cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Physical Origin of Schrödinger Equation
Creators: name: Yan, Xiao-Bo
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Quantum mechanics is one of the basic theories of modern physics. Here, the famous Schrödinger equation and the differential operators representing mechanical quantities in quantum mechanics are derived, just based on the principle that the translation invariance (symmetry) of a system in Hamiltonian mechanics should be preserved in quantum mechanics. Moreover, according to the form of the differential operators, the commutation relation in quantum mechanics between the generalized coordinate and the generalized momentum can be directly obtained. We believe that the results in this paper are very useful for understanding the physical origin of quantum mechanics.
Ground States of Heisenberg Spin Clusters from Projected Hartree-Fock Theory
Creators: name: Tabrizi, Shadan Ghassemi
name: Jiménez-Hoyos, Carlos A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We apply Projected Hartree-Fock theory (PHF) for approximating ground states of Heisenberg spin clusters. Spin-rotational, point-group and complex-conjugation symmetry are variationally restored from a broken-symmetry mean-field reference, where the latter corresponds to a product of local spin states. A fermionic formulation of the Heisenberg model furnishes a conceptual connection to PHF applications in quantum chemistry and detailed equations for a self-consistent field optimization of the reference state are provided. Different PHF variants are benchmarked for ground-state energies and spin-pair correlation functions of antiferromagnetic spin rings and three different polyhedra, with various values of the local spin-quantum number s. The low computational cost and the compact wave-function representation make PHF a promising complement to existing approaches for ground states of molecular spin clusters, particularly for large s and moderately large N. The present work may also motivate future explorations of more accurate post-PHF methods for Heisenberg spin clusters.
2/19 Plenary Panel Session: Customer Analytics and Behind the Meter Technologies, Track 1: Customer Analytics and Behind the Meter Technologies
Creators: M. Kuzlu
C. Burks
F. Rahimi
C. Lima
B. Williams
M. Wakefield
K. Morua
Publisher: name: IEEE
Year: 2020

2020 PES ISGT NA Panel Sessions from Feb. 19th, Track 1 - Customer Analytics and Behind the Meter Technologies
This product contains the following Feb. 19th panel sessions from Track 1 - Customer Analytics and Behind the Meter Technologies

Educational and Research Aspects of Blockchain in Power Systems
By: M. Kuzlu, Old Dominion University

Disrupting the Status Quo: Digitalization of the Natural Gas Trading Supply Chain
By: C. Burks, Big Data Energy Services

Blockchain-as-a-Service in Transactive Energy Systems
By: F. Rahimi, OATI

IEEE Blockchain in Energy: Creating a New Open Blockchain Energy Standards
By: C. Lima, IEEE Standards Association

The Customer and Community Centric Grid
By: B. Williams, Oracle Utilities

Enabling Technologies� the strategic infrastructure to enable digital transformation of smart, resilient cities
By: M. Wakefield, Electric Power Research Institute

Smart Communities and Villages: Building Smart, Resilient and Sustainable Hubs
By: K. Morua, Morua Power
2/19 Plenary Panel Session: Distribution and Transmission Planning for the Grid of the Future, Track 3: Distribution and Transmission Planning for the Grid of the Future
Creators: D. Forfia
R. Concepcion
J. Gentle
J. Smith
J. Twitchell
S. Laval
Publisher: name: IEEE
Year: 2020

2020 PES ISGT NA Panel Sessions from Feb. 19th, Track 3 - Distribution and Transmission Planning for the Grid of the Future
This product contains the following Feb. 19th panel sessions from Track 3 � Distribution and Transmission Planning for the Grid of the Future

Grid Architectures: Linking the Conceptual to Implementation
By: D. Forfia, Electric Reliability Council of Texas

Energy Storage Evaluation for Grid and Customer Services
By: R. Concepcion, Sandia National Laboratories

Microgrids, Infrastructure Resilience, and Advanced Controls Launchpad
By: J. Gentle, Idaho National Laboratory

Reliability, Resilience and Renewables
By: J. Smith, ESIG

Energy Storage in Integrated Resource Plans
By: J. Twitchell (PNNL)

Enabling Grid Interoperability via Open Field Message Bus (OpenFMB)
By: S. Laval (Duke Energy)
Mechanisms of excitation and inhibition in the nigrostriatal system
Creators: name: Richardson, Thomas L.
Publisher: name: University of British Columbia
Year: 2010

