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Joseph Mojica
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Joseph Mojica

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Ferrofluids are liquids that become magnetized when a magnetic field is applied. They're made by suspending nanoparticles (particles only a few nanometers -- tens of atoms -- across) of magnetic materials, each coated with a substance that keeps it from clumping, in an organic solvent. When magnetized, they tend to form characteristic "hedgehog" shapes.

These were originally invented for rocket fuel: the idea was to mix these directly into liquid fuel, so that a magnetic field could pull them straight into the engine. That eliminates the mechanical pumps that are at the heart of liquid-fueled rockets, which (especially then) were the #1 source of problems. Today, they're used for all sorts of other applications: for example, they're used to create hermetic seals around rotating drive shafts, like the ones in your hard disk, since if you just magnetize the shaft a bit they'll stay in place even as things spin around. Using similar tricks, they're what keep the voice coils of your speaker cool.

Basically, you can find ferrofluids anywhere that it would be really useful to hold some liquid in a strange position as if by magic. 

And here is what happens if you take a screw, apply a magnetic field to it, and pour a ferrofluid down the top. It both lubricates the screw very precisely, and looks really neat.

You can learn more at http://en.wikipedia.org/wiki/Ferrofluid .

This image comes from http://www.reddit.com/r/interestingasfuck/comments/391q8w/ferrofluid_on_a_screw/ , and via +Kimberly Chapman
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In this live Q&A session, we'll answer your questions about the upcoming mobile-friendly ranking change (http://goo.gl/WEAZcX). Post your questions to the Q&A panel or in the comments below. Several questions have already been answered at http://youtu.be/vfSFcImNFX4 so be sure to watch this helpful presentation.

Use our help forum for specific mobile issues related to your site→http://goo.gl/Pd2QAj

#MobileMadness   #mobilefriendly  
This Hangout On Air is hosted by Google Webmasters. The live video broadcast will begin soon.
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Tue, March 24, 2:00 PM
Hangouts On Air - Broadcast for free

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Stories of Women in Science & Technology, as told by women in the government that hold science and tech positions, from @USCTO's +Megan Smith  first e-mail! 

Grace Hopper, as told by the US CTO, Megan Smith
https://soundcloud.com/whitehouse/grace-hopper-as-told-by-u-s/s-47xPT

Additional stories on the same link:
*Katherine Johnson, space scientist& - commentary by NASA Chief Scientist Dr. Ellen Stofan
Rachel Carson, marine biologist - commentary from Gina McCarthy, EPA administrator
Maria Klawe, computer scientist - commentary from US CTO Megan Smith 
Lydia Villa-Kmaroff, molecular biologist - commentary from Jo Handelsman, Assoc Dir for Science in Office of Science & Technology Policy
Ada Lovelance, computer programmer #1 - commentary by US CTO Megan Smith
Sally Ride, astronaut - Commentary by NASA Chief Scientist, Dr. Ellen Stofan
Barbara McClintock, geneticist - commentary by Jo Handelsman, Assoc Dir for Science in OSTP
Listen to women from across the Administration tell the stories of their personal heroes across the fields of science, technology, engineering, and math (STEM).
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Joseph Mojica

#throughglass  - 
 
Google's Mountain View Campus  #thoughglass   

During the month of August I had the great fortune of participating in a usability study at +Google's Campus in Mountain View, California.  Here's are some photos that I took with +Google Glass during the day of the study.

The campus is in a very beautiful area of Mountain View.  Fresh air, lovely trees and wonderful views of nature are dispersed throughout the entire campus.  

After the study, I ended up finding a place to meditate underneath a tree near the campus' entrance. Needless to say, it was serene and brought new realizations to my mind. 

The idea that my feedback was somehow, to some degree, was going to direct the improvement of a service that hundreds of thousands of people use was really mind-boggling.  

I'm really glad to have helped out the department that was conducting the research; I really hope my feedback creates a much more seamless experience for the end user.

#Google   #MountainView   #throughglass  
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+Google Glass Thanks for the counsel! I'm working with a couple of native apk projects designed for glass. Pretty difficult to develop without a physical device and without the GDK but we keep on it. IMHO things like the Timeline should be like persistent notifications but with transcendental information for the user. Thanks so much, I'll keep an eye to your page!
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Best. Day. Ever.
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Joseph Mojica

Free Legal Music  - 
 
A buddy of mine +Daniel Kuark just released an original track via +Berklee College of Music's YouTube channel! Amazing stuff Dan!
===
YouTube description: Daniel Kuark performs his original song, "Nothing Has Changed," and will perform as part of Berklee College of Music's summer concert series. His free outdoor concerts will be in Kendall Square and at the ICA on August 8.

