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Duane Sharrock

Medical devices powered by the ear itself - MIT News Office - 1 views

www.mit.edu/...biological-battery-1107.html

medical devices powered ear mit news battery

shared by Duane Sharrock on 09 Nov 12 - No Cached
  • Health Sciences and Technology (HST) demonstrate for the first time that this battery could power implantable electronic devices without impairing hearing.
  • The devices could monitor biological activity in the ears of people with hearing or balance impairments, or responses to therapies. Eventually, they might even deliver therapies themselves
  • “In the past, people have thought that the space where the high potential is located is inaccessible for implantable devices, because potentially it’s very dangerous if you encroach on it,” Stankovic says. “We have known for 60 years that this battery exists and that it’s really important for normal hearing, but nobody has attempted to use this battery to power useful electronics.”
  • ...5 more annotations...
  • The ear converts a mechanical force — the vibration of the eardrum — into an electrochemical signal that can be processed by the brain; the biological battery is the source of that signal’s current. Located in the part of the ear called the cochlea, the battery chamber is divided by a membrane, some of whose cells are specialized to pump ions. An imbalance of potassium and sodium ions on opposite sides of the membrane, together with the particular arrangement of the pumps, creates an electrical voltage.
  • Low-power chips, however, are precisely the area of expertise of Anantha Chandrakasan’s group at MTL
  • The frequency of the signal was thus itself an indication of the electrochemical properties of the inner ear.
  • in cochlear implants, diagnostics and implantable hearing aids. “The fact that you can generate the power for a low voltage from the cochlea itself raises the possibility of using that as a power source to drive a cochlear implant,” Megerian says. “Imagine if we were able to measure that voltage in various disease states. There would potentially be a diagnostic algorithm for aberrations in that electrical output.”
  • “I’m not ready to say that the present iteration of this technology is ready,” Megerian cautions. But he adds that, “If we could tap into the natural power source of the cochlea, it could potentially be a driver behind the amplification technology of the future.”
  • Duane Sharrock on 09 Nov 12
     
    "For the first time, researchers power an implantable electronic device using an electrical potential - a natural battery - deep in the inner ear."
  • Duane Sharrock on 09 Nov 12
     
    "All of D-Lab's classes assess the needs of people in less-privileged communities around the world, examining innovations in technology, education or communications that might address those needs. The classes then seek ways to spread word of these solutions - and in some cases, to spur the creation of organizations to help disseminate them. Specific projects have focused on improved wheelchairs and prosthetics; water and sanitation systems; and recycling waste to produce useful products, including charcoal fuel made from agricultural waste."
Cara Whitehead

Educational Standards Correlations - 10 views

www.spellingcity.com/al-standards-correlations.html

common core spelling vocabulary standards

shared by Cara Whitehead on 02 Jun 13 - No Cached
  • Cara Whitehead on 02 Jun 13
     
    VocabularySpellingCity provides the following sets of correlations to standards: U.S. Standards by State Common Core Standards for each States' Implementation Australian Standards by State Canadian Standards by Province English National Curriculum Standards
Cara Whitehead

Summer Program - 3 views

www.spellingcity.com/summer.html

spelling vocabulary vocabularyspellingcity SpellingCity online games

shared by Cara Whitehead on 12 May 13 - No Cached
  • Cara Whitehead on 12 May 13
     
    VocabularySpellingCity has a new summer word study program that allows children to sharpen academic skills as they play. These simple assignments are a daily workout for the brain, building literacy skills such as vocabulary, spelling, and writing.
LUCIAN DUMA

Top 16 tools and apps in #leweb13 #startup competition - 14 views

teacherluciandumaweb20.blogspot.ro/...and-apps-in-leweb-startup.html

lewb

shared by LUCIAN DUMA on 10 Jun 13 - No Cached
  • LUCIAN DUMA on 10 Jun 13
     
    In case you missed #leweb
LUCIAN DUMA

Top 10 web tools #googlereader alternative to save favorite blogs - 4 views

teacherluciandumaweb20.blogspot.ro/...10-web-tools-googlereader.html

eltchat elearning googlereader via:packrati.us edchat roedchat ntchat cpchat

shared by LUCIAN DUMA on 13 Jun 13 - No Cached
  • LUCIAN DUMA on 13 Jun 13
     
    I also work to a list Top 100 google reader alternative where everyone can propose new tools / apss who can replace google reader for web / ipad and I will share this list on my blog in 2 weeks http://list.ly/list/5Kl-top-100-web-tools-ipad-apps-who-can-replace-googlereader-follow-web20education .
Cara Whitehead

What's New? - 7 views

www.spellingcity.com/whats-new.html

shared by Cara Whitehead on 23 Dec 12 - No Cached
  • Cara Whitehead on 23 Dec 12
     
    Two New Free Games! Just in time for the Holiday Season - two brand new games! Test-N-Teach (TNT) is our new spelling game and Read-A-Word is our first-ever reading game. Both games are available to everyone!
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