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Det här examensarbetet ger en översikt över organiskt material (kerogen) i Jordens yngre lagrade berggrund och hur detta material omvandlats till olja och naturgas genom olika geologiska processer. De viktigaste är tryck, temperatur och tid. Med fortskridande sedimentpålagring förs det organiskt rika sedimenten successivt ned på större djup, där de genomgår en så kallad mognadsprocess till följd aThe origin, composition and maturity of kerogen, and its conversion to petroleum is reviewed. Various methods for estimating the maximum temperature to which kerogen and potential source rocks were subjected are also reviewed. Several kerogen maturation parameters can be distinguished and grouped into two categories: chemical paleothermometres and biological paleothermometres. Biological paleother

The aim of the present study was to take a closer look into the evidence for a theory of prehistoric string manufacture, formulated by the British archaeologist Karen Hardy in the article Prehistoric string theory. How twisted fibers helped to shape the world (Hardy, 2008). A problem with the article, with the relevance and validity of the presented evidence as substance for the theory, was the mi

Recent trends of permafrost thawing in the subarctic are expected to cause increased release of dissolved organic carbon (DOC) to inland waters, which might have cascading effects on downstream aquatic ecosystems and release of CO2 to the atmosphere. This study therefore aimed at evaluating the applicability of an empirical band ratio algorithm for estimating chromophoric dissolved organic matter

As previous research on content-specificity of the neural correlates of recollection is inconclusive, event-related potentials were used to assess old/new effects for faces, objects and words. The data demonstrate temporal differences in ERP old/new effects as a function of item type, supporting the notion that material-dependent processes underlie recollection-related neural activity. The results

We test a new approach to calculate the mean velocity and velocity dispersion for a sample of nearby stars when their radial velocities are not available. The most commonly used method (here called the projection method, PM) was introduced in a paper by Dehnen & Binney (1998). That method is here compared, theoretically and numerically, with an application of the Maximum Likelihood (ML) method

Flooding in oil palm plantations in Southeast Asia is a common problem. The oil palm’s habitable range is restricted to lowland equatorial areas, and the high rainfall and degraded landscapes associated with oil palm cultivation leaves oil palm prone to flooding. Flooding diminishes yields in mature palms, increases mortality in young palms, and disrupts operational processes. This reduces the ec

In October 2022, the European Commission announced a legislative proposal to make instant payments in euro available to all citizens with a bank account in the EU and EEA countries. When adopting new payment technologies, it can be challenging to balance security and convenience. Consideration must be given to whether compromised security is an unavoidable effect of instant payments or if both obj

This study investigates interculturality in health communication and deriving power relations. The Bilharzia Storytelling Lab 2022 in Kigali is a health communication program devoting significant attention to the role of culture and representing a new approach to respectful health communication practices. Exploring the Storytelling Lab methodology and its roles provides insights into the innovativ

This master’s thesis investigates the possibility of a new de-air concept for BorgWarners hydraulically actuated torque transfer couplings. De-airing of the hydraulic system is required to minimize the compressibility and ensure low response times. The current de-airing solution works well but limits the usable torque range of the couplings and produces a lot of noise. To meet increasingly demandi

Credit activity is essential for financial institutions, acting as the primary means banks deploy resources and generate revenue. As a key indicator of financial distress, corporate default has severe repercussions on investors, creditors, regulators, and policymakers. Credit risk embodies the uncertainty banks confront prior to lending, accounting for the partial or complete non-recovery of loan

The establishment of Indonesian AID can be seen as Indonesia’s official statement to the world on its intent of playing a more prominent role as a donor of international development aid. However, looking at the available data, it seems that Indonesian AID is still deep in the early days of its establishment. Little seems to have gone into “enforcing” its role as donor, with “reorganizing” seeming

Collecting enough labeled images to train an artificial neural network (ANN) is a common struggle since the process is tedious, time consuming and expensive. CellaVision, a company that creates analyzers that automate the process of finding and pre-classifying abnormal blood cells using machine learning, runs into this problem regularly. When new generations of analyzers are being produced, the im

The purpose of this study is to explore what organisational capabilities are needed to monetise on the value of a digital transaction platform during a business model transformation. The study brings forward six capabilities which are divided into the three themes: enable, create and capture. To enable value on the platform, the capabilities innovative mindset and supportive leadership are assumed

Att bygga material av proteiner är en konst som våra kroppar är specialister på. Men när vi medvetet försöker designa proteinmaterial, så blir det tydligt hur komplexa och svårstyrda biofysikens lagar är. Det här examensarbetet har som mål att lägga grunden för ett proteinmaterial som kan skapas eller dissociera som respons på förändrad Ca2+-koncentration. Om ett sådant material kan framställas meTo build materials of proteins is an art that nature is a specialists in. But when we actively try to design protein materials, it becomes clear how complex and hard to control the biophysical world is. This master thesis aims to lay the foundation for a protein material that forms and dissociates as a response to changed Ca2+ concentration. If such a material is to be produced with an ordered str

Execution time is an important issue in the field of numerical analysis. Simulations are getting more and more complex and the execution times are rapidly increasing. In the scope of this thesis a time integration library is used to solve initial value problems. The aim of the thesis is to implement and investigate two different approaches to decrease the execution time for the library. The main f

During evolution the human brain has increased drastically in size compared to that of other primates. However, little is known about primate brain development as it is difficult to study human and primate brains in the laboratory due to the scarcity of tissues. Yet, it is essential to study primate brains and understand the molecular features leading to the human brain’s unique cognitive function

Maturity-onset diabetes of the young (MODY) is a heterogeneous single gene disorder characterized by non–insulin-dependent diabetes, an early onset and autosomal dominant inheritance. Mutations in six genes have been shown to cause MODY. Approximately 15–20% of families fitting MODY criteria do not have mutations in any of the known genes. These families provide a rich resource for the identificat

An analytical procedure based on microwave-assisted extraction (MAE) and standard addition was applied for the determination of banned azo dyes in bovine, sheep, and goat leather. Standard addition at four different concentration levels was performed using azo dyes, dissolved either in methanol or water. All dyes were determined indirectly by measuring their corresponding harmful aromatic amines,