cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Inferring Influence Networks from Longitudinal Bipartite Relational Data
Creators: name: Marrs, Frank W.
name: Campbell, Benjamin W.
name: Fosdick, Bailey K.
name: Cranmer, Skyler J.
name: Böhmelt, Tobias
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: Longitudinal bipartite relational data characterize the evolution of relations between pairs of actors, where actors are of two distinct types and relations exist only between disparate types. A common goal is to understand the temporal dependencies, specifically which actor relations incite later actor relations. There are two primary existing approaches to this problem. The first projects the bipartite data in each time period to a unipartite network and uses existing unipartite network models. Unfortunately, information is lost in calculating the projection and generative models for networks obtained through this process are scarce. The second approach represents dependencies using two unipartite influence networks, corresponding to the two actor types. Existing models taking this approach are bilinear in the influence networks, creating challenges in computation and interpretation. We propose a novel generative model that permits estimation of weighted, directed influence networks and does not suffer from these shortcomings. The proposed model is linear in the influence networks, permitting inference using off-the-shelf software tools. We prove our estimator is consistent under cases of model misspecification and nearly asymptotically equivalent to the bilinear estimator. We demonstrate the performance of the proposed model in simulation studies and an analysis of weekly international state interactions.
Non-equilibrium carrier dynamics and band structure of graphene on 2D tin
Creators: name: Federl, Maria-Elisabeth
name: Witt, Niklas
name: Yang, Biao
name: Weigl, Leonard
name: Hofmann, Niklas
name: Gradl, Johannes
name: Piquero-Zulaica, Ignacio
name: Barth, Johannes V.
name: Mishra, Neeraj
name: Coletti, Camilla
name: Wehling, Tim O.
name: Gierz, Isabella
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Intercalation of epitaxial graphene on SiC(0001) with Sn results in a well-ordered Sn $(1\times1)$ structure on the SiC surface with quasi-freestanding graphene on top. While the electronic properties of the individual layers have been studied in the past, emerging phenomena arising from possible inter-layer interactions between the 2D\,Sn layer and graphene remain unexplored. We use time- and angle-resolved photoemission spectroscopy to reveal a surprisingly short-lived non-equilibrium carrier distribution inside the Dirac cone of Sn-intercalated graphene. Further, we find that the graphene $π$-band exhibits a transient increase in binding energy that we attribute to charging of the graphene layer with holes. We interpret our results with support from density functional theory calculations of the graphene - 2D\,Sn heterostructure that reveal a substantial hybridization between the graphene $π$-bands and Sn states, providing a channel for efficient ultrafast charge transfer between the layers. Our results on the graphene - 2D\,Sn model system are expected to trigger similar investigations on related heterostructures obtained by intercalation of epitaxial graphene. Regarding the huge choice of materials that have been successfully intercalated in the past, we believe that the interlayer interactions revealed in the present work only represent the tip of the iceberg with many fascinating emerging phenomena to be discovered in the near future.
description: 19 pages, 5 figures
The Angular Power Spectra of Photometric SDSS LRGs
Creators: name: Thomas, Shaun A.
name: Abdalla, Filipe B.
name: Lahav, Ofer
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We construct new galaxy angular power spectra based on the extended, updated and final SDSS II Luminous Red Galaxy (LRG) photometric redshift survey: MegaZ DR7. Encapsulating 7746 deg^{2} we utilise 723,556 photometrically determined LRGs between 0.45 < z < 0.65 in a 3.3 (Gpc h^{-1})^3 spherical harmonic analysis of the galaxy distribution. By combining four photometric redshift bins we find preliminary parameter constraints of f_{b} = Ω_{b}/Ω_{m} = 0.173 +/- 0.046 and Ω_{m} = 0.260 +/- 0.035 assuming H_{0} = 75 km s^{-1} Mpc^{-1}, n_{s}=1 and Ω_{k} = 0. These limits are consistent with the CMB and the previous data release (DR4). The C_{\ell} are sensitive to redshift space distortions and therefore we also recast our constraints into a measurement of β~ Ω_{m}^{0.55}/b in different redshift shells. The robustness of these power spectra with respect to a number of potential systematics such as extinction, photometric redshift and ANNz training set extrapolation are examined. The latter includes a cosmological comparison of available photometric redshift estimation codes where we find excellent agreement between template and empirical estimation methods. MegaZ DR7 represents a methodological prototype to next generation surveys such as the Dark Energy Survey (DES) and, furthermore, is a photometric precursor to the spectroscopic BOSS survey. Our galaxy catalogue and all power spectra data can be found at http://zuserver2.star.ucl.ac.uk/~sat/MegaZ/MegaZDR7.tar.gz.
description: MNRAS Accepted: 20 pages - Galaxy catalogue and power spectra included online
Partial measurements and the realization of quantum-mechanical counterfactuals
Creators: name: Paraoanu, G. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: We propose partial measurements as a conceptual tool to understand how to operate with counterfactual claims in quantum physics. Indeed, unlike standard von Neumann measurements, partial measurements can be reversed probabilistically. We first analyze the consequences of this rather unusual feature for the principle of superposition, for the complementarity principle, and for the issue of hidden variables. Then we move on to exploring non-local contexts, by reformulating the EPR paradox, the quantum teleportation experiment, and the entanglement-swapping protocol for the situation in which one uses partial measurements followed by their stochastic reversal. This leads to a number of counter-intuitive results, which are shown to be resolved if we give up the the idea of attributing reality to the wavefunction of a single quantum system.
