A density-matrix theory is employed to study dynamical effects in a THz quantum cascade laser. Varying the tunnel coupling across the injection barrier by changing the barrier width, different regimes are distinguished where stationary and dynamics-induced localization effects are found and discussed.

Alfonso Pecha (b. 1327, d. 1389), Bishop of Spanish Jaén from 1359 to 1368, went to Italy after his resignation. There he made St. Bridget’s acquaintance. Alfonso who was a man of great learning and wide experience became St. Bridget's trusted advisor and assisted her in propagating her great causes (the return of the papacy from Avignon to Rome, a reform of the Church, the founding of a new order

This paper suggests that many of Gurvitch's ideas, which were originally presented in an abstract fashion, are still highly pertinent to socio-legal analysis. They may be employed in empirical research in a revised form, which would make them receptive to operationalisation. To this end, I shall focus on some of the main theoretical ideas developed by Gurvitch, reinterpreting them critically and i

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The evaporative gas turbine pilot plant (EvGT) has been in operation at Lund Institute of Technology in Sweden since 1997. This article presents the latest development in the evaporative technology, the evaporation of bio-ethanol in a gas turbine power plant as a means to reduce the emission of greenhouse gases. Bio-ethanol is produced from a feedstock consisting of corn-stover, and the bio-ethano

Popular Abstract in Swedish Färsk morotsjuice har ett högre förädlingsvärde än råa morötter. Färsk morotsjuice har en kort hållbarhet på cirka tre dagar vilket försvårar centraliserad industriell storproduktion. Olika processteg vid tillverkningen av morotsjuice påverkar såväl hållbarhet som näringsinnehåll och utseende. Syftet med detta arbete var att undersöka och karakterisera effekter av olikaCarrots are a cold-weather crop well suited for cultivation in the south of Sweden. Carrots are generally rather inexpensive, with a market price below € 1 /kg (Sweden, 2003), whereas fresh carrot juice has a price of around € 5 /kg. The fresh carrot juice produced today has a short shelf-life of approximately three days, which makes centralised industrial production and distribution difficult, an

An explorative interview study was performed with 21 air traffic controllers having experienced air traffic control incidents (loss of separation between aircraft). The results of the interview study identified the following main factors contributing to the occurrence of incidents: 1) memory malfunctions; 2) concentration problems; 3) distractions; 4) inadequate expectations; 5) deficient phraseol