cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
IEEE Smart Grid''s 2019 Cybersecurity Workshop Presentations- Panel 5: Workforce
Creators: A P Meliopoulos
Luke Hebert
Amanda Joyce
Publisher: name: IEEE
Year: 2019

Slides for presentations disussed at IEEE Smart Grid's 2019 Workshop:  Session Panel 5 -Workforce
IEEE Smart Grid 2019 Cybersecurity Workshop Panel 5 - Workforce

Presentation Slides
A P Meliopoulos, PhD -Enabling and Integrating the Cybersecurity Features of DNP3
Luke Hebert, CEH-Cyber Engineering: Overview & Degree Program
Amanda Joyce -2019 Dept. of Energy�s CyberForce Competition
Comments on a paper by B.Schulz about Bell's inequalities
Creators: name: Schmelzer, I.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Schulz claims to have constructed an actively local stochastic theory which violates Bell's inequality. This is false.
Resistance fluctuations and Aharonov-Bohm-type oscillations in antidot arrays in the quantum Hall regime
Creators: name: Kato, Masanori
name: Endo, Akira
name: Katsumoto, Shingo
name: Iye, Yasuhiro
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Resistance fluctuation phenomenon in antidot lattices in the quantum Hall regime are studied. Magnetoresistance of finite antidot array systems in the quantum Hall plateau transition regime exhibits two types of oscillatory effect. One is the aperiodic resistance fluctuations (RFs) and the other is the Aharonov-Bohm (AB)-type oscillations. Their dependences on the magnetic field and the gate voltage are quite distinct. While the aperiodic RFs are attributed to the complex evolution of the conducting network of compressible channels, the AB-type oscillations are interpreted in terms of edge states formed around individual antidots. The self-consistent screening effect is important for the both phenomenon, whereas, the single electron charging effect plays a minor role in the present case.
description: 5 pages, 4 figures
Multi-modal Representation Learning for Video Advertisement Content Structuring
Creators: name: Guo, Daya
name: Zeng, Zhaoyang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Video advertisement content structuring aims to segment a given video advertisement and label each segment on various dimensions, such as presentation form, scene, and style. Different from real-life videos, video advertisements contain sufficient and useful multi-modal content like caption and speech, which provides crucial video semantics and would enhance the structuring process. In this paper, we propose a multi-modal encoder to learn multi-modal representation from video advertisements by interacting between video-audio and text. Based on multi-modal representation, we then apply Boundary-Matching Network to generate temporal proposals. To make the proposals more accurate, we refine generated proposals by scene-guided alignment and re-ranking. Finally, we incorporate proposal located embeddings into the introduced multi-modal encoder to capture temporal relationships between local features of each proposal and global features of the whole video for classification. Experimental results show that our method achieves significantly improvement compared with several baselines and Rank 1 on the task of Multi-modal Ads Video Understanding in ACM Multimedia 2021 Grand Challenge. Ablation study further shows that leveraging multi-modal content like caption and speech in video advertisements significantly improve the performance.
Entanglement signatures of quantum Hall phase transitions
Creators: name: Zozulya, Oleksandr
name: Haque, Masudul
name: Regnault, Nicolas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study quantum phase transitions involving fractional quantum Hall states, using numerical calculations of entanglements and related quantities. We tune finite-size wavefunctions on spherical geometries, by varying the interaction potential away from the Coulomb interaction. We uncover signatures of quantum phase transitions contained in the scaling behavior of the entropy of entanglement between two parts of the sphere. In addition to the entanglement entropy, we show that signatures of quantum phase transitions also appear in other aspects of the reduced density matrix of one part of the sphere.
description: 8 pages, 7 figures
Dirac-isotonic oscillators in (1 + 1) and (2 + 1) dimensions
Creators: name: Ghosh, Aritra
name: Mandal, Bhabani Prasad
Publisher: name: arXiv
Year: 2025
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We discuss the Dirac oscillator in $(1+1)$ and $(2+1)$ dimensions and generalize it in the spirit of the isotonic oscillator using supersymmetric quantum mechanics. In $(1+1)$ dimensions, the Dirac oscillator returns to the quantum harmonic oscillator in the non-relativistic limit, while its generalization maps to the isotonic oscillator. We describe exact solutions of these generalized systems and also present their non-relativistic limits. Finally, based on supersymmetric quantum mechanics, we show that a generalized Dirac oscillator in $(2+1)$ dimensions can be mapped to an anti-Jaynes-Cummings-like Hamiltonian in which the spin operators couple with the supercharges.
description: v1: Preliminary version; v2: Final version to appear in PLA
title: The Influence of Collective Action and Policy in the Development of Local Food Systems
Creators: name: Porreca, Lori
Publisher: name: Utah State University
Year: 2010

