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Life Sciences - Mathematics - 17.05.2010
Flower Organ's Cells Make Random Decisions that Determine Size
Flower Organ’s Cells Make Random Decisions that Determine Size
PASADENA, Calif.—The sepals of the plant Arabidopsis thaliana —commonly known as the mouse-eared cress—are characterized by an outer layer of cells that vary widely in their sizes, and are distributed in equally varied patterns and proportions. Scientists have long wondered how the plant regulates cell division to create these patterns—in other words, how it decides which and how many cells will be large, which slightly smaller, and which very small.

Life Sciences - Mathematics - 17.05.2010
Decoding network communities
Decoding network communities
A new way of finding community structure within networks - anything from social networks such as Facebook, to transport networks, political voting networks, and protein interaction networks in biology - could help us understand how people are connected and how connections change over time. The new technique, developed by a team from the University of North Carolina, University of Oxford, and Harvard University, aims to be more realistic than conventional approaches, which only capture one type of connection or a network at only one moment in time.

Physics - Mathematics - 11.05.2010
Researchers find a way to calculate the effects of Casimir forces
Researchers find a way to calculate the effects of Casimir forces
New computational techniques developed at MIT confirmed that the complex quantum effects known as Casimir forces would cause tiny objects with the shapes shown here to repel each other rather than attract. CAMBRIDGE, Mass. ? MIT researchers have developed a powerful new tool for calculating the effects of Casimir forces, complicated quantum forces that affect only objects that are very, very close together, with ramifications for both basic physics and the design of microelectromechanical systems (MEMS).

Mathematics - Chemistry - 23.04.2010
New computational method to uncover gene regulation
Scientists have developed a new computational model to uncover gene regulation, the key to how our body develops – and how it can go wrong. The researchers, from The University of Manchester (UK), Aalto University (Finland) and the European Molecular Biology Laboratory Heidelberg (Germany), say the new method identifies targets of regulator genes.

Physics - Mathematics - 02.03.2010
Mega-tsunami hits House of Commons
Mega-tsunami hits House of Commons
A breakthrough discovery by experts at the University of Sheffield, which sheds light on mega-tsunamis on the Sun, is set to be revealed at the House of Commons next week (Monday 8 March 2010). Solar physicists from the University will discuss their discovery of solar Transition Region Quakes to an audience of MPs both from the House of Commons and the House of Lords at the House of Commons Marquee, after being selected by the Parliamentary and Scientific Committee.

Physics - Mathematics - 25.02.2010
Scientists find an equation for materials innovation
Scientists find an equation for materials innovation
Princeton engineers have made a breakthrough in an 80-year-old quandary in quantum physics, paving the way for the development of new materials that could make electronic devices smaller and cars more energy efficient. By reworking a theory first proposed by physicists in the 1920s, the researchers discovered a new way to predict important characteristics of a new material before it's been created.

Physics - Mathematics - 23.02.2010
Seven awarded Sloan Research Fellowships
Seven Princeton scientists have been selected to receive 2010 Sloan Research Fellowships, highly competitive grants given to outstanding scholars who are conducting research at the frontiers of their fields. They are among 118 scientists, mathematicians, engineers and economists chosen for the award from 61 colleges and universities in the United States and Canada.

Life Sciences - Mathematics - 22.02.2010
Simple math explains dramatic beak shape variation in Darwin’s finches
Cambridge, Mass. February 22, 2010 - From how massive humpbacks glide through the sea with ease to the efficient way fungal spores fly, applied mathematicians at Harvard have excavated the equations behind a variety of complex phenomena. The latest numerical feat by Otger Campàs and Michael Brenner, working closely with a team of Harvard evolutionary biologists led by Arhat Abzhanov, zeroes in on perhaps the most famous icon of evolution: the beaks of Darwin’s finches.

Mathematics - Computer Science - 13.01.2010
New record in the area of prime number decomposition of cryptographically important numbers
New record in the area of prime number decomposition of cryptographically important numbers
An international team of scientistshas obtained the prime factors of the RSA challenge number RSA-768, using the Number Field Sieve.

Health - Mathematics - 06.01.2010
Study finds H1N1 virus spreads easily by plane
Viruses love plane travel. They get to fly around the world inside a closed container while their infected carrier breathes and coughs, spreading pathogens to other passengers, either by direct contact or through the air. And once people deplane, the virus can spread to other geographical areas. Scientists already know that smallpox, measles, tuberculosis, seasonal influenza and severe acute respiratory syndrome (SARS) can be transmitted during commercial flights.

Mathematics - Life Sciences - 24.11.2009
The Cause Behind the Characteristic Shape of a Long Leaf Revealed
Cambridge, Mass. November 24, 2009 - Applied mathematicians dissected the morphology of the plantain lily (Hosta lancifolia), a characteristic long leaf with a saddle-like arc midsection and closely packed ripples along the edges. The simple cause of the lily's fan-like shape - elastic relaxation resulting from bending during differential growth - was revealed by using an equally simple technique, stretching foam ribbons.

Physics - Mathematics - 15.11.2009
One of the largest-ever computer models explores "turbulent flames" as they occur in early stages of a supernova
Scientists use the Roadrunner supercomputer to model a fundamental process in physics that could help explain how stars begin to explode into supernovae Los Alamos, New Mexico, November 16, 2009 — Despite decades of research, understanding turbulence, the seemingly random motion of fluid flows, remains one of the major unsolved problems in physics.

Physics - Mathematics - 05.11.2009
Rapid supernova could be new class of exploding star
Rapid supernova could be new class of exploding star
BERKELEY — An unusual supernova rediscovered in seven-year-old data may be the first example of a new type of exploding star, possibly from a binary star system where helium flows from one white dwarf onto another and detonates in a thermonuclear explosion. Artist's impression of an AM-CVn star system, where helium flows from one star, a helium white dwarf (upper right), onto another, piling up in an accretion disk around a small, dense primary star.

Physics - Mathematics - 07.05.2009
Refined Hubble Constant Narrows Possible Explanations For Dark Energy
Office of News and Information Johns Hopkins University 901 South Bond Street, Suite 540 Baltimore, Maryland 21231 Phone: 443-287-9960 Fax: 443-287-9920 May 7, 2009 FOR IMMEDIATE RELEASE JH Media Contact: Lisa De Nike 443-287-9960, Lde [a] jhu (p) edu Space Telescope Science Institute Contact: Ray Villard 410-338-4514, villard [a] stsci (p) edu Whatever dark energy is, explanations for it have less wiggle room following a Hubble Space Telescope observation that has refined the measurement of the universe's present expansion rate to a precision where the error is smaller than five percent.

Mathematics - Life Sciences - 31.03.2009
Computer simulations explain the limitations of working memory
Researchers at Karolinska Institutet (KI) have constructed a mathematical activity model of the brain´s frontal and parietal parts, to increase the understanding of the capacity of the working memory and of how the billions of neurons in the brain interact. One of the findings they have made with this "model brain" is a mechanism in the brain´s neuronal network that restricts the number of items we can normally store in our working memories at any one time to around two to seven.
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