New Technologies Fuel Cryo-EM's Renaissance
In a pair of breakthrough Nature papers, researchers in Eva Nogales’ Lab at UC Berkeley mapped two important protein functions in unprecedented detail. These papers are representative of the renaissance currently under way in the field of cryo-electron microscopy (cryo-EM), a renaissance driven primarily by the rise of cutting-edge electron detector cameras, sophisticated image processing software and access to NERSC supercomputing resources.
NSF Cybersecurity Center of Excellence, ESnet Organize Working Group on Open Science Threats
Managing the security risks to scientific instruments, data and cyberinfrastructure is a priority for creating a trustworthy environment for science. Assessing and managing the risks to the integrity and availability of science, and sometimes also privacy issues, involves making judgments on the likelihood and consequences of threats. So, Berkeley Lab's Sean Peisert and ESnet's Michael Dopheide helped organize a working group of nine scientists and cybersecurity leaders from across the country to discuss solutions to emerging threats to open science.
After 29 Years at the Lab, ESnet's Christman Retiring
When John Christman enlisted in the U.S. Navy the day after his 18th birthday, he was hoping to work as either a welder or machinist. But he scored too high on the skills assessment and instead ended up studying advanced electronics. It was one of those twists of fate that set his whole career in motion. On June 29, Christman will leave the lab after 29+ years, the last 10 as a network engineer with ESnet.
He started out with two years of electronics school in the Navy, going to class eight hours a day and learning about vacuum tubes, transistors and programming. And while the technology changed, the nature of Christman’s work remained constant – understanding and maintaining systems to ensure that users were able to reliably get the information they needed.
“Every year you learn something new – that’s what I love about the lab,” he said. “You’re always at the cutting edge, nothing gets stale.”
As a parting gift (and just in time for your July 4th cookout), Christman offers his award-winning recipe for grilled steak with whiskey-peppercorn sauce.
This Week's CS Seminars
Monday, June 27
"Optimizing Query Processing in Cache-Aware Wireless Sensor Networks"
3 – 4 p.m., Bldg. 50A Room 5132
Mario A. Nasciment, University of Alberta, Canada
This talk will be divided in three parts. In the first part I will give a short introduction to wireless sensor networks (WSNs), their applications and its data management aspect. Next, I will briefly present different problems (and solutions) related to data management within wireless sensor networks that I have work on in the past. Finally, in the third (and longer) part of the talk I will present in more details the work referred to in the title, which is described as follows. Most models for WSNs assume the existence of a base station where query results could in principle be cached, however, the opportunity for re-using such cached data for minimizing data traffic in the WSN has not been well explored thus far. Aiming at filling this gap, we propose an approach that first clips the original query into a polygon after selectively choosing a good subset of the cached queries for reuse. Next, this polygon is partitioned into sub-queries that are then submitted to the WSN. These two problems are interconnected and lead to a combinatorial problem that justifies the use of efficient and effective heuristics. This talk presents algorithms for each of these problems, which are then used within a cost-driven optimization search in order to find a set of sub-queries that minimizes the energy cost of in-network query processing. Experimental results show that our heuristic solution is orders of magnitude faster than an exhaustive search, and yields no more than 10% loss compared to the optimal query processing.