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  • Astrophysics
  • Earth Resources and Remote Sensing
  • 1
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    EDP SCIENCES
    Publication Date: 2024-04-05
    Description: Astrophysics
    Keywords: Astrophysics ; thema EDItEUR::P Mathematics and Science::PH Physics::PHV Applied physics::PHVB Astrophysics
    Language: French
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  • 2
    Publication Date: 2024-04-05
    Description: Ideas and Methods of Supersymmetry and Supergravity: Or a Walk Through Superspace provides a comprehensive, detailed, and self-contained account of four dimensional simple supersymmetry and supergravity. Throughout the book, the authors cultivate their material in detail with calculations and full discussions of the fundamental ideas and motivations. They develop the subject in its superfield formulations but where appropriate for illustration, analogy, and comparison with conventional field theory, they use the component formulation. The book discusses many subjects that, until now, can only be found in the research literature. In addition, it presents a plethora of new results. Combining classical and quantum field theory with group theory, differential geometry, and algebra, the book begins with a solid mathematical background that is used in the rest of the book. The next chapter covers algebraic aspects of supersymmetry and the concepts of superspace and superfield. In the following chapters, the book presents classical and quantum superfield theory and the superfield formulation of supergravity. A synthesis of results and methods developed in the book, the final chapter concludes with the theory of effective action in curved superspaces. After studying this book, readers should be well prepared to pursue independent research in any area of supersymmetry and supergravity. It will be an indispensable source of reference for advanced graduate students, postdoctoral faculty, and researchers involved in quantum field theory, high energy physics, gravity theory, mathematical physics, and applied mathematics.
    Keywords: Astrophysics ; Nuclear physics ; thema EDItEUR::P Mathematics and Science::PH Physics::PHV Applied physics::PHVB Astrophysics ; thema EDItEUR::P Mathematics and Science::PH Physics::PHN Nuclear physics
    Language: English
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  • 3
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    IntechOpen | IntechOpen
    Publication Date: 2024-04-04
    Description: Gravitational waves were predicted by Albert Einstein in his most famous theory, the general theory of relativity, but it took almost a century for these waves to be detected and their existence proven. This book introduces gravitational waves and discusses some of their applications in five dimensions, this is all done in classical gravity. It also explains gravitational waves in quantum gravity (in which the universe is considered to be not continuous) and implications for trying to understand and explore dark energy and an expanding accelerated universe.
    Keywords: Linearized Theory ; Gravitational Waves Energy ; Field Approach ; Generation of Gravitational Waves ; Interferometers ; Resonant Mass Detectors ; Data Analyses Techniques ; New Detectors ; Searches ; Parameter Estimation ; Astrophysics ; Multi-Messenger Astronomy ; thema EDItEUR::P Mathematics and Science::PG Astronomy, space and time
    Language: English
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  • 4
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    Springer Nature | Springer International Publishing
    Publication Date: 2024-04-04
    Description: This is an open access book. This book, the first edited collection of its kind, explores the recent emergence of philosophical research in astrophysics. It assembles a variety of original essays from scholars who are currently shaping this field, and it combines insightful overviews of the current state of play with novel, significant contributions. It therefore provides an ideal source for understanding the current debates in philosophy of astrophysics, and it offers new ideas for future cutting-edge research. The selection of essays offered in this book addresses methodological and metaphysical questions that target a wide range of topics, including dark matter, black holes, astrophysical observations and modelling. The book serves as the first standard resource in philosophy of astrophysics for all scholars who work in the field and want to expand or deepen their knowledge, but it also provides an accessible guide for all those philosophers and scientists who are interested in getting a first, basic understanding of the main issues in philosophy of astrophysics.
