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Konsekvenser av samexistens Ett försök att förklara hur två undergrupper av samma art fluga samexisterar när hybrider mellan grupperna visar försämrad överlevnadsförmåga. Uttrycker de olika karaktärer för att undvika ogynnsamma parningar? Det försökte jag ta reda på genom att mäta olika karaktärer hos flugan Tephritis conura och sedan jämföra grupper mot varandra. Hur biodiversitet skapas är tiEcological speciation, where adaptation to novel ecological niches results in the formation of new species, requires divergent selection and a form reproductive isolation that keep diverged populations separate. To avoid that sexual recombination breaks up favourable associations between ecological traits and reproductive isolation, coupling of these traits is required, either through pleiotropy o

This report aims to communicate the process and result of the master’s thesis project that was accomplished at TePe Munhygienprodukter AB, with the title Development of a dental measuring instrument. The project had a timeframe of 18 weeks and consisted to a large extent of generating a foundation for developing a product that allows for simple measuring of interdental spaces. TePe develops denta

Den senaste tidens genetiska utveckling har medfört stora möjligheter att genom assisterad befruktning hjälpa naturen på traven för par som av olika anledningar inte kan få barn på naturlig väg. Man kan insemineras, ägg kan befruktas utanför kroppen och man kan använda sig av donerade ägg eller spermier. Man kan till och med hyra en livmoder. Möjligheterna ökar och fler och fler kan bli föräldrar The recent development in the area of assisted reproductive technology has entailed large opportunities to help childless couples to get pregnant. Today, women can get inseminated and their eggs can be fertilized outside their bodies. Donated gametes can be used and you can even rent a uterus. The possibilities are growing – but to what cost? Assisted reproduction means a deviation from the natur

Near-Infrared Spectroscopy (NIRS) has become popular in many research fields for the past two decades. NIRS technology uses near infrared light for measuring changes in the concentration of deoxygenated hemoglobin and oxygenated hemoglobin. Noninvasive near-infrared absorption measurements in tissue have many invaluable applications in the medical field. Today NIRS is a very attractive technique w

Avian migration is based on a genetically inherited, endogenous programme which encodes the spatio-temporal information necessary for naive individuals to perform their first migration. The mechanism responsible for the temporal aspect of migration includes both endogenous clocks and responses to external cues to generate timing programmes. Of all the external cues involved, photoperiod has the g

Batch high-shear mixers are used in a variety of different processing industries,such as the pharmaceutical, chemical and food industries. One company that utilize this type of mixers is Tetra Pak. High-shear mixers can be used for many different mixing scenarios, but only liquid-liquid mixing is discussed in the thesis. The batch high-shear mixer is constructed with a rotor-stator at the bottom o

The number of situations where both people and nature are harmed by human activities are increasing in the same pace as mankind is augmenting its control and so called 'development' of the Earth. Although previously much debated, we have passed the stage when protecting human rights and preserving the environment were seen as conflicting interests. Instead we have reached the conclusion th

Although lacking a commonly accepted definition, technical standards essentially refers to a set of technical specifications that enable compatibility among products. They may arise through formal standard-setting organizations, or sometimes simply from the market itself. Many of the products for which standards are of importance display network effects. Network effects designate the increasing va

Computer generated imagery is used in a wide range of disciplines, each with different requirements. As an example, real-time applications such as computer games have completely different restrictions and demands than offline rendering of feature films. A game has to render quickly using only limited resources, yet present visually adequate images. Film and visual effects rendering may not have st

Högestad utgör, med sina ca 13 000 ha, en del av Skånes största enskilda egendom med verksamhet inom jordbruk och skogsbruk, viltvård och fasigheter. Under våren 2006 inleddes ett samarbete mellan Högestad och Lunds universitet för en långsiktig hållbar utveckling. En del i samarbetet utgörs av tillgängligare information gällande forskningsresultat av t.ex. klimatförändringens påverkan av jordbrukHögestad is with an area of 13 000 ha one of the largest landowners in the southern part of Sweden (Skåne). In spring 2006, the collaboration between Högestad and Lund University for a long-term sustainable development was initiated. This collaboration comprises the easy access and transfer of information about new research results. These results include the effect of climate change on agriculture

