Society for Industrial and Applied Mathematics in the news
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en-usLatest news from Society for Industrial and Applied MathematicsMathematical models with complicated dynamics for disease studyA paper to be published this week in the SIAM Journal on Applied Dynamical Systems presents a mathematical model to study the effects of individual movement on infectious disease spread.
http://phys.org/news/2015-06-mathematical-complicated-dynamics-disease.html
Mathematics Thu, 11 Jun 2015 09:30:01 EDTnews353231056Modeling storm surge to better protect TexasThe recent floods in Texas have caused some of the worst flooding since Hurricane Ike in 2008, causing the rainiest month in the state's history.
http://phys.org/news/2015-05-storm-surge-texas.html
Earth Sciences Fri, 29 May 2015 15:04:40 EDTnews352130674Should a political party form a coalition? Voters and math decideMathematical ideas and tools are often used to describe aspects of large macroscopic systems. Examples abound in areas as varied as finance to psychology. In a paper published last month in the SIAM Journal on Applied Mathematics, author Fabio Bagarello proposes mathematical models to analyze political decision-making. Using a dynamical approach which accounts for interactions between political parties and their constituents, the model tries to deduce whether parties should form coalitions under various circumstances.
http://phys.org/news/2015-04-political-party-coalition-voters-math.html
Mathematics Wed, 15 Apr 2015 16:34:10 EDTnews348334434Decision cascades in social networksHow do people in a social network behave? How are opinions, decisions and behaviors of individuals influenced by their online networks? Can the application of math help answer these questions?
http://phys.org/news/2014-12-decision-cascades-social-networks.html
Mathematics Mon, 22 Dec 2014 12:52:42 EDTnews338475147When vaccines are imperfect: What math can tell us about their effects on disease propagationThe control of certain childhood diseases is difficult, despite high vaccination coverage in many countries. One of the possible reasons for this is "imperfect vaccines," that is, vaccines that fail either due to "leakiness," lack of effectiveness on certain individuals in a population, or shorter duration of potency.
http://phys.org/news/2014-11-vaccines-imperfect-math-effects-disease.html
Mathematics Thu, 20 Nov 2014 16:00:01 EDTnews335714306Insightful mathematics for an optimal run: Mathematical equations can help improve athletic performanceSure, we can become better runners by hydrating well, eating right, cross training, and practice. But getting to an optimal running strategy with equations? That's exactly what a pair of mathematicians from France propose in a paper published this month in the SIAM Journal on Applied Mathematics.
http://phys.org/news/2014-10-insightful-mathematics-optimal-mathematical-equations.html
Mathematics Mon, 27 Oct 2014 10:01:43 EDTnews333622896Where is that spacecraft? Statistically measuring uncertainty for space surveillanceSpace surveillance is inherently challenging when compared to other tracking environments due to various reasons, not least of which is the long time gap between surveillance updates. "Unlike the air and missile defense environments where objects are frequently observed, the space surveillance environment data is starved, with many objects going several orbital periods between observations," according to researcher Joshua Horwood. "Thus, it is more challenging to predict the future location of these sparsely-seen objects and they have a tendency to get lost using traditional methods. A new way of tracking them, the Gauss von Mises (GVM) distribution, has improved predictive capabilities that permit one to more effectively maintain custody of infrequently-observed space objects."
http://phys.org/news/2014-09-spacecraft-statistically-uncertainty-space-surveillance.html
Mathematics Mon, 22 Sep 2014 08:45:58 EDTnews330594351A model for Bluetongue disease dynamics in cattleIn a paper recently published in the SIAM Journal on Mathematical Analysis, authors Stephen Gourley, Gergely Röst, and Horst Thieme model disease persistence of a virus called Bluetongue using a system of several delay differential equations. The disease affects sheep and cattle, and is spread by biting midges. In sheep, the bluetongue virus can cause abortion, congenital abnormalities and death, though mild cases completely recover. In cattle, bluetongue does not generally cause death.
http://phys.org/news/2014-07-bluetongue-disease-dynamics-cattle.html
Mathematics Thu, 03 Jul 2014 05:20:01 EDTnews323582005Mathematically modeling species dispersalDispersal is an ecological process involving the movement of an organism or multiple organisms away from their birth site to another location or population where they settle and reproduce. An important topic in ecology and evolutionary biology, dispersal can either be random or directed. Random movement, as the name indicates, describes dispersal patterns that are unbiased and random, whereas directed or biased movement occurs when organisms sense and respond to local environmental cues by moving directionally. Dispersal is dependent on a variety of factors such as climate, food, and predators, and is often biased.
