observer. In particular, we find the achievable maximal values of the CHSH parameter for unbiased measurements on arbitrary states, and, alternatively, for arbitrary measurements on states with maximally-mixed marginals, and determine the optimal angles in some cases. We also show that for certain ranges of measurement strengths it is only possible to violate the CHSH inequality via biased measurements. Finally, we use the CHSH inequality to obtain a simple necessary condition for the compatibility of two qubit observables.
Additional file 4 of Barriers and facilitators to the implementation of social robots for older adults and people with dementia: a scoping review protocol
Creators: name: Koh, Wei Qi
name: Felding, Simone Anna
name: Toomey, Elaine
name: Casey, Dympna
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 4. CFIR Codebook of Definitions.
CMB and 21-cm Signals for Dark Matter with a Long-Lived Excited State
Creators: name: Finkbeiner, Douglas P.
name: Padmanabhan, Nikhil
name: Weiner, Neal
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Motivated by the eXciting Dark Matter (XDM) model of Finkbeiner & Weiner, hypothesized to explain the 511 keV signal in the center of the Milky Way, we consider the CMB and 21-cm signatures of models of dark matter with collisional long-lived excited states. We compute the relic excitation fraction from the early universe for a variety of assumptions about the collisional de-excitation cross-section and thermal decoupling. The relic excitation fraction can be as high as 1% for natural regions of parameter space, but could be orders of magnitude smaller. Since the lifetime of the excited state is naturally greater than 10^13s, we discuss the signatures of such relic excitation on cosmic microwave background (CMB) and high-z 21-cm observations. Such models have potentially richer astrophysical signals than the traditional WIMP annihilations and decays, and may have observable consequences for future generations of experiments.
description: 11 pages, 11 figures, slightly revised, Phys. Rev. D in press
Additional file 1 of Comparative transcriptome analysis reveals novel insights into transcriptional responses to phosphorus starvation in oil palm (Elaeis guineensis) root
Creators: name: Sze-Ling Kong
name: Abdullah, Siti Nor Akmar
name: Chai-Ling Ho
name: Musa, Mohamed Hanafi Bin
name: Wan-Chin Yeap
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 1: Table S1. Summary statistics for RNA-Seq output of 12 paired-end libraries.
Spatially constrained direction dependent calibration
Creators: name: Yatawatta, Sarod
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Direction dependent calibration of widefield radio interferometers estimates the systematic errors along multiple directions in the sky. This is necessary because with most systematic errors that are caused by effects such as the ionosphere or the receiver beam shape, there is significant spatial variation. Fortunately, there is some deterministic behavior of these variations in most situations. We enforce this underlying smooth spatial behavior of systematic errors as an additional constraint onto spectrally constrained direction dependent calibration. Using both analysis and simulations, we show that this additional spatial constraint improves the performance of multi-frequency direction dependent calibration.
description: MNRAS Accepted 2021 December 12. Received 2021 December 11; in original form 2021 October 9
Spontaneous Transverse Response and Amplified Switching in Superconductors with Honeycomb Pinning Arrays
Creators: name: Reichhardt, C.
name: Reichhardt, C. J. Olson
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Using numerical simulations, we show that a novel spontaneous transverse response can appear when a longitudinal drive is applied to type-II superconductors with honeycomb pinning arrays in a magnetic field near certain filling fractions. This response is generated by dynamical symmetry breaking that occurs at fields away from commensurability. We find a coherent strongly amplified transverse switching effect when an additional transverse ac current is applied. The transverse ac drive can also be used to control switching in the longitudinal velocity response. We discuss how these effects could be used to create new types of devices such as current effect transistors.
description: 4 pages, 4 postscript figures. Version to appear in PRL
Generalized Second Law of Thermodynamics in Extended Theories of Gravity
Creators: name: Akbar, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: By employing the general expression of temperature $T_{h}=|κ|/2π= \frac{1}{2π\tilde{r}_{A}}(1-\frac{\dot{\tilde{r}}_{A}}{2H\tilde{r}_{A}})$ associated with the apparent horizon of a FRW universe and assuming a region of FRW universe enclosed by the apparent horizon as a thermal system in equilibrium, we are able to show that the generalized second law of thermodynamics holds in Gauss-Bonnet gravity and in more general Lovelock gravity.
description: 10 pages
Additional file 2 of Comparative transcriptome analysis reveals novel insights into transcriptional responses to phosphorus starvation in oil palm (Elaeis guineensis) root
Creators: name: Sze-Ling Kong
name: Abdullah, Siti Nor Akmar
name: Chai-Ling Ho
name: Musa, Mohamed Hanafi Bin
name: Wan-Chin Yeap
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 2: Figure S1. The 30 most enriched GO classification for (a) 14d and (b) 28d. The y-axis shows the GO terms and the x-axis shows the number of differential expression genes. Different colours are assigned to biological process, cellular component and molecular function respectively.
