Results 71 to 80 of about 166,028,341 (301)
Variational and penalization methods for studying connecting orbits of Hamiltonian systems
Electronic Journal of Differential Equations, 2000 In this article, we consider a class of second order Hamiltonian systems that possess infinite or finite number of equilibria. Variational arguments will be used to study the existence of connecting orbits joining pairs of equilibria.
Chao-Nien Chen, Shyuh-yaur Tzeng
doaj
FEBS Letters, EarlyView.Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure +3 more
wiley +1 more source
Provably correct Java implementations of Spi Calculus security protocols specifications [PDF]
, 2010 Spi Calculus is an untyped high level modeling language for security protocols, used for formal protocols specification and verification. In this paper, a type system for the Spi Calculus and a translation function are formally defined, in order to ...
Pironti, Alfredo, Sisto, Riccardo
core +1 more source
Sobolev inequalities in 2-D hyperbolic space: A borderline case
Journal of Inequalities and Applications, 1998 Sobolev inequalities in two-dimensional hyperbolic space are dealt with. Here is modeled on the upper Euclidean. half-plane equipped with the Poincaré–Bergman metric.
Mugelli Francesco, Talenti Giorgio
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NVIS HF signal propagation in ionosphere using calculus of variations
Geodesy and Geodynamics, 2019 Modeling Near Vertical Incidence Sounding (NVIS) High Frequency (HF) signal propagation in the ionosphere is important. Because, ionosondes which are special types of radars probing the ionosphere with certain HF frequencies (between 2 and 30 MHz), work ...
Umut Sezen, Feza Arikan, Orhan Arikan
doaj +1 more source
Degradation mechanism of the von Willebrand factor A2 domain by nattokinase
FEBS Letters, EarlyView.Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto +3 more
wiley +1 more source
Automatic computation of conservation laws in the calculus of variations and optimal control
, 2005 We present analytical computational tools that permit us to identify, in an automatic way, conservation laws in optimal control. The central result we use is the famous Noether's theorem, a classical theory developed by Emmy Noether in 1918, in the ...
Gouveia, Paulo D.F., Torres, Delfim F.M.
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A Direct Approach to Shape Optimisation of Structures
Engineering Transactions, 1979 Shape optimisation of structures constitutes - mathematically a non-standard problem of the calculus of variations consisting in searching for the conditional extremum of a functional which does not possess, as a rule, a "localization property".
Z.K. Leśniak
doaj
FEBS Letters, EarlyView.We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace +6 more
wiley +1 more source
Understanding the calculus [PDF]
, 1985 A number of significant changes have have occurred recently that give us a golden opportunity to review the teaching of calculus. The most obvious is the arrival of the microcomputer in the mathematics classroom, allowing graphic demonstrations and ...
Tall, David
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