Results 121 to 130 of about 101,818 (290)
Integrative Zoology, EarlyView.Male weaponry evolution is often linked to male–male competition, but its relationship with breeding site type remains unclear. Using Leptodactylinae frogs, we found a macroevolutionary correlation between breeding site type and weapon evolution. Also, gains and losses of weapons occurred more frequently in exposed‐breeding sites, an unexpected finding.
Erika M. Santana +3 more
wiley +1 more source
movetrack: An R package to model flight paths from radio‐telemetry networks
Methods in Ecology and Evolution, EarlyView.Abstract Tracking small‐ to large‐scale movements of animals is important for studying their interactions with the environment, including how they adjust and adapt their migration in response to environmental and human‐induced changes. Despite the technical progress in tracking devices, a major challenge remains for small animals—such as songbirds ...
Georg Rüppel +3 more
wiley +1 more source
Methods in Ecology and Evolution, EarlyView.Abstract Optimal allocation of resources to the management of biosecurity risk, threatened species conservation or natural hazards such as bushfires is imperative—because program budgets are usually finite and, therefore, constrained. However, effectively dividing resources among management activities to achieve the greatest benefit remains a ...
Aaron Dodd, Edith Arndt, Anca Hanea
wiley +1 more source
Financial signal processing: a self calibrating model [PDF]
Previous work on multifactor term structure models has proposed that the short rate process is a function of some unobserved diffusion process. We consider a model in which the short rate process is a function of a Markov chain which represents the ...
Barbara M. Jamieson +2 more
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British Journal of Psychology, EarlyView.Abstract This study examined the relationships between generalized trust, climate change conspiracy beliefs and freecycling – a community‐based free‐item sharing pro‐environmental behaviour. It also explored the role of societal factors in relation to participation in freecycling, as well as how they are associated with these relationships.
Algae K. Y. Au +2 more
wiley +1 more source
Some Generalized Entropy Ergodic Theorems for Nonhomogeneous Hidden Markov Models
MathematicsEntropy measures the randomness or uncertainty of a stochastic process, and the entropy rate refers to the limit of the time average of entropy.
Qifeng Yao +3 more
doaj +1 more source
Hierarchical hidden Markov structure for dynamic correlations: the hierarchical RSDC model. [PDF]
This paper presents a new multivariate GARCH model with time-varying conditional correlation structure which is a generalization of the Regime Switching Dynamic Correlation (RSDC) of Pelletier (2006).
Philippe Charlot, Vêlayoudom Marimoutou
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A tutorial on Bayesian model averaging for exponential random graph models
British Journal of Mathematical and Statistical Psychology, EarlyView.Abstract The use of exponential random graph models (ERGMs) is becoming prevalent in psychology due to their ability to explain and predict the formation of edges between vertices in a network. Valid inference with ERGMs requires correctly specifying endogenous and exogenous effects as network statistics, guided by theory, to represent the network ...
Ihnwhi Heo +2 more
wiley +1 more source
British Journal of Mathematical and Statistical Psychology, EarlyView.Abstract The stationary autoregressive model forms an important base of time‐series analysis in today's psychology research. Diverse nonstationary extensions of this model are developed to capture different types of changing temporal dynamics. However, researchers do not always have a solid theoretical base to rely on for deciding a‐priori which of ...
Yong Zhang +4 more
wiley +1 more source
Predictive modeling and statistical inference for Commodity Trading Advisors
Cogent Economics & FinanceThis article focuses on predicting trends in Commodity Trading Advisors (CTAs), also known as trend-following hedge funds. The article applies a Hidden Markov Model (HMM) for classifying trends.
Christian Oliver Ewald, Oskar Fransson
doaj +1 more source