Filters








38 Hits in 7.3 sec

File organizations and access methods for CLV disks

S. Christodoulakis, D. A. Ford
1989 Proceedings of the 12th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '89  
In this paper, we examine the issues related to the implementation and performance of several different file organizations on CLV format optical discs such as CD ROM and WORM.  ...  The paper concludes by outlining recent results and future directions on buffered implementations of access methods for WORM discs, as well as advantages of signature based access methods for text retrieval  ...  In section 3, we examine the implementation and performance of the hashing file access method for the CLV format.  ... 
doi:10.1145/75334.75350 dblp:conf/sigir/ChristodoulakisF89 fatcat:4k2z4cxdavfyplbleqg6qmse4i

Track following Control with DFT Estimator for Eccentric Error Compensation of Optical Disk Driver

J. Jeonghun Kim, K. Kyusam Lim, S. Kim
2007 IEEE transactions on consumer electronics  
This paper proposes a dynamic eccentric error compensation architecture for the tracking follow controller of optical disk drivers.  ...  For enhancing the tracking performance in an optical disk drive servo system, it is essential to attenuate periodic disturbances which are caused by revolutions of the disk.  ...  ACKNOWLEDGMENT The authors would like to thank Xiao Lin for her contribution to develop the algorithm. They also thank the numerous reviewers for their suggestions.  ... 
doi:10.1109/tce.2007.381717 fatcat:fdn7kzs4ync2hliujkh36fwsqa

Disk system architectures for high performance computing

R.H. Katz, G.A. Gibson, D.A. Patterson
1989 Proceedings of the IEEE  
A number of hardware and software approaches such as parallel read-out disks, expanded storage (for example, solid-state disks), and disk striping, have been used to increase //O bandwidth and thus narrow  ...  In addition, new developments driven by advances in smalldiameter (5.25-in and 3.5-in) disk drives, promise very high 110 bandwidth if large numbers of devices can be organized into arrays of disks.  ...  ACKNOWLEDCMEN~ We wish to thank our colleagiies o n the RAID project for theircontributionstothework ri:ported in this paper.These  ... 
doi:10.1109/5.48827 fatcat:dkl7mekauve7nblajgnhb53opm

Design issues and caching strategies for CD-ROM-based multimedia storage

Vijnan Shastri, V. Rajaraman, H. S. Jamadagni, P. Venkat-Rangan, Srihari Sampath-Kumar, Martin Freeman, Paul Jardetzky, Harrick M. Vin
1996 Multimedia Computing and Networking 1996  
CD-ROMs have proliferated as a distribution media for desktop machines for a large variety of multimedia applications (targeted for a single-user environment) like encyclopedias, magazines and games.  ...  Motivation CD-ROMs have proliferated as distribution media for desktop multimedia PCs for a large variety of products like multimedia encyclopedias, multimedia magazines and multimedia games .  ...  GSS organizes the requests in groups and employs SCAN within the groups.  ... 
doi:10.1117/12.235874 fatcat:sd3kirxxzzdnzklnw7qzp6d7di

THECHANDRALOCAL VOLUME SURVEY: THE X-RAY POINT-SOURCE CATALOG OF NGC 300

B. Binder, B. F. Williams, M. Eracleous, T. J. Gaetz, P. P. Plucinsky, E. D. Skillman, J. J. Dalcanton, S. F. Anderson, D. R. Weisz, A. K. H. Kong
2012 Astrophysical Journal  
Deep, multi-color imaging from the Hubble Space Telescope, covering ~32% of our Chandra field, was used to search for optical counterparts to the X-ray sources, and we have developed a new source classification  ...  We derive an X-ray scale length of 1.7+/-0.2 kpc and a recent star formation rate of 0.12 Msun yr^-1, in excellent agreement with optical observations.  ...  The routine reads in an input source file containing all X-ray and optical information (if available), and returns a preliminary source classification.  ... 
doi:10.1088/0004-637x/758/1/15 fatcat:lririedn4zgr7ckglo5yq3eany

Development of a Multimedia Learning Package for Map Projections

William Cartwright, Rod Deakin, Carmel McNaught
2000 Cartography  
Optical disks have varying rotation speed (Constant Linear Velocity, CLV) and hence, the storage density is the same on the whole disk.  ...  Later, disk scheduling algorithms for file retrieval are discussed. File Structure We commonly distinguish between two methods of file organization.  ... 
doi:10.1080/00690805.2000.9714110 fatcat:zbct75yndrgxvgz3566mx3zgvy

The quantification of the visual field in computer-assisted threshold perimetry [chapter]

J. M. Wild, J. M. Wood, M. K. Hussey, S. J. Crews
1987 Seventh International Visual Field Symposium, Amsterdam, September 1986  
Fankhauser for his support and Dr A.  ...  Acknowledgements The authors are indebted to P Schneider and CH. Langenegger for help with the figures and C. Rutishauser for her assistance with the poster. They would also like to thank Prof. F.  ...  The data base The data base is a direct access file built into the VAX environment as an indexed file which can search and retrieve patient's information and data faster than a sequential file.  ... 
doi:10.1007/978-94-009-3325-5_26 fatcat:e6ffftom5ngchh65vmckbi36p4

Developing and Publishing High-Quality Electronic Documents on CD-ROM [article]

