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

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 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

Description of the paper – e.g. topic, research question, objective, purpose, value, conceptual or theoretical framework, state of the art: Adult learning is a subject of ever growing interest, as the population of persons 65 and older grows in industrialised countries. By 2010 the number of retired persons in the European Union will be almost twice as large as in 1995 (Ilmarinen & Costa, 2000

Hydrogen in excess of solid solubility precipitates as hydride phase of plate shaped morphology in hcp α-Zr with the broad face of the hydride plate coinciding with certain crystallographic plane of α-Zr crystal called habit plane. The objective of the present investigation is to predict the habit plane of δ-hydride precipitating in α-Zr at 298 K using strain energy minimization technique. The δ-h

The Lewis (Le) blood group antigens are a set of fucosylated glycan structures. They are present as N- and O-linked structures on glycoproteins and as glycolipid-based structures on cell surfaces. Depending on the exact structure, the Lewis group is divided into four subgroups; Lea, Leb, Lex and Ley. Lex and Lea can further be sialylated and/or sulfonated. Among these, Lex has been found to be imp

När vi talar om framsteg, tänker vi inte bara på teknik och ökad kunskap. Vi tror att kunskapen automatiskt leder till en bättre framtid. Och visst har tankens frihet givit oss makt. Men vi är inte så fria som vi tror.