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1
Wireless sensor networks for soil science
Andreas Terzis,
Razvan Musaloiu-E.,
Joshua Cogan,
Katalin Szlavecz,
Alexander Szalay,
Jim Gray,
Stuart Ozer,
Chieh-Jan Mike Liang,
Jayant Gupchup,
Randal Burns
February 2010
International Journal of Sensor Networks: Volume 7 Issue 1/2, February 2010
Publisher: Inderscience Publishers
Wireless sensor networks can revolutionise soil ecology by providing measurements at temporal and spatial granularities previously impossible. This paper presents our first steps towards fulfilling that goal by developing and deploying two experimental soil monitoring networks at urban forests in Baltimore, MD. The nodes of these networks periodically measure soil ...
Keywords:
environmental monitoring, soil science, wireless networks, urban forests, wireless sensor networks, web services, WSNs, soil moisture, soil monitoring, soil temperature
2
Distributed Computing Economics
Jim Gray
May 2008
Queue - Object-Relational Mapping: Volume 6 Issue 3, May/June 2008
Publisher: ACM
Bibliometrics:
Citation Count: 19
Downloads (6 Weeks): 403, Downloads (12 Months): 2,623, Downloads (Overall): 48,781
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Computing economics are changing. Today there is rough price parity between: (1) one database access; (2) 10 bytes of network traffic; (3) 100,000 instructions; (4) 10 bytes of disk storage; and (5) a megabyte of disk bandwidth. This has implications for how one structures Internet-scale distributed computing: one puts computing ...
3
The Catalog Archive Server Database Management System
Ani R. Thakar,
Alex Szalay,
George Fekete,
Jim Gray
January 2008
Computing in Science and Engineering: Volume 10 Issue 1, January 2008
Publisher: IEEE Educational Activities Department
The multiterabyte Sloan Digital Sky Survey’s (SDSS’s) catalog data is stored in a commercial relational database management system with SQL query access and a built-in query optimizer. The SDSS Catalog Archive Server adds advanced data mining features to the DBMS to provide fast online access to the data.
Keywords:
large-scale databases, Sloan Digital Sky Survey Science Archive, database management systems, SDSS, Sloan Digital Sky Survey Science Archive, SDSS, astronomy, large-scale databases, database management systems, astronomy
4
The sqlLoader Data-Loading Pipeline
Alex Szalay,
Ani R. Thakar,
Jim Gray
January 2008
Computing in Science and Engineering: Volume 10 Issue 1, January 2008
Publisher: IEEE Educational Activities Department
Using a database management system (DBMS) is essential to ensure the data integrity and reliability of large, multidimensional data sets. However, loading multiterabyte data into a DBMS is a time-consuming and error-prone task that the authors have tried to automate by developing the sqlLoader pipeline—a distributed workflow system for data ...
Keywords:
SDSS, Sloan Digital Sky Survey Science Archive, SDSS, astronomy, large-scale databases, database management systems, astronomy, large-scale databases, Sloan Digital Sky Survey Science Archive, database management systems
5
Data Management in the Worldwide Sensor Web
April 2007
IEEE Pervasive Computing: Volume 6 Issue 2, April 2007
Publisher: IEEE Educational Activities Department
Advances in hardware and miniaturization technologies have led to a rapid increase in the number of large-scale sensor networkdeployments around the world, bringing us closer to the vision of a worldwide sensor web. Exploiting the sensor web to its fullpotential, however, raises several hard data management challenges. Addressing these challenges ...
Keywords:
data modeling, sensor networks, sensor networks, data uncertainty, distributed systems, interoperability, data modeling, data streams, distributed systems, data streams, data uncertainty, interoperability
6
A memory model for scientific algorithms on graphics processors
November 2006
SC '06: Proceedings of the 2006 ACM/IEEE conference on Supercomputing
Publisher: ACM
Bibliometrics:
Citation Count: 53
Downloads (6 Weeks): 5, Downloads (12 Months): 15, Downloads (Overall): 825
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We present a memory model to analyze and improve the performance of scientific algorithms on graphics processing units (GPUs). Our memory model is based on texturing hardware, which uses a 2D block-based array representation to perform the underlying computations. We incorporate many characteristics of GPU architectures including smaller cache sizes, ...
