Results 91 to 100 of about 86,909 (315)

CCSDS telemetry channel coding: the turbo coding option [PDF]

open access: green, 1998
Gian Paolo Calzolari   +2 more
openalex   +1 more source

RF shimming strategy for an open 60‐channel RF transmit 7T MRI head coil for routine use on the single transmit mode

open access: yesMagnetic Resonance in Medicine, EarlyView.
Abstract Purpose To develop an radiofrequency (RF) shimming approach for operating the 2nd Generation Tic Tac Toe RF coil system (60 transmit channels integrated with 32‐channel receive insert) for routine use in 7T neuro MRI on the single transmit mode.
Andrea N. Sajewski   +8 more
wiley   +1 more source

Overspeeding characteristics of turbomachinery for gas generator cycle air turbo ramjet engine

open access: yesPropulsion and Power Research, 2022
The main interest in the current study focuses on the possibility of overspeeding for the gas-generator cycle air turbo ramjet (GG-ATR) engine. The authors developed the air turbo ramjet engine and investigated its compressor performance.
Ryojiro Minato   +4 more
doaj  

Good Concatenated Code Ensembles for the Binary Erasure Channel

open access: yes, 2009
In this work, we give good concatenated code ensembles for the binary erasure channel (BEC). In particular, we consider repeat multiple-accumulate (RMA) code ensembles formed by the serial concatenation of a repetition code with multiple accumulators ...
Amat, Alexandre Graell i, Rosnes, Eirik
core   +3 more sources

Multidimensional RF pulse design using auto‐differentiable spin‐domain optimization and its application to reduced field‐of‐view imaging

open access: yesMagnetic Resonance in Medicine, EarlyView.
Abstract Purpose Develop a general radiofrequency (RF) pulse design algorithm for the design of three‐dimensional (3D) spatially selective refocusing pulses and explore their potential applications in reduced field‐of‐view imaging. Methods Spin‐domain representation was used to describe the effect of RF pulses and to formulate the optimization problem.
Jiayao Yang   +3 more
wiley   +1 more source

Myelin water and tensor‐valued diffusion imaging: (How) are they related?

open access: yesMagnetic Resonance in Medicine, EarlyView.
Abstract Purpose Conventional MRI offers limited insight into specific characteristics of central nervous system tissue, whereas quantitative MRI measures can provide more detailed information about different aspects of microstructure. A multi‐metric approach involving multiple quantitative measures may improve our understanding of healthy tissue and ...
Sharada Balaji   +11 more
wiley   +1 more source

Low-Complexity Decoding of Block Turbo-Coded System with Antenna Diversity

open access: yesEURASIP Journal on Advances in Signal Processing, 2003
The goal of this paper is to reduce the decoding complexity of space-time block turbo-coded system with low performance degradation. Two block turbo-coded systems with antenna diversity are considered.
Chen Yanni, Parhi Keshab K
doaj   +1 more source

Quadruple‐refocused spin‐locking: A robust method for high‐amplitude T1ρ imaging

open access: yesMagnetic Resonance in Medicine, EarlyView.
Abstract Purpose Longitudinal relaxation time in the rotating frame (T1ρ) is a source of tissue‐specific contrasts, with applications in detecting myocardial fibrosis, liver fibrosis, and early‐stage osteoarthritis. However, T1ρ measurements are sensitive to static (B0) and radiofrequency (B1) magnetic field inhomogeneities.
Cai Wan   +7 more
wiley   +1 more source

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