Effect of particle size on the kinetics of microbiological leaching of chalcopyrite
Creators: name: Blancarte-Zurita, Martha Alicia
Publisher: name: University of British Columbia
Year: 2010

description: An experimental investigation was undertaken to study the microbiological leaching of chalcopyrite by Thiobacillus ferrooxidans. Leach tests were conducted on a small scale using shake flasks. Tests were done which showed that the optimal time for transfer of inocula was between 6 and 8 days. Attempts were made to clarify the complex media-mineral-bacteria interactions that occur in the bioleaching process relating bacterial growth with the changes in media composition as a result of the activities of the bacteria at the mineral surface. In so doing it was observed that a significant amount of copper was leached during the stationary phase of bacterial growth. A sedimentation technique was used to separate the chalcopyrite into various size fractions which were then used to determine bacterial leaching rates in separate experiments. The particle size ranges had average diameters of 1.07, 1.78, 2.52, 3.56, 5.48 and 7.41 μm. The method used to measure particle size was based on the direct comparison of the particles with the scale of an eyepiece micrometer using a microscope. Measurements of particle size distribution made during the course of leaching showed that as the leach proceeded, particle size decreased and the particle size distribution moved in the direction of more particles in the smaller size ranges. An attempt was made to apply Levenspiel's shrinking core model to the data obtained for leaching of the various sized particles. Agreement was reasonable but not perfect between the predicted and measured values of % copper extraction. Better agreement was observed at lower leaching times. Electron micrographs are presented which illustrate the attack of the chalcopyrite particles by the organisms. They also show the effects of jarosite precipitation.
Regulation of star formation by large scale gravito-turbulence
Creators: name: Nusser, Adi
name: Silk, Joseph
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A simple model for star formation based on supernova (SN) feedback and gravitational heating via the collapse of perturbations in gravitationally unstable disks reproduces the Schmidt-Kennicutt relation between the star formation rate (SFR) per unit area, $Σ_{SFR}$, and the gas surface density, $Σ_g$, remarkably well. The gas velocity dispersion, $σ_g$, is derived self-consistently in conjunction with $Σ_{SFR}$ and is found to match the observations. Gravitational instability triggers {"gravito-turbulence"} at the scale of the least stable perturbation mode, boosting $σ_g$ at $Σ_g> \, Σ_g^\textrm{thr}=50\, {\rm M}_\odot\, {\rm pc}^{-2}$, and contributing to the pressure needed to carry the disk weight vertically. $Σ_{SFR}$ is reduced to the observed level at $ Σ_g > Σ_g^\textrm{thr}$, whereas at lower surface densities, SN feedback is the prevailing energy source. Our proposed star formation recipes require efficiencies of order 1\%, and the Toomre parameter, $Q$, for the joint gaseous and stellar disk is predicted to be close to the critical value for marginal stability for $Σ_g< \, Σ_g^\textrm{thr}$, spreading to lower values and larger gas velocity dispersion at higher $Σ_g$.
description: updated bibliography
Stability and Formation of the Resonant System HD 73526
Creators: name: Sandor, Zs.
name: Kley, W.
name: Klagyivik, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Based on radial velocity measurements it has been found recently that the two giant planets detected around the star HD 73526 are in 2:1 resonance. However, as our numerical integration shows, the derived orbital data for this system result in chaotic behavior of the giant planets, which is uncommon among the resonant extrasolar planetary systems. We intend to present regular (non-chaotic) orbital solutions for the giant planets in the system HD 73526 and offer formation scenarios based on combining planetary migration and sudden perturbative effects such as planet-planet scattering or rapid dispersal of the protoplanetary disk. A comparison with the already studied resonant system HD 128311, exhibiting similar behavior, is also done. The new sets of orbital solutions have been derived by the Systemic Console (www.oklo.org). The stability of these solutions has been investigated by the Relative Lyapunov indicator, while the migration and scattering effects are studied by gravitational N-body simulations applying non-conservative forces as well. Additionally, hydrodynamic simulations of embedded planets in protoplanetary disks are performed to follow the capture into resonance. For the system HD 73526 we demonstrate that the observational radial velocity data are consistent with a coplanar planetary system engaged in a stable 2:1 resonance exhibiting apsidal corotation. We have shown that, similarly to the system HD 128311, the present dynamical state of HD 73526 could be the result of a mixed evolutionary process melting together planetary migration and a perturbative event.
description: 12 pages, 14 figures, accepted in A&A, v2: technical changes
ExoFit: Orbital Parameters of Extra-solar Planets from Radial Velocities
Creators: name: Balan, Sreekumar T.
name: Lahav, Ofer
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Retrieval of orbital parameters of extrasolar planets poses considerable statistical challenges.Due to sparse sampling, measurement errors, parameters degeneracy and modelling limitations, there are no unique values of basic parameters, such as period and eccentricity. Here, we estimate the orbital parameters from radial velocity data in a Bayesian framework by utilizing Markov Chain Monte Carlo (MCMC) simulations with the Metropolis-Hastings algorithm. We follow a methodology recently proposed by Gregory and Ford. Our implementation of MCMC is based on the object-oriented approach outlined by Graves. We make our resulting code, ExoFit, publicly available with this paper. It can search for either one or two planets as illustrated on mock data. As an example we re-analysed the orbital solution of companions to HD 187085 and HD 159868 from the published radial velocity data. We confirm the degeneracy reported for orbital parameters of the companion to HD 187085, and show that a low-eccentricity orbit is more probable for this planet. For HD 159868, we obtained slightly different orbital solution and a relatively high 'noise' factor indicating the presence of an unaccounted signal in the radial velocity data. ExoFit is designed in such a way that it can be extended for a variety of probability models, including different Bayesian priors.
