Results 251 to 260 of about 2,248,909 (304)

Weight gain and blood pressure

Journal of Hypertension, 2020
Objective: Although the causality of the obesity--hypertension association is established, the potential for prevention is not. We hypothesized that weight gain between early adulthood and mid-life is associated with higher mid-life blood pressure.
Johan, Sundström, Lars, Lind, Erik, Lampa, Oskar, Angerås, Erasmus, Bachus, Göran, Bergström, Bo, Carlberg, Gunnar, Engström, Jan E, Engvall, Mats, Eriksson, Bruna, Gigante, Emil, Hagström, Ola, Hjelmgren, Jan-Håkan, Jansson, Tomas, Jernberg, Maria, Mannila, Fredrik H, Nyström, Jonas, Oldgren, Margaretha, Persson, Anette, Sandström, Eva, Swahn, Stefan, Söderberg, Kjell, Torén, Carl Johan, Östgren, Annika, Rosengren   +24 more
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Pressure Gain Combustion by Using Shock Flame Interaction Pressure Rise

Volume 5: Controls, Diagnostics, and Instrumentation; Cycle Innovations; Cycle Innovations: Energy Storage, 2020
Abstract Pressure loss across a combustor in a gas turbine reduces thermal efficiency and increases specific fuel consumption. Theoretically, any pressure gain across the combustor results in higher thermal efficiency and lower specific fuel consumption.
Birol Gundogdu, Martin G. Rose
openaire   +1 more source

Negative radiation pressure on gain medium structures

Optics Letters, 2010
We demonstrate negative radiation pressure on gain medium structures, such that light amplification may cause a nanoscale body to be pulled toward a light source. Optically large gain medium structures, such as slabs and spheres, as well as deep subwavelength bodies, may experience this phenomenon.
Amit, Mizrahi, Yeshaiahu, Fainman
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Sound Pressure Gain Produced by the Human Middle Ear

Otolaryngology–Head and Neck Surgery, 1995
The acoustic function of the middle ear is to match sound passing from the low impedance of air to the high impedance of cochlear fluid. Little information is available on the actual middle ear pressure gain in human beings. This article describes experiments on middle ear pressure gain in six fresh human temporal bones.
H, Kurokawa, R L, Goode
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Low pressure gain measurements in KrF

Applied Physics B Photophysics and Laser Chemistry, 1991
Optical gain at 248 nm is measured in low pressure krypton/fluorine mixtures excited by an electron-beam. Measurable gain is observed down to a pressure of 50 mbar. Results are compared with the predictions of a simple kinetic model. The application of low pressure operation to ultra high power short pulse amplifiers is discussed.
G. J. Hirst, M. J. Shaw
openaire   +1 more source

High-gain high-pressure highly efficient COIL

SPIE Proceedings, 2004
The activity of development a COIL with high potential recovered pressure, high gain and efficiency is described. Two nozzle banks with conical supersonic nozzles for the driver nitrogen but with different nozzle arrangements have been developed for generation of the gain flow of chemical oxygen-iodine laser.
Marsel V. Zagidullin, Valery D. Nikolaev, Michael I. Svistun, Nikolai A. Khvatov, Gordon D. Hager   +4 more
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Pressure-Gain Combustion: Part I—Model Development

Journal of Engineering for Gas Turbines and Power, 1996
A model for aerodynamically valved pulse combustion is presented. Particular emphasis is placed on using the model equations to identify characteristic length and time scales relevant to the design of pressure-gain combustors for gas turbine applications.
L. Narayanaswami, G. A. Richards
openaire   +1 more source

Pressure-Gain Combustion Using Shock–Flame Interaction

Journal of Propulsion and Power, 2013
One method of significantly improving the performance of gas turbine engines is to use the thermodynamically more efficient unsteady combustion with pressure rise. In this work, the feasibility of using the interaction of shock waves with a flame to achieve pressure-gain combustion is investigated. A new analytical model is described. The pressure rise
E. Lutoschkin, M. G. Rose, S. Staudacher
openaire   +1 more source

Gain anisotropy in low-pressure chemical lasers

Applied Optics, 1983
The gain coefficient in a low-pressure chemical laser during lasing differs when viewed along the optical resonator axis and when viewed normal to the axis. Expressions for axial and normal gain coefficients are deduced. The ratio of normal-to-axial gain coefficient is evaluated for a saturated multimode chemical laser employing a Fabry-Perot resonator.
openaire   +2 more sources