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Elemental biological imaging by differential absorption with a laser-produced x-ray source

We demonstrate the novel application of hard x rays emitted by a laser-produced plasma for differential imaging of elements. An x-ray-emitting laser-produced plasma, obtained by the focusing of radiation from a 10-Hz terawatt laser, is used for biological imaging. The x-ray source can be arranged to yield characteristic x-ray emission lines with photon energies that bridge the K absorption edge of

Images and Strategies for Autonomy. Explaining Swedish Security Policy Strategies in the 19th Century

How do small states approach their security problems? What types of strategic instruments exist for small states, and when and why are certain strategies chosen rather than others? The security of `weak' states is problematic, demanding trade-offs in the decisions made. Using 19th century Swedish security policy as an example, it is argued here that small states, in their pursuit of security and a

Östergatan Preurbana aktiviteter, gatukonstruktioner, bod- och kvartersbebyggelse

Med anledning av att VA-verket i Malmö planerade att lägga om och förnya vatten-ledningsnätet i Östergatan och S:t Gertrudsgatan genomfördes en förundersökning i form av schaktningsövervakning. Övervakningen utfördes av personal från Malmö Kulturmiljö. Exploateringsområdet berörde Malmö äldre stadsområde (RAÄ 20). Östergatan var under medeltiden en del av stadens huvudstråk och benämndes tidigt s

Intertext

Discussion of the terms "intertext" and "intertextuality" with primary focus on film studies.

Photoionization-pumped gain at 185 nm in a laser-ablated indium plasma

We reportwhat is to our knowledge the first production of gain by inner-shell photoionization of ions. Photoionization of 4d electrons from In$+$ ions created a population inversion on a 185-nm In2$+$ transition. This scheme is an isoelectronic scaling of the 442-nm Cd$+$ laser. A single-pass gain constant of 0.9 {\textpm} 0.3 cm{\textminus}1 over a 0.4-cm path was pumped by soft x rays generated

Transient waves in nonstationary media : with applications to lightning and nonlinear media

Popular Abstract in Swedish Avhandlingen behandlar problem inom den tillämpade matematiken med speciell inriktning mot elektromagnetisk vågutbredning. Exempel på studerade elektromagnetiska vågor är radiovågor, mikrovågor och ljus. Det speciella som skiljer den här studien från andra liknande studier, är att det medium som vågen passerar genom är ickestationärt, vilket innebär att det ändras underPropagation of transient waves in nonstationary, inhomogeneous, dispersive, stratified media is considered. Waves originating from sources exterior to the scatterer as well as from internal sources are treated. Algorithms are developed and illustrated by computations of wave phenomena in stationary, nonstationary and weakly nonlinear media. In the theoretical part, the underlying hyperbolic equati

Power generation from low heat sources

In this chapter a thorough review of the latest research findings on power generation from non-conventional low heat sources is presented. Main discoveries and results of research works ranging from source exploitation technologies to final power production are reported and discussed to offer an overview of their potential. Firstly the concept of low-grade source is presented and the main energy s

In-cylinder Surface Thermometry using Laser Induced Phosphorescence

Surface temperature in internal combustion engines is of high interest when studying heat losses. Two approaches for retrieving the surface temperatures are thermocouples and Laser Induced Phosphorescence, LIP. This study aims to analyze LIP as a technique for measuring surface temperature in internal combustion engines. The motivation for this study is the need for accurate surface temperatures w

A genetic component to resistance to fungal infection in frog embryos

The embryo has traditionally been considered to completely rely upon parental strategies to prevent threats to survival posed by predators and pathogens, such as fungi. However, recent evidence suggests that embryos may have hitherto neglected abilities to counter pathogens. Using artificial fertilization, we show that among-family variation in the number of Saprolegnia-infected eggs and embryos i