Results 91 to 100 of about 1,038,620 (334)

On the Harmonics of a Ring [PDF]

open access: yesProceedings of the London Mathematical Society, 1892
n ...
openaire   +3 more sources

Association Between Metabolic Syndrome and Radiographic Changes in Psoriatic Arthritis: A Cohort Study

open access: yesArthritis Care &Research, EarlyView.
Objective Metabolic syndrome (MetS) is a known comorbidity of psoriatic arthritis (PsA) and is associated with PsA disease activity. We aimed to explore the association between MetS and radiographic features (peripheral and axial) in PsA. Methods We included patients with PsA followed at our prospective observational cohort for the period between 1978 ...
Fadi Kharouf   +6 more
wiley   +1 more source

Phononic High Harmonic Generation [PDF]

open access: yesarXiv, 2016
This paper reports experimental evidence for phononic low-order to high-order harmonic conversion leading to high harmonic generation. Phononic high harmonic generation is mediated by a threshold dependent instability of a driven phonon mode. Once the threshold for instability is met, a cascade of harmonic generation processes is triggered.
arxiv  

Exact solution of the time-dependent harmonic plus an inverse harmonic potential with a time-dependent electromagnetic field [PDF]

open access: yes, 2003
In this article, the problem of the charged harmonic plus an inverse harmonic oscillator with time-dependent mass and frequency in a time-dependent electromagnetic field is investigated. It is reduced to the problem of the inverse harmonic oscillator with time-independent parameters and the exact wave function is obtained.
arxiv   +1 more source

On harmonic superspace [PDF]

open access: yes, 2008
8 pages. Contribution to the seminar "Supersymmetries and Quantum Symmetries" in honour of Prof. V.I.
openaire   +3 more sources

Rigid properties of generalized $τ$-quasi Ricci-harmonic metrics [PDF]

open access: yesarXiv, 2019
In this paper, we study compact generalized $\tau$-quasi Ricci-harmonic metrics. In the first part, we explore conditions under which generalized $\tau$-quasi Ricci-harmonic metrics are harmonic-Einstein and give some characterization results for it.
arxiv  

An Harmonic Analyzer [PDF]

open access: yesPhysical Review (Series I), 1898
n ...
openaire   +2 more sources

Concepts for a Semantically Accessible Materials Data Space: Overview over Specific Implementations in Materials Science

open access: yesAdvanced Engineering Materials, EarlyView.
This manuscript presents advances in digital transformation within materials science and engineering, emphasizing the role of the MaterialDigital Initiative. By testing and applying concepts such as ontologies, knowledge graphs, and integrated workflows, it promotes semantic interoperability and data‐driven innovation. The article reviews collaborative
Bernd Bayerlein   +44 more
wiley   +1 more source

Harmonic analysis

open access: yes2004 IEEE Electro/Information Technology Conference, 2004
This paper describes a method of calculating the transforms, currently obtained via Fourier and reverse Fourier transforms. The method allows calculating efficiently the transforms of a signal having an arbitrary dimension of the digital representation by reducing the transform to a vector-to-circulant matrix multiplying.
openaire   +2 more sources

The Harmonic System

open access: yes, 2022
Abstract The relationships between prime numbers, harmonics, the pattern in prime numbers, the harmonic system, the natural number system, and the Riemann hypothesis.
openaire   +1 more source

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