scholarly journals Wind Ionization Structure of the Short-Period Eclipsing LMC Wolf-Rayet Binary BAT99-129: Preliminary Results

2006 ◽  
Vol 304 (1-4) ◽  
pp. 85-88
Author(s):  
C. Foellmi ◽  
A. F. J. Moffat ◽  
S. V. Marchenko
Keyword(s):  
Preliminary Results ◽  
Ionization Structure ◽  
Short Period

Radio wave Doppler studies of the Antarctic ionosphere

1977 ◽  
Vol 279 (963) ◽  
pp. 239-246 ◽  
Keyword(s):  
Energy Balance ◽  
Radio Wave ◽  
Antarctic Peninsula ◽  
Current Knowledge ◽  
Doppler Studies ◽  
Preliminary Results ◽  
Short Period ◽  
The Antarctic

The occurence of propagating wave-like disturbances in the atmosphere at ionospheric heights is well documented, but their causes and role in the energy balance of the atmosphere is poorly understood. This paper describes an experiment deployed in the Antarctic Peninsula region to investigate the morphology of the various classes of disturbance, with particular emphasis on the identification of their sources. Current knowledge of the phenomena is briefly reviewed and the reasons why observations in the peninsula region may be especially valuable are discussed. Some preliminary results from the first 3 months of operation are presented; these indicate the presence of waves with periods ranging from less than 1 min to more than 90 min. The short period waves (1-5 min) are unusually common in these data.

A Slug Damper for Compact Separators

2002 ◽  
Author(s):  
Gene E. Kouba
Keyword(s):  
Flow Rate ◽  
Liquid Flow ◽  
Slug Flow ◽  
Dynamic Range ◽  
Liquid Flow Rate ◽  
Careful Consideration ◽  
The Body ◽  
Preliminary Results ◽  
Flow Fluctuations ◽  
Short Period

A common concern with the reduced capacity of compact gas/liquid separators, such as the GLCC©, is that flow fluctuations are passed through the separator with little dampening. Rate sensitive devices, e.g., meters, hydrocyclones, etc., located downstream of the compact separator often have a desired turn-down of less than 10 to 1. However, in slug flow, the instantaneous liquid flow rate in the body of a slug can easily exceed 10 times the average liquid flow rate, with a dynamic range closer to 100 to 1. Consequently, use of the GLCC requires careful consideration of the downstream systems and their susceptibility to flow fluctuations. The slug damper was developed to reduce the magnitude of short period flow fluctuations by providing an inexpensive way of increasing liquid retaining capacity of the inlet piping to the GLCC. These preliminary results show that the slug damper system does indeed dramatically reduce exiting flow rate fluctuations from incoming slug flow. Furthermore, the slug damper performed in a predictable manner with no observed instabilities or unusual operation modes.

scholarly journals HD 150136: towards one of the most massive systems?

2010 ◽  
Vol 6 (S272) ◽  
pp. 521-522
Author(s):  
Laurent Mahy ◽  
Eric Gosset ◽  
Hugues Sana ◽  
Gregor Rauw ◽  
Thomas Fauchez ◽  
...  
Keyword(s):  
Physical Parameters ◽  
Intensive Monitoring ◽  
Preliminary Results ◽  
Short Period ◽  
Period System ◽  
Orbital Solution ◽  
Three Components

AbstractWe present the preliminary results of an intensive monitoring devoted to HD 150136. Already quoted as an O3+O6 binary, we detected a third O-type component physically linked to the system, making it one of the nearest (1.3 kpc) most massive systems known until now (~134M⊙). To determine the physical parameters of this system, we applied a disentangling program to study individually the three components. It allows us to constrain their spectral types and to derive a new orbital solution for the short-period system.

scholarly journals Rotaphone-CY: The Newest Rotaphone Model Design and Preliminary Results from Performance Tests with Active Seismic Sources

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 562
Author(s):  
Johana Brokešová ◽  
Jiří Málek ◽  
Jiří Vackář ◽  
Felix Bernauer ◽  
Joachim Wassermann ◽  
...  
Keyword(s):  
Performance Tests ◽  
Model Design ◽  
Small Aperture ◽  
Preliminary Results ◽  
Rigid Frame ◽  
Short Period ◽  
Reliable Instrument ◽  
Mutual Comparison ◽  
Mechanical Sensor ◽  
Field Deployment