description: The extracellular responses of neurons in the corpus striatum following single pulse stimulation of the substantia nigra or dorsal raphe nucleus were investigated in urethane anaesthetized rats, nigral stimulation at low intensities (10 v) evoked single large amplitude spikes while higher intensities (10 to 20 v) evoked, in addition, a high frequency burst of small amplitude spikes or waves. Spontaneous large spikes, or those induced by the administration of glutamate, were inhibited by nigral stimulation. The onset of inhibition coincided with the onset of the burst. If the burst was prevented, inhibition no longer occurred. Neither the inhibitory nor the burst response evoked by nigral stimulation was influenced by iontophoretically or systemically administered antagonists of dopamine or by chemical lesions of the dopaminergic neurons of the nigrostriatal pathway. However the excitation of large units by nigral stimulation was reversibly blocked by dopamine antagonists. Stimulation of the dorsal raphe nucleus produced inhibition of spontaneously active striatal neurons. No excitatory response was ever observed. HEP injected into the striatum was transported to cells in the dorsal raphe nucleus and injection of tritiated leucine into the dorsal raphe nucleus produced significant transport of radio labelled protein to the caudate nucleus. It is concluded that the burst response is produced by excitation of striatal interneurons through collaterals of the striatonigral pathway which are intrinsic to the nucleus. Nigral stimulation causes an antidromic activation of the axon and a subsequent orthodromic activation of its collaterals. The interneurons activated by this "axon reflex" are inhibitory in function. It is further concluded that the dopaminergic neurons of the nigrostriatal tract make excitatory synaptic contact with striatal neurons in the central region of the nucleus. At least some of these target neurons project, in turn, to the globus pallidus.
2/18 Plenary Panel Session: Distribution and Transmission Planning for the Grid of the Future, Track 3: Distribution and Transmission Planning for the Grid of the Future
Creators: C. Liu
J. Hong
Z. Yi
L. He
R. Nuqui
H. Mantooth
F. Rengifo
F. Qiu
K. Tomsovic
Q. Zhang
Publisher: name: IEEE
Year: 2020

2020 PES ISGT NA Panel Sessions from Feb. 18th, Track 3 - Distribution and Transmission Planning for the Grid of the Future
This product contains the following Feb. 18th panel sessions from Track 3 - Distribution and Transmission Planning for the Grid of the Future

Cost-Effective Provision Grid Services from Demand-side Assets: Cyber Attack on Smart Inverters and Wind Generators
By: C. Liu, Virginia Tech

Cybersecurity of High Power EV Charging Station
By: J. Hong, University of Michigan-Dearborn

Blockchain and IoT Enabled P2P Energy Trading Framework
By: Z. Yi, GEIRI North America

Non-black-box Online Modeling of HVDC for Real-time Security Detection
By: L. He, University of Illinois at Chicago

Reinforcing Cyber Resiliency of Power Systems with Embedded HVDC
By: R. Nuqui, ABB Power Grids Research

Cybersecurity for Sustainable Energy Systems
By: H. Mantooth, University of Arkansas

Microgrids and Hurricanes: A Perspective from Puerto Rico
By: F. Rengifo, University of Puerto Rico

An Electricity Grid Resilience Improvement Program (EGRIP)
By: F. Qiu, ANL

TF on Methods for Analysis and Quantification of Power System Resilience
By: K. Tomsovic, University of Tennessee

Data-Driven Resilience Modeling in Distribution Grid
By: Z. Wang, Iowa State University
Dynamic Long-distance Coupling of Smart Grid Research Infrastructure, Models, and Laboratories for Distributed Real-Time Assessment of Cyber-Physical Energy Systems
Creators: A. Van Der Meer
A. Monti
P. Koralewicz
T. Strasser
Publisher: name: IEEE
Year: 2018

2018 PES GM Panel Presentation
Dynamic Long-distance Coupling of Smart Grid Research Infrastructure, Models, and Laboratories for Distributed Real-Time Assessment of Cyber-Physical Energy Systems
2/20 Plenary Panel Session: Customer Analytics and Behind the Meter Technologies, Track 1: Customer Analytics and Behind the Meter Technologies
Creators: A. Khurram
D. Vrabie
B. Enayati
Y. Zhang
Z. Wang
A. Pahwa
R. Yang
F. Rahimi
R. Yao
Publisher: name: IEEE
Year: 2020

2020 PES ISGT NA Panel Sessions from Feb. 20th, Track 1 - Customer Analytics and Behind the Meter Technologies
This product contains the following Feb. 20th panel sessions from Track 1 - Customer Analytics and Behind the Meter Technologies

Innovative methods in coordinating demand-side resources: From papers to practice
By: Adil Khurram, University of Vermont

Leveraging Differentiable Programming for Adaptive Resilient Systems
By: D. Vrabie, PNNL

The role of communications on properly managing the impacts of DER on system operations, protection, and planning
By: B. Enayati, National Grid

Approximating Trajectory Constraints with Machine Learning � Microgrid Islanding with Frequency Constraints
By: Y. Zhang, ANL

Learning Smart Meter Data for Enhancing Distribution Grid Observability
By: Z. Wang, Iowa State University

Machine Learning Efforts at the National Science Foundation
By: A. Pahwa, EPCN

Predictive Analytics for Behind-the-Meter Resources
By: R. Yang, National Renewable Energy Laboratory

Economic, Reliability, and Resilience Considerations for TE Systems
By: F. Rahimi, OATI

