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| viXra.org > Mathematical Physics > 2311 |
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[5] viXra:2311.0134 [pdf] replaced on 2024-01-10 21:46:32
Authors: Shlomy Shitrit, Royee Bustan
Comments: 18 Pages.
Miniature crycoolers are small refrigerators that can reach cryogenic temperatures in the range of 60K to 150K. They have the capability of accumulating a small temperature drop into a large overall temperature reduction. The cooldown time estimation is becoming more and more as a design parameter, certainly in hands-on applications. The various complicated physical processes involved in crycooler operation make it hardly possible to explicitly simulate the temperature time response. The numerical methods for solving a typical crycooler suffer from numerical instability,time step restrictions and high computational costs, among others. Since the operation of crycoolers involve processes in range of 15Hz−120Hz, actually solving the crycooler transient response would require different software tools to support the design and analysis of physical processes such as heat transfer, fluid dynamic, electromagnetic and mechanical. These processes would also require an excessive amount of calculations, incurring time consuming and precision penalty. In thisarticle we try to bridge the gap between the explicit impractical approach to steady state based approach. A framework developed in Python for calculating the cooldown time profile of anycrycooler based on a steady state database, is introduced, while utilizing a semi-analytic approach under various operating conditions. The cooldown time performance can be explored at various target and ambient temperature conditions, and also the effects of an external load, material properties or thermal capacitance on the overall cooldown time response. Two case studies based on linear and rotary crycoolers developed at Ricor are used for verfication, with a good agreement between the simulated and measured values.
Category: Mathematical Physics
[4] viXra:2311.0104 [pdf] submitted on 2023-11-21 05:08:00
Authors: Robert G. Wallace
Comments: 19 Pages.
By imposing a requirement for spatial isotropy, it is possible to find an algebra with a subalgebra structure having a pattern matching that of the bosons and three families of fermions of the standard model.
Category: Mathematical Physics
[3] viXra:2311.0037 [pdf] replaced on 2025-05-22 10:19:28
Authors: Alfonso De Miguel bueno
Comments: 41 Pages.
This paper presents a novel interacting fields model that reconceptualizes the neutron as an intermediate state linking proton and antiproton transformations, incorporating antimatter and dark matter into nucleon dynamics.Within an octonionic framework, the model offers a geometric interpretation of QCD and its unification with weak and electromagnetic interactions.It proposes a curvature-based mechanism for the emergence of mass, charge, and fundamental interactions, leading to several quantitative predictions, including a geometric explanation of the fine-structure constant, Planck’s constant, and the Higgs boson.
Category: Mathematical Physics
[2] viXra:2311.0029 [pdf] submitted on 2023-11-06 14:37:53
Authors: Michael Griffin
Comments: 12 Pages. contact email mdg46@juno.com
More features are presented to fit a single-field version for a unified field theory, based upon Euler’s equation as the hidden variable to model enfielding of energy into matter.The spin values and their range spectrum are revised to fit estimates for the different magnitudes of gravity and electromagnetism. Features of Maxwell’s equations on a larger scale are considered. A conservation principle for total velocities is also proposed. Force constants and a different simultaneity principle are suggested.
Category: Mathematical Physics
[1] viXra:2311.0005 [pdf] submitted on 2023-11-01 21:32:59
Authors: Lucian M. Ionescu
Comments: 36 Pages. Presentation in the ISU Pure and Applied Mathematics Seminar
Rational numbers Q have much more structure beyond the ordered field structure which leads to Real Numbers as a metric completion.The modular group representation of continued fractions is used as a Number Theory "friendly" implementation of the real numbers, with a possible unification with p-adic numbers, beyond the "direct sum" adeles framework. This approach also allows to extend Fourier and Haar Wavelet Analysis, by including inversion as a geometric antipode. Other applications in Mathematical-Physics steam from the central role of the modular group: Belyi maps, Farey graphs and tessellations etc. which allow the study of important classes of numbers (algebraic, periods) in a systematic way. The presentation is a preliminary version the project, stating the motivation, goals and approach.
Category: Mathematical Physics
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