SearchSkip to Search Results
- 10Zaiane, Osmar
- 5Nascimento, Mario
- 4Nascimento, Mario A.
- 3Oliveira, Stanley
- 2Antonie, Maria-Luiza
- 2El-Hajj, Mohammad
Antonie, Maria-Luiza, Zaiane, Osmar
Technical report TR04-07. Typical association rules consider only items enumerated in transactions. Such rules are referred to as positive association rules. Negative association rules also consider the same items, but in addition consider negated items (i.e. absent from transactions). Negative...
Modeling and Querying Multimedia Data
Technical report TR98-05. Amidst the dramatic developments of computer technology in the last decades, we have seen a growing interest in supporting multimedia data. Compared with traditional data, the most noticeable features of multimedia data are their spatiality (the spatial layout of...
Nikolaidis, Ioanis, Nascimento, Mario A., Malhotra, Baljeet
Technical report TR09-01. Finding the top-k values is an important type of aggregation query in wireless sensor networks. Previous proposals relied on a given underlying logical tree topology for data aggregation/forwarding, but did not pay due attention to the role of such topology. In this...
On the Trade-Off Between User-Location Privacy and Queried-Location Privacy in Wireless Sensor NetworksDownload
Harms, Janelle, Vogt, Ryan, Nascimento, Mario
Technical report TR09-07. By eavesdropping on a user's query in a sensor network, an adversary can deduce both the user's location and his/her area of interest. In many domains it is desirable to guarantee privacy of both places. Relying on the principle of k-anonymity, we propose an effective...
Alencar, Romulo, Nascimento, Mario, Brayner, Angelo
Technical report TR09-05. It is a well known fact that minimizing energy consumption in Wireless Sensor Networks (WSNs) is crucial for its usability; and minimizing the flow of data is one way to achieve that. Most WSN models assume the existence of a base station where query results could in...
Technical report TR90-33. Object-oriented database systems have been proposed as an effective solution for providing the data management facilities of complex applications. Proving the veracity of this claim and the investigation of related issues such as query processing have been hampered by...
Lake, Robert, Schaeffer, Jonathan, Lu, Paul
Technical report TR93-13. Chess endgame databases, while of important theoretical interest, have yet to make a significant impact in tournament chess. In the game of checkers, however, endgame databases have played a pivotal role in the success of our World Championship challenger program...
Temporality in Object Database Management Systems
Technical report TR98-04. Conventional databases represent the state of an enterprise at one particular point in time. That is, they contain only current data. As a database changes, out-of-date information, representing past states of the enterprise, is discarded. However, temporal support is a...
Goebel, Randy, Chen, Jiyang, Yu, Philip S., Zaiane, Osmar R.
Technical report TR09-02. The significant increase in open access digital information has created incredible opportunities for modern database research, especially in exploiting significant computational resources to determine complex relationships within those data. In this paper, we consider...