Sökresultat

Bidirectional Low Temperature Networks (BLTNs) are an innovative technology of district heating and cooling systems. Because of their intrinsic feature of supplying simultaneous heating and cooling either directly from an energy source/sink or through distributed heat pumps and chillers, circulation pumps installed at each building extract water from the network and a distinct pressure cone is sub

Model Predictive control (MPC) has been studied extensively because of its ability to handle constraints and its great properties in terms of stability and performance [Mayne et al., 2000]. We have in this thesis focused on MPC of Hybrid Systems, i.e. systems with both continuous and discrete dynamics. More specifically, we look at problems that can be cast as Mixed Integer Quadratic Programming (

Brent geese, Branta bernicia hrota, were equipped with satellite transmitters on a spring stop-over site in Iceland. The brent geese deposit heavy fuel reserves for long-distance flights across the high Greenland ice-cap to breeding destinations in north Canada. Satellite tracking of brent geese on this journey serves the twofold purpose of testing specific predictions about: (i) size-dependent po

Background: Turner syndrome (TS) is a complex genetic disorder with raised mortality. Our objective was to investigate mortality and causes of death in TS. Methods: A matched retrospective observational study of women with TS recruited from the Turner centers in Sweden were conducted. A total of 472 women with TS, ≥16 years old with a cytogenetically verified diagnosis and 2357 controls, matched f

There can be situations, for example if gas containers have been damaged in a vehicle crash, when the fire and rescue service would like to depressurize the gas containers through shooting with a civilian rifle. Modern high-pressure hydrogen containers are designed for a working pressure of 700 bars. This means that they have a very thick and strong shell made of composite material. At the same ti

Cubosomes are non-lamellar lipid nanoparticles that have drawn a significant attention in the field of nanomedicine due to their tunable properties. However, the formation of vesicles during the preparation of cubosomes, and the presence of mixed bicontinuous cubic phases, may lead to artifacts and lack of correlation between the physico-chemical and biological characterization. In this work, we h

Aim: Healthcare services are in need of tools that can help to ensure a sufficient capacity in periods with high prevalence of respiratory tract infections (RTIs). During the COVID-19 pandemic, we forecasted the number of hospital admissions for RTIs among children aged 0–5 years. Now, in 2024, we aim to examine the accuracy and usefulness of our forecast models. Methods: We conducted a retrospect

Objectives: Decision-analytic models assessing the value of emerging Alzheimer's disease (AD) treatments are challenged by limited evidence on short-term trial outcomes and uncertainty in extrapolating long-term patient-relevant outcomes. To improve understanding and foster transparency and credibility in modeling methods, we cross-compared AD decision models in a hypothetical context of disease-m

The evolution of compact groups of galaxies may represent one of the few places in the nearby universe in which massive galaxies are being forged through a complex set of processes involving tidal interaction, ram-pressure stripping, and perhaps finally "dry mergers" of galaxies stripped of their cool gas. Using collisionless N-body simulations, we propose a possible scenario for the formation of

It is common for a system integrator to make use of third party intellectual property (IP) blocks from multiple vendors in the design of a circuit. These IPs may include test features, known as instruments, which are connected to a reconfigurable scan network, such as an IEEE Std. 1687 (IJTAG) network, for efficient on-chip integration and communication.Using third party instruments this way becom

Introduktion Simuleringsmetoder är något som numera förekommer i en mängd olika sammanhang. De förekommer i olika former vid produktutveckling i industrin samt för att t ex studera komplexa system inom vetenskapen. Utöver detta förekommer det även i spel-och filmindustrin. I det stora hela handlar det om att skapa en förenklad dator-representation av verkligheten, så att man kan studera vissa föIn this thesis, an implementation of inline integration is described and examined. Inline integration is a mixed symbolic and numerical method for simulating fully implicit ordinary differential equations (DAE:s) whereby discretizations are introduced symbolically at model level. A generalized solution to the discretized model containing tailored iterative solving schemes and symbolic solutions is

Freezing is a method used to preserve food for long periods of time by reducing the rate of naturally occurring reactions and growth of microorganisms. However, some irreversible quality changes, both physical and chemical, can take place during the freezing step. After being frozen, the products are stored until thawed and consumed. This thesis studies innovative freezing technologies to understa