description: 22 pages, 3 figures
Visual right-angled Artin subgroups of two-dimensional right-angled Coxeter groups
Creators: name: Cashen, Christopher H.
name: Edletzberger, Alexandra
Publisher: name: arXiv
Year: 2024
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65, 20F55

description: There is a procedure, due to Dani and Levcovitz, for taking a finite simplicial graph (Γ) and a subgraph (Λ) of its complement, checking some conditions, and, if satisfied, producing a graph (Δ) such that the right-angled Artin group with presentation graph (Δ) is a finite index subgroup of the right-angled Coxeter group with presentation graph (Γ). They do not tell us how to find (Λ), given (Γ).
 We show, in the 2--dimensional case, that the existence of such a (Λ) is connected to the graph property of satellite-dismantlabilty of (Γ), and we use this to give an algorithm for producing a suitable (Λ) or deciding that one does not exist.
description: 11 pages
Providing content based billing architecture over Next Generation Network
Creators: name: Lakhtaria, Kamaljit I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Mobile Communication marketplace has stressed that "content is king" ever since the initial footsteps for Next Generation Networks like 3G, 3GPP, IP Multimedia subsystem (IMS) services. However, many carriers and content providers have struggled to drive revenue for content services, primarily due to current limitations of certain types of desirable content offerings, simplistic billing models, and the inability to support flexible pricing, charging and settlement. Unlike wire line carriers, wireless carriers have a limit to the volume of traffic they can carry, bounded by the finite wireless spectrum. Event based services like calling, conferencing etc., only perceive charge per event, while the Content based charging system attracts Mobile Network Operators (MNOs) to maximize service delivery to customer and achieve best ARPU. With the Next Generation Networks, the number of data related services that can be offered, is increased significantly. The wireless carrier will be able to move from offering wireless telecommunications services to offering wireless telecommunication services plus a number of personalized Value Added Services like news, games, video broadcasts, or multimedia messaging service (MMS) through the network. The next generation Content Based Billing systems allow the operators to maximize their revenues from such services. These systems will enable operators to offer and bill for application-based and content-based services, rather than for just bytes of data. Therefore, the wireless business focus is no longer on infrastructure build-outs but on customer retention and increased average revenue per customer (ARPU). The mobile operator generates new revenues, strengthens brand value, and differentiates its service to attract and retain customers.
On some intrinsic differentiability properties for Absolutely continuous functions between Carnot groups and the Area formula
Creators: name: Pinamonti, Andrea
name: Cassano, Francesco Serra
name: Zambanini, Kilian
Publisher: name: arXiv
Year: 2024
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We discuss Q-absolutely continuous functions between Carnot groups, following Maly's definition for maps of several variables. Such maps enjoy nice regularity properties, like continuity, Pansu differentiability a.e., weak differentiability and an Area formula. Furthermore, we extend Stein's result concerning the sharp condition for continuity and differentiability a.e. of a Sobolev map in terms of the integrability of the weak gradient: more precisely, we prove that a Sobolev map between Carnot groups with horizontal gradient of its sections uniformly bounded in L(Q,1) admits a representative which is Q-absolutely continuous.
description: Accepted on journal of Functional Analysis (J.Funct.Anal), 2025
Whole Earth Telescope Observations of the subdwarf B star KPD 1930+2752: A rich, short period pulsator in a close binary
Creators: name: Reed, M. D.
name: Harms, S. L.
name: Poindexter, S.
name: Zhou, A. -Y.
name: Eggen, J. R.
name: Morris, M. A.
name: Quint, A. C.
name: McDaniel, S.
name: Baran, A.
name: Dolez, N.
name: Kawaler, S. D.
name: Kurtz, D. W.
name: Moskalik, P.
name: Riddle, R.
name: Zola, S.
name: Ostensen, R. H.
name: Solheim, J. -E.
name: Kepler, S. O.
name: Costa, A. F. M.
name: Provencal, J. L.
name: Mullally, F.
name: Winget, D. W.
name: Vuckovic, M.
name: Crowe, R.
name: Terry, D.
name: Avila, R.
name: Berkey, B.
name: Stewart, S.
name: Bodnarik, J.
name: Bolton, D.
name: Binder, P. -M.
name: Sekiguchi, K.
name: Sullivan, D. J.
name: Kim, S. -L.
name: Chen, W. -P.
name: Chen, C. -W.
name: Lin, H. -C.
name: Jian, X. -J.
name: Wu, H.
name: Gou, J. -P.
name: Liu, Z.
name: Leibowitz, E.
name: Lipkin, Y.
name: Akan, C.
name: Cakirli, O.
name: Janulis, R.
name: Pretorius, R.
name: Ogloza, W.
name: Stachowski, G.
name: Paparo, M.
