Ultra-short X-ray pulses are generated by focusing 150 fs laser pulses with an energy of 200 mJ onto metal targets. Focal intensities are expected to reach 1018 WI cm2• An efficient X-ray source has been developed. This X-ray source has been characterised, with an emphasis on photon energies above 10 keV. Measurements of the spectral distribution of X-rays, the overall X-ray yield and the spatial

The subject of the thesis is intericonicity, i.e. the relations between iconic signs. Hypothetically we only have a tacit knowledge of interikonicity, and the aim of the thesis is to establish a theory about it, grounded in hermeneutics and semiotics. According to this Theory of Intericonicity all representations, all iconic signs, are fascinated, rhetorical transformations of models. Paraphrase a

The number of weblogs has increased exponentially since several weblog service providers released free and easy-to-use software in late 1999. This enabled people with a computer, Internet access and a desire to present themselves and their daily lives, and/or their political views, tech news, knitting projects for a possible audience to create and keep a blog. Yet, why do people read blogs, and wh

Popular Abstract in Swedish Ljusspridning och absorption i biologisk vävnad - modeller och mätningar Visionerna är stora i medicingruppen på avdelningen för atomfysik, LTH, nämligen att utveckla nya metoder för förfinad diagnostik och selektiv behandling av cancer, hjärt- och kärlsjukdomar med hjälp av laserljus. Möjligheten till att med ljus detektera och karakterisera sjuk vävnad, exempelvis tIn this work a number of theoretical models, describing light propagation in matter, have been applied to and developed for the examination of tissue. The aim was to model the light scattering and absorption in tissue in order to improve the understanding of underlying mechanisms of laser-based diagnostics and treatment modalities utilised for cancer and cardiovascular diseases. The models studied

Controlling an induction machine has been a difficult task since its invention, especially at low speed operation and during highly dynamic regimes, where the required torque/speed changes constantly. This paper aims to present the validation and implementation of a deadbeat direct torque and flux control scheme (DB-DTFC) for induction machines on a multilevel platform consisting on an FPGA, a rea

The electron transport chain in mitochondria of different organisms contains a mixture of common and specialised components. The specialised enzymes form branches to the universal electron path, especially at the level of ubiquinone, and allow the chain to adjust to different cellular and metabolic requirements. In plants, specialised components have been known for a long time. However, recently,

Popular Abstract in Swedish Nanotrådar har potential att bli en mycket flexibel plattform för design av halvledarkomponenter. I nanotrådar är det möjligt att bilda kristallstrukturer som normalt sett inte förekommer i bulkmaterial, och att kombinera olika III-V och grupp IV material i axiella eller radiella heterostrukturer. Eftersom så pass komplicerade strukturer kan skapas, både avsiktligt och Nanowires have the potential to be a very flexible platform for the design of semiconductor devices. In nanowires it is possible to form crystal structures not found in the bulk materials under normal conditions, and to combine different III-V and group IV materials into axial or radial heterostructures. As quite complex structures can be formed, both intentionally and unintentionally, characteriz

The chapter gives a survey of familyrelated topics (betrothal, marriage, property devolution, childrearing) in medieval Sweden.

The introduction of guard channels in a cellular network is a method for giving priority to on-going calls by having channels exclusively reserved for handover purposes. Herein, an adaptive measurement-based dynamic guard channel scheme is introduced. The proposed scheme uses the number of on-going calls in adjacent cells and measurements of handover probabilities to determine the amount of guard

Energy efficiency in industry has been a priority in Chinese policy and planning for more than twenty years. Great achievements in this area have been made. Still, in many cases a considerable potential for improved industrial energy efficiency remains, not least in terms of enhancement of technical capacity. Cement production is one sector where this is evident. Policies have been devised to addr