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  • October 28, 2012
  • 03:56 AM

Jumping Dynamics of a Simple Robot

by Ajinkya Kamat in Brilliance Ardent

Robots fascinate all of us. While few robots are just fun toys many other robots can perform many complex tasks for us. In past decade the field of robotics has advanced by leaps and bounces making robots smarter and smarter. We have created robots, which can explore terrains- terrestrial as well as extra-terrestrial-, where even humans haven't reached. To traverse a terrain with obstacles ... Read more »

Aguilar, J., Lesov, A., Wiesenfeld, K., & Goldman, D. (2012) Lift-Off Dynamics in a Simple Jumping Robot. Physical Review Letters, 109(17). DOI: 10.1103/PhysRevLett.109.174301  

  • October 27, 2012
  • 04:49 AM

Is fMRI About To Get Fifty Times Faster?

by Neuroskeptic in Neuroskeptic

According to a paper just published, a new technique of functional MRI scanning (fMRI) could soon allow neuroscientists to measure brain activity far faster: Generalized iNverse imaging (GIN): Ultrafast fMRI with physiological noise correctionAuthors Boyacioglu and Barth claim remarkable things for the technique:We find that the spatial localization of activation for GIN is comparable to an EPI protocol and that maximum z-scores increase significantly... with a high temporal resolution of 50 milliseconds.EPI, the current standard fMRI sequence, would have a temporal resolution of 2000 or 3000 milliseconds, so it's about 50 times faster.Other super-fast fMRI methods already exist (e.g. this one I blogged about), but they've generally achieved speed only at a cost: they've had to either sacrifice spatial resolution to achieve that, or limited themselves to scanning only a small fraction of the brain, or have been more subject to random noise and hence less sensitive.GIN, however, is said to cover the whole brain, with decent spatial resolution and signal-to-noise ratio. The data can be analyzed in exactly the same way as any other kind. So that's up to fifty times faster with no real drawbacks.That would be truly revolutionary - as the major limitation of fMRI at the moment is that it's much slower than other methods of recording brain activity.Check it out: this shows brain activation in response to simple visual stimuli, imaged with bog-standard EPI and GIN:So this is a big deal... if it does work, I'm sure neuroscientists the world over will be lining up to buy Boyacioglu and Barth a GIN and tonic.How does it work, and is it all it's cracked up to be? Well, I can't really say: the math is beyond me.In essence, rather than scanning the brain in 3D, slice by slice (like this), GIN only scans one 2D slice, but then manages to reconstruct the rest of the brain in 3D from just that slice, using dark, forbidden magicks... I mean mathematics. The principle is called parallel imaging and it's been around for several years, but with image quality limitations that GIN claims to have overcome.Perhaps my more technically-inclined readers will have more insightful comments.Boyacioglu R, and Barth M (2012). Generalized iNverse imaging (GIN): Ultrafast fMRI with physiological noise correction. Magnetic Resonance in Medicine PMID: 23097342... Read more »

Boyacioglu R, & Barth M. (2012) Generalized iNverse imaging (GIN): Ultrafast fMRI with physiological noise correction. Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine. PMID: 23097342  

  • October 25, 2012
  • 10:15 PM

Ohtsuki-Nowak transform for replicator dynamics on random graphs

by Artem Kaznatcheev in Evolutionary Games Group

We have seen that the replicator equation can be a useful tool in understanding evolutionary games. We’ve already used it for a first look at perception and deception, and the cognitive cost of agency. However, the replicator equation comes with a number of inherent assumptions and limitations. The limitation Hisashi Ohtsuki and Martin Nowak wanted [...]... Read more »

Ohtsuki H, & Nowak MA. (2006) The replicator equation on graphs. Journal of Theoretical Biology, 243(1), 86-97. PMID: 16860343  

  • October 25, 2012
  • 02:53 PM

Why You Should Reject the “Rejection Improves Impact” Meme

by caseybergman in I wish you'd made me angry earlier

Over the last two weeks, a meme has been making the rounds in the scientific twittersphere that goes something like “Rejection of a scientific manuscript improves its eventual impact”.  This idea is based a recent analysis of patterns of manuscript submission reported in Science by Calcagno et al., which has been actively touted in the [...]... Read more »

