Results 71 to 80 of about 844,582 (367)

Movimento browniano: uma proposta do uso das novas tecnologias no ensino de física

Revista Brasileira de Ensino de Física
A partir de uma breve descrição do movimento browniano analisamos dois vídeos encontrados na rede. Com o software de analise de vídeos e modelagem Tracker é determinado o deslocamento quadrático medio das partículas brownianas.
Jalves S. Figueira
doaj   +1 more source

Moduli of Einstein and non-Einstein nilradicals [PDF]

Geometriae Dedicata, 2010
18 pages, 2 ...
openaire   +3 more sources

Observation of Attractive and Repulsive Polarons in a Bose-Einstein Condensate. [PDF]

Physical Review Letters, 2016
The problem of an impurity particle moving through a bosonic medium plays a fundamental role in physics. However, the canonical scenario of a mobile impurity immersed in a Bose-Einstein condensate (BEC) has not yet been realized.
N. B. Jørgensen, L. Wacker, Kristoffer T. Skalmstang, M. Parish, J. Levinsen, Rasmus S. Christensen, G. Bruun, J. Arlt   +7 more
semanticscholar   +1 more source

Geodesic-Einstein metrics and nonlinear stabilities

, 2018
In this paper, we introduce notions of nonlinear stabilities for a relative ample line bundle over a holomorphic fibration and define the notion of a geodesic-Einstein metric on this line bundle, which generalize the classical stabilities and Hermitian ...
Feng, Huitao, Liu, Kefeng, Wan, Xueyuan
core   +1 more source

Intermetallic Compound Layer Morphology and Distribution in Friction‐Welded Steel–Aluminum Components

Advanced Engineering Materials, EarlyView.
In this study, how friction‐welding parameters (rotational speed, etc.) affect the morphology, distribution, and local thickness of the intermetallic compound layer (IMC‐layer) in friction‐welded steel‐aluminum hybrid components is investigated. In the results, it is shown that lower speeds (700 rpm) lead to a more uniform, thinner IMC‐layer (<0.5 μm),
Christoph Kahra, Armin Piwek, Julius Peddinghaus, Kai Brunotte, Hans Jürgen Maier, Florian Nürnberger, Sebastian Herbst   +6 more
wiley   +1 more source

Quatro abordagens para o movimento browniano

Revista Brasileira de Ensino de Física
A "dança" aleatória de pequenas partículas em suspensão num líquido, um fenômeno conhecido como movimento browniano, foi primeiramente explicado por Einstein na sua famosa tese de doutorado.
J.M. Silva, J.A.S. Lima
doaj   +1 more source

The evolution of radiation towards thermal equilibrium: A soluble model which illustrates the foundations of Statistical Mechanics

, 2003
In 1916 Einstein introduced the first rules for a quantum theory of electromagnetic radiation, and he applied them to a model of matter in thermal equilibrium with radiation to derive Planck's black-body formula.
Boltzmann L., Ehrenfest T., Ehrenfest T., Einstein A., Einstein A., Einstein A., Michael Nauenberg, Planck M.   +7 more
core   +1 more source

Analysis of Temperature and Stress Distribution on the Bond Properties of Hybrid Tailored Formed Components

Advanced Engineering Materials, EarlyView.
Hybrid materials enable high‐performance components but are challenging to process. This study explores an inductive heating concept with spray cooling for steel–aluminum specimens in a two‐step process including friction welding and cup backward extrusion.
Armin Piwek, Eduard Ortlieb, Caner‐Veli Ince, Julius Peddinghaus, Hendrik Wester, Johanna Uhe, Annika Raatz, Kai Brunotte   +7 more
wiley   +1 more source

Einstein Manifolds As Yang-Mills Instantons

, 2013
It is well-known that Einstein gravity can be formulated as a gauge theory of Lorentz group where spin connections play a role of gauge fields and Riemann curvature tensors correspond to their field strengths.
Donaldson S. K., HYUN SEOK YANG, JOHN J. OH, Lawson H. B., Lee J., Misner C. W., Oh J. J.   +6 more
core   +1 more source

Thermokinetic Modeling Approach for Aluminide Diffusion Coatings on Molybdenum Substrates

Advanced Engineering Materials, EarlyView.
The advancement of innovative materials for protective coatings in high‐temperature environments relies on a detailed understanding of diffusion processes within these systems. This article presents findings from modeling approaches, supporting the development and optimization of coating materials by focusing on the prediction of diffusion‐driven ...
Jurica Filipovic, Katharina Beck, Christian Kontermann, Mathias Galetz, Matthias Oechsner   +4 more
wiley   +1 more source