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Submission + - 3D Printed Sugar Templates for Living Vascular Tissues (hive76.org)

jmil writes: Our paper was just published in Nature Materials where we created 3D printed sugar templates on a modified RepRap. The sugar becomes a sacrificial template for rapidly casting vasculature to provide nutrients and oxygen to entrapped living cells. We showed that blood vessel cells formed capillary sprouts extending from our vasculature and that the vasculature sustained the metabolic function of primary liver cells. We see this technology as an important step along the path to creating functional tissue and organ replacements for human patients.

Submission + - LinkedIn is selling your clicks AND violating their own Privacy Policy (hive76.org)

jmil writes: LinkedIn is selling your clicks and violating its own privacy policy.

As advertising for the LinkedIn Premium for-pay Service called "LinkedInPro" they advertise a feature:
"Who's Viewed Your Profile: Get the full list
Get the complete list of who's viewed your profile with Profile Stats Pro. You'll also see how your viewers found you, and learn more about the people interested in you."

This is a feature of their all of their Business, Business Plus, and Executive for-pay services, which range from $24.99-$99.95 per month.

Besides a clear invasion of privacy, this is also directly in opposition to their own privacy policy:
"We do not sell, rent, or otherwise provide personally identifiable information to third parties without your consent except where it is necessary to carry out your instructions (to process your payment information, for example) or as described in Section 2 of this Privacy Policy. Also, we may share information with affiliates (like LinkedIn Ireland, Limited) to provide the Services. We also provide you with the means to control whether or not your contact information is viewable to other Users through your profile."

That means LinkedIn is both actively tracking everything you click on specifically as a means to be sold as personally identifiable information to other users of the site, while at the same time promising not to do so.

At this point all you can do is deactivate your LinkedIn account (UnLinked?) since their customer service does not respond to inquiries. What a crock.


Comcast Intercepts and Redirects Port 53 Traffic 527

An anonymous reader writes "An interesting (and profane) writeup of one frustrated user's discovery that Comcast is actually intercepting DNS requests bound for non-Comcast DNS servers and redirecting them to their own servers. I had obviously heard of the DNS hijacking for nonexistent domains, but I had no idea they'd actually prevent people from directly contacting their own DNS servers." If true, this is a pretty serious escalation in the Net Neutrality wars. Someone using Comcast, please replicate the simple experiment spelled out in the article and confirm or deny the truth of it. Also, it would be useful if someone using Comcast ran the ICSI Netalyzr and posted the resulting permalink in the comments.

Solar Plane Breaks Endurance Record 134

calmond writes with this excellent snippet from CNET News: "QinetiQ Group PLC claimed Sunday that its propeller-driven aircraft called Zephyr flew for 83 hours and 37 minutes non stop, more than doubling the official world record set by Northrop Grumman's Global Hawk in 2001. The Zephyr is much different from the Global Hawk, which is about the size of a fighter and requires runway for taking off and landing. Zephyr, on the other hand, is an ultra-lightweight carbon-fiber aircraft that weighs less than 70lbs and is designed to launch by hand. The little aircraft flies on solar power generated by amorphous silicon arrays covering the aircraft's paper-thin wings. It is powered day and night by rechargeable lithium-sulfur batteries that are recharged during the day using solar power."

Comment Re:Not necessarily (Score 3, Insightful) 122

There is a problem with silicon-based life. Silicon is not as nearly versatile chemically as carbon is. It is highly doubtful silicon can sustain any meaningful biochemistry -at least, not by itself

These statements are all true... on Earth. Plenty of reactive silanes are possible. All known biochemistry is based on carbon, so of course silicon is not going to catalyze many biochemical reactions. But carbon-based reactions do not go so efficiently in the cold... Iron chemistries might have gone wild on Mars. Why not metal-based life (lots of metals form strong alloys)?

Carbon itself is highly unreactive. This is why pencils and diamond rings are allowed on airplanes. It needs bonded groups such as amines, hydroxyls, thiols, etc. to get any meaningful work done. Carbon is just the backbone.

We simply haven't tried every possible chemical reaction in all possible environmental conditions to know which reactions might be "spontaneous" on other planets. We can sure try and guess. However, chemists are surprised every day by reaction kinetics, behaviors, and mechanisms here on Earth. We still don't understand chemistry that well. So why do we need to stifle ideas of how things might evolve on other planets with vastly different experimental conditions?

We should be looking closer at Venus instead... it's nearby, lots of strong chemicals and lots of heat make for an intriguing place for reactions to take place. Moving far away from the Sun is misguided if we're looking for interesting chemistry...

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