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True 2D CMOS integrated Hall sensor

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Checkerboard order in the – model on the square lattice

Frédéric Mila, Cédric Weber, Michael Sigrist

We propose that the inhomogeneous patterns seen by STM in some underdoped superconducting cuprates could be related to a bond-order-wave instability of the staggered flux state, one of the most studied “normal” state proposed to compete with the d-wave RVB ...

2007

Accurate Real-time Feedback of Surface EMG during fMRI

Roger Gassert

Real-time acquisition of electromyography (EMG) during functional Magnetic Resonance Imaging (fMRI) provides a novel method of controlling motor experiments in the scanner using feedback of EMG. Due to the redundancy in the human muscle system this is not ...

2007

The role of calcium and magnesium in the concrete tubes of the sandcastle worm

Georg Fantner

Sandcastle worms Phragmatopoma californica build mound-like reefs by sticking together large numbers of sand grains with cement secreted from the building organ. The cement consists of protein plus substantial amounts of calcium and magnesium, which are no ...

2007

Three-Axis Teslameter with Integrated Hall Probe

Radivoje Popovic, Pavel Kejik, Enrico Schurig

The first commercially available teslameter with a fully integrated three-axis Hall probe is described. The Hall probe chip contains horizontal and vertical Hall elements, analog electronics, and a synchronization circuit. A horizontal Hall element measure ...

Institute of Electrical and Electronics Engineers2007

Semiconductor photodiode and method of making

Radivoje Popovic, Zhen Xiao

A semiconductor photodiode (18) is formed as a pn-junction between a region (2) of a first conductivity type and a region (6) of a second conductivity type. The region (6) of the second conductivity type is approximately hemispherical. A mini guard ring (8 ...

2006

Spin-Wave Interference in Microscopic Rings

Dirk Grundler

We have studied the spin excitations of ferromagnetic rings and observed a distinct series of quantized modes in the vortex state. We attribute them to spin waves that circulate around the ring and interfere constructively. They form azimuthal eigenmodes o ...

2006

On the Multiterminal Rate-Distortion Function for Acoustic Sensing

Martin Vetterli, Emre Telatar, Robert Konsbruck

We consider the rate-distortion problem for recording a Gaussian acoustic field with an array of sensors equipped with microphones. Our analysis is based on the field's spatiotemporal correlation structure, which is induced by the physics of sound propagat ...

2006

Noise-enhanced computation in a model of a cortical column

Wulfram Gerstner, Julien Mayor

Varied sensory systems use noise in order to enhance detection of weak signals. It has been conjectured in the literature that this effect, known as stochastic resonance, may take place in central cognitive processes such as memory retrieval of arithmetica ...

Lippincott, Williams & Wilkins2005

New 1-amino-1-deoxy- and 2-amino-2-deoxy-polyhydroxyazepanes: synthesis and inhibition of glycosidases

Pierre Vogel, Eliazar Rodriguez Garcia

Eight new seven-membered ring iminoalditols, displaying an amino group and a hydroxymethyl group on the ring, have been synthesized from D-arabinose via epoxidation of a protected azacycloheptene and subsequent nucleophilic opening. Three of them show a po ...

2005

Analyzing an electromechanical actuator by Schwarz-Christoffel mapping

Yves Perriard, Marcel Jufer, Miroslav Markovic

We present an application of the conformal mapping (CM) method to determine the magnetic field and force in an electromechanical actuator. First, we show how to find, using a special type of CM known as the Schwarz-Christoffel mapping, the magnetic field i ...

2004