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A novel process for the production of biodegradable lubricant-based stocks from epoxidized vegetable oil with a lower pour point via cationic ion-exchange resins as catalysts was developed. This involves two steps, first, ring-opening reactions by alcoholysis followed by esterification of the resultant hydroxy group in the first step. The ring-opening reaction of epoxidized soybean oil with differ
Blood samples from 141 children and adolescents were used to evaluate differences between commercial kits and radioimmunoassay (RIA) methods for detecting thyroid autoantibodies. Thyroglobulin autoantibodies (Tg-Ab) were analyzed with a hemagglutination kit and a RIA; thyroid peroxidase autoantibodies (TPO-Ab) were measured with a gelagglutination assay and a RIA. The result; of the antibody tests
In occupational therapy and occupational science, it is important to clarify the perspective from which the analysis of occupation is addressed. The purpose of this paper is to present a tentative structure for describing occupation, allowing for analysis in a lifelong panorama as well as for the immediate experience a person acquires from performing a single occupation. The concept of occupationa
This paper presents an original mathematical framework based on graph theory which is a first attempt to investigate the dynamics of a model of neural networks with embedded spike timing dependent plasticity. The neurons correspond to integrate-and-fire units located at the vertices of a finite subset of 2D lattice. There are two types of vertices, corresponding to the inhibitory and the excitator
As part of the development of the teaching of literature in school, it is also important to reflect upon what pupils read outside school. This thesis deals with the spare time reading of twenty 15-16-year-old girls which has been examined during a two-year period. Empirical material related to young girls’ reading is examined in a variety of scholarly methods. Young girls’ reading is studied in th
A search for scalar top quarks in R-parity violating supersymmetry is performed in e(+)p collisions at HERA using the H1 detector. The data, taken at roots = 319 GeV and 301 GeV, correspond to an integrated luminosity of 106 pb(-1). The resonant production of scalar top quarks t in positron quark fusion via an R-parity violating Yukawa coupling lambda' is considered with the subsequent bosonic sto
Environmental simulations are increasingly used in urban planning to assess parameters that influence adequate living conditions in densification projects, such as daylight access, noise exposure, wind comfort, and flood risk. These simulations rely on geospatial data and on the representation of the urban environment through 3D city models. However, in current planning practice, simulation result
Byggnader med synnerligen högt kulturhistoriskt värde kan förklaras som byggnadsminnen av länsstyrelsen. Ett byggnadsminne är särskilt skyddat från ingrepp genom skyddsbestämmelser i kulturmiljölagen (1988:950) (KML). Även i plan- och bygglagen (2010:900) (PBL) finns skyddsbestämmelser för byggnader som är särskilt värdefulla från en kulturhistorisk synpunkt. Medan länsstyrelsen genomför all myndiBuildings of exceptionally high cultural and historical value can be designated as listed buildings by the County Administrative Board, granting them special protection against alterations through protective provisions in the Historic Environment Act (1988:950) (KML). Additionally, the Planning and Building Act (2010:900) (PBL) contains protective regulations for buildings that are classified as p
Sea ice is strongly impacted by global warming, and its decline further alters the global climate. Climate models are important tools for examining those future sea ice changes and the interaction of sea ice with other Earth system components such as the atmosphere and the ocean. Typically, these components are simulated with separate codes. The interaction between these components is typically mo
Ever since the end of the second world war, Europe has been lagging behind the United States in rocket development. In particular in the last 10 years, the technological gap and American competitive advantage have grown thanks to SpaceX’s development of reusable launch vehicles. A key enabler for the reusability of booster stages is precise rocket engine control. This thesis addresses the objectiv
This thesis investigates probing antennas within a small shielded test enclosure for IoT, Internet of Things, products for the detection of manufacturing deviations. The small enclosure forces the transmitter and receiver to be in the near-field. Shielding of the enclosure additionally generates a multipath environment, which becomes sensitive to displacements of objects such as wires or metallic
