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X-ray and weak lensing measurements of galaxy groups and clusters

Kimmo Kettula

As galaxy clusters are the most massive bound objects in the Universe, their number and evolution can be used for constraining cosmological parameters. This requires the knowledge of cluster masses, which is typically achieved through calibrating scaling relations, where an observable is used as a mass proxy. Clusters can be efficiently detected through the X-ray emission of the hot intr...

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Public examination: 11.2.2016

From carbon source to sink - Managing agriculture for climate change mitigation and food production in Ethiopia

Karoliina Rimhanen

Sub-Saharan Africa (SSA) is one of the world´s most vulnerable regions to climate change. Even though the proportion of greenhouse gas emissions produced in SSA is low, the agricultural sector has an enormous potential for climate change mitigation. The aim here is to increase understanding of the potential of climate change mitigation to enhance food security. The focus of the study is ...

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Public examination: 12.2.2016

Home-grown grain legumes in poultry diets

Erja Koivunen

Four experiments were conducted to find appropriate inclusion levels of pea (Pisum sativum L.) and faba bean (Vicia faba L.) (FB) seeds as a substitute for soybean meal (SBM) in poultry diets. The inclusion levels tested for pea (cv. Karita) were 100, 200 and 300 g/kg in layer diet and 150, 300 and 450 in broiler diet and for FB (cv. Kontu) 50 and 100 g/kg in layer diet and 80, 160 and 2...

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Public examination: 12.2.2016

Quality control methods for magnetic resonance imaging in a multi-unit medical imaging organization

Toni Ihalainen

Quality control methods and test objects were developed and used for structural magnetic resonance imaging (MRI), functional MRI (fMRI) and diffusion-weighted imaging (DWI). Emphasis was put on methods that allowed objective quality control for organizations that use several MRI systems from different vendors, which had different field strengths. Notable increases in the numbers of MRI s...

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Public examination: 12.2.2016

Normative Stories of the Formative Moment - Construction of Estonian National Identity in Postimees during the EU Accession Process

Sigrid Kaasik-Krogerus

The longitudinal research "Normative Stories of the Formative Moment. Construction of Estonian National Identity in Postimees during the EU Accession Process" analyzes how Estonian national identity is constructed in country s largest and oldest daily newspaper in relation to the European Union (EU) during 1997-2003. The study combines media studies with political science, EU studies and...

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Public examination: 12.2.2016

Sense of belonging for students with intensive special education needs : An exploration of students' belonging and teachers' role in implementing support

Henri Pesonen

Sense of belonging has been defined as the degree to which an individual feels included, accepted, and supported by others in a variety of social settings, for example, a school context. Previous research on sense of belonging has mainly focused on students with special needs in inclusive schools. There appears to be a shortage of research on sense of belonging in different school placem...

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Public examination: 12.2.2016

Studies of the B0s-B0sbar system in the CMS experiment at the LHC

Giacomo Fedi

The B0s-B0sbar system was investigated using the J/ψ(μ+μ−)φ(K+K−) decay channel. Using 2010 CMS data, corresponding to an integrated luminosity of 40 1/pb, the B0s invariant mass peak was reconstructed and the B0s differential cross section as a function of its transverse momentum and rapidity were measured. Using 2011 CMS data, corresponding to an integrated luminosity of 5 1/fb, the di...

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Public examination: 19.2.2016

Specific probiotics in the upper respiratory tract: colonization, efficacy and safety : with a focus on Lactobacillus rhamnosus GG

Laura Tapiovaara

Upper respiratory infections are among the most common ailments in humans. Evidence for mechanisms suggests that specific probiotic bacteria could reduce the risk and symptoms of these infections. However, the clinical evidence of probiotics in the upper respiratory tract, especially when colonization and the etiological effects are considered, is sparse. In addition, the safety of probi...

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Public examination: 19.2.2016

Regulation of Podocyte apoptosis in Diabetic Kidney Disease - Role of SHIP2, PDK1 and CDK2

Pauliina Saurus

Background: Diabetic nephropathy (DN) is a renal complication of diabetes and a common cause of end-stage renal disease (ESRD). DN presents in its earliest stage with low levels of albumin in the urine (microalbuminuria) and develops into overt albuminuria as the disease progresses. Podocyte loss due to detachment or apoptosis has a central role in the pathogenesis of DN, but the mechani...

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Public examination: 19.2.2016

Inelastic X-ray scattering spectroscopy of small molecules and their radiation chemistry

Juho Inkinen

Non-resonant inelastic x-ray scattering can provide information on various atomic-scale properties and phenomena by probing the spectrum of electronic excitations. The technique allows bulk-sensitive measurements and relatively freely tunable sample conditions even for excitations with energies in the soft x-ray range. Also non-dipolar excitations are accessible by virtue of the ability ...

