Search results for "Fysiikka"
showing 10 items of 1348 documents
Prospects for detecting the diffuse supernova neutrino background with JUNO
2022
We present the detection potential for the diffuse supernova neutrino background (DSNB) at the Jiangmen Underground Neutrino Observatory (JUNO), using the inverse-beta-decay (IBD) detection channel on free protons. We employ the latest information on the DSNB flux predictions, and investigate in detail the background and its reduction for the DSNB search at JUNO. The atmospheric neutrino induced neutral current (NC) background turns out to be the most critical background, whose uncertainty is carefully evaluated from both the spread of model predictions and an envisaged in situ measurement. We also make a careful study on the background suppression with the pulse shape discrimination (PSD) …
Sub-percent precision measurement of neutrino oscillation parameters with JUNO
2022
Feasibility and physics potential of detecting 8B solar neutrinos at JUNO
2021
The Jiangmen Underground Neutrino Observatory (JUNO) features a 20 kt multi-purpose underground liquid scintillator sphere as its main detector. Some of JUNO's features make it an excellent location for B-8 solar neutrino measurements, such as its low-energy threshold, high energy resolution compared with water Cherenkov detectors, and much larger target mass compared with previous liquid scintillator detectors. In this paper, we present a comprehensive assessment of JUNO's potential for detecting B solar neutrinos via the neutrino-electron elastic scattering process. A reduced 2 MeV threshold for the recoil electron energy is found to be achievable, assuming that the intrinsic radioactive …
Thermodynamics of a Phase-Driven Proximity Josephson Junction
2019
We study the thermodynamic properties of a superconductor/normal metal/superconductor Josephson junction {in the short limit}. Owing to the proximity effect, such a junction constitutes a thermodynamic system where {phase difference}, supercurrent, temperature and entropy are thermodynamical variables connected by equations of state. These allow conceiving quasi-static processes that we characterize in terms of heat and work exchanged. Finally, we combine such processes to construct a Josephson-based Otto and Stirling cycles. We study the related performance in both engine and refrigerator operating mode.
Nb based Josephson junctions subgap transport phenomena
2005
Etiikan ja metafysiikan yhteydestä
2008
"Ensimmäiseksi filosofiaksi" mainittu, Aristoteleen termein "olevaa olevana" ja sen yleisimpiä määreitä tutkiva metafysiikka sekä hyvää elämää ja moraalisesti oikeaa ja väärää tutkiva etiikka on perinteisesti erotettu toisistaan kahdeksi selkeästi erilliseksi filosofian osa-alueeksi. Ensin mainittu kuuluu teoreettiseen ja jälkimmäinen käytännölliseen filosofiaan. Erottelu ei kuitenkaan ole ongelmaton. Voisi olla kiinnostavampaa ja (meta)filosofisesti hedelmällisempää tarkastella etiikkaa ja metafysiikkaa tiiviimmin toisiinsa liittyneinä, jopa erottamattomasti yhteen kietoutuneina. Yhden kiinnostavan esimerkin tällaisesta yhteenkietoutumisesta tarjoaa Kantin oppi käytännöllisen järjen postul…
Emanuele Coccia: Kasvien elämä
2020
Kirja-arvostelu teoksesta Emanuele Coccia: Kasvien elämä, sekoittumisen metafysiikkaa, suom. Jussi Palmusaari, Tutkijaliitto 2020. nonPeerReviewed
Runar Viktor Gåsström : fyysikko kylmän sodan aikakaudelta
2020
Stability of solution for Rao-Nakra sandwich beam model with Kelvin-Voigt damping and time delay
2022
This paper deals with stability of solution for a one-dimensional model of Rao?Nakra sandwich beam with Kelvin?Voigt damping and time delay given by ??1?1?????? ? ??1?1?????? ? ??(??? + ?? + ??????) ? ?????????? ? ??????????( ? , ?? ? ??) = 0, ??3?3?????? ? ??3?3?????? + ??(??? + ?? + ??????) ? ?????????? = 0, ????????? + ?????????????? ? ????(??? + ?? + ??????)?? ? ?????????? = 0. A sandwich beam is an engineering model that consists of three layers: two stiff outer layers, bottom and top faces, and a more compliant inner layer called ?core layer?. Rao?Nakra system consists of three layers and the assumption is that there is no slip at the interface between contacts. The top and bottom lay…
Kompakti automatisoitu laser-ionisointijärjestelmä
2011
In an experimental nuclear physics off-line systems are often used in situations where acceleration energies are relatively small. Main benefits are low price and meager radiated laboratory enviroments. In this master’s thesis I discuss mostly about automation which was used in our off-line system. The system was built at the Ion Guide Separator On-Line facility (IGISOL) in Jyväskylä University. The automation set up was made with the Phoenix Contacts inline terminals, which were programmed by using the Labview program. The system consists of thermistor, skimmer handling, mirror handling, gasline parts per billion (ppb) mixing and quadrupole mass spectrometer measurement. There were major p…