name: Szabo, R.
name: Csubry, Z.
name: Zsuffa, D.
name: Silvotti, R.
name: Marinoni, S.
name: Bruni, I.
name: Vauclair, G.
name: Chevreton, M.
name: Matthews, J. M.
name: Cameron, C.
name: Pablo, H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: KPD 1930+2752 is a short-period pulsating subdwarf B (sdB) star. It is also an ellipsoidal variable with a known binary period just over two hours. The companion is most likely a white dwarf and the total mass of the system is close to the Chandresakhar limit. In this paper we report the results of Whole Earth Telescope (WET) photometric observations during 2003 and a smaller multisite campaign from 2002. From 355 hours of WET data, we detect 68 pulsation frequencies and suggest an additional 13 frequencies within a crowded and complex temporal spectrum between 3065 and 6343 $μ$Hz (periods between 326 and 157 s). We examine pulsation properties including phase and amplitude stability in an attempt to understand the nature of the pulsation mechanism. We examine a stochastic mechanism by comparing amplitude variations with simulated stochastic data. We also use the binary nature of KPD 1930+2752 for identifying pulsation modes via multiplet structure and a tidally-induced pulsation geometry. Our results indicate a complicated pulsation structure that includes short-period ($\approx 16$ h) amplitude variability, rotationally split modes, tidally-induced modes, and some pulsations which are geometrically limited on the sdB star.
description: 30 pages, 17 figures, 11 tables. Accepted for publication by MNRAS
Dynamics of McMillan mappings I. McMillan multipoles
Creators: name: Zolkin, Tim
name: Nagaitsev, Sergei
name: Morozov, Ivan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: In this article, we consider two dynamical systems: the McMillan sextupole and octupole integrable mappings, originally proposed by Edwin McMillan. Both represent the simplest symmetric McMillan maps, characterized by a single intrinsic parameter. While these systems find numerous applications across various domains of mathematics and physics, some of their dynamical properties remain unexplored. We aim to bridge this gap by providing a comprehensive description of all stable trajectories, including the parametrization of invariant curves, Poincaré rotation numbers, and canonical action-angle variables.
 In the second part, we establish connections between these maps and general chaotic maps in standard form. Our investigation reveals that the McMillan sextupole and octupole serve as first-order approximations of the dynamics around the fixed point, akin to the linear map and quadratic invariant (known as the Courant-Snyder invariant in accelerator physics), which represents zeroth-order approximations (referred to as linearization). Furthermore, we propose a novel formalism for nonlinear Twiss parameters, which accounts for the dependence of rotation number on amplitude. This stands in contrast to conventional betatron phase advance used in accelerator physics, which remains independent of amplitude. Notably, in the context of accelerator physics, this new formalism demonstrates its capability in predicting dynamical aperture around low-order resonances for flat beams, a critical aspect in beam injection/extraction scenarios.
Habitat selection of Dusky Grouse on a biosolids-remediated cattle ranch in British Columbia
Creators: name: Lawson, Kirstie Jaylene
Publisher: name: University of British Columbia
Year: 2018

description: In North America, habitat loss and fragmentation have caused declines in many gallinaceous species. Before we can understand how these changes to a landscape affect an individual species, we must first understand how that species uses their habitat. Our understanding of dusky grouse (Dendragapus obscurus) habitat selection is lacking and I focus my research on increasing our knowledge of this forest grouse species. In this thesis, I assess microhabitat selection at nesting and brood-rearing sites, as well as patch-level habitat selection and the effects of biosolids on amendments on habitat selection of dusky grouse. I trapped and radio-collared 26 dusky grouse hens during 2016-2017 and tracked individuals throughout the summer months (May-July). I used model selection in an AIC framework to determine which vegetation variables affect dusky grouse choice of nesting and brood-rearing sites at the microhabitat level. Dusky grouse are habitat generalists. However, hens selected nest sites with high visual cover, and nest success was positively influenced by visual obstruction of the nest bowl. This suggests that cover from predators is important when hens select nest sites, and that predation may be influenced by the predator’s ability to see the nest. Brood sites were more variable, and brood hens appeared to choose sites based on non-vegetative variables. Furthermore, the use of biosolids, treated human waste, on the landscape allowed me to look at dusky grouse use these amendments. I assess broad-scale habitat select through patch-level use of available habitat types and the distance dusky grouse traveled into biosolids-amended and untreated grasslands. I found drastic year differences in selection and use of grasslands, and weather or food abundance may play a role in site selection. In 2017, a much drier, warmer year, dusky grouse hens traveled significantly further into biosolids-amended grasslands than untreated grasslands. In 2016, hens traveled much further into grasslands overall, showing similar distributions in both biosolids-amended and untreated grasslands. My research suggests that biosolids may be beneficial for dusky grouse in drought years, by enhancing plant growth and increasing insect densities.
