SIAM Journal on Applied Mathematics in the news
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en-usLatest news from SIAM Journal on Applied MathematicsMathematically modeling HIV drug pharmacodynamics37 million people around the world today live with Human Immunodeficiency Virus (HIV), which is responsible for roughly 1.1 million deaths caused by AIDS-related conditions.
https://phys.org/news/2017-10-mathematically-hiv-drug-pharmacodynamics.html
Mathematics Thu, 19 Oct 2017 10:00:05 ESTnews427606857Modeling invasive activity: Zebra mussels' infiltration of North American riversThe invasion of nonnative species has widespread and detrimental effects on both local and global ecosystems. These intruders often spread and multiply prolifically, overtake and displace native species, alter the intended interactions between flora and fauna, and damage the environment and economy. A particularly pesky invader is the zebra mussel (Dreissena polymorpha). Given its abundancy, fecundity, and heartiness, zebra mussels frequently outcompete native bivalves. Their dominance interrupts the natural cycle of nutrients and disrupts the structure and function of infested waterworks. These so-called "ecosystem engineers" generate substantial removal costs for individuals, corporations, and towns; estimates indicate that zebra mussels cause $1 billion in damages and control costs every year.
https://phys.org/news/2017-05-invasive-zebra-mussels-infiltration-north.html
Ecology Thu, 25 May 2017 09:23:08 ESTnews414922976Mathematical model limits malaria outbreaksOne of the most common infectious diseases in the world, malaria causes public health problems and depresses the economy of infected areas. When untreated or treated improperly, the disease can result in fatalities. Despite impressive control measures and increased prevention techniques, which have reduced the global malaria mortality rate by 29% over the last six years, 3.3 billion people throughout 97 countries and territories still face a risk of infection. According to the World Health Organization, there were 212 million cases of malaria in 2015; approximately 429,000 resulted in death. Sub-Saharan Africa continues to exhibit a disproportionately high number of outbreaks and fatalities.
https://phys.org/news/2017-01-mathematical-limits-malaria-outbreaks.html
Mathematics Tue, 24 Jan 2017 09:48:36 ESTnews404473708The mathematics of coffee extraction: Searching for the ideal brewComposed of over 1,800 chemical components, coffee is one of the most widely-consumed drinks in the world. The seeds (coffee beans) from the plant of the same name are roasted and ground, allowing a flow of hot water to extract their soluble content. Undissolved solids are filtered from the dissolved particles, and the resulting liquid becomes the concoction that much of the population drinks every day.
https://phys.org/news/2016-11-mathematics-coffee-ideal-brew.html
Mathematics Tue, 15 Nov 2016 10:00:01 ESTnews398407154Equilibrium modeling increases contact lens comfortAccording to the Vision Council of America, roughly 75% of adults in the United States require some form of vision correction. Yet only 10% of Americans wear contact lenses. Studies estimate that one in four initial contact-users finds the lenses uncomfortable and stops wearing them. Thus, increasing the comfort level of contact lenses and expanding the market is a continual objective in the vision industry.
https://phys.org/news/2016-05-equilibrium-contact-lens-comfort.html
Mathematics Wed, 04 May 2016 12:33:48 ESTnews381584018Adaptive control techniques can help manage pests more effectivelyAs population growth, greater food consumption, competition for land use, and climate change pose challenges to world food production, managing loss of crop due to pests and weeds becomes increasingly important. While chemical pesticides offer effective means for control, potential loss of crop yield is still significant, as is cost. Global potential loss from pests has been estimated to be between 50% and 80% of yield based on crop type.
https://phys.org/news/2016-02-techniques-pests-effectively.html
Mathematics Tue, 09 Feb 2016 13:42:17 ESTnews374247727Improving musical synchronization with mathematical modelingMusic functions as a universal connector that pervades most cultures. More specifically, rhythm and synchronization - both within and beyond the realm of music - are forms of communication that stimulate brain activity.
https://phys.org/news/2016-01-musical-synchronization-mathematical.html
Mathematics Thu, 07 Jan 2016 12:26:40 ESTnews371391992New SIR-Network Model helps predict dengue fever epidemic in urban areasMathematics is often implemented in healthcare and medical research. From health management to the bio-pharmaceutical fields, math modeling can be used to predict the spread of diseases, how to prevent epidemics and so much more. An article 'SIR-Network Model And its Application to Dengue Fever,' authored by Lucas M. Stolerman, Daniel Coombs and Stefanella Boatto, published recently in the SIAM Journal on Applied Mathematics introduces a new mathematical model which offers a simplified approach to studying the spread of the infectious virus, Dengue fever, in urban areas, specifically breaking down the epidemic dynamics across a city and its varying neighborhoods and populations.
https://phys.org/news/2015-12-sir-network-dengue-fever-epidemic-urban.html
Mathematics Wed, 23 Dec 2015 15:27:09 ESTnews370106820Should 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.
https://phys.org/news/2015-04-political-party-coalition-voters-math.html
Mathematics Wed, 15 Apr 2015 16:34:10 ESTnews348334434When 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.
