Popular Abstract in Swedish För många cancerpatienter är strålbehandling ett viktigt behandlingsalternativ. En framgångsrik behandling kräver att den absorberade dosen till patienten kan ges med stor noggrannhet. Detta eftersom en liten avvikelse i absorberad dos kan påverka behandlingens resultat. Strålbehandling sker idag med avancerad teknik och utrustning där osäkerheterna i varje led i behandThis thesis presents a new verification concept, the virtual accelerator, for dose calculation algorithms used in treatment planning systems (TPSs) for external beam radiotherapy. The algorithm input data required to implement a treatment unit in the TPS are generated by Monte Carlo simulations as are the beam reference data needed for the subsequent evaluation of the dose calculation algorithm. T

A growing body of research suggests that a firm’s governance system can significantly impact the long-term value creative potential of an enterprise by disciplining and encouraging organizational efforts to pursue risky entrepreneurial projects. Following this stream of research, we present a study of the impact of ownership and board governance on entrepreneurship in small technology-based firms.

Popular Abstract in Swedish Den viktigaste funktionen för kroppens immunförsvar är att försvara oss mot främmande ämnen, t.ex. bakterier eller virus. Detta försvar är väldigt kraftfullt och interaktioner mellan ett par molekyler kan snabbt komma att omfatta miljontals molekyler och celler. En urspårad inflammatorisk process kan mycket snabbt komma att förstöra kroppens egen vävnad och därför finnsGoodpasture disease is a prototype autoimmune disease that is characterized by a rapidly progressive glomerulonephritis, with or without lung haemorrhage, associated with autoantibodies against the glomerular basement membrane. The major antigen has previously been shown to be the non-collagenous domain of the a3 chain of type IV collagen, one of the six known a chains of type IV collagen. On aver

Renal osteodystrophy alters metabolic activity and remodeling rate of bone and also may lead to different bone composition. The objective of this study was to characterize the composition of bone in high‐turnover renal osteodystrophy patients by means of Fourier transform infrared spectroscopic imaging (FTIRI). Iliac crest biopsies from healthy bone (n = 11) and patients with renal osteodystrophy

RFID (radio frequency identification) technology is developing at a rapid pace. During the last few years, it has been widely discussed in logistics research, as well as in other scientific fields which also approach and contribute to the development of RFID technology. In both logistics and related fields there are findings regarding RFID technology which influence logistics. However, an overall

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The colors and contrasts of the nocturnal world are just as rich as those found in the diurnal world. This chapter describes a recent biomimetic advance inspired by the visual systems of nocturnal insects. Since the underlying principles of both animal and camera vision are similar, it is natural to try to mimic the neural processes of nocturnal animals in order to construct efficient computer vis

Popular Abstract in Swedish Något som kan låta motsägelsefullt är att en stjärna fungerar som en svartkropp. Med svartkropp menas ett objekt, vilkens energiförlust i form av elektromagnetisk strålning bestäms av föremålets temperatur och storlek. Våglängderna på strålningen som lämnar ett objekt bestäms däremot endast av temperaturen. En snöboll med temperaturen -10 C strålar 271 W m$^{-2}$ medanThe spectra of symbiotic stars are shown to frequently contain numerous fluorescence lines caused by Photo-excitation by Accidental Resonance (PAR). So far, most work involving fluorescence in stellar spectra has been assigned to the search of new PAR mechanisms, which can explain the presence of certain emission lines. This is taken a step further as the PAR pumped emission lines are analyzed to

Popular Abstract in Swedish Den brittiske filmkritikern Robin Wood började publicera essäer om film 1960. Sedan dess har han ensam eller tillsammans med andra givit ut tretton böcker. Vid sidan av dessa har han skrivit flera hundra essäer samt medverkat i mängder med antologier och uppslagsverk. Speciellt betydelsefull har Wood varit för Alfred Hitchcocks status som den förmodligen mest omskrivne British film critic Robin Wood began to publish on film in 1960. Since then, he has written or co-written 13 books, and also published hundreds of essays and articles in books, in journals, and in different encyclopedias. At the same time, Wood has been a key figure in the development of what has become academic film studies. Wood was educated at Cambridge University, where he studied English lite

A permutor (interleaver) design method was proposed to show the existence of turbo codes with minimum distance growing logarithmically with the permutor length. It was found that the minimum distance of a turbo code depended on the structure of the permutor or on its life cycle structures. It was demonstrated that the method could be used for the construction of turbo codes with practical blocklen