The aim of this master's thesis is to establish material models for three rubber materials using macroscopic data collected using Digital Image Correlation, DIC. DIC is a non-contact optical technique for measuring strain and displacement in a material by tracking points on a material during the deformation process.\\ The rubber materials are tested in both uniaxial tension and compression, fr
De utmaningar som dagens och kommande generationer står inför, till följd av klimatförändringarnas konsekvenser, har inga motsvarigheter i historien. Därför utmanas vårt tänkande och agerande från grunden. Som en följd av detta finns en rörelse som försöker påverka politiken och samhället i en mer hållbar riktning: klimataktivisterna. I oktober 2024 friades en klimataktivist av Stockholms tingsrätThe challenges faced by current and future generations as a result of the impacts of climate change are unprecedented. Therefore, our modes of thinking and acting are being fundamentally challenged. As a result, a new climate movement has emerged, calling on politicians to ensure sustainable policies and societies. In October 2024, a climate activist was acquitted by the Stockholm District Court o
Traffic congestion is a persistent problem in modern urban environments, causing delays, increasing pollution, and negatively affecting the quality of life of millions of city dwellers. As urban populations grow, the need for intelligent traffic man- agement systems becomes more pressing. This thesis presents a novel approach to real-time traffic management using edge computing in conjunction w
Upphovsrättens grundläggande syfte är att säkerställa en rimlig balans mellan skyddet av upphovsmannens rättigheter och möjligheten att utnyttja kulturella och kreativa verk i samhället. Frågan om hur ersättningen till upphovsmän och utövande konstnärer bör fastställs vid överlåtelser av rättigheter är central inom upphovsrätten. I syfte att bidra till en fungerande digital inre marknad, stimuleraThe fundamental purpose of copyright is to ensure a fair balance between the protection of authors’ rights and the ability of society to access and exploit cultural and creative works. The question of how remuneration for authors and performing artists should be determined in cases of transfer of rights is a central issue within copyright law. With the aim of contributing to a well- functioning di
De tidigaste bevarade svensk-norska dokumenten om Lappmarken skrevs på 1300-talet, och därefter finns ett växande historiskt källmaterial som förser med en relativt tydlig bild av samernas rättigheter genom tiderna. Statens intressen förändrades med industrialiseringens framväxt, och avvittringen av Lappmarkerna påbörjades. Samiska försörjningssätt urholkades av staten under 1880-talet, och LappmaThe Sámi people's legal history can be found in written documents dating back as far as the 14th century. With industrialization, the State’s priorities underwent significant changes, and land that had once held little value to the State was now seen as economically beneficial. It was made clear that land traditionally used by the Sámi population belonged to the State. The Reindeer Grazing Act
I juli 2024 överlämnade regeringen betänkandet Ett ändamålsenligt samhällsskydd – Vissa reformer av straff- och straffverkställighetslagstiftningen (SOU 2024:48). Syftet med utredningen var att stärka skyddet för samhället, öka tryggheten för brottsoffer samt skärpa konsekvenserna vid återfall eller misskötsamhet. En del av uppdraget var att överväga införandet av en ny tids-obestämd frihetsberövaIn July 2024, the Swedish government submitted the report ”An Appropriate Protection of Society – Some Reforms to Criminal Law and Penal Enforcement Legislation" (Ett ändamålsenligt samhällsskydd – Vissa reformer av straff- och straffverkställighetslagstiftningen, SOU 2024:48). The aim of the government inquiry was to strengthen public safety, increase protection for the victim of crime, and
Denna studie undersöker hur ålder påverkar stödet för välfärdsstaten som ett mått på ideologiska förändringar bland unga medborgare i Sverige. Denna studie bygger på data från European Social Survey från 2020 med vilken studien utför en statistisk tvärsnittsanalys för att undersöka stödet för välfärden bland unga i jämförelse med andra åldersgrupper vid en viss tidpunkt. Tidigare forskning indiker
Bakgrund: Lärmiljön i grundskolan är inte anpassad för elever med autism, utan ställer höga krav på förmågor som generellt sett är påverkade vid autismspektrumtillstånd. Tidigare forskning fokuserar på elevers beteende och sensoriskt baserade interventioner men det finns få studier kring hur lärmiljön kan utformas efter behoven hos elever med autism. Syfte: Syftet med studien var att undersöka hurBackground: The learning environment in elementary school is not adjusted for students with autism, putting high demands on abilities generally affected in autism spectrum disorder. Previous research focuses on students’ behavior and sensory-based interventions but there are few studies on how to make the learning environment accessible for students with autism. Aim: To investigate how occupation
