Results 41 to 50 of about 2,169,888 (325)

The Hamiltonian formulation of classical field theory [PDF]

, 1988
In this paper I shall present some result from the theory of classical non-relativistic field theory and discuss how they might be useful in the general relativistic context. Some of the Hamiltonian formalism has already been successfully employed in the
Marsden, Jerrold E.
core   +1 more source

Stability of Boolean and Continuous Dynamics [PDF]

Physical Review Letters, 2011
Regulatory dynamics in biology is often described by continuous rate equations for continuously varying chemical concentrations. Binary discretization of state space and time leads to Boolean dynamics. In the latter, the dynamics has been called unstable if flip perturbations lead to damage spreading.
Konstantin Klemm, Fakhteh Ghanbarnejad
openaire   +4 more sources

Network topology drives population temporal variability in experimental habitat networks

Population Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu, J. Angus Webb, William D. Bovill, Elise L. King   +3 more
wiley   +1 more source

Between Droughts and Floods: The Seasonal Response of Freshwater Snails in Artificial Reservoirs in the Brazilian Semiarid Region

Population Ecology, EarlyView.
We investigate the seasonal dynamics of two freshwater snails, Biomphalaria straminea and Melanoides tuberculata, in artificial reservoirs of the Brazilian semiarid region. Despite regulated hydrology, B. straminea exhibited strong seasonal fluctuations associated with dry periods, while M. tuberculata maintained stable populations throughout the year,
Lucas Henrique Sousa da Silva, João Hemerson de Sousa, Adriana Josefa da Rocha, Manuella Feitosa Leal, Lucas Ariel de Sousa Aguiar, Tamaris Gimenez Pinheiro, Edson Lourenço da Silva   +6 more
wiley   +1 more source

Fast generation of stability charts for time-delay systems using continuation of characteristic roots

, 2020
Many dynamic processes involve time delays, thus their dynamics are governed by delay differential equations (DDEs). Studying the stability of dynamic systems is critical, but analyzing the stability of time-delay systems is challenging because DDEs are ...
Samukham, Surya, Uchida, Thomas K., Vyasarayani, C. P.   +2 more
core   +1 more source

Dynamics and stability of the Gödel universe [PDF]

Classical and Quantum Gravity, 2004
We use covariant techniques to describe the properties of the Godel universe and then consider its linear response to a variety of perturbations. Against matter aggregations, we find that the stability of the Godel model depends primarily upon the presence of gradients in the centrifugal energy, and secondarily on the equation of state of the fluid ...
Christos G. Tsagas, Christos G. Tsagas, John D. Barrow   +2 more
openaire   +4 more sources

Infection Models for Pine Wilt Disease on the Basis of Vector Behaviors

Population Ecology, EarlyView.
Infection models for pine wilt disease without vector density were built to estimate the transmission coefficient of the pathogenic nematode. The models successfully simulated the annual change in the density of infected trees for four pine stands. ABSTRACT Pine wilt disease is caused by the pinewood nematode (Bursaphelenchus xylophilus Steiner et ...
Katsumi Togashi
wiley   +1 more source

The Scapular’s Roles in Developing Shoulder Complex Function

Indonesian Contemporary Nursing Journal
The scapulohumeral anatomy and biomechanics interact to provide adequate mobility, thus the scapula plays various functions in facilitating optimal shoulder complex function (Paine & Voight., 2013).
Rijal Rijal
doaj   +1 more source

Aerodynamic and stability analysis of the Safat01 aircraft [PDF]

Scientific Technical Review, 2015
This paper aimed to predict aerodynamic & stability data for the Safat01 aircraft. Because of its economic and time efficiency, the Digital DATCOM program has been used to predict the stability and control derivatives for the subsonic, low angle of ...
Qurashi Rania, Alhadi Mohmmed, Abudarag Sakher, Vujić Dragoljub   +3 more
doaj  

Wealth inequality and dynamic stability [PDF]

Journal of Economic Theory, 2005
In this paper we explore the link between wealth inequality and stability in a two-sector neoclassical growth model with heterogeneous agents. The stability of the steady state depends on the various parameters of the model and in particular on individual preferences.
Christian Ghiglino, Christian Ghiglino
openaire   +6 more sources