Ickelinjär stabilitet är en typ av beteende för ickelinjära evolutionsekvationer som beskriver om stationära lösningar förändras mycket under små störningar av startvärdet. Detta beteende är viktigt inom flera områden då det hjälper att förstå hur exempelvis vågor utvecklas med tid: Vissa vågor förändras inte trots små störningar medan andra förfaller. I denna masteruppsatts undersöks instabilitetIn this thesis we explore the connection between spectral stability and nonlinear stability of evolution equations. Using semigroup theory a result on nonlinear instability from spectral instability is proven. This result is then applied to two examples: Travelling heteroclinic solutions of the Kuramoto-Sivashinsky equation and constant solutions of the Lugiato-Lefever equation.

Assisted Voluntary Return and Reintegration (AVRR) is the preferred method of European States, to return those that do not have a residency status. Germany has one of the oldest voluntary return policies, during the recent influx of migrants, caused by the Syrian civil war, AVRR policies have been rediscovered by state actors. Welfare organizations and other wellbeing centers offer counseling towa

För att matematiskt modellera beteendet av fluider används de välkända Navier-Stokes ekvationer. Dessa har visat sig vara relativt svåra att studera, och är ett aktivt forskningsområde i dagsläget. I denna uppsats studerar vi en förenklad version av Navier-Stokes ekvationer i tre rumsdimensioner, nämligen Eulers ekvationer. Vi tittar på det fallet där man antar att fluidens hastighet och tryck är In a paper from 1970, Lortz constructs rotational solutions to the steady Euler equation in toroidal domains using a fixed point method. We shall review this method and rewrite it using Banach's fixed point theorem. Using the ideas presented we shall also consider rotational flows in unbounded cylinder type domains, with a given periodicity condition. This is motivated in part by the study of

This thesis is based on a case study conducted during eight weeks in a youth project in Colombia. The project aims to support vulnerable youth from communities outside Cartagena into entering higher education and enhance their engagement in social work in their communities. The purpose of the thesis was to investigate how the relationships established in the project interplayed with the project’s

The aim of this study is to examine if the gender wage gap is affected by how generous parental- and paternity leave policies are. Previous papers have shown that women and men are affected differently after becoming parents. While women see a penalty in the labour market, men’s wages tend to increase. (Budig, 2014). This phenomenon is called the family gap and historical research stress it as one

3,5 miljarder år gamla bakterier kan rädda våra vatten från metallutsläpp Långt innan det fanns syre i atmosfären så fanns bakterier som ”andades” svavel. I stället för att andas ut koldioxid andas dessa bakterier ut sulfid, en negativt laddad svaveljon som binder till metaller. På en avfallsanläggning utanför Hässleholm står en testanläggning där man forskar på att minska utsläppen av metaller tHässleholm Miljö who own the landfill site in Vankiva in southern Sweden are having difficulties in keeping their heavy metal emissions within the limits of their very strict permit. Today reduction is reached by chemical precipitation, but a more effective and environmentally friendly process is wanted. Biological heavy metal removal in leachate water, using sulfate reducing bacteria (SRB) and me

The modus operandi of most asset managers is to promise clients an annual risk target, where risk is measured by realized standard deviation of portfolio returns. Moreover, Markowitz (1952) portfolio selection requires an estimate of the covariance matrix of the returns of the financial instruments under consideration. To address both these problems, we develop a data-driven method for covariance

SAMMANFATTNING Titel: Gynnas konkurrerande jordbrukare av samarbete? Datum för slutseminarium: 2020-01-17 Kurs: FEKH19, Företagsekonomi: Examensarbete i Strategic Management på kandidatnivå̊. Författare: Denis Larsson, Lovisa Niilekselä, Ida Sundström och Ellen Traung. Handledare: Magnus Johansson. Nyckelord: Samarbete, konkurrens, jordbruk, medlemmar, Co-opetition och kooperativ. Syfte: Syftet meABSTRACT Title: Do competing farmers benefit from cooperation? Seminar date: 2020-01-17 Course: FEKH19, Business Administration: Bachelor Degree Project in Strategic Management Undergraduate Level. Authors: Denis Larsson, Lovisa Niilekselä, Ida Sundström and Ellen Traung Advisor: Magnus Johansson. Keywords: Cooperation, Competition, Agriculture, members, Co-opetition and cooperatives. Purpose: The

