Forerunners (precursors) in linear, temporally dispersive, bi-gyrotropic materials are investigated using time-domain techniques. Bi-gyrotropic materials are characterized by twelve constitutive parameters (integral kernels). Specifically, the four susceptibility dyadics are all gyrotropic with a common gyrotropic axis. Pulse propagation along this axis is analyzed using dispersive (noncoupling) w

This thesis describes experimental studies of laser-driven particle acceleration. With the focused intensity of today’s high-power lasers exceeding 10^18 W/cm2,extremely high-gradient accelerators are possible. A number of experiments have been performed using two different laser systems, the Lund multi-TW laser and the Vulcan laser at CLF/RAL, UK, to study aspects ranging from laser system optimi

Metamaterial applications such as cloaking, perfect lenses, and artificial permeability are restricted by the frequency dependence of the permittivity, permeability, and index of refraction. Here, causality and passivity together with integral identities for Herglotz functions are used to construct sum rules. The sum rules relate the frequency dependence of the material parameters with their high-

A model to incorporate for aerodynamic 3-way (indirect) coupling between mono dispersed particles is proposed. The model is applied on particle laden jet flow and the results are compared with 2-way coupling. The particle drag coefficients are corrected based on the relative position of the particles. The correction factor is obtained from the pre-computed lookup tables. The particles are tracke

As a scholar of science and technology studies (a social science field that aims to understand the social processes of knowledge production), I focused the 4 years of my Ph.D. on studying how the academic landscape in which today’s postdoctoral life scientists develop their careers influences their working practices. Some of my results paint quite a grim picture of academic careers, baring the pro

The ethanol yield and productivity obtained during fermentation of lignocellulosic hydrolysates is decreased due to the presence of inhibiting compounds, such as weak acids, furans and phenolic compounds produced during hydrolysis. Evaluation of the effect of various biological, physical and chemical detoxification treatments by fermentation assays using Saccharomyces cerevisiae was used to charac

Popular Abstract in Swedish Experimentella data från kollisioner mellan guldjoner vid hög energi har analyserat inom ramen för experimentet PHENIX, som finns vid en av kollisionspunkterna vid ''the Relativistic Heavy-Ion Collider'' på ''Brookhaven National Laboratory'', New York (USA). Kollisioner med tunga joner, så som guld, används i försök till att återskapa de förhållanden som fanns i univerThe properties of the basic building blocks of nuclear matter, the quarks, and their interactions are not known in detail, largely because observations are complicated by the confinement of quarks in composite particles. New insights can be gained from the study of nuclear matter in a deconfined phase, like the form of matter that the Universe consited of early in its evolution according to the Bi

Our present understanding of the terminating bands in the I=40-50 spin range of 157,158Er is reviewed briefly. It is only recently that it has been possible to study states at higher spin in these nuclei, beyond band termination. Firstly, a large number of weak high-energy transitions feeding the terminating states were observed. Secondly, some collective structures that extended discrete spect