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The physics of interacting many-body systems is a very complex and challenging subject. Therefore one in general needs to use simplified models and approximate methods for studying these systems theoretically. In this work we study the exchange-correlation (xc) potential for the Hubbard-Holstein (HH) model for the application of Density Functional Theory (DFT) to the same. The Hohenberg-Kohn theo
The Seebeck coefficient, a key parameter describing a material's thermoelectric performance, is generally difficult to measure, and no intrinsic calibration standard exists. Quantum dots and single electron tunneling devices with sharp transmission resonances spaced by many kT have a material-independent Seebeck coefficient that depends only on the electronic charge and the average device temperat
Abstract in UndeterminedIn this article we describe Professor, a new program for tuning model parameters of Monte Carlo event generators to experimental data by parameterising the per-bin generator response to parameter variations and numerically optimising the parameterised behaviour. Simulated experimental analysis data is obtained using the Rivet analysis toolkit. This paper presents the Profes
Large particle accelerators are difficult to setup. One of the first problems that can be encountered, before production configuration is found, is the beam not passing through the accelerator. The process of guiding the beam through the accelerator is called beam threading. Depending on the accelerator complexity it can take days before the beam passes for the first time. Currently the beam thre
Using the 3D finite element tool COMSOL a III-V FinFET was mod- eled based on Cezar Zota, Erik Lind and Lars-Erik Wernerssons work. Using this model, the gate-source parasitic capacitance, the gate-drain parasitic capacitance, the source and drain resistances were simulated. Changing the geometry of the FinFET was done in order to optimize the transistor in regard for the transition frequency and
Studies of the Milky Way including how it formed and evolved through time are the key to understanding how other galaxies behave. The Milky Way is the most convenient galaxy to study, because the close proximity of stars means astronomers can collect precise spectral and dynamical data from individual stars. By combining the chemical and dynamical aspects, it is possible to pinpoint stars which ha
In my bachelor project I have worked with some-thing I call “Clothes in the middle phase”. I focused on how people treat their clothes that are not newly washed, but still not ready for the washing machine. I have selected to work with people who tend to pile up their clothes on the floor, bed or another temporary place that can easily create a messy atmosphere in the room. A common behaviour is
I had the opportunity to work with the flood plain community: Nossa Senhora das Gracas in the Amazon in Brazil. During a month long stay I observed the daily life of the people. A life where the inhabitants shape their daily routines after the rising and dropping Solemoes river. Solemoes is a part of the Amazon river. I identified a need of harvesting water during the low water season, when the r
Many of the finalists selected for the NIST post-quantum cryptography project are lattice-based and rely on a Learning With Errors problem (LWE). To solve such a problem, it is possible to implement a primal attack or a dual attack. In this context, Guo and Johansson as well as the MATZOV center have both proposed an improved dual attack against several NIST lattice candidates. The goal of this t
Methodology: The study is conducted as a qualitative research, where empirical data has been collected through semi-structured interviews with Swedish new ventures. The study does further take an abductive approach in terms of the theoretical viewpoint and research perspective. Theoretical perspective: The study is based on previous research about the early phases of new ventures, the importance
This essay examines the arguments laid forth by the European Union regarding restrictive measures imposed on the Russian Federation, concerning the illegal annexation of the Crimean peninsula, in an effort to evaluate and classify these grounded in the Toulmin model of arguments and Giumelli’s concepts of Con-straining, Coercing and Signalling. By assessing the arguments made by four EU institutio
We review recent progress and motivate the need for further developments in nuclear optical potentials that are widely used in the theoretical analysis of nucleon elastic scattering and reaction cross sections. In regions of the nuclear chart away from stability, which represent a frontier in nuclear science over the coming decade and which will be probed at new rare-isotope beam facilities worldw
Bicelles are disk-shaped models of cellular membranes used to study lipid–protein interactions, as well as for structural and functional studies on transmembrane proteins. One challenge for the incorporation of transmembrane proteins in bicelles is the limited range of detergent and lipid combinations available for the successful reconstitution of proteins in model membranes. This is important, as
The Amit conjecture about word maps on finite nilpotent groups has been shown to hold for certain classes of groups. The generalised Amit conjecture says that the probability of an element occurring in the image of a word map on a finite nilpotent group G is either 0, or at least 1/|G|. Noting the work of Ashurst, we name the generalised Amit conjecture the Amit–Ashurst conjecture and show that th
Reflections on ongoing work on the interactions of welfare, planning and landscape, based on a session at the 2021 ECLAS conference.
