Filtyp
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 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
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
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 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
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
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
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
A numerical study has been carried out for slot jet impinging on flat and concave surfaces. Five turbulence models are employed for the predictions of these strongly strained turbulent flows, namely linear eddy viscosity model (LEVM), low-Re explicit algebraic Reynolds stress model (EASM) and three different V2F models. A bounded formulation for Cμ was also introduced to account for the
This paper presents an exploration framework which performs data assignment and access scheduling exploration for applications given a multilayer memory architecture. Our framework uses multiobjective criteria during exploration, such as application execution time, energy, bandwidth, and data size. In order to tackle the complexity of the exploration, it is divided into three phases; Pareto diagra
