The use of mobile and computers’ become so common that we probably don’t even know our personal information secretly leaks to others.
Just try to recall how many public figures’ personal information or photos leaked to the public over the last 10 years. And look at what’s just recently happened to Emma Watson and Amanda Seyfriend with their private photos on the phone got hacked.
In fact, the leakage of personal information has become so easily that even the FBI director covered his personal laptop’s webcam with a piece of tape. He suggested us to cover our in-computer webcam with a tape because this is an essential security step that everyone should take.
Director James Comey said during a conference at the Center for Strategic and International Studies,
“There’s some sensible things you should be doing, and that’s one of them. You go into any government office and we all have the little camera things that sit on top of the screen. You do that so that people who don’t have authority don’t look at you. I think that’s a good thing.”
So, how what do we do to protect our privacy and encrypt our life?
Doubling up the safeness – Use two-factor authentication for your email account.
Lots of our social media or online tools accounts are connected with our email account. If your email account gets hacked, besides having your email information and contact list leaked, all the other connected accounts will…
Some apps, like Dropbox and Steam, will ask to “control this computer using accessibility features.” But what the heck does that even mean?
The wording is confusing, to say that least. What does this permission actually grant? Basically, this gives the app in question the ability to control other programs. Apple outlines their advice here:
If you’re familiar with an app, you can authorize it by clicking Open System Preferences in the alert, then selecting the checkbox for the app in the Privacy pane. If you’re unfamiliar with an app or you don’t want to give it access to your Mac at that time, click Deny in the alert.
But that just leaves more questions. Why do you have to give this permission at all? What does giving this permission mean—will such applications really “control this computer”? And why is this called “Accessibility” access, instead of just system access? Let’s break this down.
The process of enabling Accessibility Settings is a bit convoluted. You need to open System Preferences, then head to Security & Privacy > Privacy > Accessibility. From there you need to click the lock icon in the bottom-left corner, enter you password, and only then can you grant your application access.
So why do you have to do this? The answer, in short, is to protect your security.
By default, Mac apps are self-contained, and can’t change the way you interact with the system or other applications. This is a very good thing. It prevents sketchy things from happening, like games you’ve downloaded logging your keystrokes or malware clicking buttons in your browser.
But some applications need to control other applications to…
In many periods of history, women have been discouraged from applying their minds to mathematics—but a few persevered. The world-altering contributions of these 15 notable female mathematicians include making hospitals safer, laying the groundwork for the computer, and advancing space flight.
Hypatia (c.355–415) was the first woman known to have taught mathematics. Her father Theon was a famous mathematician in Alexandria who wrote commentaries on Euclid’s Elements and works by Ptolemy. Theon taught his daughter math and astronomy, then sent her to Athens to study the teachings of Plato and Aristotle. Father and daughter collaborated on several commentaries, but Hypatia also wrote commentaries of her own and lectured on math, astronomy, and philosophy. Sadly, she died at the hands of a mob of Christian zealots.
Emilie Du Chatelet (1706–1749) was born in Paris in a home that entertained several scientists and mathematicians. Although her mother thought her interest in math was unladylike, her father was supportive. Chatalet initially employed her math skills to gamble, which financed the purchase of math books and lab equipment.
In 1725 she married an army officer, the Marquis Florent-Claude du Chatalet, and the couple eventually had three children. Her husband traveled frequently, an arrangement that provided ample time for her to study mathematics and write scientific articles (it also apparently gave her time to have an affair with Voltaire). From 1745 until her death, Chatalet worked on a translation of Isaac Newton’s Principia. She added her own commentaries, including valuable clarification of the principles in the original work.
Sophie Germain (1776–1831) was only 13 when she developed an interest in mathematics, one that could be blamed on the French Revolution. Since the fighting raged around her home, Germain could not explore the streets of Paris—instead she explored her father’s library, teaching herself Latin and Greek and reading respected mathematical works. Germain’s family also tried to discourage her academic leanings. Not wanting her to study at night, they denied her a fire in her room, but she lit candles and read anyway, bundled in blankets.
Since women’s educational opportunities were limited, Germain studied secretly at the Ecole Polytechnique, using the name of a previously enrolled male student. That worked until the teachers noticed the dramatic improvement in the student’s math skills.
Although Germain never worked as a mathematician, she studied independently and wrote about the subject. She is best known for her work on Fermat’s Last Theorem, considered at the time to be one of the most challenging mathematical puzzles. A 17th century mathematician named Pierre de Fermat claimed he could prove that the equation x^n + y^n = z^n had no integer solution when n was greater than 2, but his proof was never written down. Germain proposed a new way of looking at the problem.
Germain also became the first woman to win a prize from the Paris Academy of Sciences, for writing about elasticity theory. Today that prize is known as the Sophie Germain Prize.
4. MARY SOMERVILLE
Mary Somerville (1780–1872) was born in Scotland, and was not particularly interested in academics as a child—she only attended school for a year. However, when she encountered an algebra symbol in a puzzle at age 16, she became fascinated with math and began studying it on her own. Her parents tried to discourage her, worried that her intellectual preoccupations might drive her insane. (At the time, a popular theory held that difficult study could damage a woman’s mental health.) But Somerville continued to study, teaching herself Latin so she could read earlier versions of works by Euclid.
She also corresponded with William Wallace, a professor of mathematics at Edinburgh University, and solved mathematical problems posed in contests, winning a silver prize in 1811.