https://phys.org/news/2014-11-vaccines-imperfect-math-effects-disease.html
Mathematics Thu, 20 Nov 2014 16:00:01 ESTnews335714306Insightful 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.
https://phys.org/news/2014-10-insightful-mathematics-optimal-mathematical-equations.html
Mathematics Mon, 27 Oct 2014 10:01:43 ESTnews333622896A 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.
https://phys.org/news/2013-12-mathematical-perspective-seasonal-variations-lyme.html
Mathematics Thu, 19 Dec 2013 13:02:43 ESTnews306680533Math 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.
https://phys.org/news/2013-12-math-current-therapies-coronary-heart.html
Mathematics Mon, 09 Dec 2013 12:32:48 ESTnews305814742Are 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.
https://phys.org/news/2013-10-ready-mathematical-pension.html
Mathematics Mon, 21 Oct 2013 17:02:49 ESTnews301593725Tracking 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).
https://phys.org/news/2013-09-tracking-criminal-movement-math.html
Mathematics Thu, 12 Sep 2013 13:13:01 ESTnews298210370Using 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.
https://phys.org/news/2013-08-math-vegetation-rainfall-regions.html
Mathematics Fri, 30 Aug 2013 11:49:57 ESTnews297082184Surges 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.
https://phys.org/news/2013-05-surges-latent-infections-mathematical-analysis.html
Mathematics Fri, 31 May 2013 22:40:01 ESTnews289256900Mathematical 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.
https://phys.org/news/2013-05-mathematical-combat-hiv.html
Mathematics Fri, 31 May 2013 22:03:53 ESTnews289256625Pancakes with a side of math: A physiological model for sap exudation in maple treesFor many of us, maple syrup is an essential part of breakfast—a staple accompaniment to pancakes and waffles—but rarely do we think about the complicated and little-understood physiological aspects of syrup production. Each spring, maple growers in temperate regions around the world collect sap from sugar maple trees, which is one of the first steps in producing this delicious condiment.
https://phys.org/news/2013-03-pancakes-side-math-physiological-sap.html
Mathematics Thu, 07 Mar 2013 11:05:48 ESTnews281876730Math helps detect gang-related crime and better allocate police resources(Phys.org)—Social groups in a population can lend important cues to law enforcement officials, consumer-based services and risk assessors. Social and geographical patterns that provide information about such communities or gangs have been a popular subject for mathematical modeling.
https://phys.org/news/2013-02-math-gang-related-crime-allocate-police.html
Mathematics Thu, 14 Feb 2013 13:32:15 ESTnews280071114Math detects contamination in water distribution networksNone of us want to experience events like the Camelford water pollution incident in Cornwall, England, in the late eighties, or more recently, the Crestwood, Illinois, water contamination episode in 2009 where accidental pollution of drinking water led to heart-wrenching consequences to consumers, including brain damage, high cancer risk, and even death. In the case of such catastrophes, it is important to have a method to identify and curtail contaminations immediately to minimize impact on the public.
https://phys.org/news/2012-11-math-contamination-networks.html
Mathematics Wed, 28 Nov 2012 13:40:28 ESTnews273332411Persistence or extinction: Through a mathematical lensScientists have estimated that there are 1.7 million species of animals, plants and algae on earth, and new species continue to be discovered. Unfortunately, as new species are found, many are also disappearing, contributing to a net decrease in biodiversity. The more diversity there is in a population, the longer the ecosystem can sustain itself. Hence, biodiversity is key to ecosystem resilience.
https://phys.org/news/2012-11-persistence-extinction-mathematical-lens.html
Mathematics Mon, 12 Nov 2012 13:15:37 ESTnews271948520Toward an artificial pancreas: Math modeling and diabetes controlOctober 4, 2012—Diabetes mellitus is a chronic disease in which individuals exhibit high levels of sugar in the blood, either due to insufficient production of insulin—the hormone that allows glucose to be absorbed by body cells—or the body's lack of response to insulin. Type 1 diabetes occurs due to loss or dysfunction of β-cells of the pancreas, the organ that produces insulin. Type 2 diabetes is caused by a defective glucose-insulin regulatory system. The most common control for diabetes is by subcutaneous injection of insulin analogues through insulin pumps.
https://phys.org/news/2012-10-artificial-pancreas-math-diabetes.html
Mathematics Thu, 04 Oct 2012 13:23:05 ESTnews268575771Study proposes a mathematical model to study malaria transmissionMalaria affects over 200 million individuals every year and kills hundreds of thousands of people worldwide. The disease varies greatly from region to region in the species that cause it and in the carriers that spread it. It is easily transmitted across regions through travel and migration. This results in outbreaks of the disease even in regions that are essentially malaria-free, such as the United States. Malaria has been nearly eliminated in the U.S. since the 1950s, but the country continues to see roughly 1,500 cases a year, most of them from travelers. Hence, the movement or dispersal of populations becomes important in the study of the disease.
https://phys.org/news/2012-06-mathematical-malaria-transmission.html
Mathematics Wed, 20 Jun 2012 15:16:15 ESTnews259424086