Results 81 to 90 of about 2,345,379 (199)

Shock-induced melting of MgSiO_3 perovskite and implications for melts in Earth's lowermost mantle [PDF]

open access: yes, 2004
New shock wave equation of state (EOS) data for enstatite and MgSiO_3 glass constrain the density change upon melting of Mg-silicate perovskite up to 200 GPa. The melt becomes denser than perovskite near the base of Earth's lower mantle.
Ahrens, Thomas J.   +3 more
core  

Kinematics of hovering hummingbird flight along simulated and natural elevational gradients [PDF]

open access: yes, 2003
Hovering flight is one of the most energetically demanding forms of animal locomotion. Despite the cost, hummingbirds regularly hover at high elevations, where flight is doubly challenging because of reduced air density and oxygen availability.
Altshuler, Douglas L., Dudley, Robert
core  

Lunar mass spectrometer test program [PDF]

open access: yes
The procedures are described along with results obtained in a test program conducted to demonstrate the performance of a candidate lunar mass spectrometer.
Dobrott, J. R., Torney, F. L.
core   +1 more source

Effect of Ultra High Pressure Combined with Partial Freezing on the Storage Quality of Chicken Soup

open access: yesShipin gongye ke-ji
Traditional high-temperature sterilization of chicken soup can easily lead to adverse effects on product quality and result in a short storage period, which fails to meet the demands for modern convenience and nutritional consumption.
Zishuang JIN   +5 more
doaj   +1 more source

Computational fluid dynamics analysis of middle ear pressure dynamics: Evidence for efficient pressure equalization during partial eustachian tube opening.

open access: yesPLoS ONE
BackgroundEustachian tube (ET) dysfunction is associated with middle ear pathologies; however, the quantitative relationship between ET opening and pressure equalization remains insufficiently characterized.
Yanzhuo Zhang   +10 more
doaj   +1 more source

Influence of High-voltage Transformer on Electric Locomotive Passing the Neutral Section

open access: yes机车电传动, 2015
Based on the typical manner of electric locomotive passing the neutral section, equivalent circuit model was established of the three kinds of voltage transformer according to electromagnetic induction, the resistance partial pressure and capacitance ...
MA Tan, XU Yan
doaj  

Introduction to total- and partial-pressure measurements in vacuum systems [PDF]

open access: yes
An introduction to the fundamentals of total and partial pressure measurement in the vacuum regime (760 x 10 to the -16th power Torr) is presented.
Kern, F. A., Outlaw, R. A.
core   +1 more source

Improvement of oxygen partial pressure sensor [PDF]

open access: yes
Flight type calcium stabilized solid electrolyte oxygen ...
Agnew, F. R.   +2 more
core   +1 more source

On the anomaly of velocity-pressure decoupling in collocated mesh solutions [PDF]

open access: yes
The use of various pressure correction algorithms originally developed for fully staggered meshes can yield a velocity-pressure decoupled solution for collocated meshes. The mechanism that causes velocity-pressure decoupling is identified.
Kim, Sang-Wook, Vanoverbeke, Thomas
core   +1 more source

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