Results 21 to 30 of about 1,794,791 (343)
Harmonic chirp imaging method for ultrasound contrast agent [PDF]
, 2005 Coded excitation is currently used in medical ultrasound to increase signal-to-noise ratio (SNR) and penetration depth. We propose a chirp excitation method\ud for contrast agents using the second harmonic component of the response.
Associate Member +5 more
core +5 more sources
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.
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Layer Specific Development of Neocortical Pyramidal to Fast Spiking Cells Synapses.
Frontiers in Cellular Neuroscience, 2016 All cortical neurons are engaged in inhibitory feedback loops which ensure excitation-inhibition balance and are key elements for the development of coherent network activity.
Olga eVoinova +6 more
doaj +1 more source
Excitation Spectrum in the Friedberg-Lee Model [PDF]
, 2001 The excitation spectrum of the nucleon with the spin 1/2 is examined by using the Friedberg-Lee model containing the constituent quark and the scalar meson. An appropriate way of quantization for the non-linear meson field is employed by taking account
Arima, M., Kowata, H.
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Transform-Limited-Pulse Representation of Excitation with Natural Incoherent Light [PDF]
, 2015 We study the natural excitation of molecular systems, applicable to, for example, photosynthetic light-harvesting complexes, by natural incoherent light.
Aurélia Chenu +6 more
core +2 more sources
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
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 ...
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Roper Excitation in Alpha-Proton Scattering [PDF]
, 1995 We study the Roper excitation in the $(\alpha,\alpha')$ reaction. We consider all processes which may be relevant in the Roper excitation region, namely, Roper excitation in the target, Roper excitation in the projectile, and double $\Delta$ excitation ...
B. Desplanques +13 more
core +2 more sources
Momentum-resolved charge excitations in high-Tc cuprates studied by resonant inelastic x-ray scattering [PDF]
, 2007 We report a Cu K-edge resonant inelastic x-ray scattering (RIXS) study of high-Tc cuprates. Momentum-resolved charge excitations in the CuO2 plane are examined from parent Mott insulators to carrier-doped superconductors.
Collart +45 more
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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.
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