description: The modern global agrifood system has had significant negative impacts on consumers and producers. This has precipitated the rise of local food systems that are purported to improve the health and livelihoods of consumers and producers. High expectations have led to significant public and private resources dedicated to the development of local food systems. Despite this, there has been little systematic research exploring the social and institutional conditions that facilitate or frustrate local food system development. Using a comparative case study approach, this study explored the ways local structural conditions, collective action, food system policies, and the political context affect the development of local food systems. Findings suggested truly robust local food system development requires either collective action or public policies and are more likely to exist and be successful depending on the political climate and the balance of power between land use interests in the community.
Rare decays of the positronium ion and molecule, $\text{Ps}^{-}\to e^{-}γ$ and $\text{Ps}_{2}\to e^{+}e^{-}γ,~γγ,~e^{+}e^{-}$
Creators: name: Aslam, M. Jamil
name: Chen, Wen
name: Czarnecki, Andrzej
name: Mir, Samiur Rahman
name: Mubasher, Muhammad
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Decay rates of the positronium molecule $\text{Ps}_{2}$ into two photons and into an electron-positron pair are determined. Previous studies find that these rates are very different, \[ Γ\left(\text{Ps}_{2}\to e^{+}e^{-}\right)/Γ\left(\text{Ps}_{2}\toγγ\right)\simeq250\text{ (previous studies)}. \] This is puzzling since both processes have two body final states and are of the same order in the fine structure constant. We propose a simple calculational method and test it with the well-established decay of the positronium ion into an electron and a photon. We then employ it to correct predictions for both these $\text{Ps}_{2}$ decays. We find that previous studies overestimated the $e^{+}e^{-}$ and underestimated the $γγ$ channel by factors of about 5.44 and 3.93 respectively. Our results give $Γ\left(\text{Ps}_2\to e^+e^-\right)/Γ\left(\text{Ps}_2 \to γγ\right) \simeq 11.7$.
Asteroid shape inversion with light curves using deep learning
Creators: name: Tang, YiJun
name: Ying, ChenChen
name: Xia, ChengZhe
name: Zhang, XiaoMing
name: Jiang, XiaoJun
Publisher: name: arXiv
Year: 2025
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Asteroid shape inversion using photometric data has been a key area of study in planetary science and astronomical research.However, the current methods for asteroid shape inversion require extensive iterative calculations, making the process time-consuming and prone to becoming stuck in local optima. We directly established a mapping between photometric data and shape distribution through deep neural networks. In addition, we used 3D point clouds to represent asteroid shapes and utilized the deviation between the light curves of non-convex asteroids and their convex hulls to predict the concave areas of non-convex asteroids. We compared the results of different shape models using the Chamfer distance between traditional methods and ours and found that our method performs better, especially when handling special shapes. For the detection of concave areas on the convex hull, the intersection over union (IoU) of our predictions reached 0.89. We further validated this method using observational data from the Lowell Observatory to predict the convex shapes of the asteroids 3337 Milo and 1289 Kuta, and conducted light curve fitting experiments. The experimental results demonstrated the robustness and adaptability of the method
Cosmological Parallax--Distance Formula
Creators: name: Singal, Ashok K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The standard cosmological parallax--distance formula, as found in the literature, including text-books and reference books on cosmology, requires a correction. This correction stems from the fact that in the standard text-book derivation it has been ignored that any chosen baseline in a gravitationally bound system does not partake in the cosmological expansion. Though the correction is available in the literature for some time, the text-books still continue to use the older, incorrect formula, and its full implications are not yet fully realized. Apart from providing an alternate correct, closed-form expression that is more suitable and convenient for computations for certain limiting cases of FRW ($Λ=0$) world models, we also demonstrate how one can compute parallax distance for the currently favored flat-space accelerating-universe ($Λ>0, k=0$) cosmologies. Further, we show that the correction in parallax distance at large redshifts could amount to a factor of three or even more. Moreover, even in an infinite universe the parallax distance does not increase indefinitely with redshift and that even the farthest possible observable point may have a finite parallax angle, a factor that needs to be carefully taken into account when using distant objects as the background field against which the parallax of a foreground object is to be measured. Some other complications that could arise in parallax measurements of a distant source, like that due to the deflection of incoming light by the gravitation field of the Sun and other planetary bodies in the solar system, are pointed out.
description: 7 pages, 2 figures
The demand for site-specific recreational activities : a characterics approach
Creators: name: Morey, Edward Rockendorf
Publisher: name: University of British Columbia
Year: 2010

