Results 71 to 80 of about 13,475 (217)

Anomalous waves propagating at very high frequency in the atmosphere and their disturbances due to changes in refractivity profiles

Results in Physics, 2018
Anomalous waves propagation is severely affected due to almost always present variations in refractivity under various environmental conditions at different time, location and frequency.
Imtiaz Alam, Asad Waqar, Muhammad Aamir, Shahzad Hassan, Syed Asim Ali Shah   +4 more
doaj   +1 more source

IPILT–OHPL: An Over-the-Horizon Propagation Loss Prediction Model Established by Incorporating Prior Information Into the LSTM–Transformer Structure

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The evaporation duct is a prevalent atmospheric structure in the marine lower troposphere with significant regional nonuniformity. This structure can trap radio waves inside its layer and enable them to propagate over the horizon with less loss ...
Hanjie Ji, Lixin Guo, Jinpeng Zhang, Yiwen Wei, Xiangming Guo, Yusheng Zhang, Tianhang Nie, Jie Feng   +7 more
doaj   +1 more source

Fuel injector: Air swirl characterization aerothermal modeling, phase 2, volume 1 [PDF]

A well integrated experimental/analytical investigation was conducted to provide benchmark quality relevant to a prefilming type airblast fuel nozzle and its interaction with the combustor dome air swirler.
Mcdonell, V. G., Mongia, H. C., Nikjooy, M., Samuelsen, G. S.   +3 more
core   +1 more source

Wireless Channel Models for Over-the-Sea Communication: A Comparative Study

Applied Sciences, 2019
Over the past few years, the modeling of wireless channels for radio wave propagation over the sea surface has drawn the attention of many researchers.
Arafat Habib, Sangman Moh
doaj   +1 more source

Cropping in Arid-Area Greenhouse [PDF]

In hot, arid regions, yields are usually low and unstable. Greenhouse technology can stabilize and improve yields. But its adoption is impeded by the requirement of large amounts of water for cooling. Evaporative cooling is the most common method.
Girja Sharan
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Human environmental heat transfer simulation with CFD – the advances and challenges [PDF]

, 2009
The modelling and prediction of human thermoregulatory responses and comfort have gone a long way during the past decades. Sophisticated and detailed human models, i.e.
Ji, Y, Novieto, D, Zhang, Y
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Meeting Review: Airborne Aerosol Inlet Workshop [PDF]

Proceedings from the Airborne Aerosol Inlet Workshop are presented. The two central topics of discussion were the role of aerosols in atmospheric processes and the difficulties in characterizing aerosols.
Baumgardner, Darrel, Huebert, Barry, Wilson, Chuck   +2 more
core   +1 more source

D-region differential-phase measurements and ionization variability studies [PDF]

Measurements of electron densities in the D region are made by the partial-reflection differential-absorption and differential-phase techniques. The differential-phase data are obtained by a hard-wired phase-measuring system.
Bowhill, S. A., Weiland, R. M.
core   +1 more source

Development of laminar flow control wing surface porous structure [PDF]

It was concluded that the chordwise air collection method, which actually combines chordwise and spanwise air collection, is the best of the designs conceived up to this time for full chord laminar flow control (LFC).
Anderson, C., Boronow, W., Brown, W., Christensen, J., Gallimore, F., Klotzsche, M., Matsuo, T., Pearce, W., Primavera, G., Thelander, J.   +9 more
core   +1 more source

Condensation in microchannels – Surface tension dominated regime [PDF]

, 2009
This paper was presented at the 2nd Micro and Nano Flows Conference (MNF2009), which was held at Brunel University, West London, UK. The conference was organised by Brunel University and supported by the Institution of Mechanical Engineers, IPEM, the ...
2nd Micro and Nano Flows Conference (MNF2009), Rose, JW, Wang, HS   +2 more
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