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334 results on '"McLeod, Dennis"'

1. On Database Management System Architecture

Author

Hammer, Michael, McLeod, Dennis, Hammer, Michael, and McLeod, Dennis

Abstract

Despite the many advances that have been made in the field of database management in the last two decades, in many respects the paradigm of database management has not changed much since its inception. Several long-standing assumptions pervade the field and exert a great influence on the architecture of database management systems, their functions, and. the kinds of databases that they manage. This paper reconsiders some of these assumptions and suggests certain alternatives to them. In particular, it is argued that the concept of an integrated database ought to be supplanted by that of a federated database, a loose assembly of semi-independent components; the position of the database management system in the context of a total information system is reexamined, and arguments are made for extending its functional capabilities; and controlled logical redundancy in the schema is introduced as a means of improving the usability of a database and of enhancing its life-cycle performance. An underlying theme throughout is that of the importance of a semantic schema of the database, which specifies enough of the meaning of the application domain to enable enhanced functionality to be achieved. A number of characteristics of a conceptual data model (in which this scheme would be expressed) are described.

Published
2023

2. High Level Expression of Semantic Integrity Specifications in a Relational Data Base System

Author

McLeod, Dennis J. and McLeod, Dennis J.

Abstract

The "semantic integrity" of a data base is said to be violated when the data base ceases to represent a legitimate configuration of the application environment it is intended to model. In the context of the relational data model, it is possible to identify multiple levels of semantic integrity information: (1) the description of the domains of the data base, as abstract sets of atomic data values (domain definition), (2) the specification of the fundamental structure of the data (relation structure specification), (3) the definition of the abstract operations which are meaningful in terms of the application environment (structured operations), and (4) the expression of additional semantic information not contained in the structure of the relations nor in the identities of their underlying domains (relation constraints).

Published
2023

3. Dynamic Pattern Mining: An Incremental Data Clustering Approach

Author

Chung, Seokkyung, McLeod, Dennis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Spaccapietra, Stefano, editor, Bertino, Elisa, editor, Jajodia, Sushil, editor, King, Roger, editor, McLeod, Dennis, editor, Orlowska, Maria E., editor, and Strous, Leon, editor

Published
2005
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4. Model-Driven Composition of Information Systems from Shared Components and Connectors

Author

Leone, Stefania, de Spindler, Alexandre, McLeod, Dennis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Meersman, Robert, editor, Panetto, Hervé, editor, Dillon, Tharam, editor, Eder, Johann, editor, Bellahsene, Zohra, editor, Ritter, Norbert, editor, De Leenheer, Pieter, editor, and Dou, Deijing, editor

Published
2013
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5. Integrating Component-Based Web Engineering into Content Management Systems

Author

Leone, Stefania, de Spindler, Alexandre, Norrie, Moira C., McLeod, Dennis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Daniel, Florian, editor, Dolog, Peter, editor, and Li, Qing, editor

Published
2013
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6. An Approach to Glove-Based Gesture Recognition

Author

Parvini, Farid, McLeod, Dennis, Shahabi, Cyrus, Navai, Bahareh, Zali, Baharak, Ghandeharizadeh, Shahram, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, and Jacko, Julie A., editor

Published
2009
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7. The Dynamic Web Presentations with a Generality Model on the News Domain

Author

Shin, Hyun Woong, Hovy, Eduard, McLeod, Dennis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Geffert, Viliam, editor, Karhumäki, Juhani, editor, Bertoni, Alberto, editor, Preneel, Bart, editor, Návrat, Pavol, editor, and Bieliková, Mária, editor

Published
2008
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8. iSERVO: Implementing the International Solid Earth Research Virtual Observatory by Integrating Computational Grid and Geographical Information Web Services

Author

Aktas, Mehmet, Aydin, Galip, Donnellan, Andrea, Fox, Geoffrey, Granat, Robert, Grant, Lisa, Lyzenga, Greg, McLeod, Dennis, Pallickara, Shrideep, Parker, Jay, Pierce, Marlon, Rundle, John, Sayar, Ahmet, Tullis, Terry, Yin, Xiang-chu, editor, Mora, Peter, editor, Donnellan, Andrea, editor, and Matsu’ura, Mitsuhiro, editor

Published
2007
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9. QuakeSim and the Solid Earth Research Virtual Observatory

Author

Donnellan, Andrea, Rundle, John, Fox, Geoffrey, McLeod, Dennis, Grant, Lisa, Tullis, Terry, Pierce, Marlon, Parker, Jay, Lyzenga, Greg, Granat, Robert, Glasscoe, Margaret, Yin, Xiang-chu, editor, Mora, Peter, editor, Donnellan, Andrea, editor, and Matsu’ura, Mitsuhiro, editor