  • October 24, 2012
  • 07:03 AM

Scientists Find New Method to Test Bridges’ Health: Listening to Them “Singing in the Rain”

by Jaime Menchén in United Academics

It might become the most efficient and cost-effective method to check if a bridge needs repairing: Just spray the bridge’s deck with water and record the sound. That way, according to researchers at the Brigham Young University, in the US, may be possible to detect delamination (separation of structural layers) in bridges.... Read more »

  • October 22, 2012
  • 06:24 AM

Large-N gauge theories on the lattice

by Marco Frasca in The Gauge Connection

Today I have found on arXiv a very nice review about large-N gauge theories on the lattice (see here). The authors, Biagio Lucini and Marco Panero, are well-known experts on lattice gauge theories being this their main area of investigation. This review, to appear on Physics Report, gives a nice introduction to this approach to [...]... Read more »

Biagio Lucini, & Marco Panero. (2012) SU(N) gauge theories at large N. arXiv. arXiv: 1210.4997v1

Marco Frasca. (2008) Yang-Mills Propagators and QCD. Nuclear Physics B (Proc. Suppl.) 186 (2009) 260-263. arXiv: 0807.4299v2

D. Gomez Dumm, & N. N. Scoccola. (2004) Characteristics of the chiral phase transition in nonlocal quark models. Phys.Rev. C72 (2005) 014909. arXiv: hep-ph/0410262v2

Marco Frasca. (2011) Chiral symmetry in the low-energy limit of QCD at finite temperature. Phys. Rev. C 84, 055208 (2011). arXiv: 1105.5274v4

  • October 18, 2012
  • 10:42 AM

Searching for Extraterrestrial Microbes

by Jason Carr in Wired Cosmos

Locating thermophiles in other parts of the universe could very well aid in the search for extraterrestrial life. Most people have agreed that if life is found among the stars, it will be microbial (at least in the near-term future). Many individuals have also suggested that intelligent life forms might very well be extinct in [...]... Read more »

  • October 18, 2012
  • 07:15 AM

OneZoom: Zooming in on the tree of life

by gunnardw in The Beast, the Bard and the Bot

The evolution of life is often depicted in a tree-like fashion (although, at some places, it might be more like a web). This tree analog for life’s evolution is evident in a new project to visualize the evolutionary relationships of … Continue reading →... Read more »

  • October 15, 2012
  • 10:55 AM

Using METI Satellites to Find E.T.

by Jason Carr in Wired Cosmos

Cellular networks are all the rage these days. A lot of people believe that mobile technologies will eventually replace desktops/laptops entirely. Regardless, they only work with terrestrial communications networks here on Earth. What if a similar network could be built beyond our planet? Considering that all electromagnetic radiation travels at the speed of light, the [...]... Read more »

  • October 14, 2012
  • 05:55 AM

Citizen science and digital platforms: folding it all the way to outer space

by Cobb & Hecht in Do You Believe In Dog?

ScienceRewired is a philanthropic initiative that aims to promote public engagement in science through digital and social technologies. Their mission is to aid non-technical science practitioners and the digital domain in working together, to look at science from new perspectives while helping educate and empower individuals to create significant positive change in the world. Their focus spreads across science education, science communication and citizen science initiatives – what’s not to love about that?!(source)I was fortunate to be awarded a scholarship to attend the day in Adelaide (730km / 450 miles away from home) by the Australian Science Communicators. The event was themed ‘Connect, Collaborate and Communicate for Change’ and intended to bring together science communicators, academics, media professionals and digital visionaries for a one day conference of debate, insight and education as a springboard for ongoing communication and action. We heard from a wide range of wonderful speakers about different digital/social media initiatives (most session content has been reported here), but what I wanted to share with you today were two really exciting and different projects that are underway using citizen science.(source)(source)What is Citizen Science anyway?Citizen science has been gaining momentum since the mid-1990’s, but just in case you haven’t heard the term before, relax. You already know what it is even if you haven’t heard the label. Simply put, it’s when amateur scientists or non-professionally-scientific people (i.e. general public) collaborate and help contribute to science. The internet has made this super easy.... Read more »

Hand Eric. (2010) Citizen science: People power. Nature, 466(7307), 687. DOI: 10.1038/466685a  

