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Efficient Pruning of Search Trees in LQR Control of Switched Linear Systems

This paper considers off-line optimization of a switching sequence fora given finite set of linear control systems and joint optimization ofcontrol laws. A linear quadratic full information criterion isoptimized and dynamic programming is used to find the optimalswitching sequence and control laws. The main result is a method for efficient pruning of the search tree to avoid combinatoric explosion

Small biotopes: Landscape and management effects on pollinators

Popular Abstract in Swedish Vårt behov av att öka matproduktionen för en växande global befolkning, har sedan mitten av nittonhundratalet drivit jordbrukets utveckling. Det traditionella, småskaliga jordbrukslandskapet med sitt lapptäcke av betesmarker, ängar och åkrar, har över tid ersatts av ett mer produktionsinriktat landskap. Åkrar har slagits ihop för att skapa större odlingsenheter, där nyaThe intensification of agriculture during the second half of the twentieth century, has caused sever declines of farmland biodiversity, where loss of semi-natural habitats is one of the major drivers. To halt further loss of habitat and biodiversity, agri-environmental schemes (AES) are used to compensate farmers to use methods less harmful to the environment. In this thesis, I have investigated t

pH-dependent oxidation of Cytochrome b559 is different in the different S-states

We have studied the state of Cyt b559 and the Mn cluster by EPR and optical spectroscopy in the different S-states between pH 4.0-10.0. In these experiments, the pH was changed after the OEC turnover to the appropriate S-state (at pH 6.0) by 0-3 saturating flashes. Furthermore, the state of Cyt b559 after a subsequent flash given after the pH modification was also investigated. The results show th

Tyrannical Consumers - Initiate Value Creation in the Food Value Chain

The modern consumers live in a transparent world with unlimited information and consumers adopt information strategies around who they trust and this is based on their values and experiences of food. Consumer question the information provided by the authorities and seek other sources of information such as the Internet and fellow consumers. There is a need for this consumer perspective in value ch

Functional Proteome analysis of the molecular mechanism of (myo)fibroblast differentiation

Popular Abstract in Swedish Vävnadsförändringar förekommer i många normala tillstånd, antingen gradvis som i åldrande eller mer drastiskt vid till exempel sårläkning, fosterutveckling och förlossning. Dessa vävnadsförändringar är viktiga, men det finns tillfällen då vävnadsförändringar är assoscierade med sjukdomar. Exempel på sådana sjukdomar är utvecklandet av cancer eller fibrotiska tillstånd sTissue remodeling is observed in several physiological conditions such as embryogenesis, senescence, wound healing and pregnancy, as well as in several pathological conditions such as fibrosis and tumorgenesis. Fibroblasts play a key role in this tissue remodeling due to their capability of altering the turnover of the extracellular matrix. During the remodeling process, the fibroblasts are believ

Progression and Regression. Aspects of Advanced Swedish Students' Competence in English Grammar

This thesis investigates advanced Swedish students’ development of three grammatical phenomena: subject-verb concord, prepositions and article use in compositions and translations. In order to describe the students’ development of these categories, actual errors are related to potential errors forming so called ‘error scores’. When the error score for the first test opportunity is compared with th

Degree-of-freedom evaluation of six-port antenna arrays in a rich scattering environment

It has been proposed that six co-located antennas, namely three electric and three magnetic dipoles, can offer up to a six-fold capacity increase in wireless channels, relative to that of single antennas. In other words, six degrees of freedom (DOFs) can be supported by co-located six-port transmit and receive antenna arrays. However, due to the complexity in designing and measuring such a six-por