Keywords:
memory model, scientific algorithms, graphics processors
7
Data analysis tools for sensor-based science
October 2006
SenSys '06: Proceedings of the 4th international conference on Embedded networked sensor systems
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 2, Downloads (12 Months): 6, Downloads (Overall): 320
Full text available:
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Science is increasingly driven by data collected automatically from arrays of inexpensive sensors. The collected data volumes require a different approach from the scientists' current Excel spreadsheet storage and analysis model. Spreadsheets work well for small data sets; but scientists want high level summaries of their data for various statistical ...
Keywords:
data cubes, sensor networks
8
Designing and Building TerraService
Tom Barclay,
Jim Gray,
Steve Ekblad,
Eric Strand,
Jeffrey Richter
September 2006
IEEE Internet Computing: Volume 10 Issue 5, September 2006
Publisher: IEEE Educational Activities Department
A few simple rules guide the design of Web services such as TerraService, a geospatial serviceadded to Microsoft's popular TerraServer database. By sticking to standards-based tools, the authorswere able to implement the Web service with no major structural changes to the database. Because itconforms to the "1-to-10 Kbytes in one ...
Keywords:
TerraServer, TerraService, Web services, GIS, geographic information systems, Web services, GIS, geographic information systems,TerraService, TerraServer
9
GPUTeraSort: high performance graphics co-processor sorting for large database management
June 2006
SIGMOD '06: Proceedings of the 2006 ACM SIGMOD international conference on Management of data
Publisher: ACM
Bibliometrics:
Citation Count: 121
Downloads (6 Weeks): 12, Downloads (12 Months): 74, Downloads (Overall): 1,529
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We present a novel external sorting algorithm using graphics processors (GPUs) on large databases composed of billions of records and wide keys. Our algorithm uses the data parallelism within a GPU along with task parallelism by scheduling some of the memory-intensive and compute-intensive threads on the GPU. Our new sorting ...
10
Consensus on transaction commit
March 2006
ACM Transactions on Database Systems (TODS): Volume 31 Issue 1, March 2006
Publisher: ACM
Bibliometrics:
Citation Count: 44
Downloads (6 Weeks): 23, Downloads (12 Months): 132, Downloads (Overall): 2,074
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The distributed transaction commit problem requires reaching agreement on whether a transaction is committed or aborted. The classic Two-Phase Commit protocol blocks if the coordinator fails. Fault-tolerant consensus algorithms also reach agreement, but do not block whenever any majority of the processes are working. The Paxos Commit algorithm runs a ...
Keywords:
Consensus, Paxos, two-phase commit
11
Petascale Computational Systems
Gordon Bell,
Jim Gray,
Alex Szalay
January 2006
Computer: Volume 39 Issue 1, January 2006
Publisher: IEEE Computer Society Press
A balanced cyberinfrastructure is necessary to meet growing data-intensive scientific needs.
Keywords:
cyberinfrastructure, petascale computation, data-centric computation, amdahl's laws, petascale computation, cyberinfrastructure, data-centric computation, amdahl's laws
12
Scientific data management in the coming decade
Jim Gray,
David T. Liu,
Maria Nieto-Santisteban,
Alex Szalay,
David J. DeWitt,
Gerd Heber
December 2005
ACM SIGMOD Record: Volume 34 Issue 4, December 2005
Publisher: ACM
Bibliometrics:
Citation Count: 90
Downloads (6 Weeks): 24, Downloads (12 Months): 146, Downloads (Overall): 4,387
Full text available:
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Scientific instruments and computer simulations are creating vast data stores that require new scientific methods to analyze and organize the data. Data volumes are approximately doubling each year. Since these new instruments have extraordinary precision, the data quality is also rapidly improving. Analyzing this data to find the subtle effects ...
