Basin entropy behavior in a cyclic model of the rock-paper-scissors type

We deal with stochastic network simulations in a model with three distinct species that compete under cyclic rules which are similar to the rules of the popular rock-paper-scissors game. We investigate the Hamming distance density and then the basin entropy behavior, running the simulations for some typical values of the parameters mobility, predation and reproduction and for very long time evolutions. The results show that the basin entropy is another interesting tool of current interest to investigate chaotic features of the network simulations that are usually considered to describe aspects of biodiversity in the cyclic three-species model.Comment: 7 pages, 7 figures, 2 tables. To appear in EP

Recurrence-based analysis of barrier breakup in the standard nontwist map

We wish to acknowledge the support: CNPq, CAPES, and FAPESP.Peer reviewedPublisher PD

Delayed feedback control of phase synchronisation in a neuronal network model

The human cerebral cortex can be separated into cortical areas forming a clustered network structure. We build two different clustered networks, where one network is based on a healthy brain and the other according to a brain affected by a neurodegenerative process. Each cortical area has a subnetwork with small-world properties. We verify that both networks exhibit rich-club organisation and phase synchronisation. Due to the fact that neuronal synchronisation can be related to brain diseases, we consider the delayed feedback control as a method to suppress synchronous behaviours. In this work, it is presented that depending on the feedback parameters, intensity and time delay, phase synchronisation in both networks can be suppressed. Therefore, one of our main results is to show that delayed feedback control can be used to suppress undesired synchronous behaviours not only in the healthy brain, but also in the brain marked by neurodegenerative processes

Brazilian scientific production on pharmaceutical care from 1990 to 2009

Brazilian scientific production on pharmaceutical care was identified based on articles indexed on the Medline, Embase, Lilacs, Web of Science and International Pharmaceutical Abstracts databases. Sixty-three articles published in both national and international journals were retrieved. With regard to authors, 72.3% were from the Southeast and South Regions, and 60.8% were affiliated to public universities. In relation to the type of studies, 85.7% were descriptive, and the most frequently researched fields were community pharmacies, hospitals and primary health care units. Articles were original in 65.1% of cases, updates in 20.6%, and reviews in 7.9%. An increase in publications commenced in 2006. In 31.7% of cases, authors had adopted a bibliographical study design, 28.6% qualitative study, 23.8% intervention, and 15.9% observational study design. The most researched subjects were elderly with chronic diseases. The importance of stimulating the conducting of experimental and qualitative studies, as well as amplifying authorship affiliated with the service area, foreign authors and with research in a wide variety of practice settings were highlighted. Despite the limited quantity of articles, an increase in their number as well as in their scope and quality is expected, so as to create further knowledge that contributes to the recognition of pharmacists' actions by patient healthcare teams.<br>Identificam-se características da produção científica brasileira sobre atenção farmacêutica, a partir de artigos indexados nas bases Medline, Embase, Lilacs, Web of Science e International Pharmaceutical Abstracts. Foram localizados 63 artigos em revistas nacionais e internacionais. Em relação aos autores, 72,3% pertenciam as Regiões Sudeste e Sul e 60,8% estavam vinculados a universidades públicas. Quanto ao tipo de pesquisa, 85,7% foram descritivas, sendo campos mais pesquisados: farmácias comunitárias, hospitais e unidades básicas de saúde. Os artigos foram considerados originais (65,1%), atualizações (20,6%) e revisões (7,9%). O aumento das publicações se deu a partir de 2006. Em 31,7% dos casos os autores optaram por estudo bibliográfico, 28,6% qualitativo, 23,8% de intervenção e 15,9% observacional. Os principais sujeitos pesquisados foram idosos com enfermidades crônicas. Aponta-se a importância de estimular a realização de estudos experimentais e qualitativos, ampliar a autoria vinculada à área de serviços, o vínculo com autores estrangeiros e a pesquisa em todos os ambientes de prática. Apesar da quantidade limitada de artigos espera-se aumento de seu número, abrangência e qualidade de forma a gerar conhecimento que contribua para o reconhecimento das ações do farmacêutico na equipe de atenção ao paciente