Logo: University of Southern California

Events Calendar



Events for January

  • AI Seminar: General Methods for Causal Discovery

    Wed, Jan 14, 2015 @ 11:00 AM - 12:00 PM

    Information Sciences Institute

    Conferences, Lectures, & Seminars


    Speaker: Frederick Eberhardt, Caltech, Professor of Philosophy at Caltech

    Talk Title: General Methods for Causal Discovery

    Series: AISeminar

    Abstract: This talk will consist of two parts, both concerned with causal discovery. In the first part I will describe some methods we have developed to perform causal inference with very weak background assumptions. The problem of causal discovery is converted into a constraint optimization problem that is then solved using maxSAT solvers. This general framework allows for the inclusion of very general background knowledge and only requires extremely weak model space assumptions. We show in simulations that for the restricted domains in which an exact Bayesian computation can be performed, our methods achieve an accuracy very close to that of the exact Bayesian computation. For more general domains, no competing method exists. In the second part, I will describe some very recent research we have done on extracting causes of behavior from images. This research addresses the more general question of how causal macro-variables can be constructed from micro-variables (pixel data, in our case). We hope that our account can lay the groundwork for a more general approach to automated causal analysis of images and video data.

    Here are the relevant papers:
    First part: http://people.hss.caltech.edu/ fde/papers/HEJ_UAI2014.pdf
    Second part: http://arxiv.org/abs/1412.2309




    Biography: Frederick Eberhardt is Professor of Philosophy at Caltech. He is primarily interested in methods for causal discovery from statistical data, the use of experiments in causal discovery, the integration of causal inferences from different data sets and the philosophical issues at the foundations of causality and probability. His research focuses both on how methods of causal discovery can be constructed and on how humans and animals in fact learn about causal relations. Before joining Caltech in 2013, he was assistant professor in the philosophy-neuroscience-psychology program at Washington University in St Louis. He got his PhD from Carnegie Mellon in 2007 and was a postdoc in psychology at UC Berkeley until 2009.

    Host: Kun Zhang

    Webcast: http://webcasterms1.isi.edu/mediasite/Viewer/?peid=44b5327011024c03bc46967a538adc9d1

    Location: Information Science Institute (ISI) - 1135

    WebCast Link: http://webcasterms1.isi.edu/mediasite/Viewer/?peid=44b5327011024c03bc46967a538adc9d1d

    Audiences: Everyone Is Invited

    Posted By: Alma Nava / Information Sciences Institute

    OutlookiCal
  • NL Seminar- Understanding Analogies: Theory and Method

    Fri, Jan 23, 2015 @ 03:00 PM - 04:00 PM

    Information Sciences Institute

    Conferences, Lectures, & Seminars


    Speaker: Devin Griffiths , USC/Dornsife

    Talk Title: Understanding Analogies: Theory and Method

    Series: Natural Language Seminar

    Abstract: Analogies allow us to make connections between different domains of knowledge and to apply what we already know to new situations. For this reason, they're important to developing new theories and new understandings of the social and natural world, and have often been seen as an important task for machine learning. In my talk, I'll explore how different theories of how analogy works shape the different approaches that research teams take when modeling analogical thinking. Specifically, I'll contrast what I term "formal" or "top-down" theories of analogy with a "serial" or "bottom-up" approach. Finally, I'll describe a syntactic and semantic method for searching out analogies within corpora. I'm convinced that understanding analogies better, and being able to find locate new analogies in historical documents, can help us understand where new ideas come from.



    Biography: Devin Griffiths is an assistant professor in the English Department at USC, where he studies nineteenth-century British literature and scientific history. His current book project, titled "Between the Darwins," explores how analogies were used in the nineteenth century to create new theories of evolution and social progress. His areas of research include science and literature, poetics, book history, and the digital humanities.

    Host: Aliya Deri and Kevin Knight

    More Info: http://nlg.isi.edu/nl-seminar/
    Webcast: http://webcasterms1.isi.edu/mediasite/Viewer/?peid=56439af4a5cb41f49a2c5faef5683cd11

    Location: Information Science Institute (ISI) - Conference Room # 689, Marina del Rey

    WebCast Link: http://webcasterms1.isi.edu/mediasite/Viewer/?peid=56439af4a5cb41f49a2c5faef5683cd11d

    Audiences: Everyone Is Invited

    Posted By: Peter Zamar

    OutlookiCal