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Inspired by the flow description of su(N) colour calculations, we recently showed how to simplify the spinor-helicity formalism (at the algebra level two copies of complexified su(2)) by treating each Weyl spinor as part of a flow line with definite chirality and momentum. This formalism, dubbed the chirality-flow formalism, eliminates all non-trivial algebra from tree-level spinor-helicity calcul
In order to investigate the characteristics of gas-liquid two-phase flows in horizontal mini circular tubes with inner diameters of 3.14 and 6.68 mm, a prism is adopted to improve the light path in the visualization experimental setup. The front and top views of air-water two-phase flow patterns in two tubes are captured synchronously based on the improved method. Three-dimensional gas-liquid inte
We propose a novel analytical time-domain model for migration of Raman scattered photons in inhomogeneous two-layer diffusive media. Based on this model, the methods for reconstruction of the Raman spectra of the two layers are developed, tested in simulations and validated on phantom measurements data.
Background: Fitness costs imposed on bacteria by antibiotic resistance mechanisms are believed to hamper their dissemination. The scale of these costs is highly variable. Some, including resistance of Staphylococcus aureus to the clinically important antibiotic mupirocin, have been reported as being cost-free, which suggests that there are few barriers preventing their global spread. However, this
As urban areas expand rapidly worldwide, wildlife is exposed to a wide range of novel environmental stressors, such as increased air pollution and artificial light at night. Birds in highly polluted and/or urbanized habitats have been found to have increased antioxidant protection, which is likely important to avoid accumulation of oxidative damage, which can have negative fitness consequences. YeAs urban areas expand rapidly worldwide, wildlife is exposed to a wide range of novel environmental stressors, such as increased air pollution and artificial light at night. Birds in highly polluted and/or urbanized habitats have been found to have increased antioxidant protection, which is likely important to avoid accumulation of oxidative damage, which can have negative fitness consequences. Ye
Geological time is by many geoscience instructors considered a threshold concept for geoscience students, being a central concept for how we experience geosceince phenomena that takes place on a spatio-temporal scale ranging from micro (e.g. cloud formation) to macro (e.g. plate tectonics). If one wishes to understand geoscience phenomena that goes beyond human perception, one must move from the cGeological time is by many geoscience instructors considered a threshold concept for geoscience students, being acentral concept for how we experience geosceince phenomena that takes place on a spatio-temporal scale rangingfrom micro (e.g. cloud formation) to macro (e.g. plate tectonics). If one wishes to understand geoscience phenomenathat goes beyond human perception, one must move from the conc
Life-history theory predicts that increased current reproductive effort should lead to a fitness cost. This cost of reproduction may be observed as reduced survival or future reproduction, and may be caused by temporal suppression of immune function in stressed or hard-working individuals. In birds, consideration of the costs of incubating eggs has largely been neglected in favour of the costs of
This paper analyzes the multi-period base-stock problem where there is a financial risk associated with a stochastic demand. For the single-period problem, it is known that the optimal inventory policy can be obtained with the Black and Scholes option pricing formula. This paper pushes the analysis further by applying the options valuation framework to the multi-period problem and presenting an al
In digital integrated circuits, memories are often a limiter for main performance, power and area. Over the past decade, integrated memories have gained dominance in terms of area and power cost. In applications like machine learning or image processing the area share can be above 80% consuming more than 50% of the total power budget. On-chip memories in CMOS technologies can be categorized as sta
Titel: Kvinnor, hjälper eller stjälper de kreditbetygen? En kvantitativ studie om hur kvinnor i styrelser påverkar företags kreditbetyg Seminariedatum: 2021-01-15 Kursnamn: FEKH89, Examensarbete i Finansiering på kandidatnivå, 15hp. Författare: Sofie Mattsson, Oscar Pålsson, Frida Rosén Handledare: Anamaria Cociorva Nyckelord: kreditbetyg, kvinnliga styrelseledamöter, S&P Global Ratings, EuropTitle: Women, do they help or hurt corporate credit ratings? A quantitative study on how women on boards affect corporate credit ratings Seminar date: 2021-01-15 Course: FEKH89, Degree Project in Corporate Finance, Undergraduate level, 15 ECTS-credits. Authors: Sofie Mattsson, Oscar Pålsson, Frida Rosén Advisor: Anamaria Cociorva Key words: credit rating, women on board, S&P Global Ratings, E
Examensarbetets titel: Låga räntor och höga utdelningar - En studie om påverkansfaktorer på svenska fastighetsbolags kapitalstruktur Seminariedatum: 3 juni 2020 Ämne/kurs: FEKH89, Examensarbete i finansiering på kandidatnivå, 15 högskolepoäng. Författare: Fredrik Huitfeldt, Jakob Nilsson och Emelie Persson. Handledare: Göran Andersson. Fem nyckelord: Fastighetsbolag, Kapitalstruktur, PåverkansfaktTitle: Low interest rates and high dividends - A study of influencing factors on Swedish real estate companies' capital structure Seminar date: June 3 2020 Course: FEKH89, Degree Project Undergraduate Level Business Administration, Undergraduate Level, 15 University Credits Points. Authors: Fredrik Huitfeldt, Jakob Nilsson och Emelie Persson. Advisor/s: Göran Andersson. Key words: Real Estate
This thesis analyzes how digitalization in elderly care affects cost-efficiency and quality of care. More specifically, digitalization in elderly care is divided into welfare technologies and E-services. The study goes into how well digitalization meets its promises of solving many of our society's future problems regarding elderly care, such as an aging population. In order to analyze this, I
Using a new concept—the law of the limit to land productivity—this article builds a three (physical, economic, and institutional) worlds’ land-use model with inverse logics of different development stages in a time perspective: before, in, and after the population trap. This model extends the span of the Malthusian population model to history after the Industrial Revolution and makes static proper
An emerging trend among manufacturing companies in Sweden is “offshoring of research and development (R&D)”, which means knowledge sourcing from low-cost countries. There is a substantial and growing pool of high-skilled people in low-cost countries, resulting in companies increasingly going to where the talent is. However, management and implications of R&D offshoring are not sufficiently
During the transitional period, most listed companies in China chose historical cost accounting rather than fair value accounting. According to our empirical test, share market, industry, size, auditing firm and foreign list are significant factors to explain the accounting choice while both of ownership and financial difficulties variables have no significant relationship with the accounting choi
Tubular ceramic membranes with many, small-diameter feed flow channels have the advantage of being less costly per unit membrane area. For this reason, membranes with many small channels are often favored over those with fewer larger channels. We have theoretically studied how the diameter of the feed flow channels influences the frictional pressure drop, the membrane performance (flux and retenti
Talking about inclusion in the workplace is an emerging concept, and the pressure of committing to work with it rests on the companies. The research conducted around inclusion is growing, and there are different suggestions as to how to define and work with the concept. Moreover, companies are lacking evidence to support how to successfully measure it among employees. By exploring inclusion in a s
Data inom hälsovården kan användas för att hitta mönster för att exempelvis ta fram hur många som är sjuka, eller hur många som har fått ta blodprov. Det används ofta statistiska modeller för att göra undersökningar, men i detta projektet används artificiell intelligens, och mer specifikt neuronnät. Då tar vi hjälp av artificiell intelligens för att hitta mönster inom datakällor som kan vara svåraOutlier detection in high-dimensional data is a complex task, useful in many fields. One major application is in healthcare, where the high-dimensional healthcare registers can be used to detect patterns related to the medical behaviour and state of the population. In this project, neural network based autoencoders were used to study the Covid-19 vaccination campaign, where it was trained on healt