32117: Reading with dog
Creators: name: Project, Lockdown2020 and Beyond
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 479999
subject: Other language, communication and culture not elsewhere classified

description: It's morning, and the day is wide and empty of obligations. Downstairs, my French bulldog and five cats await me, along with a huge pile of books - Sylvia Plath's letters and journals, books on creolised folklore from Mexico and Celtic language-speaking lands, and some cookbooks. After my bulldog and I have sniffed one another carefully, it's time for coffee, and after that, the only sound is pages turning until it's time to take her for a walk around the silent village. She is immensely happy; the whole family is at home, and so are the cats. In the afternoon, there's bread baking and another walk around the garden to admire the new roses that have opened during the day. Birdsong is loud and sweet. Then back to more reading. Honestly, this is paradise.
The Radio and Microwave Sky as Seen by Juno on its Mission to Jupiter
Creators: name: Anderson, Christopher
name: Berger, Philippe
name: Chang, Tzu-Ching
name: Doré, Olivier
name: Brown, Shannon
name: Levin, Steve
name: Seiffert, Michael
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present six nearly full-sky maps made from data taken by radiometers on the Juno satellite during its 5-year flight to Jupiter. The maps represent integrated emission over $\sim 4\%$ passbands spaced approximately in octaves between 600 MHz and 21.9 GHz. Long time-scale offset drifts are removed in all bands, and, for the two lowest frequency bands, gain drifts are also removed from the maps via a self-calibration algorithm similar to the NPIPE pipeline used by the Planck collaboration. We show that, after this solution is applied, statistical noise in the maps is consistent with thermal radiometer noise and expected levels of correlated noise on the gain and noise drift solutions. We verify our map solutions with several consistency tests and end-to-end simulations. We also estimate the level of systematic pixelization noise and polarization leakage via simulations.
description: Minor changes to the text. Added over-hat estimator notation to equations in section 3 for clarity. Fixed typo in equation 15. Re-computed the noise and gain solutions for R1 and R2 at higher map resolution, reducing errors. Updated estimates of correlated map-space errors for all bands and verified them against simulations (figure 10). 17 pages, 14 figures
Coherent potential approximation of random nearly isostatic kagome lattice
Creators: name: Mao, Xiaoming
name: Lubensky, T. C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The kagome lattice has coordination number $4$, and it is mechanically isostatic when nearest neighbor ($NN$) sites are connected by central force springs. A lattice of $N$ sites has $O(\sqrt{N})$ zero-frequency floppy modes that convert to finite-frequency anomalous modes when next-nearest-neighbor ($NNN$) springs are added. We use the coherent potential approximation (CPA) to study the mode structure and mechanical properties of the kagome lattice in which $NNN$ springs with spring constant $κ$ are added with probability $\Prob= Δz/4$, where $Δz= z-4$ and $z$ is the average coordination number. The effective medium static $NNN$ spring constant $κ_m$ scales as $\Prob^2$ for $\Prob \ll κ$ and as $\Prob$ for $\Prob \gg κ$, yielding a frequency scale $ω^* \sim Δz$ and a length scale $l^*\sim (Δz)^{-1}$. To a very good approximation at at small nonzero frequency, $κ_m(\Prob,ω)/κ_m(\Prob,0)$ is a scaling function of $ω/ω^*$. The Ioffe-Regel limit beyond which plane-wave states becomes ill-define is reached at a frequency of order $ω^*$.
description: 15 pages, 8 figures
Witnessing Entanglement and Quantum Correlations in Condensed Matter: A Review
Creators: name: Laurell, Pontus
name: Scheie, Allen
name: Dagotto, Elbio
name: Tennant, D. Alan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The detection and certification of entanglement and quantum correlations in materials is of fundamental and far-reaching importance, and has seen significant recent progress. It impacts both our understanding of the basic science of quantum many-body phenomena as well as the identification of systems suitable for novel technologies. Frameworks suitable to condensed matter that connect measurements to entanglement and coherence have been developed in the context of quantum information theory. These take the form of entanglement witnesses and quantum correlation measures.
 The underlying theory of these quantities, their relation to condensed matter experimental techniques, and their application to real materials are comprehensively reviewed. In addition, their usage in e.g. protocols, the relative advantages and disadvantages of witnesses and measures, and future prospects in, e.g., correlated electrons, entanglement dynamics, and entangled spectroscopic probes, are presented. Consideration is given to the interdisciplinary nature of this emerging research and substantial ongoing progress by providing an accessible and practical treatment from fundamentals to application. Particular emphasis is placed on quantities accessible to collective measurements, including by susceptibility and spectroscopic techniques. This includes the magnetic susceptibility witness, one-tangle, concurrence and two-tangle, two-site quantum discord, and quantum coherence measures such as the quantum Fisher information.
description: 41 pages, 13 figures, 2 tables
Comment on `Lost in Translation: Topological Singularities in Group Field Theory'
Creators: name: Smerlak, Matteo
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Geometric Topology (math.GT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Gurau argued in [arXiv:1006.0714] that the gluing spaces arising as Feynman diagrams of three-dimensional group field theory are not all pseudo-manifolds. I dispute this conclusion: albeit not properly triangulated, these spaces are genuine pseudo-manifolds, viz. their singular locus is of codimension at least two.
