Results 1  10
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23,655
Brain magnetic resonance imaging with contrast dependent on blood oxygenation.
 Proc. Natl. Acad. Sci. USA
, 1990
"... ABSTRACT Paramagnetic deoxyhemoglobin in venous blood is a naturally occurring contrast agent for magnetic resonance imaging (MRI). By accentuating the effects of this agent through the use of gradientecho techniques in high fields, we demonstrate in vivo images of brain microvasculature with imag ..."
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Cited by 648 (1 self)
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/cm (1 G = 0.1 mT). The slice width of the images shown was 500 ,4m and the inplane pixel size was 117 ,um X Abbreviations: MRI, magnetic resonance imaging; BOLD, blood oxygenation leveldependent; EEG, electroencephalogram. 9868 The publication costs of this article were defrayed in part by page charge
A quantitative description of membrane currents and its application to conduction and excitation in nerve
 Journal of Physiology
, 1952
"... This article concludes a series of papers concerned with the flow of electric current through the surface membrane of a giant nerve fibre (Hodgkin, Huxley & Katz, 1952; Hodgkin & Huxley, 1952 ac). Its general object is to discu the results of the preceding papers (Part I), to put them into ..."
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Cited by 1924 (2 self)
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This article concludes a series of papers concerned with the flow of electric current through the surface membrane of a giant nerve fibre (Hodgkin, Huxley & Katz, 1952; Hodgkin & Huxley, 1952 ac). Its general object is to discu the results of the preceding papers (Part I), to put them
ElectricMagnetic duality and the geometric Langlands program
, 2006
"... The geometric Langlands program can be described in a natural way by compactifying on a Riemann surface C a twisted version of N = 4 super YangMills theory in four dimensions. The key ingredients are electricmagnetic duality of gauge theory, mirror symmetry of sigmamodels, branes, Wilson and ’t H ..."
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Cited by 294 (26 self)
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The geometric Langlands program can be described in a natural way by compactifying on a Riemann surface C a twisted version of N = 4 super YangMills theory in four dimensions. The key ingredients are electricmagnetic duality of gauge theory, mirror symmetry of sigmamodels, branes, Wilson and ’t
Black Hole Entropy Function, Attractors and Precision Counting of Microstates
, 2007
"... In these lecture notes we describe recent progress in our understanding of attractor mechanism and entropy of extremal black holes based on the entropy function formalism. We also describe precise computation of the microscopic degeneracy of a class of quarter BPS dyons in N = 4 supersymmetric strin ..."
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Cited by 324 (28 self)
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string theories, and compare the statistical entropy of these dyons, expanded in inverse powers of electric and magnetic charges, with a similar expansion of the corresponding black hole entropy. This comparison is extended to include the contribution to the entropy from multicentered black holes
Smart Dust: Communicating with a CubicMillimeter Computer
 Classical Papers on Computational Logic
, 2001
"... building virtual keyboards; . managing inventory control; . monitoring product quality; . constructing smart office spaces; and . providing interfaces for the disabled. SMART DUST REQUIREMENTS Smart Dust requires both evolutionary and revolutionary advances in miniaturization, integration, an ..."
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Cited by 319 (3 self)
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of a Smart Dust mote. The power system consists of a thickfilm battery, a solar cell with a chargeintegrating capacitor for periods of darkness, or both. Depending on its objective, the design integrates various sensors, including light, temperature, vibration, magnetic field, acoustic, and wind
Galilean Invariance and Magnetic Charge
, 1975
"... Abstract The Galilean and 'dual' invariant electrodynamics with magnetic charges is formulated. The definition of the main feature of relativistic electromagnetism is given. Consideration of different aspects of Galilean electromagnetism with magnetic charges is presented. It is shown in ..."
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in particular that the conclusion of Bacry & KubarAndre (1973) that the existence of the magnetic monopole is incompatible with Galilean invariance in general appears to be incorrect. There jq (jg) is the density of electric (magnetic) current, pq (pg) is the density of electric (magnetic) charge, (cp, j
Corrections to Macroscopic Supersymmetric BlackHole Entropy
, 1998
"... We determine the corrections to the entropy of extremal black holes arising from terms quadratic in the Riemann tensor in N = 2; D = 4 supergravity theories. We follow Wald's proposal to modify the BekensteinHawking area law. The new entropy formula, whose value only depends on the electric/ma ..."
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Cited by 169 (15 self)
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charges, is expressed in terms of a single holomorphic function and is consistent with electricmagnetic duality. For string effective field theories arising from CalabiYau compactifications, our result for the entropy of a certain class of extremal blackhole solutions fully agrees with the counting
Lectures on supersymmetric gauge theories and electricmagnetic duality
, 1995
"... We review some of the recent work on the dynamics of four dimensional, supersymmetric gauge theories. The kinematics are largely determined by holomorphy and the dynamics are governed by duality. The results shed light on the phases of gauge theories. Some results and interpretations which have not ..."
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Cited by 196 (19 self)
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We review some of the recent work on the dynamics of four dimensional, supersymmetric gauge theories. The kinematics are largely determined by holomorphy and the dynamics are governed by duality. The results shed light on the phases of gauge theories. Some results and interpretations which have not been published before are also included.
Brane dynamics from the BornInfeld action,” Nucl
 Phys. B
, 1998
"... We use the abelian BornInfeld action for the worldvolume gauge field and transverse displacement scalars to explore new aspects of Dbrane structure and dynamics. We study several classic gauge field configurations, including point charges in any worldvolume dimension and vortices in two worldvolum ..."
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Cited by 249 (4 self)
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worldvolume dimensions, and show that, with an appropriate excitation of the transverse coordinate field, they are BPSsaturated solutions. The Coulomb point charge solutions turn out to represent, with considerable fidelity, fundamental strings attached to the brane (their magnetic counterparts describe D1
Results 1  10
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23,655