Results 21 to 30 of about 747,519 (293)

An Empirical Air-to-Ground Channel Model Based on Passive Measurements in LTE [PDF]

, 2019
In this paper, a recently conducted measurement campaign for unmanned-aerial-vehicle (UAV) channels is introduced. The downlink signals of an in-service long-time-evolution (LTE) network which is deployed in a suburban scenario were acquired.
Ai, Bo, Cai, Xuesong, Pedersen, Gert F., Pérez Yuste, Antonio, Rodríguez-Piñeiro, José, Wang, Nanxin, Yin, Xuefeng   +6 more
core   +2 more sources

Treatment of the QCD coupling in high energy processes [PDF]

, 2001
The treatment of the running QCD coupling in evolution equations is discussed. It is shown that the use of the virtuality of ladder (vertical) partons as the scale for QCD coupling in every rung of ladder graphs is an approximation that holds for DIS at ...
Altarelli, Amati, B.I. Ermolaev, Badalek, Bassetto, Ciafaloni, Ciafaloni, Collins, Curci, Dokshitzer, Ermolaev, Ermolaev, Ermolaev, Gribov, Kijo, Kwiecinski, M. Greco, Manaenkov, S.I. Troyan, Salam, Slavnov, Stanley, Taylor, Thorne, Thorne   +24 more
core   +2 more sources

Evaluation and Optimization of a Cross-Rib Micro-Channel Heat Sink

Micromachines, 2022
This article presents a novel cross-rib micro-channel (MC-CR) heat sink to make fluid self-rotate. For a thermal test chip (TTC) with 100 w/cm2, the cross-ribs micro-channel were compared with the rectangular (MC-R) and horizontal rib micro-channel (MC ...
Haiying Chen, Chuan Chen, Yunyan Zhou, Chenglin Yang, Gang Song, Fengze Hou, Binbin Jiao, Ruiwen Liu   +7 more
doaj   +1 more source

A new channel structure for strengthening heat transfer of SCO2 printed circuit heat exchanger (PCHE): variable sectional semicircular channel

Frontiers in Energy Research, 2023
In this paper, a mathematical and physical model is established to study the convective heat transfer performance of supercritical carbon dioxide (SCO2) in three kinds of horizontal semicircular channels (uniform cross-sectional channel, diverging and ...
Mingtong Wei, Bingguo Zhu, Jixiang He, Kaigang Gong   +3 more
doaj   +1 more source

Morphology of rain water channelization in systematically varied model sandy soils [PDF]

, 2014
We visualize the formation of fingered flow in dry model sandy soils under different raining conditions using a quasi-2d experimental set-up, and systematically determine the impact of soil grain diameter and surface wetting property on water ...
Barrois, R., Cejas, C. M., Dreyfus, R., Durian, D. J., Wei, Y.   +4 more
core   +6 more sources

PARTICLE DEPOSITION STUDY IN A HORIZONTAL SQUARE CHANNEL USING HIGH-RESOLUTION IMAGING [PDF]

EPJ Web of Conferences, 2021
The ongoing research at Texas A&M University (TAMU) aims to develop and implement measurement techniques to quantify fission product transport and related phenomena in a Gas-Cooled Fast Reactor (GCFR).
Orea D., Chavez R., Nguyen D.T., Vaghetto R., Anand N. K., Hassan Y. A., Sabharwall P.   +6 more
doaj   +1 more source

Performance of Integrated Ground-Air-Space FSO Links Over Various Turbulent Environments

IEEE Photonics Journal, 2022
We analyze the outage probability of integrated ground-air-space free-space optical (FSO) communication links for different atmospheric turbulence channel models.
Yalcn Ata, Mohamed-Slim Alouini
doaj   +1 more source

Novel hybrid action of GABA mediates inhibitory feedback in the mammalian retina.

PLoS Biology, 2019
The stream of visual information sent from photoreceptors to second-order bipolar cells is intercepted by laterally interacting horizontal cells that generate feedback to optimize and improve the efficiency of signal transmission.
James C R Grove, Arlene A Hirano, Janira de Los Santos, Cyrus F McHugh, Shashvat Purohit, Greg D Field, Nicholas C Brecha, Steven Barnes   +7 more
doaj   +1 more source

SIMULATION OF HEAT TRANSFER AND A NEW NANOFLUID FLOW INSIDE A HORIZONTAL CHANNEL

Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ
The current investigation aims to simulate the heat transfer of conventional fluid and various types of nanofluids inside a horizontal heated tube exposed to a constant heat flux.
Mohammed Saad Kamel, Ahmed K. Albdoor, Saad Jabbar Nghaimesh   +2 more
doaj   +1 more source

Advanced Quantizer Designs for FDD-Based FD-MIMO Systems Using Uniform Planar Arrays

, 2018
Massive multiple-input multiple-output (MIMO) systems, which utilize a large number of antennas at the base station, are expected to enhance network throughput by enabling improved multiuser MIMO techniques.
Choi, Junil, Kim, Taeyoung, Love, David J., Song, Jiho   +3 more
core   +1 more source