Dual-Capability Machine Learning Models for Quantum Hamiltonian Parameter Estimation and Dynamics Prediction
Creators: name: An, Zheng
name: Wu, Jiahui
name: Lin, Zidong
name: Yang, Xiaobo
name: Li, Keren
name: Zeng, Bei
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent advancements in quantum hardware and classical computing simulations have significantly enhanced the accessibility of quantum system data, leading to an increased demand for precise descriptions and predictions of these systems. Accurate prediction of quantum Hamiltonian dynamics and identification of Hamiltonian parameters are crucial for advancements in quantum simulations, error correction, and control protocols. This study introduces a machine learning model with dual capabilities: it can deduce time-dependent Hamiltonian parameters from observed changes in local observables within quantum many-body systems, and it can predict the evolution of these observables based on Hamiltonian parameters. Our model's validity was confirmed through theoretical simulations across various scenarios and further validated by two experiments. Initially, the model was applied to a Nuclear Magnetic Resonance quantum computer, where it accurately predicted the dynamics of local observables. The model was then tested on a superconducting quantum computer with initially unknown Hamiltonian parameters, successfully inferring them. Our approach aims to enhance various quantum computing tasks, including parameter estimation, noise characterization, feedback processes, and quantum control optimization.
description: 19 pages, 14 figures
Photometric Observations of Three High Mass X-Ray Binaries and a Search for Variations Induced by Orbital Motion
Creators: name: Sarty, Gordon E.
name: Pilecki, Bogumil
name: Reichart, Daniel E.
name: Ivarsen, Kevin M.
name: Haislip, Joshua B.
name: Nysewander, Melissa C.
name: LaCluyze, Aaron P.
name: Johnston, Helen M.
name: Shobbrook, Robert R.
name: Kiss, Laszlo L.
name: Wu, Kinwah
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We searched for long period variation in V-band, Ic-band and RXTE X-ray light curves of the High Mass X-ray Binaries (HMXBs) LS 1698 / RX J1037.5-5647, HD 110432 / 1H 1249-637 and HD 161103 / RX J1744.7-2713 in an attempt to discover orbitally induced variation. Data were obtained primarily from the ASAS database and were supplemented by shorter term observations made with the 24- and 40-inch ANU telescopes and one of the robotic PROMPT telescopes. Fourier periodograms suggested the existence of long period variation in the V-band light curves of all three HMXBs, however folding the data at those periods did not reveal convincing periodic variation. At this point we cannot rule out the existence of long term V-band variation for these three sources and hints of longer term variation may be seen in the higher precision PROMPT data. Long term V-band observations, on the order of several years, taken at a frequency of at least once per week and with a precision of 0.01 mag, therefore still have a chance of revealing long term variation in these three HMXBs.
description: Accepted, RAA, May, 2011
Optimal Reference Nodes Deployment for Positioning Seafloor Anchor Nodes
Creators: name: Huang, Wei
name: Wu, Pengfei
name: Xu, Tianhe
name: Zhang, Hao
name: Meng, Kaitao
Publisher: name: arXiv
Year: 2024
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Seafloor anchor nodes, which form a geodetic network, are designed to provide surface and underwater users with positioning, navigation and timing (PNT) services. Due to the non-uniform distribution of underwater sound speed, accurate positioning of underwater anchor nodes is a challenge work. Traditional anchor node positioning typically uses cross or circular shapes, however, how to optimize the deployment of reference nodes for positioning underwater anchor nodes considering the variability of sound speed has not yet been studied. This paper focuses on the optimal reference nodes deployment strategies for time--of--arrival (TOA) localization in the three-dimensional (3D) underwater space. We adopt the criterion that minimizing the trace of the inverse Fisher information matrix (FIM) to determine optimal reference nodes deployment with Gaussian measurement noise, which is positive related to the signal propagation path. A comprehensive analysis of optimal reference-target geometries is provided in the general circumstance with no restriction on the number of reference nodes, elevation angle and reference-target range. A new semi-closed form solution is found to detemine the optimal geometries. To demonstrate the findings in this paper, we conducted both simulations and sea trials on underwater anchor node positioning. Both the simulation and experiment results are consistent with theoretical analysis.
Conductance oscillations of a spin-orbit stripe with polarized contacts
Creators: name: Gelabert, M. M.
name: Serra, Ll.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the linear conductance of a stripe of spin-orbit interaction in a 2D electron gas; that is, a 2D region of length $\ell$ along the transport direction and infinite in the transverse one in which a spin-orbit interaction of Rashba type is present. Polarization in the contacts is described by means of Zeeman fields. Our model predicts two types of conductance oscillations: Ramsauer oscillations in the minority spin transmission, when both spins can propagate, and Fano oscillations when only one spin propagates. The latter are due to the spin-orbit coupling with quasibound states of the non propagating spin. In the case of polarized contacts in antiparallel configuration Fano-like oscillations of the conductance are still made possible by the spin orbit coupling, even though no spin component is bound by the contacts. To describe these behaviors we propose a simplified model based on an ansatz wave function. In general, we find that the contribution for vanishing transverse momentum dominates and defines the conductance oscillations. Regarding the oscillations with Rashba coupling intensity, our model confirms the spin transistor behavior, but only for high degrees of polarization. Including a position dependent effective mass yields additional oscillations due to the mass jumps at the interfaces.
