Improving radiation therapies for cancer mathematically
In a paper published in December in the SIAM Journal on Scientific Computing, authors Li-Tien Cheng, Bin Dong, Chunhua Men, Xun Jia, and Steve Jiang propose a method to optimize radiation therapy treatments in cancer patients.
Radiation therapy is one of the primary methods used for cancer treatment, along with chemotherapy and surgery. While doses of radiation are delivered to eliminate cancerous tissue, care is taken to keep radiation within acceptable levels so as not to affect neighboring tissues and organs. The most common type of therapy delivers high-energy radiation via a medical linear accelerator mounted on a rotating apparatus to adjust the direction, and a collimator to shape the beam of radiation. In the recently developed volumetric modulated arc therapy (VMAT), beams continuously deliver doses as the delivery device rotates around the patient. Enhancement of radiotherapy treatment is challenged by complexities of shape optimization, due to the mechanics of the equipment involved as well as the apertures of devices delivering the beams of radiation. Read the rest of this entry »
Philadelphia, PA—Vast amounts of data related to climate change are being compiled by research groups all over the world. Data from these many and varied sources results in diﬀerent climate projections; hence, the need arises to combine information across data sets to arrive at a consensus regarding future climate estimates.
In a paper published last December in the SIAM Journal on Uncertainty Quantification, authors Matthew Heaton, Tamara Greasby, and Stephan Sain propose a statistical hierarchical Bayesian model that consolidates climate change information from observation-based data sets and climate models.
“The vast array of climate data—from reconstructions of historic temperatures and modern observational temperature measurements to climate model projections of future climate—seems to agree that global temperatures are changing,” says author Matthew Heaton. “Where these data sources disagree, however, is by how much temperatures have changed and are expected to change in the future. Our research seeks to combine many different sources of climate data, in a statistically rigorous way, to determine a consensus on how much temperatures are changing.” Read the rest of this entry »
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Dear SIAM members,
Here’s wishing you the very best in 2014! As we ring in the New Year, we welcome our new Board, Council and Activity Group officers. Read details on them below.
Though 2013 is past us, we don’t have to leave Mathematics of Planet Earth behind. The successful year-long initiative continues on. Please visit mpe2013.org for details on what to expect in 2014. Read the rest of this entry »
Equations help explain key parameters of stents that combat artherosclerosis
Philadelphia, PA—Coronary heart disease accounts for 18% of deaths in the United States every year. The disease results from a blockage of one or more arteries that supply blood to the heart muscle. This occurs as a result of a complex inflammatory condition called artherosclerosis, which leads to progressive buildup of fatty plaque near the surface of the arterial wall.
In a paper published last month in the SIAM Journal on Applied Mathematics, authors Sean McGinty, Sean McKee, Roger Wadsworth, and Christopher McCormick devise a mathematical model to improve currently-employed treatments of coronary heart disease (CHD).
“CHD remains the leading global cause of death, and mathematical modeling has a crucial role to play in the development of practical and effective treatments for this disease,” says lead author Sean McGinty. “The use of mathematics allows often highly complex biological processes and treatment responses to be simplified and written in terms of equations which describe the key parameters of the system. The solution of these equations invariably provides invaluable insight and understanding that will be crucial to the development of better treatments for patients in the future.” Read the rest of this entry »
From the Simons Foundation. Please read full announcement here.
The Simons Foundation’s Division for Mathematics and the Physical Sciences invites applications for grants to mathematicians to stimulate collaboration in the field primarily through the funding of travel and related expenditures.
The goal of the program is to support the ‘mathematical marketplace’ by substantially increasing collaborative contacts between mathematicians. The foundation will make a large number of grants to accomplished, active researchers in the United States who do not otherwise have access to funding for research that supports travel and visitors.
Applicants must have a tenure-track or tenured position, or be a professor emeritus, at a U.S. institution of higher education. They must have a current record of active research and publication in high-quality journals and not hold any other grants of over $3,000 per year that allow for support for travel or visitors during the Collaboration Grant award period.
Applicants may apply through proposalCENTRAL beginning September 1, 2013. The deadline to apply is January 31, 2014.
Read the following post by the University of Florida SIAM student chapter for details on their third SIAM Gators Conference.
The Third University of Florida SIAM Gators Conference will take place March 27-29, 2014, in the Mathematics Department of the University of Florida. The conference focuses on the following three areas:
1. Numerical Optimization and Applications
2. Mathematical Algorithms in Imaging
3. Mathematical Biology and Modelling Read the rest of this entry »
News & announcements for the SIAM membership community
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Dear SIAM members,
Can you nominate a SIAM Fellow? Help SIAM honor members for their distinguished contributions to the disciplines served by SIAM as well as make outstanding members more competitive for awards and leadership positions in broader society.
Inducted Fellows for the Class of 2014 will be recognized at the SIAM Annual Meeting to be held in Chicago next July. Each current (non-student) SIAM member may make up to two nominations per year.
SIAM provided over $39,500 to 85 chapters to support activities during the 2012-2013 academic year. The activities that they planned were limited only by their imaginations. Here are some of the exciting activities that SIAM chapters sponsored during the 2012-2013 academic year.
On April 27-28, college math students in the greater Chicago area convened at the first annual Chicago Area SIAM Student Conference (CASSC), hosted by the University of Illinois at Chicago. The event was a collaboration between the SIAM chapters of UIC, Northwestern University, and Illinois Institute of Technology. It featured three plenary speakers, numerous talks from graduate students, a poster session, and a career panel. Next year’s conference will be held next spring at Northwestern University. Read the rest of this entry »