description: A model of constrained utility maximizing behaviour is developed to explain how a representative individual allocates his ski days amongst alternative sites. The physical characteristics of the ski areas and the individual's skiing ability are explicit arguments in the utility function; the budget allocation is given along with the parametric costs to ski (including travel costs, entrance fees, equipment costs and the opportunity cost of his time). Shares (a site's share being the proportion of ski days that the individual spends at that site) are derived and assumed multinomially distributed, a stochastic specification which maintains the inherent properties of the shares. Maximum likelihood estimation confirms the basic hypothesis that costs, ability and characteristics all are important determinants of the sites' shares.
Deliverable 2.1 Scheme for data collection
Creators: name: Couso, Digna
Publisher: name: Zenodo
Year: 2021
Subjects: open science, evaluation, RRI

description: Deliverable D2.1. includes information on the scheme to collect existing data that are relevant for 2 project tasks, one related to self-assessment among the participating RFPOs and the other to map current areas of interest regarding Open Science and RRI principles available in academic literature and performing a public surveys on perceptions of Open Science across Europe (a representative sample in six European countries).
IEEE Smart Grid''s 2019 Cybersecurity Workshop Presentations- Panel 1: Threats and Risks
Creators: Eric Byres
Marc DeNarie
Sam Chanoski
Publisher: name: IEEE
Year: 2019

Slides for presentations disussed at IEEE Smart Grid's 2019 Workshop:  Session Panel 1 -Threats and Risks
IEEE Smart Grid 2019 Cybersecurity Workshop Panel 1 - Threats and Risks

Presentation Slides

Eric Byres, P.Eng Creating an Ecosystem for Validating ICS Firmware

Marc Denarie, Cybersecurity Challenges and Solutions for DERs

Sam Chanoski, Latest from NERC's E-ISAC
title: Parallelization of Performance Limiting Routines in the Computational Fluid Dynamics General Notation System Library
Creators: name: Horne, Kyle
Publisher: name: Utah State University
Year: 2009

description: The Computational Fluid Dynamics General Notation System provides a unified way in which computational fluid dynamics data can be stored, but does not support the parallel I/O capabilities now available from version five of the Hierarchical Data Format library which serves as a back end for he standard. To resolve this deficiency, a new parallel extension library has been written and benchmarked for this work which can write files compliant with the standard using parallel file access modes. When using this new library, the write performance shows an increase of four-fold in some cases when compared to the same hardware operating in serial. Additionally, the use of parallel I/O allows much larger cases to be written since the problem is scattered across many nodes of a cluster, whose aggregate memory is much greater than that found on a single machine. These developments will allow computational fluid dynamics simulations to execute faster, since less time will be spent waiting for each time step to finish writing, as well prevent the need for lengthy reconstruction of data after the completion of a simulation.
Effect of atmospheric turbulence on propagation properties of optical vortices formed by using coherent laser beam arrays
Creators: name: Wang, Li-Gang
name: Zheng, Wei-Wei
name: Wang, Li-Qin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this paper, we consider the effect of the atmospheric turbulence on the propagation of optical vertex formed from the radial coherent laser beam array, with the initially well-defined phase distribution. The propagation formula of the radial coherent laser array passing through the turbulent atmosphere is analytically derived by using the extended Huygens-Fresnel diffraction integral. Based on the derived formula, the effect of the atmospheric turbulence on the propagation properties of such laser arrays has been studied in great detail. Our main results show that the atmospheric turbulence may result in the prohibition of the formation of the optical vortex or the disappearance of the formed optical vortex, which are very different from that in the free space. The formed optical vortex with the higher topological charge may propagate over a much longer distance in the moderate or weak turbulent atmosphere. After the sufficient long-distance atmospheric propagation, all the output beams (even with initially different phase distributions) finally lose the vortex property and gradually become the Gaussian-shaped beams, and in this case the output beams actually become incoherent light fields due to the decoherence effect of the turbulent atmosphere.
description: 10 pages, 5 figures
IEEE Smart Grid''s 2019 Cybersecurity Workshop Presentations- Panel 3: Supply Chain
Creators: Richard Brooks
Madhav Manjrekar
Gonda Lamberink
Publisher: name: IEEE
Year: 2019

Slides for presentations disussed at IEEE Smart Grid's 2019 Workshop:  Session Panel 3 -Supply Chain
IEEE Smart Grid 2019 Cybersecurity Workshop Panel 3 - Supply Chain

