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We performed a case-control study to investigate the role of recent infection as stroke risk factor and to identify pathogenetic pathways linking infection and stroke. We examined 166 consecutive patients with acute cerebrovascular ischemia and 166 patients hospitalized for nonvascular and noninflammatory neurologic diseases. Control subjects were… (More)
The question how social norms can emerge from microscopic interactions between individuals is a key problem in social sciences to explain collective behavior. In this paper we propose an agent-based model to show that randomly distributed social behavior by way of local interaction converges to a state with a multimodal distribution of behavior. This can be… (More)
It is well accepted that future economic output in most industrialized countries must be achieved by a smaller and older labor force. A key question is how this development might affect labor productivity as measured by output per worker. 1 In the view of many economists, an aging population has negative consequences for growth in output per capita for two… (More)
To build an agent-based computational model of a specific socio-environmental system requires that answers be found to several important questions including: what social actors and contextual entities are to be modelled as software agents? With what mental functions must these software agents be equipped? What standard design or designs should be used to… (More)
The population in developed countries is rapidly aging, which explains why demography-the scientific study of human population dynamics-has become such a hot topic for science and the mass media. Technical progress with respect to computing power has helped alleviate population research-in fact, most contemporary research wouldn't have been possible without… (More)