cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Patch-Based Deep Autoencoder for Point Cloud Geometry Compression
Creators: name: You, Kang
name: Gao, Pan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Multimedia (cs.MM)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The ever-increasing 3D application makes the point cloud compression unprecedentedly important and needed. In this paper, we propose a patch-based compression process using deep learning, focusing on the lossy point cloud geometry compression. Unlike existing point cloud compression networks, which apply feature extraction and reconstruction on the entire point cloud, we divide the point cloud into patches and compress each patch independently. In the decoding process, we finally assemble the decompressed patches into a complete point cloud. In addition, we train our network by a patch-to-patch criterion, i.e., use the local reconstruction loss for optimization, to approximate the global reconstruction optimality. Our method outperforms the state-of-the-art in terms of rate-distortion performance, especially at low bitrates. Moreover, the compression process we proposed can guarantee to generate the same number of points as the input. The network model of this method can be easily applied to other point cloud reconstruction problems, such as upsampling.
description: Accepted to ACM Multimedia Asia (MMAsia '21)
IEEE PES Industry Technical Support Task Force: Managing the New Grid
Creators: IEEE Power & Energy Society Industry Technical Support Task Force
Publisher: name: IEEE
Year: 2018

2018 PES Technical Support Task Force
The purpose of this brief written testimony is to provide an IEEE viewpoint in response to the FERC 2018 Reliability Technical Conference (Docket No. AD18-11-000). IEEE representative, Damir Novosel, will be on the Panel III, Managing the New Grid. This panel will explore Power System Planning and Operations challenges and opportunities as a result of the changes in the generating resource mix, taking into account steps NERC, the Regional Entities, industry, and the Commission have taken. These steps include assessing the impacts of power plant retirements and the increasing dependence of the grid on natural gas, solar, and wind power.
Projective collineations of decomposable spacetimes generated by the Lie point symmetries of geodesic equations
Creators: name: Paliathanasis, Andronikos
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We investigate the relation of the Lie point symmetries for the geodesic equations with the collineations of decomposable spacetimes. We review previous results in the literature on the Lie point symmetries of the geodesic equations and we follow a previous proposed geometric construction approach for the symmetries of differential equations. In this study we prove that the projective collineations of a $\left( n+1\right) \,$% -dimensional decomposable Riemannian space are the Lie point symmetries for geodesic equations of the $n$-dimensional subspace. We demonstrate the application of our results with the presentation of applications.
description: 26 pages, to appear in Symmetry
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Drmota, Michael
name: Heuberger, Clemens
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2020
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: Mathematics of computing
subject: Theory of computation
subject: Computing methodologies

description: Front Matter, Table of Contents, Preface, Conference Organization
description: LIPIcs, Vol. 159, 31st International Conference on Probabilistic, Combinatorial and Asymptotic Methods for the Analysis of Algorithms (AofA 2020), pages 0:i-0:xii
Webinar - Global Electric Power Sector:  Engaging with Environmental Issues (Slides)
Creators: Saifur Rahman
Publisher: name: IEEE
Year: 2020

This webinar presentation will review the environmental issues the global electric power sector is dealing with
China, US, India, Japan and Russia are the top five countries in terms of electricity generation capacity. Between them they had a total capacity of 3,650 million kW in 2016. In terms of fuel sources for electricity coal, natural gas, hydro, nuclear, renewables and oil provided 38.3%, 22.9%, 16.3%, 10.2%, 9% and 3.3% respectively in 2017. This means almost two-thirds of the global electricity production came from fossil fuels in that year. This is reflected in about 10 billion tons of CO2 from electricity generation or about a third of the global production. However, this mix is expected to change significantly in the next 10 years. By 2030, installed power generation capacities from wind, solar PV, hydro power, nuclear and thermal are going to reach 540 GW, 420 GW, 530 GW, 160 GW and 1200 GW respectively.
The top five CO2 emitting countries are: China, United States, India, Russian Federation and Japan each producing between nine and one billion metric tons of CO2 in 2016. However, CO2 is not the only concern against global warming. The Global Warming Potentials (GWP) of greenhouse gases are as follows: CO2 (1), Methane (28), Hydro fluorocarbons (138), Nitrous oxide (265), Per fluorocarbons (6,630) and Sulphur hexafluoride (23,500).
So, the bottom line is: Efforts in the electric power sector to replace fossil fuel with renewables and nuclear will help. But if emission from the transportation sector continues to rise, the drop in power sector contributions will not be enough. Large scale Electric Vehicle deployment will help, but question remains – how will the EV be powered?
Power and Energy Magazine - Volume 17: Issue 6 - Nov/Dec 2019: New Breakthroughs: Decarbonizing the Electric Energy Supply
Creators: Various
Publisher: name: IEEE
Year: 2019

