Misc for now
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Sunday 31 March 2013
Apples are one of the most delicious and easy-to-carve materials readily available, along with other fruits, and conveniently come in spheroids that are perfect for slicing into convex polyhedra! Besides the obvious aesthetic benefits of having a set of platonic applehedra of your own, they are also good for slicing and truncating. I used Granny Smiths because they have firm flesh and don't brown as fast as some types of apples (of course one could also use other fruits... see bottom of page!). Making these was an interesting exercize for me mathematically, because though I knew intellectually how to slice a sphere to have the slice intersect a set of points, it felt a bit unintuitive to actually do. Perhaps the easiest platonic solid to carve is the cube, not because it is the simplest (that honor goes to the tetrahedron) but because it is the most familiar. It's also great for slicing into hexagons .
The Unique Brain Anatomy of Meditation Practitioners: Alterations in Cortical Gyrification | Frontiers in Human Neuroscience1 Laboratory of Neuro Imaging, Department of Neurology, UCLA School of Medicine, Los Angeles, CA, USA 2 Department of Medicine, Center for Neurobiology of Stress, UCLA School of Medicine, Los Angeles, CA, USA 3 Department of Psychiatry, University of Jena, Jena, Germany 4 Department of Neurology, University of Jena, Jena, Germany Several cortical regions are reported to vary in meditation practitioners. However, prior analyses have focused primarily on examining gray matter or cortical thickness. Thus, additional effects with respect to other cortical features might have remained undetected.
This is just one more awesome thing Wolfram Alpha is capable of: it can take a jumbled set of letters and tell you what Scrabble words you can make with them. It's Friday, and if you're spending your last weekday trying to beat your mom at Words With Friends (like I am), Wolfram Alpha has a hidden little tool to help you out. Just type "scrabble" into its search bar, hit "computation" in the results, and it'll bring up a Scrabble word calculator. Just type in the letters you have (include any spaces for blank tiles) and it'll tell you what words you can make, including how many points they'd be worth. Sure, it's probably technically cheating, but I won't tell if you don't, okay?
by Maria Popova What the free speech movement of the 1960s has to do with digital learning and The Beatles. Education is something we’re deeply passionate about, but the fact remains that today’s dominant formal education model is a broken system based on antiquated paradigms. While much has been said and written about education reform over the past couple of years, the issue and the public discourse around it are hardly new phenomena.
If you spend a lot of effort in having a vegetable or flower garden, seeing aphids or lacewings on prized plants sends most people out to their local big box home improvement center for conventional or organic insecticides. Using insecticides will kill both prey insects like aphids and lacewings that eat your plants but also predator insects such as ladybugs that feed on prey insects. It may be better just to leave the plans alone and let the predator insects do their job. Homesteading magazine Mother Earth News' weblog makes the case that using insecticide is a bad idea in the long run as prey insects multiply quickly enough that after a few generations (for insects this can be just a few years or even months) they have build up an immunity to the insecticides and you have killed off beneficial predator insects as they have a lower reproductive rate than prey insects and are more susceptible to being wiped out by insecticides.
What the Research on Habit Formation Reveals About Willpower (And How You Can Apply it to Your Life)In the past decade, there has been a lot of fascinating academic research conducted around habit formation and willpower. By examining things like how smokers quit, why student perform well, and how New Year's resolvers stay on track, researchers are starting to piece together the answers to how we can build lasting habits and improve our ability to resist temptation. One surprising result is this: to improve your overall well-being, start a new regular habit.
Dear Lifehacker, With all the hullaballoo about Carrier IQ spying on all those phones , I'm left wondering what else is my phone gathering about me? Should I be concerned, and if so, what should I do about it? Signed, Not Trying To Be Paranoid Dear NTTBP, A healthy dose of skepticism is, well, healthy, and you're definitely not alone in wondering what kind of private information your phone is gathering and what's being done with it. The CarrierIQ rootkit is the most recent of many mobile privacy and security concerns that have been raised (though particularly worrisome because it comes preinstalled on your phone, and removing it can be difficult).
Whenever discussing bitcoin, I always keep these points in mind. During discussion, I make sure to cover each point and not dwell on any one topic unless the other person is engaged. Belief systems are constructed from ideas and concepts, so to convey the importance of bitcoin, you need to show that the system does not offer any one incremental advantage, but a veritable smorgasbord of new concepts never encountered before in history. Decentralised and free from control No regulations: while the advantages of decentralization might not seem at first apparent, consider that a decentralized structure constitutes an incorruptible medium. This is the first time we have such technology.
This manual is the main resource for both building and maintaining a Lasersaur laser cutter. The basic idea is, when you build it you can easily maintain it. The other idea is that an open source design can improve over time through the collaboration of many people. We hope in three years it will have evolved to the point where it has multiple robotic arms sticking out capable of building space stations :) DISCLAIMER: Please be aware that operating a self-built laser cutter can be dangerous and requires full awareness of the risks involved. NORTD Labs does not warrant for any contents of the manual and does not assume any risks whatsoever with regard to the contents of this manual or the machine assembled by you.
First published Tue Aug 21, 2007; substantive revision Thu Aug 2, 2012 R. G. Collingwood (1889-1943) was primarily a general philosopher and philosopher of history, and considered his work in aesthetics—the principal work being his The Principles of Art (1938)—as secondary.
Even with a second glance, these amazingly intricate origami designs by Brian Chan still look like real insects . The 31-year old has been working with paper since his youth, making other’s designs and perfecting is craft. In recent years he’s started creating his own designs, carefully planning exactly where folds need to be in a flat sheet of paper… transforming it into a miniature, lifelike sculpture. I’ve included one of his plans below to show how astounding the detail in his planning actually is… remember, these are all one sheet of uncut paper!! Considering the near impossible detail that goes into each of his pieces, it might not come as a surprise when I tell you that Chan is an instructor at Massachusetts Institute of Technology (MIT), where he teaches crafts.
social & environmental responsibility Data is collected over the past 20 years from a wide range of nonprofit sources on the social and environmental responsibility of more than 1000 companies.* STEP .two The data is organized in a massive database that matches companies with their brands, assigns weights to each piece of data, and calculates an overall responsibility score.