Examensarbete vittnar om bättre tider för njursjuka För få utförda kontroller av vattenkvalitet kan medföra livshotande tillstånd för njursjuka dialyspatienter. Ny teknik kan öka provtagningsfrekvensen och höja säkerheten. Den konstgjorda njuren Dialys är en behandling som syftar till att ersätta njurarnas funktion; att rena blodet från gifter och överflödig vätska. Vid hemodialys, även kallad bRenal diseases are an increasing problem worldwide and when kidney transplantation is not possible, dialysis treatment is the solution. An increasing number of patients choose to perform their dialysis treatment at home by implementing the dialysis machine and a water purification system in current electric and water supply, so called home hemodialysis. The quality of the water used for the prepar

Syftet med förevarande uppsats är att belysa den sakrättsliga problematiken kring lösöreköp genom att undersöka huruvida avtalsprincipen är förenad med tillräckligt stora fördelar för att ersätta den nu gällande traditionsprincipen. Traditionsprincipen har tillämpats i svensk rätt sedan 1800-talet. Dessförinnan erhöll en köpare skydd mot säljarens borgenärer genom köpeavtalet, i enlighet med avtaThe purpose of this essay is to throw light upon the complexity of the branch of law as regards the Swedish law of property and inquire whether the advantages of the doctrine of consensus exceed the benefits of maintaining the existing doctrine of traditio. The doctrine of traditio has existed in Swedish law since the 19th century. Before that, the buyer obtained protection against the seller’s cr

The purpose of this master’s thesis is to provide a contribution to the research body regarding consumer returns, particularly within the online fashion retail industry. A quantitative data analysis approach is chosen and two main methods are used: data study that aims to identify patterns and interesting relationships in the data, and a simulation study that uses real input data to attempt to ide

Geovisualiseringsverktyg är datamiljöer av geografiska data och presenterar vanligtvis kartor i antingen 2D eller 3D. Dessa kartor kan till exempel representera stadsmiljöer, vägnät eller vandringsleder. Geovisualiseringsverktygen blir kontinuerligt mer detaljerade och datadrivna. Samtidigt blir de också mer interaktiva. Det är till exempel möjligt att klicka på objekt, zooma in och ut, och lägga Geovisualization tools are continuously becoming more complex. These tools can present vivid and highly accurate representations of the real world. Simultaneously, spatial data is becoming incredibly detailed and the possibilities of interacting with the geovisualization tools are plentiful. Geovisualization tools are indeed powerful. However, in contrast to the well-developed technological side o

Du vaknar på morgonen kollar på din mobiltelefon om det hänt något nytt och spännande, tar datorn med dig till jobbet eller plugget och efter en lång dag sätter du dig i soffan och slår på Tvn. Alla dessa prylar har en central roll i vår vardag och är baserade på en gemensam nämnare som möjliggjort detta– transistorn. I din mobiltelefon finns det ungefär 200 miljarder av dem, i datorn ännu fler. TWith the transistor being the workhorse in modern electronics it has been vastly improved since its invention. However, the previous go-to improvement method of scaling it down has reached a dead end. Power dissipation has become a large concern and is in need of a solution. In the pursuit of further improving the transistor structure and its performance new approaches are being evaluated. A very

Under första delen av 1900-talet ägde ett normskifte rum i den juridiska världen. Uppsatsen belyser den kvinnliga kampen för högre juridiska utbildningar och befattningar. Denna kamp har varit utdragen, och kvinnornas rättigheter har inte varit självklara. Syftet med uppsatsen är att undersöka varför det tog så lång tid för kvinnorna att få rättigheterna till högre juridiska utbildningar och tjänsDuring the first part of the 20th century a norm change took place in the legal world. The thesis highlights the female struggle for higher legal education and positions. This struggle has been long, and women’s rights have not been self-evident. The aim of the thesis is to analyse why it took so long for women to gain the rights to higher legal education and positions and why Akademiskt bildade k

Idag säljs annonsplatser på hemsidor i allt större utsträckning via realtidsauktioner. Ofta tar det mindre än 100 millisekunder att auktionera ut en annonsplats från det att en användare besöker en hemsida. För någon som vill köpa annonsplatser innebär en effektiv köpstrategi således användandet av algoritmer; mer specifikt krävs snabba algoritmer. Under de senaste två, tre åren har försök gjorts Real-time bidding is getting increasingly popular for buying and selling online display advertisement. This has spurred a research interest into how to design optimal bidding algorithms, with advances during the last two to three years focusing heavily on reinforcement learning. This thesis focuses on creating bidding agent using recent innovations in combining reinforcement learning and deep lear