1,726,912 research outputs found
Hallgren Entropic Quantum Mechanics
No full textThis project presents Hallgren Entropic Quantum Mechanics (HEQM), a reformulation of quantum theory where entropy growth limits which quantum states remain physically possible. The framework replaces observer-based collapse with a causal entropy field that prunes unreachable branches from the wavefunction. HEQM offers a unified explanation for collapse, irreversibility, and the arrow of time, and makes predictions that distinguish it from standard quantum mechanics
Hallgren General Relativity: A Max-Density, Causal Stillness Model
No full textClassical General Relativity (GR) admits singularities with divergent curvature and density. I propose Hallgren General Relativity (HGR): gravitational collapse halts at a universal
maximum density ρmax enforced by causality and entropy, replacing the singularity by a finite causal stillness core of radius rcor
Hallgren Entropy and Cosmology: A First-Principles Derivation of the CMB Acoustic Peak Angle
No full textThis working paper presents a new derivation of the angular scale of the first peak in the cosmic microwave background using Hallgren General Relativity and Hallgren entropy. The model relies only on the growth of causal entropy time, without using inflation, dark energy, or Friedmann equations. By treating the sound horizon as a causal feature governed by entropy-based expansion, the predicted angular scale closely matches Planck satellite observations. All assumptions are physically standard, and no tuning or fitting is required. The result supports HGR as a predictive, entropy-driven framework for early-universe cosmology
Estimating the Causal Saturation Scale from Gravitational Wave Echoes: An Empirical Probe of Hallgren General Relativity
No full textThis project explores gravitational wave echoes as signatures of causal entropy saturation in Hallgren General Relativity (HGR). By deriving a predictive echo delay curve from a finite entropy core and calibrating it to GW150914, the model offers a falsifiable framework with a single physical parameter, testable across future black hole mergers
Erratum to Hallgren, K. A. (2012). Computing inter-rater reliability for observational data: An overview and tutorial.
No full textAn erratum was found in Hallgren, K. A. (2012). Computing inter-rater reliability for observational data: An overview and tutorial. The error and correction are presented here
Final Transcript: Art Hallgren
No full textAFL-CIO Oral History Interview final transcript with Art Hallgren by Andy Banks February 12, 1979. For complete collection information, visit the full finding aid at http://hdl.handle.net/1903.1/4247
Granskning av sakristiadörren i Hammarö medeltida träkyrka
No full textFilm, 15 minuter, på YouTubekanal: HantverkslaboratorietEn pusselbit i rekonstruktionen av Södra Råda medeltidskyrka är granskning av de liknande medeltida byggnader som ännu finns kvar. Man tittar bland annat på verktygsspår. I denna film får vi vara med när timmermännen Mattias Hallgren och Daniel Eriksson granskar dörren till sakristian i Hammarö kyrka och samtidigt filmar sin egen undersökning. En film av Mattias Hallgren, inspelad 14 december 2015, i Hammarö kyrka, Värmland. Hantverkslaboratoriet 2016
Structural Primality Criteria via Square Symmetry and Divisor Exponent Signatures
No full textWe present two novel deterministic primality criteria derived from structural properties of integers
and their squares. The first, termed the Hallgren Prime Square Count Test (HPSCT),
characterizes primes via the number of distinct multiplicative factor pairs of their square. The
second, the Hallgren Divisor Count Filter (HDCF), identifies primes by the unique product
signature of their prime exponents. Both methods are simple, fast, and accurate, showing utility
for real-world computational use and pedagogical clarity. Notably, HDCF has been shown to
outperform GMPY2 on small inputs and match SymPy, without requiring Cython, GMP, or
any compiled dependencies
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