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Recently, a new formalism for calculating the Green function of many-particle systems was introduced, in which the self-energy is replaced by a dynamical exchange-correlation potential. The dynamical exchange-correlation potential is an exact generalization of the Slater Xalpha exchange potential proposed in 1951, which includes the effects of correlations. It may be regarded as the counterpart of
Elektromagnetiska vågor är svåra att förklara men enkla att uppleva. Det är de fotoner som träffar våra näthinnor som gör att vi ser saker. Radion plockar upp dessa för att spela nyhetsmorgon, och när wifi:t är söligt, så är det avsaknaden av dessa vågor från routern som besvärar oss. I synnerhet är det sista exemplet något som har sett stor utveckling de senaste seklen. Den första elektriska telThe need for speed in communications systems is increasingly prevalent in modern society, which is one of the driving factors for the evolution of new technologies. At the forefront of this evolution are Multiple-input Multiple-output (MIMO) systems. Through the usage of many antennas at the base station (BS) and user equipment (UE), significantly enhances the potential maximum data transfer rates
Behavioural finance is crucial for ensuring the soundness and stability of financial markets, as it concerns all actors from individual investors to regulatory institutions. This study quantifies the effect of three biases related to Prospect Theory, a model famously introduced by Kanheman and Tverksy (1979) which explains human behaviour under risk. The biases in question are loss aversion, the r
Outnorth, a large Swedish Outdoor e-commerce retailer, is experiencing issues with lacking supplier performance, such as late deliveries and insufficient information. Concurrently they strive to strengthen their relationships with suppliers. In this study, a supplier performance measurement system, SPMS, is created to help Outnorth deal with supplier issues and facilitate communication and relatio
Syftet med denna studie var att undersöka hur äldre personer framställs som offer i morgon- och kvällspressen i Sverige. Syftet var vidare att diskutera vilken inverkan medias framställning har på både individer och samhället. Med hjälp av den kvalitativa innehållsanalysen har 82 tidningsartiklar analyserats. Resultatet visade på att äldre ofta skildras som ideala offer och att åldern hade stor be
Patientlyftar och passiva lyftselar används när en person inte kan förflytta sig. Typiska förflyttningar sker från en säng eller rullstol till en hygienstol för att använda toalett eller dusch. Patientlyften styrs av vårdpersonal, ofta undersköterskor, och förflyttningarna är komplexa och en högriskuppgift inom vård och omsorg. Lyftselar har ofta långa remmar som fästs vid en lyft. När remmarna loPatient lifts and passive lifting slings are used when a person is unable to move. Typical patient transfers are from a bed or a wheelchair to a hygiene chair to use a toilet or shower. The patient lift is controlled by healthcare professionals, often assistant nurses, and the transfers are complex and a high-risk task within clinical care. Patient lifting slings often have long straps that attach
Purpose: To investigate whether the issuance of green bonds has a positive impact on corporate value. Methodology: Utilizing a comprehensive dataset of 1684 non-financial A-share listed companies from 2014 to 2022, the study employs a multi-period difference-in-difference model, parallel testing, heterogeneity analysis, and mechanism testing. Tobin’s Q is used as dependent variable, post*treat is
This master’s thesis explores the effects of artificial intelligence (AI) in professional services firms (PSFs) through an exploratory case study research approach. By examining an architecture firm and a management consulting firm, this study investigates how AI influences both organizational and operational dynamics within these sectors. The research reveals that AI significantly enhances workfl
Plant-based diets have become increasingly popular as a mainstream lifestyle choice, reflecting broader societal values and an interest in ethical consumption and environmental consciousness. Social media plays an important role in popularizing plant-based diets, serving as a channel for information sharing. However, while existing literature acknowledges the link between social media and plant-ba
The decrease in fertility rate has become an increasingly pressing matter worldwide. This research employed the Copenhagen School-rooted theory of securitization in analyzing the discourse on falling fertility rates within South Korea’s defense white papers from 2012 to 2022. In contrast to the mainstream security studies, the argument is that state-specific fertility rates can be considered a thr
Prostitution har länge varit ett omdebatterat ämne där den internationella diskursen kring prostitution tagit två olika hållningar med skilda uppfattningar kring förekomsten av frivillighet inom sexhandeln. Denna diskrepans är framförallt tydlig mellan den liberala och abolitionistiska ideologin kring frivillighetsgraden hos prostituerade individer, samt gällande huruvida dessa kan anses vara offe
