Results 51 to 60 of about 471,373 (286)
Biotik: Jurnal Ilmiah Biologi Teknologi dan Kependidikan, 2021 The Ketambe Research Center is a natural laboratory and one of the nature conservation areas in Indonesia which are rich in biodiversity, located in Gunung Leuser National Park (TNGL). One of the plants found was the Kayu Lasun plant (Dysoxylum alliaceum)
Mulyadi Mulyadi +5 more
doaj +1 more source
Resummed effective action in the world-line formalism
, 2003 Using the world-line method we resum the scalar one-loop effective action. This is based on an exact expression for the one-loop action obtained for a background potential and a Taylor expansion of the potential up to quadratic order in x-space.
Brown +15 more
core +1 more source
Quadratic perturbations of a class of quadratic reversible systems with two centers
Discrete & Continuous Dynamical Systems - A, 2009 Quadratic perturbations of a one-parameter family of quadratic reversible systems with two centers (without other singularities in finite plane) are studied. The exact upper bound of the number of limit cycles, the configurations of limit cycles, and the bifurcation diagrams for different range of the parameter are given.
B. Coll, Chengzhi Li, Rafel Prohens
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Nilpotent Center in a Continuous Piecewise Quadratic Polynomial Hamiltonian Vector Field
International Journal of Bifurcation and Chaos, 2022 In this paper, we study the global dynamics of continuous piecewise quadratic Hamiltonian systems separated by the straight line [Formula: see text], where these kinds of systems have a nilpotent center at [Formula: see text], which comes from the combination of two cusps of both Hamiltonian systems.
Chen, Ting, Llibre, Jaume
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Arthritis Care &Research, Accepted Article.Objectives This study aimed to investigate hand function trajectories over 5 years in primary hand osteoarthritis. Additionally, determinants of baseline and longitudinal hand function were assessed. Methods 538 patients with both baseline and 5‐year study visits were analyzed.
Annemiek V.E.M. Olde Meule +4 more
wiley +1 more source
Resonances for a Hydrogenic System or a Harmonic Oscillator Strongly Coupled to a Field
, 2008 We calculate resonances which are formed by a particle in a potential which is either Coulombian or quadratic when the particle is strongly coupled to a massless boson, taking only two energy levels into consideration.
Cohen-Tannoudji C., Jaksic V.
core +2 more sources
Quadratic perturbations of a quadratic reversible Lotka-Volterra system with two centers
Discrete and Continuous Dynamical Systems, 2014 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Peng, Linping +2 more
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Discordance Between Patient and Physician Global Assessments in Early Systemic Sclerosis
Arthritis Care &Research, EarlyView.Objective This study aims to identify factors associated with patient global assessment (PtGA) and physician global assessment (PhGA) and discordance between them in systemic sclerosis (SSc). Methods Data from adults with early SSc (<5 years) from the Collaborative National Quality and Efficacy Registry were included.
Ellen Romich +35 more
wiley +1 more source
Optimal Vibration Suppression in Modal Space for Flexible Beams Subjected to Moving Loads
Shock and Vibration, 1997 Optimal independent modal space control for vibration suppression of beam structures traversed by a moving concentrated force was examined. Two control methodologies, optimal linear quadratic tracking and an optimal linear quadratic regulator, were ...
Yih-Hwang Lin
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Advanced Engineering Materials, Volume 27, Issue 6, March 2025.The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez +5 more
wiley +1 more source