Fiber optic signal collection system for primary flight control applications

1994 ◽  
Author(s):  
Sandy L. Harper
Keyword(s):  
Flight Control ◽  
Fiber Optic ◽  
Collection System ◽  
Control Applications ◽  
Signal Collection

Survival in Vivo Canine Phonation Model Without Stimulation

2018 ◽  
Vol 127 (3) ◽  
pp. 178-184 ◽  
Author(s):  
Kena Liu ◽  
Pingjiang Ge ◽  
Xiaoli Sheng ◽  
Jie Jiang ◽  
Huabiao Qin
Keyword(s):  
Sound Intensity ◽  
Canine Model ◽  
Collection System ◽  
Signal Collection ◽  
Phonation Threshold Pressure ◽  
Aerodynamic Parameters ◽  
Laryngeal Imaging ◽  
The Mean

Objectives: We describe a survival nonstimulated in vivo canine phonation model using distending laryngoscope, cramp frame, and constant humidified glottal airflow to elicit phonation. Methods: Five beagle dogs were involved in this study. One cuffed endotracheal tube was placed below the glottis through the tracheotomy and delivered humidified airflow to the glottis. Arytenoids approximation was maintained using a clamp under the distending laryngoscope. Acoustic and aerodynamic parameters were measured using synchronous signal collection system and analysis software. Vocal oscillation also was examined using stroboscope laryngeal imaging. Results: For the nonstimulated in vivo phonation animal, the sound intensity and fundamental frequency were 78.3 ± 6.8 dB and 127.6 ± 29.2 Hz in the first experiment and 82.9 ± 6.6 dB and 175.2 ± 4.4 Hz 4 weeks later. The aerodynamic analysis revealed the mean subglottal phonation threshold pressure (PTP) and phonation threshold flow (PTF) were 8.5 ± 4.0 cmH20 and 683.0 ± 356.4 mL/s in the first experiment and 16.1 ± 8.6 cmH20 and 384.8.0 ± 230.6 mL/s in the second experiment 4 weeks later. Stroboscope image revealed sustained vocal vibration during great airflow delivery to glottis in the phonation animal model. Conclusions: We developed a survival nonstimulated in vivo phonation canine model that allows the study of long-term animal phonation study as its own control.

Data-Driven Retrospective Cost Adaptive Control for Flight Control Applications

2021 ◽  
pp. 1-27
Author(s):  
Syed Aseem Ul Islam ◽  
Tam W. Nguyen ◽  
Ilya V. Kolmanovsky ◽  
Dennis S. Bernstein
Keyword(s):  
Adaptive Control ◽  
Flight Control ◽  
Data Driven ◽  
Control Applications

Sapphire Fiber Evanescent Wave Absorption in Turbid Media

2009 ◽  
Vol 63 (8) ◽  
pp. 932-935 ◽  
Author(s):  
Jian Zhang ◽  
Feibing Xiong ◽  
Nicholas Djeu
Keyword(s):  
Glassy Carbon ◽  
Chemical Sensors ◽  
Evanescent Wave ◽  
Fiber Optic ◽  
Wave Interaction ◽  
Carbon Powder ◽  
Control Applications ◽  
Wave Absorption ◽  
Water Band ◽  
Sapphire Fiber

The influence of particulates on sapphire fiber evanescent wave absorption by water has been studied. Suspensions containing microsized graphite flakes and glassy carbon powder were used. Conventional free-space transmittance measurements of these samples showed strong absorption and scattering, which severely screened the absorption by water. However, the absorption on the water band determined from the evanescent wave interaction was unaffected by the presence of the graphite flakes. These results indicate that fiber-optic evanescent wave chemical sensors may be suitable for process control applications involving turbid reactor streams.

Fiber optic light collection system for scanning-tunneling-microscope-induced light emission

2007 ◽  
Vol 78 (5) ◽  
pp. 053707 ◽  
Author(s):  
Neil J. Watkins ◽  
James P. Long ◽  
Zakya H. Kafafi ◽  
Antti J. Mäkinen
Keyword(s):  
Scanning Tunneling Microscope ◽  
Fiber Optic ◽  
Light Emission ◽  
Scanning Tunneling ◽  
Light Collection ◽  
Collection System ◽  
Tunneling Microscope
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