Results 41 to 50 of about 3,397,715 (333)

Uma aplicação do método da mínima restrição de Gauss

Revista Brasileira de Ensino de Física
O método da mínima restrição de Gauss é recapitulado e aplicado à solução do movimento de uma esfera sobre solo rugoso sob a ação de força (dentro de certas aproximações).
G.F. Leal Ferreira
doaj   +1 more source

Close Binary Stars Modeled by Two Prolate Ellipsoids in Synchronous Rotation

The Astronomical Journal, 2023
The presence of tidal deformations in close binary stars has already been confirmed by astronomical observations. The present paper aims to simply address an astronomy problem, studying the relative movement of close binaries disturbed by their mutual ...
Antonio Elipe, M. Lívia da Costa, Luca Piccotti, Eva Tresaco   +3 more
doaj   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

Novel Analytical and Numerical Approximations to the Forced Damped Parametric Driven Pendulum Oscillator: Chebyshev Collocation Method

Journal of Mathematics, 2022
In this work, some novel approximate analytical and numerical solutions to the forced damped driven nonlinear (FDDN) pendulum equation and some relation equations of motion on the pivot vertically for arbitrary angles are obtained.
M.R. Alharthi, Alvaro H. Salas, Wedad Albalawi, S.A. El-Tantawy   +3 more
doaj   +1 more source

Changes of the topological charge of vortices

, 2002
We consider changes of the topological charge of vortices in quantum mechanics by investigating analytical examples where the creation or annihilation of vortices occurs.
Andronikashvili E L, Bialynicki-Birula I, Bialynicki-Birula I, Bogdan Damski, Bolda E L, Brambrilla M, Cohen-Tannoudji C, Dalfovo F, Feynman R P, Feynman R P, Góral K, Koplik J, Krzysztof Sacha, Landau L D, Madison K W, Matthews M R, Molina-Terriza G, Molina-Terriza G   +17 more
core   +1 more source

Linked dimers of the AAA+ ATPase Msp1 reveal energetic demands and mechanistic plasticity for substrate extraction from lipid bilayers

FEBS Letters, EarlyView.
Cells must clear mislocalized or faulty proteins from membranes to survive. The AAA+ ATPase Msp1 performs this task, but dissecting how its six subunits work together is challenging. We engineered linked dimers with varied numbers of functional subunits to reveal how Msp1 subunits cooperate and use energy to extract proteins from the lipid bilayer ...
Deepika Gaur, Brian Acquaviva, Baylee A. Smith, Nathan Walker, Isabella Walter, Matthew L. Wohlever   +5 more
wiley   +1 more source

On the Origins of Hamilton’s Principle(s)

Encyclopedia
This entry first provides an overview of the historical, cultural and epistemological background that is key for Hamilton’s positions on mechanics. We consider the investigations on geometrical optics in the 17th and 18th centuries, Euler’s and Lagrange ...
Paolo Bussotti, Danilo Capecchi, Giuseppe Ruta   +2 more
doaj   +1 more source

A Generalized Analytical Mechanics in which Quantum Phenomena Appear [PDF]

, 2015
We propose a mechanics of a massive particle in a potential field effective for both classical and quantum system as a modified classical analytical mechanics (modified CM). We transform, under coordinate transformation, the covariant tensor of order two
Yasuda, Masao
core  

Photosynthesis under far‐red light—evolutionary adaptations and bioengineering of light‐harvesting complexes

FEBS Letters, EarlyView.
Phototrophs evolved light‐harvesting systems adapted for efficient photon capture in habitats enriched in far‐red radiation. A subset of eukaryotic pigment‐binding proteins can absorb far‐red photons via low‐energy chlorophyll states known as red forms.
Antonello Amelii, Edoardo Andrea Cutolo, Daniele Montepietra, Claudia Battarra, Roberto Caferri, Stefano Capaldi, Zeno Guardini, Luca Dall'Osto, Roberto Bassi   +8 more
wiley   +1 more source

Approximate analytical and numerical solutions of a nonlinear boundary value problem in fluid mechanics based on symmetry reduction

Partial Differential Equations in Applied Mathematics, 2020
This work presents applications of the Liesymmetry method to a boundary value problem (BVP) of the governing equations in fluid mechanics. The Wu differential characteristic set algorithm is used to obtain a group of multi-parameter symmetries for the ...
Litao Gai, Mingchu Li, Bilige Sudao
doaj   +1 more source