Volume 17: Issue 6: Nov/Dec 2019: New Breakthroughs: Decarbonizing the Electric Energy Supply
This issue, compiled by Guest Editors Charles Smith and Charlton Clark, updates the means of integrating large wind and solar plants, which have grown tremendously since our November/December 2017 issue devoted to this topic. The authors present a worldwide report on the diversity of approaches and successful recipes for decarbonizing the electric energy supply. We all can learn from the tremendous insights provided on the following topics:
- operating experience with high levels of variable inverter-based generation
- means of achiev ing bulk power sys tem reliability with large amounts of distributed energy resources
- the theory and use of probabilistic forecasts
- market designs with massive amounts of zero-cost variable energy resources
- the need for system flexibility and ways to achieve itcodes, standards, and IEC collaboration for the design and interconnection of inverterbased resources connected to the transmission and distribution systems
- the status and future of gridforming inverters
- the transition from rapid to quality development of renewable resources in China.
Western Energy Imbalance Market
Creators: W. Dan
T. Saha
J. Alam
S. Soonee
A. Rajput
A. Jain
Publisher: name: IEEE
Year: 2018

2018 PES GM Panel Presentation
This panel session is meant for reporting about experience on application of smart grid technology in different facets of handling electric power and energy, right from generation to utilization. Various aspects of renewable energy resources-based generation and its integration with the existing system for consumption in Asia and Australasia are being talked about and even compared with developed country like, USA for economic growth and other pertinent issues.
Frequency Shift Algorithm: Design of a Baseband Phase Locked Loop for Frequency-Domain Multiplexing Readout of X-ray Transition-Edge Sensor Microcalorimeters
Creators: name: van der Hulst, Paul
name: van der Kuur, Jan
name: Nieuwenhuizen, Ad
name: Vaccaro, Davide
name: Akamatsu, Hiroki
name: van Winden, Patrick
name: van Leeuwen, Bert-Joost
name: Herder, Jan-Willem den
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Systems and Control (eess.SY)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The Transition-Edge Sensor (TES) is an extremely sensitive device which is used to measure the energy of individual X-ray photons. For astronomical spectrometry applications, SRON develops a Frequency Domain Multiplexing (FDM) read-out system for kilopixel arrays of such TESs. Each TES is voltage biased at a specific frequency in the range 1 to 5 MHz. Isolation between the individual pixels is obtained through very narrow-band (high-Q) lithographic LC resonators. To prevent energy resolution degradation due to intermodulation line noise, the bias frequencies are distributed on a regular grid. The requirements on the accuracy of the LC resonance frequency are very high. The deviation of the resonance frequencies due to production tolerances is significant with respect to the bandwidth, and a controller is necessary to compensate for the LC series impedance. We present two such controllers: a simple orthogonal proportional-integrating (PI) controller and a more complex impedance estimator. Both controllers operate in baseband and try to make the TES current in-phase with the bias voltage, effectively operating as phase-locked loops (PLL). They allow off-LC-resonance operation of the TES pixels, while preserving TES thermal response and energy resolution. Extensive experimental results -- published in a companion paper recently -- with the proposed methods, show that these controllers allow the preservation of single pixel energy resolution in multiplexed operation.
How to Write an Effective Technical Paper - Slides
Creators: S. Rahman
J. Loring
Publisher: name: IEEE
Year: 2019

How to Write an Effective Technical Paper - Slides
You might have great ideas and research, but unless you can bring it all together for your reader, you won't have a strong technical paper. In this webinar Prof. Saifur Rahman will highlight issues with paper structure, conference vs. journal papers, ethics, where to publish, open access, impact factor, etc. Providing an excellent foundational preparation for writing your paper.
Uncloneable Quantum Encryption via Random Oracles
Creators: name: Lord, Sébastien
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2019
Subjects: Quantum Cryptography

description: One of the key distinctions between classical and quantum information is given by the no-cloning theorem: unlike bits, arbitrary qubits cannot be perfectly copied. This fact has been the inspiration for many quantum cryptographic protocols. In this thesis, we introduce a new cryptographic functionality called uncloneable encryption. This functionality allows the encryption of a classical message such that two collaborating but non-communicating adversaries may not both simultaneously recover the message, even when the encryption key is revealed. We achieve this functionality by using Wiesner’s conjugate coding scheme to encrypt the message. We show that the adversaries cannot both obtain all the necessary information for the correct decryption with high probability. Quantum-secure pseudorandom functions, modelled as random oracles, are then used to ensure that any partial information that the adversaries obtain does not give them an advantage in recovering the message.
Interpreting the recent results on direct search for dark matter particles in terms of relic neutralino
Creators: name: Bottino, A.
name: Donato, F.
name: Fornengo, N.
name: Scopel, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The most recent results from direct searches for dark matter particles in the galactic halo are examined in terms of an effective Minimal Supersymmetric extension of the Standard Model at the electroweak scale without gaugino masses unification. We show that the annual modulation effect at 8.2 $σ$ C.L. recently presented by the DAMA Collaboration, as the result of a combined analysis of the DAMA/NaI and the DAMA/LIBRA experiments for a total exposure of 0.82 ton yr, fits remarkably well with what expected for relic neutralinos for a wide variety of WIMP distribution functions. Bounds derivable from other measurements of direct searches for dark matter particles are analyzed. We stress the role played by the uncertainties affecting the neutralino--quark couplings arising from the involved hadronic quantities. We also examine how present data on cosmic antiprotons can help in constraining the neutralino configurations selected by the DAMA effect, in connection with the values of the astrophysical parameters. Perspectives for measurement of antideuterons possibly produced in the galactic halo by self--annihilation of neutralinos belonging to the DAMA configurations are examined. Finally, we discuss how findings at LHC would impact on these issues.
description: 18 pages, 10 figures a few minor comments and two references added
The synthesis and spectral and magnetic properties of some iron sulfonate compounds
Creators: name: Haynes, John Stephen
Publisher: name: University of British Columbia
Year: 2010