13
The Lowell database research self-assessment
Serge Abiteboul,
Rakesh Agrawal,
Phil Bernstein,
Mike Carey,
Stefano Ceri,
Bruce Croft,
David DeWitt,
Mike Franklin,
Hector Garcia Molina,
Dieter Gawlick,
Jim Gray,
Laura Haas,
Alon Halevy,
Joe Hellerstein,
Yannis Ioannidis,
Martin Kersten,
Michael Pazzani,
Mike Lesk,
David Maier,
Jeff Naughton,
Hans Schek,
Timos Sellis,
Avi Silberschatz,
Mike Stonebraker,
Rick Snodgrass,
Jeff Ullman,
Gerhard Weikum,
Jennifer Widom,
Stan Zdonik
May 2005
Communications of the ACM - Adaptive complex enterprises: Volume 48 Issue 5, May 2005
Publisher: ACM
Bibliometrics:
Citation Count: 49
Downloads (6 Weeks): 4, Downloads (12 Months): 49, Downloads (Overall): 3,126
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Database needs are changing, driven by the Internet and increasing amounts of scientific and sensor data. In this article, the authors propose research into several important new directions for database management systems.
14
A Call to Arms
Jim Gray,
Mark Compton
April 2005
Queue - Databases: Volume 3 Issue 3, April 2005
Publisher: ACM
Bibliometrics:
Citation Count: 3
Downloads (6 Weeks): 560, Downloads (12 Months): 3,424, Downloads (Overall): 41,884
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Long anticipated, the arrival of radically restructured database architectures is now finally at hand.
15
A Conversation with Tim Bray
Jim Gray
February 2005
Queue - Quality Assurance: Volume 3 Issue 1, February 2005
Publisher: ACM
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 252, Downloads (12 Months): 2,968, Downloads (Overall): 36,288
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Tim Bray's Waterloo was no crushing defeat, but rather the beginning of his success as one of the conquerors of search engine technology and XML. In 1986, after working in software at DEC and GTE, he took a job at the University of Waterloo in Ontario, Canada, where he managed ...
16
Where the Rubber Meets the Sky: The Semantic Gap between Data Producers and Data Consumers
J. Gray
June 2004
SSDBM '04: Proceedings of the 16th International Conference on Scientific and Statistical Database Management
Publisher: IEEE Computer Society
17
The next database revolution
Jim Gray
June 2004
SIGMOD '04: Proceedings of the 2004 ACM SIGMOD international conference on Management of data
Publisher: ACM
Bibliometrics:
Citation Count: 13
Downloads (6 Weeks): 4, Downloads (12 Months): 28, Downloads (Overall): 1,591
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Database system architectures are undergoing revolutionary changes. Most importantly, algorithms and data are being unified by integrating programming languages with the database system. This gives an extensible object-relational system where non-procedural relational operators manipulate object sets. Coupled with this, each DBMS is now a web service. This has huge implications ...
18
Migrating a Multiterabyte Archive from Object to Relational Databases
Ani Thakar,
Alex Szalay,
Peter Kunszt,
Jim Gray
September 2003
Computing in Science and Engineering: Volume 5 Issue 5, September 2003
Publisher: IEEE Educational Activities Department
A commercial, object-oriented database engine with custom tools for data-mining the multiterabyte Sloan Digital Sky Survey archive did not meet its performance objectives. We describe the problems, technical issues, and process of migrating this large data set project to relational database technology.
Keywords:
database, astronomy, terabyte, archive, migrating
19
On-line science: the world-wide telescope as a prototype for the new computational science
Jim Gray
August 2003
KDD '03: Proceedings of the ninth ACM SIGKDD international conference on Knowledge discovery and data mining
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 1, Downloads (12 Months): 11, Downloads (Overall): 189
Full text available:
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20
The Lowell report
June 2003
SIGMOD '03: Proceedings of the 2003 ACM SIGMOD international conference on Management of data
Publisher: ACM
Bibliometrics:
Citation Count: 2
Downloads (6 Weeks): 1, Downloads (12 Months): 9, Downloads (Overall): 520
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