Lipases are the main fat digestive enzymes present in the digestive system of many animals, microorganisms and plants. Probiotic microorganisms that can possibly produce enzymes are of crucial importance since it can have an effect on human health. Two of the main probiotic strains are Lactobacillus rhamnosus and Biffidobacterium longum, in each there was a putative lipase encoded on the DNA and t

Arbetsmiljöverket har konstaterat att det förekommer stora skillnader i arbetet med den psykosociala arbetsmiljön beroende på om man arbetar inom privat eller offentlig sektor, det kan också konstateras att små företag i regel är sämre på att bedriva psykosocial arbetsmiljö. Detta ställer höga krav på arbetsgivaren som bär ansvaret för att riktlinjer som finns inom området också efterföljs. De som

Utvecklingen av den digitala handeln (e-handeln) har bidragit till att våra konsumtionsmönster och krav på tillgänglighet har förändrats. I ett försök att bemöta förändringarna har handeln ställt krav på ökad flexibilitet i bemanningen av de fysiska butikerna. Vilket har resulterat i att användandet av tidsbegränsade anställningarna inom detaljhandeln ökat på bekostnad av tillsvidareanställningar.

DNA barcoding is a powerful and inexpensive tool for identifying genetic material. Identification of plasmids is especially important for tracking the global spread of anti-biotic resistance. In this study, new methods were presented for identifying plasmids using DNA barcodes that combine two very different DNA labelling types. Labelling using the affinity based technique of competitive binding w

The aim with this bachelor thesis is to analyse the debate regarding Adam of Bremens depiction of the famous Uppsala-temple within contemporary archaeological research, with the purpose to determine how the scholars have approached the question about the credibility and truth of the depiction. The purpose does also include examining the main viewpoints and their arguments within this debate. The q

Contactless palmprint recognition is a biometric technology which due to its ease of acquisition, non invasive nature and potentially cheap cost can come to stand competitive to more widely used biometric traits such as finger- or facial recognition. This work uses two different feature extraction methods for palmprint images, the Scale invariant feature transform (SIFT) with an iterative random s

In this thesis, we present the Angle of Arrival (AoA) technique to detect the direction of a source indoors using radio frequency (RF) signal. This technique estimates the direction of the incoming Bluetooth signal, using a tag as a transmitter and an array equipped with a number of antennas as a receiver. We explore the theoretical basis of array processing and algorithms for direction finding. A

När geologer vill ta reda på hur marken är uppbyggd och vilka bergarter som finns kan det vara läge att borra ett hål. Men för stora geologiska undersökningar, där man vill kolla på stora markytor eftersom det ska grävas en tunnel eller byggas en väg, är det viktigt att kunna ta reda på hur marken ser ut överallt. Då är det smidigare att modellera markens egenskaper. Ett sätt att se igenom marken Denoising and drift removal are important for improving the usability of the DCIP (Direct current resistivity and time-domain induced polarisation) method. This is useful because the need for detailed subsurface analysis increases with city construction and environmental projects. One issue with conducting DCIP measurements in urban areas is low-frequency drift from DC power (trains, trams, and po

Semiconductor nanowires, with their quasi one-dimension geometry, inherently provide strain relaxation for heterogeneous integration and also strong light mode confinement. Nanowire-based photonic devices have also been demonstrated to offer significantly enhanced quantum efficiency, gain and reduced noise. This project deals with electro-optical investigations of InP nanowires with axially embedd

Denna studie belyser problematiken kring den rättsliga bedömningen avseende existensen av flera osäkra rättsfakta. För att ett rättsfaktum ska anses bevisat behöver det göras sannolikt till den grad som motsvarar beviskravet. Det råder dock delade meningar om hur beviskravet ska uppnås då flera osäkra rättsfakta är föremål för rättens prövning. Ska varje rättsfaktum bedömas för sig eller är det deThis study illustrates the problem of the legal assessment regarding the existence of several uncertain dispositive facts. In order for a dispositive fact to be considered proven, it has to be made probable to the degree that corresponds to the evidentiary requirement. However, there are divided opinions on how to reach the evidentiary requirement as several uncertain dispositive facts are subject

Developing and strengthening the agricultural sector is an important tool for reducing poverty, hunger and inequalities in developing economies. Successful linkages between small-scale farmers and the business sector through supply chains and business models are necessary to bridge the current gap between them and create mutually beneficial partnerships within the modern food industry. The concept