Modeling and Prediction of Weather-induced Outages Using Neural Networks
By: R. Yao, ANL
Comparative habitats of, and competition between, the long-billed marsh wren and the red-winged blackbird at Pitt Meadows, British Columbia
Creators: name: Runyan, Craig Steven
Publisher: name: University of British Columbia
Year: 2010

description: The objectives of the study were to determine the year-round distribution and habitat selection of four marsh passerine species, as described by vegetation type and its physical characteristics, and to investigate interspecific competition as a factor in the habitat selection of the Long-billed Marsh Wren and the Red-winged Blackbird. Fulfillment of these objectives should help the B.C. Fish and Wildlife Branch to assess the effects of their management plans on marsh passerines. I determined the abundance of four passerine species in different vegetation types via marsh census transects over the period of one year. Nesting habitat and breeding information on marsh wrens and redwings was obtained via nest study plots. The results were: Areas traversed from the central and deepest marsh outward towards higher ground are inhabited by redwings, marsh wrens. Common Yellowthroats, and Song Sparrows, respectively. Habitats of wrens and redwings are spatially and temporally segregated. Wrens use the "Dense Spiraea" (Hardhack shrub) habitat extensively, while redwings use it hardly at all in the marsh. Similarly, redwings are abundant in Scirpus cyperinus (Hairy-seeded Bulrush), whereas wrens seldom use this habitat. Both wrens and redwings use other vegetation types, but redwings use them in the late spring, whereas wrens use them in the summer. Both wrens and redwings have lower reproductive success when nesting in close proximity than when nesting apart. This supports the hypothesis that interspecific competition exists and indicates that selection may favour habitat segregation. I also found mutual suppression of reproductive success when the effects of different vegetation types were removed. The results were not statistically significant however, possibly due to small sample sizes. Of the observed differences between the physical nest site parameters of wrens and redwings, vegetation height and presence and/or depth of water require further investigation as factors in the habitat selection of the two species. Bren-wren competition does not appear to affect wren nesting success in the present study marsh. Management recommendations are given based on the objective of maintaining and possibly enhancing bird species diversity in the study marsh.
2/19 Plenary Panel Session: Distribution and Transmission Operation for the Grid of the Future, Track 2: Distribution and Transmission Operation for the Grid of the Future
Creators: X. Lu
P. Etingov
Y. Sharon
G. Yuan
Z. Sharp
M. Sarmin
M. Hong
S. Ghosh
D. Holmberg
R. Kaiser
V. Mehr
Publisher: name: IEEE
Year: 2020

2020 PES ISGT NA Panel Sessions from Feb. 19th, Track 2 - Distribution and Transmission Operation for the Grid of the Future
This product contains the following Feb. 19th panel sessions from Track 2 � Distribution and Transmission Operation for the Grid of the Future

Resilient and Reconfigurable Distribution Systems with Inverter Dominated and Cross-layer Dynamic Microgrids
By: X. Lu, Temple University

Synchrophasor-based Open Source Tools to Strengthen Grid Resilience and Reliability
By: P. Etingov, PNNL

Incorporating DERs within Restoration Schemes for Distribution Systems
By: Y. Sharon, S&C Electric Company

DOE Solar Grid Integration Research
By: G. Yuan, DOE Solar Energy Technologies Office

SPP�s Use of Topology Optimization in Real Time Operations
By: Z. Sharp, Southwest Power Pool

Reimagining TNB�s Grid of the Future
By: M. Sarmin, TNB Malaysia

Situational Awareness of the Weather Impact on Power System Operation
By: M. Hong, ISO New England

EV Grid Integration: Pass Cars and Commercial Fleets
By: S. Ghosh, NREL

EV Fleet Charging: Managing Power Flows Today and Tomorrow
By: D. Holmberg, NIST

An Energy Services Interface (ESI) for EV Managed Charging
By: R. Kaiser, Amzur Technologies

Distribution Grid Operation Utility Practice and Field Applications
By: V. Mehr, Southern California Edison
A modal description of paraxial structured light propagation
Creators: name: Sroor, Hend
name: Moodley, Chane
name: Rodrıguez-Fajardo, Valeria
name: Zhan, Qiwen
name: Forbes, Andrew
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Here we outline a description of paraxial light propagation from a modal perspective. By decomposing the initial transverse field into a spatial basis whose elements have known and analytical propagation characteristics, we are able to analytically propagate any desired field, making the calculation fast and easy. By selecting a basis other than that of planes waves, we overcome the problem of numerical artefacts in the angular spectrum approach and at the same time are able to offer an intuitive understanding for why certain classes of fields propagate as they do. We outline the concept theoretically, compare it to the numerical angular spectrum approach, and confirm its veracity experimentally using a range of instructive examples. We believe that this modal approach to propagating light will be a useful addition to toolbox for propagating optical fields.
Lower Inertia and Weaker Grids
Creators: N. Miller
L. Rouco
E. Nobile
D. Ramasubramanian
J. Schmall
A. Schwanka
R. Thornton-Jones
Publisher: name: IEEE
Year: 2018

2018 PES GM Panel Presentation
Managing grid reliability. Management of grid frequency and introduction of frequency response from inverter-based generation. New sources of inertia. Stability of Controls and effectiveness of protection schemes for lower fault currents. Dynamic control of the transmission and distribution grids
2/20 Keynote and Plenary Session: Success Factors on the Path to the Smart Grid, Keynote and Plenary Session: Success Factors on the Path to the Smart Grid
Creators: J. Aguero
M. Pesin
T. Pierpoint
J. Liu
M. Blaise
Publisher: name: IEEE
Year: 2020

