Filetype
Investigating the optical properties of various chemical compounds using UV-vis spectrophotometers is an essential part of education in chemistry. However, commercial spectrophotometers are usually treated as "magic black boxes", where the dominant majority of optical elements are hidden "under the hood". This often limits understanding of the mechanisms behind the generation of spectral curves, w
Time-resolved analysis of photon cross-correlation function g(2)(τ) is applied to photoluminescence (PL) of individual submicrometer size MAPbI3 perovskite crystals. Surprisingly, an antibunching effect in the long-living tail of PL is observed, while the prompt PL obeys the photon statistics typical for a classical emitter. We propose that antibunched photons from the PL decay tail originate from
Uncertainty refers to any limitation in knowledge. Identifying and characterizing uncertainty in conclusions is important to ensure transparency and avoid over or under confidence in scientific assessments. Quantitative expressions of uncertainty are less ambiguous compared to uncertainty expressed qualitatively, or not at all. Subjective probability is an example of a quantitative expression of e
Objective: To assess whether adding prostate volume to the kallikrein panel improves discrimination for ISUP Grade Group 2 or higher (GG2+) disease, as some men may have volume measurements available at the time of blood draw. While prostate volume predicts biopsy outcome, it requires an imaging procedure for measurement. The four kallikrein panel - commercially available as the 4Kscore - predicts
We study experimentally and with wave optics modelling the absorption of light in CsPbBr3perovskite nanowire arrays fabricated into periodic pores of an anodized aluminum oxide matrix, for nanowire diameters from 30 to 360 nm. First, we find that all the light that couples into the array can be absorbed by the nanowires at sufficient nanowire length. This behavior is in strong contrast to the expe
Efficient scheduling is vital for railway maintenance, which is increasingly challenged by rising train traffic and infrastructure wear. Trackwork often necessitates the reduction of train speeds and the partial or complete closure of tracks. Despite advancements in maintenance technology, the efficiency of planning processes, especially the repetitive tasks of planners and the adaptation to unfor
Introduction: Cold exposure alters muscular function. Muscle cooling influences the neuromuscular activation during maximal isometric voluntary contractions (MVC) and the amplitude of surface electromyography (sEMG) [1],[2]. It also slows down the mechanical process during contraction [3]. The purpose of this study was to investigate the effects of local cooling in cold water at 10 °C for 20 min i
With the explosive growth of communication traffic, increasing the modulation bandwidth of semiconductor lasers has attracted significant attention. However, after rapid progress is achieved, further increasing the modulation bandwidth of semiconductor lasers is hampered by the slow charge-carrier dynamics. Here, a room temperature, single-mode perovskite nanolaser with sub-picosecond pulses, enab
Background. Ruling out acute myocardial infarction (AMI) in the emergency department (ED) is challenging. Studies have shown that a high-sensitivity cardiac troponin T (hs-cTnT) <5 ng/L or <6 ng/L at presentation (0 h) can be used to rule out AMI. The objective of this study was to identify whether an even higher hs-cTnT threshold can be used for a safe rule out of AMI in the ED. Methods. The deri
Very few records written by black Caribbean women in the 1800s exist in the archives. An exception to this are three letters written by Ann M. Beaudhuy, born on St Croix around 1812. She came from humble circumstances and worked for many years as a nanny for a white Danish family, the Rothes. The head of the family, Louis Rothe, held a high position in the colonial administration. However, when he
Water is the matrix of life, and its confinement in nanocavities is a central topic from geophysics to nanotribology. Phyllosilicate layered minerals provide natural nanocavities for water due to their capacity to hydrate by confining water molecules in the interlamellar space. However, the hydration of phyllosilicates at the nanoscale is not a fully understood process and depends on the geologica
Biodiversity was during the 1990s perceived as 'green gold'. With the emergence of the biotechnology industry, biodiversity prospecting, or bioprospecting, was perceived to provide opportunities to gain benefits for several purposes. Benefits would attribute towards conservation, development of source countries, new medicines, profits for the industry and welfare to local providers of biog
Den här fallstudien undersöker hur Rädda Barnen arbetar opinionsbildande i sin kampanj för att få hem de svenska barnen med föräldrar som har IS-kopplingar från Syrien. Studien har gjorts i syfte att få förståelse för hur Rädda Barnen använder sig av medier för att bedriva sitt kampanjarbete och sätta sig själva och de frågor de bedriver på agendan. Vi har genomfört en studie där vi analyserat fle
Botswana’s reputation as a beacon of fiscal prudence in resource-rich economies faces new challenges. Yet recent pressures – rising debt, declining surpluses, and fiscal volatility – raise questions about the long-term sustainability of this model. This thesis examines how Botswana’s fiscal capacity has shaped its ability to manage natural resource wealth between 1990 and 2022. Drawing on a compos
This thesis explores some of the possibilities of demand side optimization in online advertising, specifically how to evaluate and bid optimally in real time bidding. Theory for many types of optimizations is discussed. The thesis evaluates auctions from a game theory and control theory perspective. It also discusses how big data sets can be used in real time, and how agents can explore unknown st
In this thesis the heating area of a belt furnace for annealing metal powder has been modeled. The model was extended with PI-controllers for controlling the energy added to the model. It was simulated with differently tuned controllers to test tuning principles for finding suitable control parameters for the process. The most promising tuning principles was then written as a manual with the aim f
The purpose of this bachelor thesis is to gain a deeper understanding of how Turkey has dealt with freedom of expression. This study analyzes two court cases in which the European Court of Human Rights determined that Turkey failed in its obligation to protect the freedom of expression of two of its citizens, Hrant Dink and Selahattin Demirtaş. The study begins by analyzing the merits of the cases
The Safe Driving Test (SDT) is a software test performed in a real vehicle where the software is flashed to an ECU and connected to the CAN network in the vehicle. The test driver then conducts different driving scenarios according to the test instructions of the SDT. All the data during testing is logged and then evaluated manually by a test engineer. The entire process including testing, evaluat
