#### Filter Results:

#### Publication Year

2001

2016

#### Publication Type

#### Co-author

#### Key Phrase

#### Publication Venue

Learn More

Motivated by applications to sensor, peer-to-peer, and ad hoc networks, we study distributed algorithms, also known as gossip algorithms, for exchanging information and for computing in an arbitrarily connected network of nodes. The topology of such networks changes continuously as new nodes join and old nodes leave the network. Algorithms for such networks… (More)

A mechanism for releasing information about a statistical database with sensitive data must resolve a trade-off between utility and privacy. Publishing fully accurate information maximizes utility while minimizing privacy, while publishing random noise accomplishes the opposite. Privacy can be rigorously quantified using the framework of <i>differential… (More)

The effective resistance between two nodes of a weighted graph is the electrical resistance seen between the nodes of a resistor network with branch conductances given by the edge weights. The effective resistance comes up in many applications and fields in addition to electrical network analysis, including, for example, Markov chains and continuous-time… (More)

Ahtruct-Motivated by applications to sensor, peer-to-peer and ad hoc networks, we study distributed asyn-chronous algorithms, also known as gossip algorithms, for computation and information exchange in an arbitrarily connected network of nodes. Nodes in such networks operate under limited computational, communication and energy resources. These constraints… (More)

- Arpita Ghosh, Stephen Boyd
- 2007

— The algebraic connectivity of a graph is the second smallest eigenvalue of the graph Laplacian, and is a measure of how well-connected the graph is. We study the problem of adding edges (from a set of candidate edges) to a graph so as to maximize its algebraic connectivity. This is a difficult combinatorial optimization, so we seek a heuristic for… (More)

- Arpita Ghosh, Aaron Roth
- EC
- 2011

We initiate the study of markets for private data, through the lens of differential privacy. Although the purchase and sale of private data has already begun on a large scale, a theory of privacy as a commodity is missing. In this paper, we propose to build such a theory. Specifically, we consider a setting in which a data analyst wishes to buy information… (More)

- Arpita Ghosh, Stephen Boyd
- 2006

The second smallest eigenvalue of the Laplacian matrix L of a graph is called its algebraic connectivity. We describe a method for obtaining an upper bound on the algebraic connectivity of a family of graphs G. Our method is to maximize the second smallest eigenvalue over the convex hull of the Laplacians of graphs in G, which is a convex optimization… (More)

Many websites rank user-generated content (UGC) using viewer votes, displaying higher quality contributions more prominently and suppressing lower quality ones. Such an allocation of attention constitutes a mechanism, which can influence the quality of content elicited from attention-motivated contributors. In this paper, we analyze equilibrium behavior in… (More)

- Stephen Boyd, Arpita Ghosh, Seung-Jean Kim, Sanjay Lall, Pablo Parrilo, Amin Saberi Jun Sun +1 other
- 2006

We consider the problem of choosing the edge weights of an undirected graph so as to maximize or minimize some function of the eigenvalues of the associated Laplacian matrix, subject to some constraints on the weights, such as nonnegativity, or a given total value. In many interesting cases this problem is convex, i.e., it involves minimizing a convex… (More)

Display advertising has traditionally been sold via guaranteed contracts – a guaranteed contract is a deal between a publisher and an advertiser to allocate a certain number of impressions over a certain period, for a pre-specified price per impression. However, as spot markets for display ads, such as the RightMedia Exchange, have grown in prominence, the… (More)