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Numerical simulations of quantum transport in semiconductor nanowires

Samhället i stort drar nytta av teknologisk utveckling; kanske underlättar den vår vardag, gör att samhället kan spara resurser eller gör viktig utrustning snabbare och noggrannare. En av de moderna grenarna av teknologi kallas nanoteknologi och innefattar konstruktion och tillämpning av strukturer på nanometernivå, det vill säga mycket små saker. Till exempel är så kallade nanotrådar, som detta pThe study of electronic transport in chemically synthesized semiconductor nanowires is an active field of research, with potential applications in areas such as quantum computing and nanoelectronics. Motivated by recent experimental progress, we use a simple non-atomistic tight-binding model implemented in open-source software to simulate quantum electronic transport in such nanowires. Including v

When money grows on trees-The case of beyond-compliance companies sourcing from the Amazon Rainforest

The Amazon Rainforest is in grave danger of disappearing for good, due to a number of harmful economic activities, including land conversion for cattle ranching and monoculture, as well as unsustainable and illegal timber production. It has been shown, however, that the private sector has a crucial role in redressing socio-economic problems, causing deforestation and degradation. To illustrate thi

Hur barn som far illa uppmärksammas i skolan: Om utmaningar, risker och möjligheter med anmälningspliten utifrån ett skolkuratorsperspektiv

The purpose of this study was to examine how the school welfare officers practice and think of the obligation to report child maltreatment and neglect to the social services according to the Swedish Social Service Law. The aim of the study was also to examine how the school welfare officere view upon the cooperate with other school staff and with the social workers at the social services due to th

A Comprehension of Spinoza's God: Through the Dichotomy of Labels

Abstract: The 17th century philosopher Spinoza is known for his concept of God as One Substance, God or Nature and therefore considered as a monist and categorized as a naturalist. He has been labeled an atheist and God-intoxicated man, as well as a determinist and pantheist, which I perceive to be dichotomies. The problem, as I see it, is that Spinoza’s philosophy and concept of God has mainly be

An Intentional Look at the Chinese Room

The Philosophy of Mind, which pertains to the study of mental properties and physical properties in relation to the world, has been around since the 4th century with philosophers like Socrates and Plato. The Mind and Matter Problem, also known as the Body and Soul Problem, deals with the issues of identifying and understanding the apparent difference between the mental mind or soul and the physica

Väderskyddsdukar – Antändlighet och brandspridning

The aim of this thesis is to study the flammability and fire spread for textile membranes for weather protection. This thesis includes literature studies to determine current standards and recommendations available. Main focus however have been on the European classification system EN 13501-1 and construction site safety. Two types of experimental tests have been done, cone calorimeter test and te

Tidsseriemodellering av fyra oreglerade älvars vattenföring - En explorativ studie med GARCH- och Tröskelteknik

Denna uppsats undersöker möjligheten att modellera fyra svenska oreglerade älvars vattenföring mellan 1980-2015 med hjälp av ARMA-, GARCH- och SETAR-modeller. Genom att studera den mängd vatten som transporteras i vattendrag och hur dess beroendestruktur ser ut i allmänhet kan förståelse om bland annat djurliv och klimateffekter fördjupas. Tidsseriens process behandlas som ett additivt system där This paper studies the possibility to model the water flows of four Swedish unregulated rivers between 1980-2015 with ARMA, GARCH and SETAR models. By examining the amount of water that flows through the river and what the dependence in the process looks like in general, a further understanding for effects on for example wildlife and climate changes can be developed. The process of the time series

Refined distribution of frit. Method and design tool for improved thermal comfort in glazed spaces.

Thermal comfort in highly glazed buildings has long proven to be a troublesome matter due to unwanted passive solar heat gains. Excessive solar gains are commonly counteracted with energy-intensive cooling systems and/or comprehensive shading devices. Shading devices are used to adjust solar heat transmission through glazing. Conventional devices may be protruding such as lamellas and overhangs o

Improving a plant’s operations by applying lean manufacturing on the material flow and layout design

Toyota Motor Company förändrade världen med sitt produktionssystem. Genom att ta bort aktiviteter som inte adderade värde till produkten, kunde företaget bli agilt med korta ledtider till kunden och till en låg produktionskostnad. För att bli konkurrenskraftiga tvingades företag världen över förändra sina produktionsprocesser och en västlig variant av Toyotas produktionsfilosofi uppstod. Denna varToyota Motor Company changed the world with their production system. By removing activities in the manufacturing process that were not adding any value to the product, the company could become agile and offer products to the customer with short lead time as well as to a low cost. Companies in other countries needed to change their manufacturing processes in order stay competitive and a western var

Interspecific competition affects spore germination and gametophyte development of mosses

Even though protonemal development of bryophytes has been well studied, it remains unknown whether interspecific competition among mosses species affects their early growth and development. This study evaluated the effects of interspecific competition on in vitro germination and gametophyte development between each pair-wise combination from six common moss species: Atrichum undulatum, Bryum argen