http://phys.org/news/2014-07-mathematically-species-dispersal.html
Mathematics Thu, 03 Jul 2014 05:10:02 EDTnews323581912Exploring human nature through the social webThe web grows larger and more social every day, allowing ordinary people to express themselves more publicly and permanently than ever before through blogs and social media such as Facebook, Twitter, YouTube, Instagram, and Foursquare.
http://phys.org/news/2014-07-exploring-human-nature-social-web.html
Mathematics Tue, 01 Jul 2014 14:54:08 EDTnews323445198Traveling waves model tumor invasionCell migration, which is involved in wound healing, cancer and tumor growth, and embryonic growth and development, has been a topic of interest to mathematicians and biologists for decades.
http://phys.org/news/2014-06-tumor-invasion.html
Cell & Microbiology Wed, 25 Jun 2014 13:12:53 EDTnews322920764Putting a number on opinion dynamics in a populationOpinion formation in a large population is influenced by both endogenous factors, such as interaction with one's peers—in-person and via social media—as well as exogenous factors, such as the media, of which mainstream media is one of the most influential factors. For example, according to a study conducted by the National Bureau of Economic Research in 2006, after the introduction and expansion of Fox News in the United States between 1996 and 2000, an estimated 3-28% of the audience was persuaded to vote Republican.
http://phys.org/news/2014-05-opinion-dynamics-population.html
Mathematics Thu, 22 May 2014 13:15:18 EDTnews319983271Math modeling handbook now availableMath comes in handy for answering questions about a variety of topics, from calculating the cost-effectiveness of fuel sources and determining the best regions to build high-speed rail to predicting the spread of disease and assessing roller coasters on the basis of their "thrill" factor. How does math do all that?
http://phys.org/news/2014-04-math-handbook.html
Mathematics Wed, 23 Apr 2014 13:51:50 EDTnews317479899Overcoming structural uncertainty in computer modelsA computer model is a representation of the functional relationship between one set of parameters, which forms the model input, and a corresponding set of target parameters, which forms the model output. A true model for a particular problem can rarely be defined with certainty. The most we can do to mitigate error is to quantify the uncertainty in the model.
http://phys.org/news/2014-04-uncertainty.html
Mathematics Tue, 01 Apr 2014 11:49:05 EDTnews315571732Math models analyze long-term criminal activity patterns in a populationIn a paper published last November in Multiscale Modeling and Simulation: A SIAM Interdisciplinary Journal, authors Henri Berestycki, Nancy Rodríguez, and Lenya Ryzhik show that the assumption of a population's natural tendency towards crime significantly changes long-term criminal activity patterns. The authors use a reaction-diffusion system to study criminal activity.
http://phys.org/news/2014-03-math-long-term-criminal-patterns-population.html
Mathematics Wed, 19 Mar 2014 08:40:01 EDTnews314431164Mathematically correcting over- and underexposure in photographsAlmost anyone with a camera or smartphone is sure to have noticed that taking pictures in bright conditions, such as a sunny day, can cause a loss of highlight details (or overexposure) in bright regions and a loss of shadow details (or underexposure) in dark regions. A paper published last November in the SIAM Journal on Imaging Science attempts to overcome these photography woes.
http://phys.org/news/2014-03-mathematically-over-underexposure.html
Mathematics Wed, 19 Mar 2014 07:40:03 EDTnews314431032Improving radiation therapies for cancer mathematicallyIn 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.
http://phys.org/news/2014-03-therapies-cancer-mathematically.html
Mathematics Wed, 05 Mar 2014 16:21:44 EDTnews313258893Statistics research could build consensus around climate predictionsVast amounts of data related to climate change are being compiled by research groups all over the world. Data from these many and various 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.
http://phys.org/news/2014-02-statistics-consensus-climate.html
Mathematics Wed, 19 Feb 2014 15:33:30 EDTnews312046399A mathematical perspective of seasonal variations in Lyme disease transmissionLyme disease is a common tick-borne illness caused by a bacterium, which is transmitted to humans through the bite of infected ticks. The transmission dynamics of Lyme disease is dependent on a variety of factors, including the length of the tick's life cycle, availability of hosts, climatic conditions and seasonal influences, which are important to understand for control strategies.
http://phys.org/news/2013-12-mathematical-perspective-seasonal-variations-lyme.html
Mathematics Thu, 19 Dec 2013 13:02:43 EDTnews306680533Math models enhance current therapies for coronary heart diseaseCoronary 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.
