Results 1 to 10 of about 430,842 (166)
A General Model of Population Dynamics Accounting for Multiple Kinds of Interaction [PDF]
Complexity, 2020 Population dynamics has been modelled using differential equations almost since Malthus times, more than two centuries ago. Basic ingredients of population dynamics models are typically a growth rate, a saturation term in the form of Verhulst’s logistic ...
Luciano Stucchi +3 more
doaj +2 more sources
A general modeling framework for describing spatially structured population dynamics [PDF]
Ecology and Evolution, 2018 Variation in movement across time and space fundamentally shapes the abundance and distribution of populations. Although a variety of approaches model structured population dynamics, they are limited to specific types of spatially structured populations ...
Christine Sample +12 more
doaj +4 more sources
Local existence for a general model of size-dependent population dynamics [PDF]
Abstract and Applied Analysis, 1997 We shall investigate a size structured population dynamics with aging and birth functions having general forms. The growth rate we deal with depends not only on the size but also on time.
Nobuyuki Kato, Hiroyuki Torikata
doaj +3 more sources
A General Discrete Time Model of Population Dynamics in the Presence of an Infection [PDF]
Discrete Dynamics in Nature and Society, 2009 We present a set of difference equations which generalizes that proposed in the work of G. Izzo and A. Vecchio (2007) and represents the discrete counterpart of a larger class of continuous model concerning the dynamics of an infection in an organism or ...
Giuseppe Izzo +2 more
doaj +4 more sources
How to Achieve Universal Health Coverage: A Case Study of Uganda Using the Political Process Model; Comment on “Health Coverage and Financial Protection in Uganda: A Political Economy Perspective” [PDF]
International Journal of Health Policy and Management, 2023 How can resource-deprived countries accelerate progress towards universal health coverage (UHC)? Here we extend the analysis of Nanini and colleagues to investigate a case-study of Uganda, where despite high-level commitments, health system priority and ...
Cidalia Eusebio +2 more
doaj +1 more source
Aspiration dynamics generate robust predictions in heterogeneous populations [PDF]
Nature Communications, 2021 AbstractUpdate rules, which describe how individuals adjust their behavior over time, affect the outcome of social interactions. Theoretical studies have shown that evolutionary outcomes are sensitive to model details when update rules are imitation-based but are robust when update rules are self-evaluation based.
Lei Zhou, Bin Wu, Jinming Du, Long Wang
openaire +3 more sources
Nature Communications, 2023 Dengue is expanding globally, but how dengue emergence is shaped locally by interactions between climatic and socio-environmental factors is not well understood.
Rory Gibb +20 more
doaj +1 more source
Some General Relationships in Population Dynamics [PDF]
Population Index, 1984 Important recent research by Samuel Preston and Ansley Coale (1982) extends the Lotka system of stable population equations (Lotka, 1939) to any population. Here we present an alternative general system and describe its duality with the Preston-Coale system.
Arthur, W.B., Vaupel, J.W.
openaire +3 more sources
Journal of Cardiovascular Development and Disease, 2023 Blood pressure (BP) dynamics during graded exercise testing provide important insights into cardiovascular health, particularly in athletes. These measurements, taken during intense physical exertion, complement and often enhance our understanding beyond
Petra Pesova +11 more
doaj +1 more source
Predictability of Population Fluctuations
Mathematics, 2022 Population dynamics is affected by environmental fluctuations (such as climate variations), which have a characteristic correlation time. Strikingly, the time scale of predictability can be larger for the population dynamics than for the underlying ...
Rodrigo Crespo-Miguel +1 more
doaj +1 more source