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This paper presents a new fast approach to improving stability in polynomial equation solving. Gröbner basis techniques for equation solving have been applied successfully to several geometric computer vision problems. However, in many cases these methods are plagued by numerical problems. An interesting approach to stabilising the computations is to study basis selection for the quotient space C[

Structural, elastic and electronic properties of zircon-type and scheelite-type EuVO4 are investigated experimentally, by in-situ X-ray diffraction using synchrotron radiation, and theoretically within the framework of the density functional theory (DFT) and using the PBE prescription of the exchange-correlation energy. This study was motivated by the fact that the previous knowledge of the equati

Background: When scaling up lignocellulose-based ethanol production, the desire to increase the final ethanol titer after fermentation can introduce problems. A high concentration of water-insoluble solids (WIS) is needed in the enzymatic hydrolysis step, resulting in increased viscosity, which can cause mass and heat transfer problems because of poor mixing of the material. In the present study,

Background: Family size and birth order are known to influence the risk of some cancers. However, it is still unknown whether these effects change from early to later adulthood. We used the data of the Swedish Family Cancer Database to further analyze these effects. Methods: We selected over 5.7 million offspring with identified parents but no parental cancer. We estimated the effect of birth orde

Humans have more than doubled the amount of reactive nitrogen (Nr) added to the biosphere, yet most of what is known about its accumulation and ecological effects is derived from studies of heavily populated regions. Nitrogen (N) stable isotope ratios (N-15:N-14) in dated sediments from 25 remote Northern Hemisphere lakes show a coherent signal of an isotopically distinct source of N to ecosystems

So far, 112 polymerid trilobite species/subspecies and 13 agnostoid species/subspecies have been recorded from the Furongian (upper Cambrian) of Scandinavia. For the first time, their zonal occurrences are summarized in a biostratigraphical scheme serving as a practical synopsis for students of this interval in time. Ninety-six of the recorded polymerid trilobite species/subspecies belong to the f

Northern peatlands hold large amounts of organic carbon (C) in their soils and are as such important in a climate change context. Blanket bogs, i.e. nutrient-poor peatlands restricted to maritime climates, may be extra vulnerable to global warming since they require a positive water balance to sustain their moss dominated vegetation and C sink functioning. This study presents a 4.5 year record of

Substantial research and development efforts are being made to add driver support systems to the arsenal of traffic safety measures. Obviously, the system cannot reduce fatalities and trauma until it is actually used. Hence, drivers’ experiences and acceptance of the system are of paramount importance. A driver support system (ISA) has been investigated by means of real life trials in Sweden, Hung

In this paper, it is shown that stacking dielectric sheets above planar self-complementary antenna elements can reduce the degrading effect of the ground plane and hence be used to design ultra-wideband antennas

Popular Abstract in Swedish En central fråga av både teoretisk och praktisk betydelse är varför vissa företag är mer framgångsrika - vilket ofta uttrycks som att de har större konkurrensfördelar - än andra. Speciellt uppkommer frågan då vissa fabriker inom samma företag år efter år uppvisar ett bättre ekonomiskt resultat än andra. Fokus i denna avhandling är att förstå varför så sker inom ett utvaThe most central question in the strategic management literature is why some firms are more successful than others, often expressed as an aim to understand sources of competitive advantage. In this thesis, an empirical observation is made that a number of manufacturing plants belonging to the same firm show sustainable differences in financial success, and the question is why. The main theoretical

Rigid or conformationally restricted compounds are intresting from a pharmacological point of view since they do not have to pay the entropy penalty paid by more flexible molecules in binding to e.g. a protein. In this thesis, synthetic transformations of a rigid tetracyclic oxanorbornene scaffold are described, yielding novel compounds with low molecular weight, rigid framework and high oxygen co

In spite of the growing importance of planned,centrally managed and enclosed shopping centres in the retailing sector,the understanding concerning sources and outcomes of customer satisfaction with this kind of shopping malls is limited.This paper develops and vali- dates a conceptualisation of shopping mall satisfaction based on ?eld studies in Sweden.The results show that eight underlying factor

Even if outsourcing is a well-researched phenomenon, it can be stated that evaluation studies on IS outsourcing relationships are scarce. From a description of two IS outsourcing relationship cases, a set of les-sons learned are presented. A boundary spanning perspective is then used when evaluating these lessons learned in the client-supplier outsourcing relationships and thereby adding a “new” t

“Diversify or die” is a recurring and rather dramatic call for organizations to recruit, retain and manage a demographically diverse workforce, advocated by the business case for diversity, also known as diversity management philosophy. Diversity management places diverse social identities at the heart of organizational success and has gained much attention from management consultants and managers