Results 101 to 110 of about 18,287 (310)
To determine the horizontal directivity of a train pass-by [PDF]
, 2003 Based on the assumption that railway noise can be modeled as a group/line of incoherent point sources a calculation scheme has been proposed for determining the horizontal directivity of train pass-by noise: with a certain directivity function(s ...
Zhang, Xuetao,
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Interference Suppression in 3-D Monopulse Radar Using External Antenna Elements
IEEE AccessThis article presents a method for suppressing incoherent narrowband interference in a 3D surveillance radar with a multi-beam monopulse antenna by adapting the antenna pattern using external suppression antenna elements.
Pavel Bezousek, Simeon Karamazov
doaj +1 more source
Direct or Not Direct, That is the Criterion
, 2022 The criteria often put forward for the classification of manned missions to Mars architectures are the planetary configuration known as conjunction or opposition at the time of departure, the duration of the stay on the surface or the type of propulsion for the interplanetary maneuvers, which can be chemical, nuclear thermal, nuclear electric, solar ...
openaire +2 more sources
FEBS Open Bio, EarlyView.Repair of neuronal DNA damage in Alzheimer's disease by KCL‐286. (A) Amyloid‐β oligomers and plaques impair neuronal DNA repair pathways, leading to DNA double‐strand breaks and glial activation. (B) KCL‐286 activates RARβ/RXR signalling via retinoic acid response elements (RAREs), associated with increased BRCA1 expression, enhanced DNA repair and ...
Natasha Hill +6 more
wiley +1 more source
Analysis, 1991 The question 'What is the criterion of identity for directions?' might be construed as asking either 'When do lines have the same direction?' or 'When are directions identical?'. Frege's answer 'When they are parallel' fits the former question, not the latter, for it specifies a relation other than identity between lines, not directions.
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New Directions for Adult and Continuing Education, EarlyView.ABSTRACT This article examines the evolving role of organizational leadership amidst the rapid advancements in artificial intelligence (AI). It explores a broadly experienced and documented crisis in leadership, due in part to the disruptive nature of AI and emerging technology.
Rachel Wlodarsky, Davin Carr Chellman
wiley +1 more source
Bounds on Super-Directivity and Super-Gain [PDF]
The thesis focuses on the definition of bounds for maximum directivity and gain of antennas. The main goal is to establish an analytical formula for maximum super-directivity considering specific parameters like bandwidth and antenna size.
Passalacqua, Laura
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Accounting for rupture directivity in ShakeMap [PDF]
, 2010 The rapid and accurate information about the ground shaking following an earthquake is necessary for emergency response planning. A prompt strategy is contouring the real data recorded at the stations. However only few regions, i.e.
Michelini, Alberto +5 more
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Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background and Objectives Multiple sclerosis (MS) exhibits racially disparate rates of disease progression. Black people with MS (B‐PwMS) experience a more severe disease course than non‐Hispanic White people with MS (NHW‐PwMS). Here we investigated structural and functional connectivity as well as structure–function decoupling in the ...
Emilio Cipriano +11 more
wiley +1 more source
Log-periodic optical antennas with broadband directivity [PDF]
, 2012 Optical antennas offer unique possibilities for light manipulation on a sub-wavelength scale. Here, we study log-periodic antennas that exhibit broadband directivity as a result of the self-similar relation between the lengths, separations and widths of ...
Curto, Alberto +2 more
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