Results 11 to 20 of about 273,908 (268)
TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica
The Astronomical Journal, 2023 We present the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. This planet was first identified in TESS photometry and confirmed using ground-based photometry from ASTEP in Antarctica including a full 6.5 hr ...
Melissa J. Hobson +51 more
doaj +1 more source
A discrete time method to the first variation of fractional order variational functionals [PDF]
Open Physics, 2013 Abstract The fact that the first variation of a variational functional must vanish along an extremizer is the base of most effective solution schemes to solve problems of the calculus of variations. We generalize the method to variational problems involving fractional order derivatives.
Pooseh, S., Almeida, R., Torres, D.F.M.
openaire +4 more sources
Variational methods for time-dependent classical many-particle systems [PDF]
Physica A: Statistical Mechanics and its Applications, 2013 A variational method for the classical Liouville equation is introduced that facilitates the development of theories for non-equilibrium classical systems. The method is based on the introduction of a complex-valued auxiliary quantity Ψ that is related to the classical position-momentum probability density ρ via ρ = Ψ*Ψ.
Yuriy V, Sereda, Peter J, Ortoleva
openaire +2 more sources
PLoS ONE, 2023 IntroductionEthiopia is one of the countries facing a very high burden of perinatal death in the world. Despite taking several measures to reduce the burden of stillbirth, the pace of decline was not that satisfactory.
Neamin Tesfay +5 more
doaj +1 more source
Estimating the timing of mother-to-child transmission of the human immunodeficiency virus type 1 using a viral molecular evolution model. [PDF]
PLoS ONE, 2014 Mother-to-child transmission (MTCT) is responsible for most pediatric HIV-1 infections worldwide. It can occur during pregnancy, labor, or breastfeeding. Numerous studies have used coalescent and molecular clock methods to understand the epidemic history
Antoine Chaillon +10 more
doaj +1 more source
National Journal of Physiology, Pharmacy and Pharmacology, 2021 Background: From the past decade, changes in various dimensions of lifestyles of the individuals have become inevitable which is evident in sleep onset timing variation like never before.
Pradeep Reddy Srikaram +2 more
doaj +1 more source
Variational iteration method for the time-fractional Fornberg–Whitham equation
Computers & Mathematics with Applications, 2012 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Mehmet Giyas Sakar +2 more
openaire +2 more sources
Note on the Deformed Boson Scheme in Time-Dependent Variational Method [PDF]
Progress of Theoretical Physics, 2002 7 pages, no figure, using PTPTeX ...
Kuriyama, Atsushi +4 more
openaire +3 more sources
Movement Ecology, 2019 Background Anthropogenic changes in the climate and environment have globally affected ecological processes such that the spatiotemporal occurrence of the main annual cycle events (i.e., breeding, wintering, moulting, and migration) has shifted in ...
Heiko Schmaljohann
doaj +1 more source
Variation of Lyapunov′s Method for Dynamic Systems on Time Scales
Journal of Mathematical Analysis and Applications, 1994 The authors consider a dynamical system on a general time scale. This formulation unifies the standard treatment for continuous time and discrete time systems. Based on a well known comparison principle, the authors obtain a comparison theorem which makes use of Lyapunov functions.
Kaymakcalan, B., Rangarajan, L.
openaire +1 more source