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Hydropower in Brazil stands for 64.5% of all energy sources in the country. The largest number of hydropower plants are located in the Paraná basin, which together have an installed capacity of approximately 40 GW including the world’s largest producing hydropower plant, Itaipu. The wet season during Brazilian summer (January-March) is the most important for hydropower. Occasionally, extreme, su
Popular Abstract in Swedish De senetruskiska votivhuvudena i terrakotta (bränd lera) från Tessennano på Medelhavsmuseet i Stockholm hittades 1956 i anslutning till en lantlig helgedom, ungefär tio mil norr om Rom, Italien. Att de är votivgåvor innebär att de skänktes av tillbedjare som representationer av dem själva inför gudomen eller gudomarna. Avhandlingen diskuterar emellertid inte de religiösThe Late etruscan terracotta votive heads from Tessennano were found near a rural sanctuary about a hundred km to the North of Rome in 1956. Whereas the facial fronts are serially produced with moulds, the backs are handmade. By using not only the moulded and the handmade features but the raw material (clay and temper) as well, it has been possible to make suggestions as to how, when and where the
In a phase of instability during the dynamical evolution of some multiple exoplanetary systems, exchange of angular momentum and/or energy through gravitational interactions between planets will lead to alterations of their orbital properties. In some cases, planetary orbits end up crossing, which leads to close encounters between two planets. In turn, they undergo a planet--planet scattering even
Denna rapport avser en stabilitetsanalys för att undersöka möjligheten att bygga en kupol i trä med en spännvidd på 300 meter. Alla lastbärande delar har modellerats med limträ av klassen GL30c och med dimensionerna 0.8×1.6 m2. Lastfallen valdes till 2 kN/m2 respektive 4 kN/m2 för symmetriska och asymmetriska snölaster. De numeriska beräkningarna utfördes i finita element-mjukvaran Abaqus FEA och The aim of this thesis is to study the feasibility of building a timber dome with a span of 300 metres, concerning elastic stability. The load-bearing members were modelled with the properties of glued laminated timber GL30c with the dimensions 0.8×1.6 m2. The design loads were 2 kN/m2 and 4 kN/m2 in symmetrical and asymmetrical load cases, respectively. The numerical calculations were performed u
Den ökade användningen av läkemedel och otillräcklig teknik i reningsverken har lett till allt större halter av läkemedel och andra organiska mikroföroreningar (OMF) i naturliga vatten. Detta har i sin tur konstaterats påverka exempelvis fiskars beteende och fortplantningsförmåga. OMF har även detekterats i det svenska dricksvattnet. På grund av detta har en satsning skett de senaste åren inom forThe increased use of pharmaceuticals in combination with inadequate techniques and procedures in the wastewater treatment plants (WWTPs) have resulted in higher concentrations of pharmaceuticals and other organic micro pollutants (OMPs) in the aquatic environment. It has been established that these pollutants have caused changes in the behaviour and reproduction of fishes. Furthermore, these OMPs
Private equity is a growing global phenomena and private equity companies have become a major force in many of Sweden’s industries. These companies own portfolio companies which together employs around 190 000 people and have an annual revenue of over 318 billion SEK. The purpose of this thesis was to describe and analyze the Swedish private equity industry and individual companies’ competitive st
We present a study of spectral diagnostics available from optical spectra with R = 17 000 obtained with the VLT/Giraffe HR15n setup, using observations from the Gaia-ESO Survey, on the gamma Vel young cluster, with the purpose of classifying these stars and finding their fundamental parameters. We define several spectroscopic indices, sampling the amplitude of TiO bands, the H alpha line core and
Popular Abstract in Swedish Alzheimers sjukdom är den vanligaste orsaken till uppkomsten av demens. Detta tillstånd innebär att delar av hjärnan skrumpnar på ett karakteristiskt vis, när nervceller går under. Den drabbade brukar först märka svårigheter med korttidsminnet, för att senare drabbas av språksvårigheter, räknesvårigheter, svårigheter med rumslig uppfattning och svårigheter att veta hur Alzheimer’s disease (AD), the most common cause of dementia, is a growing concern. As the life expectancy increases across the globe, the number of affected people is estimated to reach 100 million by 2050. Efforts to develop effective treatments for humans have mostly been based on the assumption that a faulty homeostasis of beta amyloid (Aβ) is the triggering or the driving factor behind this co
