Search results

Filter

Filetype

Your search for "*" yielded 528442 hits

Within-host speciation of malaria parasites

Background Sympatric speciation—the divergence of populations into new species in absence of geographic barriers to hybridization—is the most debated mode of diversification of life forms. Parasitic organisms are prominent models for sympatric speciation, because they may colonise new hosts within the same geographic area and diverge through host specialization. However, it has been argued that th

A cognitive approach to reference

When we talk about something, we need to indicate what we talk about. Sometimes we can use pointing gestures but mainly we have to rely on words. A pointing gesture can direct attention in perceived space, but how do we direct attention with words? What can we do with speech sounds we hear, to find out what somebody wants to tell us about something and what that something is? Questions about refer

On the electromagnetic instantaneous response

The instantaneous response models the rapid part of the interaction between electromagnetic fields and materials. From a physical point of view the instantaneous response is non-observable and from a mathematical point of view it constitutes the principal part of the Maxwell equations. In this paper, it is shown that the instantaneous response is not uniquely determined from a given set of values o

Characterisation of monoenergetic electron beams produced at the Lund Laser Centre

Experiments performed with the high contrast 0.7 J, 35 fs Ti:Sapphire laser at the Lund Laser Centre focused into a supersonic helium gas jet have demonstrated the production of quasi-monoenergetic electron beams with energies up to 150 MeV. The beam is a result of controlled wavebreaking of a wakefield generated by the relativistically channeled laser beam. Under the best conditions of laser ener

Informal investors and value added: What do we know and where do we go?

Informal investors have been highlighted as important stakeholders for potential high-growth ventures. Extant empirical research provides evidence that they contribute not only with money but also bring added value in terms of providing their skills and experience to support the continued development and growth of the ventures in which they have invested. However, despite the reported benefits of