description: The work described in this thesis involved the synthesis and characterisation of a number of iron sulfonate compounds, Fe(XSO₃)[sub n], where X is CF₃, CH₃ and p-CH₃C₆H₄, and n is 2 or 3. The work is an attempt to probe the coordinating ability of the XSO₃ anion and extends previous studies in this laboratory on other divalent metal sulfonates. The physical methods of characterisation included infrared, electronic and Mossbauer spectroscopy and magnetic susceptibility measurements. These techniques have enabled a detailed picture of the structure of the iron(II) sulfonates to be envisaged. The general structure proposed involves terdentate bridging anions, each anion bridging to three different metal centres resulting in FeO₆ octahedra; the distortions from perfect octahedral geometry have also been analysed. Iron(II) methanesulfonate was found to exist in two closely related structural forms, the a-isomer containing trigonally compressed FeO₆ octahedra and the β-isomer containing trigonally elongated FeO₆ octahedra. No evidence for structural isomerism was found for Fe(CF₃SO₃)₂ or Fe(p-CH₃C₆H₄SO₃) but vibrational spectroscopy revealed structural isomerism in other (M(CH₃SO₃)₂ compounds, where M is Co and Zn. Both α- and β-Fe(CH₃SO₃)₂ showed unusual magnetic properties II and Mossbauer spectroscopy enabled an antiferromagnetic phase transition to be observed in the case of the β-isomer. Preliminary results for the iron(III) sulfonates, Fe(CF₃SO₃)₃, Fe(CH₃SO₃)₃ and Fe(p-CH₃C₆H₄SO₃)₃ indiate antiferromagnetic exchange in these compounds.
Interlayer Exchange Interaction Driven Topological Phase Transition in Antiferromagnetic Electride Gd$_2$O
Creators: name: Liu, Shuyuan
name: Wang, Chongze
name: Jeon, Hyunsoo
name: Kim, Jeehoon
name: Cho, Jun-Hyung
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Based on first-principles calculations, we discover a two-dimensional layered antiferromagnetic (AFM) electride Gd$_2$O, where anionic excess electrons exist in the interstitial spaces between positively charged cationic layers. It is revealed that each cationic layer composed of three-atom-thick Gd$-$O$-$Gd stacks has in-plane ferromagnetic and out-of-plane AFM superexchange interactions between the localized Gd 4$f$ spins through O 2$p$ orbitals. Furthermore, the interlayer superexchange mediated by the hybridized Gd-5$d$ and interstitial-$s$-like states involves intimate couplings between the spin, lattice, and charge degrees of freedom, thereby inducing simultaneous magnetic, structural, and electronic phase transitions. The resulting ground state with the simple hexagonal lattice hosts massless Dirac fermions protected by nonsymmorphic magnetic symmetry, as well as massive Dirac fermions. We thus demonstrate that the anionic excess electrons in Gd$_2$O play a crucial role in the emergence of magnetic Dirac semimetal states, therefore offering an intriguing interplay between 2D magnetic electrides and topological physics.
Gated combo nanodevice for sequential operations on single electron spin
Creators: name: Bednarek, S.
name: Szafran, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: An idea for a nanodevice in which an arbitrary sequence of three basic quantum single qubit gates - negation, Hadamard and phase shift - can be performed on a single electron spin. The spin state is manipulated using the spin-orbit coupling and the electron trajectory is controlled by the electron wave function self-focusing mechanism due to the electron interaction with the charge induced on metal gates. We present results of simulations based on iterative solution of the time dependent Schrödinger equation in which the subsequent operations on the electron spin can be followed and controlled. Description of the moving electron wave packet requires evaluation of the electric field within the entire nanodevice in each time step.
Chemical freeze-out in ultra-relativistic heavy ion collisions at sqrt(s)_NN = 130 and 200 GeV
Creators: name: Manninen, J.
name: Becattini, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A comprehensive and detailed analysis of hadronic abundances measured in Au-Au collisions at RHIC at sqrt(s)_NN = 130 and 200 GeV is presented. The rapidity densities measured in the central rapidity region have been fitted to the statistical hadronization model and the chemical freeze-out parameters determined as a function of centrality, using data from experiments BRAHMS, PHENIX and STAR. The chemical freeze-out temperature turns out to be independent of centrality to a few percent accuracy, whereas the strangeness under-saturation parameter gamma_S decreases from almost unity in central collisions to a significantly lower value in peripheral collisions. Our results are in essential agreement with previous analyses, with the exception that fit quality at sqrt(s)_NN = 200 GeV is not as good as previously found. From the comparison of the two different energies, we conclude that the difference in fit quality, as described by chi2 values, is owing to the improved resolution of measurements which has probably exceeded the intrinsic accuracy of the simplified theoretical formula used in the fits.
