The Establishment of Open Articulatory Postures by Deaf and Hearing Talkers

1991 ◽  
Vol 34 (3) ◽  
pp. 453-459 ◽  
Author(s):  
Nancy Tye-Murray
Keyword(s):  
Steady State ◽  
Speech Production ◽  
X Ray ◽  
Movement Trajectories ◽  
Tongue Muscles ◽  
The Common ◽  
Displacement Patterns

Previous researchers have proposed that prelingually deafened talkers do not displace the tongue body to establish vowel steady-state postures and displace the jaw excessively. The purpose of this investigation was to evaluate the opening gesture lingual displacement patterns of three deaf and two hearing adult talkers. Cinefluorography and x-ray microbeam data indicated that the deaf subjects displaced their tongue bodies during the opening gestures. However, their glossal movement trajectories were qualitatively dissimilar to those of the hearing subjects. Whereas the hearing subjects moved the tongue differently for different vowel contexts, the deaf subjects had similar trajectories for all contexts. The common trajectories suggest that some deaf talkers contract their tongue muscles such that the tongue body moves similarly for all vowels. The deaf subjects also appeared to have a less flexible tongue body during speech production than the hearing subjects. Means for quantifying and comparing the lingual behaviors of deaf and hearing talkers are considered.

An Electromyographic Study of the Tongue During Vowel Production

1964 ◽  
Vol 7 (3) ◽  
pp. 209-232 ◽  
Author(s):  
Peter F. Mac Neilage ◽  
George N. Sholes
Keyword(s):  
Speech Perception ◽  
Speech Production ◽  
Vowel Production ◽  
X Ray ◽  
Tongue Muscles ◽  
Different Types ◽  
Surface Electromyograms ◽  
Anatomical Information

Surface electromyograms were recorded from 13 locations on the tongue of one subject during production of 17 different types of [p]-vowel-[p] monosyllables. Results were considered together with X-ray data on tongue action, and anatomical information on tongue musculature, in an attempt to describe the action of tongue muscles during vowel production. It proved possible in most cases to assign muscles, with some certainty, to the major features of myographic activity, and to indicate what function the muscle was serving. The results have particular relevance to theories of sequential speech production, and indirectly, theories of speech perception, as they provide a basis for description of how coarticulation of vowels with consonants involving the tongue takes place.

scholarly journals 3D Ore Characterization as a Paradigm Shift for Process Design and Simulation in Mineral Processing

2021 ◽  
Author(s):  
Pratama Istiadi Guntoro ◽  
Yousef Ghorbani ◽  
Jan Rosenkranz
Keyword(s):  
Process Design ◽  
Paradigm Shift ◽  
Mineral Processing ◽  
Analysis Tool ◽  
Micro Computed Tomography ◽  
X Ray ◽  
Automated Mineralogy ◽  
Process Mineralogy ◽  
The Common ◽  
Ore Characterization

AbstractCurrent advances and developments in automated mineralogy have made it a crucial key technology in the field of process mineralogy, allowing better understanding and connection between mineralogy and the beneficiation process. The latest developments in X‑ray micro-computed tomography (µCT) have shown a great potential to let it become the next-generation automated mineralogy technique. µCT’s main benefit lies in its capability to allow 3D monitoring of the internal structure of the ore sample at resolutions down to a few hundred nanometers, thus excluding the common stereological error in conventional 2D analysis. Driven by the technological and computational progress, µCT is constantly developing as an analysis tool and successively it will become an essential technique in the field of process mineralogy. This study aims to assess the potential application of µCT systems, for 3D ore characterization through relevant case studies. The opportunities and platforms that µCT 3D ore characterization provides for process design and simulation in mineral processing are presented.

scholarly journals On the X-ray Diagnosis of Gallstones in the Common Duct

2015 ◽  
Vol 57 (1) ◽  
pp. e5-e8
Author(s):  
M. Simon ◽  
M. D. Stockholm
Keyword(s):  
Common Duct ◽  
X Ray ◽  
The Common

Relative Reactivity Trends OP High Temperature Superconductor Phases

1992 ◽  
Vol 275 ◽  
Author(s):  
David R. Riley ◽  
Ji-Ping Zhou ◽  
A. Manthiram ◽  
John T. McDevitt
Keyword(s):  
Electron Microscopy ◽  
Carbon Dioxide ◽  
High Temperature ◽  
High Temperature Superconductor ◽  
Relative Reactivity ◽  
Complete Understanding ◽  
High Tc ◽  
X Ray ◽  
The Common ◽  
Scanning Electron

ABSTRACTMany of the high temperature superconductor phases degrade rapidly when in the presence of water, acids, carbon dioxide or carbon monoxide. In order to foster more rapid developments in the area of high-Tc research, it will be necessary to acquire a more complete understanding of the surface chemistry of these superconducting materials. In this paper, the relative reactivity of the common cuprate phases toward water is reported. X-ray powder diffraction and scanning electron microscopy measurements are utilized here to establish the reactivity trends.