2020 PES ISGT NA Keynote and Plenary Session from Feb. 20th, Keynote and Plenary Session - Success Factors on the Path to the Smart Grid
This product contains the following Feb. 20th keynote and plenary sessions from Keynote and Plenary Sessions - Success Factors on the Path to the Smart Grid

DER Readiness - Planning/Operations Convergence & The Grid of the Future
By: J. Aguero, Quanta Technology

Driving Resilience in a Modernized Grid
By: M. Pesin, U.S. Department of Energy

Planning for Extreme Weather Events: A Utility Perspective
By: T. Pierpoint, Austin Energy

IEEE-NERC JOC Activity Review
By: J. Liu, PJM Interconnection LLC

The Power to Unite: Corporate Engagement with IEEE PES
By: M. Blaise, ComEd
Towards Robust Constraints on Axion Dark Matter using PSR J1745-2900
Creators: name: Battye, R. A.
name: Darling, J.
name: McDonald, J.
name: Srinivasan, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We apply novel, recently developed plasma ray-tracing techniques to model the propagation of radio photons produced by axion dark matter in neutron star magnetospheres and combine this with both archival and new data for the galactic centre magnetar PSR J1745-2900. The emission direction to the observer and the magnetic orientation are not constrained for this object leading to parametric uncertainty. Our analysis reveals that ray-tracing greatly reduces the signal sensitivity to this uncertainty, contrary to previous calculations where there was no emission at all in some directions. Based on a Goldreich-Julian model for the magnetosphere and a Navarro-Frank-White model for axion density in the galactic centre, we obtain the most robust limits on the axion-photon coupling, to date. These are comparable to those from the CAST solar axion experiment in the mass range $\sim 4.2-60\,μ{\rm eV}$. If the dark matter density is larger, as might predicted by a "spike" model, the limits could be much stronger. The dark matter density in the region of the galactic centre is now the biggest uncertainty in these calculations.
description: 5 pages Comments welcome
title: Front Matter, Table of Contents, Preface, List of Authors
Creators: name: Bonchi, Filippo
name: König, Barbara
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2017
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: List of Authors

description: Front Matter, Table of Contents, Preface, List of Authors
description: LIPIcs, Vol. 72, 7th Conference on Algebra and Coalgebra in Computer Science (CALCO 2017), pages 0:i-0:x
Cooper quartet correlations in infinite symmetric nuclear matter
Creators: name: Guo, Yixin
name: Tajima, Hiroyuki
name: Liang, Haozhao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the quartet correlations in four-component fermionic systems at the thermodynamic limit within a variational many-body theory. The Bardeen-Cooper-Schrieffer (BCS)-type variational wave function is extended to the systems with the coexistence of pair and quartet correlations at zero temperature. Special attention is paid to the application of the present framework to an alpha-particle condensation in symmetric nuclear matter, where the coexistence of deuteron and alpha condensations is anticipated. We also discuss how physical properties, such as quasiparticle dispersion, can be modified by the pair and quartet correlations and show a hierarchical structure of in-medium cluster formations in infinite nuclear matter. The present results may also contribute to the interdisciplinary understanding of fermionic condensations beyond the BCS paradigm in many-body systems.
description: 11 pages, 2 figures
Temperature Measurements of Liquid Flat Jets in Vacuum
Creators: name: Chang, Yi-Ping
name: Yin, Zhong
name: Balciunas, Tadas
name: Worner, Hans Jakob
name: Wolf, Jean-Pierre
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Sub-μm thin samples are essential for spectroscopic purposes. The development of flat micro-jets enabled novel spectroscopic and scattering methods for investigating molecular systems in the liquid phase. However characterization of the temperature of these ultra-thin liquid sheets in vacuum has not been systematically investigated. Here we present a comprehensive temperature characterization of two methods producing sub-micron flatjets, using optical Raman spectroscopy: colliding of two cylindrical jets and a cylindrical jet compressed by a high pressure gas. Our results reveal the dependence of the cooling rate on the material properties and the source characteristics, i.e. nozzle orifice size,flowrate, pressure. We show that materials with higher vapour pressures exhibit faster cooling rates which is illustrated by comparing the temperature profile of liquid water and ethanol flatjets. In a sub-μm liquid sheet, the temperature of the water sample reaches around 268 K and the ethanol around 253 K.
Electrical Resistivity and Specific Heat of EuFe2As2 Single Crystals: Magnetic homologue of SrFe2As2
Creators: name: Jeevan, H. S.
name: Hossain, Z.
name: Kasinathan, Deepa
name: Rosner, H.
name: Geibel, C.
name: Gegenwart, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We have grown single crystals of EuFe2As2 and investigated its electrical transport and thermodynamic properties. Electrical resistivity and specific heat measurements clearly establish the intrinsic nature of magnetic phase transitions at 20 K and 195 K. While the high temperature phase transition is associated with the itinerant moment of Fe, the low temperature phase transition is due to magnetic order of localized Eu-moments. Band structure calculations point out a very close similarity of the electronic structure with SrFe2As2. Magnetically, the Eu and Fe2As2 sublattice are nearly de-coupled.
Testing the predictions of axisymmetric distribution functions of galactic dark matter with hydrodynamical simulations
Creators: name: Petač, Mihael
name: Lavalle, Julien
name: Núñez-Castiñeyra, Arturo
name: Nezri, Emmanuel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Signal predictions for galactic dark matter (DM) searches often rely on assumptions on the DM phase-space distribution function (DF) in halos. This applies to both particle (e.g. $p$-wave suppressed or Sommerfeld-enhanced annihilation, scattering off atoms, etc.) and macroscopic DM candidates (e.g. microlensing of primordial black holes). As experiments and observations improve in precision, better assessing theoretical uncertainties becomes pressing in the prospect of deriving reliable constraints on DM candidates or trustworthy hints for detection. Most reliable predictions of DFs in halos are based on solving the steady-state collisionless Boltzmann equation (e.g. Eddington-like inversions, action-angle methods, etc.) consistently with observational constraints. One can do so starting from maximal symmetries and a minimal set of degrees of freedom, and then increasing complexity. Key issues are then whether adding complexity, which is computationally costy, improves predictions, and if so where to stop. Clues can be obtained by making predictions for zoomed-in hydrodynamical cosmological simulations in which one can access the true (coarse-grained) phase-space information. Here, we test an axisymmetric extension of the Eddington inversion to predict the full DM DF from its density profile and the total gravitational potential of the system. This permits to go beyond spherical symmetry, and is a priori well suited for spiral galaxies. We show that axisymmetry does not necessarily improve over spherical symmetry because the (observationally unconstrained) angular momentum of the DM halo is not generically aligned with the baryonic one. Theoretical errors are similar to those of the Eddington inversion though, at the 10-20% level for velocity-dependent predictions related to particle DM searches in spiral galaxies. We extensively describe the approach and comment on the results.
description: 44 pages, 26 figures, 2 tables. Comments are welcome
A note on the Gaffney Laplacian on infinite metric graphs
Creators: name: Kostenko, Aleksey
name: Nicolussi, Noema
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: Primary 34B45, Secondary 47B25, 81Q10