description: 18 pages, 6 figures. PUblished version
Controllable spin filtering and half metallicity in $β_{12}$-borophene nanoribbons
Creators: name: Norouzi, Fahimeh
name: Farokhnezhad, Mohsen
name: Esmaeilzadeh, Mahdi
name: Szafran, Bartlomiej
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The experimental observation of the Dirac fermion states in $β_{12}$-borophene sheets and the discovery of their novel topological properties properties have made them a promising candidate for spintronic applications. Here, by combining non-equilibrium Green's function (NEGF) and tight-binding (TB) approximation, we study the charge and spin transport properties through a $β_{12}$-borophene nanoribbon (BNR) with the different edge shapes. We show when a BNR exposed to a nonlocal exchange magnetic field, the spin filtering occurs for both spin-up and spin-down so that the spin direction of transmitted electrons could be controlled by adjusting the energy of incoming electrons with the help of an external backgate voltage. It is found that an armchair BNR (ABNR) in the simultaneous presence of a transverse electric field and a nonlocal exchange field indicates a half-metallic nature which is electrically controllable. Moreover, the influence of local exchange field fields is evaluated by exposing the edges of ABNR to ferromagnetic strips with parallel and antiparallel configurations. Our findings show that the edge manipulations in ABNRs lead to the emergence of a giant magnetoresistance and a perfect spin filter. Finally, we studied the effects of edge vacancies and Anderson disorder on the spin-dependent conductance of an ABNR and find that the perfect spin polarization is not destroyed in the presence of Anderson disorder and various single vacancies. Our results reveal the outstanding spin transport properties of ABNRs for future spintronic devices.
description: 10 pages, 10 figures
Ergodicity breaking in strong and network-forming glassy system
Creators: name: Caponi, S.
name: Zanatta, M.
name: Fontana, A.
name: Bove, L. E.
name: Orsingher, L.
name: Natali, F.
name: Petrillo, C.
name: Sacchetti, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The temperature dependence of the non-ergodicity factor of vitreous GeO$_2$, $f_{q}(T)$, as deduced from elastic and quasi-elastic neutron scattering experiments, is analyzed. The data are collected in a wide range of temperatures from the glassy phase, up to the glass transition temperature, and well above into the undercooled liquid state. Notwithstanding the investigated system is classified as prototype of strong glass, it is found that the temperature- and the $q$-behavior of $f_{q}(T)$ follow some of the predictions of Mode Coupling Theory. The experimental data support the hypothesis of the existence of an ergodic to non-ergodic transition occurring also in network forming glassy systems.
Chronogenesis-Theory(CNG): A Unified Framework for Cosmology, Gravity, and Quantum Mechanics, Compendium.
Creators: name: Price, Robert Anthony
Publisher: name: Zenodo
Year: 2025
Subjects: Alternative cosmological models
Expanse-Time Theory
XTT cosmology
Modified gravity
Gravitational time dilation
Cosmological redshift drift
Supernovae cosmology
Baryon Acoustic Oscillations (BAO)
Hubble parameter evolution
Gravitational wave frequency shifts
Dark energy alternatives
Cosmological model validation
Supernovae luminosity distance
Type Ia supernovae (Pantheon+)
Redshift evolution
Statistical homogeneity scale (SHS)
Large-scale structure formation
High-redshift galaxy formation
Gravitational wave astrophysics
Pulsar timing deviations
Bayesian model comparison
Mean squared error (MSE) cosmology
Pearson correlation astrophysics
Modified FLRW metric
Scalar averaging in cosmology
Cosmic distance ladder refinements
Alternative explanations for cosmic acceleration
LIGO/Virgo frequency drift analysis
JWST high-redshift observations
SDSS DR17 supernova dataset
Planck CMB constraints
LIGO/Virgo gravitational wave tests
NANOGrav pulsar timing
DES dark energy survey
ELT and SKA redshift drift
CNG Theory
Chronogenesis Theory
CNG-Theory
Chronogenesis-Theory
Theory Of Everything
ToE

