3,520 research outputs found
Fast upper airway magnetic resonance imaging for assessment of speech production and sleep apnea
The human upper airway is involved in various functions, including speech, swallowing, and respiration. Magnetic resonance imaging (MRI) can visualize the motion of the upper airway and has been used in scientific studies to understand the dynamics of vocal tract shaping during speech and for assessment of upper airway abnormalities related to obstructive sleep apnea and swallowing disorders. Acceleration technologies in MRI are crucial in improving spatiotemporal resolution or spatial coverage. Recent trends in technical aspects of upper airway MRI are to develop state-of-the-art image acquisition methods for improved dynamic imaging of the upper airway and develop automatic image analysis methods for efficient and accurate quantification of upper airway parameters of interest. This review covers the fast upper airway magnetic resonance (MR) acquisition and reconstruction, MR experimental issues, image analysis techniques, and applications, mainly with respect to studies of speech production and sleep apnea
Using Hierarchically Structured Lexicon as Key Clues Solving Data Sparseness Problems in Word Sense Disambiguation: a Case for Korean and its Applications to English and Chinese
He abundance of Dense Circumstellar Clumps in the Cassiopeia A Supernova Remnant
We report on the result of He abundance analysis of dense circumstellar
clumps in the young supernova remnant Cassiopeia A. These clumps, which are
called quasi-stationary flocculi (QSFs), are known from previous optical
studies to be enriched in He along with N, but the degree of He overabundance
relative to H has remained uncertain. For several QSFs with near-infrared
spectroscopic data, we have analyzed their He I 1.083 m/Pa ratios
together with the ratios of [Fe II] lines by using the Raymond shock code.
According to our analysis, He is overabundant relative to H by a factor of
in most of these QSFs. This He abundance of QSFs is consistent
with the previous conclusion from the N overabundance that QSFs were ejected
when a substantial amount of the H envelope of the progenitor star had been
stripped off. We discuss the mass-loss history of the progenitor star and the
origin of QSFs.Comment: 20 pages, 8 figure
AI Machine Vision based Oven White Paper Color Classification and Label Position Real-time Monitoring System to Check Direction
We develop a vision system for batch inspection by oven white paper model color by manufacturing a machine vision system for the oven manufacturing automation process. In the vision system, white paper object detection (spring), color clustering, and histogram extraction are performed. In addition, for the automated process of home appliances, we intend to develop an automatic mold combination detection algorithm that inspects the label position and direction (angle/coordinate) using deep learning
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