Sökresultat

We describe the setup and first results of an inverse modelling system for atmospheric N2O, based on a four-dimensional variational (4DVAR) technique and the atmospheric transport zoom model TM5. We focus in this study on the European domain, utilizing a comprehensive set of quasi-continuous measurements over Europe, complemented by N2O measurements from the Earth System Research Laboratory of the

Wildfires are a major driver of ecosystem development and contributor to carbon emissions in boreal forests. We analyzed the contribution of fires of different fire size classes to the total burned area and suggest a novel fire characteristic, the characteristic fire size, i.e., the fire size class with the highest contribution to the burned area, its relation to bioclimatic conditions, and intra-

OBJECTIVE: The Swedish Early Psoriatic Arthritis Register describes the course of early psoriatic arthritis (PsA) in a real life clinical setting in Sweden. The aim of this study was to obtain information on predictors of clinical outcomes over a 5-year period with special focus on effects of gender, joint patterns, diagnostic delay and initial disease activity. METHODS: In six centres, patients w

Popular Abstract in Swedish Företeelserna handledning och lärande har en diffus innebörd i vardagliga sammanhang, såväl som i utbildningssammanhang. Individer uppfattar företeelser och ord på olika sätt. Man ger dem en mening utifrån sin erfarenhet eller brist på erfarenhet. Denna studie belyser den mening som en grupp sjuksköterskestuderande och deras handledande sjuksköterskor ger handledning, sSwedish nursing education has its roots within a tradition of vocational training in clinical practice. Supervision is commonly used in the practical parts of the education. The aim of the study was to explore, describe and understand the content and meaning of supervision expressed by student nurses and their supervisors. A complementary aim was to analyse and report on the research process as a

Adaptive antenna systems (AAS’s) are traditionally of interest only in radar and sonar applications. However, since the onset of the explosive growth in demand for wireless communications during the 1990’s, researchers are giving increasing attention to the use of AAS technology to overcome practical challenges in providing the service. The main benefit of the technology lies in its ability to exp

Popular Abstract in Swedish Olika arter av stora växtätare lever på platser spridda över nästan hela jordklotet. På många av dessa platser samlar vi människor data för att kunna skatta storleken på deras populationer. Anledningen till att detta görs varierar från plats till plats, det kan till exempel vara för att djuren är utrotningshotade, för att kunna bedriva nöjesjakt eller för att begränsa aLarge herbivores are monitored for various reasons in many areas around the world. Data from such monitoring can be of varying degree of detail and extent. Several studies have shown that we need extensive amounts of data with a high degree of detail to be able to understand anything from it. Nevertheless, data in the less detailed form of annual censuses of large herbivore densities and weather i

On December 6-7, 2010, the International Desalination Association (IDA) presented its first Environmental Symposium, “Desalination and the Gulf: The Relationship between the Environment and Meeting the Region’s Water Needs.”Held in Manama, Kingdom of Bahrain under the Patronage of H.E. Eng. FahmiBin Ali Aljowder, Minister for Electricity and Water Affairs, this event was theresult of 12 months of

A systematic study of cell membrane morphologies whose structure is governed by cubic symmetries has been performed. It is suggested that they are described by periodic cubic surfaces for which space filling surface foliations given by truncated Fourier series defined by the space groups is used as structural representations. Using this a method is developed which enables a direct ultrastructural

This thesis explores crystal-phase engineering of nanowires to fabricate advanced quantum structures for charge and spin transport studies. Quantum dots formed by crystal-phase tuning during epitaxial growth of InAs nanowires were used as a starting point to realize and electrically characterize two different types of parallel-coupled quantum dots; electron-hole quantum dots and electron-elect

Our aim was to identify serum microRNAs (miRNAs) in healthy humans which associate with future onset of both diabetes mellitus and cardiovascular disease. We performed global profiling of 753 mature human miRNAs in serum of 12 pilot subjects followed by measurement of 47 consistently expressed miRNAs in fasting serum of 553 healthy subjects from the baseline exam (1991–1994) of the population base