Khatib F., Cooper S., Tyka M. D., Xu K., Makedon I., Popovic Z., Baker D., & Players F. (2011) From the Cover: Algorithm discovery by protein folding game players. Proceedings of the National Academy of Sciences, 108(47), 18953. DOI: 10.1073/pnas.1115898108  

Parsons Jeffrey, Lukyanenko Roman, & Wiersma Yolanda. (2011) Easier citizen science is better. Nature, 471(7336), 37. DOI: 10.1038/471037a  

  • October 12, 2012
  • 05:35 AM

What's new in Music Cognition and the Cognitive Sciences?

by Henkjan Honing in Music Matters

Why should music be of interest to cognitive scientists, and what role does it play in human cognition? ... Read more »

Pearce, Marcus, & Rohrmeier, Martin. (2012) Music Cognition and the Cognitive Sciences. Topics in Cognitive Science, 4(4), 468-484. info:/10.1111/j.1756-8765.2012.01226.x

  • October 11, 2012
  • 10:14 PM

Powering electronics with stretchable batteries

by Cath in Basal Science (BS) Clarified

Potential health monitors like this one made of interlocking nanofibres are great—it’s flexible and conforms to your body. But what you don’t usually see is how these monitors might be [...]... Read more »

Abhinav M. Gaikwad, Alla M. Zamarayeva, Jamesley Rousseau, Howie Chu, Irving Derin, & Daniel A Steingart. (2012) Highly Stretchable Alkaline Batteries Based on an Embedded Conductive Fabric. Advanced Materials. DOI: 10.1002/adma.201201329  

  • October 8, 2012
  • 01:30 PM

What Types of Feedback Should Students Receive?

by Eric Horowitz in peer-reviewed by my neurons

Throughout the school day there are hundreds of small reactions, judgments, and decisions that are tossed around in a student’s head. The question is, when, where, and how can students be given additional information that nudges these thoughts in directions that will lead to better learning outcomes... Read more »

Taminiau, E.M.C., Kester, L., Corbalan, G., Alessi, S.M., Moxnes, E., Gijselaers, W.H., Kirschner, P.A., & Van Merrienboer, J.J.G. (2012) Why advice on task selection may hamper learning in on-demand education. Computer in Human Behavior. DOI: 10.1016/j.chb.2012.07.028  

  • October 5, 2012
  • 12:42 AM

Technology Is Rapidly Lowering the Cost of Testing

by Eric Horowitz in peer-reviewed by my neurons

People may view this as something for the good news/bad news file, but technology has quietly made it significantly easier to grade tests electronically. For example, a new paper in the Journal of Science Education and Technology highlights a system called “Eyegrade” : While most current solutions are based on expensive scanners, Eyegrade offers a [...]... Read more »

  • October 4, 2012
  • 03:50 PM

A Microsyringe to Take the Pain out of Shots

by Hector Munoz in Microfluidic Future

Back when I was in sixth grade, I remember reading a little blurb in some science magazine at school that in the future we could receive shots via a method that would feel as soft as a banana peel. Although I’m now a champ at taking shots, it’s still not a bad idea. We’ve had transdermal patches (think nicotine and birth control) for some time now, but those release their medicine over a period of time. A syringe is capable of delivering a dose at once, and can take a biological sample too. Researchers from the University of Pisa have developed this ‘syringe of the future’ within ‘A minimally invasive microchip for transdermal injection/sampling applications’ in Lab on a Chip.... Read more »

  • October 1, 2012
  • 01:11 PM

Does playing Solo or Vs make a Difference in Kinect or Wii? (Study)

by Stephen Yang in ExerGame Lab

If you thought yes, "you are correct Sir!" According to the current study, playing Xbox Kinect™ Reflex Ridge resulted in a 1 MET higher rating than Wii Sports Boxing, and playing multiplayer...

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... Read more »

  • October 1, 2012
  • 01:10 AM

Does playing Solo or Vs make a Difference in Kinect or Wii? (Study)

by Stephen P. Yang, Ph.D. in ExerGame Lab

According to the current study, playing Xbox Kinect™ Reflex Ridge resulted in a 1 MET higher rating than Wii Sports Boxing, and playing multiplayer yielded a 0.5 MET increase compared to solo play... Read more »

  • September 26, 2012
  • 08:50 AM

Fellows of the Wiki Society? The Royal Society in London experiments with Wikipedia

by Duncan Hull in O'Really?