Interarticulator Coordination in Dysarthria

2003 ◽  
Vol 46 (5) ◽  
pp. 1247-1261 ◽  
Author(s):  
Gary Weismer ◽  
Yana Yunusova ◽  
John R. Westbury
Keyword(s):  
Parkinson’S Disease ◽  
Amyotrophic Lateral Sclerosis ◽  
Speech Production ◽  
Experimental Work ◽  
Vowel Duration ◽  
Global Synchronization ◽  
X Ray ◽  
Acoustic Target ◽  
Temporal Location ◽  
Lateral Sclerosis

Articulatory discoordination is often said to be an important feature of the speech production disorder in dysarthria, but little experimental work has been done to identify and specify the coordination difficulties. The present study evaluated the coordination of labial and lingual gestures for /u/ production in persons with Parkinson's disease (PD), amyotrophic lateral sclerosis (ALS), and in control participants. Both tongue backing/raising and reduction of the area enclosed by the lips can produce the characteristic low F2 of /u/. The timing of these articulatory gestures with respect to the acoustic target of a low F2 was inferred from X-ray microbeam data. Pellet motions of the tongue dorsum and lips revealed the timing of the lingual and labial gestures to be strongly linked together (synchronized), predictive of the temporal location of the lowest F2 within the vocalic nucleus, and scaled proportionately to the overall vowel duration in control participants. Somewhat surprisingly, essentially the same findings were obtained in the speakers with dysarthria. These relationships were noisier among the speakers with dysarthria, but the global synchronization patterns applied to all 3 groups. Further analyses revealed the synchronization to be less well defined and more variable across speakers with ALS, as compared to speakers with PD and the controls. Results are discussed relative to concepts of coordination in dysarthria.

Luminescence Studies on Low Temperature Synthesized ZnGa2O4:Ln3+ (Ln = Tb and Eu) Nanoparticles

2008 ◽  
Vol 8 (11) ◽  
pp. 5776-5780 ◽  
Author(s):  
C. Manikyala Rao ◽  
V. Sudarsan ◽  
R. S. Ningthoujam ◽  
U. K. Gautam ◽  
R. K. Vatsa ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Oleic Acid ◽  
Steady State ◽  
Low Temperature ◽  
Ethylene Glycol ◽  
Urea Hydrolysis ◽  
Lanthanide Ions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Broad Emission

ZnGa2O4 nanoparticles doped with lanthanide ions (Tb3+ and Eu3+) were prepared at a low temperature of 120 °C based on urea hydrolysis in ethylene glycol medium. X-ray diffraction studies have confirmed that strain associated with nanoparticles changes as Tb3+ gets incorporated in the ZnGa2O4 lattice. Based on steady state emission and excitation studies of ZnGa2O4:Tb nanoparticles, it has been inferred that ZnGa2O4 host is characterized by a broad emission around 427 nm and there exists energy transfer between the host and Tb3+ ions. Unlike this, for ZnGa2O4:Eu nanoparticles, very poor energy transfer between the host and Eu3+ ions is observed. These nanoparticles when coated with ligands like oleic acid results in their improved dispersion in organic solvents like chloroform and dichloromethane.

scholarly journals Slip of the T tube within the common bile duct: A little known complication of the T tube drainage

2005 ◽  
Vol 133 (3-4) ◽  
pp. 138-141
Author(s):  
Radoje Colovic ◽  
Vladimir Radak ◽  
Nikica Grubor ◽  
Slavko Matic
Keyword(s):  
Bile Duct ◽  
Common Bile Duct ◽  
Tube Drainage ◽  
X Ray ◽  
Abdominal Drain ◽  
T Tube ◽  
Tube Position ◽  
Bile Drainage ◽  
The Common ◽  
The Right

