The maximum detectable velocity of high-frame-rate color flow Doppler ultrasound is limited by the imaging frame rate when using coherent compounding techniques. Traditionally, high quality ultrasonic images are produced at a high frame rate via coherent compounding of steered plane wave reconstructions. However, this compounding operation results in an effective downsampling of the slow-time s...

We generalize the Unruh-DeWitt detector model to second quantization. illustrate this by applying it an excited particle in a superposition of relativistic velocities. calculate, first order, how its decay depends on whether velocities is coherent or incoherent. Further, we framework quantum reference frames allow transformations rest second-quantized Unruh DeWitt detectors. As application, sho...

This paper proposes a new space-time coding scheme for non-coherent MIMO systems. In this scheme, called Matrix Coded Modulation (MCM), a joint channel errorcorrecting code and space-time code is considered. Coherent systems are those for which Channel State Information (CSI) is available at the transmitters and/or at the receivers, and their performance strongly depend on the channel estimatio...

Coherent eta photoproduction on the deuteron is studied in the S 11 resonance region neglecting eta rescattering and two-body processes. For the elementary reaction on the nucleon, we have considered the dominant S 11 (1535) resonance and as background the nucleon pole terms as well as and ! meson exchange. We have studied the innuence of diierent choices for the neutron resonance amplitude, di...

Coorbit space theory is an abstract approach to function spaces and their atomic decompositions. The original theory developed by Feichtinger and Gröchenig in the late 1980ies heavily uses integrable representations of locally compact groups. Their theory covers, in particular, homogeneous Besov-Lizorkin-Triebel spaces, modulation spaces, Bergman spaces and the recent shearlet spaces. However, ...

We apply the orthonormalization procedure previously introduced by two of us and adopted in connection with coherent states to Gabor frames and other examples. For instance, for Gabor frames we show how to construct g(x) ∈ L2(R) in such a way the functions gn(x) = e 1g(x+an2), n ∈ Z2 and a some positive real number, are mutually orthogonal. We discuss in some details the role of the lattice nat...

This paper deals with the evaluation of a stochastic component for natural language understanding alternatively trained on semantic and syntactic-semantic labels. The parser uses semantically-labeled speech data gathered using the LIMSI-ARISE interactive speech system for train travel information retrieval in French. The study shows that introducing additional and coherent information into the ...

this paper is a continuation of [uniformities and covering properties for partial frames (i)], in which we make use of the notion of a partial frame, which is a meet-semilattice in which certain designated subsets are required to have joins, and finite meets distribute over these. after presenting there our axiomatization of partial frames, which we call $sels$-frames, we added structure, in th...

partial frames provide a rich context in which to do pointfree structured and unstructured topology. a small collection of axioms of an elementary nature allows one to do much traditional pointfree topology, both on the level of frames or locales, and that of uniform or metric frames. these axioms are sufficiently general to include as examples bounded distributive lattices, $sigma$-frames, $ka...

We present the architecture and design of a new transponder to support deepspace and near-Earth missions in the post-2010 time frame. This transponder is designed to provide direct-to-Earth command and telemetry service; spacecraftto-spacecraft command and telemetry service; direct-to-Earth navigation in the form of coherent Doppler turnaround, sequential turn-around ranging, pseudo-noise regen...