description: This work presents real-world tests of the Chronogenesis (CNG) Theory, a new way of understanding the universe. Instead of seeing time as just something that passes, Chronogenesis treats time as a real, physical field that can stretch, bend, and ripple—just like space. Everything we see—mass, energy, gravity, quantum effects—comes from the shape and behavior of this time field, called Θ (Theta).

 

Chronogenesis replaces the need for things like dark energy, inflation, or extra forces. It matches the predictions of general relativity when needed but goes beyond it to explain things current science cannot.

 

We compare Chronogenesis predictions to data from JWST, DESI, Planck, LIGO, SDSS, NANOGrav, and supernova surveys like Pantheon+. The theory correctly predicts things like:

 

How galaxies formed so early in the universe

 

How gravitational waves slightly shift over time

 

How quantum systems lose coherence

 

Why the expansion of the universe appears the way it does

 

The exact masses of particles like the electron and neutrinos

 

 

In total, Chronogenesis matches over 63 datasets from astronomy, quantum physics, and gravity with very high accuracy—usually better than 1%. It does this using only the geometry of time, not guesswork or adjustable numbers.

 

This is the first theory to bring together quantum physics, gravity, and cosmology into one consistent model—built independently by someone studying time as a real force in nature. A full table of predictions and how close they are to real measurements is included.
title: Expanse-Time Theory (XTT): Empirical Validation from JWST, DESI, Planck, and Gravitational Wave Observations
title: Expanse-Time Theory (XTT): Empirical Validation from JWST, DESI, Planck, and Gravitational Wave Observations compendium
titleType: AlternativeTitle
Creators: name: Price, Robert Anthony
Publisher: name: Zenodo
Year: 2025
Subjects: Alternative cosmological models
Expanse-Time Theory
XTT cosmology
Modified gravity
Gravitational time dilation
Cosmological redshift drift
Supernovae cosmology
Baryon Acoustic Oscillations (BAO)
Hubble parameter evolution
Gravitational wave frequency shifts
Dark energy alternatives
Cosmological model validation
Supernovae luminosity distance
Type Ia supernovae (Pantheon+)
Redshift evolution
Statistical homogeneity scale (SHS)
Large-scale structure formation
High-redshift galaxy formation
Gravitational wave astrophysics
Pulsar timing deviations
Bayesian model comparison
Mean squared error (MSE) cosmology
Pearson correlation astrophysics
Modified FLRW metric
Scalar averaging in cosmology
Cosmic distance ladder refinements
Alternative explanations for cosmic acceleration
LIGO/Virgo frequency drift analysis
JWST high-redshift observations
SDSS DR17 supernova dataset
Planck CMB constraints
LIGO/Virgo gravitational wave tests
NANOGrav pulsar timing
DES dark energy survey
ELT and SKA redshift drift

description: This work presents an observational validation of the Expanse-Time Theory (XTT), a cosmological framework that replaces space-only expansion with a unified expansion of spacetime. By allowing cosmic time itself to expand, XTT eliminates the need for inflation and dark energy, while remaining consistent with general relativity locally.

 

We compare XTT predictions to recent data from JWST/NIRSpec, DESI DR2, Planck 2018, LIGO/Virgo, SDSS DR17, and the Pantheon+ supernovae catalog. All observables — including redshift-time relations, BAO scaling, structure formation timing, and gravitational wave drift — are matched to within sub-percent precision.

 

The theory accurately predicts early massive galaxy formation (e.g., JADES-GS-z10-0 at z = 10.38), phase drift in LIGO waveforms, and redshift drift behavior without invoking ΛCDM-specific parameters. A full table of predictions and residuals is included.

 

This is the first unified cosmological model that is fully consistent with observational data across cosmic epochs — developed without formal training, by a builder independently investigating gravitational time dilation.
Expanse-Time Theory (XTT): A Unified Framework for Cosmology, Gravity, and Quantum Mechanics, Compendium.
Creators: name: Price, Robert Anthony
Publisher: name: Zenodo
Year: 2025
Subjects: Alternative cosmological models
Expanse-Time Theory
XTT cosmology
Modified gravity
Gravitational time dilation
Cosmological redshift drift
Supernovae cosmology
Baryon Acoustic Oscillations (BAO)
Hubble parameter evolution
Gravitational wave frequency shifts
Dark energy alternatives
Cosmological model validation
Supernovae luminosity distance
Type Ia supernovae (Pantheon+)
Redshift evolution
Statistical homogeneity scale (SHS)
Large-scale structure formation
High-redshift galaxy formation
Gravitational wave astrophysics
Pulsar timing deviations
Bayesian model comparison
Mean squared error (MSE) cosmology
Pearson correlation astrophysics
Modified FLRW metric
Scalar averaging in cosmology
Cosmic distance ladder refinements
Alternative explanations for cosmic acceleration
LIGO/Virgo frequency drift analysis
JWST high-redshift observations
SDSS DR17 supernova dataset
Planck CMB constraints
LIGO/Virgo gravitational wave tests
NANOGrav pulsar timing
DES dark energy survey
ELT and SKA redshift drift

description: This work presents an observational validation of the Expanse-Time Theory (XTT), a cosmological framework that replaces space-only expansion with a unified expansion of spacetime. By allowing cosmic time itself to expand, XTT eliminates the need for inflation and dark energy, while remaining consistent with general relativity locally.