Presentation Slides
Richard Brooks- Verifying the Integrity and Authenticity of Software
Madhav Manjrekar- Trusted and Secure Hardware for DERs
Gonda Lamberink- IEC 62443 and Supplier Certification
Modeling conductive thermal transport in three-dimensional fibrous media with fiber-to-fiber contacts
Creators: name: Gaunand, Clémence
name: De Wilde, Yannick
name: François, Adrien
name: Grigorova-Moutiers, Veneta
name: Joulain, Karl
Publisher: name: arXiv
Year: 2025
Subjects: subject: Applied Physics (physics.app-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Understanding heat transfers in fibrous materials, particularly conduction, is a major challenge due to their heterogeneous and multiscale nature, and the unknown contribution of fiber-to-fiber contacts. In most previous modeling studies, the existence of thermal contact resistance is not considered, and the computational complexity limits the size of simulated samples, which often leads to imprecise or inaccurate predictions. The same problem arises when considering electrical conduction through fibrous materials. In this work, we describe a computationally efficient simulation approach based on multinodal representation to analyze the steady-state heat conduction through the solid structure in numerically generated three-dimensional nanofiber networks, including contact resistance. We show that the solid conductivity in these networks is governed by a master curve that depends on a single parameter: a characteristic ratio representing the interplay between the intrinsic fiber conductivity and contact resistance as well as the influence of other geometric parameters, which numerically validates previous theoretical studies. However, we observe a deviation to this established theory for poorly connected networks. We derive an expression for a correction factor, considering the influence of correlations between fiber temperatures, and we then find good agreement with our simulation data. Our results demonstrate that the solid conductivity can be fully predicted based on geometric quantities, regardless of the extent of network connectivity, thus generalizing previous studies on this topic. This work, contributing to improve our understanding of conductive heat transport in fibrous media, may prove useful in the development of accurate predictive models and optimization strategies for fibrous insulation materials.
description: 18 pages, 11 figures + Supplementary
title: Investigations of the Algal Productivity of Selected and Limited Sites Along the Western Shore of Bear Lake, Utah-Idaho
Creators: name: Sigler, John William
Publisher: name: Utah State University
Year: 1972

description: Investigations of limited and selected areas along the western shore of Bear Lake were carried out to determine the relative algal productivity with relation to nutrient concentrations and incident sunlight. The primary objective of the study was to determine the effects of nutrient changes in the littoral zone on the western shore on the algal productivity and to establish a baseline of data. Productivity estimates in this limited study indicate that at this time the littoral zone on the western shore of Bear Lake is generally unpolluted and quite oligotrophic.
Electromagnetic response of hot QCD medium in the presence of background time-varying fields
Creators: name: K, Gowthama K
name: Kurian, Manu
name: Chandra, Vinod
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The response of the hot QCD medium in the presence of external time dependent electromagnetic fields has been studied within the relativistic Boltzmann transport theory. The impact of the time dependence of the electromagnetic fields and collisional aspects of the medium to the induced electric and Hall current densities has been explored. The non-equilibrium momentum distribution of degrees of freedom has been obtained in the presence of space-time varying electromagnetic fields. Further, the analysis has been extended to an anisotropic QCD medium while incorporating the in-medium interaction effects. It is observed that the electric charge transport is sensitive to the inhomogeneity of the fields and the momentum anisotropy of the QCD medium.
description: 8 pages, 2 figures, two-column
When is there a representer theorem? Vector versus matrix regularizers
Creators: name: Argyriou, Andreas
name: Micchelli, Charles
name: Pontil, Massimiliano
Publisher: name: arXiv
Year: 2008
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: G.1.1; G.1.2; G.1.6; G.1.10; G.3; I.2.6

