Post List

Computer Science / Engineering posts

(Modify Search »)

  • November 18, 2013
  • 02:26 PM
  • 330 views

Researchers Create Better Transmitter Coils for Dynamic Wireless Charging

by dailyfusion in The Daily Fusion

Researchers from North Carolina State University have developed new technology and techniques for dynamic wireless charging moving engineers closer to their goal of creating highway “stations” that can recharge electric vehicles wirelessly as the vehicles drive by.... Read more »

  • November 3, 2013
  • 10:21 AM
  • 266 views

Tales of Neuro-Terror

by Neuroskeptic in Neuroskeptic_Discover

At this time of year, people are fond of telling scary tales – generally involving ghosts, ghouls, and other frightening creatures. Neuroscientists have their own horror stories, however – more niche, perhaps, but no less terrifying. Picture the scene: a group of PhD students are gathered around a flickering MRI console. The elder of the […]The post Tales of Neuro-Terror appeared first on Neuroskeptic.... Read more »

Gallichan D, Scholz J, Bartsch A, Behrens TE, Robson MD, & Miller KL. (2010) Addressing a systematic vibration artifact in diffusion-weighted MRI. Human brain mapping, 31(2), 193-202. PMID: 19603408  

  • October 30, 2013
  • 04:00 PM
  • 227 views

Serious Gaming, Serious Fun?

by Nura Rutten in United Academics

Serious gaming is big business. Many organizations – companies, schools, NGO’s – use games for training purposes, to engage customers, to advertise and to simulate important and critical situations. It is likely that you have been playing a game that was designed with the purpose of teaching you something, getting you to drink more milk or training your cooperative skills.

Researchers Liu, Li, and Santhanam have studied the way in which different digital games impact the behavior and emotion responses of the players. Their study addresses one key element of gaming: competition. Players seem to favor opportunities to compete with each other and games where there is a challenge. Therefore, their research attempts to analyze the influence of competition on the effort that participants put into their play and their enjoyment.... Read more »

Liu, D., Li, X., & Santhanam, R. (2013) Digital Games and Beyond: What Happens When Players Compete?. MIS Quarterly. info:/

  • October 30, 2013
  • 09:33 AM
  • 339 views

Video Tip of the Week: VectorEditor

by Mary in OpenHelix

For this week’s video tip of the week, I’ll give you a quick tour of the VectorEditor software. It’s a handy tool that you can install locally, or use on the web, to edit and display features of your DNA constructs. It’s got all of the key features that you might want–annotations, graphics, sequence, restriction […]... Read more »

  • October 29, 2013
  • 09:51 AM
  • 283 views

Hydrogel implant enables light-based communication with cells inside the body

by Perikis Livas in Tracing Knowledge

Research enables development of novel therapies based on polymer hydrogel patches that are capable of supporting living cells and guiding light.These hydrogels are used to perform in-vivo optical sensing and therapy in living mice.
This post includes the original report of the Massachusetts General Hospital, links to the Wellman Center for Photomedicine at Massachusetts General Hospital and to the Harvard’s Medical School report, the reference paper from Nature Photonics and two quite explanatory articles from Bio News Texas and Photonics Media.
___ΤΚ... Read more »

Myunghwan Choi, Jin Woo Choi, Seonghoon Kim, Sedat Nizamoglu, Sei Kwang Hahn, & Seok Hyun Yun. (2013) Light-guiding hydrogels for cell-based sensing and optogenetic synthesis in vivo. Nature Photonics. DOI: 10.1038/nphoton.2013.278  

  • October 27, 2013
  • 07:29 PM
  • 225 views

Ordinary chemical with an extraordinary property to be used in quantum computation

by Usman Paracha in SayPeople

Main Point:

Researchers have reported that a common blue pigment, copper phthalocyanine (CuPc), could be used potentially in the making of quantum computer.

Published in:

Nature

Study Further:

Copper phthalocyanine (CuPc):

It is also known as Phthalocyanine Blue BN, Monastral blue and phthalo blue. It is a semiconductor and is similar to the light harvesting part of the chlorophyll molecule.

It is commonly used in paints and dyes. It is also used in the £5 note.

It is usually resistant to alkalies and acids.

Phthalocyanine thin film on a flexible plastic substrate, showing the coexistence of long-lived "0" and "1" qubits on the copper spin (Credit: Credit: Phil Bushell, Sandrine Heutz and Gabriel Aeppli)

Quantum computing:

Quantum computing is the form of computing in which the atomic and subatomic particles do not obey the laws of classical Newtonian physics.