description: 8.5 pages, 9 figures
Characterizing dynamical criticality of many-body localization transitions from the Fock-space perspective
Creators: name: Sun, Zheng-Hang
name: Wang, Yong-Yi
name: Cui, Jian
name: Fan, Heng
name: Heyl, Markus
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Characterizing the nature of many-body localization transitions (MBLTs) and their potential critical behaviors has remained a challenging problem. In this work, we study the dynamics of the displacement, quantifying the spread of the radial probability distribution in the Fock space, for three systems with MBLTs, i.e., the Hamiltonian models with quasiperiodic and random fields, as well as a random-circuit Floquet model of a MBLT. We then perform a finite-size scaling analysis of the long-time averaged displacement by considering two types of ansatz for MBLTs, i.e., continuous and BKT transitions. The data collapse based on the assumption of a continuous phase transition with power-law correlation length reveals that the scaling exponent of the MBLT induced by random field is close to that of the Floquet model, but significantly differes from the quasiperiodic model. Additionally, we find that the BKT-type scaling provides a more accurate description of the MBLTs in the random model and the Floquet model, yielding larger (finite-size) critical points compared to those obtained from power-law scaling. Our work highlights that the displacement is a valuable tool for studying MBLTs, as relevant to ongoing experimental efforts.
Macroscopic Multi-Species Entanglement near Quantum Phase Transitions
Creators: name: Subrahmanyam, V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Multi-Species entanglement, defined for a many-particle system as the entanglement between different species of particles, is shown to exist in the thermodynamic limit of the system size going to infinity. This macroscopic entanglement, as it can exhibit singular behavior, is capable of tracking quantum phase transitions. The entanglement between up and down spins has been analytically calculated for the one-dimensional Ising model in a transverse magnetic field. As the coupling strength is varied, the first derivative of the entanglement shows a jump discontinuity and the second derivative diverges near the quantum critical point.
The effects of TeaCrine® and caffeine on endurance and cognitive performance during a simulated match in high-level soccer players
Creators: name: Bello, Marissa
Publisher: name: No Publisher Supplied
Year: 2019

description: Theacrine (1,3,7,9-tetramethyluric-acid) is a pure alkaloid with a similar structure to caffeine and acts comparably as an adenosine receptor antagonist. Early studies have shown non-habituating effects, including increases in energy, focus, and concentration in Teacrine®, the compound containing pure theacrine. PURPOSE: to determine and compare the effects of Teacrine® and caffeine on cognitive performance and time-to-exhaustion during a simulated soccer game in high-level male and female athletes. METHODS: Elite male and female soccer players (N=24; MAge=20.96±2.05y, MMaleVO2max=55.31±3.39mL/O2/kg, MFemaleVO2max=50.97±3.90mL/O2/kg) completed a simulated 90-min soccer match protocol on a treadmill, with cognitive testing including simple reaction time (SRT); choice-RT during a go/no-go task (CRT); and complex-RT during a dual task of go/no go (COGRT) with distraction questions at halftime, and end-of-game. End-of-game testing was followed by a run to exhaustion at 85% VO2max. Participants completed four sessions in randomized order ingesting either 275mg teacrine (TCr), 275mg caffeine (Caf), 125/150mg teacrine+caffeine (TCr+Caf), or placebo(P) 30 min prior to the match. Time of day and pre-exercise nutrition were controlled. RM-MANOVAs with univariate follow-ups were conducted and significance was set at P<0.05. RESULTS: Time-to-exhaustion trended toward improvements in all conditions when compared to placebo (ESTCr=0.43, ESCaf=0.41, ESTCr+Caf=0.51). There was a condition main effect (P<0.05) in which Caf (0.595±0.054s) and TCr+Caf (0.590±0.059s) improved CRT compared to P (0.608±0.067s). There was a significant Time main effect for COGRTWrong, with improved accuracy at post compared to mid (16.46±2.02 vs. 19.20±2.13). A Time main effect also occurred for SRT, with better RT at mid compared to post (0.639±0.054s vs. 0.646±0.054s). However, a Time x Condition interaction (P<0.05) revealed that P improved from mid to post instead (0.646±0.064s vs. 0.632±0.049s). CONCLUSION: The 27-38% improvements in time-to-exhaustion reflect an increased performance capacity with these supplements that may have important implications for “added time” scenarios. The larger improvement in choice-RT from TCr+Caf may be due to overlapping peak times for the supplements, leading athletes to sustain greater focus under fatigue for longer periods compared to the other conditions. Peak times may also play a role as the largest SRT improvements occurred at mid compared to post-game; perhaps a higher dosage would cause less of a decline during the transition between Caf and TCr. The improvement seen in accuracy post-game may indicate a training effect for allocation of resources toward the end of a game when players need greater concentration.
