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Now showing items 21-30 of 43
Mitigating spam using network-level features
(Georgia Institute of Technology, 2011-08-04)
Spam is an increasing menace in email: 90% of email is spam, and over 90% of spam is sent by botnets---networks of compromised computers under the control of miscreants. In this dissertation, we introduce email spam ...
Scaling solutions to Markov Decision Problems
(Georgia Institute of Technology, 2011-11-14)
The Markov Decision Problem (MDP) is a widely applied mathematical model useful for describing a wide array of real world decision problems ranging from navigation to scheduling to robotics. Existing methods for solving ...
Stochastic m-estimators: controlling accuracy-cost tradeoffs in machine learning
(Georgia Institute of Technology, 2011-11-15)
m-Estimation represents a broad class of estimators, including least-squares and maximum likelihood, and is a widely used tool for statistical inference. Its successful application however, often requires negotiating ...
Designing security policies and frameworks for web applications
(Georgia Institute of Technology, 2011-05-24)
The new developments behind Web 2.0 have increased the complexity of web systems making the task of securing these systems a challenging problem. As a result, end-to-end security for web access has been hindered by the ...
New support vector machine formulations and algorithms with application to biomedical data analysis
(Georgia Institute of Technology, 2011-06-13)
The Support Vector Machine (SVM) classifier seeks to find the separating hyperplane wx=r that maximizes the margin distance 1/||w||2^2. It can be formalized as an optimization problem that minimizes the hinge loss Ʃ[subscript ...
A cultural, community-based approach to health technology design
(Georgia Institute of Technology, 2011-06-29)
This research has examined how Information and Communication Technologies (ICTs) can promote healthy eating habits amongst African Americans in low-income neighborhoods, a population that faces disproportionately high rates ...
Tectonic smoothing and mapping
(Georgia Institute of Technology, 2011-05-16)
Large-scale mapping has become the key to numerous applications, e.g. simultaneous localization and mapping (SLAM) for autonomous robots. Despite of the success of many SLAM projects, there are still some challenging ...
Making infrastructure visible: a case study of home networking
(Georgia Institute of Technology, 2011-06-24)
In this dissertation, I examine how making infrastructure visible affects users' engagement with that infrastructure, through the case study of home networking. I present empirical evidence of the visibility issues that ...
Enabling collaborative behaviors among cubesats
(Georgia Institute of Technology, 2011-07-08)
Future spacecraft missions are trending towards the use of distributed systems or fractionated spacecraft. Initiatives such as DARPA's System F6 are encouraging the satellite community to explore the realm of collaborative ...
Data and application migration in cloud based data centers --architectures and techniques
(Georgia Institute of Technology, 2011-05-19)
Computing and communication have continued to impact on the way we run business, the way we learn, and the way we live. The rapid technology evolution of computing has also expedited the growth of digital data, the workload ...