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Fitzhugh and Butts published in Advances in Life Course Research

Published on May 27, 2015 by

Lab member Sean Fitzhugh and PI Carter Butts published an article “A Life History Graph Approach to the Analysis and Comparison of Life Histories,” in an upcoming issue of Advances in Life Course Research. In this paper they develop a network representation of life histories, where each spell is a node and edges represent temporal overlap among spells. This enables systematic representation and comparison of life histories within and across populations, as well as insight into individual life histories through social network analysis. They identify the primary sources of differentiation across life histories using data from the United States, Vietnam, England, and China.

The article can be found online here.

 
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Lab member Fitzhugh to join US Army Research Laboratory

Published on April 10, 2015 by

Sean Fitzhugh has accepted a position as a Postdoctoral Fellow at the US Army Research Laboratory, where he will use network analysis to study the performance of task-oriented groups. Congratulations, Sean!

 
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NCASD lab participates in CENIC open house event

Published on March 16, 2015 by

As part of their annual conference, on March 10 the Corporation for Network Initiatives in California (CENIC) visited the various labs housed in Calit2. The NCASD lab created posters for the event, highlighting many of our projects, including work involving Twitter, sexual contact networks, chemical shift prediction, and the American Social Fabric Project. The visitors from CENIC were very enthusiastic about our work!

NCASD lab members at CENIC open house event

 
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Lab alum Jasny to join University of Exeter

Published on March 16, 2015 by

NCASD lab alum Lorien Jasny has accepted a position as Lecturer (an Assistant Professor in the UK system) in the Department of Politics at the University of Exeter. Congratulations, Lorien!

 
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Smith et al. Published in Journal of Gerontology: Social Sciences

Published on September 12, 2014 by

Lab member Emma Smith, along with alumni Chris Marcum, Adam Boessen, and Zack Almquist, collaborators John Hipp and Nicholas Nagle, and lab PI Carter Butts have had their article, “The Relationship of Age to Personal Network Size, Relational Multiplexity, and Proximity to Alters in the Western United States” accepted for publication in a forthcoming special issue of the Journal of Gerontology: Social Sciences on social networks.

The paper examines the association of age and other socio-demographic variables with properties of personal networks; using samples of individuals residing in the rural western United States and the City of Los Angeles, we evaluate the degree to which these associations vary with geographical context. For both rural and urban populations we find a non-monotone association between age and numbers of core discussants and emergency contacts, with rural populations also showing non-monotone associations for social activity partners. These non-monotone relationships show a peak in expected degree at midlife, followed by an eventual decline. We find a decline in degree among the elderly for all relations in both populations. Age is positively associated with distance to non-household alters for the rural population, although residential tenure is associated with shorter ego-alter distances in both rural and urban settings. Additionally, age is negatively associated with network multiplexity for both populations.

 
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Lab alum Spiro named as one of the “Top 30 Thinkers Under 30″

Published on April 2, 2014 by

Lab alum Emma Spiro was named by Pacific Standard as one of the Top 30 Thinkers Under 30 for her work using Twitter to study disaster response. For additional information, see the post here. Congratulations, Emma!

 
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NCASD lab members to present at 2014 Sunbelt Conference

Published on February 19, 2014 by

NCASD lab members will be presenting at the 2014 Sunbelt Conference in St. Pete Beach Florida from February 18-23.

Sean Fitzhugh is presenting his joint work with Carter Butts on linking shared social contexts to shared structural contexts.  They introduce a family of techniques that relate subgroup co-membership to shared individual features in order to determine how shared attributes may drive group formation.

Ben Gibson is presenting his work with Yue Yu, Zack Almquist, and Carter Butts on a scalable approach to approximate TERGM inference for certain dynamic network regression families, that can scale to arbitrarily large populations.

Emma Smith is presenting joint work with Chris Marcum, Adam Boessen, Zack Almquist, John Hipp, Nicholas Nagle, and Carter Butts on the relationship of age to personal network size, relational multiplexity, and proximity to alters among rural and urban populations in the western United States.

Xuhong Zhang is presenting her work with Carter Butts on a new method for inferring relationships by exploiting the distributional and spectral structure of activity correlation within dyads. They demonstrate methodology via an application to detection of friendship and group co-membership using data from mobile devices.

Yue Yu is presenting her joint work with Emma Smith and Carter Butts on the evaluation of different retrospective life history designs through an examination of the accumulation of missingness as a function of time prior to interview, and the investigation of the impact of this missing data on model-based imputation of the state of the network at prior time points via conditional ERGM prediction.

Lab PI Butts will be presenting work on novel methods for fitting ERGMs to multiple networks – e.g., sets of networks arising from population or experimental studies, or network time series.  These new methods are scalable to collections of hundreds or even thousands of networks, with minimal increase in computational cost.

Good luck to all!

For more information, see here.

 
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Lab member Smith highlighted in the Mathematical Sociologist newsletter

Published on February 19, 2014 by

NCASD lab member Emma Smith was highlighted as a graduate student in mathematical sociology in the 2013-2014 Fall/Winter issue of the Mathematical Sociologist, the newsletter for the ASA section for Mathematical Sociology.

The newsletter can be found here.

 
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Lab Alum Spiro Studies How Brazilian Protestors Use Twitter

Published on July 8, 2013 by

NCASD lab alum Emma Spiro, interning at Microsoft Research (MSR) this summer, is studying the relationship between social media and the recent Brazilian uprising. The research, done in collaboration with MSR researcher Andrés Monroy-Hernández, looks at how the protestors use social media, particularly Twitter, to share their experiences and invite others to join the protests. Findings currently include information about the peak of the protests’ tweets, the international nature of the protests, and the interaction network among the most active users.

Their research was recently highlighted by The Guardian Datablog.

Spiro and Monroy-Hernández were also interviewed by techPresident.com about the research. Article found here.

For additional information, please see the original blog post about the project here.

 
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HEROIC Research Featured by Calit2 Newsroom

Published on June 30, 2013 by

The HEROIC project was featured in a recent article by the California Institute for Telecommunications and Information Technology (Calit2).

The article can be found here.

 
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