 

We compare XTT predictions to recent data from JWST/NIRSpec, DESI DR2, Planck 2018, LIGO/Virgo, SDSS DR17, and the Pantheon+ supernovae catalog. All observables — including redshift-time relations, BAO scaling, structure formation timing, and gravitational wave drift — are matched to within sub-percent precision.

 

The theory accurately predicts early massive galaxy formation (e.g., JADES-GS-z10-0 at z = 10.38), phase drift in LIGO waveforms, and redshift drift behavior without invoking ΛCDM-specific parameters. A full table of predictions and residuals is included.

 

This is the first unified cosmological model that is fully consistent with observational data across cosmic epochs — developed without formal training, by a builder independently investigating gravitational time dilation.
The Most Luminous Starbursts in the Universe
Creators: name: Weedman, Daniel W.
name: Houck, James R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A summary of starburst luminosities based on PAH features is given for 243 starburst galaxies with 0 < z < 2.5, observed with the Spitzer Infrared Spectrograph. Luminosity vLv(7.7um) for the peak luminosity of the 7.7um PAH emission feature is found to scale as log[vLv(7.7um)] = 44.63(+-0.09) + 2.48(+-0.28)log(1+z) for the most luminous starbursts observed. Empirical calibrations of vLv(7.7um) are used to determine bolometric luminosity Lir and the star formation rate (SFR) for these starbursts. The most luminous starbursts found in this sample have log Lir = 45.4(+-0.3) + 2.5(+-0.3)log(1+z), in ergs per s, and the maximum star formation rates for starbursts in units of solar masses per yr are log(SFR) = 2.1(+-0.3) + 2.5(+-0.3)log(1+z), up to z = 2.5. The exponent for pure luminosity evolution agrees with optical and radio studies of starbursts but is flatter than previous results based in infrared source counts. The maximum star formation rates are similar to the maxima determined for submillimeter galaxies; the most luminous individual starburst included within the sample has log Lir = 46.9, which gives a SFR = 3400 solar masses per yr.
description: Accepted for publication in The Astrophysical Journal
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Faro, Simone
name: Cantone, Domenico
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2020
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: Theory of computation → Design and analysis of algorithms

description: Front Matter, Table of Contents, Preface, Conference Organization
description: LIPIcs, Vol. 160, 18th International Symposium on Experimental Algorithms (SEA 2020), pages 0:i-0:xii
Absolutely continuous spectrum for a random potential on a tree with strong transverse correlations and large weighted loops
Creators: name: Froese, Richard
name: Hasler, David
name: Spitzer, Wolfgang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82B44

description: We consider random Schrödinger operators on tree graphs and prove absolutely continuous spectrum at small disorder for two models. The first model is the usual binary tree with certain strongly correlated random potentials. These potentials are of interest since for complete correlation they exhibit localization at all disorders. In the second model we change the tree graph by adding all possible edges to the graph inside each sphere, with weights proportional to the number of points in the sphere.
description: 25 pages, 4 figures
Optical caustics of Kerr spacetime: the full structure
Creators: name: Bozza, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an exhaustive numerical investigation of the optical caustics in gravitational lensing by a spinning black hole for an observer at infinity. Besides the primary caustic, we examine higher order caustics, formed by photons performing one or several loops around the black hole. Our investigation covers the whole parameter space, including the black hole spin, its inclination with respect to the line of sight, the source distance, and the caustic order. By comparing our results with the available analytical approximations, we find perfect agreement in their respective domains of validity. We then prove that all caustics maintain their shape (a tube with astroidal cross-section) in the entire parameter space without suffering any transitions to different caustic shapes. For nearly extremal spin, however, higher order caustics grow so large that their cross-sections at fixed radii wind several times around the black hole. As a consequence, for each caustic order, the number of images ranges from 2 to 2(n+1), where n is the number of loops spanned by the caustic. As for the critical curves, we note that for high values of the spin they develop a small dip on the side corresponding to prograde orbits.
description: 20 pages, 21 figures
Differential Power: A Fundamental Limit of Power Conversion Slides
Creators: Jose A. Cobos
Publisher: name: IEEE
Year: 2018

PELS Webinar Slides
In this talk, the main novelty is the VA interpretation of power conversion, that enables the calculation of novel continuous power models for 2 port and n port converters. This methodology also enables the synthesis of specific power topologies to operate in this fundamental limit of power processing.

Key applications are Power balancing between stacked sources (PV cells), loads (data processing cores) or batteries. Partial power configurations may also be assessed with the differential power approach. More relevant is the case of energy buffered converters, as those required in single phase inverters connected to domestic batteries PV panels or those required in AC adaptors and chargers with Power Factor Correction.