Procedurally Generating an Artificial Galaxy

Idén om att processuellt generera artificiella världar är gammal. Metoden används både för CGI effekter i filmer och, framförallt, för tevespel. Det görs av stora företag och mindre studios; av professionella programmerare såväl som nybörjare och hobbyister. Det är ett kraftfullt verktyg som möjliggör även små team att skapa enorma världar. Men även om det finns mycket inspiration att hämta kan deThe idea of procedurally generating artificial worlds has been around for a long time. It is used both for CGI effects in movies and, more prominently, for video games. It is done by big companies and small teams; professionals as well as beginners and hobbyists. It is an instrumental tool that enables even the smallest of development teams to create large worlds. While there is a lot of inspirati

Evaluation of Quantitative PET/CT Usage for Cancer Treatment

PET/CT OCH CANCERBEHANDLING – RESAN MOT ETT BOTEMEDEL OCH HUR DET KAN UPPTÄCKAS Cancer – vi blir alla på något sätt påverkade av denna hemska sjukdom och om vi inte gör något drastiskt kommer det snart vara den främsta dödsorsaken i världen. PET/CT är ett analyssystem som kan bidra till en förbättrad cancerbehandling, men för att verkligen ta vara på all dess information måste det undersökas hur Cancer is a disease affecting practically the entire society in one way or another. A great effort is made to find a cure and positron emission tomography/computed tomography (PET/CT) has recently become a vital part to achieve this goal. The reason for this is because PET/CT provides an opportunity to obtain more tumor information than other techniques, which in turn could improve cancer treatmen

Utförsäljning, allt ska bort! (Investerares motvilja att köpa oetiska aktier öppnar upp för möjligheter)

Syfte: Att undersöka ifall det går att generera överavkastning genom att enbart investera i branscherna alkohol, spel, tobak och försvar. Detta genom att jämföra dessa investeringar mot indexet MSCI Europe och den etiska fonden SEB Ethical Europe. Metod: Med hjälp av programmet Thomson Reuters Datastream har fakta kring bolagen tagits fram och sorterats in utifrån branschtillhörighet. Denna data

Metodik för riskklassificering av byggnader i samband med en grundvattensänkning

En styrd grundvattensänkning är ett vanligt inslag i byggprojekt där markarbeten sker under grundvattennivån. Under byggtiden sänks grundvattennivån genom att grundvatten pumpas upp genom installerade brunnar. En sänkning av grundvattennivån minskar portrycket och ökar effektivspänningen i jorden vilket medför marksättningar. Storleken på marksättningar beror på avsänkningens storlek och jordegensDuring a construction project where excavation is made beneath the water table, it is common to perform a lowering of the water table. The groundwater can be extracted by installed wells in the stratum of water-bearing soil. A lowering of the water table results in a decreased pore pressure and in an increased effective stress in the soil. An increased effective stress results in ground settlement

Additive Manufacturing in Production - for the Automotive Industry

Additive manufacturing (also known as 3D printing and abbreviated AM) opens up for numerous opportunities in increasing business profit while perhaps also improving sustainability. There are some knowledge gaps though in how and when AM could be implemented successfully for production purposes, and as AM is quite information intensive it is also problematic to keep track of advances in technology

Svenskhet som politisk mobilisering

Social identity is a well established concept in social psychology, and nationality as social identity has been theorised to function as a powerful tool for political mobilisation in democratic elections. With this in mind, the purpose of this text is to analyse how the Swedish far-right political party the Sweden Democrats constructs the social identity Swede. To this end, a discourse analysis of

Den dyslektiske musiklärarens värld - en undersökning av hinder och möjligheter

Studien undersöker hur musiklärare med diagnosen dyslexi hanterar sin arbetssituation i skolan. Syftet med undersökningen har varit att utforska några av de överväganden och konkreta metoder som används i den praktiska lärargärningen. Studien undersöker även hur dessa musiklärare själva upplever sin situation och hur de förhåller sig till hinder och tillgångar. För att främja bästa möjliga lärsitu

Ramsvikslandets Naturreservat; en utvärdering av skötseln, kopplat till hotade gentianaväxter

Liten blomma i backen, formad av bondens blod, svett och tårar En bit innan semesterparadiset Smögen, ligger en liten ö med mångårig historia. Här har marken odlats under många hundra år. På sommaren slåttrade man gräset, bar det till höbalar, och korna betade lojt på med utsikt över klipporna och havet. Störningarna var stora på gräsmarkerna, lien skar av växterna och korna betade, för många växWith the gain of productivity in farming the last decades, there has been great loss in species richness. Many plant species that have evolved and adapted alongside to traditional farming and benefiting to the managed land use, are now disappearing in great numbers. Three thirds of Sweden’s endangered plant species are those who thrive in managed grasslands like meadows and grazing areas. The trad

När livet inte längre känns värt att leva- en kvalitativ intervjustudie om sex professionellas syn på orsaker till suicidalitet

Suicide among young people are a serious problem worlwide as well in Sweden. The main purpose with this study was to examine and understand how suicide can be explained- to identify possible causes to suicide behaviour among young people. Through a qualitative approach, I interviewed six people who are working with young people in different ways. The main- result from this study shows that suicid