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This paper examines the effectiveness of corporate derivative hedging during crises and its impact on firm value. The study uses all 500 publicly listed companies in the S&P 500 Index from 2019 to 2024 as the sample, covering the COVID-19 pandemic shock in 2020–2021. This paper uses multiple regression analysis with HC1 heteroskedasticity-robust standard errors to test whether the pandemic sho

This thesis explores how Chinese students in Sweden navigate and reconfigure the practice of eating together in transnational and digital contexts. Drawing on the theoretical framework of commensality, community, and conviviality, it examines how students sustain shared eating practices amidst cultural differences, spatial constraints, and technological mediation. Through qualitative methods inclu

This study examines how corporate governance relates to firms’ sustainability as measured by ESG performance. I operationalize sustainability using the Bloomberg ESG Performance Score and its E/S/G pillars; all effects are therefore interpreted as changes in ESG-measured sustainability. I begin with firm-fixed-effects and year-fixed-effects panel regressions that link within-firm changes in CEO eq

The purpose of this study is to explore and visualize individuals’ personal experiences of the social work carried out by the social services. We have examined individuals’ opinions and feelings based on their experiences and contact with the social services. Through six qualitative interviews based on the Interpretive Phenomenological Analysis, we have analyzed the empirical data by applying Char

Chronic respiratory diseases (CRDs) are a group of incurable conditions, among which the most common, such as COPD and asthma, have significant negative impacts on patients’ mental health and economic productivity. Understanding of the causes and affected populations of CRDs is continuously evolving, with air pollution now recognized as an important etiological factor alongside smoking, receiving

Enligt kursplanen är syftet med detta projekt att närma sig och ta sig an arkitektoniska gestaltningsfrågor mot bakgrund av ett föränderligt och komplext samhälle. Grundinställningen är att arkitektur gör skillnad, och att den gör det därför att den är del av ett sammanhang som är större än sig självt. För att förstå hur dessa sammanhang verkar, tillämpar kursen ett processperspektiv på arkitektur

Bunch compressors in linear accelerators (linac) are magnetic devices used to shorten electron bunch length, and therefore, increase the peak current. MAX IV, located in Lund, Sweden, is a synchrotron light source facility that includes a linac containing two double-achromat bunch compressors, BC1 and BC2. Each bunch compressor consists of two identical arcs bent in opposite directions. As electro

I Fågelmara, ett kustnära område i Karlskrona kommun, innehåller grundvattnet i flera brunnar höga halter av klorid, vilket kan vara ett tecken på att saltvatten från Östersjön tränger in. Detta fenomen, kallat saltvatteninträngning, riskerar att förvärras i framtiden på grund av klimatförändringar, torrare år och sjunkande grundvattennivåer. Denna studie har undersökt kloridhalterna i åtta kommunSaltwater intrusion into coastal groundwater is an increasing concern due to climate change, as drought and declining groundwater levels can allow seawater to infiltrate groundwater aquifers. This study investigates chloride concentrations in eight municipal wells in Fågelmara, Karlskrona, from 2003 to 2025, and groundwater levels in wells nearby from 2019 to 2025, to assess signs of saltwater int

This study aimed to investigate and analyze prominent narratives within twelve YouTube videos published by a Swedish organization I have deidentified. It also investigated how social workers within child protective services in Sweden appear within the empirical material. The study leaned towards the following theories: The social constructivist theory and narrative theory, with terms created by Gé

This study aims to examine and compare attitudes towards drug-related problems, professional work with individuals experiencing such problems, and harm reduction interventions among professionals in social services and adult psychiatry in Malmö. The study is based on a quantitative cross-sectional design, with 150 respondents completing a digital survey that included three established instruments:

Partikelfysik är det fält inom fysiken som syftar till att förstå universums mest fundamentala byggstenar och de krafter som styr deras beteende. Standardmodellen är den teori som med stor framgång beskriver alla kända elementarpartiklar och deras växelverkningar, med undantag för gravitationen. Upptäckten av Higgspartikeln vid LHC 2012 markerade en viktig milstolpe för den moderna fysiken. Den beIn this thesis, a comprehensive on-shell renormalization scheme for the potential of the general CP-violating Two-Higgs-Doublet Model (2HDM) at one-loop level is presented. We derive and implement two schemes that are self-consistent and do not rely on a set of consistency equations to be valid. We focus on showcasing the effects of different renormalization schemes and their implications on physi

This study aimed to analyze women’s entry into organized crime and factors that complicate exiting these groups. This study is based on a qualitative approach and has been conducted using document analysis. Thematic analysis has been used to analyze eight transcribed podcast episodes where women share their experiences of being a part of organized crime groups in Sweden. To implement this study, w

Digitalisering av arbete omvandlar arbetslivet i stora delar av världen. Trots detta har få studier undersökt medarbetare inom HR-professionens uppfattning av sin yrkesroll och motivation i arbetet i förhållande till dessa förändringar. Syftet med studien var att undersöka HR-anställdas erfarenheter av och förväntningar på arbete med data-drivet beslutsfattande, och hur deras attityder och förhållDigitalization of work changes work life in large parts of the world. Despite this, few studies have examined employees within the HR-profession’s perception of their professional role, and motivation in their work in regards to these changes. The aim of the study was to examine HR-employees experiences of, and expectations on work with data-driven decision making, and how their attitudes relate t

Women in the humanities : scientific ideals during the second half of the 20th century This thesis examines scientific ideals of female humanists during the second half of the 20th century through the analytical concept scientific or scholarly persona. The aim with this thesis is to show how scientific ideals have been negotiated in the context of obituaries of female scholars active in the humani

Problem background and research problem: Previous research has shown that demographic characteristics of corporate executives can influence financial decision-making. According to Upper Echelons Theory, factors such as gender, age and experience play a role in shaping strategic decisions. However, research on the role of CFOs remains limited, especially within capital-intensive industries like the

Compressed air systems account for roughly 10 % of industrial electricity use, suggesting that even marginal gains in compressor efficiency yield substantial cost and emission savings. Although screw compressors are valued for their compact and reliable design, the process of optimizing the performance of a machine for a specific application is typically time-consuming due to manual testing under

Bathymetry, the measurement of underwater terrain, is crucial for understanding lake storage volumes, water resource availability, and ecological conditions. While there are an estimated 117 million lakes worldwide, bathymetric data remains limited for most of them. Traditional methods for measuring bathymetry requires fieldwork which is costly and time-consuming. For this reason, new less fieldwo

Syftet med denna studie var att belysa och utforska psykologers upplevelser av tidsbegränsad terapi. Tidsbegränsad terapi definieras på så vis att antalet sessioner är begränsade före uppstart av psykologisk behandling. Det övergripande syftet med studien är att belysa olika perspektiv av hur tidsbegränsad terapi påverkar psykologen i sitt arbete och behandling. Fem verksamma psykologer med olika The aim of this study was to explore how psychologists perceive time limited therapy. Time limited therapy is defined as restricting the number of sessions before the beginning of therapeutic treatment. The overall purpose of the study is to shed light on different perspectives in terms of how time limited therapy affects the therapist in their work and the treatment. Five psychologists with diffe

This thesis investigates how low-frequency ultrasound can enhance membrane filtration performance and reduce fouling, one of the most critical limitations of membranes in water treatment technologies. Two types of membranes were studied. Flat-sheet polyethersulfone (PES) membranes, widely used for their mechanical and chemical stability, and electrospun nanofiber membranes (ENMs) made from styrene