Results 31 to 40 of about 245,653 (257)

Airway Pressures during Positive-pressure Ventilation with Superimposed Oscillations

Upsala Journal of Medical Sciences, 1990
This study was undertaken to determine whether oscillations superimposed on a regular ventilatory pattern influence the arterial blood gases and pH and the airway pressures at adequate alveolar ventilation at the onset of inhibition of inspiratory activity. The peak, mean and end-expiratory airway pressures were therefore measured at inhibition of this
A, Jonzon, J A, Tantalean, T, Norsted, G, Sedin   +3 more
openaire   +2 more sources

An Optomechanical Oscillator on a Silicon Chip [PDF]

, 2010
The recent observation on radiation-pressure-driven self-sustained oscillation in high-Q optical microresonators has created new possibilities for development of photonic devices that benefit from unique functionalities offered by these “optomechanical ...
Hossein-Zadeh, Mani, Vahala, Kerry J.
core   +1 more source

The Effects of the Downstream Contraction Ratio of Organ-Pipe Nozzle on the Pressure Oscillations of Self-Resonating Waterjets

Energies, 2018
Self-resonating waterjets (SRWJs) are being widely used in the fields of energy exploitation, due to the significantly increased penetration rate of roller bits in deep-hole drilling.
Xiaoliang Wang, Yong Kang, Mengda Zhang, Miao Yuan, Deng Li   +4 more
doaj   +1 more source

Interaction of reed and acoustic resonator in clarinetlike systems [PDF]

, 2008
Sound emergence in clarinetlike instruments is investigated in terms of instability of the static regime. Various models of reed-bore coupling are considered, from the pioneering work of Wilson and Beavers ["Operating modes of the clarinet", J.
Avanzini F., Blevins R. D., Bouasse H., Chick J., Christophe Vergez, Cullen J. S., Fabrice Silva, Gazengel B., Grand N., Hirschberg A., Jean Kergomard, Joël Gilbert, Kergomard J., Lopez I., Nederveen C. J., Saneyoshi J., Schumacher R. T., Silva F.   +17 more
core   +3 more sources

Study on Pressure Oscillation Characteristic of Steam Low-velocity Jet under Seawater Condition

Yuanzineng kexue jishu
In order to address the research gap in steam-seawater interactions and evaluate the feasibility of using seawater as a coolant in marine nuclear power systems, the pressure oscillation characteristics of steam low-velocity jet in seawater have been ...
Study on Pressure Oscillation Characteristic of Steam Low-velocity Jet under Seawater Condition
doaj   +1 more source

Effects of Flame Propagation Velocity and Turbulence Intensity on End-Gas Auto-Ignition in a Spark Ignition Gasoline Engine

Energies, 2020
Knocking is a destructive and abnormal combustion phenomenon that hinders modern spark ignition (SI) engine technologies. However, the in-depth mechanism of a single-factor influence on knocking has not been well studied.
Lei Zhou, Xiaojun Zhang, Lijia Zhong, Jie Yu   +3 more
doaj   +1 more source

Flow condensation pressure oscillations at different orientations [PDF]

International Journal of Heat and Mass Transfer, 2018
Investigation of two-phase flow dynamic behavior and instabilities has traditionally centered on phenomena present in boiling flows due to the safety critical nature of boiling in a variety of cooling applications. Analysis of pressure signals in condensing systems reveal the presence of relevant oscillatory phenomena during flow condensation as well ...
Lucas E. O'Neill, Issam Mudawar, Mohammad M. Hasan, Henry K. Nahra, R. Balasubramaniam, Jeffery R. Mackey   +5 more
openaire   +2 more sources

Numerical Investigation of Flow Oscillation in the Diffuser and Test Chamber of a High Altitude Test Simulator [PDF]

علوم، فناوری و کاربردهای فضایی
Keywords  Article Info The present research has been conducted to numerical simulation and phenomenology of the pressure fluctuations and instability of the diffuser with the area ratio of the diffuser inlet to the nozzle outlet of 1.91.
Nematollah Fouladi, Fatemeh Zahedifar, Mohammad Farahani   +2 more
doaj   +1 more source

Numerical analysis of transient combustion response to acoustic oscillations in axisymmetric rocket motors [PDF]

, 1998
A numerical analysis of unsteady motions in solid rocket motors with a nozzle has been conducted. The formulation treats the complete conservation equations for the gas phase and the one-dimensional equations in the radial direction for the condensed
Culick, F. E. C., Roh, T. S.
core   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source