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ISBI
2004
IEEE
16 years 6 months ago
Covariance of Kinetic Parameter Estimators Based on Time Activity Curve Reconstructions: Preliminary Study on 1D Dynamic Imaging
We provide approximate expressions for the covariance matrix of kinetic parameter estimators based on time activity curve (TAC) reconstructions when TACs are modeled as a linear c...
Sangtae Ahn, Jeffrey A. Fessler, Thomas E. Nichols...
ISBI
2008
IEEE
16 years 6 months ago
Real-time segmentation of 4D ultrasound by Active Geometric Functions
Four-dimensional ultrasound based on matrix phased array transducers can capture the complex 4D cardiac motion in a complete and real-time fashion. However, the large amount of in...
Qi Duan, Elsa D. Angelini, Shunichi Homma, Andrew ...
EDBT
2008
ACM
194views Database» more  EDBT 2008»
16 years 6 months ago
XCraft: boosting the performance of active XML materialization
An active XML (AXML) document contains tags representing calls to Web services. Therefore, retrieving its contents consists in materializing its data elements by invoking the embe...
Gabriela Ruberg, Marta Mattoso
AINA
2008
IEEE
16 years 19 days ago
A Proposed Scheme for Epidemic Routing with Active Curing for Opportunistic Networks
Opportunistic networking is emerging as a technique to exploit chance encounters among mobile nodes, and is distinct from previously studied behaviors found in sensor and ad hoc n...
Jonah P. Tower, Thomas D. C. Little
CNSR
2007
IEEE
174views Communications» more  CNSR 2007»
16 years 15 days ago
A New Rate-based Active Queue Management: Adaptive Virtual Queue RED
In an effort to improve performance of congested gateways, a new Active Queue Management (AQM) algorithm, Adaptive Virtual Queue Random Early Detection (AVQRED), was developed by ...
Do J. Byun, John S. Baras