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Top-down control of pest populations by their natural enemies is a crucial ecosystem service supporting agricultural production. The relationship between predator community composition and predation rates of pests remains poorly investigated. A deeper understanding of the processes shaping interaction strength in agroecosystems is needed if we are to accurately predict natural pest control service
ABSTRACT: We plan to conduct a case-control study to investigate whether exposure to nitrogen dioxide (NO2) increases the risk of stroke. In case-control studies, selective participation can lead to bias and loss of efficiency. A two-phase design can reduce bias and improve efficiency by combining information on the non-participating subjects with information from the participating subjects. In ou
Popular Abstract in Swedish Dagens industriella system är inte långsiktigt hållbara. För detta behövs bland annat fundamentala förändringar av hur samhällets resurser används. Detta gäller den totala volymen som förbrukas men också vilka ämnen som sätts i omlopp i samhället. Därutöver behövs ett mer rättvist utnyttjande av dessa resurser. Industriell ekologi är den vetenskap som studerar de förändToday's industrial systems are regarded to have unsustainable characteristics. In order to acquire a more sustainable state, fundamental changes are needed in the qualitative and quantitative aspects of the resource flows associated with such systems. These need to go hand in hand with a more equitable distribution of the benefits and burdens associated with such resource use. The identification a
Radial motions of stars in nearby moving clusters are determined fromaccurate proper motions and trigonometric parallaxes, without any use ofspectroscopy. Assuming that cluster members share the same velocityvector (apart from a random dispersion), we apply a maximum-likelihoodmethod on astrometric data from Hipparcos to compute radial and spacevelocities (and their dispersions) in the Ursa Major,
Weathering of silicate minerals releases dissolved silicate (DSi) to the soil-vegetation system. Accumulation and recycling of this DSi by terrestrial ecosystems creates a pool of reactive Si on the continents that buffers DSi export to the ocean. Human perturbations to the functioning of the buffer have been a recent research focus, yet a common assumption is that the continental Si cycle is at s
Robust and efficient numerical methods are an essential prerequisite for the computer based dynamical analysis of engineering systems. In vehicle system dynamics, the methods and software tools from multibody system dynamics provide the integration platform for the analysis, simulation and optimization of the complex dynamical behaviour of vehicles and vehicle components and their interaction with h
Popular Abstract in Swedish Undersøkelsen omfatter 44 skandinaviske personer med Laurence-Moon-Bardet-Biedl syndrom. Disse personer hadde netthinne degenerasjon og minst ytterligere 2 av de øvrige tradisjonelle tegn på lidelsen: overvekt, overtallige fingre og tær, mangelfullt utviklede kjønnsorganer og nedsatt intelligens. Undersøkelsen viste at pasientene fikk nattblindhet og avtagende syn i barThe study included 44 Scandinavian individuals with the autosomal recessive inherited Laurence-Moon-Bardet-Biedl syndrome. Inclusion criteria were retinal dystrophy plus at least 2 more of the remaining traditional cardinal signs of the syndrome: obesity, polydactyly, hypogenitalism and mental retardation. The study showed that the patients had an early onset of night blindness and a poor visual p
Många olika aktörer är på skilda sätt involverade under en produkts livscykel. Samhällets miljöpolitik syftar till hushållning med råvaror som resurser och att undvika eller minska negativ. Den första fallstudien behandlar kött och har sitt huvudsakliga fokus på miljöpolitikens styrmedel kring produktion och distribution, med utblick mot konsumtions- och avfallsfaserna. Livsmedelsprodukter har e
Popular Abstract in Swedish Feromonmedierat parningssystem hos ett nattfly Min avhandlings huvudsakliga mål är att identifiera och bestämma faktorer som påverkar det feromon-medierade parningsystemet hos sädesbroddflyet Agrotis segetum. Dessa faktorer inkluderar både honkönets produktion av sexualferomon såväl som hankönets feromon-inducerade respons, men också andra överlevnads- och reproIn a series of studies, carried out in the laboratory and in the field in southern Sweden, I have examined factors influencing the mating behaviour of the turnip moth Agrotis segetum. The reproductive potential of the sexes and the mating behaviour was studied. The reproductive potential of males is greater than that of females. Males are ready to mate every night, while females rarely mat
