scholarly journals A controlled evaluation of oral screen effects on intra-oral pressure curve characteristics

2010 ◽  
Vol 32 (5) ◽  
pp. 535-541 ◽  
Author(s):  
M. Knosel ◽  
K. Jung ◽  
G. Kinzinger ◽  
O. Bauss ◽  
W. Engelke
Keyword(s):  
Pressure Curve ◽  
Oral Pressure ◽  
Controlled Evaluation ◽  
Oral Screen

Special Considerations for Evaluation and Treatment of Spanish-Speaking Patients with Cleft Palate

2016 ◽  
Vol 1 (5) ◽  
pp. 41-49
Author(s):  
Ellen Moore
Keyword(s):  
Cleft Palate ◽  
The United States ◽  
Culturally Competent ◽  
Speech Language Pathology ◽  
Spanish Speaking ◽  
Appropriate Treatment ◽  
Oral Pressure ◽  
Language Pathology ◽  
History Of ◽  
Spanish Speaking Population

As the Spanish-speaking population in the United States continues to grow, there is increasing need for culturally competent and linguistically appropriate treatment across the field of speech-language pathology. This paper reviews information relevant to the evaluation and treatment of Spanish-speaking and Spanish-English bilingual children with a history of cleft palate. The phonetics and phonology of Spanish are reviewed and contrasted with English, with a focus on oral pressure consonants. Cultural factors and bilingualism are discussed briefly. Finally, practical strategies for evaluation and treatment are presented. Information is presented for monolingual and bilingual speech-language pathologists, both in the community and on cleft palate teams.

scholarly journals Coupled Effects of Stress, Moisture Content and Gas Pressure on the Permeability Evolution of Coal Samples: A Case Study of the Coking Coal Resourced from Tunlan Coalmine

Water ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1653
Author(s):  
Guofu Li ◽  
Yi Wang ◽  
Junhui Wang ◽  
Hongwei Zhang ◽  
Wenbin Shen ◽  
...  
Keyword(s):  
Moisture Content ◽  
Coalbed Methane ◽  
Gas Permeability ◽  
Axial Stress ◽  
Gas Pressure ◽  
Pressure Curve ◽  
Permeability Evolution ◽  
Confining Stress ◽  
Qinshui Basin ◽  
Gas Seepage

Deep coalbed methane (CBM) is widely distributed in China and is mainly commercially exploited in the Qinshui basin. The in situ stress and moisture content are key factors affecting the permeability of CH4-containing coal samples. Therefore, considering the coupled effects of compressing and infiltrating on the gas permeability of coal could be more accurate to reveal the CH4 gas seepage characteristics in CBM reservoirs. In this study, coal samples sourced from Tunlan coalmine were employed to conduct the triaxial loading and gas seepage tests. Several findings were concluded: (1) In this triaxial test, the effect of confining stress on the permeability of gas-containing coal samples is greater than that of axial stress. (2) The permeability versus gas pressure curve of coal presents a ‘V’ shape evolution trend, in which the minimum gas permeability was obtained at a gas pressure of 1.1MPa. (3) The gas permeability of coal samples decreased exponentially with increasing moisture content. Specifically, as the moisture content increasing from 0.18% to 3.15%, the gas permeability decreased by about 70%. These results are expected to provide a foundation for the efficient exploitation of CBM in Qinshui basin.

A Placebo-Controlled Evaluation of Single, Escalating Doses of CL 284,846, a Non-Benzodiazepine Hypnotic

1994 ◽  
Vol 34 (4) ◽  
pp. 335-344 ◽  
Author(s):  
Bernard Beer ◽  
John R. Ieni ◽  
Wen-Hui Wu ◽  
Donald Clody ◽  
Peter Amorusi ◽  
...  
Keyword(s):  
Controlled Evaluation ◽  
Cl 284,846

scholarly journals Air Pressure Responses to Sudden Vocal Tract Pressure Bleeds During Production of Stop Consonants

2004 ◽  
Vol 47 (4) ◽  
pp. 784-801 ◽  
Author(s):  
David J. Zajac ◽  
Mark C. Weissler
Keyword(s):  
Vocal Tract ◽  
Linear Trend ◽  
Upper Airway ◽  
Air Pressure ◽  
Stop Consonants ◽  
Oral Pressure ◽  
The Face ◽  
Computer Controlled ◽  
Linear Manner ◽  
Respiratory Reflexes

Two studies were conducted to evaluate short-latency vocal tract air pressure responses to sudden pressure bleeds during production of voiceless bilabial stop consonants. It was hypothesized that the occurrence of respiratory reflexes would be indicated by distinct patterns of responses as a function of bleed magnitude. In Study 1, 19 adults produced syllable trains of /pʌ/ using a mouthpiece coupled to a computer-controlled perturbator. The device randomly created bleed apertures that ranged from 0 to 40 mm 2 during production of the 2nd or 4th syllable of an utterance. Although peak oral air pressure dropped in a linear manner across bleed apertures, it averaged 2 to 3 cm H 2 O at the largest bleed. While slope of oral pressure also decreased in a linear trend, duration of the oral pressure pulse remained relatively constant. The patterns suggest that respiratory reflexes, if present, have little effect on oral air pressure levels. In Study 2, both oral and subglottal air pressure responses were monitored in 2 adults while bleed apertures of 20 and 40 mm 2 were randomly created. For 1 participant, peak oral air pressure dropped across bleed apertures, as in Study 1. Subglottal air pressure and slope, however, remained relatively stable. These patterns provide some support for the occurrence of respiratory reflexes to regulate subglottal air pressure. Overall, the studies indicate that the inherent physiologic processes of the respiratory system, which may involve reflexes, and passive aeromechanical resistance of the upper airway are capable of developing oral air pressure in the face of substantial pressure bleeds. Implications for understanding speech production and the characteristics of individuals with velopharyngeal dysfunction are discussed. KEY WORDS: stop consonants, oral air pressure, subglottal air pressure, respiratory reflexes, velopharyngeal dysfunction

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