Results 11 to 20 of about 9,016,860 (310)

Active RIS vs. Passive RIS: Which Will Prevail in 6G? [PDF]

open access: yesIEEE Transactions on Communications, 2021
As a revolutionary paradigm for controlling wireless channels, reconfigurable intelligent surfaces (RISs) have emerged as a candidate technology for future 6G networks.
Zijian Zhang   +6 more
semanticscholar   +1 more source

Interactive Effect of Caffeine and Attention Focus on Postural Stability of Individuals with Different Levels of Physical Activity [PDF]

open access: yesرشد و یادگیری حرکتی ورزشی, 2019
The aim of this study was to determine the interactive effect of caffeine and attention focus on the postural stability in subjects with different levels of physical activity.
Saeed Arsham   +2 more
doaj   +1 more source

Advancement of Phenoxypyridine as an Active Scaffold for Pesticides

open access: yesMolecules, 2022
Phenoxypyridine, the bioisostere of diaryl ethers, has been widely introduced into bioactive molecules as an active scaffold, which has different properties from diaryl ethers.
Yanfei Liu   +4 more
doaj   +1 more source

Forest, Crop and Grassland Leaf Area Index Estimation Using Remote Sensing: A Review of Current Research Methods, Sensors, Estimation Models and Accomplishments

open access: yesApplied Sciences, 2023
Leaf area index (LAI) is an important parameter in plant ecophysiology; it can be used to quantify foliage directly and as a measure of the photosynthetic active area and, thus, the area subject to transpiration in vegetation.
Nokukhanya Mthembu   +2 more
doaj   +1 more source

A Survey of Deep Active Learning [PDF]

open access: yesACM Computing Surveys, 2020
Active learning (AL) attempts to maximize a model’s performance gain while annotating the fewest samples possible. Deep learning (DL) is greedy for data and requires a large amount of data supply to optimize a massive number of parameters if the model is
Pengzhen Ren   +6 more
semanticscholar   +1 more source

Design and Control of an Active Wrist Orthosis for Rehabilitation [PDF]

open access: yesJournal of Rehabilitation Sciences and Research, 2021
Background: In this study, an active orthosis has been designed to rehabilitate patients with weak wrist flexor and extensor muscles. Methods: First, the mechanical design of the actuating mechanism with a linear servo motor to provide the desired wrist ...
zahra vahabi   +4 more
doaj   +1 more source

Emission Knots and Polarization Swings of Swinging Jets

open access: yesGalaxies, 2016
Knots (emission features in jets of active galactic nuclei) often show non-ballistic dynamics and variable emission/polarization properties. We model these features as emission pattern propagating in a jet that carries a helical magnetic field and is ...
Maxim Lyutikov, Evgeniya Kravchenko
doaj   +1 more source

Problems of development of the party education system in the Far East of the USSR in the 1930s

open access: yesВестник Тамбовского университета. Серия: Гуманитарные науки, 2021
The work is devoted to the study of forms, methods, approaches, peculiarities of functioning and problems of development of the system of party and political education in the Far East of the USSR in the 1930s. Based on the analysis of archival documents,
A. A. Isaev
doaj   +1 more source

Transcriptional activators and activation mechanisms [PDF]

open access: yesProtein & Cell, 2007
Transcriptional activators are required to turn on the expression of genes in a eukaryotic cell. Activators bound to the enhancer can facilitate either the recruitment of RNA polymerase II to the promoter or its elongation. This article examines a few selected issues in understanding activator functions and activation mechanisms.
openaire   +2 more sources

Identity of soul and active intellect has caused [PDF]

open access: yesحکمت صدرایی, 2022
: Identity of soul and active intellect has caused many philosophical problems in transcendental philosophy: Multiplicity In Intellect ، Dependency of active intellect to an Old fashion of science، Lack of enough explanation of unification s moment ...
shamsollah seraj   +2 more
doaj   +1 more source

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