Chronic obstructive pulmonary disease (COPD) is characterised by a chronic inflammation in conducting airways and the alveolar parenchyma. The inflammation, which is a consequence of inhalation of noxious gases like tobacco smoke, has traditionally been thought to be driven by innate immune responses. However, more recent studies have revealed an increase in lymphocyte-rich lymphoid aggregates (LA
Popular Abstract in Swedish Under de senaste två decennierna har transplantation av embryonal vävnad från ventrala mesencephalon, mitthjärnan, utvecklats till en möjlig terapi för Parkinson’s sjukdom. Ju bättre transplantatet återställer den dopaminerga neurotransmissionen, desto större blir den motoriska förbättringen hos patienten. Dessvärre dör över 90% av de dopaminerga nervcellerna under tranOver the past two decades, grafting of embryonic nigral tissue has developed into a feasible therapeutic strategy for Parkinson's disease (PD). It has become apparent that the degree of restoration of dopaminergic neurotransmission by the transplanted cells is highly correlated to the symptomatic relief. However, the efficacy of the treatment is still far from optimal: More than 90% of the grafted
Popular Abstract in Swedish Denna avhandling presenterar nya metoder för att analysera bilder på hjärtat för att utesluta eller bekräfta kranskärlssjukdom. Hjärtat har en livsviktig uppgift, att pumpa runt blodet för att förse alla kroppens organ med energi och syre. Vid förträngningar i kärlen som försörjer hjärtmuskeln med blod (kranskärlen) uppkommer ett tillstånd som kallas ischemisk hjärtsjukIn this thesis, methods for automated analysis of myocardial perfusion single photon emission computer tomography (myocardial perfusion SPECT, MPS) images have been successfully developed and evaluated. MPS images show the perfusion of the myocardium and are used for diagnosing patients with suspected ischemic heart disease. The disease is characterized by reduced perfusion to a region of the myoc
Popular Abstract in Swedish Denna avhandling består av fyra separata artiklar. Den gemensamma nämnaren för alla artiklarna är att de behandlar pengar och nätverkseffekter. En vara med nätverkseffekter är en vara där nyttan av varan är beroende av hur många andra individer som använder sig av varan. Ett typexempel i litteraturen är faxmaskiner: ju fler som har en fax, desto större nytta har man av This thesis contains four separate papers in the field of monetary economics. The common basis for all the papers is that they deal with money and network effects in one way or another. Although the common basis is the same in all the articles, different approaches are used: theory, econometrics and history of economic thought. This first essay focuses on the network effect in the use of money an
BACKGROUND: Alcohol as a cause of death in middle-aged patients is well-known from clinical studies. A similarly important correlation in the general population of urban middle-aged men is highly underestimated. Health screening investigations have shown that mortality related to alcohol is five times more common in nonparticipants than in participants. From the mid-70s, the Malmoe Screening and I
This work aims to study the flow of non-Newtonian fluids and has two main goals. First, the power-law and Herschel Bulkley fluids are studied in a Couette rheometer. Second, the static and dynamic interaction of dual particles in power-law fluid are investigated.For the first goal, Computational Fluid Dynamics (CFD) is employed to understand the flow behavior of powe-rlaw fluid in the Couette rhe
This report addresses a potentially important effect of incubators, namely their impact on innovation. Using rich individual-level data on CEOs and employees and whether they are inventors (has patented), we can link these individuals to incubator firms and the general population of individuals and firms. In this way, we are able to create a matched sample of treated and controls allowing us to co
BACKGROUND: Germinal matrix-intraventricular haemorrhage (GMH-IVH) remains a substantial issue in neonatal intensive care units worldwide. Current therapies to prevent or treat GMH-IVH are limited. Stem cell-based therapies offer a potential therapeutic approach to repair, restore, and/or regenerate injured brain tissue. These preclinical findings have now culminated in ongoing human neonatal stud
Over the last couple of years both cameras, audio and radio sensors have become cheaper and more common in our everyday lives. Such sensors can be used to create maps of where the sensors are positioned and the appearance of the surroundings. For sound and radio, the process of estimating the sender and receiver positions from time of arrival (TOA) or time-difference of arrival (TDOA) measurements
This thesis aims at describing the developmental patterns of text production in four text types: spoken and written narrative texts, and spoken and written expository texts (n=316), produced by four age groups: 10-year-olds, 13-year-olds, 17-year-olds and university students (n=79). It explores material from an experimental study with a cross-sectional design comprising spoken texts recorded on vi