    Keywords: Philosophy of astrophysics ; Philosophy of science ; Astrophysics ; Metaphysics and epistemology ; Simulation of the universe ; constellations and philosophy ; thema EDItEUR::P Mathematics and Science::PD Science: general issues::PDA Philosophy of science ; thema EDItEUR::P Mathematics and Science::PG Astronomy, space and time ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSA Life sciences: general issues ; thema EDItEUR::Q Philosophy and Religion::QD Philosophy::QDT Topics in philosophy::QDTK Philosophy: epistemology and theory of knowledge
    Language: English
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  • 5
    Publication Date: 2022-05-26
    Description: Reexploring convection and its various transitions to chaotic behavior were the central themes of GFD 1981. Our principal lecturer, Dr. Edward A. Spiegel, provided both a rich historical picture and stimulating hours at the current frontiers of this topic. Before the summer was out his research lecture on "A Tale of Two Methods" elegantly merged Pierre Coullet's canonical formalism for studying dynamical systems in a central manifold and the more traditional two-timing amplitude expansions near critical points. Other lecture sequences on convection and its relation to simpler dynamical systems ranged from the fine presentations of John Guckenheimer on bifurcation theory to Fritz Busse's survey of his immense contributions to our understanding of nonlinear convection. The list of other lectures found on the following pages attests to our summer-long exposure to convection in the ocean, the atmosphere, the earth's core and mantle, and in the sun. August brought lectures on new observations of convection in the laboratories of physicists. Albert Libchaber's precise experiments on the many routes convection can take to turbulence, with parallel laboratory and numerical experiments described by J. Gollub and E. Siggia, added much to our language of inquiry.
    Description: Office of Naval Research under Contract N00014-81-G-0089.
    Keywords: Convection ; Astrophysics
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
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  • 6
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    World Scientific Publishing Co.
    Publication Date: 2022-01-31
    Description: This book summarizes the science to be carried out by the upcoming Cherenkov Telescope Array, a major ground-based gamma-ray observatory that will be constructed over the next six to eight years. The major scientific themes, as well as core program of key science projects, have been developed by the CTA Consortium, a collaboration of scientists from many institutions worldwide. CTA will be the major facility in high-energy and very high-energy photon astronomy over the next decade and beyond. CTA will have capabilities well beyond past and present observatories. Thus, CTA's science program is expected to be rich and broad and will complement other major multiwavelength and multimessenger facilities. This book is intended to be the primary resource for the science case for CTA and it thus will be of great interest to the broader physics and astronomy communities. The electronic version (e-book) is available in open access.
    Keywords: Gamma Rays ; Astrophysics ; Cherenkov Telescope Array (CTA) ; Cherenkov Telescopes ; Astroparticle Physics ; Multiwavelength ; Multimessenger ; Astronomy ; Dark Matter
    Language: English
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  • 7
    Publication Date: 2022-01-31
    Description: The four volumes of the proceedings of MG14 give a broad view of all aspects of gravitational physics and astrophysics, from mathematical issues to recent observations and experiments. The scientific program of the meeting included 35 morning plenary talks over 6 days, 6 evening popular talks and 100 parallel sessions on 84 topics over 4 afternoons. Volume A contains plenary and review talks ranging from the mathematical foundations of classical and quantum gravitational theories including recent developments in string theory, to precision tests of general relativity including progress towards the detection of gravitational waves, and from supernova cosmology to relativistic astrophysics, including topics such as gamma ray bursts, black hole physics both in our galaxy and in active galactic nuclei in other galaxies, and neutron star, pulsar and white dwarf astrophysics. The remaining volumes include parallel sessions which touch on dark matter, neutrinos, X-ray sources, astrophysical black holes, neutron stars, white dwarfs, binary systems, radiative transfer, accretion disks, quasars, gamma ray bursts, supernovas, alternative gravitational theories, perturbations of collapsed objects, analog models, black hole thermodynamics, numerical relativity, gravitational lensing, large scale structure, observational cosmology, early universe models and cosmic microwave background anisotropies, inhomogeneous cosmology, inflation, global structure, singularities, chaos, Einstein-Maxwell systems, wormholes, exact solutions of Einstein's equations, gravitational waves, gravitational wave detectors and data analysis, precision gravitational measurements, quantum gravity and loop quantum gravity, quantum cosmology, strings and branes, self-gravitating systems, gamma ray astronomy, cosmic rays and the history of general relativity.
