SAND Number: 2012-6677 P

Subsurface processes, including transport of CO2, originate from chemical and physical interactions at the molecular and nano scale, even though they are played out as macroscopic material and dynamical properties of a meter to multi kilometer scale geologic system. The DOE funded Energy Frontier Research Center called the Center for Nanoscale Controls on Geologic CO2 (NCGC) aims to improve our ability to understand and predict the performance of underground CO2 storage systems.

SAND Number: 2012-6913P
Urban Ops Hopper - BD

(Sarah Low 08539)

SAND Number: 2012-6912P
Urban Ops Hopper - SNL

(Sarah Low 08539)

SAND Number: 2012-6912P
SAND Number: 2012-6913P
Urban Ops Hopper - BD & SNL
(Sarah Low 08539)

SAND Number: 2012-3306 P
Internal Release Only - Presenter: Ed Lu
Distinguished speaker Dr. Edward Lu will discuss the physics, economics, and politics of preventing asteroid impacts on Earth, and recent developments in efforts to map the Solar System for threatening asteroids. A noted scientist and technologist, Dr. Lu is a former NASA astronaut known for tackling and solving complex technical and strategic challenges. Dr. Lu�s interest in asteroid deflection led to formation of the nonprofit B612 Foundation for which he serves as Chairman and CEO.

SAND Number: 2012-2301P
Hydrology Time Capsule: R. Allan Freeze - Underground water flow.

SAND Number: 2012-5149P
Presenter: Professor Sarah Stewart
During the end stage of accretion, giant impacts leave an indelible mark on the final physical and dynamical properties of a terrestrial planet. Giant impacts are invoked to explain the large core of Mercury, the retrograde spin of Venus, the crustal thickness asymmetries on the Moon and Mars, and the origin of the moons around Earth and Pluto. The diversity of features arises from the large range of impact outcomes encountered during the end stage of planet formation. Using recent results on the dynamics and thermodynamics of giant impacts, I will describe their effects on the physical properties of the final planets and address the current debates on the origin of the Moon and Mercury.

SAND Number: 2012-3722 P
DARPA Hand

SAND Number: 2012-3307 P
Internal Release Only - Bioscience/Material Science Speaker Series
Presenter: Dr. Tandy Warnow
Phylogenetic placement arises in the analysis of metagenomic data, in which the objective is to insert short molecular sequences (called "query sequences") into an existing phylogenetic tree and alignment on full-length sequences for the same gene. We present SEPP, a general ``boosting" technique to improve the accuracy and/or speed of phylogenetic placement techniques. The key algorithmic aspect of SEPP is a dataset decomposition technique in SATe (Liu et al., Science 2009 and Systematic Biology (in press), a method that utilizes an iterative divide-and-conquer technique to co-estimate alignments and trees on large molecular sequence datasets. We show that SEPP improves current phylogenetic placement methods, placing metagenomic sequences more accurately when the set of input sequences has a large evolutionary diameter and produces placements of comparable accuracy in a fraction of the time for easier cases. We then show that a combination of Metaphyler (Liu et al, BMC Genomics 2011) and SEPP produces dramatically improved accuracy over all current taxon identification methods.
Joint work with Siavash Mirarab and Nam Nguyen, PhD students at UT-Austin, and Bo Liu and Mihai Pop at the University of Maryland.

SAND Number: 2012-4053 P
Panel Presentation.
Description: Using smart meters as a motivating engineering challenge. This session will consider how smart meters could be designed to provide robust authentication of access control to prevent an electrical "denial of service" attack. Participants will be given additional background before the workshop outlining desired functional requirements and perceived engineering challenges related to how a very inexpensive, mass-produced secure smart meter could be designed and validated drawing largely on untrusted commercial components. What are the existing security approaches, architectures, and technologies that could be applied? And the remaining research gaps? Would this problem be a good candidate for a national (or global) prize-based design competition?