Most important aspect of the quantum computing is the process of “superposition” in which the electrons have the ability to remain in two states at once, i.e. qubits, instead of normal one state of the two that are “0” and “1”, i.e. classical ordinary bits.

Longer time in superposition shows the stability of quantum computing.

"In theory, a quantum computer can easily solve problems that a normal, classical, computer would not be able to answer in the lifetime of the universe. We just don't know how to build one yet,” said lead author Marc Warner from the London Centre for Nanotechnology.

Present Research:

Researchers, in the present study, have found that the electrons in CuPc can remain in superposition for significantly longer times.

“Fundamental quantities in spintronics are the population relaxation time (T1) and the phase memory time (T2): T1 measures the lifetime of a classical bit, in this case embodied by a spin oriented either parallel or antiparallel to an external magnetic field, and T2 measures the corresponding lifetime of a quantum bit, encoded in the phase of the quantum state. Here we establish that these times are surprisingly long for a common, low-cost and chemically modifiable organic semiconductor, the blue pigment copper phthalocyanine,” Researchers wrote in the paper.

"Our research shows that a common blue dye has more potential for quantum computing than many of the more exotic molecules that have been considered previously," Dr Warner said.

Moreover, CuPc is found to have other properties that could increase its potential to be used in quantum computing such as its strong ability to absorb visible light and its easy chemical and physical modification enabling scientists to control its magnetic and electrical properties.

"The properties of copper phthalocyanine make it of interest for the emerging field of quantum engineering, which seeks to exploit the quantum properties of matter to perform tasks like information processing or sensing more effectively than has ever been possible,” Dr Warner added.

References:

New material for quantum computing discovered out of the blue - Eurekalert (http://www.eurekalert.org/pub_releases/2013-10/ucl-nmf102513.php)

Marc Warner et al. (2013). Potential for spin-based information processing in a thin-film molecular semiconductor Nature DOI: 10.1038/nature12597... Read more »

  • October 27, 2013
  • 05:59 AM
  • 284 views

Philippine language relations: Reply to comments…

by nath in Imprints of Philippine Science

First, a big thanks to everybody for being engaged in what I thought was just a simple map to visualize relationships …Continue reading »... Read more »

Bouchard-Côté A, Hall D, Griffiths TL, & Klein D. (2013) Automated reconstruction of ancient languages using probabilistic models of sound change. Proceedings of the National Academy of Sciences of the United States of America, 110(11), 4224-9. PMID: 23401532  

Atkinson, Q.D. (2013) The descent of words. PNAS, 4159-4160. info:/10.1073/pnas.1300397110

  • October 25, 2013
  • 11:49 AM
  • 408 views

Researchers Study Performance of Solar Panels in Cold Climate

by dailyfusion in The Daily Fusion

Despite the obvious idea of building solar farms in sunny places, the feasibility of solar energy projects in northern climates is also being studied. Michigan Technological University’s Keweenaw Research Center (KRC) is now a part of a two-year study that aims to gauge how snow affects solar panels’ power generation and determine the best ways to overcome any losses.... Read more »

  • October 24, 2013
  • 05:58 PM
  • 364 views

Scientists Build ‘Impossible’ Silicon Supercapacitor

by dailyfusion in The Daily Fusion

Researchers at the Vanderbilt University in Nashville propose a novel silicon supercapacitor design. Such supercapacitor can be, theoretically, integrated into a silicon chip, opening some interesting options for energy storage.... Read more »

Oakes L, Westover A, Mares JW, Chatterjee S, Erwin WR, Bardhan R, Weiss SM, & Pint CL. (2013) Surface engineered porous silicon for stable, high performance electrochemical supercapacitors. Scientific Reports, 3020. PMID: 24145684  

  • October 20, 2013
  • 10:07 AM
  • 375 views

OpenCitations.net calls for help

by egonw in Chem-bla-ics

I don't think I mentioned this JISC project by David Shotton et al. yet, and should perhaps have done so earlier. But it is not too late, as Shotton is calling out for help in a Nature Comment this week (doi:10.1038/502295a). Now, I have been tracking what is citing the CDK literature using CiteUlike since 2010, and just asked the project developers how I can contribute this data.

Interestingly, the visualization from OpenCitations.net is interesting as it also shows papers citing papers that cite the CDK:




This image shows that the corpus is yet small: this CDK paper is cited more then 250 times. In the comment, Shotton writes that "[i]deally, references will come directly from publishers at the time of article publication." I do hope that publishers soon start providing APIs to extract such data. But I like to complement the call out, by inviting everyone to start annotating their old papers with this information, e.g. using CiTO and CiteULike as I did. Importantly, the authors must type their citation, something that will greatly improve the paper itself, anyway.

