Zobrazeno 1 - 10
of 880
pro vyhledávání: '"J. Kangas"'
Autor:
Matti Maltamo, J. Räty, L. Korhonen, E. Kotivuori, M. Kukkonen, H. Peltola, J. Kangas, P. Packalen
Publikováno v:
European Journal of Remote Sensing, Vol 53, Iss 1, Pp 245-257 (2020)
This study evaluated the suitability of different airborne laser scanning (ALS) datasets for the prediction of forest canopy fuel parameters in managed boreal forests in Finland. The ALS data alternatives were leaf-off and leaf-on unispectral and lea
Externí odkaz:
https://doaj.org/article/636f8e52e5d1468aa5139cd30538cc4a
Publikováno v:
BMC Musculoskeletal Disorders, Vol 20, Iss 1, Pp 1-8 (2019)
Abstract Background The development of total knee replacement (TKR) implant designs aims to improve outcome regarding pain, function, joint stiffness, instability, patellar problems, and ultimately wear of the implant. Recently, two major orthopaedic
Externí odkaz:
https://doaj.org/article/151c73de67b040febd353b2d477156f6
Publikováno v:
Annales Geophysicae, Vol 22, Pp 643-651 (2004)
On 2 December 1999, the magnetometer stations in northern Finland registered structured Pc1 activity simultaneously in three distinct frequency bands. Using simultaneous EISCAT radar measurements of the high-latitude ionosphere, we have studied the
Externí odkaz:
https://doaj.org/article/4dba599b27494123879b04ef82abafef
Autor:
T. A. Yahnina, A. G. Yahnin, J. Kangas, J. Manninen, D. S. Evans, A. G. Demekhov, V. Yu. Trakhtengerts, M. F. Thomsen, G. D. Reeves, B. B. Gvozdevsky
Publikováno v:
Annales Geophysicae, Vol 21, Pp 2281-2292 (2003)
Using the low-altitude NOAA satellite particle data, we study two kinds of localised variations of energetic proton fluxes at low altitude within the anisotropic zone equatorward of the isotropy boundary. These flux variation types have a c
Externí odkaz:
https://doaj.org/article/2ce77725d020429b869b6cfadbf23126
Publikováno v:
Annales Geophysicae, Vol 21, Pp 779-786 (2003)
Continuous observations of fluctuations of the geomagnetic field at Sodankylä Geophysical Observatory (L = 5.2) were used for a comprehensive morphological study of the spectral resonance structure (SRS) seen in the background electromagnetic
Externí odkaz:
https://doaj.org/article/08b08832594c4cb6af6a44b117463826
Publikováno v:
Annales Geophysicae, Vol 20, Pp 1751-1761 (2002)
We present the results of analysis of the dayside magnetic pulsation response to a sudden change in solar wind dynamic pressure. We concentrate on the events when a burst or a series of short-lived bursts in the Pc1 frequency range with the rep
Externí odkaz:
https://doaj.org/article/9d3e7c9e493440438a6138dc65dc5c14
Publikováno v:
Annales Geophysicae, Vol 19, Pp 699-706 (2001)
We described the ground signatures of dynamic substorm features as observed by the imaging riometer, magnetometers and all-sky camera (ASC) at Kilpisjärvi, Finland on 5 and 25 October 1999 during the late evening hours. The magnetometer data w
Externí odkaz:
https://doaj.org/article/47edef5340d74a9fab89c000858dc049
Autor:
F. Z. Feygin, N. G. Kleimenova, O. A. Pokhotelov, M. Parrot, K. Prikner, K. Mursula, J. Kangas, T. Pikkarainen
Publikováno v:
Annales Geophysicae, Vol 18, Pp 517-522 (2000)
We analyse long-lasting (several hours) Pc1 pearl pulsations with decreasing, increasing or constant central frequencies. We show that nonstationary pearl events (those with either decreasing or increasing central frequency) are observed simultane
Externí odkaz:
https://doaj.org/article/613c855dd9ea4cf4ba3b7e1b3afb837d
Publikováno v:
Annales Geophysicae, Vol 15, Pp 424-429 (1997)
A new approach to the problem of direction and distance finding of magnetospheric ULF oscillations is described. It is based on additional information about the structure of geoelectromagnetic field at the Earth's surface which is contained in the
Externí odkaz:
https://doaj.org/article/bfbc1b9fe259462294c6e1ab7de8f3bb
Publikováno v:
Annales Geophysicae, Vol 12, Pp 147-151 (1994)
A fair fraction of Pc1 pulsation events observed on the ground includes more than one simultaneous pulsation band. In most such multiband events the bands display different characteristics and, therefore, come from different source regions via hor
Externí odkaz:
https://doaj.org/article/30051dc339c24e2dafa7ac43fe7bf484