Search results for "Oak"
showing 10 items of 181 documents
Erkki Kurenniemi : musiikin ja teknologian avantgardisti
2019
Erkki Kurenniemi (10.7.1941 – 1.5.2017) on kansainvälisesti tunnetuimpia suomalaisia musiikin avantgardisteja. Kuitenkin kesti kauan ennen kuin hänen arvonsa Suomessa tunnustettiin. Vasta 2000-luvulla häntä palkittiin ja hänen tuotantoaan ja toimintaansa alettiin laajemmin tutkia. Kurenniemen toimintakenttä taiteen alalla oli laaja käsittäen elektronisia soittimia ja sävellyksiä, elokuvia, mediataidetta ja tiedefantasioita. Kurenniemi oli koulutukseltaan fyysikko. Tässä artikkelissa luodaan yleiskatsaus Kurenniemen toimintaan ja saavutuksiin musiikin, taiteen ja teknologian aloilla, mutta perehdytään myös hänen teoreettisiin pohdiskeluihinsa, jotka ovat jääneet vähemmälle huomiolle. nonPeer…
Experimental characterization of Ruthenium-based Dye Sensitized Solar Cells and study of light-soaking effect impact on performance
2016
In this paper, we present an experimental investigation on the performance of Ruthenium-based Dye Sensitized Solar Cells (DSSCs) at different irradiance levels, incident wavelengths and hours of illumination. In particular, the measurements have been aimed at studying the performance variation due to light soaking effect since this phenomenon has noteworthy practical implications, such as stability tests of DSSCs. Our results show that the short circuit current density, the open circuit voltage and the conversion efficiency η increase with the hours of light soaking. Finally, the observed phenomenon is reversible, and thus the performance decreases again when the cell is kept in the dark.
The Protected Species of Lepidoptera in the Oak Forest "Dumbrava Sibiului", Romania
2011
This paper presents the results of research on Lepidoptera fauna of protected forest located Dumbrava Sibiu, near Sibiu city . The theme of the work is included in a study of forest biodiversity and Sibiu Lepidoptera "Dumbrava Sibiului" is part of a school project postdoctoral lasted several months in the forest.
 The first data on Lepidoptera fauna of the forest were reported by Daniel Czekelius collection and analysis covers a total of 45 species collected from the surrounding forest. An important contribution collections were then collected in the Transylvanian Saxons in 1009 and until around 1960 years and have made such an important contribution to knowledge of this group of insec…
Analysing the origins of the strong variability of impact by Tischeria ekebladella, a common mining moth on oak leaves.
2015
Tischeria ekebladella (Lepidoptera : Gracillariidae) is a common moth with its caterpillar often mining oak leaves, morerarely chestnut leaves. As a rule, the mining impact of the species exhibits strong variations according to locations,inviting to investigate quantitatively the respective contributions of the three main factors that regulate the level of minesdensity within host. As the direct monitoring in the fi eld of these governing factors is very diffi cult (when not virtuallyimpossible), we use a newly designed procedure (“MELBA”) which allows tracing back to these factors indirectly, on thebasis of posterior, easily recorded data (in terms of the histogram of the distribution of t…
Järvisedimenttien iänmääritys lyijyajoituksella
2013
Radioaktiivisuudella tarkoitetaan epästabiilin ytimen hajoamista toiseksi ytimeksi. Käytännössä ydin voi hajota kolmella perusprosessilla; alfa-, beeta tai gammahajoamisella, joista gammahajoamisessa virittyneen ytimen viritystila purkautuu emittoimalla gammahiukkasen, fotonin, jonka energia vastaa viritystilan tai viritystilojen välistä energiaa. Lyijyn isotoopin 210Pb (puoliintumisaika noin 22 vuotta) gammahajoamiseen perustuvalla lyijyajoituksella voidaan määrittää järvenpohjien sedimenttikerrosten ikä syvyyden funktiona. Sedimentteihin 210Pb kertyy kahdella tavalla: hajoamalla radioaktiivisesti maaperässä olevasta radiumista sekä ilmakehästä suoraan esimerkiksi sateiden välityksellä tai…
Aphyllophoraceous wood-inhabiting fungi on Quercus spp. in Italy
2008
240 species representing 100 genera of aphyllophoraceous fungi growing on Quercus spp. in Italy are listed. Some species are considered rare or infrequent in Italy, e.g. Bulbillomyces farinosus, Dendrothele dryina, Fomitopsis iberica, F. spraguei, Hyphoderma incrustatum, Inonotus andersonii.
Naturalistic music and dance: Cortical phase synchrony in musicians and dancers
2018
Expertise in music has been investigated for decades and the results have been applied not only in composition, performance and music education, but also in understanding brain plasticity in a larger context. Several studies have revealed a strong connection between auditory and motor processes and listening to and performing music, and music imagination. Recently, as a logical next step in music and movement, the cognitive and affective neuro-sciences have been directed towards expertise in dance. To understand the versatile and overlapping processes during artistic stimuli, such as music and dance, it is necessary to study them with continuous naturalistic stimuli. Thus, we used long exce…
The effect of chronic low-dose environmental radiation on organ mass of bank voles in the Chernobyl Exclusion Zone
2020
Purpose: Animals are exposed to environmental ionizing radiation (IR) externally through proximity to contaminated soil and internally through ingestion and inhalation of radionuclides. Internal organs can respond to radioactive contamination through physiological stress. Chronic stress can compromise the size of physiologically active organs, but studies on wild mammal populations are scarce. The effects of environmental IR contamination on organ masses was studied by using a wild rodent inhabiting the Chernobyl Exclusion Zone (CEZ). Material and Methods: The masses of brain, heart, kidney, spleen, liver and lung were assessed from bank voles (Myodes glareolus) captured from areas across r…
Fractionating auditory priors: A neural dissociation between active and passive experience of musical sounds
2019
Learning, attention and action play a crucial role in determining how stimulus predictions are formed, stored, and updated. Years-long experience with the specific repertoires of sounds of one or more musical styles is what characterizes professional musicians. Here we contrasted active experience with sounds, namely long-lasting motor practice, theoretical study and engaged listening to the acoustic features characterizing a musical style of choice in professional musicians with mainly passive experience of sounds in laypersons. We hypothesized that long-term active experience of sounds would influence the neural predictions of the stylistic features in professional musicians in a distinct…
Matalien taajuuksien fysiologiset ja psykologiset vaikutukset ihmiseen
2012
Tutkimus on luonteeltaan kirjallisuuskatsaus, joka paneutuu tarkastelemaan matalia taajuuksia ja sen vaikutuksia. Vaikutusten tarkastelu on jaettu fysiologisiin ja psykologisiin vaikutuksiin. Ihmisen kehon ominaistaajuudet ovat matalia taajuuksia eli pääosin alle 113 Hz. Matalat taajuudet resonoivat ihmisen kehon ja elinten ominaistaajuuksien kanssa, jonka vuoksi niillä on vaikutusta ihmiseen. Matalia taajuuksia hyödynnetään ihmisten hoitamisessa, josta esimerkkinä on fysioakustinen terapia. Matalia taajuuksia voidaan käyttää myös ääniaseissa, jolloin niiden tarkoituksena on häiritä ihmistä. Matalia taajuuksia esiintyy myös jatkuvasti arkielämässä erilaisen melun muodossa. Tutkielman perust…