Results 21 to 30 of about 795,847 (338)
Photo-excited Carrier Dynamics and Impact Excitation Cascade in Graphene [PDF]
Phys. Rev. B 87, 155429 (2013), 2012 Photo-excitation in solids can trigger a cascade in which multiple particle-hole excitations are generated. We analyze the carrier multiplication cascade of impact excitation processes in graphene and show that the number of pair excitations has a strong dependence on doping, which makes carrier multiplication gate-tunable.
arxiv +1 more source
Journal of Magnetic Resonance, 2017 The paper describes the design of broadband chirp excitation pulses in NMR. We first develop a three stage model for understanding chirp excitation in NMR. We then show how a chirp $ $ pulse can be used to refocus the phase of the chirp excitation pulse. The resulting magnetization still has some phase dispersion in it.
openaire +3 more sources
Hidden multiparticle excitation in weakly interacting Bose-Einstein Condensate [PDF]
Phys. Rev. A 97, 033606 (2018), 2017 We investigate multiparticle excitation effect on a collective density excitation as well as a single-particle excitation in a weakly interacting Bose--Einstein condensate (BEC). We find that although the weakly interacting BEC offers weak multiparticle excitation spectrum at low temperatures, this multiparticle excitation effect may not remain hidden,
arxiv +1 more source
Plasticity during Sleep Is Linked to Specific Regulation of Cortical Circuit Activity
Frontiers in Neural Circuits, 2017 Sleep is thought to be involved in the regulation of synaptic plasticity in two ways: by enhancing local plastic processes underlying the consolidation of specific memories and by supporting global synaptic homeostasis.
Niels Niethard +3 more
doaj +1 more source
Radially excited $U\left(1\right)$ gauged $Q$-balls [PDF]
Phys. Rev. D 102, 025010 (2020), 2020 Radially excited $U(1)$ gauged $Q$-balls are studied using both analytical and numerical methods. Unlike the nongauged case, there exists only a finite number of radially excited gauged $Q$-balls at given values of the model's parameters. Similarly to the unexcited gauged $Q$-ball, the radially excited one cannot possess the Noether charge exceeding ...
arxiv +1 more source
THE EXCITEMENT OF DISCOVERY [PDF]
Annual Review of Biochemistry, 2004 I had the good luck to start research at the dawn of molecular biology when it was possible to ask fundamental questions about the nature of the nucleic acids and how information is transferred in living systems. The search for answers led me into many different areas, often with the question of how molecular structure leads to biological function ...
openaire +2 more sources
The Journal of Physiology, 2014 Nitric oxide (NO) has multiple effects within the gastrointestinal (GI) system, including modulation of GI motility, mucosal function, inflammation and blood flow, as well as the excitability and responsiveness of vagal sensory afferents as well as vagal efferents. In this issue of The Journal of Physiology Kentish et al.
openaire +3 more sources
Balanced Noise-Evoked Excitation and Inhibition in Awake Mice CA3
Frontiers in Physiology, 2017 The hippocampus is known as a neuronal structure involved in learning, memory and spatial navigation using multi-sensory cues. However, the basic features of its response to acoustic stimuli without any behavioral tasks (conditioning) remains poorly ...
Ningqian Wang +3 more
doaj +1 more source
Open Physics, 2017 We conduct a detailed study and comparison for the one-degree-of-freedom steady-state vibrations under harmonic driving with a single fractional-order derivative and a distributed-order derivative.
Duan Jun-Sheng +2 more
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Nihon Kikai Gakkai ronbunshu, 2018 We developed a new prediction technique for dynamic stress on a bellows with low computational load, to secure the strength reliability of the multilayer bellows used in the engine exhaust system of hydraulic excavators.
Michihiro KAWASHITA +5 more
doaj +1 more source