description: We consider a general class of regularization methods which learn a vector of parameters on the basis of linear measurements. It is well known that if the regularizer is a nondecreasing function of the inner product then the learned vector is a linear combination of the input data. This result, known as the {\em representer theorem}, is at the basis of kernel-based methods in machine learning. In this paper, we prove the necessity of the above condition, thereby completing the characterization of kernel methods based on regularization. We further extend our analysis to regularization methods which learn a matrix, a problem which is motivated by the application to multi-task learning. In this context, we study a more general representer theorem, which holds for a larger class of regularizers. We provide a necessary and sufficient condition for these class of matrix regularizers and highlight them with some concrete examples of practical importance. Our analysis uses basic principles from matrix theory, especially the useful notion of matrix nondecreasing function.
description: 22 pages 2 figures
Infinite series of time-dependent Dyson maps
Creators: name: Fring, Andreas
name: Tenney, Rebecca
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We propose and explore a scheme that leads to an infinite series of time- dependent Dyson maps which associate different Hermitian Hamiltonians to a uniquely specified time-dependent non-Hermitian Hamiltonian. We identify the underlying sym- metries responsible for this feature respected by various Lewis-Riesenfeld invariants. The latter are used to facilitate the explicit construction of the Dyson maps and metric oper- ators. As a concrete example for which the scheme is worked out in detail we present a two-dimensional system of oscillators that are coupled to each other in a non-Hermitian PT -symmetrical fashion
description: 16 pages
$A=4-7$ $Ξ$ hypernuclei based on interactions from chiral effective field theory
Creators: name: Le, Hoai
name: Haidenbauer, Johann
name: Meißner, Ulf-G.
name: Nogga, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the existence of bound $Ξ$ \break states in systems with $A=4-7$ baryons using the Jacobi NCSM approach in combination with chiral NN and $Ξ$N interactions. We find three shallow bound states for the NNN$Ξ$ system (with $(J^π,T)=(1^+,0)$, $(0^+,1)$ and $(1^+,1)$) with quite similar binding energies. The $^5_Ξ\mathrm{H}(\frac{1}{2}^+,\frac{1}{2})$ and $^7_Ξ\mathrm{H}(\frac{1}{2}^+,\frac{3}{2})$ hypernuclei are also clearly bound with respect to the thresholds $^4\mathrm{He} + Ξ$ and $^6\mathrm{He} +Ξ$, respectively. The binding of all these $Ξ$ systems is predominantly due to the attraction of the chiral $Ξ$N potential in the $^{33}S_1$ channel. A perturbative estimation suggests that the decay widths of all the observed states could be rather small.
description: 12 pages, 2 figures
Quantum interference between charge excitation paths in a solid state Mott insulator
Creators: name: Wall, S.
name: Brida, D.
name: Clark, S. R.
name: Ehrke, H. P.
name: Jaksch, D.
name: Ardavan, A.
name: Bonora, S.
name: Uemura, H.
name: Takahashi, Y.
name: Hasegawa, T.
name: Okamoto, H.
name: Cerullo, G.
name: Cavalleri, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The competition between electron localization and de-localization in Mott insulators underpins the physics of strongly-correlated electron systems. Photo-excitation, which re-distributes charge between sites, can control this many-body process on the ultrafast timescale. To date, time-resolved studies have been performed in solids in which other degrees of freedom, such as lattice, spin, or orbital excitations come into play. However, the underlying quantum dynamics of bare electronic excitations has remained out of reach. Quantum many-body dynamics have only been detected in the controlled environment of optical lattices where the dynamics are slower and lattice excitations are absent. By using nearly-single-cycle near-IR pulses, we have measured coherent electronic excitations in the organic salt ET-F2TCNQ, a prototypical one-dimensional Mott Insulator. After photo-excitation, a new resonance appears on the low-energy side of the Mott gap, which oscillates at 25 THz. Time-dependent simulations of the Mott-Hubbard Hamiltonian reproduce the oscillations, showing that electronic delocalization occurs through quantum interference between bound and ionized holon-doublon pairs.
description: 4 figures and supplementary information
IEEE Smart Grid''s 2019 Cybersecurity Workshop Presentations- Panel 6: Academic Research & NextGen Solutions
Creators: Dmitry Ishchenko Santiago Grijalva Mangaya Sivagnanam
Publisher: name: IEEE
Year: 2019

Slides for presentations disussed at IEEE Smart Grid's 2019 Workshop:  Session Panel 6 -Academic Research & NextGen Solutions
IEEE Smart Grid 2019 Cybersecurity Workshop Panel 6 - Academic Research & NextGen Solutions

Presentation Slides
Dmitry Ishchenko-Collaborative Defense of Transmission and Distribution Protection and Control Devices against Cyber Attacks (CODEF)
Santiago Grijalva-Cyber-Physical Security Assessments
Mangaya Sivagnanam-Next-Gen Solutions in Securing Smart Grids
Additional file 3 of Effects of cognitive ageing trajectories on multiple adverse outcomes among Chinese community-dwelling elderly population
Creators: name: Han, Chao
name: An, Jing
name: Chan, Piu
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mental Health
subject: Computational Biology

description: Additional file 3.
The low-mass YSO CB230-A: investigating the protostar and its jet with NIR spectroscopy and Spitzer observations
Creators: name: Massi, Fabrizio
name: Codella, Claudio
name: Brand, Jan
name: di Fabrizio, Luca
name: Wouterloot, Jan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A jet from the low-mass YSO CB230-A had been discovered in NIR narrow-band images. We aim to investigate the physical properties of the region from where the jet is launched. Our analysis was carried out using low-resolution NIR spectra acquired with the camera NICS at the TNG telescope, with JH and HK grisms and a 1 arcsec-wide slit. These observational data were complemented with infrared photometric data from the Spitzer space telescope archive. The relevant physical properties of CB230-A were constrained by SED fitting of fluxes from the NIR to the mm. The YSO spectrum exhibits a significant number of atomic and molecular emission and absorption features. The characteristics of this spectrum suggest that we are observing a region in the close vicinity of CB230-A, i. e. its photosphere and/or an active accretion disk. The spectra of the knots in the jet contain a large number of emission lines, including a rich set of [FeII] lines. Emission due to H2 and [FeII] are not spatially correlated, confirming that [FeII] and H2 are excited by different mechanisms, in agreement with the models where [FeII] traces dissociative J-shocks and molecular hydrogen traces slower C-shocks. By using intensity ratios involving density-sensitive [FeII] lines, we estimated the electron densities in the jet (6x10^3-1x10^4 cm^-3). This indicates either high density post-shock regions of ionised gas or regions with a high degree of ionisation. By combining the present data with previously obtained maps at NIR- and mm-wavelengths, the emerging scenario is that CB230-A is a Class 0/I YSO driving an atomic jet that is observed to be almost monopolar probably due to its inclination to the plane of the sky and the resulting higher extinction of its red side. This jet appears energetic enough to drive the molecular outflow observed in the mm.
description: 14 pages, 7 figures, accepted for publication in Astronomy and Astrophysics
Schwarzschild black hole levitating in the hyperextreme Kerr field
Creators: name: Manko, V. S.
name: Ruiz, E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The equilibrium configurations between a Schwarzschild black hole and a hyperextreme Kerr object are shown to be described by a three-parameter subfamily of the extended double-Kerr solution. For this subfamily, its Ernst potential and corresponding metric functions, we provide a physical representation which employs as arbitrary parameters the individual Komar masses and relative coordinate distance between the sources. The calculation of horizon's local angular velocity induced in the Schwarzschild black hole by the Kerr constituent yields a simple expression inversely proportional to the square of the distance parameter.
description: 6 pages, 1 figure; improved version
Utility Cybersecurity Workshop 2017 - Session 3
Creators: Bill Adams
Arthur Graves
Tobias Whitney
Tony Lee
Publisher: name: IEEE
Year: 2017

