Search results for " cloud"
showing 10 items of 294 documents
Sudrabaino mākoņu novērojumu žurnāls, 1983: Sigulda
1983
Digitalizēts mezosfēras mākoņu 1983. gada SIGULDAS novērojumu žurnāls: novērojumu sezonas naktis, novērotāji, MK identifikācija, meteoroloģiskā situācija, informācija par uzņemtajām fotogrāfijām. --//-- Mesospheric cloud observation data in Sigulda, 1983, digitized observation log: observation season nights, observers, MC identification, meteorological situation, information about the photos taken.
Sudrabaino mākoņu novērojumu žurnāls, 1979: Sigulda
1979
Digitalizēts mezosfēras mākoņu 1979. gada SIGULDAS novērojumu žurnāls: novērojumu sezonas naktis, novērotāji, MK identifikācija, meteoroloģiskā situācija, informācija par uzņemtajām fotogrāfijām. --//-- Mesospheric cloud observation data in Sigulda, 1979, digitized observation log: observation season nights, observers, MC identification, meteorological situation, information about the photos taken.
Sudrabaino mākoņu novērojumu žurnāls, 1980: Sigulda
1980
Digitalizēts mezosfēras mākoņu 1980. gada SIGULDAS novērojumu žurnāls: novērojumu sezonas naktis, novērotāji, MK identifikācija, meteoroloģiskā situācija, informācija par uzņemtajām fotogrāfijām. --//-- Mesospheric cloud observation data in Sigulda, 1980, digitized observation log: observation season nights, observers, MC identification, meteorological situation, information about the photos taken.
Post-AGB candidates in LMC and SMC SALT spectra
2020
We selected a sample of post-AGB candidates in the Magellanic Clouds on the basis of their near- and mid-infrared colour characteristics. Fifteen of the most optically bright post-AGB candidates were observed with the South African Large Telescope in order to determine their stellar parameters and thus to validate or discriminate their nature as post-AGB objects in the Magellanic Clouds. The spectral types of absorption-line objects were estimated according to the MK classification, and effective temperatures were obtained by means of stellar atmosphere modelling. Emission-line objects were classified on the basis of the fluxes of the emission lines and the presence of the continuum. Out of…
Pulsating B and Be stars in the Small Magellanic Cloud
2008
Context: Stellar pulsations in main-sequence B-type stars are driven by the kappa-mechanism due to the Fe-group opacity bump. The current models do not predict the presence of instability strips in the B spectral domain at very low metallicities. As the metallicity of the SMC is lower than Z=0.005, it constitutes a very suitable object to test these predictions. Aims: The main objective is to investigate the existence of B-type pulsators at low metallicities, searching for short-term periodic variability in absorption-line B and Be stars in the SMC. The analysis has been performed in a sample of 313 B and Be stars with fundamental astrophysical parameters accurately determined from high-res…
Collision Avoidance with Potential Fields Based on Parallel Processing of 3D-Point Cloud Data on the GPU
2014
In this paper we present an experimental study on real-time collision avoidance with potential fields that are based on 3D point cloud data and processed on the Graphics Processing Unit (GPU). The virtual forces from the potential fields serve two purposes. First, they are used for changing the reference trajectory. Second they are projected to and applied on torque control level for generating according nullspace behavior together with a Cartesian impedance main control loop. The GPU algorithm creates a map representation that is quickly accessible. In addition, outliers and the robot structure are efficiently removed from the data, and the resolution of the representation can be easily ad…
Pilvipalveluiden käyttö
2017
Tämä tutkielma perehtyy pilvipalveluihin, niiden käyttäjäryhmiin sekä syihin, miksi pilvipalveluita käytetään. Pilvipalvelut ovat internetin yli tarjottavia laitteita ja ohjelmistoja, joihin on samanaikainen pääsy eri puolilta maailmaa. Kaikilla on mahdollisuus hyödyntää pilvipalveluiden tuomia etuja niin teknisesti kuin taloudellisestikin. Mobiililaitteiden ja langattoman nettiyhteyden lisääntyvän suosion sekä koko ajan kasvavan datamäärän myötä myös pilvipalveluiden käyttö on laajentunut viime vuosina paljon. Pilvipalvelut tuovat paljon hyötyjä, jotka houkuttelevat lisää käyttäjiä. Toisaalta pilvipalveluiden varjopuolena on turvallisuus, joka mietityttää monia käyttäjiä. The usage of clou…
Robots, privacy and data protection
2015
A research on robots, drones and privacy/data protection, with focus on cloud robotics, Internet of Things, contracts and the use cases of telepresence, courier robots and smart cities quadricopters.
The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST)
2007
(abridged:) The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST) surveys the most populated ~5 square degrees of the Taurus star formation region, using the XMM-Newton X-ray observatory to study the thermal structure, variability, and long-term evolution of hot plasma, to investigate the magnetic dynamo, and to search for new potential members of the association. Many targets are also studied in the optical, and high-resolution X-ray grating spectroscopy has been obtained for selected bright sources. The X-ray spectra have been coherently analyzed with two different thermal models (2-component thermal model, and a continuous emission measure distribution model). We present ov…
Spectral properties of X-ray bright variable sources in the Taurus Molecular Cloud
2006
We analyze 19 bright variable X-ray sources detected in the XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST), in order to characterize the variations with time of their coronal properties and to derive informations on the X-ray emitting structures. We performed time-resolved spectroscopy of the EPIC PN and MOS spectra of the XEST sources, using a model with one or two thermal components, and we used the time evolution of the temperatures and emission measures during the decay phase of flares to derive the size of the flaring loops. The light curves of the selected sources show different types of variability: flares, long-lasting decay or rise through the whole observation, sl…