We consider the problem of seeking the maximum of a scalar signal using a swarm of autonomous vehicles equipped with sensors that can take point measurements of the signal. Vehicles are not able to measure their current position or to communicate with each other. Our approach induces the vehicles to perform a biased random walk inspired by bacterial chemotaxis and controlled by a stochastic hybrid

Bigeye tuna (Thunnus obesus) have distinctive depth distributions and vertical movement patterns. They remain in the uniformed temperature surface layer at night and can descend to greater than 500 m depth at dawn. They thus mirror the vertical migrations of the small nektonic organisms of the deep sound scattering layer and extensively exploit these as a food resource. At their maximum depths, bi

Sales of Fairtrade labelled foods in grocery stores is a growing business in Europe and the United States. The aim of the labelling scheme is to improve working and living conditions for export-oriented small-scale farmers and hired labour in developing countries The purpose of this report is to analyse the effects of the Fairtrade labelling scheme (Rättvisemärkt in Sweden) using economics theory

Popular Abstract in Swedish Hematopoes är bildandet av blodceller. Blodbildningen har sin utgångspunkt i benmärgen i stamceller vilka ger upphov till i huvudsak åtta typer av blodceller med var sina specifika uppgifter. De röda blodkropparna transporterar syre från lungorna ut i hela kroppen,blodplättar har sin främsta funktion i att initiera stopp av en blödning,granulocyter och makrofager äter uA common feature in myeloid leukemia is suppression of normal hematopoiesis, leading to infections, bleeding and anemia. It has been suggested for a long time that leukemic cells possess a growth-advantage by overproducing an inhibitor - a leukamia associated inhibitor. Such an inhibitor has been characterized in leukemic cells as well as subpopulations of normal bone marrow and blood cells, sugge

Systematic studies of the literature can be done in different ways. In particular, different guidelines propose different first steps in their recommendations, e.g. start with search strings in different databases or start with the reference lists of a starting set of papers. In software engineering, the main recommended first step is using search strings in a number of databases, while in inform

The growth behaviour of Au-catalyzed III-V semiconductor nanowires and nanotrees is strongly affected by the temperature dependent interaction between the catalytic Au particle and the particular III-V material

Two new kinds of fractional-rate trellis source codes based on linear congruential recursions are evaluated. Properties of good codes are given. Square error distortion is similar to or better than competing schemes

Jämlikhet står inte i strid med variation och mångfald i samhället, utan är en garanti för att varje människa ges reella möjligheter att utveckla sin särart.

“Can an engineer, using a current simulation modelling programs, produce evacuation flow rates of a live emergency evacuation a priori to the analyses of the evacuation?” The above question is explored with reference to previous pre-evacuation modelling attempts and a new series of “small-scale” underground train evacuation experiments conducted under the METRO research project. METRO is concerne

Popular Abstract in Swedish År 2011 är det exakt 20 år sedan lärarkåren kommunaliserades. Reformen ger fortfarande upphov till diskussioner, inte minst från liberalt håll diskuteras idag lärarprofessionens status och vilka konsekvenser kommunaliseringen har medfört. I Professionens problematik analyseras motiven bakom kommunaliseringen. Historikern Johanna Ringarp visar att reformen var ett led i On 8 December 1989, the Swedish Parliament resolved that the state regulation of teaching positions would be terminated beginning on 1 January 1991. The parliament’s decision came on after fierce debates that took place in both teacher staff rooms and in public in 1989. Almost 20 years later, the reform still gives rise to controversy, and current political debates also touch on the possibility of