Results 171 to 180 of about 17,794,585 (208)

Generation time and temporal scaling of bird population dynamics

Nature, 2005
Theoretical studies have shown that variation in density regulation strongly influences population dynamics, yet our understanding of factors influencing the strength of density dependence in natural populations still is limited. Consequently, few general hypotheses have been advanced to explain the large differences between species in the magnitude of
Sæther, B.-E., Lande, R., Engen, S., Weimerskirch, H., Lillegård, M., Altwegg, R., Becker, P. H., Bregnballe, T.; id_orcid 0000-0003-2867-478X, Brommer, J. E., McCleery, R. H., Merilä, J., Nyholm, E., Rendell, W., Robertson, R. R., Tryjanowski, P., Visser, M. E.   +15 more
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Generalized ridge analysis with application to population pharmacokinetics/dynamics

Journal of Biopharmaceutical Statistics, 1996
Given a set of measurements on a patient in clinical studies or on a drug response in bioassays and immunoassays, the data series for the individual can be incomplete, noisy, and haphazard. Hence, meaningful analysis on such limited data is at best difficult given the typical assumptions on the nonlinear structure of systematic and random components ...
J M, Minor, H, Namini, G A, Watson
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A generational genetic algorithm with dynamic population size

Proceedings of the 47th Annual Southeast Regional Conference, 2009
In this paper, a Generational Genetic Algorithm with Dynamic Population Size (GGAWD) is proposed. This algorithm and other Genetic Algorithms (GAs) are applied to F6* and F7* functions in order to find which algorithm is the best. The same evaluation times and runs are used to compare the effectiveness of the algorithms.
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A General Method for Modeling Population Dynamics and Its Applications

Acta Biotheoretica, 2013
Studying populations, be it a microbe colony or mankind, is important for understanding how complex systems evolve and exist. Such knowledge also often provides insights into evolution, history and different aspects of human life. By and large, populations' prosperity and decline is about transformation of certain resources into quantity and other ...
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General practitioner distribution and population dynamics: Munich, 1950–1990

Social Science & Medicine, 1994
The problem of variable geographic distribution of physicians appears to be universal and intransigent. There is growing evidence from several developed countries of primary physicians avoiding areas in large cities increasingly populated by poor and ethnic minorities. This paper extends the research to Germany.
G W, Shannon, M P, Cutchin
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Sparse generalized Laguerre-Volterra model of neural population dynamics

2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2009
To understand the function of a brain region, e.g., hippocampus, it is necessary to model its input-output property. Such a model can serve as the computational basis of the development of cortical prostheses restoring the transformation of population neural activities performed by the brain region.
Dong, Song, Rosa H M, Chan, Vasilis Z, Marmarelis, Robert E, Hampson, Sam A, Deadwyler, Theodore W, Berger   +5 more
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Population dynamic models generating the lognormal species abundance distribution

Mathematical Biosciences, 1996
This paper deals with a new class of stochastic species abundance models where the abundances are the points of an inhomogeneous Poisson process. These models are the result of a dynamic approach in which the changes in abundances through time are described by a multivariate diffusion and speciation constitutes a homogeneous Poisson process.
Engen, Steinar, Lande, Russell
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A General Population Dynamics Theory for Largemouth Bass [PDF]

, 2019
Bass Research ...
Jester, Douglas B. Jr., Garling, Donald L. Jr., Tipton, Alan R., Lackey, Robert T.   +3 more
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Mobidyc, a generic multi-agents simulator for modeling populations dynamics

1998
We present a simulator designed to help scientists who are not experts in computing, such as biologists, to build up, run, and update their models in the field of fish population dynamics. This simulator, written in Smalltalk, is built upon multi-agents concepts and is well suited to model systems where individual or spatial aspects are involved.
Ginot, Vincent, Le Page, Christophe
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A general dynamic model of 19th century US population change

Economic Modelling, 1985
"The pattern of rural population growth in 23 northern states during the period 1790 to 1900 is examined using a general dynamic approach. The relationship between fertility, migration and population growth is analysed within a single settlement model and a control solution is produced which demonstrates that fertility and migration behaviour reacted ...
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