Steve Cunningham
1997 Eurographics State of the Art Reports  
Persons within the technical community are among the most likely to have access to the tools needed to read and use electronic publications, and are among those most likely to be comfortable with this  ...  and for presenting the material to the audience, and the media used for delivering the The common theme that runs through all this integrated content to the audience. material is that the editorial content  ...  The disc thus serves as both a primary resource and as a way to organize the access to updated primary resources as well as secondary resources for the book.  ... 
doi:10.2312/egt.19971007 fatcat:m36r4jkb75hetgpx3q5ggv3rva

Detection of Na in WASP-21b's lower and upper atmosphere [article]

G. Chen, N. Casasayas-Barris, E. Palle, L. Welbanks, N. Madhusudhan, R. Luque, F. Murgas
2020 arXiv   pre-print
Optical transmission spectroscopy provides crucial constraints on the reference pressure levels and scattering properties for hot Jupiter atmospheres.  ...  For certain planets, where alkali atoms are detected in the atmosphere, their line profiles could serve as a good probe to link upper and lower atmospheric layers.  ...  This work has made use of Matplotlib (Hunter 2007 ) and the VizieR catalog access tool, CDS, Strasbourg, France (Ochsenbein et al. 2000) .  ... 
arXiv:2007.13429v1 fatcat:6xjwolu5fzb5vorjhctzl47l2y

Intra- and interobserver reproducibility in the evaluation of the optic disc by HRT

S. Miglior, E. Albe, M. Guareschi, L. Rossetti, N. Orzalesi
2002 Acta Ophthalmologica Scandinavica  
To both of them go our sincere thanks for their welcome and collaboration.  ...  Let us think of it this way, however, that a third good reason for joining our forces may lie in the desire not only to exchange ideas and knowledge, but to meet friends who, for many reasons of life,  ...  Acknowledgements This work has been supported by the Piedmont Region, MURST (40% 1998), the CRT Foundation and the San Paolo Company grants to AV. the course of some ocular disease linked to a vascular  ... 
doi:10.1034/j.1600-0420.80.s236.46.x fatcat:ozut2svbt5bbtoxtqdofml4dca

Prague opening remarks

B Boles Carenini
2002 Acta Ophthalmologica Scandinavica  
To both of them go our sincere thanks for their welcome and collaboration.  ...  Let us think of it this way, however, that a third good reason for joining our forces may lie in the desire not only to exchange ideas and knowledge, but to meet friends who, for many reasons of life,  ...  Acknowledgements This work has been supported by the Piedmont Region, MURST (40% 1998), the CRT Foundation and the San Paolo Company grants to AV. the course of some ocular disease linked to a vascular  ... 
doi:10.1034/j.1600-0420.80.s236.48.x fatcat:cf6lueduzbhwzjd4tj3rn544qy

Detection of Na in WASP-21b's lower and upper atmosphere

G. Chen, N. Casasayas-Barris, E. Pallé, L. Welbanks, N. Madhusudhan, R. Luque, F. Murgas
2020 Astronomy and Astrophysics  
Optical transmission spectroscopy provides crucial constraints on the reference pressure levels and scattering properties for the atmospheres of hot Jupiters.  ...  The planet WASP-21b is a Saturn-mass hot Jupiter orbiting a thick-disk star, with a low density and an equilibrium temperature of 1333 K, which makes it a good target for transmission spectroscopy.  ...  (Hunter 2007 ) and the VizieR catalog access tool, CDS, Strasbourg, France (Ochsenbein et al. 2000) . The authors thank the anonymous referee for their constructive comments on the manuscript.  ... 
doi:10.1051/0004-6361/202038661 fatcat:inbijrrmcbcpbco3r7sjn4x7je

Network Organization and Governance [chapter]

2018 CRC Handbook of Modern Telecommunications  
Numerous methods are available for making dynamic spectrum access efficient with respect to time, power requirements, and cost.  ...  Numerous methods are available for making dynamic spectrum access efficient with respect to time, power requirements, and cost.  ...  in terms of Customer Lifetime Value (CLV).  ... 
doi:10.1201/9781420078084-9 fatcat:eyixyd27nzbmthwoqybadgqz2e

Optimization of the CD-ROM system towards higher data throughputs [article]

SG Sorin Stan, PPJ Paul Van Den Bosch, OH Okko Bosgra, AAH Ad Damen
1999
Quasi-CLV turntable motor control The quasi-CLV method represents a technique for controlling the turntable motor in a disk-based storage device and it has been described for the first time in [144]  ...  A general method for variablespeed playback had already been disclosed in a patent description [77] before being implemented in any optical disk drive.  ...  When both data throughput and access time performance need to be optimized in a CD-or DVD-ROM system, neither CLV nor CAV represents an optima!  ... 
doi:10.6100/ir522301 fatcat:6znvetqm25f2zlgdxllf5p3yv4

Optical storage technology : applications and implications for archives

Judith Susanna Kovacs
1994
Thus, it is important for archivists to understand not only the technology, but the implications of its use on traditional archival methods and practices.  ...  The use ofthis form of mass electronic storage has the potential to affect the way archives conserve, preserve, store and make accessible the records in their custody.  ...  It is accessed by 4 optical players and was available for The oldest and most common method of WORM recording is ablative pit technology.  ... 
doi:10.14288/1.0087550 fatcat:zwsy74sxjzhurohq6ojijhe3v4
« Previous Showing results 1 — 15 out of 38 results