Venerable and learned society experiments with wikipedia... Read more »

Wodak Shoshana J., Mietchen Daniel, Collings Andrew M., Russell Robert B., & Bourne Philip E. (2012) Topic Pages: PLoS Computational Biology Meets Wikipedia. PLoS Computational Biology, 8(3). DOI: 10.1371/journal.pcbi.1002446  

  • September 26, 2012
  • 01:38 AM

Mirror, Mirror on the wall, Am I healthy after all?

by Aurametrix team in Health Technologies

Health gadgets continue to evolve in many forms and shapes - from something that fits in your pocket to something that is wearable or walkable. Everyday objects are turning into "Smart objects", building the foundation for the next version of the Internet. And it's not all smoke and mirrors. So let's talk about mirrors. Fairy tales and science fiction stories often pave the way to real world technology. Magic mirrors have been used in Snow White and Harry Potter's world. Now you can get one, too - manufactured by a Hong Kong company James Law Cybertecture International. Cybertecture mirror can tell you about the weather or your last weight readings reported by the scales. It can show you a TV channel, let you browse Facebook or twitter and help you to exercise. Impressive, yet so much more is yet to come.Could a mirror tell us how healthy we are? For example, could it measure our heart rate at a distance? Sure, it could. And it has already been demonstrated as a concept prototype (Cardiocam, MIT media labs, Poh et al. 2010), although the designer is now focusing on mobile devices (check his company Cardiio).What other health metrics could be performed by the mirror during your regular morning hygiene routine? If a camera can measure minute changes in the color of your face to determine your heart rate, it could also measure your facial expressions and emotions or perform observational analysis  - the first of four methods of diagnosis performed by traditional Chinese medicine. Prototypes for computerized facial diagnostic systems already have been developed. One recent study, for example, (Li et al 2012) analyzes lips. The software segments lips from the rest of the face and extracts color, texture and shape features. Special supervised learning algorithms are then able to classify lips as deep-red, purple, red or pale and make inferences related to energy levels and circulation. Health management applications will not be limited to smartphones or smart homes. All objects in our lives will gradually become "smarter." Mobile phones can already manage vacuum cleaners and thermostats. Refrigerators can tweet, check Google calendars, download recipes, play tunes and alert us about food spoilage. Mirrors can monitor our weight and exercise. There is still more emphasis these days on technological wizardry than on actual benefits, but systems like Aurametrix are bringing it all together and generating valuable insights. And perhaps, one day, we won't regard the mirror on the wall nagging us about losing weight or commenting on the bags under eyes is an invasion of privacy. Let's build the future piece by piece - and they will come.REFERENCESPoh MZ, McDuff DJ, & Picard RW (2010). Non-contact, automated cardiac pulse measurements using video imaging and blind source separation. Optics express, 18 (10), 10762-74 PMID: 20588929Li F, Zhao C, Xia Z, Wang Y, Zhou X, & Li GZ (2012). Computer-assisted lip diagnosis on traditional Chinese medicine using multi-class support vector machines. BMC complementary and alternative medicine, 12 (1) PMID: 22898352Littlewort, G., Whitehill, J., Wu, T., Fasel, I.R., Frank, M., Movellan, J.R., Bartlett, M.S. (2011) The Computer Expression Recognition Toolbox (CERT). Proceedings of the 9th IEEE Conference on Automatic Face and Gesture Recognition. ... Read more »

  • September 22, 2012
  • 07:11 PM

Quantum computers | Κβαντικοί υπολογιστές

by Perikis Livas in Chilon

A research team led by Australian engineers has created the first working quantum bit based on a single atom in silicon, opening the way to ultra-powerful quantum computers of the future.

In a landmark paper published today in the journal Nature, the team describes how it was able to both read and write information using the spin, or magnetic orientation, of an electron bound to a single phosphorus atom embedded in a silicon chip.... Read more »

UNSW News, NATURE, Physics4u, Physicsgg, & Γούσια Πολυξένη. (2012) Quantum computers | Κβαντικοί υπολογιστές . Tracing Knowledge. info:/

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