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Centralized Petersen coil earthing in networks with extensive use of underground cable involves flow of large quantities of reactive earth fault current. In networks with long radial cable feeders this creates problems involving active losses and active and reactive earth fault current. One possible solution to the problem is the use of local compensation. This paper aims at understanding the limi

Many politicians and researchers perceive wind power as an important part of future energy supply, nationally and globally. However, it has turned out to be problematic to expand wind power in the pace necessary to meet the national and international goals about wind power expansion. A significant challenge concerns the social and policy-related processes surrounding the establishment of wind powe

The Virgin Mary has always stood out in the Christian scenery, yet in ever-changing guises. This study explores the characterization of the Virgin in the poetic works of Romanos the Melodist (ca. 490–560), the great composer of the so-called kontakion. Written for liturgical use, these dramatic songs soon became well-known and immensely popular. The most famous ones reveal a remarkable interest in

The performance of an iris recognition system depends greatly on how well the iris segmentation part of the system performs its task. The performance of an iris segmenta- tion algorithm can be evaluated using different criteria and methods. Some of the methods evaluate the performance of the segmentation algorithm based on the performance of the whole iris recognition system. Other methods evaluat

A stability criterion for nonlinear systems, derived by the first author (2000), can be viewed as a dual to Lyapunov's second theorem. The criterion is stated in terms of a function which can be interpreted as the stationary density of a substance that is generated all over the state space and flows along the system trajectories towards the equilibrium. The new criterion has a remarkable convexity

Au nanoparticles and Au films for growth of nanowires on the GaAs(111)B surface have been studied by a combination of experimental and theoretical techniques. If Au is present in either form, annealing to temperatures relevant for nanowire growth results in the formation of a thin Au wetting layer. Based on density functional theory calculations and experimental data, a structural model is propose

Popular Abstract in Swedish Presenterar resultat inom algoritmer och datastrukturer för att hantera sekventiella data (strängar), med användningar bland annat inom datakomprimering. Särskilt behandlas varianter av suffixträd och näraliggande ämnen, som sortering av suffix. Vad gäller komprimering behandlas modellering av källor med hjälp av både strängbaserade metoder (t.ex. Ziv-Lempel) och probabThis doctoral dissertation presents a range of results concerning efficient algorithms and data structures for string processing, including several schemes contributing to sequential data compression. It comprises both theoretic results and practical implementations. We study the suffix tree data structure, presenting an efficient representation and several generalizations. This includes augmenti

A proposal for a new synchrotron light source, MAX 4, is presented. The main components are two identical storage rings operated at different electron beam energies and equipped with superconducting insertion devices. Small beam emittances will yield high brilliance radiation over a wide spectral range. A small horizontal emittance is achieved by using a large number of cells with gradient dipoles

The historical role of European farming in southern and central Africa is a delicate matter that has received a great deal of attention among scholars over the years. Going through this vast literature a striking consensus emerges: success or failure of European farming in southern Africa was to a large extent depending on their access and control over labour. These propositions have so far never

Popular Abstract in Swedish Arbetet i denna avhandling presenteras i 6 olika delarbeten (artiklar I-VI). Artiklarna I-III behandlar två olika enzymer som bryter ner cyklodextriner, vilka är ringformade molekyler med samma beståndsdelar som i stärkelse (dvs sammanlänkade glukosmolekyler). Dessa s.k. cyklodextrinaser kommer ursprungligen från två bakterier som har isolerats i varma källor på Island.Two putative cyclodextrinases (CDases) were amplified from two moderate thermophiles isolated in Iceland: Anoxybacillus flavithermus and Laceyella sacchari. They were cloned, expressed and characterized. The expression of the former was optimized in E. coli by using a solubility-enhancing tag, NusA, and tuning of inducer concentration in the expression strain Tuner(DE3). The CDases were optimally

Analysis of the debates in the Swedish press concerning the controversies around the open-air art exhibition "Sculptura-97" in Falkenberg.

Statsvetenskaplig forskning visar att demokratiska dygder, som delaktighet, kritiskt tänkande och solidaritet värderas högt av svenska medborgar. Medborgarna anser att de själva kommer ganska nära sitt ideal när det gäller att bete sig i enlighet med dygderna. Man tycker alltså att man själv ”lever som man lär”. Däremot anser de inte att andra människor lever upp till de demokratiska idealen lika

Kritisk diskussion kring det samtida svenska och skandinaviska filmproduktionslandskapet.