Results 21 to 30 of about 13,975,826 (243)
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.
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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
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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
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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
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Endoscopy International Open, 2020 Background and study aims There is a consensus among gastroenterology organizations that elective endoscopic procedures should be deferred during the COVID-19 pandemic.
Mohammad Bilal +8 more
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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
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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
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Methods Used in the Seasonal Variations Analysis Of Time Series [PDF]
Revista Română de Statistică, 2013 Statistical data established in dynamic or time series differ from other data sets being ordered according to the time variable. Herein lies the importance of studying the time series. You can determine the important role of the time factor in socio-economic phenomena as well as in other areas.
Angelica BACESCU-CARBUNARU +1 more
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The Astrophysical JournalTransit timing variations (TTVs) are considered a tool for constraining the masses of transiting planets in the absence of radial velocity data. Although theoretical studies have long revealed that TTV mass determinations intrinsically suffer from ...
Sheng Jin +3 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider +15 more
wiley +1 more source