description: We show that the deficiency indices of the minimal Gaffney Laplacian on an infinite locally finite metric graph are equal to the number of finite volume graph ends. Moreover, we provide criteria, formulated in terms of finite volume graph ends, for the Gaffney Laplacian to be closed.
description: This version of the article is accepted for publication in J. Funct. Anal
Effects of mirror dark matter on neutron stars
Creators: name: Sandin, Fredrik
name: Ciarcelluti, Paolo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: If dark matter is made of mirror baryons, they are present in all gravitationally bound structures. Here we investigate some effects of mirror dark matter on neutron stars and discuss possible observational consequences. The general-relativistic hydrostatic equations are generalized to spherical objects with multiple fluids that interact by gravity. We use the minimal parity-symmetric extension of the standard model, which implies that the microphysics is the same in the two sectors. We find that the mass-radius relation is significantly modified in the presence of a few percent mirror baryons. This effect mimics that of other exotica, e.g., quark matter. In contrast to the common view that the neutron-star equilibrium sequence is unique, we show that it depends on the relative number of mirror baryons to ordinary baryons. It is therefore history dependent. The critical mass for core collapse, i.e., the process by which neutron stars are created, is modified in the presence of mirror baryons. We calculate the modified Chandrasekhar mass and fit it with a polynomial. A few percent mirror baryons is sufficient to lower the critical mass for core collapse by ~0.1 M_sun. This could allow for the formation of extraordinary compact neutron stars with low mass.
description: 8 pages, 5 figures. Updated discussion of heating in Section IV and Conclusions. Added references
Planning and Operation of Power Systems with High Share of Variable RES – European Views
Creators: H. Ergun
E. Gomez-Lazaro
K. Das
Publisher: name: IEEE
Year: 2018