Aims/hypothesis. Fat accumulation in the liver has been shown to be closely correlated with hepatic insulin resistance and features of insulin resistance, also independently of body weight. It remains to be established how fat in the liver correlates with that in other depots, and whether any association differs between men and women. Methods. Liver fat (assessed using proton spectroscopy), intra-
We study here deterministic broadcasting in geometric radio networks (GRN) whose nodes have complete knowledge of the network. Nodes of a GRN are deployed in the Euclidean plane (R 2) and each of them can transmit within some range r assigned to it. We adopt model in which ranges of nodes are non-uniform and they are drawn from the predefined interval 0 ≤ r min ≤ r max . All our results are in the
Diversity in lifestyles and socioeconomic status among European populations, and recent socio-political and economic changes in transitional countries, may affect changes in adiposity. We aimed to determine whether change in the prevalence of obesity varies between the socio-politically transitional North-East European (Łódź, Poland; Szeged, Hungary; Tartu, Estonia), and the non-transitional Medit
Background: Traumatic brain injuries continue to be a significant cause of mortality and morbidity worldwide. Most traumatic brain injuries are classified as mild, with a low but not negligible risk of intracranial hemorrhage. To help physicians decide which patients might benefit from a computerized tomography (CT) of the head to rule out intracranial hemorrhage, several clinical decision rules h
Background: Rare and ultra-rare diseases (URDs) are often chronic and life-threatening conditions that have a profound impact on sufferers and their families, but many are notoriously difficult to detect. Niemann-Pick disease type C (NP-C) serves to illustrate the challenges, benefits and pitfalls associated with screening for ultra-rare inborn errors of metabolism (IEMs). A comprehensive, non-sys
Pancreas transplantation is today a technically successful procedure and provides an alternative to insulin injections for the treatment of Type I diabetes mellitus. This thesis was undertaken while pancreas transplantation was developing and while several fundamental questions were being asked about both endocrine and exocrine drainage of the transplanted pancreas as well as how best to diagnose
Popular Abstract in Swedish Syftet med den aktuella forskningen är att ge en bättre förståelse av förmaksflimmer, den vanligaste rytmrubbningen i hjärtat som drabbar så många som var tionde över 70 år. Mekanismerna för förmaksflimmer är långt ifrån kartlagda, vilket bland annat leder till att behandlingen är standardiserad istället för att den beror på de mekanismer som styr varje enskild patientsThis doctoral thesis is in the field of biomedical signal processing with focus on methods for the analysis of atrial fibrillation (AF). Paper I of the present thesis addresses the challenge of extracting spatial properties of AF from body surface signals. Different parameters are extracted to estimate the preferred direction of atrial activation and the complexity of the atrial activation pattern
For managers, meetings may be an arena “where the action is”: situations to display competence and moral character. However, others may feel less involved, and meetings may be experienced as nonsense, as meaningless and worthless. A recurring theme in various studies is complaints about meetings, particularly regarding their frequency, their emptiness, and the forced attendance, taking time from w
“The stage is a playground, it’s not a serious place where you have to be at your best, ... it should be a playground.” Nir Ben Gal, choreographerDuring my years of study, and later as a performing artist, performance was never discussed conceptually and questions regarding audience interaction and stage fright were seldom raised. Further, musicians suffering from stage fright are most often refer
One of the major arguments made in the current boom in Haitian revolutionary studies connects today’s conditions of possibility for modern democracy and human rights to the abolition of slavery during the Haitian Revolution (1791–1804). During the last decade, however, this connection between the Haitian Revolutionary period and our own age has been questioned by an increasing number of scholars:
My research is concerned with the co-optation of sustainability, feminism, and social justice within and by the fast fashion industry in Sweden. This stems from a desire to understand the acceleration of sustainability discourse and narratives built by brands (through communication, advertisement, marketing, and sustainability reporting) and how this shapes consumption. I argue that the dominating