Berklee Summer in the City is sponsored by Natixis Global Asset Management. For more information visit facebook.com/summerinthecity or berklee.edu/events/summer
Video by 21summit Production - Joe Barnard 
Mastered by M Works Sudios - Jonathan Wyner
===
#upandcomingartists   #music   #berkleecollege  
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Joseph Mojica

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"mainEntityOfPage – a solution for a real life problem"

So explains +Jarno van Driel in this deep-dive into schema.org's mainEntityOfPage property, new to version 2.0.

Great stuff (and the very first guest post on SEO Skeptic too!)

#schemaorg   #mainentityofpage   #entities  
A graceful structured data solution for resolving ambiguity and search result snippet issues surrounding web pages that contain multiple top level entities.
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Quietly soft-launched the largest set of http://schema.org  improvements ever. Ssshhhh! :)

http://schema.org/docs/releases.html#v1.92

... more in Jan 2015!
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Joseph Mojica

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Paralyzed Rats Walk Again, Now Farther Than Ever
Scientists found the electrical signal frequency to make the paralyzed rats step higher and walk longer.

One of the leading cause of paralysis is spinal cord injury, which result in damaging the communication between the brain and the rest of the body -- leaving a victim unable to move some or all of his or her limbs. 

Over the past few years, scientists have begun to overcome some kinds of paralysis using epidural electrical stimulation (EES). With this technique, researchers implant two electrode arrays onto the spine: one above the injury, and one below. Then the top array reads the electrical commands from the brain and beams them to the lower array. The lower array then relays the message to the nerves that control the limbs. Essentially, the EES is a bridge that bypasses the spinal cord injury.

However, the current EES technology sends out electrical signal that never varies unless it's manually adjusted. This lack of variation causes the nerves to fatigue and eventually stop firing, and the person stops walking once again. 

Now scientists from the École Polytechnique Fédérale in Lausanne, Switzerland, have found a way to vary the electrical signals for the patients to walk longer and with greater control of their steps.

As the signal's frequency was dialed up from 20 to 90 Hertz, the rats took larger steps, ranging from 2.9 to 6.8 centimeters in height. Modulating the frequency helped the rats to walk longer: Rats whose EES continually pumped out 40 Hz signals eventually collapsed when their muscles stopped responding, whereas rats whose EES frequency varied were able to walk 1,000 steps to the end of the test -- almost double the distance of the 40 Hz rats, on average. The modulated signal may be more effective, because it mimics the diverse ways that neurons fire naturally.

The new signaling algorithm will be tested on human patients beginning as early as next summer.

via: http://goo.gl/sdtxev
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Preventing Drug Facilitated Sexual Assault with Smart Tooth Sensors

Recently a group of researchers at the National Taiwan University invented a smart tooth sensor that can "differentiate between eating, speaking, coughing, smoking, drinking, and breathing." The current state of this tooth sensor is not yet sophisticated enough to recognize whether or not the food we're eating is good for us or break the food down chemically...yet.

The idea of a smart tooth device sounds very interesting not only in the context of helping humans become healthier, brighter, more positive people but also, in the context of preventing date rape from occurring ever again.

If someone is drinking a beverage that has been exploited with Rohypnol, or some drug like it,  the smart tooth device could recognize the drug, send your cell phone and even perhaps emergency contacts or local authorities an urgent notification about it's existence in your mouth.

I imagine in the near future tooth technology will get sophisticated enough so that the latency between accurately recognizing the malicious drug and sending out the urgent notification is minimized if not instantaneously. Obviously, sooner the better so, that the perpetrator(s) are caught and no harm is done.  

===

#smarttooth   #endingviolenceagainstwomen   #wearabletechnology  
 
The prototype has an accuracy of nearly 94 percent and its learning algorithms can differentiate between eating, speaking, coughing, smoking, drinking, and breathing. 
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But then they'd still be hungry because their stomach would be empty. 
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Joseph Mojica

Alternative / Indie  - 
 
Avi Buffalo's Performance at The Wiltern Theater #throughglass  - (7/12/2013)

I recently had the good fortune of seeing +Sub Pop Records Avi Buffalo perform at The Wiltern theater in Los Angeles.  Thankfully, I had +Google Glass with me and decided to record a good portion of their set.  

I recorded the video into two segments in an effort to conserve battery life;  I wanted to make sure that I had enough battery to record the last song as it's pretty epic. The first video is of the first 19 minutes of their set. The second video is of the last song they played that night.  

This was my first attempt at recording a live performance with +Google Glass. Note to self for next time: Stand Closer!

PS: If anyone would like to make a set list that would be rad.
===
#avibuffalo     #wiltern     #throughglass   
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