Results 171 to 180 of about 16,280 (210)
Ultralight repulsive dark matter and BEC [PDF]
Physics of the Dark Universe, 2016 Ultralight scalar dark matter with mass at or below the eV scale and pressure from repulsive self-interaction could form a Bose-Einstein condensate in the early Universe and maybe in galaxies as well. It has been suggested to be a possible solution to the cusp/core problem or even to explain MOND phenomenology.
Jiji Fan
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Acoustics of ultralight airplanes
Journal of Aircraft, 1990In view of the stringent noise limits that have been imposed on ultralight airplanes, an experimental and theoretical research program was initiated to investigate specifically the noise sources of ultralight airplanes. For this purpose, flyover and ground static noise measurements on tractor- and pusher-propeller-driven airplane configurations and ...
Hanno Heller +2 more
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Ultralight loudspeaker enclosures
The Journal of the Acoustical Society of America, 1992A loudspeaker and enclosure assembly, comprising: a load bearing member exhibiting good thermal conductivity; at least one loudspeaker mounted on the load bearing member and in thermal engagement therewith; and, an enclosure having walls formed of rigid light-weight material mounted on the load bearing member to enclose the at least one loudspeaker ...
Clifford Henricksen, John Lemon
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Simulating Ultralight Dark Matter in Chapel
2020 IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW), 2020This talk summarizes the development of a Chapel astrophysics code to simulate the dynamics of ultralight dark matter. The talk has three broad goals - (i) to demonstrate that current versions of Chapel can achieve good performance and scalability for real-world workloads, (ii) to describe the experience of writing a research code in Chapel, and (iii ...
Nikhil Padmanabhan +3 more
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The Journal of the Acoustical Society of America, 2008
An ultra light, noise reducing composite (1) comprises an acoustically transparent, light weight film (6) between an underlay layer (5) and an air flow resistance layer (4). This composite allows to easily tune the acoustic properties by balancing the absorption and sound transmission behaviour of the composite (1).
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An ultra light, noise reducing composite (1) comprises an acoustically transparent, light weight film (6) between an underlay layer (5) and an air flow resistance layer (4). This composite allows to easily tune the acoustic properties by balancing the absorption and sound transmission behaviour of the composite (1).
openaire +1 more source
Ultralight Axions in Cosmology
2023Ultralight axions (ULAs) play a tremendously important role in understanding several aspects of cosmology. The presence of the ULA field is promising to resolve several tensions of the standard A-cold-dark-matter model. Firstly, ULA with mass m a , ≈ 10 -22 eV, which is usually referred to as fuzzy dark matter (FDM), has long been treated as a highly ...
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Ultralight Aircraft Fatalities
The American Journal of Forensic Medicine and Pathology, 1987A study of ultralight aircraft fatalities was performed based on the cases files of the Office of the Medical Examiner of Metropolitan Dade County in Miami, Florida. A total of five cases were collected during the years 1981-1985. These are presented in some detail.
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2013
Scoperta nel 2009 nell’ambito della Sloan Digital Sky Survey, la galassia nana Segue 2 ha una massa almeno dieci volte inferiore a quanto stimato in precedenza: nemmeno mille stelle. Misura che l’attesta come la più piccola fra quelle note.
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Scoperta nel 2009 nell’ambito della Sloan Digital Sky Survey, la galassia nana Segue 2 ha una massa almeno dieci volte inferiore a quanto stimato in precedenza: nemmeno mille stelle. Misura che l’attesta come la più piccola fra quelle note.
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Ultralight Electrolyte for High‐Energy Lithium–Sulfur Pouch Cells
Angewandte Chemie - International Edition, 2021Jingnan Feng +2 more
exaly
An Ultralight Capillary-Driven Heat Pipe
LangmuirCapillary-driven heat pipes are an effective thermal solution for compacting electronic cooling systems. We advance such a heat pipe thermal solution with ultralightweighting for mobile applications. In our advancement, the envelope that encapsulates the phase-change process of a working fluid is fabricated via electroless plating being ∼40 μm thick ...
Yong Ju Lee +5 more
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