2018 PES GM Panel Presentation
The share of variable renewable energy resources (RES) is still rapidly increasing within the European power system. RES, which are mostly based on power electronics, replace successively conventional power plants, which alters the system characteristic and furthermore increases different challenges regarding grid congestions, voltage stability, etc. At the same time, importance of aspects regarding coupling of different sectors is increasing and provides new degrees of freedom, which have to be stronger considered during the system optimization. This session will give an overview of the approaches used in the European countries regarding the grid planning and operation tasks within the power system with high penetration of RES. The issues regarding optimal application of flexibilities, operational cascade for coordination of TSO and DSO cooperation, cross-energy system planning and operation as well as synergies between different system levels will be focused. The results of different European and national projects will be presented.
Ultra-high Energy Gamma-rays from Past Explosions in our Galaxy
Creators: name: Kar, Alokananda
name: Gupta, Nayantara
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The discovery of the sources of ultra-high energy photons by High-Altitude Water Cerenkov Gamma ray Observatory and Large High Altitude Air Shower Observatory in our Galaxy has revolutionised the field of gamma ray astronomy in the last few years. These emissions are sometimes found in the vicinity of powerful pulsars or supernova remnants associated with giant molecular clouds. Inverse Compton emission by shock accelerated electrons emitted by pulsars and proton-proton interactions of shock accelerated protons emitted by supernova remnants with cold protons in molecular clouds are often identified as the causes of these emissions. In this paper we have selected two ultra-high energy photon sources LHAASO J2108+5157 and LHAASO J0341+5258 which are associated with giant molecular clouds, but no powerful pulsar or supernova remnant has been detected in their vicinity.We have proposed a scenario where shock accelerated electrons and protons are injected in the local environment of these sources from past explosions, which happened thousands of years ago. We show that the observed ultra-high energy photon flux can be explained with the secondary gamma rays produced by the time evolved relativistic electron and proton spectra.
description: 8 pages 5 figures, Accepted in ApJ
Compact stellar model in presence of pressure anisotropy in modified Finch Skea spacetime
Creators: name: Bhar, Piyali
name: Rej, Pramit
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A new model of anisotropic compact star is obtained in our present paper by assuming the pressure anisotropy. The proposed model is singularity free. The model is obtained by considering a physically reasonable choice for the metric potential $g_{rr}$ which depends on a dimensionless parameter `n'. The effect of $n$ is discussed numerically, analytically and through plotting. We have concentrated a wide range for n ($10\leq n \leq 1000$) for drawing the profiles of different physical parameters. The maximum allowable mass for different values of $n$ have been obtained by M-R plot. We have checked that the stability of the model is increased for larger value of $n$. For the viability of the model we have considered two compact stars PSR J1614-2230 and EXO 1785-248. We have shown that the expressions for the anisotropy factor and the metric component may serve as generating functions for uncharged stellar models in the context of the general theory of relativity.
description: 17 pages, 12 figures, Accepted in Journal of Astrophysics and Astronomy on 03.01.2021
Economics and Operating Experience of HVDC and FACTS – Recent HVDC and FACTS Refurbishments, Installations, and Special Controls that are the Economic Choice – Part II
Creators: F. Gomez
O. Macchione
J. Restrepo
Publisher: name: IEEE
Year: 2018

2018 PES GM Panel Presentation
This panel will discuss the thinking behind recent HVDC and FACTS refurbishments, new installations, and the opportunities presented by new controls and innovative uses of limited rights-of-way. The panel will address the economic reasons for HVDC and FACTS facilities and controls that can provide practical lessons learned.
Impact of the Use of Node-Breaker Representation in Power Flow and Transient Stability Analysis Software on Dynamic Performance
Creators: G. Taranto
X. Lin
F. Dong
S. Kinic
E. Vittal
H. Jinan
J. Hood
Publisher: name: IEEE
Year: 2018

2018 PES GM Panel Presentation
This panel session will examine the impact of the node-breaker representation in power flows and transient stability analysis simulation tools on static and dynamic contingency analysis. This panel which includes both software vendors and users will provide a unique perspective from both developers and users. The panel includes participants from North America and Brazil. The panellists will discuss both the analytical issues and results on application to actual systems. The panel will also discuss the ability to directly import real-time data from state estimators.
ESMO 2019 - Grounding for Personal Protection
Creators: Jeff Kopp
Gary A. Zevenbergen
Brian Erga
Publisher: name: IEEE
Year: 2019

Technical Session
A brief history of Temporary Protective Grounding is presented, highlighting the evolution of the practice and recent OSHA guidelines that impact working practices and product. Through simple circuit analysis, the impact of fault current on a lineman with and without adequate protective grounding will be demonstrated. This analysis also allows one to understand the potential hazardous impact to the worker when inadequate ground sets are employed or when adequate ground sets are improperly attached. Will discuss the construction of ground sets and how the component choices and assembly are critical to the performance of ground sets, emphasizing the importance of this through videos of ground sets being tested at fault current levels. These videos clearly illustrate the extreme energy associated with fault currents and the resultant potential destruction. The testing and maintenance of ground sets will be discussed. Equipotential grounding will be presented, with detail about the products needed to achieve an equipotential zone for the lineman. The benefit of equipotential grounding will be demonstrated using a Ground Set Simulator.
ESMO 2019 - Substation Integrated Design & Construction
Creators: Masoud Rafiee
Mark Mashburn
Brian Belcher
Boris William Troya
Brian Tschanen
John Garlitz
Publisher: name: IEEE
Year: 2019

