Search results for "Iitti"

Abiotic and biotic controls on methane formation down to 2.5 km depth within the Precambrian Fennoscandian Shield

2017

Abstract Despite a geological history characterised by high temperature and pressure processes and organic carbon deprived crystalline bedrock, large amounts of hydrocarbons are found in deep groundwaters within Precambrian continental shields. In many sites, methane comprises more that 80% of the dissolved gas phase reaching concentrations of tens of mmol l −1 . In this study, we used isotopic methods to study the carbon isotope systematics and sources of crustal methane within the Fennoscandian Shield. The main study sites were the Outokumpu Deep Drill Hole and the Pyhasalmi mine in Finland, both of which allow groundwater sampling down to 2.5 km depth and have been previously studied for…

Inbreeding reveals mode of past selection on male reproductive characters in Drosophila melanogaster

2013

Directional dominance is a prerequisite of inbreeding depression. Directionality arises when selection drives alleles that increase fitness to fixation and eliminates dominant deleterious alleles, while deleterious recessives are hidden from it and maintained at low frequencies. Traits under directional selection (i.e., fitness traits) are expected to show directional dominance and therefore an increased susceptibility to inbreeding depression. In contrast, traits under stabilizing selection or weakly linked to fitness are predicted to exhibit little-to-no inbreeding depression. Here, we quantify the extent of inbreeding depression in a range of male reproductive characters and then infer t…

Quantifying and addressing the prevalence and bias of study designs in the environmental and social sciences

2020

Building trust in science and evidence-based decision-making depends heavily on the credibility of studies and their findings. Researchers employ many different study designs that vary in their risk of bias to evaluate the true effect of interventions or impacts. Here, we empirically quantify, on a large scale, the prevalence of different study designs and the magnitude of bias in their estimates. Randomised designs and controlled observational designs with pre-intervention sampling were used by just 23% of intervention studies in biodiversity conservation, and 36% of intervention studies in social science. We demonstrate, through pairwise within-study comparisons across 49 environmental da…

Chlorophyll a fluorescence illuminates a path connecting plant molecular biology to Earth-system science

2021

Remote sensing methods enable detection of solar-induced chlorophyll a fluorescence. However, to unleash the full potential of this signal, intensive cross-disciplinary work is required to harmonize biophysical and ecophysiological studies. For decades, the dynamic nature of chlorophyll a fluorescence (ChlaF) has provided insight into the biophysics and ecophysiology of the light reactions of photosynthesis from the subcellular to leaf scales. Recent advances in remote sensing methods enable detection of ChlaF induced by sunlight across a range of larger scales, from using instruments mounted on towers above plant canopies to Earth-orbiting satellites. This signal is referred to as solar-in…

Lotman’s semiotic theory of culture or Laclau’s political ontology?

2018

AbstractThe present article concentrates on the main discrepancies that should arise in the discussion between Lotman’s semiotics of culture and Laclau’s discursive theory of hegemony. Some significant – but still abstract – commonalities conceal fundamental disagreements which I would group around four topics. Firstly, Lotman’s semiotic method is at odds with Laclau’s ontological way of thinking. Secondly, although both Lotman and Laclau subscribe to the openness of signification, it is impossible to incorporate their accounts of this openness without loose ends. In order to substantiate this claim, I examine Lotman’s concept of “boundary” and Laclau’s concept of the “limit.” Thirdly, we s…

Viipurin poliittiset jännitteet : tapahtumia ja historiografiaa

2019

Kansanvalta vaarassa! : Väinö Tannerin demokratian puolustus vuosina 1930-1932

2004

Todeksi uskottua : kansandemokraattinen Neuvostoliitto-journalismi rajapinnan tulkkina vuosina 1964-1973

2008

Aimo Ruususen väitöstutkimus paljastaa, miten ideologiset ja muut riippuvuudet näkyivät suomalaisten kansandemokraattisten toimittajien työssä kylmän sodan vuosina ja Neuvostoliiton historian mielenkiintoisena ajanjaksona 1960-luvun puolivälistä alkaen.- Kansandemokraattisissa sanomalehdissä vaiettiin joistakin Neuvostoliiton kannalta epäedullisista asioista, vaikka sellaisistakin eräissä kriisitapauksissa kerrottiin, Ruusunen kertoo.Tämän lehtiryhmän toimittajat olivat kahden erilaisen kulttuurin välisellä rajapinnalla ja sen tulkkeina erikoisessa asemassa. Toisaalta heillä oli paljon mahdollisuuksia tiedon saantiin, toisaalta heillä oli ideologisia esteitä asioiden julkiseen pohdintaan. K…

"Sanakirjat pitkin pöytää" : kuvallisuuden suhde avantgardeen Pentti Saarikosken 1960-luvun poliittisessa lyriikassa

2012

In Saarikoski’s political poems, there are two things combined: figurativeness which is the traditional medium of poetry, and political radicalism. This combination is part of Saarikoski’s “political poetics”. Not much academic research has been carried out about Saarikoski’s lyrics, but it’s been studied earlier by for example Janna Kantola and H. K. Riikonen. In Saarikoski’s political-regarded works of the 1960’s, the most avant-garde-influenced are Mitä tapahtuu todella? (“What really happens?”) (1962) and Ääneen (“Aloud”) (1966). According to my interpretation, Mitä tapahtuu todella? is mostly influenced by artistic avant-gardism: collage and montage are used, among other things. In Ään…

Kapinalliset koululaiset. Yhteiskunnallisen koululaisliikkeen juurilla

2020

Lectio praecursoria historian väitöskirjaan Teinikuntatoiminnan sukupolvet. Muistitietohistoria oppikoulujen koululaisliikkeestä 1950–1970-luvuilla, Oulun yliopistossa 21.2.2020.