scholarly journals New Results from an ATCA Study of Intraday Variable Radio Sources

2002 ◽  
Vol 19 (1) ◽  
pp. 29-33 ◽  
Author(s):  
H. E. Bignall ◽  
D. L. Jauncey ◽  
L. L. Kedziora-Chudczer ◽  
J. E. J. Lovell ◽  
J.-P. Macquart ◽  
...  
Keyword(s):  
Data Analysis ◽  
Annual Cycle ◽  
Monitoring Program ◽  
Radio Sources ◽  
First Results ◽  
Observational Program ◽  
Variable Radio ◽  
Intraday Variability

AbstractWe are undertaking an observational program using the ATCA to monitor the intraday variability (IDV) of a sample of sources at 4.8 and 8.6 GHz. The sources were selected to include the known strong southern IDV sources plus a number of sources whose IDV was recently discovered. The present monitoring program will extend over a full year in order to search for any annual cycle that may be present in the long-term IDV characteristics of these sources. In this paper we discuss the observing strategy and data analysis, and present the first results from our observations.

scholarly journals Absolute Parameter Determination in Low-Mass Eclipsing Binaries. Radiative Parameters for BH VIR, ZZ UMa and CR Cas

1993 ◽  
Vol 137 ◽  
pp. 386-391
Author(s):  
R. Clement ◽  
V. Reglero ◽  
M. Garcia ◽  
J. Fabregat ◽  
A. Bravo ◽  
...  
Keyword(s):  
Radial Velocity ◽  
Monitoring Program ◽  
Mass Range ◽  
Eclipsing Binaries ◽  
Radiative Properties ◽  
Parameter Determination ◽  
Low Mass ◽  
Observational Program

AbstractA new uvby and Hβ monitoring program of low mass eclipsing binaries is currently being carried out in the framework of a 5 year observational program which also involves radial velocity determinations. The scope of this work is to provide very accurate absolute astrophysical parameters: mass, radius and effective temperatures, for main sequence late-type stars. One of the main goals is to improve the mass-luminosity relation in the low and intermediate mass range. A second objective is to perform accurate tests of the most recent grids of evolutionary models. This program is complementary to that currently being in progresss by the Copenhagen group.In this contribution we present the photometric preliminary results obtained for three of the systems included in our long term survey: BH Vir, ZZ UMa and CR Cas for which, primary eclipses have been observed. Particular attention is paid to the determination of reddening, distances and radiative properties. A more detailed study will be carried out when the light curves and radial velocity measurements are completed

scholarly journals The Araucaria project – improving stellar distance indicators

2004 ◽  
Vol 193 ◽  
pp. 87-90
Author(s):  
Grzegorz Pietrzyński ◽  
Wolfgang Gieren
Keyword(s):  
Variable Stars ◽  
Wide Field ◽  
Photometric Variability ◽  
First Results ◽  
Ngc 6822 ◽  
Distance Indicators ◽  
Field Imaging ◽  
Wide Field Imaging ◽  
Observational Program

AbstractWe present first results of an optical wide field imaging survey of the galaxies NGC 300, NGC 6822, WLM and Phoenix, performed as part of the Araucaria Project, a long-term observational program recently initiated at the Universidad de Concepción. Based on our data, a large number of new Cepheids in these galaxies has been found. Our photometric databases were also used to select blue supergiant candidates in these galaxies, and to search for the photometric variability of these stars, as well as for a number of side projects, such as the search of other types variable stars and OB associations in these galaxies.

scholarly journals Variable Radio Sources in the GB6 Catalog

1998 ◽  
Vol 164 ◽  
pp. 283-284 ◽  
Author(s):  
P. C. Gregory ◽  
W. K. Scott ◽  
B. Poller
Keyword(s):  
Radio Sources ◽  
Short Term ◽  
Variable Radio

AbstractWe report the results of a study of the long term and short term radio variability at 4.85 GHz of sources in the GB6 catalog.