Three phase rectifiers and inverters may be also be synthesized to operate in the fundamental limit of power conversion. The methodology is illustrated for the Little Box Challenge (Google and IEEE PELS) specification. The differential power is calculated, and compared with the indirect power processed by the main alternative architectures. Finally, an inverter is synthesized to operate in this fundamental limit.
The warm inflationary universe
Creators: name: Berera, Arjun
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the past decade, the importance of dissipation and fluctuation to inflationary dynamics has been realized and has led to a new picture of inflation called warm inflation. Although these phenomena are common to condensed matter systems, for inflation models their importance has only recently started to be appreciated. The article describes the motivation for these phenomenon during inflation and then examines their origins from first principles quantum field theory treatments of inflation models. Cosmology today is a data intensive field and this is driving theory to greater precision and predictability. This opens the possibility to consider tests for detecting observational signatures of dissipative processes, which will be discussed. In addition it will be discussed how particle physics and cosmology are now working in tandem to push the boundaries of our knowledge about fundamental physics.
description: 20 pages, 8 figures
Very peculiar wind from BD+53 2790, the optical counterpart to 4U 2206+54
Creators: name: Blay, P.
name: Ribó, M.
name: Negueruela, I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: BD+53 2790, an O9.5Vp star, is the optical counterpart to the HMXRB 4U 2206+54. This system was classified initially as a BeX, but observational evidence soon stressed the need to revise this classification. The permanent asymmetry in the H-alpha line profiles (in contrast with the cyclic variations shown by Be stars), the variations in the profile of this line in time scales of hours (while time scales from weeks to months are expected in Be stars), and the lack of correlation between IR observables and H-alpha line parameters, strongly suggest that, while BD+53 2790 contains a circunstellar disc, it is not like the one present in Be stars. Furthermore, there is evidence of overabundance of He in BD+53 2790. Together with the presence of an anomalous wind, found through UV spectroscopy, the possibility to link this star with the group of He rich stars is open. We will discuss the work done with IUE data from BD+53 2790 and the unexpected finding of a slow and dense wind, very rare for an O9.5V star.
description: 5 pages, 4 figures, accepted dor publication in Astronomy and Space Science
Empirically Evaluating Creative Arc Negotiation for Improvisational Decision-making
Creators: name: Jacob, Mikhail
name: Magerko, Brian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Action selection from many options with few constraints is crucial for improvisation and co-creativity. Our previous work proposed creative arc negotiation to solve this problem, i.e., selecting actions to follow an author-defined `creative arc' or trajectory over estimates of novelty, unexpectedness, and quality for potential actions. The CARNIVAL agent architecture demonstrated this approach for playing the Props game from improv theatre in the Robot Improv Circus installation. This article evaluates the creative arc negotiation experience with CARNIVAL through two crowdsourced observer studies and one improviser laboratory study. The studies focus on subjects' ability to identify creative arcs in performance and their preference for creative arc negotiation compared to a random selection baseline. Our results show empirically that observers successfully identified creative arcs in performances. Both groups also preferred creative arc negotiation in agent creativity and logical coherence, while observers enjoyed it more too.
description: 10 pages, 5 figures, 8 tables, accepted to ACM Creativity & Cognition 2021, Best Paper Award
Similarity Renormalization Group Evolution of Many-Body Forces in a One-Dimensional Model
Creators: name: Jurgenson, E. D.
name: Furnstahl, R. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A one-dimensional system of bosons with short-range repulsion and mid-range attraction is used as a laboratory to explore the evolution of many-body forces by the Similarity Renormalization Group (SRG). The free-space SRG is implemented for few-body systems in a symmetrized harmonic oscillator basis using a recursive construction analogous to no-core shell model implementations. This approach, which can be directly generalized to three-dimensional nuclei, is fully unitary up to induced A-body forces when applied with an A-particle basis (e.g., A-body bound-state energies are exactly preserved). The oscillator matrix elements for a given A can then be used in larger systems. Errors from omitted induced many-body forces show a hierarchy of decreasing contribution to binding energies. An analysis of individual contributions to the growth of many-body forces demonstrates such a hierarchy and provides an understanding of its origins.
description: 23 pages, 11 figures, Changed section on analysis of three-body running
Supercapacitor Assisted (SCA)Techniques for Power Conversion and Protection Applications Slides
Creators: Nihal Kularatna
Publisher: name: IEEE
Year: 2019