Technical Session
In recent years, utility companies are undergoing rapid change and growth, resulting in an urgent need for a more efficient use of resources in design, construction, and operation and maintenance of their facilities. The necessity to improve the project delivery process has placed AEP Transmission and other progressive utility companies in a unique position to leverage the current experienced resources along with new tools and technologies in developing an intelligent 3D model of a station and the entire system to streamline processes and procedures not only in engineering, but also in construction, operation and maintenance groups. This panel session will discuss existing substation LIDAR & ground penetrating radar scanning, intelligent 3D/4D/5D modelling, substation constructions using prefabrications, constructability analysis, remote construction progress monitoring using drones, etc.
How did the ECB become a fully-fledged central bank of the euro zone?. Revue ECU/EURO, N°52 (2018)
Creators: name: Gren, Jakub
Publisher: name: RESuME
Year: 2017
Subjects: subject: Monetary Policy
subject: Politique monétaire
subject: European Central Bank
subject: Banque centrale européenne
subject: Court of Justice of the European Union
subject: Cour de justice de l'Union européenne
subject: unconventional monetary policy
subject: mesures non conventionnelles
subject: Price Stability
subject: Stabilité des prix
subject: Financial Stability
subject: Stabilité financière

description: Since the outbreak of the recent global financial crisis, there has been an intensive political discussion regarding the scope of the ECB’s monetary policy instruments designed to combat the crisis and revive economic growth across the euro zone. The main issue was whether certain ECB measures, both those adopted and those yet to be adopted, could be regarded as falling within the ECB’s monetary policy mandate. In this paper, Jakub Gren, PhD student at the University of Luxembourg (IPSE department), puts some lights on the Gauweiler (OMT) case-law and the evolution of the ECB's mandate through the principal agent theory.
Underground Monitoring
Creators: Rob Grawe
Dan Coleman
Reynold Cornell
Ken Jenkins
David Kummer
Jared Jajack
Publisher: name: IEEE
Year: 2019

Technical Session
This session will bring experts in underground cable systems, both Transmission and Distribution Networks, together in one session to discuss underground monitoring. This will include presentations in real-time Distribution Network monitoring, underground vault inspection techniques using UAS and submersible robots, and Distributed Temperature Sensing, Distributed Acoustical Sensing and on-line PD monitoring technology. The session will end with a short panel discussion between the audience and all the speakers.
Supernova host galaxy association and photometric classification of over 10,000 light curves from the Zwicky Transient Facility
Creators: name: Garretson, Braden
name: Milisavljevic, Dan
name: Reynolds, Jack
name: Weil, Kathryn E.
name: Subrayan, Bhagya
name: Banovetz, John
name: Lee, Rachel
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Here we present a catalog of 12,993 photometrically-classified supernova-like light curves from the Zwicky Transient Facility, along with candidate host galaxy associations. By training a random forest classifier on spectroscopically classified supernovae from the Bright Transient Survey, we achieve an accuracy of 80% across four supernova classes resulting in a final data set of 8208 Type Ia, 2080 Type II, 1985 Type Ib/c, and 720 SLSN. Our work represents a pathfinder effort to supply massive data sets of supernova light curves with value-added information that can be used to enable population-scale modeling of explosion parameters and investigate host galaxy environments.
description: 3 pages, 1 table, published in The Research Notes of the AAS, data available at https://doi.org/10.5281/zenodo.5735569; table typos corrected
Family reactions to the crisis of illness
Creators: name: Brown, Thelma M.
Publisher: name: University of British Columbia
Year: 2010

description: This exploratory study was designed to elicit information about family reactions to the crisis of illness and what families perceive to be helpful during this crisis. The study focused on the family crisis of incorporating back into the family a father who had experienced his first myocardial infarction. The study was conducted with a convenience sample of ten male myocardial infarction patients, their wives, and children living in the household. A semi-structured interview schedule was used with each family one to three weeks following the father's discharge from hospital. The interview data were summarized into categories and descriptive statistics were used. All 10 families described changes that had occurred in the areas of family roles, interactions, affect and structure since the father had returned home from hospital. The amounts of help received by families varied a great deal and differences of opinion were expressed within some families. Friends and home care nurses were most frequently seen as persons offering the most help to families. Receiving information and reassurance were seen as helpful during this time. In summary, the results of the study indicate that families do experience a variety of changes when a family member is ill. The quantity and quality of change are related to the family's perception of the nature of the illness, the ill member's enactment of the sick role and the degree of difference between the family's pre-illness and post-illness state. Illness, especially life-threatening illness, fosters a review of individual and family goals which can also produce change. It is also presumed that family reactions can have an effect on the course of illness. The effect is dependent upon family perceptions of the illness, the amount and kind of controls they can exercise, and the personal needs of individual family members. More research is required to identify the characteristics and temporal aspects of family reactions to illness and family effects on illness. Innovative approaches to research design and methodology are required to ensure scientific theory development and continued appreciation of the complexity of family systems.
The early evolution of solar flaring plasma loops
Creators: name: Tan, Baolin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Plasma loops are the elementary structures of solar flaring active regions which dominate the whole processes of flaring eruptions. The standard flare models are well explained the evolution and eruption after magnetic reconnection around the hot cusp-structure above the top of plasma loops, however, the early evolution of the plasma loops before the onset of magnetic reconnection has been poorly understood. Considering that magnetic-gradients are ubiquitous in solar plasma loops, this work applies the magnetic-gradient pumping (MGP) mechanism to study the early evolution of flaring plasma loops. The results indicate that the early evolution depend on the magnetic field distribution and the geometry of the plasma loops which dominates the balance between the accumulation and dissipation of energy around loop-tops. Driven by MGP process, both of the density and temperature as well as the plasma beta value around the looptop will increase in the early phase of the plasma loops evolution. In fact, the solar plasma loops will have two distinct evolutionary results: the low, initial dense plasma loops with relatively strong magnetic fields tend to be stable for their maximum beta value always smaller than the critical value, while the higher, initial dilute solar plasma loops with relatively weak magnetic fields tend to be unstable for their beta values exceeding the critical value at a time of about one hour after the formation of the solar magnetized plasma loop. The latter may produce ballooning instability and finally trigger the following magnetic reconnection and eruptions. These physical scenarios may provide us a new viewpoint to understand the nature and origin of solar flares.
description: 12 pages, 3 figure
A Catalog of Multiplicity among Bright Stellar Systems
Creators: name: Eggleton, P. P.
name: Tokovinin, A. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider the multiplicity of stellar systems with (combined) magnitude brighter than 6.00 in Hipparcos magnitudes. We identify 4559 such bright systems (including the Sun), and the frequencies of multiplicities 1, 2,..., 7 are found to be 2718, 1437, 285, 86, 20, 11 and 2. We discuss the uncertainties, which are substantial. We also consider the distributions of periods of orbits and sub-orbits. We note that for the even more restricted set of 478 systems with V_H <= 4.00 the proportions of higher multiples up to sextuple are progressively larger (213, 179, 54, 19, 8, 5), suggesting substantial incompleteness in even the reasonably well-studied larger sample. This sample can be seen as relatively thoroughly studied for multiplicity, and reasonably representative of stars more massive than the Sun. But the restriction to V_H <= 6 means that our sample contains hardly any systems where all components are low-mass main-sequence stars (K or M). Data on multiplicity is important as a constraint on (a) the star-formation problem, (b) the problem of the evolution of the Galactic stellar population, and (c) the interaction of dynamics and evolution through the effect of Kozai cycles. We discuss these topics briefly.
description: Accepted for publication in MNRAS 11 pages, 1 figure, 3 tables: http://www.ctio.noao.edu/ftp/pub/tokovinin/eggleton2008/Table1.txt http://www.ctio.noao.edu/ftp/pub/tokovinin/eggleton2008/Table2.txt http://www.ctio.noao.edu/ftp/pub/tokovinin/eggleton2008/Table1.txt
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Wilde, Mark M.
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2018
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization

