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Carex humilis - a caespitose clonal plant: ramet demography, ring formation, and community interactions

Popular Abstract in Swedish Carex humilis - en ringbildande klonväxt Växter som kan föröka sig asexuellt kallas klonväxter. Det genetiska individet (geneten) består då av flera självständiga plantor (rameter). Exempel på klonväxter är hallon, jordgubbe, kvickrot, potatis, tulpan och vitsippa. Den här avhandlingen handlar om ett centraleuropeiskt klonalt halvgräs, som heter Carex humilis på latin Carex humilis forms rings of densely aggregated ramets in dry grassland vegetation in Central Europe. In the thesis I conclude that ramet demography is important both for analyzing fitness in clonal plants and for understanding how C. humilis rings are formed. I studied the ramet demography of C. humilis from 1993-1998 at the Hexenberg mountain, 300 m.a.s., 60 km east of Vienna, Austria. In total,

Universal Method for Synthesis of Artificial Gel Antibodies by the Imprinting Approach Combined with a Unique Electrophoresis Technique for Detection of Minute Structural Differences of Proteins, Viruses and Cells (Bacteria) Ib. Gel Antibodies against Proteins (Hemoglobins)

Using the molecular imprinting approach, we have shown that polyacrylamide-based artificial antibodies against human and bovine hemoglobin have a very high selectivity, as revealed by the free-zone electrophoresis in a revolving capillary. By the same technique we have previously synthesized gel antibodies not only against proteins but also against viruses and bacteria. The synthesis is thus unive

Electronic structure of nanometer-sized semiconductor crystals

We report on a theoretical study of the electronic structure of semiconductor nanocrystals, based on a tight-binding method. Both one- and zero-dimensional structures have been studied. Concerning the one-dimensional structures, the effect of the confinement on the band structure of nanowires has been studied. We find that a transition from direct to indirect band gap occurs in the band structure

Grundad teori : Teorigenerering på empirisk grund

Grundad teori är en metod för kvalitativa undersökningar inom samhälls- och beteendevetenskaperna. Den utvecklades på 1960-talet och har blivit allt mer spridd. Det är en induktiv metod, baserad på idén att man växelvis samlar in och analyserar data. På detta sätt kan teorier som är helt grundade i data genereras. Metodens komplexitet, och olika tolkningar av den, har emellertid lett till att det

On the approximability of maximum and minimum edge clique partition problems

We consider the following clustering problems: given a general undirected graph, partition its vertices into disjoint clusters such that each cluster forms a clique and the number of edges within the clusters is maximized (Max-ECP), or the number of edges between clusters is minimized (Min-ECP). These problems arise naturally in the DNA clone classification. We investigate the hardness of finding

Revisiting the Ziegler-Nichols step response method for PID control

The Ziegler-Nichols step response method is based on theidea of tuning controllers based on simple features of thestep response. In this paper this idea is investigated fromthe point of view of robust loop shaping. The results are:insight into the properties of PI and PID control andsimple tuning rules that give robust performance for processes with essentially monotone step responses.

Climate and trade policies in a post-2012 world

Climate and Trade Policies in a Post-2012 World is a collection of short forward-thinking articles by leading experts on the relationship between trade and climate change policies. The idea for developing this publication was conceived at the “International Workshop on Post-2012 Climate and Trade Policies”, jointly organized in September 2008 by the United Nations Environment Programme (UNEP) and

Investigation of the two-phase flow field of the GTX100 compressor inlet during off-line washing

A modern gas turbine compressor, with its highly aerodynamically loaded blades, is sensitive to changes in profile shape and to surface roughness. Fouling is inevitable, despite highly efficient filtration systems. The remedy to this problem is washing. There are two different approaches, online or off-line washing. The off-line wash is the most effective one, whilst on-line washing only prolongs

Pressen i provinsen : Från medborgerliga samtal till modern opinionsbildning 1750-1850

Popular Abstract in Swedish Att vara kritisk till våra dagars medier är en självklarhet, medan 1800-talets presspionjärer däremot har fått behålla hjältestatusen. I "Pressen i provinsen" tecknas den moderna pressens genombrott dock som en utdragen och långtifrån entydig process. Från att på 1700-talet ha varit arenor där alla hade rätten att delta i det upplysta samtalet, blev tidningarna under böThis study treats ideas of how newspapers should be edited, from the middle of the 18th century to the middle of the 19th century. It deals both with notions of communication and how these were carried out. The empirical focus is on the Swedish province Östergötland and its two main cities, the ecclesiastical, military and administrative Linköping and the mercantile and financially important Norrk

The effects on safety, time consumption and environment of large scale use of roundabouts in an urban area:

An experiment with small roundabouts – as speed reducing measures - was carried out in a Swedish city. The purpose of the study was to test the large scale and long term effects of the roundabouts. The results showed that the roundabouts reduced the speed considerably at the junctions and on links between roundabouts. The lateral displacement the roundabout forces the driver to has a great importa