Now, my own use case, is to get an idea on how the CDK is used. Reason: people are not paying us, so I am limited to reports in the public that write up how they use the CDK. Direct citation is important, but I am even more interested in papers that do not cite the CDK, but cite a paper that describes a tool that depends on the CDK, like PaDEL (doi:10.1002/jcc.21707) which is cited already 73 times. Such papers are traditionally not counted as measure of the impact of the CDK, but surely are. This OpenCitations.net work, combined with CiTO allows just that.

D. Shotton (2013). Publishing: Open citations Nature, 502 (7471), 295-297 : 10.1038/502295a... Read more »

D. Shotton. (2013) Publishing: Open citations. Nature, 502(7471), 295-297. info:/10.1038/502295a

  • October 19, 2013
  • 11:30 PM
  • 332 views

Software through the lens of evolutionary biology

by Artem Kaznatcheev in Evolutionary Games Group

My preferred job title is ‘theorist’, but that is often too ambiguous in casual and non-academic conversation, so I often settle for ‘computer scientist’. Unfortunately, it seems that the overwhelming majority of people equate computer scientists to programmers or some general ‘tech person’, forgetting M.R. Fellows rallying cry: “Computer science is not about machines, in […]... Read more »

Schulte, E., Fry, Z. P., Fast, E., Weimer, W., & Forrest, S. (2013) Software Mutational Robustness. Journ. Genetic Programming and Evolvable Machines. DOI: 10.1007/s10710-013-9195-8  

  • October 19, 2013
  • 06:29 AM
  • 584 views

The Selective Clearance of Senescent Cells – a Promising Target for Ageing

by Robert Seymour in NeuroFractal

When cells are put under stress (e.g. UV light, ionising radiation, reactive oxygen species) they undergo a process known as cellular senescence in which cell division (mitosis) is arrested. This is thought to contribute to ageing. In their 2013 paper Naylor and colleagues outline a strategy to selectively remove in vivo senescent cells expressing p16Ink4A .... Read more »

  • October 16, 2013
  • 05:08 AM
  • 814 views

New insight into the Earth’s deep interior

by Perikis Livas in Tracing Knowledge

For 300 years we have known that the Earth’s magnetic field moves gradually westward. Computer simulations on the CSCS super-computer “Monte Rosa” by researchers at ETH Zurich and the University of Leeds explain why this happens.... Read more »

Livermore PW, Hollerbach R, & Jackson A. (2013) Electromagnetically driven westward drift and inner-core superrotation in Earth's core. Proceedings of the National Academy of Sciences of the United States of America, 110(40), 15914-15918. PMID: 24043841  

  • October 15, 2013
  • 08:00 AM
  • 244 views

Philippine language relations in a map

by nath in Imprints of Philippine Science

“The number of individual languages listed for Philippines is 185. Of these, 181 are living and 4 are extinct. Of …Continue reading »... Read more »

Bouchard-Côté A, Hall D, Griffiths TL, & Klein D. (2013) Automated reconstruction of ancient languages using probabilistic models of sound change. Proceedings of the National Academy of Sciences of the United States of America, 110(11), 4224-9. PMID: 23401532  

  • October 13, 2013
  • 11:45 PM
  • 396 views

Mathematics in finance and hiding lies in complexity

by Artem Kaznatcheev in Evolutionary Games Group

Mathematics has a deep and rich history, extending well beyond the 16th century start of the scientific revolution. Much like literature, mathematics has a timeless quality; although its trends wax and wane, no part of it becomes out-dated or wrong. What Diophantus of Alexandria wrote on solving algebraic equations in the 3rd century was still […]... Read more »

  • October 12, 2013
  • 05:24 PM
  • 349 views

Stochastic Optimization in R by Parallel Tempering

by Lindon in Lindon's Log

I’ve written a few posts now about using parallel tempering to sample from complicated multi-modal target distributions but there are also other benefits and uses to this algorithm. There is a nice post on Darren Wilkinson’s blog about using tempered posteriors for marginal likelihood calculations. There is also another area where parallel tempering finds application, […]The post Stochastic Optimization in R by Parallel Tempering appeared first on Lindons Log.... Read more »

