Results 21 to 30 of about 365,910 (236)

Hybrid FDTD algorithm for electromagnetic analysis of fine structures

open access: yesResults in Physics, 2021
A new hybrid Finite-Difference Time-Domain (hybrid FDTD) algorithm is proposed in this paper. This hybrid FDTD method combines the superiorities of explicit unconditionally stable FDTD (US-FDTD) and traditional FDTD methods to achieve unconditional ...
Sihan Zhao   +4 more
doaj   +1 more source

Walking, drawing, designing. Friedrich Ludwig von Sckell’s drawing stick and eighteenth-century landscape gardens

open access: yesRi-vista: Ricerche per la Progettazione del Paesaggio, 2022
For the German landscape gardener Friedrich Ludwig von Sckell (1750-1823) walking was a method to design landscapes for visitation and inhabitation, in other words, for both walking and staying.
Sonja Dümpelmann
doaj   +1 more source

Numerical relativity with the conformal field equations [PDF]

open access: yes, 2002
I discuss the conformal approach to the numerical simulation of radiating isolated systems in general relativity. The method is based on conformal compactification and a reformulation of the Einstein equations in terms of rescaled variables, the so ...
Husa, Sascha
core   +2 more sources

Frank Lloyd Wright and the play with geometric abstraction

open access: yesFestival dell'Architettura Magazine, 2020
Friedrich Fröbel is known in history as the creator of the Kindergarten, a pedagogical institution established in Germany in 1837 that spread all over the world in fifty years.
Cosimo Monteleone
doaj   +1 more source

Complex Envelope Approximate Crank-Nicolson Method and Its Open Boundary Implementation for Bandpass Problem

open access: yesIEEE Access, 2021
To efficiently simulate the bandpass electromagnetic problems by employing the finite-difference time-domain (FDTD) algorithm, unconditionally stable implementation is proposed based upon the complex envelope method and the Crank-Nicolson Direct ...
Shihong Wu   +4 more
doaj   +1 more source

Crystal structure of the high-pressure phase of the oxonitridosilicate chloride Ce4[Si4O3 + xN7 − x]Cl1 − xOx, x≃0.2 [PDF]

open access: yes, 2006
The structural compression mechanism of Ce4[Si4O3 + xN7 − x]Cl1 − xOx, x≃ 0.2, was investigated by in situ single-crystal synchrotron X-ray diffraction at pressures of 3.0, 8.5 and 8.6 GPa using the diamond–anvil cell technique.
Friedrich, Alexandra   +6 more
core   +1 more source

A dialética como discurso do método Dialetics as method working process

open access: yesTempo Social, 2005
Uma vertente da tradição marxista adota como critério de filiação a essa linhagem a fidelidade à metodologia de Marx. Este, no entanto, não escreveu nada semelhante a um tratado sobre o método.
Ricardo Musse
doaj   +1 more source

A Brief History and Practical Applications in DNA Extraction

open access: yesCHIMIA, 2020
In the late 1860s, DNA was first identified by the Swiss physician and biochemist Friedrich Miescher. Since this time, we have solved its structure, learned how DNA divides in our cells, and elucidated molecular mechanisms for the transmission ...
Hailey L. Gahlon
doaj   +1 more source

Friedrich Ackermann’s scientific research program

open access: yesGeo-spatial Information Science, 2023
We sketch Friedrich Ackermann’s research program following the concept of Imre Lakatos, with some historical key developments in the theory and application of aerotriangulation and image matching.
Wolfgang Förstner
doaj   +1 more source

Numerical evolution of axisymmetric, isolated systems in General Relativity [PDF]

open access: yes, 2002
We describe in this article a new code for evolving axisymmetric isolated systems in general relativity. Such systems are described by asymptotically flat space-times which have the property that they admit a conformal extension.
A. Ashtekar   +19 more
core   +2 more sources

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