Results 61 to 70 of about 1,447,206 (291)
Periodic solutions for second order Hamiltonian systems
Le Matematiche, 2011 In this paper we present some recent multiplicity results for a class of second order Hamiltonian systems. Exploiting the variational structure of the problem, it will be shown how the existence of multiple, even infinitely many, periodic solutions can ...
Giuseppina D'Aguì, Roberto Livrea
doaj
Density-operator theory of orbital magnetic susceptibility in periodic insulators
, 2011 The theoretical treatment of homogeneous static magnetic fields in periodic systems is challenging, as the corresponding vector potential breaks the translational invariance of the Hamiltonian.
J. W. Zwanziger, R. M. Martin, X. Gonze
core +1 more source
$M$-periodic problem of order $2k$
Topological Methods in Nonlinear Analysis, 1998 The author gives sufficient conditions for the existence of solutions to some general matrix-periodic problems of higher even order, which have a variational structure. A key tool in the proofs is a generalization of the Du Bois-Reymond lemma for periodic functions of order one, which was proved by the author in a previous work [Gȩba, Kazimierz (ed ...
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Raman‐based label‐free microscopic analysis of the pancreas in living zebrafish larvae
FEBS Open Bio, EarlyView.Forward stimulated Raman scattering (F‐SRS) and epi coherent anti‐Stokes Raman scattering (E‐CARS) allow label‐free discrimination of distinct subcellular structures in the pancreas of living zebrafish larvae. Given the straightforward applicability, we anticipate broad implementation of Raman microscopy in other organs and across various biomedical ...
Noura Faraj +3 more
wiley +1 more source
Time-periodic corner states from Floquet higher-order topology
Nature Communications, 2022 A combination of Floquet engineering and higher-order topological insulators has been lately only theoretically proposed. Here the authors experimentally realize an acoustic waveguides array to demonstrate a Floquet higherorder topological insulator ...
Weiwei Zhu +4 more
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On lattice ordered periodic semigroups [PDF]
Czechoslovak Mathematical Journal, 1993 The purpose of this note is to give some algebraic properties of lattice- ordered periodic semigroups and particularly in the finite case. The main results. Classes of the following equivalence relation \(\mathcal F\) are called spindles and will be denoted \(F_ e\), where \(e\) is the idempotent of this class: \(a\equiv b{\mathcal F}\Leftrightarrow e ...
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FEBS Open Bio, EarlyView.dUTPases are involved in balancing the appropriate nucleotide pools. We showed that dUTPase is essential for normal development in zebrafish. The different zebrafish genomes contain several single‐nucleotide variations (SNPs) of the dut gene. One of the dUTPase variants displayed drastically lower protein stability and catalytic efficiency as compared ...
Viktória Perey‐Simon +6 more
wiley +1 more source
On Periodic Solutions of Higher-Order Functional Differential Equations
Boundary Value Problems, 2008 For higher-order functional differential equations and, particularly, for nonautonomous differential equations with deviated arguments, new sufficient conditions for the existence and uniqueness of a periodic solution are established.
B. Půža +2 more
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Affine algebraic groups with periodic components
, 2008 A connected component of an affine algebraic group is called periodic if all its elements have finite order. We give a characterization of periodic components in terms of automorphisms with finite number of fixed points.
A. L. Onishchik +10 more
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FEBS Open Bio, EarlyView.ZFAS1 is a lncRNA promoting cell proliferation and migration, exhibiting high expression in various cancers. It is conserved, widely expressed, and produces multiple splice variants with unclear roles. We identified several splice variants in hepatocyte models, and found that inhibiting or suppressing regulators of the unfolded protein response (PERK ...
Sébastien Soubeyrand +2 more
wiley +1 more source