En av de mest anmärkningsvärda förändringarna i Europas familjerätts-system är framväxten av rättsverkningar kopplat till samboskap. Denna utveckling har även under det senaste årtiondet följts av en snabb förändring av samhällsattityderna gentemot samkönade par vilket har lett till ökat rättsligt erkännande i många av EU:s medlemsländer. Ett område av EU-rätten som potentiellt skulle kunna påverkOne of the most remarkable changes in European family law systems is the development of new institutions that provide a legal status for unmarried couples. Over the last decade, this change has also been accompanied by a rapid evolution of social attitudes towards same-sex couples that has lead to legal recognition in many Member States of the EU. An area of EU law where such developments could ha

Denna uppsats jämför de lagstiftningstekniker som valdes av Sverige respektive Storbritannien för att implementera den del av Postdirektivet som omfattar de samhällsomfattande posttjänsterna och vilka resultat respektive land har uppnått. Den utvärderar även EU:s val av regleringsmetod. Motivet bakom Postdirektivet, som trädde ikraft 1997, var EU:s vilja att försäkra invånarna tillgång till samhäThis essay compares the different ways that Sweden and Great Britain respectively chose to implement the part of the Postal Directive that include the universal services and the results that have been achieved by each country. It also evaluates the EU's choice of regulatory approach. The motive behind the Postal Directive, which came into force in 1997, was the EU's desire to assure resid

Populärvetenskaplig sammanfattning: En mycket reaktiv spårgas i Amazonas. Växter släpper ut flyktiga organiska ämnen, som är mycket viktiga eftersom de släpps ut i stora mängder och påverkar tillverkningen av aerosoler, förändrar luftkvaliteten och fungerar som kommunikation mellan växter och herbivorer. Det här arbetet presenterar uppmätningar av sesquiterpener, vilka är flyktiga organiska partikSesquiterpenes are highly reactive terpenoids produced by vegetation and may serve many important biological functions such as acting as antioxidants and as semiochemicals (chemicals acting as messengers within or between species). Once emitted to the atmosphere, by reacting with oxidants like ozone and contributing to secondary organic aerosol formation, the emission of sesquiterpenes from vegeta

Simulation mimics the behaviour of real world processes or the system over time. It helps us to understand the impact of modification and the effect of introducing various interventions to a system. One such simulation method is known as Monte Carlo (MC) simulation, which has been utilized to evaluate the performance of digital communication systems over the last 70 years. MC has been the most ex

In many natural ecosystems, predation is well recognized as a strong evolutionary force, and predator-mediated selection has been demonstrated to induce changes in prey morphology, life history and behaviour. In my thesis, I have focused on behavioural responses in aquatic prey under the risk of predation. I have used two different species of prey, the guppy (Poecilia reticulata) from high and low

The influence of mass-transfer limitations on the performance of immobilized a-chymotrypsin operating in acetonitrile medium has been investigated. The enzyme was immobilized by deposition on various porous carrier materials such as celite, polyamides of different particle sizes, controlled-pore glasses, polypropylene or polyacrylamides. When carrying out kinetically controlled peptide synthesis r

This thesis contains two studies focusing on motivation in learning and teaching French as a foreign language in Sweden. In the first study, the effect of three specifically designed pedagogical activities on learners’ Ideal French Self (IFrS) and Intended Effort (IE) was examined in a group of 15-year-old Swedish pupils. No significant difference could be found between the two intervention classe

Aims. We report 20 new lithium-rich giants discovered within the Gaia-ESO Survey, including the first Li-rich giant with an evolutionary stage confirmed by CoRoT (Convection, Rotation and planetary Transits) data. We present a detailed overview of the properties of these 20 stars. Methods. Atmospheric parameters and abundances were derived in model atmosphere analyses using medium-resolution GIRAF

It is argued that we live in a post-industrial society with a transition from the production of goods to services. It is also said we live in a knowledge economy where creation, distribution, use and manipulation of information are significant activities (Dahlbom, 2003). The word industrial has a connotation of mass-production of products and, logically also industrial design has this connotation.