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Public examination: 19.2.2016

Enhancing children's participation in early childhood education through participatory pedagogy

Jonna Kangas

Children's participation in early childhood education has raised concern and discussion in the international researches lately. Young children have been considered to have lack of participation experiences in early education settings because of institutional policies, social understanding about childhood and perspectives of educators (Bae, 2009; Emilson and Folkesson, 2006; Smith, 2002)....

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Public examination: 19.2.2016

Effects of microbial mitochondriotoxins from food and indoor air on mammalian cells

Stiina Rasimus-Sahari

Humans are exposed to microbes and microbial compounds continuously via environmental exposure and food in addition to our own microbiome. This thesis reports new empirical findings concerning the types of mitochondrial toxins present in food and indoor air and the effects of these toxins on mammalian cells.

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Public examination: 19.2.2016

Transnational Governance by Numbers : Rankings as Mechanisms of Governing

Ossi Piironen

Quantitative knowledge plays an increasing role in transnational governance, even when not explicitly part of formal processes of decision making. This study consists of five research articles that individually and together deal with the subtle ways by which socio-political quantification influence governance and politics. Rather than looking at the direct impact a specific ranking has o...

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Public examination: 19.2.2016

On Heavy-tailed Risks with Applications to Insurance and Finance

Jaakko Lehtomaa

This book is about heavy-tailed random variables and the phenomena they induce to mathematical models. It has become clear that the classical models employing light-tailed variables have an inherent tendency to underestimate the magnitude of extremal events. Recent developments in the financial world (financial crises) suggest that such shortcomings are not merely theoretical curiosities...

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Public examination: 20.2.2016

Towards more consistent estimates of methane fluxes by the eddy covariance technique

Olli Peltola

Methane (CH4) is a strong greenhouse gas and its surface mixing ratio has increased by 150 % since the pre-industrial era. The aggregated atmospheric CH4 budget is relatively well-constrained, however the contribution of different sources/sinks to the overall budget is not. The exchange of matter and energy between the atmosphere and different ecosystems can be studied with eddy covarian...

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Public examination: 26.2.2016

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"Me tehdään nyt jotain ihan muuta"– Y-sukupolven akateemiset yrittäjät rohkeina toimijoina prekaarissa työelämässä

Viljamaa, Lotta / 04.02.2016

"Me tehdään nyt jotain ihan muuta"– Y-sukupolven akateemiset yrittäjät rohkeina toimijoina prekaarissa työelämässä Viljamaa, Lotta Yrittäjyys on ollut voimakkaasti esillä 2010-luvun julkisessa keskustelussa, ja suomalaisessa korkeakoulupolitiikassa pyritään kannustamaan opiskelijoita yrittäjyyteen ja yrittäjämäisempään toimintaan. Suomessa yrittäjien yleinen koulutustaso on nou...

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Ketoprofeenin vaikutus häntäpurtujen sikojen käyttäytymiseen

Kujanen, Sarianna / 04.02.2016

Ketoprofeenin vaikutus häntäpurtujen sikojen käyttäytymiseen Kujanen, Sarianna Hännänpurenta on monisyinen hyvinvointiongelma sikataloudessa. Hännänpurennasta aiheutuu uhriksi joutuneelle sialle akuutti elimistön tulehdusreaktio sekä kipua. Pahimmillaan häntävaurion kautta voi levitä bakteeri-infektioita, jotka muodostavat paiseita sian elimistössä. Lisäksi hännänpurenta hidastaa sikojen...

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Kasviplanktonin ravinnerajoitteisuus eräässä eteläsuomalaisessa järviketjussa

Autio, Mirka / 08.02.2016

Kasviplanktonin ravinnerajoitteisuus eräässä eteläsuomalaisessa järviketjussa Autio, Mirka Phosphorus is traditionally considered to be the primary nutrient limiting primary production in lakes. More recent studies show that sometimes nitrogen can be the limiting nutrient for phytoplankton production in temperate lakes. This study investigated whether the nitrogen has a major role along ...

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Virtual Worlds Apart. A Comparative Study on Digital Games in Japan and the West

Kanerva, Taija / 05.02.2016

Virtual Worlds Apart. A Comparative Study on Digital Games in Japan and the West Kanerva, Taija Tutkimuksen tarkoituksena on laadullista ja vertailevaa tutkimusta käyttämällä löytää eroja japanilaisten ja länsimaisten digitaalisten pelien ja pelikulttuurien välillä, ja tarjota tärkeää tietoa sekä tutkijoille että pelifirmoille. Työn tieteenaloja ovat pelitutkimus ja kulttuuriantropologia...

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