405 resultados para Pulkkinen, Tuija
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Kirjallisuusarvostelu
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Kirjallisuusarvostelu
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Seloste artikkelista: The extent of south-north pollen transfer in Finnish Scots pine / Saila Varis ... [et al.] - Julkaisussa: Silva Fennica 43 (2009) : 5, s. 717-726.
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Elokuva-arvostelu
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The work reported in this thesis is dedicated to irreversible magnetic properties in pyrolytic nanocarbon samples. Based on atomic force microscope images, the samples consist of carbon clusters with radius 30..120 nm. These are treated as single-domain nanoparticles. Magnetic hysteresis, field cooled, zero field cooled and thermoremanent magnetization measurements were performed using an RF SQUID magnetometer and ferromagnetic behaviour was observed. Analysis suggests that the ferromagnetic ordering is associated with defects in a thin surface layer, whose thickness is independent of particle size. Critical radius for single-domain particles, critical radius for coherent rotation, magnetic layer thickness, distance between elementary magnetic moments, saturation magnetization, exchange stiffness constant and anisotropy energy density are also presented.
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Tuija Siimeksen esitys Painetun aineiston saatavuus -seminaarissa 2.11.2011 Helsingissä
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Seloste artikkelista: Nieminen, M., Ahti, E., Koivusalo, H., Mattson, T., Sarkkola, S. & Laurén, A. / Export of suspended solids and dissolved elements from peatland areas after ditch network maintenance in south-central Finland. Silva Fennica 44 (2010) : 1, 39-49.
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Kirja-arvio
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Kirja-arvio
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Kirja-arvio