A5025865739- Quantum chaos and dynamical systems
- Evolution and Genetic Dynamics
- Plant and animal studies
- Evolutionary Game Theory and Cooperation
- Nonlinear Dynamics and Pattern Formation
- Complex Network Analysis Techniques
- Cold Atom Physics and Bose-Einstein Condensates
- Opinion Dynamics and Social Influence
- Mathematical and Theoretical Epidemiology and Ecology Models
- Genetic diversity and population structure
- Quantum Mechanics and Non-Hermitian Physics
- Spectroscopy and Quantum Chemical Studies
- Complex Systems and Time Series Analysis
- Quantum Mechanics and Applications
- Animal Ecology and Behavior Studies
- Evolution and Paleontology Studies
- Ecology and Vegetation Dynamics Studies
- Laser-Matter Interactions and Applications
- Theoretical and Computational Physics
- Scientific Research and Discoveries
- Advanced Chemical Physics Studies
- Molecular spectroscopy and chirality
- Ecosystem dynamics and resilience
- Micro and Nano Robotics
- stochastic dynamics and bifurcation
Universidade Estadual de Campinas (UNICAMP)
2015-2024
American Institute for Economic Research
2024
Universidade Estadual Paulista (Unesp)
1992-2024
New England Complex Systems Institute
2005-2018
J. Craig Venter Institute
2010
Albert Einstein College of Medicine
2005
Massachusetts Institute of Technology
1988-2002
University of Bristol
1996
Universidade de São Paulo
1986-1987
Signals of Mosquito Speciation Malaria in Africa is transmitted by the mosquito species complex Anopheles gambiae . Neafsey et al. (p. 514 ) made high-resolution single-nucleotide arrays to map genetic divergence among members species. Differentiation between populations was observed and evidence obtained for selective sweeps within populations. Most occurred inversion regions around centrosome genes associated with development, pheromone signaling, from X chromosome. The analysis also...
Mutualistic networks are crucial to the maintenance of ecosystem services. Unfortunately, what we know about seed dispersal is based only on bird-fruit interactions. Therefore, aimed at filling part this gap by investigating bat-fruit networks. It known from population studies that: (i) some bat species depend more fruits than others, and (ii) that specialized frugivorous bats prefer particular plant genera. We tested whether those preferences affected structure robustness whole network...
We present a complete derivation of the semiclassical limit coherent state propagator in one dimension, starting from path integrals phase space. show that arbitrariness integral representation, which follows overcompleteness states, results many different limits. explicitly derive two possible formulae for propagator, we suggest third one, and discuss their relationships. also an initial value representation based on gaussian wavepacket. It turns out to be related to, but from, Heller's...
Social influence plays an important role in human behavior and decisions. Sources of can be divided as external, which are independent social context, or originating from peers, such family friends. An question is how to disentangle the contagion by peers external influences. While a variety experimental observational studies provided insight into this problem, identifying extent based on large-scale data with unknown network structure remains largely unexplored. By bridging gap between...
The end of the Pleistocene was marked by extinction almost all large land mammals worldwide except in Africa. Although debate on extinctions has focused roles climate change and humans, impact perturbations depends properties ecological communities, such as species composition organization interactions. Here, we combined palaeoecological data, food-web models community stability analysis to investigate if differences between modern mammalian assemblages help us understand why megafauna died...
Predicting panic is of critical importance in many areas human and animal behavior, notably the context economics. The recent financial crisis a case point. Panic may be due to specific external threat or self-generated nervousness. Here we show that economic earlier large single-day panics were preceded by extended periods high levels market mimicry—direct evidence uncertainty nervousness, comparatively weak influence news. High mimicry can quite general indicator potential for...
Swarmalators are phase oscillators that cluster in space, like fireflies flashing a swarm to attract mates. Interactions between particles, which tend synchronize their phases and align motion, decrease with the distance difference them, coupling spatial dynamics. In this work, we explore effects of inducing frustration on system swarmalators move one-dimensional ring. Our model is inspired by well-known Kuramoto-Sakaguchi equations. We find, numerically analytically, ordered disordered...
Predicting panic is of critical importance in many areas human and animal behavior, notably the context economics. The recent financial crisis a case point. Panic may be due to specific external threat, or self-generated nervousness. Here we show that economic earlier large single-day panics were preceded by extended periods high levels market mimicry - direct evidence uncertainty nervousness, comparatively weak influence news. High can quite general indicator potential for self-organized crises.
Neutral models, in which genetic change arises through random variation without fitness differences, have proven remarkably successful describing observed patterns of biodiversity, despite the manifest role selection evolution. Here we investigate effect barriers on biodiversity by simulating expansion a population around barrier to form ring species, two ends are reproductively isolated ongoing gene flow ring. We compare spatial and properties neutral agent-based model greenish warblers’...
Abstract Biodiversity loss is a hallmark of our times, but predicting its consequences challenging. Ecological interactions form complex networks with multiple direct and indirect paths through which the impacts an extinction may propagate. Here we show that accounting for these connecting species necessary to predict how extinctions affect integrity ecological networks. Using approach initially developed study information flow, estimate effects in plant–pollinator find even those several...
Abstract The complexity of an ecological community can be distilled into a network, where diverse interactions connect species in web dependencies. Species interact directly with each other and indirectly through environmental effects, however to our knowledge the role these ecosystem engineers has not been considered network models. Here we explore dynamics assembly, colonization extinction depends on constraints imposed by trophic, service, engineering We show that assembly model...
Similarly to sperm, where individuals self-organize in space while also striving for coherence their tail swinging, several natural and engineered systems exhibit the emergence of swarming synchronization. The arising interplay these phenomena have been captured by collectives hypothetical particles named swarmalators, each possessing a position phase whose dynamics are affected reciprocally space-phase states neighbors. In this work, we introduce solvable model swarmalators able move...
Swarmalators are oscillators that swarm through space as they synchronize in time. Introduced a few years ago to model many systems mix synchrony with self-assembly, remain poorly understood theoretically. Here, we obtain the first analytic results on swarmalators moving two spatial dimensions by introducing simplified where have no hard-shell interaction terms and move periodic plane. These simplifications allow expressions for order parameters, stabilities bifurcations be derived exactly.
Higher order interactions can lead to new equilibrium states and bifurcations in systems of coupled oscillators described by the Kuramoto model. However, even simplest case 3-body there are more than one possible functional forms, depending on how exactly bodies coupled. Which these forms is better suited describe dynamics depends specific system under consideration. Here we show that, for a particular class interactions, reduced equations parameter be derived arbitrarily many bodies....
The eigenvalues and eigenvectors of the connectivity matrix complex networks contain information about its topology collective behavior. In particular, spectral density $\rho(\lambda)$ this reveals important network characteristics: random follow Wigner's semicircular law whereas scale-free exhibit a triangular distribution. paper we show that hierarchical very different pattern, which can be used as fingerprint modularity. Of particular importance is value $\rho(0)$, related to homeostatic...