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Alpine Algenart neu positioniert

By Guest PostOctober 24, 2014Sciencebau kunst erfinden, crawler, drop of blood, dyscrete, fassaden roboter, forschungsplattform, heike klussmann, mining energy, newomics inc, plotbot, screening for disease, solarstrom beton, uni innsbruck, university of connecticut, uv strahlung

Algen sind das Spezialgebiet des Innsbrucker Botanikers Andreas Holzinger. Im Rotmoostal in Obergurgl stieß er auf eine besondere Art, die er nun gemeinsam mit KollegInnen aus Innsbruck und den USA detailliert untersuchte. Die Fachzeitschrift Journal of Phycology widmete dieser Beschreibung im Oktober ihre Coverseite.

Zygogonium ericetorum – diese alpine Algenart gab Andreas Holzinger einige Rätsel auf. „Ich habe diese Art im Obergurgler Rotmoostal gefunden. Sie gehört in die Großgruppe der streptophytischen Grünalgen, ist teilweise austrocknungstolerant und aufgrund ihrer starken lila-Färbung sehr resistent gegenüber UV-Strahlung“, beschreibt assoz. Prof. Dr. Andreas Holzinger vom Institut für Botanik der Uni Innsbruck. Die Lila-Färbung dieser Art ist dadurch bedingt, dass die Algen einen eisenhaltigen Farbstoff in die Vakuole einlagern. „Diese Färbung ermöglicht eine höhere UV-Absorption, wodurch besonders die Photosynthese betreibenden Chloroplasten sehr gut geschützt sind und ein Überleben der Art in exponierten Höhenlagen sichern“, so Holzinger. (more…)

Maths predicts rise and fall of empires

By Guest PostOctober 5, 2013General, Scienceafrica, americas, ancient empires, asia, cavalry, chariots, computer model, empires, Europe, evolution, evolutionary driver, fall, grid cell, human history, math, mathematical model, mathematical simulation, military innovation, old world, predict, predict the future, quantitative accuracy, rise, sergey gavrilets, simulate warfare, socio cultural evolution, tom currie, university of connecticut, university of exeter

Researchers have developed a new mathematical model that accurately describes the evolution of ancient empires.

The computer model can predict with 65% accuracy where and when the largest complex societies arose in human history.

The research, which suggests that intense warfare is the evolutionary driver of large complex societies, is published in the journal Proceedings of the National Academy of Sciences (PNAS). It was carried out by researchers from the University of Exeter in collaboration with University of Connecticut and the National Institute for Mathematical and Biological Synthesis (NIMBioS) in the US. (more…)

New Twist on Ancient Math Problem Could Improve Medicine, Microelectronics

By Guest PostMay 15, 2012Scienceancient math problem, carolyn phillips, filling problem, hidden facet, medicine, microelectronics, microprocessor, Nanotechnology, pentagon, protein, radiation beam, sanskrit manuscript, sharon glotzer, silicon chip, solution, starfish, three dimensions, traps, treating tumor, two dimensions, university of connecticut, university of michigan

ANN ARBOR, Mich.— A hidden facet of a math problem that goes back to timeworn Sanskrit manuscripts has just been exposed by nanotechnology researchers at the University of Michigan and the University of Connecticut.

It turns out we’ve been missing a version of the famous “packing problem,” and its new guise could have implications for cancer treatment, secure wireless networks, microelectronics and demolitions, the researchers say.

Called the “filling problem,” it seeks the best way to cover the inside of an object with a particular shape, such as filling a triangle with discs of varying sizes. Unlike the traditional packing problem, the discs can overlap. It also differs from the “covering problem” because the discs can’t extend beyond the triangle’s boundaries. (more…)

Study: Delays in Video Calls May Not Always Hurt Communication

By Guest PostOctober 12, 2011Technologychristian rauh, computer users, modern technology, negative emotions, ohio state university, personal communication, political topics, ross buck, stacie renfro powers, tessa vest, university of connecticut, us presidential election, video, video calls, video connection, video technology, war in iraq

COLUMBUS, Ohio – A new study reveals how the delay computer users sometimes experience when making video calls over the internet can actually help communication in some circumstances, even though it is frustrating in many others.

Researchers found that when two strangers first talked about an emotionally charged topic over a video connection with a one-second delay, they actually reported less frustration than did those who talked with no delay. (more…)

Tag Archives: university of connecticut

Alpine Algenart neu positioniert

Maths predicts rise and fall of empires

New Twist on Ancient Math Problem Could Improve Medicine, Microelectronics

Study: Delays in Video Calls May Not Always Hurt Communication