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!
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 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!
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.
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!
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.
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.
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.
For additional information, please see the original blog post about the project here.
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.
Sutton presented on “Alerts, Warnings, and Social Media: what works, what doesn’t, what makes a difference” to a standing room only crowd in Toronto on June 24, 2013 at the World Conference on Disaster Management. Drawing from current HEROIC project research efforts and the empirical record on disaster alerts and warnings, Sutton translated research findings into practical lessons for emergency managers who utilize new media as one channel among many for alerts and warnings in disaster events.
Twitter has become a redundant channel for crisis communicators in disaster. Effective messaging has become vital. This talk addresses how message content, style, and exposure predicts message dissemination in a disaster. Using data from empirical research over a set of different hazard events, we show ho message factors affect transmission across social networks online. From this, we identify the key elements that will lead to social amplification of crisis communications in disaster.