Rotaphone-CY is a six-component short-period seismograph that is capable of the co-located recording of three translational (ground velocity) components along three orthogonal axes and three rotational (rotation rate) components around the three axes in one device. It is a mechanical sensor system utilizing records from elemental sensors (geophones) arranged in parallel pairs to derive differential motions in the pairs. The pairs are attached to a rigid frame that is anchored to the ground. The model design, the latest one among various Rotaphone designs based on the same principle and presented elsewhere, is briefly introduced. The upgrades of the new model are a 32-bit A/D converter, a more precise placing of the geophones to parallel pairs and a better housing, which protects the instrument from external electromagnetic noise. The instrument is still in a developmental stage. It was tested in a field experiment that took place at the Geophysical Observatory in Fürstenfeldbruck (Germany) in November 2019. Four Rotaphones-CY underwent the huddle-testing phase of the experiment as well as the field-deployment phase, in which the instruments were installed in a small-aperture seismic array of a triangular shape. The preliminary results from this active-source experiment are shown. Rotaphone-CY data are verified, in part, by various approaches: mutual comparison of records from four independent Rotaphone-CY instruments, waveform matching according to rotation-to-translation relations, and comparison to array-derived rotations when applicable. The preliminary results are very promising and they suggest the good functionality of the Rotaphone-CY design. It has been proved that the present Rotaphone-CY model is a reliable instrument for measuring short-period seismic rotations of the amplitudes as small as 10−7 rad/s.

scholarly journals The Photometric Study of Neglected Short-Period Eclipsing Binary BS Vulpeculae

2011 ◽  
Vol 7 (S282) ◽  
pp. 83-84
Author(s):  
Miloslav Zejda ◽  
Zdeněk Mikulášek ◽  
Liying Zhu ◽  
Shengbang Qian ◽  
Jiří Liška
Keyword(s):  
Light Curves ◽  
Physical Parameters ◽  
Photometric Study ◽  
Eclipsing Binary ◽  
Preliminary Results ◽  
Short Period

AbstractThe preliminary results of a study of a neglected, relatively bright, short-periodic (P=0.48 d), near contact eclipsing binary BS Vulpeculae is given. We present our new complete (BVRI) light curves, and physical parameters of the system based on them, derived by the 2003 version of the Wilson–Van Hamme code.

scholarly journals A Search for Variables in the Central Regions of Southern Globular Clusters

1996 ◽  
Vol 174 ◽  
pp. 337-338
Author(s):  
J. W. Menzies
Keyword(s):  
Globular Clusters ◽  
Ccd Photometry ◽  
Preliminary Results ◽  
Blue Stragglers ◽  
Short Period ◽  
Central Regions

Preliminary results are presented for 3 southern globular clusters that have been searched via CCD photometry for new short-period variables that might be associated with blue stragglers. The clusters considered here are NGC6121, NGC3201 and NGC6809.

scholarly journals PRELIMINARY RESULTS FOR SHORT-PERIOD VARIABILITY SURVEY (SPVS) : NEW FIELD VARIABLE STARS

2007 ◽  
Vol 22 (4) ◽  
pp. 141-149 ◽  
Author(s):  
Young-Beom Jeon ◽  
Ki-Hyung Nam ◽  
Yoon-Ho Park ◽  
Kyung-Hoon Lee
Keyword(s):  
Variable Stars ◽  
Field Variable ◽  
Preliminary Results ◽  
Period Variability ◽  
Short Period

scholarly journals Coronal Heating by MHD Waves: Results from the SECIS Instrument during the 1999 Eclipse

2001 ◽  
Vol 203 ◽  
pp. 467-470
Author(s):  
K. J. H. Phillips ◽  
P. T. Gallagher ◽  
D. R. Williams ◽  
F. P. Keenan ◽  
P. Rudawy ◽  
...  
Keyword(s):  
Visible Light ◽  
Solar Eclipse ◽  
Light Emission ◽  
Imaging System ◽  
Mhd Waves ◽  
Ccd Cameras ◽  
Preliminary Results ◽  
Short Period ◽  
A Site ◽  
Visible Light Emission

We report on results from the Solar Eclipse Coronal Imaging System (SECIS), an instrument using fast CCD cameras designed to search for short-period modulations in visible-light emission from the corona during an eclipse or with a coronagraph. The instrument was successfully used during the total eclipse of 1999 August 11 from a site in Bulgaria. This paper summarizes both the instrument and preliminary results.

scholarly journals Restoration of walking in patients with incomplete spinal cord injuries by use of surface electrical stimulation—preliminary results

1985 ◽  
Vol 9 (2) ◽  
pp. 109-111 ◽  
Author(s):  
T. Bajd ◽  
B. J. Andrews ◽  
A. Kralj ◽  
J. Katakis
Keyword(s):  
Spinal Cord ◽  
Electrical Stimulation ◽  
Functional Electrical Stimulation ◽  
Spinal Cord Injuries ◽  
Voluntary Control ◽  
Upper Limbs ◽  
Preliminary Results ◽  
Short Period ◽  
Sufficient Strength

A group of patients who are good candidates for the application of Functional Electrical Stimulation (FES) to restore reciprocal walking is described. They have incomplete lesions of the spinal cord. Because of the degree of preserved voluntary control, proprioception and sensation some of these patients can achieve crutch assisted walking by means of multichannel electrical stimulation: In a number of cases the patient has sufficient strength and voluntary control in the upper limbs and at least one leg to provide safe standing for short periods in forearm crutches. For these patients a two channel stimulator controlled by a handswitch was applied to achieve safe and practical crutch assisted walking in a relatively short period of time.

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