http://phys.org/news/2013-12-math-current-therapies-coronary-heart.html
Mathematics Mon, 09 Dec 2013 12:32:48 EDTnews305814742An intersection of math and biology: Clams and snails inspire robotic diggers and crawlers (w/ Video)Engineering has always taken cues from biology. Natural organisms and systems have done well at evolving to perform tasks and achieve objectives within the limits set by nature and physics.
http://phys.org/news/2013-11-intersection-math-biology-clams-snails.html
Engineering Mon, 11 Nov 2013 16:57:52 EDTnews303411461Are you ready to retire? Mathematical models estimate the value of pension plansThere comes a time in each of our lives when we consider starting a pension plan –either on the advice of a friend, a relative, or of our own volition. The plan of choice may depend on various factors, such as the age and salary of the individual, number of years of expected employment, as well as options to retire early or late.
http://phys.org/news/2013-10-ready-mathematical-pension.html
Mathematics Mon, 21 Oct 2013 17:02:49 EDTnews301593725Seamless photography: Using mathematical models for image stitchingA photo captures only as much as the camera in use will allow, and is therefore limited by the field of view of the camera's lens. In the case of smartphones and many advanced cameras, the view from the lens is much smaller than the view from your own eyes.
http://phys.org/news/2013-10-seamless-photography-mathematical-image.html
Computer Sciences Wed, 02 Oct 2013 12:25:58 EDTnews299935539Tracking criminal movement using math: Will the next strike be near or far away?One way to study criminal behavior and predict a criminal's next move is by analyzing his or her movement. Several mathematical models have addressed this in detail, in particular, the UCLA "burglary hotspot" model, also the topic of a previous Nugget published by the Society for Industrial and Applied Mathematics (SIAM).
http://phys.org/news/2013-09-tracking-criminal-movement-math.html
Mathematics Thu, 12 Sep 2013 13:13:01 EDTnews298210370Using math models to make predictions: How vegetation competes for rainfall in dry regionsThe greater the plant density in a given area, the greater the amount of rainwater that seeps into the ground. This is due to a higher presence of dense roots and organic matter in the soil. Since water is a limited resource in many dry ecosystems, such as semi-arid environments and semi-deserts, there is a benefit to vegetation to adapt by forming closer networks with little space between plants.
http://phys.org/news/2013-08-math-vegetation-rainfall-regions.html
Mathematics Fri, 30 Aug 2013 11:49:57 EDTnews297082184Stabilizing aircraft during takeoff and landing using mathOne of the lesser known concerns about commercial aircraft is their stability on the ground during taxiing, takeoff, and landing. During these processes, planes must maintain stability under various operating conditions. However, in some situations, the aircraft landing gear displays unwanted oscillations, which are referred to as shimmy oscillations.
http://phys.org/news/2013-08-stabilizing-aircraft-takeoff-math.html
Mathematics Tue, 20 Aug 2013 12:27:00 EDTnews296220402Surges in latent infections: Mathematical analysis of viral blipsRecurrent infection is a common feature of persistent viral diseases. It includes episodes of high viral production interspersed by periods of relative quiescence. These quiescent or silent stages are hard to study with experimental models. Mathematical analysis can help fill in the gaps.
http://phys.org/news/2013-05-surges-latent-infections-mathematical-analysis.html
Mathematics Fri, 31 May 2013 22:40:01 EDTnews289256900Mathematical models to better combat HIVThe first few hours to days following exposure to human immunodeficiency virus (HIV) can be of critical importance in determining if infection occurs in a patient. But the low numbers of viruses and infected cells at this stage makes it very difficult to study these events in humans or animal models.
http://phys.org/news/2013-05-mathematical-combat-hiv.html
Mathematics Fri, 31 May 2013 22:03:53 EDTnews289256625Can math models of gaming strategies be used to detect terrorism networks?The answer is yes, according to a paper in the SIAM Journal on Discrete Mathematics. In a paper published in the journal last month, authors Anthony Bonato, Dieter Mitsche, and Pawel Pralat describe a mathematical model to disrupt flow of information in a complex real-world network, such as a terrorist organization, using minimal resources.
http://phys.org/news/2013-05-math-gaming-strategies-terrorism-networks.html
Mathematics Thu, 16 May 2013 14:02:41 EDTnews287931705Finding a sensible balance for natural hazard mitigation with mathematical modelsUncertainty issues are paramount in the assessment of risks posed by natural hazards and in developing strategies to alleviate their consequences.
http://phys.org/news/2013-04-natural-hazard-mitigation-mathematical.html
Mathematics Tue, 30 Apr 2013 14:40:53 EDTnews286551644