scholarly journals Multiplicity Among the Young Stars

1992 ◽  
Vol 135 ◽  
pp. 41-49
Author(s):  
M. Simon
Keyword(s):  
Angular Momentum ◽  
Molecular Cloud ◽  
Young Stars ◽  
Circumstellar Disk ◽  
Multiple Systems ◽  
Star Forming ◽  
Lunar Occultation ◽  
Angular Momenta ◽  
Cloud Cores ◽  
Active Disks

AbstractOur survey for companions of the young stars now includes 45 systems in the Taurus star-forming region (SFR) and 21 in the Ophiuchus SFR. It is carried out by lunar occultation and imaging in the IR and can identify binaries in the separation range 0″.005 to 10″ in systems brighter than K=10 mag. The observed multiplicity in Taurus is ~1.6 stars/system which is comparable to that of the nearby solarlike stars but corrections for incompleteness increase the multiplicity to at least 1.8.Inner active disks are equally represented among the single and multiple systems. The multiple systems have less massive outer disks than the single systems, but there are significant exceptions. The binary UZ Tau W contains a circumstellar disk or disks of mass ~0.024 M⊙ and size ~13 AU. The quadruple GG Tau system has a remarkably extensive circumbinary disk of mass ~ 0.07M⊙. These mass estimates are comparable to the minimum values required for the proto-planetary disk of the Solar System.The specific angular momenta of the most widely spaced binaries in our sample adjoin the lowest values that can be measured for molecular cloud cores. The actual distributions probably overlap which suggests that the origin of the angular momentum of binaries is in their molecular cloud birthplaces.

Active disks

1998 ◽  
Vol 33 (11) ◽  
pp. 81-91 ◽  
Author(s):  
Anurag Acharya ◽  
Mustafa Uysal ◽  
Joel Saltz
Keyword(s):  
Active Disks

Active disks for large-scale data processing

Computer ◽  
2001 ◽  
Vol 34 (6) ◽  
pp. 68-74 ◽  
Author(s):  
E. Riedel ◽  
C. Faloutsos ◽  
G.A. Gibson ◽  
D. Nagle
Keyword(s):  
Data Processing ◽  
Large Scale ◽  
Large Scale Data ◽  
Large Scale Data Processing ◽  
Active Disks ◽  
Scale Data

Active disks

1998 ◽  
Vol 32 (5) ◽  
pp. 81-91 ◽  
Author(s):  
Anurag Acharya ◽  
Mustafa Uysal ◽  
Joel Saltz
Keyword(s):  
Active Disks

Active Disks for Data Mining

2011 ◽  
pp. 6-11
Author(s):  
Alexander Thomasian
Keyword(s):  
Data Mining ◽  
Host Computer ◽  
Database Applications ◽  
Local Memory ◽  
Disk Cache ◽  
Active Disks

Active disks allow the downloading of certain types of processing from the host computer onto disks, more specifically the disk controller, which has access to a limited amount of local memory serving as the disk cache. Data read from a disk may be sent directly to the host computer as usual or processed locally at the disk. Only filtered information is uploaded to the host computer. In this article, We am interested in downloading data mining and database applications to the disk controller.

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