Li Yaohang, Protopopescu Vladimir A., Arnold Nikita, Zhang Xinyu, & Gorin Andrey. (2009) Hybrid parallel tempering and simulated annealing method. Applied Mathematics and Computation, 212(1), 216-228. DOI: 10.1016/j.amc.2009.02.023  

  • October 11, 2013
  • 08:44 AM
  • 300 views

Bone-Crack Detection, Targeting, and Repair Using Ion Gradients

by Perikis Livas in Tracing Knowledge

Bone cracks can be detected by utilizing the damaged matrix itself as both the trigger and the fuel. A crack in a material with a high mineral content such as bone generates ion gradients, which can be utilized for active targeting and treatment. This approach to targeting a biological structure augments current methods, which are focused on biomacromolecular interactions involving proteins and nucleic acids.... Read more »

Yadav V, Freedman JD, Grinstaff M, & Sen A. (2013) Bone-Crack Detection, Targeting, and Repair Using Ion Gradients. Angewandte Chemie (International ed. in English). PMID: 24039057  

  • October 10, 2013
  • 07:33 AM
  • 230 views

3-D Printing Good For The Environment

by Qdragon in United Academics

Have you always wanted a 3-D printer but never really had a justification for the investment? Well, a study done by Michigan technological University has your back. It shows that in many cases 3-D printing products are more environmentally friendly than mass production.... Read more »

Christian Baechler, Matthew DeVuono, Joshua M. Pearce. (2013) Distributed recycling of waste polymer into RepRap feedstock. Rapid Prototyping Journal. DOI: 10.1108/13552541311302978  

  • October 10, 2013
  • 04:30 AM
  • 365 views

Computational complexity of evolutionary stable strategies

by Artem Kaznatcheev in Evolutionary Games Group

Yesterday, I shared a video of John Maynard Smith introducing evolutionary game theory (EGT) to the London Mathematical Society. I suggested that at its foundation, EGT was just like classical game theory, and based on equilibrium analysis — the evolutionary stable strategy (Maynard Smith & Price, 1973). Given a utility function that gives the expected […]... Read more »

Conitzer, V. (2013) The exact computational complexity of evolutionarily stable strategies. The 9th Conference on Web and Internet Economics (WINE). info:/

  • October 9, 2013
  • 10:43 AM
  • 567 views

Honeybees Can Avoid Deadlock When Making Group Decisions, So Why Can't We?

by Miss Behavior in The Scorpion and the Frog

This honeybee swarm has precious little time to make a democratic decision as to where they will move to. A decision deadlock could have fatal consequences. Image by Nino Barbieri at Wikimedia Commons.In case you've been living in a cave lately, the U.S. Government has been shut down since October 1st. Not because of a terrorist attack or a bank system meltdown or a natural disaster, but because Congress cannot agree on a spending bill to determine our government's funding plan for the next year. The government shutdown has its consequences (such as closed national parks, postponed federal research funding, the halting of the CDC's flu vaccine program, and unpaid federal employees), but these will seem like a slap on the wrist if Congress can't agree to raise the debt ceiling by October 17. If we are still in a government deadlock at that point, we will default on our national loans and suffer disastrous consequences (such as the devaluation of the dollar, social security payments not being made, spiking interest rates, and devaluation and forced selling off of bonds). Congress is up against a deadline to make a group decision, and the consequences of not making one in time are much higher than the consequences of making an inperfect one. It's hard to come to a consensus when so many individuals in the group have a strong opinion one way or another, but the fact of the matter is: honeybees can do it. So why can't we? This week at Accumulating Glitches I tell the story of how honeybees democratically decide on what new home to move to, all while avoiding a deadlock at indecision. Check it out here.And to learn more, check these out: Seeley, T.D., Visscher, P.K., Schlegel, T., Hogan, P.M., Franks, N.R., & Marshall, J.A.R. (2012). Stop signals provide cross inhibition in collective decision-making by honeybee swarms Science, 335, 108-111 DOI: 10.1126/science.1210361Seeley, T.D. Honeybee Democracy, Princeton University Press (2010). And learn more about group decision-making in animals at Can a Horde of Idiots Be a Genius? and Why This Horde of Idiots Is No Genius ... Read more »

join us!

Do you write about peer-reviewed research in your blog? Use ResearchBlogging.org to make it easy for your readers — and others from around the world — to find your serious posts about academic research.

If you don't have a blog, you can still use our site to learn about fascinating developments in cutting-edge research from around the world.

Register Now

Research Blogging is powered by SMG Technology.

To learn more, visit seedmediagroup.com.