BACKGROUND: It is estimated that global dementia rates will more than triple by 2050 and result in a staggering economic burden on families and societies. Dementia carries significant physical, psychological and social challenges for individuals and caregivers. Informal caregiving is common and increasing as more people with dementia are being cared for at home instead of in nursing homes. Caregiv

This thesis addresses micromechanical modeling of materials using computational homogenization. On this topic, theoretical and computational issues are discussed, and numerical investigations of different material systems are performed. The material systems considered are; metal matrix composites, metal sheets with stiff inclusions, metal sheets containing voids, sand with inclusions of gravel and

Världens befolkning ökar och i takt med det utbredningen av städer och urbana miljöer. Urbaniseringen är en extrem utmaning för många djurarter och antalet arter har minskat i takt med urbaniseringen. Trots detta finns det en hel del arter som tillsynes verkar blomstra i staden, mycket tack vara den rika tillgången till mat. Men så finns det en också baksida, nämligen de olika miljöföreningar som Urbanisation of natural habitats is rapidly intensifying and poses a potential global threat for wildlife. Thus, it is important to explore its impact on wildlife in order to understand the present and future threats and how resilient organisms are to them. Although many species decline in abundance or even disappear once an area is urbanised, some species, populations and/or individuals are able

Asteroid 4 Vesta is the only currently identified asteroid for which we possess samples in the form of meteorites. These meteorites revealed us that Vesta is a differentiated body and that its differentiation produced a relatively thin basaltic crust that survived intact over its entire collisional history. The survival of the vestan basaltic crust has long been identified as a pivotal constraint

This work concerned experimental studies of heat transfer in a light-duty diesel engine. Combustion is affected by several parameters, such as pressure, engine speed, mass of injected fuel and in-cylinder gas flow. These parameters are in turn affected by the combustion chamber geometry and fuel spray characteristics. At high load the exhaust heat was increased more than at high engine speed. Swir

As our knowledge of diseases and the development of new technologies increases,many health problems that were lethal in the past can now be cured. Couple thisto better life quality and improved medical care, we are seeing an increase in theaverage life expectancy. The downside to this, however, is that diseases that developwith age are becoming more common. There is currently an estimated 47 milliCerebral senile plaque is one of the main pathologies of Alzheimer's disease (AD). The amyloid cascade hypothesis suggests that the aggregation of amyloid beta (Abeta) peptide is involved in the pathogenesis of AD, which is supported by the fact that Abeta overexpression or production of more aggregation-prone variants lead to early-onset dementia. In this work, we mainly studied the in vitro Abet

Social Network Games (SNGs) first appeared in Asia in the latter half of the 00s, and soon became a widespread phenomenon all over the world. In the West, US developer Zynga quickly rose to fame with their hit title FarmVille, and now enjoys a nearly monopolistic position among games on Facebook. In Japan as well, the SNG industry has grown at an exceptional pace since its birth and is predicted t

The concept of OptimalTempered Asphalt, OTA, stands for the best temperature all aspects considered for the bitumen and the manufacturing process as well as the end-product. This is achieved in various ways using additives, choice of manufacturing procedure and changing mixture of asphalt. This bachelor thesis is a study of the effects the additive Sasobit has on bitumen and asphalt from an OTA pe

Populärvetenskaplig sammanfattning I Arktis finns det enorma lager av kol som ligger i och under permafrosten, vilket är frusen mark som inte har tinat på två år. Mycket tyder på att delar av dessa lager är känsliga för en temperaturökning och idag sker en pågående uppvärmning. Arktis värms snabbare än övriga jorden på grund av att vit reflekterande is och snö smälter, vilket resulterar i att hav The permafrost area in the Arctic region contains vast carbon stocks within and beneath the permafrost, which is frozen ground that has not thawed in two years. These carbon stocks are sensitive to ongoing global warming. When the white and reflective snow and ice melts, the remaining land and sea surfaces absorb more shortwave radiation and get warmer. Heat transport to the Arctic will also incre