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Olivia Simpson

dblp:136/8621 · DBLP profile ↗
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4ranked-venue papers
1as first author
0since 2021 · last 2015
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Theory of computation · 3Artificial intelligence and machine learning · 1 · 1 first-authorDatabases, data management, data science and information retrieval · 1 · 1 first-author

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Theoretical computer science
1 paper
Algorithms and data structures · 77% Information theory · 23%
Databases, data mining, and information retrieval
1 paper
Data mining · 100%

Topics — the 3 heaviest of 3, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Data mining › structured data mining › graph mining
graph property estimation
0.212015
Catching the Head, Tail, and Everything in Between: A Streaming Algorithm for the Degree Distribution · ICDM 2015
Algorithms and data structures › data streams
streaming algorithms
0.212015
Catching the Head, Tail, and Everything in Between: A Streaming Algorithm for the Degree Distribution · ICDM 2015
Information theory › probability theory
probability metrics
0.112015
Catching the Head, Tail, and Everything in Between: A Streaming Algorithm for the Degree Distribution · ICDM 2015

Methods — techniques the papers use, named apart from their topics

truncated geometric random variable estimator · 0.4relative hausdorff distance · 0.4
YearPublicationVenuePosition
2015 Catching the Head, Tail, and Everything in Between: A Streaming Algorithm for the Degree Distribution
abstract
The degree distribution is one of the most fundamental graph properties of interest for real-world graphs. It has been widely observed in numerous domains that graphs typically have a tailed or scale-free degree distribution. While the average degree is usually quite small, the variance is quite high and there are vertices with degrees at all scales. We focus on the problem of approximating the degree distribution of a large streaming graph, with small storage. We design an algorithm headtail, whose main novelty is a new estimator of infrequent degrees using truncated geometric random variables. We give a mathematical analysis of headtail and show that it has excellent behavior in practice. We can process streams will millions of edges with storage less than 1% and get extremely accurate approximations for all scales in the degree distribution. We also introduce a new notion of Relative Hausdorff distance between tailed histograms. Existing notions of distances between distributions are not suitable, since they ignore infrequent degrees in the tail. The Relative Hausdorff distance measures deviations at all scales, and is a more suitable distance for comparing degree distributions. By tracking this new measure, we are able to give strong empirical evidence of the convergence of headtail.
Olivia Simpson, Seshadhri Comandur, Andrew McGregor 0001
ICDM1
2015 Distributed Algorithms for Finding Local Clusters Using Heat Kernel Pagerank
Fan Chung Graham, Olivia Simpson
WAW2
2014 Computing Heat Kernel Pagerank and a Local Clustering Algorithm
Fan Chung Graham, Olivia Simpson
IWOCA2
2013 Solving Linear Systems with Boundary Conditions Using Heat Kernel Pagerank
Fan Chung Graham, Olivia Simpson
WAW2