Results 81 to 90 of about 346,351 (271)

Sums of generalized convergent harmonic series with eight periodically repeated numerators

open access: yesRatio Mathematica, 2015
This contribution deals with the generalized convergent harmonic series with eight periodically repeated numerators and it is a follow-up to author’s papers dealing with the generalized alternating harmonic series with two up to seven periodically ...
Radovan Potucek
doaj   +1 more source

A Harmonic Contribution Evaluation Method Based on Dynamic Parameter Model of Harmonic Source

open access: yes, 2022
The Norton model (NM) has been widely applied in the determination method of harmonic contribution, which cannot always precisely represent the harmonic source especially when the background voltage fluctuates, the accuracy is not satisfactory. To solve this problem, a new harmonic contribution determination method using the dynamic parameter model ...
Liu, Youwei, Xiao, Yan, Xu, Jing
openaire   +1 more source

Understanding bio‐based polymers: A study of origins, properties, biodegradation and their impact on health and the environment

open access: yesFEBS Open Bio, EarlyView.
This review provides an overview of bio‐based polymer sources, their unique functional properties and their environmental impact, and addresses their role as sustainable alternatives. It discusses end‐of‐life options, including composting and anaerobic digestion for renewable energy.
Sabina Kolbl Repinc   +8 more
wiley   +1 more source

Method for determining the harmonic contribution of consumer installations based on the application of passive filters

open access: yesIET Generation, Transmission & Distribution
The paper presents a new method for estimating the contribution of distortion sources based on the application of passive harmonic filters. The method does not require the measurement of harmonic network impedance and is based on the measurement of ...
Aleksandr Skamyin
doaj   +1 more source

Generation of Coherent XUV Radiation in N2 molecule and its Mixture with Ne Gas using Sub-terawatt Laser System

open access: yesDüzce Üniversitesi Bilim ve Teknoloji Dergisi
High harmonic generation (HHG) in pure nitrogen (N2) and its mixture with neon (Ne) gas was produced. The external laser field producing 6mJ optical pulse energy with 50fs pulse duration at 10Hz repetition rate was focused into a gas jet producing high ...
Muhammed Sayraç
doaj   +1 more source

Stretching An Anisotropic DNA

open access: yes, 2008
We present a perturbation theory to find the response of an anisotropic DNA to the external tension. It is shown that the anisotropy has a nonzero but small contribution to the force-extension curve of the DNA.
B. Eslami-Mossallam   +4 more
core   +1 more source

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

open access: yesFEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei   +3 more
wiley   +1 more source

Anomalous particle-number fluctuations in a three-dimensional interacting Bose-Einstein condensate

open access: yes, 2004
The particle-number fluctuations originated from collective excitations are investigated for a three-dimensional, repulsively interacting Bose-Einstein condensate (BEC) confined in a harmonic trap.
D. Jaksch   +29 more
core   +1 more source

Acoustic Measures Capture Speech Dysfunction in Spinocerebellar Ataxia

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Spinocerebellar ataxias (SCA) are hereditary cerebellar degenerative disorders with a common feature of dysarthria, involving impaired phonatory and articulatory control of speech, thereby affecting social communication. In this study, we investigated whether acoustic measures could objectively measure speech dysfunction and identify
Zena Fadel   +5 more
wiley   +1 more source

Modelling and Validation of a Grid-Connected DFIG by Exploiting the Frequency-Domain Harmonic Analysis

open access: yesApplied Sciences, 2020
Wind Energy Conversion Systems (WECS) based on a Doubly-Fed Induction Generator (DFIG) represent the most common configuration employed in wind turbines.
Emmanuel Hernández-Mayoral   +3 more
doaj   +1 more source

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