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Mathematical Aspects of Paradoxes in Cosmology: Can Mathematics Explain the Contemporary Cosmological Crisis?

Posted By: AvaxGenius
Date: 7 Jul 2023 10:21:31
Mathematical Aspects of Paradoxes in Cosmology: Can Mathematics Explain the Contemporary Cosmological Crisis?

Mathematical Aspects of Paradoxes in Cosmology: Can Mathematics Explain the Contemporary Cosmological Crisis? by Michal Křížek , Lawrence Somer
English | PDF EPUB (True) | 2023 | 270 Pages | ISBN : 303131767X | 27.3 MB

This book provides a mathematical and numerical analysis of many problems which lead to paradoxes in contemporary cosmology, in particular, the existence of dark matter and dark energy. It is shown that these hypothetical quantities arise from excessive extrapolations of simple mathematical models to the whole physical universe. Written in a completely different style to most books on General Relativity and cosmology, the important results take the form of mathematical theorems with precise assumptions and statements. All theorems are followed by a corresponding proof, or an exact reference to the proof.
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The First Law of Mechanics in General Relativity & Isochrone Orbits in Newtonian Gravity

Posted By: AvaxGenius
Date: 1 May 2023 12:19:21
The First Law of Mechanics in General Relativity & Isochrone Orbits in Newtonian Gravity

The First Law of Mechanics in General Relativity & Isochrone Orbits in Newtonian Gravity by Paul Ramond
English | EPUB (True) | 2023 | 408 Pages | ISBN : 3031179633 | 40.6 MB

The thesis tackles two distinct problems of great interest in gravitational mechanics — one relativistic and one Newtonian. The relativistic one is concerned with the "first law of binary mechanics", a remarkably simple variational relation that plays a crucial role in the modern understanding of the gravitational two-body problem, thereby contributing to the effort to detect gravitational-wave signals from binary systems of black holes and neutron stars. The work reported in the thesis provides a mathematically elegant extension of previous results to compact objects that carry spin angular momentum and quadrupolar deformations, which more accurately represent astrophysical bodies than mere point particles.
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The First Law of Mechanics in General Relativity & Isochrone Orbits in Newtonian Gravity

Posted By: AvaxGenius
Date: 1 May 2023 11:12:10
The First Law of Mechanics in General Relativity & Isochrone Orbits in Newtonian Gravity

The First Law of Mechanics in General Relativity & Isochrone Orbits in Newtonian Gravity by Paul Ramond
English | PDF (True) | 2023 | 408 Pages | ISBN : 3031179633 | 7.2 MB

The thesis tackles two distinct problems of great interest in gravitational mechanics — one relativistic and one Newtonian. The relativistic one is concerned with the "first law of binary mechanics", a remarkably simple variational relation that plays a crucial role in the modern understanding of the gravitational two-body problem, thereby contributing to the effort to detect gravitational-wave signals from binary systems of black holes and neutron stars. The work reported in the thesis provides a mathematically elegant extension of previous results to compact objects that carry spin angular momentum and quadrupolar deformations, which more accurately represent astrophysical bodies than mere point particles.
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Metallurgy in Space: Recent Results from ISS

Posted By: AvaxGenius
Date: 31 Aug 2022 18:01:35
Metallurgy in Space: Recent Results from ISS

Metallurgy in Space: Recent Results from ISS by Hans-Jörg Fecht, Markus Mohr
English | EPUB | 2022 | 564 Pages | ISBN : 3030897834 | 89.2 MB

This book presents experimental work conducted on the International Space Station (ISS) in order to characterize metals and alloys in the liquid state. The internationally recognized authors present and discuss experiments performed in microgravity that enabled the study of the relevant volume and surface related properties free of the restrictions of a gravity-based environment. The collection serves also as a handbook of space experiments using electromagnetic levitation techniques. A summary of recent results provides an overview of the wealth of space experiment data, which will ignite further research activities and inspire academics and industrial research departments for their continuous development.
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Laser Power Stabilization via Radiation Pressure

Posted By: AvaxGenius
Date: 28 Apr 2022 21:55:51
Laser Power Stabilization via Radiation Pressure

Laser Power Stabilization via Radiation Pressure by Marina Trad Nery
English | PDF,EPUB | 2022 | 170 Pages | ISBN : 3030958671 | 52.4 MB

This book offers a comprehensive and complete description of a new scheme to stabilize the power of a laser on a level needed for high precision metrology experiments. The novel aspect of the scheme is sensing power fluctuations via the radiation pressure driven motion they induce on a micro-oscillator mirror. It is shown that the proposed technique can result in higher signals for power fluctuations than what is achieved by a direct power detection, and also that it enables the generation of a strong bright squeezed beam.
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