scholarly journals Monitoring and analyzing exoplanetary transits from Argentina

2010 ◽  
Vol 6 (S276) ◽  
pp. 416-417
Author(s):  
Eduardo Fernández-Lajús ◽  
Yamila Miguel ◽  
Andrea Fortier ◽  
Romina P. Di Sisto
Keyword(s):  
The Other ◽  
Orbital Inclination ◽  
Stellar Radius ◽  
Orbital Parameters ◽  
Photometric Observations ◽  
First Results ◽  
Orbital Precession ◽  
In Transit ◽  
Observational Program

AbstractPhotometric observations of transits can be used to derive physical and orbital parameters of the system, like the planetary and stellar radius, orbital inclination and mean density of the star. Furthermore, monitoring possible periodic variations in transit timing of planets is important, since small changes can be caused by the presence of other planets or moons in the system. On the other hand, long term changes in the transit length can be due to the orbital precession of the planets. For these reasons we started an observational program dedicated to observe transits of known exoplanets with the aim of contributing to a better understanding of these planetary systems. In this work we present our first results obtained using the observational facilities in Argentina including the 2.15 telescope at CASLEO.

scholarly journals High-Resolution Observations of Variable Radio Sources

1972 ◽  
Vol 44 ◽  
pp. 228-229 ◽  
Author(s):  
A. T. Moffet ◽  
J. Gubbay ◽  
D. S. Robertson ◽  
A. J. Legg
Keyword(s):  
High Resolution ◽  
Angular Diameter ◽  
Radio Sources ◽  
Preliminary Results ◽  
Direct Observations ◽  
Test Models ◽  
Variable Radio

Preliminary results are reported of a long-term program to test models of variable radio sources by direct observations of diameter changes. Although further confirmation is needed, increase in angular diameter attributed to a centimetric component of 3C 279 found in 1966 implies relativistic expansion with α ≳ 2.In order to sort out events taking place in variable sources it is necessary to observe frequently and at many wavelengths, especially at short wavelengths.

First results after the deployment of a subsea geodetic monitoring system

2021 ◽  
Author(s):  
Pierre-François Adam ◽  
Nathalie Olivier ◽  
David Jaouen
Keyword(s):  
Velocity Profile ◽  
Monitoring System ◽  
Active Faults ◽  
Monitoring Program ◽  
Line Of Sight ◽  
Tectonic Plates ◽  
Sound Velocity Profile ◽  
The North ◽  
First Results

<p>Geodetic networks at sea are necessary to monitor active faults and the long term displacement of tectonic plates. iXblue has developed a new integrated subsea monitoring system: Canopus</p><p>The Canopus transponders are enable to regularly measure precisely the distance between the transponders that are in acoustic line of sight. The measurement are stored in a memory inside each beacon and can be collected from surface using acoustic modem. In collaboration with the IUEM, and in the framework of ERC Focus project, 8 Canopus beacons were deployed at each side of the North Alfeo Fault in Sicilia for a  4 years monitoring program. To prepare the deployment, a first experiment took place in Brest Bay in July 2019, and a second one in La Ciotat Bay in September 2020. Thanks to Delph subsea positioning software, simulations enable to confirm acoustic line of sight between beacons considering the local bathymetry, the sound velocity profile and the height of the transponders above the seabed. The final deployment took place in October 2020.  We present here the series of test and  simulations conducted before the final deployment and the first results after deployment.</p>

scholarly journals First Results of a Near IR Monitoring Program of OH/IR Stars

1993 ◽  
Vol 155 ◽  
pp. 330-330
Author(s):  
P. García-Lario ◽  
D. Engels ◽  
A. Manchado
Keyword(s):  
Point Source ◽  
Near Infrared ◽  
Monitoring Program ◽  
Near Ir ◽  
Ir Stars ◽  
First Results ◽  
Long Term Monitoring ◽  
Term Monitoring

We present the first results of a long-term monitoring program of observations in the near infrared of a selected sample of OH/IR stars included in the IRAS Point Source Catalogue. The observations have been made using the 1.5m Sanchez Magro Telescope (SMT) at Izaña (Tenerife, Spain) since the beginning of 1991 and are still in progress. They are being complemented with observations made using the 1m ESO photometric telescope (La Silla, Chile). The sample includes 30 OH/IR stars with a variety of infrared and OH maser luminosities, expansion velocities, LRS classes and position in the IRAS two-colour diagram.

