DIY nanotechnology: Make magnetite nanocrystals!

By Matt Mets, MAKEMay 07, 2010 at 02:00PM

Magnetite_Nanocrystals.jpg

The folks over at OSnano are working to make nanotechnology to the home laboratory. Their first project is a guide to fabricating your own Magnetite Nanocrystals:

Why? Magnetite Nanocrystals are good for removing arsenic from water. Based on recent advances in nanotechnology, it’s now possible to make regular magnetite nanocrystals as small as 20-100nm, and to remove them from solution using a handheld magnet. Arsenic poisoning is a huge problem in Southeast Asia, especially in Bangladesh, and in various other parts of the world. Our project opens up the process for making magnetite and encourages you to experiment with it, contribute to it, and improve it.

Looks pretty excellent, however it requires a TEM to verify the results. Anyone have a homebrew one of those (it should be totally possible…)? [thanks, Heath!]

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BootTimer – Objectively Measure Your Windows XP Boot Time

By Justin Pot, MakeUseOfMay 06, 2010 at 05:31PM

measured boot timesNo one likes a slow computer; that’s why we offer so many guides to speeding it up here. Angelina showed you 8 programs that can make your computer run faster and Karl taught you about getting your startup programs under control with Autoruns. Autoruns is a particularly effective tool if you’re looking to increase your boot time.

You can run all these programs and you’ll probably notice the difference, but how can you be objectively sure they’re making a difference? For most people the general feel of quickness is enough to justify the effort, but if you’re looking for scientific evidence of speediness a lot of people like take a look at their measured boot times; that is, the time it takes from switching the computer on to having a usable desktop.


And if you want to measure your boot time on a Windows XP machine, you should really check out BootTimer. This portable application does one thing and does it well: measure how long it takes to boot. If you’re looking for scientific evidence that what you’re doing is speeding up your boot it’s really worth a look.

Note: this application does not work on Windows Vista or 7 at this time.

The Process

So, first thing first: download BootTimer over at Planetsoft or if you prefer, at Download.com. You’ll have a single executable file to work with; BootTimer is a portable application and is perfect for throwing onto the thumb drive that contains your geeky arsenal.

When you’re ready to restart your computer, go ahead and open BootTimer. You’ll see this message:

measured boot times

Click “Yes” and your computer will restart. Nothing unusual about that, right? When it gets into Windows you’ll be told not to touch your mouse or keyboard, so don’t; BootTimer is waiting until your desktop is usable to finish timing. When it is you’ll receive a notice like this, containing the information you’re looking for:

measured boot times

Wasn’t that easy? Be sure to write this time down.

Self-Cleaning

Want to remove every trace that this program ever ran? No problem. Just click “OK” and the program will go about removing itself completely from your system.

There’s one catch: BootTimer will open up its webpage and encourage you to click an ad. This is annoying, but considering how useful the program is and that it’s free I suppose it’s a harmless way to support the app.

How It Works

BootTimer doesn’t install a stopwatch on your machine and time everything; rather it check the various logs the Windows system creates in order to judge when Windows started booting and when it finished.

So why not use a standard stopwatch to determine your measured boot times? You could, but it wouldn’t necessarily be standardized in terms of when the time begins and end. Use this program and the results will be comparable.

Conclusion

Here’s how I suggest you use this program: before you go about speeding up your computer, run the program once. This will give you the slow rate to compare your end results with. Go ahead and do your usual speed-up routine. Once you’re done, go ahead and run a second test. This will give you empirical evidence that what you’re doing to speed up your machine is useful.

What do you think? Is measuring your boot time useful at all, or is it just a useless measurement geeks use so they can brag about something? Could you see yourself using a tool like this? Or do you have an alternative tool to recommend? The Internet is in need of more content, so please do your part by speaking your mind below.

Image Credit: Casey Marshall

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Omek Interactive Could Blow Microsoft’s Project Natal Out Of The Water (Video)

By Robin Wauters, TechCrunchMay 06, 2010 at 01:31PM

I’ve spent 4 full days here in Israel meeting tons of entrepreneurs and startup folks, but if I had to pick one company that made the biggest impression on me it would definitely be Omek Interactive.

The company, which unveiled itself to the public for the first time at the Techonomy 2010 conference held in Tel Aviv earlier this week, was co-founded by a couple over 3.5 years ago. Nevertheless, chances are you’ve never heard that name before.

Chances are you’ve heard of Microsoft’s Project Natal though, the fascinating controller-free gaming and entertainment product Microsoft showcased at E3 2009 in June 2009 and is reportedly set to make its genuine debut at the end of this year.