Slides: Session 3- Physical Security and Supply Chain - Best Practices and Standards
Slides presented at the IEEE SG Utility Cybersecurity Workshop in Atlanta, Georgia in December 2017 for Session 3: Physical Security and Supply Chain - Best Practices and Standards
Are Microwave Induced Zero Resistance States Necessarily Static?
Creators: name: Finkler, Ilya G.
name: Halperin, Bertrand I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the effect of inhomogeneities in Hall conductivity on the nature of the Zero Resistance States seen in the microwave irradiated two-dimensional electron systems in weak perpendicular magnetic fields, and we show that time-dependent domain patterns may emerge in some situations. For an annular Corbino geometry, with an equilibrium charge density that varies linearly with radius, we find a time-periodic non-equilibrium solution, which might be detected by a charge sensor, such as an SET. For a model on a torus, in addition to static domain patterns seen at high and low values of the equilibrium charge inhomogeneity, we find that, in the intermediate regime, a variety of nonstationary states can also exist. We catalog the possibilities we have seen in our simulations. Within a particular phenomenological model, we show that linearizing the nonlinear charge continuity equation about a particularly simple domain wall configuration and analyzing the eigenmodes allows us to estimate the periods of the solutions to the full nonlinear equation.
description: Submitted to PRB
Euclidean scalar Green functions near the black hole and black brane horizons
Creators: name: Haba, Z.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss approximations of the Riemannian geometry near the horizon. If a D+1 dimensional manifold N has a bifurcate Killing horizon then we approximate N by a product of the two-dimensional Rindler space and a D-1 dimensional Riemannian manifold M. We obtain approximate formulas for scalar Green functions. We study the behaviour of the Green functions near the horizon and their dimensional reduction. We show that if M is compact then the Green function near the horizon can be approximated by the Green function of a two-dimensional quantum field theory. The correction term is exponentially small away from the horizon. We extend the results to black brane solutions of supergravity in 10 and 11 dimensions. The near horizon geometry can be approximated by N=AdS_p x S_q. We discuss Euclidean Green functions on N and their behaviour near the horizon.
description: 19 pages,some misprints corrected
A Deep Neural Network Approach to Compact Source Removal
Creators: name: Madarász, M.
name: Marton, G.
name: Gezer, I.
name: Lehner, S.
name: Roquette, J.
name: Audard, M.
name: Hernandez, D.
name: Dionatos, O.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Analysing extended emission in photometric observations of star-forming regions requires maps free from compact foreground, embedded, and background sources, which can interfere with various techniques used to characterise the interstellar medium. Within the framework of the NEMESIS project, we apply machine learning techniques to improve our understanding of the star formation timescales, which involves the unbiased analysis of the extended emission in these regions. We present a deep learning-based method for separating the signals of compact sources and extended emission in photometric observations made by the Herschel Space Observatory, facilitating the analysis of extended emission and improving the photometry of compact sources. Central to our approach is a modified U-Net architecture with partial convolutional layers. This method enables effective source removal and background estimation across various flux densities, using a series of partial convolutional layers, batch normalisation, and ReLU activation layers within blocks. Our training process utilised simulated sources injected into Herschel images, with controlled flux densities against known backgrounds. A dynamic, signal-to-noise ratio-based adaptive masking system was implemented to assess how prominently a compact source stands out from the surrounding background. The results demonstrate that our method can significantly improve the photometric accuracy in the presence of highly fluctuating backgrounds. Moreover, the approach can preserve all characteristics of the images, including the noise properties. The presented approach allows users to analyse extended emission without the interference of disturbing point sources or perform more precise photometry of sources located in complex environments. We also provide a Python tool with tutorials and examples to help the community effectively utilise this method.
description: 23 pages, 13 figures, 10 tables, submitted to Astronomy&Astrophysics
title: Perceptions of Agriculture Teachers Toward Including Students with Disabilities
Creators: name: Giffing, Monica D
Publisher: name: Utah State University
Year: 2009

