G
Giampaolo D'Alessandro
Researcher at University of Southampton
Publications - 116
Citations - 1933
Giampaolo D'Alessandro is an academic researcher from University of Southampton. The author has contributed to research in topics: Liquid crystal & Photorefractive effect. The author has an hindex of 18, co-authored 98 publications receiving 1806 citations. Previous affiliations of Giampaolo D'Alessandro include University of Strathclyde & Centre national de la recherche scientifique.
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Dual Effect of High-Frequency Stimulation on Subthalamic Neuron Activity
TL;DR: It is suggested that this pattern may remove the deleterious activity of the basal ganglia network in the parkinsonian state and drive target neurons to a high-frequency state of activity, dependent on the characteristics of STN efferent synapses and resonant properties of target membranes.
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High-frequency stimulation in Parkinson's disease: more or less?
TL;DR: It is suggested that HFS switches off a pathological disrupted activity in the STN and imposes a new type of discharge in the upper gamma-band frequency that is endowed with beneficial effects, which is pivotal in the operation of these circuits in health and disease.
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Spontaneous hexagon formation in a nonlinear optical medium with feedback mirror.
TL;DR: The authors' simulations show that the uniform plane-wave solution deforms for sufficient pump intensity into a nonuniform pattern of hexagonal symmetry, independently of the sign of the nonlinearity, a feature which may be generic for third-order nonlinear optical systems.
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Hexagonal spatial patterns for a Kerr slice with a feedback mirror.
TL;DR: Analytically and numerically a very simple nonlinear optical system, a thin slice of Kerr material with a single feedback mirror, shows that for both a focusing and defocusing medium the plan-wave solution is unstable above a certain input intensity, and a hexagonal pattern of bright spots should form.
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Macroscopic optical effects in low concentration ferronematics
Nina Podoliak,Oleksandr Buchnev,O. Buluy,Giampaolo D'Alessandro,Malgosia Kaczmarek,Yuriy Reznikov,Timothy J. Sluckin +6 more
TL;DR: In this paper, a detailed experimental and theoretical study of the optical response of suspensions of ferromagnetic nanoparticles (ferroparticles) in nematic liquid crystals (ferronematics) concentrating on the magnetic field-induced Frederiks transition is presented.