Browsing CSAIL Digital Archive by Title
Now showing items 505-524 of 806
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On the Formal Semantics of the Cognitive Middleware AWDRAT
(2015-03-03)The purpose of this work is two fold: on one hand we want to formalize the behavior of critical components of the self generating and adapting cognitive middleware AWDRAT such that the formalism not only helps to understand ... -
On the Max-Flow Min-Cut Ratio for Directed Multicommodity Flows
(2003-07-05)We give a pure combinatorial problem whose solution determines max-flow min-cut ratio for directed multicommodity flows. In addition, this combinatorial problem has applications in improving the approximation factor of ... -
On the Non-Existence of Blockwise 2-Local PRGs with Applications to Indistinguishability Obfuscation
(2017-04-06)Lin and Tessaro (Eprint 2017/250) recently proposed indistinguishability obfuscation and functional encryption candidates and proved their security based on a standard assumption on bilinear maps and a non-standard assumption ... -
On Using First-Order Theorem Provers in the Jahob Data Structure Verification System
(2006-11-09)This paper presents our integration of efficient resolution-based theorem provers into the Jahob data structure verification system. Our experimental results show that this approach enables Jahob to automatically ... -
On Verifying a File System Implementation
(2004-05-06)We present a correctness proof for a basic file system implementation. This implementation contains key elements of standard Unix file systems such as inodes and fixed-size disk blocks. We prove the implementation correct ... -
One Clock to Rule Them All: A Primitive for Distributed Wireless Protocols at the Physical Layer
(2014-04-27)Implementing distributed wireless protocols at the physical layer today is challenging because different nodes have different clocks, each of which has slightly different frequencies. This causes the nodes to have frequency ... -
One Video Stream to Serve Diverse Receivers
(2008-10-18)The fundamental problem of wireless video multicast is to scalably serve multiple receivers which may have very different channel characteristics. Ideally, one would like to broadcast a single stream that allows each ... -
One-Shot Learning with a Hierarchical Nonparametric Bayesian Model
(2010-10-13)We develop a hierarchical Bayesian model that learns to learn categories from single training examples. The model transfers acquired knowledge from previously learned categories to a novel category, in the form of a prior ... -
Online Active Learning in Practice
(2007-01-23)We compare the practical performance of several recently proposed algorithms for active learning in the online setting. We consider two algorithms (and their combined variants) that are strongly online, in that they do ... -
Online Learning of Non-stationary Sequences
(2005-11-17)We consider an online learning scenario in which the learner can make predictions on the basis of a fixed set of experts. We derive upper and lower relative loss bounds for a class of universal learning algorithms involving ... -
Oort: User-Centric Cloud Storage with Global Queries
(2016-12-08)In principle, the web should provide the perfect stage for user-generated content, allowing users to share their data seamlessly with other users across services and applications. In practice, the web fragments a user's ... -
OpenTuner: An Extensible Framework for Program Autotuning
(2013-11-01)Program autotuning has been shown to achieve better or more portable performance in a number of domains. However, autotuners themselves are rarely portable between projects, for a number of reasons: using a domain-informed ... -
An Operating System for Multicore and Clouds: Mechanisms and Implementation
(2010-02-08)Cloud computers and multicore processors are two emerging classes of computational hardware that have the potential to provide unprecedented compute capacity to the average user. In order for the user to effectively harness ... -
OpLog: a library for scaling update-heavy data structures
(2014-09-16)Existing techniques (e.g., RCU) can achieve good multi-core scaling for read-mostly data, but for update-heavy data structures only special-purpose techniques exist. This paper presents OpLog, a general-purpose library ... -
Optimal and Player-Replaceable Consensus with an Honest Majority
(2017-03-31)We construct a Byzantine Agreement protocol that tolerates t < n/2 corruptions, is very efficient in terms of the number of rounds and the number of bits of communication, and satisfies a strong notion of robustness called ... -
Optimal Approximations of the Frequency Moments
(2004-07-02)We give a one-pass, O~(m^{1-2/k})-space algorithm for estimating the k-th frequency moment of a data stream for any real k>2. Together with known lower bounds, this resolves the main problem left open by Alon, Matias, ... -
Optimal Bidirectional Rapidly-Exploring Random Trees
(2013-08-15)In this paper we present a simple, computationally-efficient, two-tree variant of the RRT* algorithm along with several heuristics. -
Optimal Parametric Auctions
(2012-05-08)We study the problem of profit maximization in auctions of one good where the buyers' valuations are drawn from independent distributions. When these distributions are known to the seller, Myerson's optimal auction is a ... -
Optimal Parametric Auctions
(2012-06-14)We study the problem of an auctioneer who wants to maximize her profits. In our model, there are n buyers with private valuations drawn from independent distributions F_1,...,F_n. When these distributions are known to the ... -
Optimal Rates for Regularization Operators in Learning Theory
(2006-09-10)We develop some new error bounds for learning algorithms induced by regularization methods in the regression setting. The "hardness" of the problem is characterized in terms of the parameters r and s, the first related ...
