me, 2.0: jose nazario
beauty and the street
Four short links: 25 December 2013
task force, safety net, in order, Alan Turing
Prediction: The Government Will Put The NSA In Check | TechCrunch -- Limited Access To Bulk Data: The mass collection of telephone and Internet data is really what sets off Americas hair-trigger anti-authoritarian rage. Obamas task force recommended that telephone companies be the gatekeepers of data, which the government can request with judicial oversight. Congress has already proposed revoking data access from thousands of future Edward Snowdens, who had disturbingly high-level access to spy on Americans.
Guideposts on the Road Back to Factville, 2013 Edition | Jared Bernstein | On th ... -- Last year around this time I posted my ten favorite graphs from my prolific colleagues at the Center on Budget and Policy Priorities. Its tough to make the cut. If I may be permittedand Im bragging on my friends, not mewe at CBPP make a lot of revealing graphs. But Ive chosen the ones that I think shine the brightest light on the path back to smart fiscal and economic policy. Ive added short annotations but follow the links for more info. Ill never raise tax revenue. Well, heres a way to do both: end some of the regressive tax expendituressorry, spending through the tax codethat deliver two-thirds of their goodies to the top fifth of the income scale and youll raise some serious revenue.
What Makes The Quadcopter Design So Great For Small Drones? - Forbes -- HOWEVER, because a quadcopter has to use its motors to speed up or slow down a prop, there is a built-in delay time to how fast a quadcopter can react because it takes time to change the speed of the prop due to inertia. On a quadcopter, there isnt this point of inefficiency, but having to continuously slow down and speed up the props to remain in the air does waste a lot of energy (however regenerative braking would reduce this wastage, but not many models do this at the moment). Whats interesting is that the effect of this was very evident when we were tuning our quadcopter our quadcopters were designed to lift about 1kg of payload, but they could be made to lift a brick (about 2.3-2.6kg) ONLY if the stabilization tunings were relaxed so that the craft was less stable in the air, but wasted less energy trying to stay absolutely level. Either way, aerodynamically, larger and slower spinning props are more efficient than small fast-spinning props. Therefore a large, slower-moving prop is more efficient than a small large-moving prop, especially at hover. What makes quadcopters so popular is is the fact that because of this simplicity, you dont have to worry about mechanical design at all, you can duct-tape four motors to some sticks and let the electronic stabilization take care of correcting flight dynamics of an appalling mechanical design.
Alan Turing, Enigma Code-Breaker and Computer Pioneer, Wins Royal Pardon - NYTim ... -- Nearly 60 years after his death, Alan Turing, the British mathematician regarded as one of the central figures in the development of the computer, received a formal pardon from Queen Elizabeth II on Monday for his conviction in 1952 on charges of homosexuality, at the time a criminal offense in Britain. Mr. Grayling said in a statement that Mr. Turing, whose most remarkable achievement was helping to develop the machines and algorithms that unscrambled the supposedly impenetrable Enigma code used by the Germans in World War II, deserves to be remembered and recognized for his fantastic contribution to the war effort and his legacy to science.
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