Complications related to the T tube drainage of the common bile duct are not uncommon. Some, like dislocations of the T tube out of the common bile duct, could be very serious, particularly if developed during the first few days after surgery, when the abdominal drain in the subhepatic space had been already removed. Then, an emergency reoperation might be necessary. The slip of the T tube upwards or downwards inside the common bile duct is not so rare. Fortunately, it is less dangerous and can usually be resolved without reoperation. It takes place several days after surgery, followed by the right subcostal pain, occasionally with temperature, rise of the bilirubin and with decrease or complete cessation of the bile drainage through the T tube. The diagnosis can be made only on the basis of T tube cholangiography. The re-establishment of the proper T tube position must be done under X-ray visualization. Seven cases of the T tube slip within the common bile duct, its clinical presentation, diagnosis and method of repositioning were presented. Possible mechanism of complication was described. As far as we know, the complications have not been described by other authors.

scholarly journals Antegrade X-ray surgical interventions in patients with choledocholithiasis in case of failed endoscopic procedures

2019 ◽  
Vol 24 (2) ◽  
pp. 48-59
Author(s):  
O. I. Okhotnikov ◽  
M. V. Yakovleva ◽  
S. N. Grigoriev ◽  
V. I. Pakhomov ◽  
N. I. Shevchenko ◽  
...  
Keyword(s):  
Surgical Treatment ◽  
Bile Duct ◽  
Common Bile Duct ◽  
Postoperative Mortality ◽  
Endoscopic Papillotomy ◽  
X Ray ◽  
Endoscopic Procedures ◽  
Rendezvous Technique ◽  
Antegrade Approach ◽  
The Common

Objective. To analyze safety and efficacy of X-ray surgical treatment of choledocholithiasis in case of failed endoscopic procedures. Material and methods. A retrospective analysis included 195 patients with choledocholithiasis who underwent X-ray surgical treatment. Primary X-ray surgical intervention was antegrade cholangiostomy. Data of antegrade cholangiography were used to determine type of endobiliary intervention. Antegrade mechanical and pneumatic choledocholithotripsy and lithoextraction, balloon dislocation of stones of the common bile duct into duodenum or jejunum, lithoextraction using rendezvous technique after endoscopic papillotomy through transpapillary drainage tube or a wire were applied. Results. Puncture and drainage of non-dilated bile ducts were successfully performed in 30 (15.4%) patients. There were 212 procedires of cholangiostomy in 195 patients including redo interventions. Complications after cholangiostomy were absent in 92.9% of cases. Minor complications occurred in 7.1% of cases. Antegrade mechanical and pneumatic choledocholithotripsy and lithoextraction was performed in 118 (98.3%) patients. Balloon dislocation of stones of the common bile duct into duodenum was applied in 52 (81.3%) patients. Lithoextraction using rendezvous technique after previous endoscopic papillosphincterotomy was performed in 12 (60%) patients. Six patients underwent transpapillary external-internal drainage of common bile duct. Five patients had stricture of biliodigestive anastomosis complicated by cholelithiasis. Lithotripsy and lithoextraction through antegrade approach or dislocation of stones into jejunum after previous balloon dilatation were performed in these patients. Postoperative mortality was 1.5%. Minimally invasive techniques were absolutely effective for choledocholithiasis in 187 (98.9%) patients. Conclusion. Antegrade X-ray surgical management is effective and safe in patients with choledocholithiasis and unsuccessful previous endoscopic procedures. Integral efficiency of antegrade management of cholelithiasis was 88.8%.

Crystallization of nanosized titania particles prepared by the sol-gel process

1994 ◽  
Vol 9 (8) ◽  
pp. 2102-2108 ◽  
Author(s):  
E. Haro-Poniatowski ◽  
R. Rodríguez-Talavera ◽  
Heredia M. de la Cruz ◽  
O. Cano-Corona ◽  
R. Arroyo-Murillo
Keyword(s):  
Particle Size ◽  
Steady State ◽  
Light Scattering ◽  
Sol Gel ◽  
X Ray ◽  
Constant Size ◽  
Size Profile ◽  
Nanosized Titania ◽  
Sol Gel Process ◽  
Kinetics Of

Sols of titania were obtained by the sol-gel method and their size profile was followed by dynamical light scattering. In the early stages of the reaction an unstable behavior was detected. After this unstable regime the particle size reaches a steady state where the sols have a constant size while increasing in number. Once the sol concentration reaches its overlap value, the gelation regime takes place. For samples prepared in this way Raman spectra and x-ray diffractometry were used to characterize the kinetics of crystallization of the material.

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