Search results

Den här studien har skapats för att effektivisera analysen av tabletter innehållande den aktiva substansen nikotin på Kenvue. Nuvarande teknik för att analysera nikotinhalten i 2 och 4 mg tabletter är vätskekromatografi (UHPLC), en tidskrävande teknik som kräver provupparbetning. Near infrared (NIR) spektroskopi är en snabb analysteknik som är icke-destruktiv och kräver ingen provupparbetning vilkA study has been created to develop a method quantifying the active pharmaceutical ingredient (API) nicotine in tablets with near infrared (NIR) spectroscopy using chemometrics. The current technique, liquid chromatography (UHPLC), used to determine the nicotine content in tablets is time consuming and require sample preparation. NIR spectroscopy is non-destructive and the implementation of NIR sp

Övergödning är ett pågående problem i Östersjön och tas upp i bland annat the Baltic Sea Action Plan och inom ramen för Sveriges miljömål. Övergödningen beror på tillförsel av näringsämnen som kväve och fosfor, vilka når havet från flera olika källor. Dels från punktkällor som industriutsläpp och dels från mer diffusa källor som förbränning av fossila bränslen, skogsbruk och jordbruk. Från jordbruEutrophication is an ongoing problem in the Baltic Sea and is therefore found as a topic of the Baltic Sea Action Plan as well as the environmental goals of Sweden. One source to eutrophication is the leakage of phosphorus from agricultural lands. This study was aimed to map risk areas of phosphorus leakage from surface runoff in a catchment located in the southern parts of Sege river, Scania. The

It has been argued that cognitive biases are the source of a range of problems in modern society, from stereotype formation to belief in pseudoscience. One of those biases causes people to perceive causal relationships between unrelated events and is known as illusion of causality. Scientists are pointing to the importance of strategies to debias people on a global scale. However, research on effe

The paper investigates data on purchasing price of wheat from Swedish grain buyer Lantmännen and MATIF future contracts on milling wheat in an attempt to replicate the conditions for a Swedish farmer trying to manage his risk on wheat by trading future contracts on the MATIF exchange. Two static linear regressions and four dynamic GARCH models are employed on a sample of 1679 daily returns and 339

Forecasting stock market returns is an interesting topic since more and more Swedes enter and invest in this market. Theory implies, however, that such exercises should be impossible. The aim of this thesis is to investigate the possibility to forecast future stock returns by looking at macroeconomic variables’ history. The study is limited to the Swedish market as it is based on the OMXS30-index

Electrocardiogram (ECG) is an important tool for diagnosing myocardial infarction (MI), but analyzing the ECG signals can sometimes be difficult for physicians. Machine learning could potentially help provide a fast and consistent interpretation of ECG signals. This study aims to evaluate the performance of different machine learning models for classifying MI using ECG data from the PTB-XL dataset

Abstract In this study I have sought to understand the conditions for knowledge and objectivity in family assessment-work. I have used a philosophical theory to reach understanding of what possibilities and obstacles there are for an assessor in trying to reach knowledge about, and to be objective in, working with child and family-assessment. To fulfill my purpose I have made one group- and one s

The slope of the active distances is an important parameter when investigating the error-correcting capability of convolutional codes and the distance behavior of concatenated convolutional codes. The slope of the active distances is equal to the minimum average weight cycle in the state-transition diagram of the encoder. A general upper bound on the slope depending on the free distance of the con

The outstanding success of structural biology within the last two decades is closely related to the development and evolution of macromolecular crystallography (MX) beamlines. Indeed, many of today's synchrotron-based MX experimental sessions aim for fast but rigorous evaluations and data collections from very large numbers of samples [1–7]. To facilitate this, sample changing on most MX beamlines

Despite widespread research on the interaction rules that drive group-living behavior in animals, little is known about the spatial self-organization of individuals in heterospecific groups. This has led to significant challenges in teasing apart the various mechanisms thought to underpin multispecies groups. One potentially useful approach for gaining an understanding of this process is to identi

Ship-generated waves were investigated in the Gota alv river, which is a major waterway on the Swedish west coast between the sea and Lake Vanern. Ships with a typical size of 85x15x5 m (lengthxwidthxdraft) travel at speeds between 5 and 10 knots, generating waves that cause sediment transport and erosion along the river bed and banks. Field measurements of the wave properties and turbidity were c

Acoustic comfort has been used in engineering to refer to conditions of low noise levels or annoyance, while current standardized methods for airborne and impact sound reduction are used to assess acoustic comfort in dwellings. However, the results and descriptors acquired from acoustic measurements do not represent the human perception of sound or comfort levels. This article is a review of labor

Experimental studies are carried out to investigate the heat transfer performance of six different arrangements of truncated ribs in internal cooling channel by fixing the Reynolds number. The convective heat transfer mechanisms of the considered cases are detailed and analyzed based on the fluid flow characteristics by using three dimensional numerical simulations. The results show that among six