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We study the geodesic exponential maps corresponding to Sobolev type right-invariant (weak) Riemannian metrics mu((k)) (k >= 0) on the Virasoro group Vir and show that for k >= 2, but not for k = 0, 1, each of them defines a smooth Frechet chart of the unital element e is an element of Vir. In particular, the geodesic exponential map corresponding to the Korteweg - de Vries (KdV) equation ( k = 0)
Long-term records of environmental history at decadal to millennial time-scales enable an assessment of ecosystem variability and responses to past anthropogenic disturbances and are fundamental for the development of environmental management strategies. This study examines the local variability of land-use history in the South Swedish Uplands over the last 200 years based on pollen records from t
The atmospheric concentration of elemental carbon (EC) in Europe during the six-year period 2005-2010 has been simulated with the EMEP MSC-W model. The model bias compared to EC measurements was less than 20% for most of the examined sites. The model results suggest that fossil fuel combustion is the dominant source of EC in most of Europe but that there are important contributions also from resid
Solar influences on climate variability are one of the most controversially discussed topics in climate research. We analyze solar forcing of flood frequency in central Europe during spring and summer on interannual to multi-centennial timescales, integrating daily discharge data of the River Ammer (southern Germany) back to AD1926 (∼solar cycles 16-23) and the 5500-year flood layer record from va
The two major aims of this study are (1) To test the performance of the Landscape Reconstruction Algorithm (LRA) to quantify past landscape changes using historical maps and related written sources, and (2) to use the LRA and map reconstructions for a better understanding of the origin of landscape diversity and the recent loss of species diversity. Southern Sweden, hemiboreal vegetation zone. The
For model-based quantitative reconstructions of past vegetation cover on the scale of landscapes, pollen productivity estimates (PPEs) are key input parameters. In this study, we employed a random sampling strategy to collect moss polsters at 20 sites in Changbai Mountain, northeastern China. A detailed vegetation survey within 1000-m radius around each sampling point was carried out and digitized
Popular Abstract in Swedish Bakgrund Alzheimers sjukdom (AD) är den vanligaste formen av demenssjukdom och svarar för ca 60 % av dessa patienter. Sjukdomen har en smygande debut och den sjukliga processen i hjärnan börjar troligen decennier innan den ger kliniska symptom som försämrat minne och organisationsförmåga, språksvårigheter, problem med tidsuppfattning och orientering. Även förmågan att uBackground Prospective longitudinal studies in Alzheimer's disease (AD) that include cholinesterase inhibitor (ChEI) treatment in routine clinical settings are scarce. The patients vary in severity of the disease, clinical course, rate of progression and response to treatment. Knowledge about the predicted course of the disease, sociodemographic and clinical factors affecting the outcome and the i
Den globala uppvärmningen orsakar stigande havsnivåer till följd av avsmältning av landis samt termisk expansion av vattnet. Allvarliga konsekvenser befaras till följd av detta, stora landarealer kan komma att svämmas över vilket bland annat kan bidra till klimatflyktingar. Om havsnivån ökar drastiskt står vi i Sverige inför väldiga utmaningar eftersom stora delar av befolkningen är bosatta längs
Titel: Möjligheten av implementering av Soft Landings i Sverige Författare: Sebastian Eddin & Nadja Pilav Handledare: Stefan Olander Examinator: Rikard Sundling Närmare 40 procent av den globala energianvändningen är kopplad till byggbranschen och byggrelaterade verksamheter. Trots att flera initiativ pågår både på nationell och internationell nivå från både den svenska regeringen och EU nTitle: Feasibility of the Implementation of Soft Landings in Sweden Authors: Sebastian Eddin & Nadja Pilav Supervisor: Stefan Olander Examiner: Rikard Sundling Close to 40 percent of global energy use is associated with the construction industry and building-related activities. Although several initiatives are underway both on national and international level from both the Swedish governme
One way of reducing environmental pollution is to reduce our dependence on fossil fuels by replacing them with solar radiation (Rs), which is one of the main sources of clean and renewable energy. In this study, daily Rs values at seven meteorological stations in Iran (Ahvaz, Isfahan, Kermanshah, Mashhad, Bandar Abbas, Kerman and Tabriz) over 2010-2019 were estimated using empirical models, suppor
Background: Swimming ability among children in the city of Malmö, Sweden is strongly affected by socioeconomic differences. We investigated to what extent mediating health and lifestyle factors, such as children’s eating, sleeping and physical activity habits, as well as the characteristics of the social and working environment at both school and home, could explain the socioeconomic gradient in s
Vegetationsbränder är världsomspännande problem som skakar samhällen genom att skada deras ekonomier och orsaka allvarliga, ibland dödliga, hälsokomplikationer bland deras befolkningar. Takten av vegetationsbrandsförekomst har ökat de senaste åren till följd av en stigande global medeltemperatur. Denna takt förväntas att fortsätta öka på grund av den globala uppvärmningen. I efterdyningarna av braWildfires are worldwide problems that stress societies by damaging their economies and they cause serious, sometimes fatal, health implications among the populations. In recent years, the rate of wildfire occurrence has increased as the global average temperature has risen. Because of global climate change, this rate is expected to continue rising. In Sweden, in the aftermath of the 2014 Västmanla
Understanding the physicochemical properties of fly ash from industrial and municipal solid waste incineration is essential for its safe and efficient utilization. This study investigated the particle size distribution and elemental size partitioning in fly ash aerosols from a waste-to-energy (WtE) facility with grate-fired boilers, along with the composition of boiler deposits and ash collected i