    Keywords: Binary Systems ; Astrophysics ; Loop Quantum Gravity ; Gravitational Wave Detectors and Data Analysis ; Black Hole Thermodynamics ; Active Galactic Nuclei ; Observational Cosmology ; Gravitational Wave ; X-ray Sources ; Dark Matter ; General Relativity ; Cosmic Rays ; Inflation ; Numerical Relativity ; Neutrinos ; Theoretical Physics ; Large Scale Structure ; Inhomogeneous Cosmology ; Radiative Transfer ; Supernova ; Gravitation ; Black Hole ; White Dwarf ; Precision Gravitational Measurements ; Quantum Gravity ; Quantum Cosmology ; Einstein-Maxwell Systems ; String Theory ; Cosmic Microwave Background Anisotropies ; Accretion Disks ; Neutron Star ; Gravitational Lensing ; Exact Solutions of Einstein's Equations ; Early Universe Models ; Wormholes ; Cosmology ; Pulsar ; Gamma Ray Burst
    Language: English
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  • 8
    Publication Date: 2020-01-24
    Description: The NASA Global Imagery Browse Services (GIBS) and Worldview interactive mapping site leverage scientific and community best practices, open source software, and public standards to provide a scalable, compliant, and authoritative source for NASA Earth Observing System (EOS) Earth science data visualizations. GIBS and Worldview allow end users to easily and quickly interact with more than 800 full resolution pre-generated raster- and vector-based visualizations. This interactive discovery approach relies on visual observation and identification of phenomena that are not as simply identified otherwise. This eLightning presentation will exhibit the broad set of capabilities and visualization layers made possible through the GIBS and Worldview open source software. Specific dependencies on, and contributions to, open source software will be highlighted. Additionally, opportunities for future improvements for better interoperability and reuse through open source software will be discussed.
    Keywords: Earth Resources and Remote Sensing
    Type: GSFC-E-DAA-TN76098 , American Geophysical Union (AGU) Fall Meeting 2019; Dec 09, 2019 - Dec 13, 2019; San Francisco, CA; United States
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  • 9
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    In:  CASI
    Publication Date: 2020-01-24
    Description: The Alpha Jet Atmospheric eXperiment (AJAX) airborne science project based out of NASA Ames Research Center performed eight science flights in coordination with the California Baseline Ozone Transport Study (CABOTS) campaign. Many of these flights included a series of vertical profiles (~ 0-5 km) distributed roughly along either a North/South or East/West transect. Some flights also connected the fixed-location measurements at Visalia (TOPAZ ozone lidar) and Bodega Bay (ozonesondes). AJAX measured ozone, carbon dioxide, methane, water vapor, and 3-D winds on each flight, and those in situ measurements are the basis of the data sets collected here. Trace gas data sets including time and aircraft position have been delivered as comma-separated-value text files. Meteorological data (temperature, pressure and 3-dimensional winds) are provided at 1 Hz in ICARTT-compliant text files.
    Keywords: Earth Resources and Remote Sensing
    Type: ARC-E-DAA-TN77025
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  • 10
    Publication Date: 2020-01-24
    Description: Northern peatlands are an integral part of the global carbon cyclea strong sink of atmospheric carbon dioxide and source of methane. Increasing anthropogenic carbon dioxide and methane in the atmosphere are thought to strongly impact these environments, and yet, peatlands are not routinely included in Earth system models. Here we present a quantification of the sink and stock of northern peat carbon from the last glacial period through the pre-industrial period. Additional data and new algorithms for reconstructing the history of peat carbon accumulation and the timing of peatland initiation increased the estimate of total northern peat carbon stocks from 545 Gt to 1,055 Gt of carbon. Further, the post-glacial increases in peatland initiation rate and carbon accumulation rate are more abrupt than previously reported. Peatlands have been a strong carbon sink throughout the Holocene, but the atmospheric partial pressure of carbon dioxide has been relatively stable over this period. While processes such as permafrost thaw and coral reef development probably contributed some additional carbon to the atmosphere, we suggest that deep ocean upwelling was the most important mechanism for balancing the peatland sink and maintaining the observed stability.
    Keywords: Earth Resources and Remote Sensing
    Type: GSFC-E-DAA-TN74633 , Nature Geoscience (ISSN 1752-0894) (e-ISSN 1752-0908); 12; 11; 917–921
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