Jurnal Singkat

http://georgemdallas.wordpress.com/2013/07/13/how-to-build-an-anti-aircraft-missile-probability-bayes-theorem-and-the-kalman-filter/ How to build an Anti Aircraft Missile: Probability, Bayes’ Theorem and the Kalman Filter Ever wondered how an Anti Aircraft Missile works? A plane can move at different speeds and altitudes, so how do you know when to fire your missile? Well you need to know two things: where the aircraft is now and where it will be a short time in the future. The reason you need to know where it will be in the future is because your missile takes time to reach the plane’s altitude, so you need to aim at where the plane will be, not where it is now. Engineers use a nifty thing called the Kalman Filter in order track objects and predict where they will be. The Kalman Filter isn’t just used for missiles, it also plays an integral role in GPS, self driving cars, auto pilot, AI and robotics. What is this Kalman Filter then? It’s a recursive way ...

http://www.nytimes.com/2013/07/16/us/study-finds-early-signs-of-creativity-in-adults.html?_r=0 Study Finds Spatial Skill Is Early Sign of Creativity By DOUGLAS QUENQUA Published: July 15, 2013 Facebook Twitter Google+ Save E-mail Share Print Reprints A gift for spatial reasoning — the kind that may inspire an imaginative child to dismantle a clock or the family refrigerator — may be a greater predictor of future creativity or innovation than math or verbal skills, particularly in math, science and related fields, according to a study published Monday in the journal Psychological Science . Connect With Us on Social Media @nytimesscience on Twitter. Science Reporters and Editors on Twitter Like the science desk on Facebook. The study looked at the professional success of people who, as 13-year-olds, had taken both the SAT, because they had been flagged as particularly gifted, as well as the Diff...

http://www.guardian.co.uk/world/2013/jul/16/amartya-sen-india-dirty-fighter Amartya Sen: India's dirty fighter Half of Indians have no toilet. It's one of many gigantic failures that have prompted Nobel prize-winning academic Amartya Sen to write a devastating critique of India's economic boom Share 6581 in Share 51 Email Madeleine Bunting The Guardian , Tuesday 16 July 2013 17.15 BST Jump to comments ( 225 ) Link to video: Amartya Sen: India has many achievements but some gigantic failures The roses are blooming at the window in the immaculately kept garde...

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http://www.righto.com/2013/07/reverse-engineering-flag-circuits-in.html?m=1 Processors all have status flags to keep track of conditions such as a zero value, a carry, or a negative value. Whenever you write a loop or conditional, these flags ultimately are in control. But how are these flags implemented in the chip's silicon? I've reverse-engineered the flag circuits in the 8085 microprocessor and explain what is really going on. The photograph below is a highly magnified image of the 8085's silicon, showing the relevant parts of the chip. In the upper-left, the arithmetic logic unit (ALU) performs 8-bit arithmetic operations. The status flag circuitry is below the ALU and the flags are connected to the data bus (indicated in blue). To the right of the ALU, the control PLA decodes the instructions into control lines that control the operations of the ALU and flag circuits. The 8085 has seven status flags. Bit 7 is the sign flag, indicating a negativ...

http://translate.google.com/translate?sl=de&tl=en&js=n&prev=_t&hl=de&ie=UTF-8&u=http%3A%2F%2Ffrank.geekheim.de%2F%3Fp%3D2379&act=url Summary in english: When you enter your POP / IMAP email credentials into a BlackBerry 10 phone theywill be sent to BlackBerry without your consent or knowledge. A server with the IP 68.171.232.33 Which is in the Research In Motion (RIM) in Canada netblock will instantly connect to your mail server and log in with your credentials. If you do not have forced SSL / TLS Configured on your mail server, your credentials will be sent in the clear by BlackBerry's server for the connection. BlackBerry Malthus has not only your e-mail credentials stored in its database, it makes them available to anyone sniffing inbetween - Namely the NSA and GCHQ as Documented by the recent Edward Snowden leaks. Canada is a member of the "Five Eyes", the tigh-knitted cooperation between the interception agencies...

http://www.theatlantic.com/politics/archive/2013/07/mission-creep-when-everything-is-terrorism/277844/ NSA apologists say spying is only used for menaces like "weapons of mass destruction" and "terror." But those terms have been radically redefined. Bruce Schneier Jul 16 2013, 1:43 PM ET 10 in Share More Fer Gregory/Shutterstock One of the assurances I keep hearing about the U.S. government's spying on American citizens is that it's only used in cases of terrorism. Terrorism is, of course, an extraordinary crime, and its horrific nature is supposed to justify permitting all sorts of excesses to prevent it. But there's a problem with this line of reasoning: mission creep. The definitions of "terrorism" and "weapon of mass destruction" are broadening, and these extraordinary powers are being u...

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http://www.righto.com/2012/03/inside-cheap-phone-charger-and-why-you.html Tiny, cheap, and dangerous: Inside a (fake) iPhone charger Thoughts on the death of Ma Ailun According to reports , a woman in China was tragically electrocuted using her iPhone while it was charging. This seems technically plausible to me if she were using a cheap or counterfeit charger like I describe below. There's 340 volts DC inside the charger, which is enough to kill. In a cheap charger, there can be less than a millimeter separating this voltage from the output, a fraction of the recommended safe distance. These charger sometimes short out ( picture ), which could send lethal voltage through the USB cable. If the user closes the circuit by standing on a damp floor or touching a grounded metal surface, electrocution is a possibility. If moisture condenses in the charger (e.g. in a humid bathroom), shorting becomes even more likely. Genuine Apple chargers (and other brand-name...