description: Accepted to MNRAS, 11 pages, 10 figures. Minor changes in Section 2, Appendix removed . ExoFit can be downloaded from http://www.star.ucl.ac.uk/~lahav/exofit.html
Quantum heat engines with complex working media, complete Otto cycles and heuristics
Creators: name: Mehta, Venu
name: Johal, Ramandeep S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Quantum thermal machines make use of non-classical thermodynamic resources, one of which is interactions between elements of the quantum working medium. In this paper, we examine the performance of a quasi-static quantum Otto engine based on two spins of arbitrary magnitudes subject to an external magnetic field and coupled via an isotropic Heisenberg exchange interaction. It has been earlier shown that the said interaction provides an enhancement of cycle efficiency for two spin-1/2 particles, with an upper bound which is tighter than the Carnot efficiency. However, the necessary conditions governing engine performance and the relevant upper bound for efficiency are unknown for the general case of arbitrary spin magnitudes. Analyzing extreme-case scenarios, we formulate heuristics to infer the necessary conditions for an engine with uncoupled as well as coupled spins model. These conditions lead us to a connection between performance of quantum heat engines and the notion of majorization. Further, the study of complete Otto cycles inherent in the average cycle also yields interesting insights into the average performance.
description: RevTex 4-2, 26 pages, 7 figures; Comments are welcome
Students’ Sapioemotionality and its Manifestation in Persian Language Textbooks in Junior High Schools
Creators: name: Ebrahimi, Shima
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 390303
subject: Higher education

description: Education’s pivotal role in shaping cultural and identity elements is evident in its influence on both individuals and elites. This study explores sapioemotionality, referring to the emotional responses experienced by junior high school students when encountering elites. Persian language textbooks are considered crucial for cultural awareness. This study examines the portrayal of elites in these textbooks. Sapioemotionality, encompassing positive and negative convergence and divergence at individual and social levels, focuses on emotions elicited by elites’ presence. A total of 917 junior high students from various disciplines and levels participated in the study, completing the Sapioemotionality Questionnaire. The findings indicate significant gender disparities, with girls exhibiting higher sapioemotionality and a specific fascination with female elites. Tenth-grade students exhibited higher levels of sapioemotionality, which varied depending on their field of study. Mathematics-physics students demonstrated lower levels of sapioemotionality compared to literature and humanities, and experimental sciences students. A qualitative analysis of Persian Language textbooks, suggesting a shortfall in addressing sapioemotionality, with 76% of students perceiving a lack of attention to elites. These necessities textbook revisions that align with students’ emotional responses and cultural values, ensuring a more engaging and culturally relevant educational experience.
Branes, Anti-Branes and Brauer Algebras in Gauge-Gravity duality
Creators: name: Kimura, Yusuke
name: Ramgoolam, Sanjaye
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We propose gauge theory operators built using a complex Matrix scalar which are dual to brane-anti-brane systems in $AdS_5 \times S^5 $, in the zero coupling limit of the dual Yang-Mills. The branes involved are half-BPS giant gravitons. The proposed operators dual to giant-anti-giant configurations satisfy the appropriate orthogonality properties. Projection operators in Brauer algebras are used to construct the relevant multi-trace Matrix operators. These are related to the ``coupled representations'' which appear in 2D Yang-Mills theory. We discuss the implications of these results for the quantum mechanics of a complex matrix model, the counting of non-supersymmetric operators and the physics of brane-anti-brane systems. The stringy exclusion principle known from the properties of half-BPS giant gravitons, has a new incarnation in this context. It involves a qualitative change in the map between brane-anti-brane states to gauge theory operators. In the case of a pair of sphere giant and anti-giant this change occurs when the sum of the magnitudes of their angular momenta reaches $N$.
description: 52 pages, 10 figures
Two-twistor Description of Membrane
Creators: name: Fedoruk, Sergey
name: Lukierski, Jerzy
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe D=4 twistorial membrane in terms of two twistorial three-dimensional world volume fields. We start with the D-dimensional p-brane generalizations of two phase space string formulations: the one with $p+1$ vectorial fourmomenta, and the second with tensorial momenta of $(p+1)$-th rank. Further we consider tensionful membrane case in D=4. By using the membrane generalization of Cartan-Penrose formula we express the fourmomenta by spinorial fields and obtain the intermediate spinor-space-time formulation. Further by expressing the worldvolume dreibein and the membrane space-time coordinate fields in terms of two twistor fields one obtains the purely twistorial formulation. It appears that the action is generated by a geometric three-form on two-twistor space. Finally we comment on higher-dimensional (D>4) twistorial p-brane models and their superextensions.
description: LaTeX 8 pages, revtex4. V2: 4 references added, minor text corrections