Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Heikki Ahola"'
Publikováno v:
Ambiência, Vol 4, Iss Especial, Pp 171-180 (2008)
Data from ALOS/Palsar and TerraSAR-X were used to estimate forest biomass in Boreal forest zone in Finland. In the study site in Heinavesi (forest biomass between 0 and 255 tons/ha), the HH-polarised componentof dual-polarised ALOS/Palsar produced bi
Externí odkaz:
https://doaj.org/article/4c8116a8b07d4597a6dfa1564e901087
Publikováno v:
Antropov, O, Rauste, Y, Ahola, H & Häme, T 2013, ' Stand-level stem volume of boreal forests from spaceborne SAR imagery at L-Band ', IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 6, no. 1, pp. 35-44 . https://doi.org/10.1109/JSTARS.2013.2241018
This paper presents a modified robust stem volume retrieval approach suitable for use with L-band SAR imagery. Multitemporal dual-polarization SAR imagery acquired by ALOS PALSAR during the summer-autumn 2007 is used in the study, along with stand-wi
Autor:
Miina Rautiainen, Tuomas Häme, Oleg Antropov, Yrjö Rauste, Laura Sirro, Heikki Ahola, S. Bounpone, Jorma Kilpi
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Häme, T, Kilpi, J, Ahola, H, Rauste, Y, Antropov, O, Rautiainen, M, Sirro, L & Bounepone, S 2013, ' Improved mapping of tropical forests with optical and SAR imagery, Part I : Forest cover and accuracy assessment using multi-resolution data ', IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 6, no. 1, pp. 74-91 . https://doi.org/10.1109/JSTARS.2013.2241019
Häme, T, Kilpi, J, Ahola, H, Rauste, Y, Antropov, O, Rautiainen, M, Sirro, L & Bounepone, S 2013, ' Improved mapping of tropical forests with optical and SAR imagery, Part I : Forest cover and accuracy assessment using multi-resolution data ', IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 6, no. 1, pp. 74-91 . https://doi.org/10.1109/JSTARS.2013.2241019
This paper describes an improved concept for the mapping of tropical forest classes with ALOS AVNIR and ALOS PALSAR data. The improvement comes from a combination of a sample of very high resolution (VHR) satellite images with medium resolution wall-
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Häme, T, Rauste, Y, Antropov, O, Ahola, H & Kilpi, J 2013, ' Improved mapping of tropical forests with optical and SAR imagery : Part II: Above ground biomass estimation ', IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 6, no. 1, pp. 92-101 . https://doi.org/10.1109/JSTARS.2013.2241020
Häme, T, Rauste, Y, Antropov, O, Ahola, H & Kilpi, J 2013, ' Improved mapping of tropical forests with optical and SAR imagery : Part II: Above ground biomass estimation ', IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 6, no. 1, pp. 92-101 . https://doi.org/10.1109/JSTARS.2013.2241020
Performance of the above ground (dry) biomass estimation with the medium resolution optical (ALOS AVNIR) data and radar (ALOS PALSAR) data was evaluated on a tropical forest site in Lao PDR (Laos). The average biomass of ground reference plots was re
Autor:
Eva Åström, Harry Holthöfer, Johanna Rinta-Valkama, Mikhail Gylling, Heikki Ahola, T. Timonen, Aaro Miettinen
Publikováno v:
Cellular and Molecular Life Sciences CMLS. 63:498-504
When nephrin, the protein product of NPHS1, was cloned, it was proposed to be specific for the kidney glomerular podocytes. Recently, however, new reports have emerged verifying additional nephrin expression sites, particularly the insulin-producing
Publikováno v:
Biochemical and Biophysical Research Communications. 300:364-370
NPHS1 encodes nephrin, the core protein of the interpodocyte slit diaphragm of the kidney glomerulus. NPHS1 is the causative gene for congenital nephrotic syndrome of the Finnish type (CNF) with massive, treatment resistant proteinuria. We report her
Publikováno v:
Kidney International. 61:141-147
Patterns of nephrin and a new proteinuria-associated protein expression in human renal diseases. Background Many factors contribute to the pathogenesis of glomerular proteinuria, but no exact molecular mechanisms are known to date. The recently repor
Publikováno v:
Scopus-Elsevier
Background: The fourth complex of the mitochondrial respiratory chain, cytochrome-c oxidase (CytC) consists of thirteen both mitochondrially and nuclearly encoded subunits, which are differently regulated in proteinuric kidneys. The effect of mitocho
Publikováno v:
Rauste, Y, Astola, H, Ahola, H, Häme, T & von Poncet, F 2010, Dual-band radar estimation of stem volume in Boreal forest . in Proceedings of the ESA Living Planet Symposium, Bergen, Norway . European Space Agency (ESA), Noordwijk, ESA Special Publication, vol. 686, ESA Living Planet Symposium 2010, Bergen, Norway, 28/06/10 . < https://publications.vtt.fi/julkaisut/muut/2010/2_1_2_5raus.pdf >
VTT Technical Research Centre of Finland-PURE
VTT Technical Research Centre of Finland-PURE
Forest stem volume information is needed in planning of sustainable forestry, mapping of exploitable forest resources, carbon balance studies and many other environmental applications. Radar sensors offer an efficient and weather-independent means fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::49c8c4cd16f9aafbbdf4d5ed3b95a825
https://cris.vtt.fi/en/publications/d275d1a3-037a-47c3-a733-26b2ec3472d4
https://cris.vtt.fi/en/publications/d275d1a3-037a-47c3-a733-26b2ec3472d4
Autor:
Heikki Ahola, Tor Meinander
Publikováno v:
Review of Scientific Instruments. 63:372-375
A hybrid undulator for generation of high brilliance synchrotron radiation in the photon energy range of 60–600 eV at the 550 MeV electron storage ring MAX in Lund, Sweden has been designed and built at the Technical Research Centre of Finland in c