Search results for "kuva"

Hyperspectral imaging of asteroids using an FPI-based sensor

2021

The compositions of asteroids are of interest for the planetary sciences, mining, and planetary defense. The main method for evaluating these compositions is reflectance spectroscopy. Spectroscopic measurements performed from Earth can not resolve how different materials are distributed on the asteroids, making flyby-- and rendezvous missions necessary for obtaining detailed information. Using the CubeSat platform could reduce the costs of these missions, but it also sets constraints on the payload mass and volume. One small and light instrument capable of producing spatially resolved spectral data is a hyperspectral imager based on the Fabry-Perot interferometer. We propose a method of cal…

Family business branding : communicating a family-based brand identity

2017

Scholars suggest that family-owned businesses can capitalize on their family ties by promoting the fact that they are family-owned in their marketing communications. Existing research suggests that promoting the familial component of a family-owned business can evoke positive associations with the business' stakeholders, increase employee loyalty and motivation, and be a source of competitive advantage against non-family businesses. Although there is an increasing awareness that family-owned businesses can benefit from promoting the fact that they are family-owned in their marketing and branding efforts, very little literature exists on how such a strategy is effectively implemented. By app…

Luokanopettajien käsitykset kolmiportaisesta tuesta ja työssä jaksamisesta

2015

Tämän tutkimuksen tarkoituksena on selvittää, miten luokanopettajat kokevat roolinsa kolmiportaisessa tuessa, miten he ovat omaksuneet kolmiportaisen tukimallin käytännössä sekä millaisia käsityksiä luokanopettajilla on omasta työssä jaksamisesta, kun luokassa on tukea tarvitsevia oppilaita. Tutkimuksen aineisto kerättiin puolistrukturoidulla teemahaastattelulla. Haastattelut toteutettiin syksyllä 2013 haastattelemalla kahden eri eteläsuomalaisen alakoulun luokanopettajia (n=6). Tutkimuksessa käytettiin fenomenografista tutkimusotetta. Fenomenografia on aineistolähtöinen menetelmä, jossa kuvauskategoriat syntyvät aineiston pohjalta eivätkä teoriasta käsin. Luokanopettajien käsitykset kolmip…

Sarjakuva suomalaisen yhteiskunnan peilinä : Ola Fogelbergin Pekka Puupää-sarjakuva Kuluttajain Lehdessä 1925-1952

2001

Turvaa ja turvattomuutta Ranskassa

2016

A GPU-accelerated augmented Lagrangian based L1-mean curvature Image denoising algorithm implementation

2015

This paper presents a graphics processing unit (GPU) implementation of a recently published augmented Lagrangian based L1-mean curvature image denoising algorithm. The algorithm uses a particular alternating direction method of multipliers to reduce the related saddle-point problem to an iterative sequence of four simpler minimization problems. Two of these subproblems do not contain the derivatives of the unknown variables and can therefore be solved point-wise without inter-process communication. Inparticular, this facilitates the efficient solution of the subproblem that deals with the non-convex term in the original objective function by modern GPUs. The two remaining subproblems are so…

Äärellisten Borel-mittojen Fourier-muunnoksista euklidisissa avaruuksissa

2016

Tutkielmassa esitellään euklidisen avaruuden äärellisille Borel-mitoille Fourier-muunnokset kompleksiarvoisina kuvauksina ja tutkitaan niiden vähenemistä mentäessä ääarettömän kauas origosta. Keskeisenä kysymyksenä on, millä reunaehdoilla annetun kompkatikantajaisen ja äärellisen Borel-mitan Fourier muunnos vähenee polynomiaalisesti (eli sitä voidaan dominoida jollain euklidisen normin negatiivisella potenssilla) kaikkialla riittävän kaukana tai ainakin ”keskimääräisesti”. Mikäli tällainen Borel-mitta on absoluuttisesti jatkuva Lebesguen mitan suhteen kompaktikantajaisella ja sileällä tiheysfunktiolla, niin sen Fourier-muunnos vähenee aina polynomiaalisesti kaikkialla. Ongelmaa tarkastellaa…

Aerobic fitness, but not physical activity, is associated with grey matter volume in adolescents.

2019

Higher levels of aerobic fitness and physical activity are linked to beneficial effects on brain health, especially in older adults. The generalizability of these earlier results to young individuals is not straightforward, because physiological responses (such as cardiovascular responses) to exercise may depend on age. Earlier studies have mostly focused on the effects of either physical activity or aerobic fitness on the brain. Yet, while physical activity indicates the amount of activity, aerobic fitness is an adaptive state or attribute that an individual has or achieves. Here, by measuring both physical activity and aerobic fitness in the same study, we aimed to differentiate the assoc…

Kuva, havainto ja todellisuus : todellisuudesta ja kuvasta muodostuvat havainnot sekä niiden vastaavuus kuvioiden, objektien, tilan ja syvyyden suhte…

2000

Monitoring peatland water table depth with optical and radar satellite imagery

2022

Peatland water table depth (WTD) and wetness have widely been monitored with optical and synthetic aperture radar (SAR) remote sensing but there is a lack of studies that have used multi-sensor data, i.e., combination of optical and SAR data. We assessed how well WTD can be monitored with remote sensing data, whether multi-sensor approach boosts explanatory capacity and whether there are differences in regression performance between data and peatland types. Our data consisted of continuous multiannual WTD data from altogether 50 restored and undrained Finnish peatlands, and optical (Landsat 5–8, Sentinel-2) and Sentinel-1 C-band SAR data processed in Google Earth Engine. We calculated rando…