42 research outputs found
MATHEMATICAL SIMULATION OF CONTINUNOUS GAS CHROMATOGRAPHY I. A SET OF GENERAL DIFFERENTIAL EQUATIONS DESCRIBING THE BEHAVIOUR OF A CONTINUOUS CHROMATOGRAPHIC COLUMN
INVESTIGATION OF THE OXIDATION MECHANISM OF SULPHUR DIOXIDE ON VANADIUM CATALYSTS. I. THE CHANGE IN ACTIVATION ENERGY WITH TEMPERATURE
INVESTIGATIONS BY THERMOGRAVIMETRY INTO THE HYDRATION PROCESSES IN TRICALCIUM ALUMINATE AND TRICALCIUM ALUMINATE-GYPSUM MIXTURES
Egy Ășj, feltehetĆen tĂĄvol-keleti eredetƱ galandfĂ©reg, az Atractolytocestus huronensis elĆfordulĂĄsa MagyarorszĂĄgon tenyĂ©sztett pontyok belĂ©ben
Data Acquisition and Management in the Calibration Processes of the CMS Barrel Muon Alignment System
In order to be able to match correctly the track elements produced by a muon in the Tracker and the Muon System of the CMS experiment [1] the mutual alignment precision between the Tracker and the Barrel Muon System must be no worse than 100-400 micrometers depending on the radial distance of the muon chambers from the Tracker. To fulfill this requirement an alignment system had to be designed. This system contains subsystems for determining the positions of the barrel and endcap chambers while a third one connects these two to the Tracker. Since the Barrel muon chambers are embedded into the magnet yoke of the experiment a nonconventional alignment method had to be developed. In this paper we restrict ourselves to the Barrel Alignment System and the calibration methods of its components
A photometric monitoring of bright high-amplitude delta Scuti stars. II. Period updates for seven stars
We present new photometric data for seven high-amplitude delta Scuti stars.
The observations were acquired between 1996 and 2002, mostly in the Johnson
photometric system. For one star (GW UMa), our observations are the first since
the discovery of its pulsational nature from the Hipparcos data.The primary
goal of this project was to update our knowledge on the period variations of
the target stars. For this, we have collected all available photometric
observations from the literature and constructed decades-long O-C diagrams of
the stars. This traditional method is useful because of the single-periodic
nature of the light variations. Text-book examples of slow period evolution (XX
Cyg, DY Her, DY Peg) and cyclic period changes due to light-time effect (LITE)
in a binary system (SZ Lyn) are updated with the new observations. For YZ Boo,
we find a period decrease instead of increase. The previously suggested
LITE-solution of BE Lyn (Kiss & Szatmary 1995) is not supported with the new
O-C diagram. Instead of that, we suspect the presence of transient light curve
shape variations mimicking small period changes.Comment: 11 pages, 15 figures, accepted for publication in A&