Older blog entries for sness (starting at number 5710)

Scientists use iPods, car batteries to build a frog surveillance net | Ars Technica

Scientists use iPods, car batteries to build a frog surveillance net | Ars Technica: " Arbimon (Automated Remote Biodiversity Monitoring Network), was created by a team led by Dr. Mitchel Aide and Dr. Carlos Corrada-Bravo of the University of Puerto Rico. As described in a paper published by the team in PeerJ today, Arbimon's monitoring stations use an iPod recording application to capture up to 144 one-minute audio recordings per day of animal calls. Most of the components of the monitoring stations—the iPod, the battery, a voltage converter, a preamplifier for the microphone, and a router—are in a sealed watertight case. A 50-watt solar panel powers the system and charges the battery during the day."

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Syndicated 2013-07-20 20:36:00 from sness

The Big Blob » Moore Neighbor Contour Tracing Algorithm in C++

The Big Blob » Moore Neighbor Contour Tracing Algorithm in C++: "This post shows the implementation of Moore’s neighbor tracing algorithm in C++. This algorithm performs what is called contour tracing i.e.
tracing the borders or boundaries of, in this case, a binary image. The two images below illustrates what the algorithm does with a pure black and white/binary image."

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Syndicated 2013-07-19 21:24:00 from sness

Moore neighborhood - Wikipedia, the free encyclopedia

Moore neighborhood - Wikipedia, the free encyclopedia: "In cellular automata, the Moore neighborhood comprises the eight cells surrounding a central cell on a two-dimensional square lattice. The neighborhood is named after Edward F. Moore, a pioneer of cellular automata theory. It is one of the two most commonly used neighborhood types, the other one being the 4-cell von Neumann neighborhood. The well known Conway's Game of Life, for example, uses the Moore neighborhood. It is similar to the notion of 8-connected pixels in computer graphics."

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Syndicated 2013-07-19 20:06:00 from sness

Exploring the HTML5 Web Audio: visualizing sound | Smartjava.org

Exploring the HTML5 Web Audio: visualizing sound | Smartjava.org: "Create an analyzer node: With this node we get realtime information about the data that is processed. This data we use to determine the signal strength
Create a javascript node: We use this node as a timer to update the volume meters with new information
Connect everything together"

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Syndicated 2013-07-19 19:52:00 from sness

How to keep files safe from accidental overwriting with noclobber under BASH shell

How to keep files safe from accidental overwriting with noclobber under BASH shell: "Sometime you just need to turn off noclobber for single operation. Use >| operator to force the file to be overwritten:
$ ls /etc >| output.txt
$ less output.txt

"

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Syndicated 2013-07-17 17:52:00 from sness

linux - Bash Loop - How to stop the loop when I press Control-C inside a command? - Server Fault

linux - Bash Loop - How to stop the loop when I press Control-C inside a command? - Server Fault: "for DIR in * ; do rsync -a $DIR example.com:somewhere/ || break; done"

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Syndicated 2013-07-17 17:14:00 from sness

Do Things that Don't Scale

Do Things that Don't Scale: "It's not enough just to do something extraordinary initially. You have to make an extraordinary effort initially. Any strategy that omits the effort—whether it's expecting a big launch to get you users, or a big partner—is ipso facto suspect."

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Syndicated 2013-07-16 23:16:00 from sness

Magnolia - Wikipedia, the free encyclopedia

Magnolia - Wikipedia, the free encyclopedia: "Magnolia is a large genus of about 210[1] flowering plant species in the subfamily Magnolioideae of the family Magnoliaceae. It is named after French botanist Pierre Magnol."

Syndicated 2013-07-16 18:20:00 from sness

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