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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

OBJECTIVES: To identify the lowest sensitivity and specificity that physicians and the general population consider acceptable for medical artificial intelligence (AI), relative to current human performance.METHODS: In a nationwide, cross-sectional survey in Sweden, 2025, random samples of 500 physicians and 500 adults from the general population were mailed a questionnaire presenting three vignett

The optical response of gold-silver (Au-Ag) alloy nanoparticles is strongly influenced by their localized surface plasmon resonance (LSPR), which can be tuned by varying the particle composition. Accurate simulation of LSPR, often performed using Mie theory, critically depends on the choice of dielectric function, yet available datasets for gold, silver, and their alloys vary widely. In this work,

The fields of cultural tourism and heritage management are gaining attention for their potential to be better linked, particularly in terms of practical applications. This paper proposes a taxonomy of heritage resources and related heritage-based tourism types and their linkages for specific case study areas, building on the established product class approach in cultural tourism studies. The resea

A quantitative understanding of the hydro-environmental factors that influence the occurrence of agricultural drought events would enable more strategic climate change adaptation and drought management plans. Practical drought hazard mapping remains challenging due to possible exclusion of the most pertinent drought drivers, and to the use of inadequate predictive models that cannot describe droug

Considering the ever increasing financial damages of floods and the need to manage the surface water, the use of new and more sufficient methods seems to be necessary. Therefore, the present study aims to investigate capability of the Gamma, Beta, Chi-square, and Weibull probability distribution functions (PDFs) for flood hydrograph derivation. The present study was conducted in the Bar watershed,

Evaluating the repellency of essential oils against Tetranychus urticae requires robust methodologies to detect time-dependent changes in their efficacy, due to differential efficacy, volatility, and sustained effectiveness. This study introduces the Pole-dance bioassay, a novel no-choice method optimized for high-throughput screening of time-dependent repellency, demonstrated through tests on twe

Along with the gradually accelerated urbanization process, simulating and predicting the future pattern of the city is of great importance to the prediction and prevention of some environmental, economic and urban issues. Previous studies have generally integrated traditional machine learning with cellular automaton (CA) models to simulate urban development. Nevertheless, difficulties still exist

In this essay I discuss different normative foundations - theories of political ethics, for proposed cures to market failures. In addition to empirically match what cure fit what type of market failure, I posit the notion that the normative position of an economist, or policy maker, or of a group, concerned with these problems, delimits the options available for recommending, or analysing, what co

En av de stora utmaningarna inom den internationella handelsrätten idag är hur man ska kunna förbättra situationen för utvecklingsländer inom den internationella handeln. Denna uppsats belyser specifika undantagsregler, inom WTO-rätten, som har till ändamål att öka utvecklingsländers möjligheter att delta i den internationella handeln. Industriländer tilldelar utvecklingsländer, i enlighet med WTOOne of the current challenges within the field of international trade law is how to meet the special needs of developing countries and how to a greater extent include these countries in the world trading system. This thesis examines a particular set of exception rules that exist on behalf of developing countries. Developing countries are, in accordance with WTO law, granted different tariff prefer

Europeiska unionens (EU) huvudmålsättning är att fri rörlighet av varor, personer, tjänster och kapital ska råda inom unionen. Rättsenigheten inom EU har dock brister och det har observerats att det för en väl fungerande inre marknad hade varit behjälpligt med harmonisering av medlemsstaternas civillagstiftning. För detta ändamål har Europeiska kommissionen initierat utformningen av en gemensam reOne of the main goals of the European Union (EU) is to guarantee the free movement of goods, capital, services and people. Divergences in national contract laws are seen as an impediment to this free movement. To overcome this hurdle scholars clearly suggest that the internal market would benefit if the EU had harmonized the private law. The European Commission (EC) has therefore initiated the cre

The maturation of whisky is a long and complex process, the extremely long waiting time causes a large cost for new whisky distilleries, and without sufficient funding, it is hard to start a whisky business. To produce satisfying whisky products within the short term, accelerating the reaction during aging provides a promising approach. Various chemical reactions take place during this stage, this

The unicellular green alga of genus Chlamydomonas are well studied within the fields of photosynthesis and flagellar research. Although many molecular tools have been developed for use on Chlamydomonas, little research has been done on its ecology and population dynamics. Species within the genus are morphologically indistinguishable using light microscopy and as such a molecular method is necessa

I denna avhandling har jag kritiserat EPI (Environmental Performance Index) och det sätt ett lands hållbarhetspolicy tenderar att mätas. Jag har granskat tidigare bortsedda aspekter av nationernas miljöpolicy och försökt föra dem fram i hopp om att dessa kommer att användas för framtida miljömätningar. Jag har också tittat på sambandet mellan jämställdhet och statlig miljö och försökt hitta empiri

Based on the context of a developing country, this research engages key identified political-economy aspects that influence the operations and performance of the electricity supply industry in Tanzania. Departing from this political-economy perspective, this paper explores dencentralized approaches to rural electrification through agro-industry co-generation and influencing factors behind the slow