Results 21 to 30 of about 3,849,527 (290)

Transformation operators for impedance Sturm–Liouville operators on the line

open access: yesМатематичні Студії, 2023
In the Hilbert space $H:=L_2(\mathbb{R})$, we consider the impedance Sturm--Liouville operator $T:H\to H$ generated by the differential expression $ -p\frac{d}{dx}{\frac1{p^2}}\frac{d}{dx}p$, where the function  $p:\mathbb{R}\to\mathbb{R}_+$ is of ...
M. Kazanivskiy   +2 more
doaj   +1 more source

Structural and biochemical analyses of the flagellar expression regulator DegU from Listeria monocytogenes

open access: yesScientific Reports, 2022
Listeria monocytogenes is a pathogenic bacterium that produces flagella, the locomotory organelles, in a temperature-dependent manner. At 37 °C inside humans, L.
Han Byeol Oh, Su-jin Lee, Sung-il Yoon
doaj   +1 more source

Optimizing package express operations in China

open access: yesEuropean Journal of Operational Research, 2022
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Baris Yildiz 0001   +1 more
openaire   +2 more sources

Electron Broadening Operator Including Penetrating Collisions for Hydrogen

open access: yesAtoms, 2020
The expression of the electron broadening operator including the effect of penetrating collisions, i.e., for which the incoming electron enters the extent of bound-electron wave-functions, is rather complicated, even for hydrogen.
Jean-Christophe Pain, Franck Gilleron
doaj   +1 more source

Coordinate-Free Approach for the Model Operator Associated With a Third-Order Dissipative Operator

open access: yesFrontiers in Physics, 2019
In this paper we investigate the spectral properties of a third-order differential operator generated by a formally-symmetric differential expression and maximal dissipative boundary conditions.
Ekin Uğurlu   +2 more
doaj   +1 more source

Krein-von Neumann extension of an even order differential operator on a finite interval [PDF]

open access: yesOpuscula Mathematica, 2018
We describe the Krein-von Neumann extension of minimal operator associated with the expression \(\mathcal{A}:=(-1)^n\frac{d^{2n}}{dx^{2n}}\) on a finite interval \((a,b)\) in terms of boundary conditions. All non-negative extensions of the operator \(A\)
Yaroslav I. Granovskyi   +1 more
doaj   +1 more source

The Veneziano amplitude via mostly BRST exact operator

open access: yesNuclear Physics B, 2022
The Veneziano amplitude is derived from fixing one degree of freedom of PSL(2,R) symmetry by the insertion of a mostly BRST exact operator. Evaluating the five-point function which consists of four open string tachyons and this gauge fixing operator, we ...
Isao Kishimoto   +3 more
doaj   +1 more source

Facial expression recognition using singular values and wavelet‐based LGC‐HD operator

open access: yesIET Biometrics, 2021
Facial expression recognition (FER) is a significant research area in the human–computer interaction. The performance of FER systems depends on an efficient feature extraction method.
Durga G. Rao Kola   +1 more
doaj   +1 more source

Preliminary report: black system event in South Australia on 28 September 2016 [PDF]

open access: yes, 2016
This preliminary report explains how severe weather moved through South Australia on the afternoon of Wednesday 28 September 2016, with high winds, thunderstorms, lightning strikes, hail, and heavy rainfall.
Australian Energy Market Operator
core   +1 more source

On integral representation of thetranslation operator

open access: yesMathematical Modelling and Analysis, 2012
The formulation in the explicit form of quantum expression of the one-dimensional translation operator as well as Hermitian operator of momentum and its eigenfunctions are presented.
Paulius Miškinis
doaj   +1 more source

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