description: The inclusion of students with special needs in regular education classrooms has been required by federal law for more than three decades. However, much of the responsibility for successful accommodation of students with disabilities rests upon the shoulders of teachers. Previous research has indicated that successful inclusion of students with special needs is strongly influenced by the attitude of teachers involved. In this study, all secondary agriculture teachers in Utah were surveyed to determine their attitudes and perceptions related to their willingness and ability to include students with special needs in their classrooms and laboratories. Selected personal and professional characteristics were correlated with these attitudes and perceptions. A large majority of teachers responded that they understand the concept of inclusion, are in favor of including students with disabilities, and have had a positive experience teaching students with special needs. However, fewer respondents indicated that they had the skill level to successfully include students with disabilities. Overall, while teachers indicated willingness to include the students with most of the specific types of disabilities, they were less positive in their perceived abilities to successfully accommodate students with some specific categories of special needs.
Possible modification to standard cosmological model to resolve tension with Hubble constant values
Creators: name: Parnovsky, S. L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The tensions between the values of Hubble constant obtained from the early and the late Universe data pose a significant challenge to modern cosmology. Possible modifications of the flat homogeneous isotropic cosmological ΛCDM model are considered, in which the Universe contains dark energy, cold baryonic matter and dark matter. They are based on general relativity and satisfy two requirements: (1) the value of the Hubble constant, calculated from the value of the Hubble parameter at the recombination by the formulas of flat ΛCDM model, should be equal to 92% of the one based on low-reshift observations; (2) deviations from the ΛCDM model should not lead to effects that contradict astronomical observations and estimations obtained thereof. The analysis showed that there are few opportunities for choice. Either we should consider DM with negative pressure -\r{ho}_{dm}c^2<
description: 6 pages
Utility Cybersecurity Workshop 2017 - Keynote, Sessions  4 & 5
Creators: Sam Chanoski
Andrian Ownens
Dan Rueckert
Joe Doetzl
David DeFalaise
David Batz
Carol Hawk
Publisher: name: IEEE
Year: 2017

Slides: Keynote, Session 4- Security Conscious Software Development, Session 5- Policy Issues
Slides presented at the IEEE SG Utility Cybersecurity Workshop in Atlanta, Georgia in December 2017 for Keynote, Session  4: Security Conscious Software Development and Session 5: Policy Issues
X-ray and CO-Derived Column Densities in AGN: A Study of Obscuration Properties in CTAGN and Non-CTAGN
Creators: name: Musa, M. L. H.
name: Abidin, Z. Z.
name: Annuar, A.
name: Lee, D. A. A.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: J.2; I.6.6; G.3
subject: 85A04 - General astronomy and astrophysics 85A05 - Galactic and stellar dynamics 85A15 - Galactic and planetary physics 85A35 - Statistical astronomy

description: Obscuration in active galactic nuclei (AGN) provides insights into the material surrounding the central engine. Compton-thick AGN (CTAGN), characterized by a column density of $N_{\mathrm{H}} \geq 1.5 \times 10^{24} \ \mathrm{cm}^{-2}$, are heavily obscured by dust and gas. While X-ray observations primarily determine this column density, the sub-mm obscuration properties of CTAGN remain less explored. We analyze archival ALMA CO(3-2) data for CTAGN and non-CTAGN from the 70-month $\textit{Swift}$/BAT catalog and other X-ray surveys. Integrated intensity maps (moment 0) reveal dense gas concentrated around the nucleus. Assuming a constant CO-to-$\mathrm{H_2}$ conversion factor, $X_{\mathrm{CO}} = 2.2 \times 10^{20} \ \mathrm{cm}^{-2} \ (\mathrm{K\ km\ s}^{-1})^{-1}$, we find that molecular hydrogen column densities ($N_{\mathrm{H_2}}$) are generally lower than X-ray-derived total hydrogen column densities ($N_{\mathrm{H}}$). However, $N_{\mathrm{H_2}}$ values in this work are slightly higher than in previous studies due to the adopted conversion factor. The discrepancy between $N_{\mathrm{H}}$ and $N_{\mathrm{H_2}}$ aligns with prior findings that X-ray-derived values tend to be higher, except for non-CTAGN, where $N_{\mathrm{H_2}}$ can exceed $N_{\mathrm{H}}$. Kendall and Spearman tests indicate a positive monotonic correlation, though not statistically significant, suggesting a complex interplay of factors. The optically thick nature of CO in dense regions may contribute to the observed differences. Our results highlight the need for an accurate CO-to-$\mathrm{H_2}$ conversion factor in deriving column densities, potentially offering an alternative method for identifying CTAGN. Future studies with larger datasets and refined methodologies are essential for a deeper understanding of sub-mm and X-ray properties in AGN.
description: This paper has been accepted for publication in PASA
First test of $O(α^{2})$ correction of the orthopositronium decay rate
Creators: name: Kataoka, Y.
name: Asai, S.
name: Kobayashi, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Positronium is an ideal system for the research of the bound state QED. New precise measurement of orthopositronium decay rate has been performed with an accuracy of 150 ppm. This result is consistent with the last three results and also the 2nd order correction. The result combined with the last three is 7.0401$\pm0.0007μ\mathrm{sec}^{-1}$ (100 ppm), which is consistent with the 2nd order correction and differs from the 1st order calculation by 2.6$σ$ It is the first test to validate the 2nd order correction.
description: will be submitted to Phys. Lett. B
Anna Maria Lorusso – Claudio Paolucci – Patrizia Violi (eds.), Narratività. Problemi, analisi, prospettive
Creators: name: Mondino, Marco
Publisher: name: Università degli Studi di Cagliari
Year: 2014

