Emergence of chaotic attractor and anti-synchronization for two coupled monostable neurons

The dynamics of two coupled piece-wise linear one-dimensional monostable maps is investigated. The single map is associated with Poincare section of the FitzHugh-Nagumo neuron model. It is found that a diffusive coupling leads to the appearance of chaotic attractor. The attractor exists in an invariant region of phase space bounded by the manifolds of the saddle fixed point and the saddle periodic point. The oscillations from the chaotic attractor have a spike-burst shape with anti-phase synchronized spiking.Comment: To be published in CHAO

Christianity and Islam: Demography in the Middle East

At all four corners of the earth: the Balkans (Kosovo, Bosnia), Indonesia (Moluccas, East-Timor), Africa (Sudan), as well as the Holy Land (Nazareth), Islam and Christianity seem to be in a position of mutual rejection. Hence, the representation, which currently prevails over Europe, of a perpetual conflict. However, this vision maintained by events that indeed highlight religious conflicts, remains in a state of partiality and partialness. We thus see Islam reigning undivided over the societies south of the Mediterranean, all the while forgetting that in the Arab world as well as in Turkey, religious uniformity - currently the norm - does not date back to the beginning of time. Between the 7th century, which witnessed the warriors of Islam leaving Arabia, and the preceding century, the relationship between the two religions was not just conflictual. On more than one occasion and in more than one place Christianity would come to know unexpected recoveries

Fractalization of Torus Revisited as a Strange Nonchaotic Attractor

Fractalization of torus and its transition to chaos in a quasi-periodically forced logistic map is re-investigated in relation with a strange nonchaotic attractor, with the aid of functional equation for the invariant curve. Existence of fractal torus in an interval in parameter space is confirmed by the length and the number of extrema of the torus attractor, as well as the Fourier mode analysis. Mechanisms of the onset of fractal torus and the transition to chaos are studied in connection with the intermittency.Comment: Latex file ( figures will be sent electronically upon request):submitted to Phys.Rev. E (1996

The epidemiological transition in Antananarivo, Madagascar: an assessment based on death registers (1900–2012)

Background: Madagascar today has one of the highest life expectancies in sub-Saharan Africa, despite being among the poorest countries in the continent. There are relatively few detailed accounts of the epidemiological transition in this country due to the lack of a comprehensive death registration system at the national level. However, in Madagascar's capital city, death registration was established around the start of the 20th century and is now considered virtually complete. Objective: We provide an overview of trends in all-cause and cause-specific mortality in Antananarivo to document the timing and pace of the mortality decline and the changes in the cause-of-death structure. Design: Death registers covering the period 1976–2012 were digitized and the population at risk of dying was estimated from available censuses and surveys. Trends for the period 1900–1976 were partly reconstructed from published sources. Results: The crude death rate stagnated around 30‰ until the 1940s in Antananarivo. Mortality declined rapidly after the World War II and then resurged again in the 1980s as a result of the re-emergence of malaria and the collapse of Madagascar's economy. Over the past 30 years, impressive gains in life expectancy have been registered thanks to the unabated decline in child mortality, despite political instability, a lasting economic crisis and the persistence of high rates of chronic malnutrition. Progress in adult survival has been more modest because reductions in infectious diseases and diseases of the respiratory system have been partly offset by increases in cardiovascular diseases, neoplasms, and other diseases, particularly at age 50 years and over. Conclusions: The transition in Antananarivo has been protracted and largely dependent on anti-microbial and anti-parasitic medicine. The capital city now faces a double burden of communicable and non-communicable diseases. The ongoing registration of deaths in the capital generates a unique database to evaluate the performance of the health system and measure intervention impacts

Demographic change and conflict in Northern Ireland: reconciling qualitative and quantitative evidence

Recent large-N quantitative studies have failed to uncover a link between demographic change and conflict. This seems to refute quite powerful qualitative evidence from small-scale case studies that such a relationship exists. This article attempts to reconcile the conflicting evidence by revealing how population change—in this case a major decline in the size of the Protestant majority—matters for violent conflict, but not in a direct way. In addition, relationships differ by level of geography. In the case of Northern Ireland, no significant quantitative association exists between ethnic change and violence. This holds across both geographic units and years. However, there is a significant association between ethnic demography and Protestant mobilization into the Orange Order across counties. This in turn is related to Protestant resistance to reforms aimed at extending civil rights to the Catholic population during the Stormont period. This stance was a major factor in generating Catholic support for IRA violence. Moreover, in specific locations, a direct link between Protestant population decline relative to Catholics and loyalist violence against Catholics is evident. Hence demography matters, but in conjunction with other factors, and several steps upstream from the outbreak of violence

The Changing Waves of Migration from the Balkans to Turkey: A Historical Account

Ahmet İçduygu and Deniz Sert tell the history of migration from the Balkans to Turkey from the end of the nineteenth century to the present. They relate this history to nation-building, but also to economic conditions and specific Turkish concerns, such as the perceived need for immigration to compensate for a declining population at that time. They also demonstrate that after 1990, ethnic migration decreased and irregular labour migration became more important

Does demographic revolution lead to democratic revolution? The case of North Africa and the Middle East

Item does not contain fulltex

Le rendez-vous des civilisations

info:eu-repo/semantics/publishe