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» On the direct limit of a direct system of multialgebras
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IUI
2003
ACM
14 years 1 months ago
Power tools and composite tools: integrating automation with direct manipulation
This paper describes a drawing system that incorporates two novel interaction techniques based on analogies to physical tools. Power tools add limited autonomy in the form of rota...
John M. Daughtry, Robert St. Amant
USENIX
2008
13 years 10 months ago
Protection Strategies for Direct Access to Virtualized I/O Devices
Commodity virtual machine monitors forbid direct access to I/O devices by untrusted guest operating systems in order to provide protection and sharing. However, both I/O memory ma...
Paul Willmann, Scott Rixner, Alan L. Cox
ICC
2009
IEEE
101views Communications» more  ICC 2009»
13 years 5 months ago
Using Limited Feedback in Power Allocation Design for a Two-Hop Relay OFDM System
In this paper, we study power allocation (PA) in a single-relay OFDM system with limited feedback. We propose a PA scheme that uses a codebook of quantized PA vectors designed offl...
Mahdi Hajiaghayi, Min Dong, Ben Liang
IPPS
2003
IEEE
14 years 1 months ago
Parallel Direct Solution of Linear Equations on FPGA-Based Machines
The efficient solution of large systems of linear equations represented by sparse matrices appears in many tasks. LU factorization followed by backward and forward substitutions i...
Xiaofang Wang, Sotirios G. Ziavras
TWC
2010
13 years 2 months ago
Rateless coding for MIMO fading channels: performance limits and code construction
In this letter the performance limits and design principles of rateless codes over fading channels are studied. The diversity-multiplexing tradeoff (DMT) is used to analyze the sys...
Yijia Fan, Lifeng Lai, Elza Erkip, H. Vincent Poor