description: La semiotica ha condotto la sua ricerca su forme testuali diverse considerando la narratività come il principio organizzatore di qualsiasi tipo di discorso e come vera e propria ipotesi interpretativa della cultura in generale. Un romanzo, una pubblicità, un’immagine, una città, una fotografia, una campagna di marketing, costituiscono vere e proprie configurazioni di senso che si manifestano attraverso diverse sostanze espressive e possono essere studiate come veri e propri testi analizzandone i modi di funzionamento, le stratificazione, le trasformazioni interne e le traduzioni in testi ulteriori. Non si tratta di una mera applicazione di una griglia teorica ad oggetti diversi, con il rischio di leggere indifferentemente le stesse cose ovunque, critica che è stata spesso mossa alla semiotica, piuttosto siamo in presenza di uno sguardo analitico in grado di costruire ipotesi interpretative proprio a partire dalla nozione di narratività che rappresenta il modo attraverso cui la semiotica arriva a concettualizzare il senso. La semiotica è per sua natura comparativa e trasversale e la sua specificità consiste nel guardare ad oggetti diversi facendone emergere di volta in volta le regole di funzionamento.
description: Between, Vol 4, N° 7 (2014): Poteri della retorica
Extracting Einstein from the Loop-Level Double-Copy
Creators: name: Carrasco, John Joseph M.
name: Vazquez-Holm, Ingrid A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The naive double-copy of (multi) loop amplitudes involving massive matter coupled to gauge theories will generically produce amplitudes in a gravitational theory that contains additional contributions from propagating antisymmetric tensor and dilaton states even at tree-level. We present a graph-based approach that combines the method of maximal cuts with double-copy construction to offer a systematic framework to isolate the pure Einstein-Hilbert gravitational contributions through loop level. Indeed this allows for a bootstrap of pure-gravitational results from the double-copy of massive scalar-QCD. We apply this to construct the novel result of the D-dimensional one-loop five-point QFT integrand relevant in the classical limit to generating observables associated with the radiative effects of massive black-hole scattering via pure Einstein-Hilbert gravity.
description: 33 pages, 9 figures
Bounds on the Speedup in Quantum signalling
Creators: name: Arrighi, Pablo
name: Nesme, Vincent
name: Werner, Reinhard
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 81P45, 37B10, 94A40

description: Given a discrete reversible dynamics, we can define a quantum dynamics, which acts on basis states like the classical one, but also allows for superpositions of them. It is a curious fact that in the quantum version, local changes in the initial state, after a single dynamical step, can sometimes can be detected much farther away than classically. Here we show that this effect is no use for generating faster signals. In a run of many steps the quantum propagation neighborhood can only increase by a constant fringe, so there is no asymptotic increase in speed.
description: 22 pages, 9 figures
IEEE Smart Grid''s 2019 Cybersecurity Workshop Presentations- Panel 4: Technical & Regulatory Standards
Creators: Andrew West
Danish Saleem
Alekhya Avadhandula
Publisher: name: IEEE
Year: 2019

Slides for presentations disussed at IEEE Smart Grid's 2019 Workshop:  Session Panel 4 -Technical & Regulatory Standards
IEEE Smart Grid 2019 Cybersecurity Workshop Panel 4 - Technical & Regulatory Standards

Presentation Slides
Andrew West- Creating an Ecosystem for Validating ICS Firmware
Danish Saleem- Cybersecurity Challenges and Solutions for DERs
Alekhya Avadhanula, Tobias Whitney- Using Cloud Service Provides While Navigating the NERC-CIP Standards