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Showing 1 to 20 of 37 for “"vlt"”.
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Grisms und Wollaston-Prismen für die IR-Kamera CONICA (VLT)
… für den Einsatz am 'Very Large Telescope' (VLT) in der hochauflösenden IR-Kamera CONICA ({Co}ude {N}ear {I}nfrared {Ca}mera) optimiert und mit Hilfe anschließender experimenteller Tests überprüft. Es wird eine Auswahl an technisch realisierbaren Grisms und Wollaston-Prismen diskutiert und …
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The VIMOS-VLT Deep Survey: the evolution of type-1 AGN
… understood. In the context of the VVDS (VIMOS-VLT Deep Survey), we collected and studied an unbiased sample of spectroscopically selected faint type-1 AGN with a unique and straightforward selection function. Indeed, the VVDS is a large, purely magnitude limited spectroscopic survey of faint …
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Commissioning of the Adaptive Optics System NAOS-CONICA for the VLT : the way to First Light
In October 2002 NAOS-CONICA, one of the most powerful adaptive optics systems was offered to the astronomical community. The instrument is installed at the Very Large Telescope in Chile and operated by the European Southern Observatory. The adaptive optics system NAOS corrects for atmospheric …
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Factors Affecting Knowledge Sharing in Virtual Learning Teams (VLTs) in Distance Education
… in distance education virtual learning teams (VLTs) is important for successful collaborative learning and that various factors characterizing person and environment can impact VLT members' knowledge sharing behavior. Factors under the category of person are VLT members' competencies for …
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Ventilation liquidienne totale et syndrome d'aspiration méconiale sévère
… de mortalité. La ventilation liquidienne totale (VLT) est considérée comme une avenue thérapeutique prometteuse de lavage bronchoalvéolaire (LBA) effectué avec un perfluorocarbone dans le cas d'un SAM sévère. L'équipe Inolivent a développé récemment un 4 e prototype de ventilateur liquidien total …
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Conséquences hémodynamiques de l'application de la Ventilation Liquidienne Totale (VLT) dans un modèle expérimental de syndrome de détresse respiratoire aigue (SDRA) chez l'agneau nouveau-né
… Parmi les différentes solutions proposées, la VLT qui utilise les PerFluoroCarbones (PFC) comme vecteur des échanges gazeux offre de nombreux avantages par rapport à la VMC. Cependant, les effets hémodynamiques de la VLT restent controversés et n'ont été que très peu étudiés. L'objectif …
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Compliant Epitaxy of Iii-V Compound Semiconductors for Optoelectronic Device Applications
… very-low temperature molecular beam epitaxy (VLT-MBE) which involves growth of amorphous and polycrystalline materials. Using GaP and laterally oxidized AlAs materials, substrate independent DBRs were fabricated at wavelengths in both the visible spectrum, 480 nm to 550 nm, as well as those …
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Chromospheric activity and lithium abundance in the NGC2516 and NGC3766 open clusters
… acquired by the ESO spectrograph FLAMES at VLT, in the LiI and CaII H and K region. Most of our knowledge of young stars comes from the observations of general properties of open clusters, since they represents a good tool for testing the stellar evolution models, and the age measurement' …
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Spectroscopic studies of star-forming galaxies and the intergalactic medium in the early Universe
… facilities, such as the Very Large Telescope (VLT), Hubble Space Telescope (HST), and Atacama Large Millimeter/submillimeter Array (ALMA), have enabled us to perform detailed spectroscopic analyses of distant galaxies well into the Epoch of Reionisation (EoR). This crucial phase transition …
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Super star cluster candidates in the star-forming regions of luminous infrared galaxies
… adaptive optics imaging with GEMINI/ALTAIR and VLT/NACO instruments. The evolution of the cosmic star formation rate (CSFR) indicates its rapid decline in the local Universe.
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Comparing the Receptive Vocabulary Knowledge of Intermediate-level Students of Different Native languages in an Intensive English Program
… and 5K levels from the Vocabulary Levels Test (VLT) were used as a vocabulary measure. In this study, VLT scores were analyzed by proficiency level and by students' original individual classes (N=7). The results revealed considerable vocabulary variation. In some instances, vocabulary size …
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A CCD based curvature wavefront sensor for Adaptive Optics in Astronomy
… in Garching werden für das Very Large Telescope (VLT) und das VLT Interferometer (VLTI) eine Reihe von adaptiven Optiksystemen entwickelt, die den Curvature - Wellenfrontsensor verwenden. Bisher wurden in Curvature AO-Systemen Avalanche Photodioden (APDs) als Detektoren verwendet, da sehr kurze …
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The Effects of Uphill vs. Level-Grade High-Intensity Interval Training on Key Physiological Indices of Distance Running
… Interval Training on VO2max, VMax, VLT and TMax in Well- Trained Distance Runners, addresses two key physiological determinants associated with distance running performance—VO2max and velocity at lactate threshold (VLT); while Chapter 4, The Effects of Uphill and Level-Grade …
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Interaction between Galaxies and the Intergalactic Medium at z = 3
… functions. We use the combined data from the VLT LBG Survey (Bielby, 2008) and the Keck survey (Steidel, 2003) to measure the LBG-LBG correlation function. We aim to estimate the infall parameter, β from the ratio of LBG-LBG correlation function in redshift space, ξ (s), and in real space, ξ …
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A spectroscopic and photometric study of stellar populations in a sample of clusters in the Magellanic Clouds
… the optical high-resolution spectrograph FLAMES@VLT (ESO, Paranal) and 4 very young (<30 Myr) clusters (3 in the LMC and 1 in the SMC) with the near-infrared high-resolution spectrograph CRIRES@VLT. • The study of the photometric properties of the main evolutive sequences in optical Color- …
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How Do Quasars Impact Their Host Galaxies? From the Studies of Quasar Outflows in Absorption and Emission
… Digital Sky Survey and Very Large Telescopes (VLT), we determined various physics properties of quasar absorption outflows, e.g., the electron number density ((n<sub>e</sub>), the distance of outflows to the central quasar (𝑅), and the kinetic energy carried by the outflow (𝐸̇<sub>k</sub>). We …
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Ly alpha emission galaxies in the FORS Deep Field
VLT/FORS-Spektren mit einer Aufloesung von A = 2000 von 18 Galaxien mit einer Rotverschiebung von z = 2.7 bis 5 werden praesentiert. Die Sternentstehungsraten der 18 Galaxien reichen von 2 bis 60 Msun/yr und ihre effektiven Radien von r < 0.2 bis 1.8 kpc. Der Vergleich mit synthetischen Spektren …
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The FORS Deep Field Spectroscopic Survey
… up to 5.0 with the FORS instruments at the VLT telescopes. The galaxies were selected from the photometric redshift catalogue of the FORS Deep Field (FDF). To achieve an optimal reduction of the spectra of these very faint objects special reduction packages were developed. Redshifts and …
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Quantitative analysis and modulation of the spatial operation of the EGF receptor autocrine cell signaling system
… ratio between the rate of ligand production (VLT) and the rate of receptor production (VR). At a VLTNR ratio of < 0.3, essentially no ligand was found in the extracellular medium, but a significant number cell receptors (30-40%) were occupied. As the VLTNR ratio increased from 0.3 towards …
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The Formation of Brown Dwarfs
… nine out of the twelve objects with UVES at the VLT, radial and rotational velocities have been measured with high accuracy. A kinematic study of the sample showed that their radial velocity dispersion is relatively small (2.2 kms). It is significantly smaller than the radial velocity dispersion …
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