Well, Omek is a tiny startup that aims to take on the Redmond software giant, their product is ready for market today, and they’re only now starting to talk to press about their well thought-out strategy and demoing their amazing technology.

I was lucky enough to be here in Israel now that the company is finally coming out of the woodworks, so I headed down to their offices near Jerusalem to interview co-founder and CEO Janine Kutliroff (a very impressive woman, to say the least) and record some demos.

In short: they’re developing technology that is nothing short of groundbreaking, and has the potential to change the way we interact with on-screen games and applications. Minority Report-style interactions are much closer to reality than most people think, as you’ll see.

I’ll let you watch the video interview to get an idea of Omek Interactive’s vision (hint: being platform-agnostic and as open to third-party developers as possible is something they’re betting the farm on), and to see the technology in action – the actual demos start around the 6:25 minute mark if you feel like skipping the conversation.

Microsoft, take note. Venture capitalists, you too.

Update: here’s a bonus video, made by Robert Scoble at the Techonomy event:

Robust Key Generation from Singnal Envelopes in Wireless Networks for Secure Communication

By Mansoor Khan, University of Connecticut, iBridge Network InnovationsMay 05, 2010 at 11:14PM

This technology relates to providing secure communications in ad-hoc wireless communication systems.

The broadcast nature of a wireless link provides a natural eavesdropping and intervention capability to an adversary. Thus, securing a wireless link is essential to the security of a wireless network, and key generation algorithms are necessary for securing wireless links.

However, traditional key agreement algorithms can be very costly in many settings, e.g. in wireless ad-hoc networks, since they consume scarce resources such as bandwidth and battery power.

This invention presents a novel approach that couples the physical layer characteristics of wireless networks with key generation algorithms. It is based on the wireless communication phenomenon known as the principle of reciprocity which states that in the absence of interference both transmitter and receiver
experience the same signal envelope.

The key-observation here is that the signal envelope information can provide to the two transceivers two correlated random sources that provide sufficient amounts of entropy which can be used to extract a cryptographic key.

In contrast, it is virtually impossible for a third party, which is not located at one of the transceiver’s position, to obtain or predict the exact envelope; thus retrieve the key.

Since in the presence of interference strict reciprocity property
can not be maintained; our methodology is based on detecting deep fades to extract correlated bitstrings.

In particular, we show how a pair of transceivers can reconcile such bitstrings and finally flatten their distribution to reach key agreement.

How-To: Simple workbench

By Becky Stern, MAKEMay 05, 2010 at 03:30PM

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Randy Sarafan writes:

A few weeks ago I got tired of being hunched behind a desk all day. I was already surrounded by all kinds of alternative desks, so I decided to throw my hat into the ring. I’ve been in situations in the past at which I’ve worked at workbenches or work counters and always found these experiences highly enjoyable. I prefer to have the option to stand while I work and like having lots of space to spread out my stuff and move around. So, I recently got rid of my desk and replaced it with two rolling workbenches.

More:

How-To: Treadmill desk

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Han Shot First

By (author unknown), Daddy TypesMay 05, 2010 at 09:47AM

preg_star_wars_jjhays.jpg

I am thrilled for Jennifer and Jeff, and I’m glad they’re using the last few months of their blissfully undisturbed, kid-free time to create such epic pregnancy announcements. It tactfully conveys the nuances of their conception situation while putting their joyful nerdiness on full-frontal display.

Also, it’s so much better than the first one, it’s not even funny.

A Small Announcement – as told through Science Fiction

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World’s longest sniper kill – 2.47km twice!

By (author unknown), Gizmag Emerging Technology MagazineMay 05, 2010 at 05:16AM

World's longest sniper kill - 2.47km twice!

The sniper is without doubt the most feared combatant in any theater of war, the best of whom have an array of skills far beyond simply being able to hit human targets at a distance. Snipers are the most cost effective way of killing the enemy. Individual snipers routinely account for more kills than entire battalions operating in the same place at the same time, hit the target almost every time, and each bullet costs around €2. An elite sniper’s skills cannot be assessed with a single measurement, so the “longest confirmed kill” record stands as the pseudo world championship for military combat riflemen, and as of now there’s a new outright champion – using an Accuracy International L115A3, British Corporal Craig Harrison killed two Taliban with consecutive shots at a distance of 2.47 kilometres (8120 ft) in Helmand Province, Afghanistan last November (2009). He then fired a third shot and hit the Taliban’s PKM machinegun in perhaps the most prodigious feat of marksmanship in military history…
Continue Reading World’s longest sniper kill – 2.47km twice!

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