Results 41 to 50 of about 372,791 (306)

Air Force Pilot Expertise Assessment during Unusual Attitude Recovery Flight

open access: yesSafety, 2022
Pilot training and expertise are key aspects in aviation. A traditional way of evaluating pilot expertise is to measure performance output. However, this approach provides a narrow view of the pilot’s capacity, especially with regard to mental and ...
Gianluca Borghini   +11 more
doaj   +1 more source

Daugavet centers are separably determined [PDF]

open access: yesМатематичні Студії, 2013
A linear bounded operator $G$ acting from a~Banach space $X$ intoa~Banach space $Y$ is a~Daugavet center if every linear boundedrank-$1$ operator $Tcolon X o Y$ fulfills$|G+T|=|G|+|T|$.
T. Ivashyna
doaj  

Data assimilation for volcanic ash plumes using a satellite observational operator: a case study on the 2010 Eyjafjallajökull volcanic eruption [PDF]

open access: yesAtmospheric Chemistry and Physics, 2017
Using data assimilation (DA) to improve model forecast accuracy is a powerful approach that requires available observations. Infrared satellite measurements of volcanic ash mass loadings are often used as input observations for the assimilation scheme ...
G. Fu   +5 more
doaj   +1 more source

A note on operators from Kothe function spaces to $c_0(\Gamma)$

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2013
It is well known that every operator from $E = L_p$, $1 \leq p <\infty$ to $c_0$ is narrow. We show that this result can be extended to a more general class of Kothe function spaces $E$.
I. V. Krasikova, M. M. Popov
doaj   +1 more source

Accounting for Azimuthal Coupling in Long-Range Ocean Acoustics Calculations

open access: yesIEEE Access, 2023
The parabolic equation method is an accurate and efficient approach for solving nonseparable problems in ocean acoustics in which there are horizontal variations in the environmental parameters.
John Y. Yoritomo   +3 more
doaj   +1 more source

SIGNIFICANT WAVE HEIGHT DETERMINED FROM SEQUENCE OF X-BAND RADAR IMAGES USING TEAGER-HUANG TRANSFORM [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
This work introduces a nonlinear and data-dependant method for extracting the significant wave height from a sequence of X-band radar images, which is based on the Teager-Huang Transform (THH).
M. R. Mortazavi, C. J. Huang, L. C. Wu
doaj   +1 more source

Fully Coupled Pauli-Fierz Systems at Zero and Positive Temperature

open access: yes, 2014
The purpose of these notes is to give a fairly narrow but thorough introduction to the spectral analysis of Hamiltonians and standard Liouvilleans describing finite dimensional small systems linearly coupled to a scalar massless field or reservoir.
Møller, Jacob Schach
core   +1 more source

Identifying Equipment Factors Associated with Snowplow Operator Fatigue

open access: yesSafety, 2019
A recent body of research in fatigue management indicates that other factors, including in-cab and external equipment, contribute to operator fatigue. The goal of this project was to identify winter road maintenance equipment (in-cab and external) that ...
Matthew C. Camden   +3 more
doaj   +1 more source

Semilinear integro-differential equations, Ⅱ: one-dimensional and saddle-shaped solutions to the Allen-Cahn equation

open access: yesMathematics in Engineering, 2021
This paper addresses saddle-shaped solutions to the semilinear equation $L_K u = f(u)$ in $\mathbb{R}^{2m}$, where $L_K$ is a linear elliptic integro-differential operator with a radially symmetric kernel $K$, and $f$ is of Allen-Cahn type. Saddle-shaped
Juan-Carlos Felipe-Navarro   +1 more
doaj   +1 more source

Negation, 'presupposition' and the semantics/pragmatics distinction [PDF]

open access: yes, 1998
A cognitive pragmatic approach is taken to some long-standing problem cases of negation, the so-called presupposition denial cases. It is argued that a full account of the processes and levels of representation involved in their interpretation typically ...
Carston, R
core   +1 more source

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