Coming Together Through Falling Apart

2019 ◽  
Vol 40 (2) ◽  
pp. 151-168
Author(s):  
Heather Churchill ◽  
Jeremy M. Ridenour
Keyword(s):  
Data Analysis ◽  
Qualitative Data ◽  
Structural Changes ◽  
Systematic Approach ◽  
Qualitative Approach ◽  
Psychological Assessments ◽  
Transference And Countertransference ◽  
Testing Data ◽  
Psychoanalytically Oriented Psychotherapy

Abstract. Assessing change during long-term psychotherapy can be a challenging and uncertain task. Psychological assessments can be a valuable tool and can offer a perspective from outside the therapy dyad, independent of the powerful and distorting influences of transference and countertransference. Subtle structural changes that may not yet have manifested behaviorally can also be assessed. However, it can be difficult to find a balance between a rigorous, systematic approach to data, while also allowing for the richness of the patient’s internal world to emerge. In this article, the authors discuss a primarily qualitative approach to the data and demonstrate the ways in which this kind of approach can deepen the understanding of the more subtle or complex changes a particular patient is undergoing while in treatment, as well as provide more detail about the nature of an individual’s internal world. The authors also outline several developmental frameworks that focus on the ways a patient constructs their reality and can guide the interpretation of qualitative data. The authors then analyze testing data from a patient in long-term psychoanalytically oriented psychotherapy in order to demonstrate an approach to data analysis and to show an example of how change can unfold over long-term treatments.

Stents for the Treatment of Aortic Aneurysms

1999 ◽  
Vol 82 (S 01) ◽  
pp. 171-175 ◽  
Author(s):  
D. Ebert ◽  
M. Langer ◽  
P. Uhrmeister
Keyword(s):  
Endovascular Treatment ◽  
Endovascular Repair ◽  
Abdominal Aortic Aneurysms ◽  
Aortic Aneurysms ◽  
Imaging Modalities ◽  
Exclusion Criteria ◽  
Multicenter Studies ◽  
Abdominal Aortic ◽  
First Results

SummaryThe endovascular treatment of abdominal aortic aneurysms has generated a great deal of interest since the early 1990s, and many different devices are currently available. The procedure of endovascular repair has been evaluated in many institutions and the different devices are compared. The first results were encouraging, but complications like endoleak, dislocation or thrombosis of the graft occurred. By the available devices the stent application is only promising, if the known exclusion criteria are strictly respected. Therefore a careful preinterventional assessment of the patient by different imaging modalities is necessary. As the available results up to now are preliminary and the durability of the devices has to be controlled, multicenter studies are required to improve the devices and observe their long- term success in the exclusion of abdominal aortic aneurysms.

Becoming Rhizomatic: Researching Flowing in/between Striated and Smooth Space

2019 ◽  
Vol 13 (3) ◽  
pp. 355-376
Author(s):  
Ester A. Betrián Villas ◽  
Gloria Jové Monclus ◽  
Charly Ryan
Keyword(s):  
Data Analysis ◽  
Educational Change ◽  
Research Methodology ◽  
Deleuze And Guattari ◽  
Smooth Space

Exploring long-term educational change, we investigate our re/construction of research methodology as we moved from a positivist framework to working with ideas drawn from Deleuze and Guattari. We reveal our becoming rhizomatic in data analysis in the metamodelling of the richness flowing horizontally through our practices. We tell of our struggles to escape hierarchical thinking and relations researching between the smooth and striated. A space of interactions, conversations and writings created relations between polyphonic voices, leading us to an emergent methodology. Our struggle against hierarchies in data analysis yielded rich educational possibilities for becoming that Deleuzo-Guattarian thinking offers us.

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