Published
2007
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11. Subspace Clustering of Microarray Data Based on Domain Transformation

Author

Jun, Jongeun, Chung, Seokkyung, McLeod, Dennis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Istrail, Sorin, editor, Pevzner, Pavel, editor, Waterman, Michael, editor, Dalkilic, Mehmet M., editor, Kim, Sun, editor, and Yang, Jiong, editor

Published
2006
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12. A Web-Based Novel Term Similarity Framework for Ontology Learning

Author

Chung, Seokkyung, Jun, Jongeun, McLeod, Dennis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Meersman, Robert, editor, and Tari, Zahir, editor

Published
2006
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13. A New Methodology for Information Presentations on the Web

Author

Shin, Hyun Woong, McLeod, Dennis, Pryor, Larry, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Zhou, Xiaofang, editor, Li, Jianzhong, editor, Shen, Heng Tao, editor, Kitsuregawa, Masaru, editor, and Zhang, Yanchun, editor

Published
2006
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27. PC Co-chairs’ Message

Author

Bertino, Elisa, McLeod, Dennis, Goos, Gerhard, editor, Hartmanis, Juris, editor, van Leeuwen, Jan, editor, Meersman, Robert, editor, Tari, Zahir, editor, and Schmidt, Douglas C., editor

Published
2003
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34. QuakeSim 2.0

Author

Donnellan, Andrea, Parker, Jay W, Lyzenga, Gregory A, Granat, Robert A, Norton, Charles D, Rundle, John B, Pierce, Marlon E, Fox, Geoffrey C, McLeod, Dennis, and Ludwig, Lisa Grant

Subjects
Man/System Technology And Life Support
Abstract

QuakeSim 2.0 improves understanding of earthquake processes by providing modeling tools and integrating model applications and various heterogeneous data sources within a Web services environment. QuakeSim is a multisource, synergistic, data-intensive environment for modeling the behavior of earthquake faults individually, and as part of complex interacting systems. Remotely sensed geodetic data products may be explored, compared with faults and landscape features, mined by pattern analysis applications, and integrated with models and pattern analysis applications in a rich Web-based and visualization environment. Integration of heterogeneous data products with pattern informatics tools enables efficient development of models. Federated database components and visualization tools allow rapid exploration of large datasets, while pattern informatics enables identification of subtle, but important, features in large data sets. QuakeSim is valuable for earthquake investigations and modeling in its current state, and also serves as a prototype and nucleus for broader systems under development. The framework provides access to physics-based simulation tools that model the earthquake cycle and related crustal deformation. Spaceborne GPS and Inter ferometric Synthetic Aperture (InSAR) data provide information on near-term crustal deformation, while paleoseismic geologic data provide longerterm information on earthquake fault processes. These data sources are integrated into QuakeSim's QuakeTables database system, and are accessible by users or various model applications. UAVSAR repeat pass interferometry data products are added to the QuakeTables database, and are available through a browseable map interface or Representational State Transfer (REST) interfaces. Model applications can retrieve data from Quake Tables, or from third-party GPS velocity data services; alternatively, users can manually input parameters into the models. Pattern analysis of GPS and seismicity data has proved useful for mid-term forecasting of earthquakes, and for detecting subtle changes in crustal deformation. The GPS time series analysis has also proved useful as a data-quality tool, enabling the discovery of station anomalies and data processing and distribution errors. Improved visualization tools enable more efficient data exploration and understanding. Tools provide flexibility to science users for exploring data in new ways through download links, but also facilitate standard, intuitive, and routine uses for science users and end users such as emergency responders.

Published
2012

45. Understanding Earthquake Fault Systems Using QuakeSim Analysis and Data Assimilation Tools

Author

Donnellan, Andrea, Parker, Jay, Glasscoe, Margaret, Granat, Robert, Rundle, John, McLeod, Dennis, Al-Ghanmi, Rami, and Grant, Lisa

Subjects
Geophysics
Abstract

We are using the QuakeSim environment to model interacting fault systems. One goal of QuakeSim is to prepare for the large volumes of data that spaceborne missions such as DESDynI will produce. QuakeSim has the ability to ingest distributed heterogenous data in the form of InSAR, GPS, seismicity, and fault data into various earthquake modeling applications, automating the analysis when possible. Virtual California simulates interacting faults in California. We can compare output from long time history Virtual California runs with the current state of strain and the strain history in California. In addition to spaceborne data we will begin assimilating data from UAVSAR airborne flights over the San Francisco Bay Area, the Transverse Ranges, and the Salton Trough. Results of the models are important for understanding future earthquake risk and for providing decision support following earthquakes. Improved models require this sensor web of different data sources, and a modeling environment for understanding the combined data.

Published
2008

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