PELS Webinar Slides
Abstract- During the last two decades, electronics industry has seen many commercial versions of electrical double layer capacitors (EDLC), which are also known as ultra-capacitors and supercapacitors, with the aim of complementing or replacing electrochemical batteries. EDLCs come in capacitance values from 0.2 to 7500 farads, with the limitation of very low DC voltage ratings from 0.7 V to 4 V. An EDLC gives an approximately one million times larger capacitance compared to an electrolytic. Recently some SC manufacturers have introduced a novel family of �supercap-batteries� where capacitance has gone up to 70,000 F.  Compared to conventional capacitors with large DC voltage ratings, EDLCs offer one to two order greater energy density and approximately twice the power density.
Supercapacitors can be the basis for non-traditional and novel circuit topologies to achieve: significantly high energy efficiency in DC-DC converters; surge protection; rapid energy transfer; high density inverters and renewable energy converters with DC-UPS capability. Seminar will present a discussion on how to develop unique solutions to well-known issues in power electronics, with the examples of developing many patented or patent pending SC assisted (SCA) techniques such as SCA low dropout regulator (SCALDO), SCA surge absorber (SCASA), SCA temperature modification apparatus (SCATMA), SCA high density inverter (SCAHDI) and SCA light emitting diodes (SCALED). Industrial applications of these SCA techniques will be discussed including their application in DC Microgrid area.
Bio- Nihal Kularatna is an Associate Professor in the School of Engineering at the University of Waikato, New Zealand. He won the New Zealand Innovator of the year award (2013). His electronic engineering career spans 43 years and he is active in research in supercapacitor applications, power supply topologies, and power conditioning. He has contributed to over 150 papers and nine reference books. His important contributions include two IET Electrical Measurement Series books titled Modern electronic test & measuring instruments (1996) and Digital and analogue instrumentation- testing and measurement (2003/2008) and three Elsevier (USA) titles. His recent research monograph on surge protection systems, titled Design of Transient Protection Systems, was published by Elsevier in 2018, summarizing his commercially oriented research on his SCASA technique. Multiple patents were granted for his supercapacitor assisted (SCA) circuit topologies.  Before migrating to New Zealand in 2002, he was the CEO of the Arthur C Clarke Institute in Sri Lanka.
New Advances in State-Space based Control of Power Converters-Slides
Creators: Dorin Neacsu
Publisher: name: IEEE
Year: 2020

PELS Webinar Slides
Abstract: This webinar is presenting new advances on the deployment of digital control systems based on state-space feedback control (also referred to as "modern control") to power converters. The State Space based modelling allows implementation of both feedback control and additional features due to its inherent time-domain character. The presentation reviews briefly the typical design steps for a State Space based controller, including state-space modeling, averaging, optimal selection of pole location for feedback control, reference introduction into the state-space form, and use of both an integrator and feed-forward components for achievement of dynamic and steady-state performance. This introduction is followed through with comments related to digital implementation, which make a difference between fixed-point and floating-point computing platforms. Since the performance is influenced by the operation point considered in model, a method for adaptive gain change is next discussed. The last part of the webinar concerns design of full- and reduced-order state estimation, including observer's pole selection, equations, and offline parameters for implementation. Applications of such observers to both current sensor-less control and fault detection (either catastrophic faults or slow deterioration due to ageing) are included as ultimate proceedings. The webinar benefits from support with MATLAB® analysis and a Microchip® platform implementation.
Advancing Layout Tools to Support High Performance-High Frequency Power Electronic Design-Slides
Creators: Eckart Hoene
Publisher: name: IEEE
Year: 2020

PELS Webinar Slides
Abstract: Routing power electronic circuits for high speed switching becomes very tricky, as parasitic effects gain relevance and influence system performance significantly. For example some parts of the circuit have to be routed with low inductance, others for low coupling capacitance, proximity effects dominate losses and so on. Although there are tools to calculate these kind of effects it is not straight forward to use them during the design process. The transfer of the layout data to the calculation tool works seldom without rework and the tools need special knowledge to get the right results. Layout tool integrated evaluation features may offer a way out of this obstruction.

In the webinar the performance relevant parasitics are gathered and ways to handle them in layout tools discussed. Solutions for ohmic losses in arbitrarily formed tracks and inductance are demonstrated
AI Inspired Control- Design and Cyber Security of Converter based Power Systems-Slides
Creators: Tomislav Dragicevic
Publisher: name: IEEE
Year: 2020

PELS Webinar Slides
Abstract: Power electronics technology is in the heart of the ongoing green transition. In particular, power electronic converter systems (PELS) serve as grid interfaces to renewable energy sources, storage systems, electrical vehicles, and flexible loads. Therefore, as fundamental building blocks, power converters will not only have a major effect on the efficiency and reliability of future power systems, but will also be in charge of ensuring their stable and secure operation. Challenges such as decreased system inertia, static voltage deviations and dynamic voltage instability arise in this scenario and they can be partially solved through effective control, design and placement of PELS in future power systems. Moreover, a well-coordinated cooperative effort of many PELS requires tight coupling of power electronics with advanced computation and communication technologies. This will make the power-converter based system increasingly vulnerable to cyber-attacks. This lecture will discuss some of the research challenges mentioned above and present several recent research results where artificial intelligence (AI) inspired solutions have been developed. Lecture will also discuss future research directions in the field of AI applied to converter-based power systems.