Somerville’s first husband did not encourage her interests, but when he died, she remarried. Her second husband, Dr. William Somerville, an inspector of the Army Medical Board, was proud of her work in mathematics and astronomy. For her work translating a book titled Celestial Mechanics and adding commentary, she was named an honorary member of the Royal Astronomical Society.
Physicist Sir David Brewster called her “certainly the most extraordinary woman in Europe—a mathematician of the very first rank with all the gentleness of a woman.” When John Stuart Mill petitioned the British government for women’s votes, he filed his petition with Somerville’s signature first. She was proof that women were men’s intellectual equals.
The next time you download some electronica, you may want to remember Augusta Ada King-Noel, Countess of Lovelace (1815–1852). Lovelace was born during the brief marriage of poet George, Lord Byron and Anne Milbanke, Lady Wentworth. Her mother did not want her to be a poet like her father and encouraged her interest in mathematics and music. As a teenager, Ada began to correspond with Charles Babbage, a professor at Cambridge. At the time, Babbage was working on his ideas for a calculating machine called the Analytical Engine, now considered a precursor to the computer. Babbage was solely focused on the calculating aspects, but Lovelace supplied notes that helped envision other possibilities, including the idea of computer-generated music.
Lovelace also translated an article about the Analytic Engine by French mathematician Louis Menebrea. Her notes include an algorithm showing how to calculate a sequence of numbers, which forms the basis for the design of the modern computer. It was the first algorithm created expressly for a machine to perform.
Lovelace was a countess after her marriage, but she preferred to describe herself as an analyst and a metaphysician. Babbage called her “the enchantress of numbers”—but she might also be called the world’s first computer programmer.
Florence Nightingale (1820–1910) is best known as a nurse and social reformer, but a lesser-known contribution of hers continues to save lives. In her efforts to improve the survival rates of hospital patients, Nightingale became a statistician.
When the “lady with the lamp” returned from service during the Crimean War, she expressed sadness about how many soldiers had become sick and died while lying in the hospital. “Oh my poor men, who endured so patiently,” she wrote to a friend. “I feel I have been a bad mother to you to come home and leave you lying in your Crimean graves.”
As part of her plan to reform hospital care, Nightingale began gathering statistics. The figures she gathered indicated that a lack of sanitation…
Despite its limitations, the ZX81 was a revolution, because it cost just £49.95 in the U.K.—massively cheaper than anything else on the market. It was also available in normal retail stores, rather than specialty computer shops.
It really was the people’s computer, and for many it was their introduction to home computing and computer programming. Incidentally, at that cheap price, it was a kit you assembled at home (a soldering iron was required). You’d have to pay an extra £20 if you wanted a pre-assembled unit. In the U.S., the fully-assembled unit cost $149.95.
The ZX81 was also expandable. You could upgrade it from its RAM using an…
In the battle of wits between humans and machines, computers have just upped the ante.
Two new poker-playing programs can best professionals at heads-up no-limit Texas Hold’em, a two-player version of poker without restrictions on the size of bets. It’s another in a growing list of complex games, including chess, checkers (SN: 7/21/07, p. 36) and Go (SN: 12/24/16, p. 28), in which computers reign supreme.
Computer scientists from the University of Alberta in Canada report that their program, known as DeepStack, roundly defeated professional poker players, playing 3,000 hands against each. The program didn’t win every hand — sometimes the luck of the draw was against it. But after the results were tallied, DeepStack beat 10 out of 11 card sharks, the scientists report online March 2 in Science. (DeepStack also beat the 11th competitor, but that victory was not statistically significant.)
“This work is very impressive,” says computer scientist Murray Campbell, one of the creators of Deep Blue, the computer that bested chess grandmaster Garry Kasparov in 1997. DeepStack “had a huge margin of victory,” says Campbell, of IBM’s Thomas J. Watson Research Center in Yorktown Heights, N.Y.
Likewise, computer scientists led by Tuomas Sandholm of Carnegie Mellon University in Pittsburgh recently trounced four elite heads-up no-limit Texas Hold’em players with a program called Libratus. Each contestant played 30,000 hands against the program during a tournament held in January in Pittsburgh. Libratus was “much tougher than any human I’ve ever played,” says poker pro Jason Les.
If you grew up using an Apple II computer of some flavor, likely you have fond memories of playing games like Karateka, Oregon Trail, or other fun and/or educational titles. perhaps you never considered it at the time, but how neat would if have been if one those computers could be transported to whatever location you desired to be used without external power?
Chris Larkin, a California-based software engineer, decided to take on this challenge (see his GitHub writeup) using already designed 3D print file of the Apple II computer (base, monitor), and added his own custom bracket for a CHIP computer. This computer emulates an Apple II using LinApple-Pi software. The resulting build is an extremely small version of an Apple II computer that looks strikingly like a tiny version of the original (or at least one iteration of this system).
Power for this setup is provided by a high capacity 12 volt “drone” battery, which Larkin estimates will give him about 10 hours of use between charges. Deciding on this setup was a bit of a challenge, as the monitor required 12 volts, and the CHIP can only handle about 5. Originally he tried to use a 3.6 volt boost converter to power both, but this only gave about an hour of battery life and ran hot. In the end, he ended up instead stepping down this 12 volt power with a buck converter to power the CHIP.
Once you dig a little further into the build, there are a few things you might not expect on an Apple II, including a composite video socket on the…
Ada Lovelace is widely considered to be the first computer programmer. She worked with Charles Babbage on his proto-computer designs, and translated an academic paper about Babbage’s Analytical Engine from French to English. In the process, she discovered errors in Babbage’s design, fixed them, and added a pile of new commentary in a series of notes that were longer than the original paper itself.