Generic transverse stability of kink structures in atomic and optical nonlinear media with competing attractive and repulsive interactions
Creators: name: Mistakidis, S. I.
name: Bougas, G.
name: Katsimiga, G. C.
name: Kevrekidis, P. G.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We demonstrate the existence and stability of one-dimensional (1D) topological kink configurations immersed in higher-dimensional bosonic gases and nonlinear optical setups. Our analysis pertains, in particular, to the two- and three-dimensional extended Gross-Pitaevskii models with quantum fluctuations describing droplet-bearing environments but also to the two-dimensional cubic-quintic nonlinear Schrödinger equation containing higher-order corrections to the nonlinear refractive index. Contrary to the generic dark soliton transverse instability, the kink structures are generically robust under the interplay of low-amplitude attractive and high-amplitude repulsive interactions. A quasi-1D effective potential picture dictates the existence of these defects, while their stability is obtained numerically and analytically through linearization analysis and direct dynamics in the presence of external fluctuations showcasing their unprecedented resilience. These generic (across different models) findings should be detectable in current cold atom and optics experiments, offering insights towards controlling topological excitations.
description: 5 pages, 3 figures
32118: Digital Rehearsals
Creators: name: Project, Lockdown2020 and Beyond
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 479999
subject: Other language, communication and culture not elsewhere classified

description: I am the Music Director for the Devon Philharmonic Orchestra. Usually I would be conducting rehearsals for a 100-piece orchestra, because of Covid-19 I began digital rehearsals instead.
FTS: A Framework to Find a Faithful TimeSieve
Creators: name: Lai, Songning
name: Feng, Ninghui
name: Sui, Haochen
name: Ma, Ze
name: Wang, Hao
name: Song, Zichen
name: Zhao, Hang
name: Yue, Yutao
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The field of time series forecasting has garnered significant attention in recent years, prompting the development of advanced models like TimeSieve, which demonstrates impressive performance. However, an analysis reveals certain unfaithfulness issues, including high sensitivity to random seeds and minute input noise perturbations. Recognizing these challenges, we embark on a quest to define the concept of \textbf{\underline{F}aithful \underline{T}ime\underline{S}ieve \underline{(FTS)}}, a model that consistently delivers reliable and robust predictions. To address these issues, we propose a novel framework aimed at identifying and rectifying unfaithfulness in TimeSieve. Our framework is designed to enhance the model's stability and resilience, ensuring that its outputs are less susceptible to the aforementioned factors. Experimentation validates the effectiveness of our proposed framework, demonstrating improved faithfulness in the model's behavior. Looking forward, we plan to expand our experimental scope to further validate and optimize our algorithm, ensuring comprehensive faithfulness across a wide range of scenarios. Ultimately, we aspire to make this framework can be applied to enhance the faithfulness of not just TimeSieve but also other state-of-the-art temporal methods, thereby contributing to the reliability and robustness of temporal modeling as a whole.
Eclipsing Binary Science Via the Merging of Transit and Doppler Exoplanet Survey Data - A Case Study With the MARVELS Pilot Project and SuperWASP
Creators: name: Fleming, Scott W.
name: Maxted, Pierre F. L.
name: Hebb, Leslie
name: Stassun, Keivan G.
name: Ge, Jian
name: Cargile, Phillip A.
name: Ghezzi, Luan
name: De Lee, Nathan M.
name: Wisniewski, John
name: Gary, Bruce
name: de Mello, Gustavo F. Porto
name: Ferreira, Leticia
name: Zhao, Bo
name: Anderson, David R.
name: Wan, Xiaoke
name: Hellier, Coel
name: Guo, Pengcheng
name: West, Richard G.
name: Mahadevan, Suvrath
name: Pollacco, Don
name: Lee, Brian
name: Cameron, Andrew Collier
name: van Eyken, Julian C.
name: Skillen, Ian
name: Crepp, Justin R.
name: Nguyen, Duy Cuong
name: Kane, Stephen R.
name: Paegert, Martin
name: da Costa, Luiz Nicolaci
name: Maia, Marcio A. G.
name: Santiago, Basilio X.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Exoplanet transit and Doppler surveys discover many binary stars during their operation that can be used to conduct a variety of ancillary science. Specifically, eclipsing binary stars can be used to study the stellar mass-radius relationship and to test predictions of theoretical stellar evolution models. By cross-referencing 24 binary stars found in the MARVELS Pilot Project with SuperWASP photometry, we find two new eclipsing binaries, TYC 0272-00458-1 and TYC 1422-01328-1, which we use as case studies to develop a general approach to eclipsing binaries in survey data. TYC 0272-00458-1 is a single-lined spectroscopic binary for which we calculate a mass of the secondary and radii for both components using reasonable constraints on the primary mass through several different techniques. For a primary mass of M_1 = 0.92 +/- 0.1 M_solar, we find M_2 = 0.610 +/- 0.036 M_solar, R_1 = 0.932 +/- 0.076 R_solar and R_2 = 0.559 +/- 0.102 R_solar, and find that both stars have masses and radii consistent with model predictions. TYC 1422-01328-1 is a triple-component system for which we can directly measure the masses and radii of the eclipsing pair. We find that the eclipsing pair consists of an evolved primary star (M_1 = 1.163 +/- 0.034 M_solar, R_1 = 2.063 +/- 0.058 R_solar) and a G-type dwarf secondary (M_2 = 0.905 +/- 0.067 M_solar, R_2 = 0.887 +/- 0.037 R_solar). We provide the framework necessary to apply this analysis to much larger datasets.
