Results 41 to 50 of about 27,771,751 (275)

A three‐level time‐split MacCormack method for two‐dimensional nonlinear reaction‐diffusion equations

open access: yesInternational Journal for Numerical Methods in Fluids, 2020
A three‐level explicit time‐split MacCormack method is proposed for solving the two‐dimensional nonlinear reaction‐diffusion equations. The computational cost is reduced thank to the splitting and the explicit MacCormack scheme.
E. Ngondiep   +3 more
semanticscholar   +1 more source

Fast online deconvolution of calcium imaging data [PDF]

open access: yesPLoS Comput. Biol., 2016
Fluorescent calcium indicators are a popular means for observing the spiking activity of large neuronal populations, but extracting the activity of each neuron from raw fluorescence calcium imaging data is a nontrivial problem.
Johannes Friedrich   +2 more
semanticscholar   +1 more source

Molecular rheotaxis directs DNA migration and concentration against a pressure-driven flow

open access: yesNature Communications, 2017
Implementing a nucleic acid preconcentration method can improve the sensitivity of microfluidic analysis systems. Here Friedrich et al. concentrate DNA by many orders of magnitude using pressure-driven flow, which could lead to a simple and practical ...
Sarah M. Friedrich   +4 more
doaj   +1 more source

Efficient Frequency-Dependent Newmark-Beta-FDTD Method for Periodic Grating Calculation

open access: yesIEEE Photonics Journal, 2016
In this paper, the Newmark-Beta algorithm is introduced into the finite-difference time-domain (FDTD) method in dispersion media, resulting in an unconditionally stable method for periodic metallic grating analysis.
Sheng-Bing Shi   +5 more
doaj   +1 more source

From Selfhood to Social Solidarity; From a Mind towards the Collective Thinking and Working Bodies: A Marxist Approach

open access: yesScientia, 2022
What our minds and conceive, our bodies can achieve. I will argue that “the mind is not then an autonomous substance, capable of forming its own states without recourse to what lies beyond it: it states arrive by courtesy of a specific external ...
Jose Mario De Vega
doaj   +1 more source

ADI-MRTD Algorithm for Periodic Structures Analysis

open access: yesInternational Journal of Antennas and Propagation, 2018
In this paper, a novel algorithm based on the alternating direction implicit (ADI) multiresolution time-domain (MRTD) method for periodic structure simulation is proposed.
Xiaohua Dong   +4 more
doaj   +1 more source

Systematic Design of the Lead-Lag Network Method for Active Damping in LCL-Filter Based Three Phase Converters

open access: yesIEEE Transactions on Industrial Informatics, 2014
Three-phase active rectifiers guarantee sinusoidal input currents and unity power factor at the price of a high switching frequency ripple. To adopt an LCL-filter, instead of an L-filter, allows using reduced values for the inductances and so preserving ...
R. Peña-Alzola   +5 more
semanticscholar   +1 more source

Ozone measurement practice in the laboratory using Schönbein's method [PDF]

open access: yesGeoscience Communication, 2020
We present a laboratory technique to measure tropospheric ozone, following a traditional method developed by Christian Friedrich Schönbein in the 19th century.
I. A. Ramirez-Gonzalez   +4 more
doaj   +1 more source

War and Revolution: Friedrich Engels as a Military and Political Thinker

open access: yesWar & Society, 2019
This article explores the link between political and military strategy and tactics in the work of Friedrich Engels. Though widely praised for his understanding of military affairs, Engels’ interlocutors have tended to be dismissive of his political works.
P. Blackledge
semanticscholar   +1 more source

The problem of the Russian Federation image formation by German think tanks in the context of the Syrian crisis (case of Friedrich-Ebert-Stiftung)

open access: yesVestnik RUDN. International Relations, 2018
The relevance of the research topic due to the ever-increasing role of the analytical institutions in the process of formation of Russia’s image in the public consciousness.
Natalia Viktorovna Ivkina
doaj   +1 more source

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