Search results for "kuvaus"

Twin studies on the association of physical activity with cognitive and cerebral outcomes

2020

Regular physical activity (PA) offers positive effects on the human body. However, the effects of PA on cognition and in the brain are less clear. In this paper, we narratively review the relationship of PA with cognition and dementia, first from general perspective and then through genetically informed studies on the topic. Then we move on to imaging studies on exercise and brain anatomy first by presenting an overall picture of the topic and then discussing brain imaging studies addressing PA and brain structure in twins in more detailed way. Regarding PA and cognition or dementia, genetically informed studies are uncommon, even though the relationship between PA and cognitive ageing has …

Dynamics of brain activity underlying working memory for music in a naturalistic condition

2012

Working memory (WM) is at the core of any cognitive function as it is necessary for the integration of information over time. Despite WM’s critical role in high-level cognitive functions, its implementation in the neural tissue is poorly understood. Preliminary studies on auditory WM show differences between linguistic and musical memory, leading to the speculation of specific neural networks encoding memory for music. Moreover, in neuroscience WM has not been studied in naturalistic listening conditions but rather in artificial settings (e.g., n-back and Sternberg tasks). Western tonal music provides naturally occurring motivic repetition and variation, recognizable units serving as WM tri…

Dangers of Demosaicing : Confusion From Correlation

2019

Images from colour sensors using Bayer filter arrays require demosaicing before viewing or further analysis. Advanced demosaicing methods use empirical knowledge of inter-channel correlations to reduce interpolation artefacts in the resulting images. These inter-channel correlations are however different for standard RGB cameras and hyperspectral imagers using colour sensors with added narrow-band spectral filtering. We study the effects of conventional demosaicing methods on hyperspectral images with a dataset originally collected without a colour filter array. We find that using advanced methods instead of bilinear interpolation results in an overall increase of 9–14 % in absolute error a…

Shift-Invariant Canonical Polyadic Decomposition of Complex-Valued Multi-Subject fMRI Data with a Phase Sparsity Constraint

2020

Canonical polyadic decomposition (CPD) of multi-subject complex-valued fMRI data can be used to provide spatially and temporally shared components among groups with both magnitude and phase information. However, the CPD model is not well formulated due to the large subject variability in the spatial and temporal modalities, as well as the high noise level in complex-valued fMRI data. Considering that the shift-invariant CPD can model temporal variability across subjects, we propose to further impose a phase sparsity constraint on the shared spatial maps to denoise the complex-valued components and to model the inter-subject spatial variability as well. More precisely, subject-specific time …

Postoperative Sagittal Balance Has Only a Limited Role in the Development of Adjacent Segment Disease After Lumbar Spine Fusion for Degenerative Lumb…

2022

Study Design. Retrospective additional analysis of a prospective follow-up study. Objectives. We aimed to find out whether poor postoperative sagittal alignment increases revisions for adjacent segment disease (ASD) after lumbar spine fusion (LSF) performed for degenerative lumbar spine disease. Summary of Background Data. Revisions for ASD accumulate over time after LSF for degenerative lumbar spine disease. The etiology of ASD is considered multifactorial. Yet, the role of postoperative sagittal balance in this process remains controversial. Materials and Methods. A total of 215 consecutive patients who had undergone an elective LSF surgery for spinal stenosis with (80%) or without (20%) …

This is not a manipulation : authentic bodies in digital image

2014

Tämä kaksiosainen tutkimus rakentaa ensimmäisessä osassa teoreettista välineistöä digitaalisen valokuvan ja autenttisen ruumiin käsittelemiseen yhdistämällä Michell Foucaultin ja Judith Butlerin ajatuksia. Toisessa osassa tätä välineistöä sovelletaan Intelligent Life lehden kansikuvaa käsittelevään tapaustutkimukseen, jossa kansikuvan alleviivattua digitaalista muokkaamattomutta käsitellään performatiivisen autenttisuuden näkökulmasta. Autenttisen määrittelemisen ja käytön kontrolli on tutkimuksen keskeinen teema. Foucault ja Butler yhdistyvät näkemykseksi, jonka mukaan autenttinen rakentuu teoista jotka performoivat autenttista. Autenttisen ja epäautenttisen välisen rajan hämärtäminen digi…

Tale(s) of a forest – re-creation of a primeval forest in three environmental narratives

2020

We analyze three environmentally conscious works that are concerned with the state of Finnish forests: the documentary film Metsän tarina/Tale of a Forest (2012), the book with the same name (2013) and the series of short documentaries Tarinoita metsästä/Tales from the Forest (2013). By combining methods from arts research and ecology, we ask how the narratives adapt material from nature photography. The film and book present mythic stories and old Finnish beliefs about forests. They also contain references to cultural memory. Additionally, the biodiversity on display reflects a conventional practice to exhibit large or charismatic species. However, the ecological message remains only impli…

"Olla hän joka jotain merkitsee" : päähenkilön identiteetin tarkastelua Juha Itkosen romaanissa Anna minun rakastaa enemmän

2010

Belonging, Trust and Relationships : Collaborative Photography with Unaccompanied Minors

2020

Participant-induced elicitation in digital environments

2020

This chapter discusses participant-induced elicitation interview (PIE) in the light of two fieldwork cases focusing on Finnish lifestyle blogging and older adults as ICT users. By definition, elicitation refers to a process where something, such as a response, meaning, or answer, is evoked in or drawn out from an interviewee. PIE is based on photo-elicitation, where the interviewee is asked to take photographs dealing with the topics of the research. The central idea of PIE as participant-induced elicitation is based on the active agency of the person collaborating with the researcher. Under the premises of the research, the interviewee creates something subjective and personal that can be …