volume oscillations
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Neutron-star oscillations — Asteroseismology studies the internal structure of our Sun and other stars using oscillations. These can be studied by interpreting the temporal frequency spectrum acquired through observations [cite journal|… … Wikipedia
Insulin oscillations — The insulin concentration in blood increases after meals and gradually returns to basal levels during 1 2 hours. However, the basal insulin level is not stable. It oscillates with a regular period of 3 6 min. After a meal the amplitude of these… … Wikipedia
Representative elementary volume — In hydrogeology, the representative elementary volume (REV) is the smallest volume over which a measurement can be made that will yield a value representative of the whole. Below REV, the parameter is not defined and the material can not be… … Wikipedia
Invention of radio — Great Radio Controversy redirects here. For the album by the band Tesla, see The Great Radio Controversy. Contents 1 Physics of wireless signalling 2 Theory of electromagnetism … Wikipedia
The Dark Energy Survey — DES logo The Dark Energy Survey (DES) is a survey that aims to probe the dynamics of the expansion of the universe and the growth of large scale structure. The collaboration is composed of research institutes and universities from United… … Wikipedia
SYSTÈMES DYNAMIQUES DIFFÉRENTIABLES — Sans doute née avec le mémoire que Poincaré écrivit en 1881 «sur les courbes définies par des équations différentielles», où l’étude quantitative (analytique) locale des équations différentielles dans le champ complexe est remplacée par leur… … Encyclopédie Universelle
PLASMAS — Le terme «plasma» a été introduit en physique en 1923 par les physiciens américains Irving Langmuir et Levi Tonks pour désigner, dans les tubes à décharge (cf. état GAZEUX), certaines régions équipotentielles contenant un gaz ionisé… … Encyclopédie Universelle
Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… … Universalium
Quantitative models of the action potential — In neurophysiology, several mathematical models of the action potential have been developed, which fall into two basic types. The first type seeks to model the experimental data quantitatively, i.e., to reproduce the measurements of current and… … Wikipedia
Theta rhythm — Theta rhythms are one of several characteristic electroencephalogram (EEG) waveforms associated with various sleep and wakefulness states of the brain. When measured in this fashion, they are between 4 and 8 Hz, and involve many neurons firing… … Wikipedia
BKL singularity — A BKL (Belinsky Khalatnikov Lifshitz) singularityHarvnb|Belinsky|Khalatnikov|Lifshitz|1970] is a model of the dynamic evolution of the Universe near the initial singularity, described by a non symmetric, chaotic, vacuum solution to Einstein s… … Wikipedia