description: Accepted for publication in AJ
Automated Redistricting Simulation Using Markov Chain Monte Carlo
Creators: name: Fifield, Benjamin
name: , Michael Higgins
name: Imai, Kosuke
name: Tarr, Alexander
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Molecular Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer

description: Legislative redistricting is a critical element of representative democracy. A number of political scientists have used simulation methods to sample redistricting plans under various constraints to assess their impact on partisanship and other aspects of representation. However, while many optimization algorithms have been proposed, surprisingly few simulation methods exist in the published scholarship. Furthermore, the standard algorithm has no theoretical justification, scales poorly, and is unable to incorporate fundamental constraints required by redistricting processes in the real world. To fill this gap, we formulate redistricting as a graph-cut problem and for the first time in the literature propose a new automated redistricting simulator based on Markov chain Monte Carlo. The proposed algorithm can incorporate contiguity and equal population constraints at the same time. We apply simulated and parallel tempering to improve the mixing of the resulting Markov chain. Through a small-scale validation study, we show that the proposed algorithm can approximate a target distribution more accurately than the standard algorithm. We also apply the proposed methodology to data from Pennsylvania to demonstrate the applicability of our algorithm to real-world redistricting problems. The open-source software package is available so that researchers and practitioners can implement the proposed methodology. Supplementary materials for this article are available online.
Oceanisphaera avium Sung & Kim & Lee & Kang & Kim & Hyun & Tak & Jung & Yun & Kim & Shin & Whon & Rho & Park & Shim & Bae 2018, SP. NOV.
Creators: name: Sung, Hojun
name: Kim, Hyun Sik
name: Lee, June-Young
name: Kang, Woorim
name: Kim, Pil Soo
name: Hyun, Dong-Wook
name: Tak, Euon Jung
name: Jung, Mi-Ja
name: Yun, Ji-Hyun
name: Kim, Min-Soo
name: Shin, Na-Ri
name: Whon, Tae Woong
name: Rho, Jeong Rae
name: Park, Sun Duk
name: Shim, Hyung Eun
name: Bae, Jin-Woo
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Bacteria
Proteobacteria
Gammaproteobacteria
Aeromonadales
Aeromonadaceae
Oceanisphaera
Oceanisphaera avium

description: DESCRIPTION OF OCEANISPHAERA AVIUM SP. NOV.
 Oceanisphaera avium sp. nov. (a′ vi.um. L. gen. pl. n. avium of birds).
 Strain AMac2203 T is a Gram-stain-negative, aerobic, catalase- and oxidase-positive, DNase-negative, rod-shaped, motile bacterial species. Growth occurs optimally at 15– 25 Ǫ C, at pH 7–8 and in the presence of 3–5 % (w/v) NaCl. Colonies are circular, smooth and beige in colour after incubation for 2 days at 20 Ǫ C on modified TYS agar. Strain AMac2203 T can hydrolyse aesculin and possesses catalase, oxidase, esterase (C4), esterase lipase (C8) and leucine arylamidase enzyme activities. Additionally, the isolate can assimilate D,L- lactic acid, pyruvic acid methyl ester, acetic acid, formic acid, succinic acid, bromosuccinic acid, L- alaninamide, D- alanine, L- alanine, L- asparagine, L- aspartic acid, L- glutamic acid, L- histidine, L- leucine, L- ornithine, L- phenylalanine, L- serine, L- threonine and malic acid. The predominant fatty acids are summed feature 3 (C 16: 0 Ɯ 7 c and/ or C 16: 1 Ɯ 6 c), summed feature 8 (C 18: 1 Ɯ 7 c) and C 16: 0. The predominant ubiquinone is Q-8, and polar lipids comprise phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, an unidentified amino lipid and an unidentified lipid. The OrthoANI value between strain AMac2203 T and O. profunda KCTC 32510 T is 77.5 %, and the genomic DNA G+C content of strain AMac2203 T is 47.1 mol%.
 The type strain, AMac2203 T (=KCTC 62118 T =JCM 32207 T), was isolated from the gut of the cinereous vulture, Aegypius monachus, from faecal samples collected at the Seoul Grand Park Zoo, Republic of Korea.
description: Published as part of Sung, Hojun, Kim, Hyun Sik, Lee, June-Young, Kang, Woorim, Kim, Pil Soo, Hyun, Dong-Wook, Tak, Euon Jung, Jung, Mi-Ja, Yun, Ji-Hyun, Kim, Min-Soo, Shin, Na-Ri, Whon, Tae Woong, Rho, Jeong Rae, Park, Sun Duk, Shim, Hyung Eun & Bae, Jin-Woo, 2018, Oceanisphaera avium sp. nov., isolated from the gut of the cinereous vulture, Aegypius monachus, pp. 2068-2073 in International Journal of Systematic and Evolutionary Microbiology 68 (6) on pages 2071-2072, DOI: 10.1099/ijsem.0.002797, http://zenodo.org/record/6223793