description: Front Matter, Table of Contents, Preface, Conference Organization
description: LIPIcs, Vol. 73, 12th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2017), pages 0:i-0:x
ESMO 2019 - Field Engagement is Key
Creators: Marketta Franklin
Mark A. Gabriel
Ronald D. Critelli Jr.
Brent Stegner
Carl Segneri
Natalie McCord
Publisher: name: IEEE
Year: 2019

Technical Session
The opening panel session will focus on integrating field perspectives into all aspects of the delivery business. Executives and field representatives will share how utilities and contractors tap into the talents of field personnel to spark innovation, creativity and efficiency and to enhance safety. Panelists will share how field workforce teams collaborate to assure field considerations are taken into account in the design, construction, operations and maintenance of the grid.
Emerging Heuristic Optimization Algorithms for Operational Planning ofSustainable Electrical Power Systems
Creators: S. Rivera
K. Pandya
L. Carvalho
H. Liu
J. Rueda Torres
Publisher: name: IEEE
Year: 2018

2018 PES GM Panel Presentation
Reliability standards increasingly require transmission utilities and regional transmission operators to regularly assess the vulnerability of their systems to cascading failures. While there is agreement that this analysis should be done, obtaining valid, actionable conclusions from a cascading failure analysis is among the most challenging problems in the electricity industry today. Several difficulties add to this challenge. First, the dynamics of power systems during "emergency" and "in extremis" operations involve complicated interactions between thousands of components and human operators, none of which are likely to perform exactly as the modeling tools predict. Second, the sheer quantity of data that operators obtain from both the models and from the real system make it difficult to transform the resulting corpus of data into valid conclusions. Finally, power systems can no longer be considered independent from other critical infrastructure systems, such as natural gas pipelines and communication networks. This interdependence increases the challenges of cascading failure analysis. This panel will address these challenges directly by bringing together both researchers and industry experts who see promising solutions on the horizon.
ESMO 2019 - Developments & Opportunities of Microgrid and DER Technologies
Creators: Mahesh Illindala
Amrit Khalsa
Tom Weaver
Subin T. Mathew
Publisher: name: IEEE
Year: 2019

Technical Session
Microgrids and DERs (distributed generators, energy storage devices, and controllable loads) are reshaping the utility industry from a centralized electricity supplying method to a decentralized one and from relying on fuels to producing and consuming cleaner energy. These changes will drive increasingly decarbonized, reduce power losses, defer transmission & distribution infrastructure upgrades and expansions, increase power supplying resilience and finally improve customer experiences with more options. In the meantime, there are still many challenges to be resolved, such as developing more durable and economical switching devices or batteries, advancing DER management and protection technologies, optimizing the size and location of a DER or a microgrid, and overcoming the limitations of the existing regulatory and market frameworks, etc. This panel session is targeted to share some of the latest micorgrid and DER technologies and look into the future development and application opportunities.