Search results for "Open"

Nonlinear dissipation phenomena in optomechanics

2016

Yksikään kvanttisysteemi ei voi olla täysin eristetty ympäristöstään, mikä johtaa informaation välittymiseen systeemin ja ympäristön välillä. Optomekaniikassa, missä tyypillinen tutkittava systeemi on peileistä koostuva optinen kaviteetti yhdistettynä mekaaniseen värähtelijään, systeemin ja ympäristön lineaarisesta kytkennästä johtuvat dissipaatioilmiöt ovat hyvin tunnettuja. Epälineaarisia ilmiöitä ei kuitenkaan ymmärretä yhtä laajasti. Tutkin epälineaarista kytkentää kaviteetin ja lämpökylvyn välillä ja havainnollistan tästä kytkennästä johtuvia ilmiöitä kuten epälineaarista dissipaatiota. Esitän myös optisen kaviteetin epälineaarisen dissipaation oikeuttavan mallin, missä optinen kavitee…

Normatywność pedagogiki chrześcijańskiej w świetle pytań o jej empiryczne podstawy

2018

Problem normatywności w pedagogice wynika wprost ze struktury tej dyscypliny wiedzy. Wbrew obiegowym opiniom, formułowanie celów wychowania wcale nie musi przekreślać możliwości ich empirycznego uzasadniania. Należy bowiem odróżniać normatywność na płaszczyźnie metateoretycznej od normatywności na płaszczyźnie teoretycznej. Brak tego odróżnienia sprawia, że pedagogice chrześcijańskiej przypisuje się apodyktyczny sposób uzasadniania norm wychowania. Faktycznie w historii pedagogika ta była tak uprawiana. Statyczne koncepcje inspiracji chrześcijańskiej zostały z czasem zastąpione dynamicznymi. Poszukiwanie empirycznych sposobów uzasadniania norm wychowania w pedagogice chrześcijańskiej dokona…

Sarcopenia, sarcopenic obesity and insulin-resistance

2011

Attēla fona atdalīšanas metodes objektu izsekošanai

2016

Objektu atpazīšana un izsekošana ir fundamentāla problēma attēlu apstrādes un video analīzes nozarē. Sasniegtie risinājumi ir svarīgi tālākā attēlu un video materiālu automatizētā analīzē, piemēram, video novērošanas sistēmās, cilvēka-datora saskarnēs, dažādu procesu automatizēšanā un citās nozarēs. Bakalaura darbā “Attēla fona atdalīšanas metodes objektu izsekošanai” tiek apskatītas metodes objektu detektēšanai un izsekošanai, galveno uzsvaru liekot uz fona atdalīšanas metodēm objektu detektēšanai. Metodes tiek aprakstītas teorētiski un izmēģinātas praktiski. Tiek izstrādāta primitīva sistēmai, kas var izsekot kustīgus objektus. Tā balstīta uz fona atdalīšanas metodēm un objekta kustības m…

Gaia-ESO Survey: Cha I members

2017

Investigating the physical mechanisms driving the dynamical evolution of young star clusters is fundamental to our understanding of the star formation process and the properties of the Galactic field stars. The young (~2Myr) and partially embedded cluster Chamaeleon I is one of the closest laboratories to study the early stages of star cluster dynamics in a low-density environment. The aim of this work is to study the structural and kinematical properties of this cluster combining parameters from the high-resolution spectroscopic observations of the Gaia-ESO Survey with data from the literature. Our main result is the evidence of a large discrepancy between the velocity dispersion ({sigma}_…

Gaia-ESO Survey. Trumpler 23

2017

Trumpler 23 is a moderately populated, intermediate-age open cluster within the solar circle at a R_GC_~6kpc. It is in a crowded field very close to the Galactic plane and the color-magnitude diagram shows significant field contamination and possible differential reddening; it is a relatively understudied cluster for these reasons, but its location makes it a key object for determining Galactic abundance distributions. New data from the Gaia-ESO Survey enable the first ever radial velocity and spectroscopic metallicity measurements for this cluster. We aim to use velocities to isolate cluster members, providing more leverage for determining cluster parameters. Gaia-ESO Survey data for 167 p…

Gaia-ESO Survey: Li-rich stars in NGC2547

2015

The nearby (distance ~350-400pc), rich Vela OB2 association, includes gamma^2^ Velorum, one of the most massive binaries in the solar neighborhood, and is an excellent laboratory for investigating the formation and early evolution of young clusters. Recent Gaia-ESO survey observations led to the discovery of two kinematically distinct populations in the young (10-15Myr) cluster immediately surrounding gamma^2^ Velorum. Here we analyse the results of Gaia-ESO survey observations of NGC 2547, a 35Myr cluster located two degrees south of gamma^2^ Velorum. The radial velocity distribution of lithium-rich pre-main sequence stars shows a secondary population, kinematically distinct and younger th…

Photometry of candidate members of NGC6611

2009

We present the list of candidate members of the young open cluster NGC 6611, selected in a field of view of 33'x34' by the X-rays emission and excesses in infrared bands. X-ray sources without infrared excesses are classified as candidate Class III cluster members; stars with infrared excesses as disk bearing members. Cone search capability for table J/A+A/496/453/catalog (NGC 6611 cluster member positions and magnitudes)

XMM observations of IC 2391 stars

2006

We present X-ray spectral and timing analysis of members of the young open cluster IC 2391 observed with the XMM-Newton observatory. We detected 99 X-ray sources by analysing the summed data obtained from MOS1, MOS2 and pn detectors of the EPIC camera; 24 of them are members, or probable members, of the cluster. Stars of all spectral types have been detected, from the early-types to the late-M dwarfs. Cone search capability for table J/A+A/430/287/table1 (XMM-Newton sources in the IC 2391 region, as detected in the combined EPIC image.) Cone search capability for table J/A+A/430/287/table2 (X-ray and optical properties of IC 2391 members, and upper limits in the combined EPIC image.)

uvby{beta} photometry of h and chi Per

2002

We present CCD uvby{beta} photometry for stars in the nuclei of the young double cluster {h} and {chi} Persei. We find that the reddening is highly variable through the {h} Per nucleus, increasing from west to east, with values ranging from E(b-y)=0.328+/-0.022 in the western part to E(b-y)=0.465+/-0.025 in the south-east. Towards {chi} Persei the reddening is fairly constant, with E(b-y)=0.398+/-0.025. Both clusters share a common distance modulus of 11.7+/-0.1mag, and an age of logt=7.10+/-0.05 years. Cone search capability for table J/A+A/394/479/table6 (Coordinates and photometry for stars in h Per) Cone search capability for table J/A+A/394/479/table7 (Coordinates and photometry for st…