Habits

Highly Effective Students Never procrasitinate their planned study session.

Highly Effective Students  Never procrasitinate their planned study session.      Mostrar detalle

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Habits

Highly Effective Students Always review their notes before starting an assigment.

Highly Effective Students Always review their notes before starting an assigment.      Mostrar detalle

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Habits

Highly Effective Students Make sure they're not distracted while they're studying.

Highly Effective Students Make sure they're not distracted while they're studying.      Mostrar detalle

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Physics

Deep probe of antimatter puts Einstein’s special relativity to the test. By @NewsfromScience

Deep probe of antimatter puts Einstein’s special relativity to the test. By @NewsfromScience     After decades of effort, physicists have probed the inner working of atoms of antihydrogen—the antimatter version of hydrogen—by measuring for the first time a particular wavelength of light that they absorb. The advance opens the way to precisely comparing hydrogen and antihydrogen and, oddly, testing the special theory of relativity—Albert Einstein’s 111-year-old theory of how space and time appear to observers moving relative to one another, which, among other things, says that nothing can move faster than light. "It's a stunning result," says Alan Kostelecky, a theorist at Indiana University in Bloomington who was not involved in the work. For decades, experimenters have dreamed of measuring the spectrum of light absorbed by antihydrogen, Kostelecky says. "Here it is. They're doing it now." Just as an atom of hydrogen consists of an electron bound to a proton, antihydrogen is an antielectron (or positron) bound to an antiproton. Of course, antihydrogen doesn't occur in nature. Because matter and antimatter particles annihilate each other, antihydrogen would vanish as soon as it touched matter. So physicists must make the stuff in the lab. Still, they expect the properties of antihydrogen to exactly mirror those of hydrogen. Mostrar detalle

ID: 687 C: 5 I: 4465 F: 9.543
    

Mathematics

Her work with differential equations contributed to advances in the study of fluid dynamics

Her work with differential equations contributed to advances in the study of fluid dynamics     

Dr. Olga Ladyzhenskaya

Mathematician whose work with differential equations contributed to advances in the study of fluid dynamics in areas like weather forecasting, oceanography, aerodynamics and cardiovascular science, died on Jan. 12 in St. Petersburg, Russia. She was 81. The cause of death had not been determined, according to a spokeswoman for the Association for Women in Mathematics, in College Park, Md. Dr. Ladyzhenskaya was a member of the organization. Her primary work was on calculations that were developed in the 19th century to explain the behavior of fluids and known as Navier-Stokes equations. As a researcher first at St. Petersburg University and later at the Steklov Institute of Mathematics, also in St. Petersburg, she worked through the solutions for the equations, which show how a number of variables relate in time and space. Among other practical uses, the equations enable meteorologists to predict the movement of storm clouds. Mostrar detalle

ID: 679 C: 5 I: 4493 F: 9.529
    

Encyclopedia

This free online encyclopedia has achieved what Wikipedia can only dream of

This free online encyclopedia has achieved what Wikipedia can only dream of     The Stanford Encyclopedia of Philosophy may be the most interesting website on the internet. Not because of the content—which includes fascinating entries on everything from ambiguity to zombies—but because of the site itself. 1 Its creators have solved one of the internet’s fundamental problems: How to provide authoritative, rigorously accurate knowledge, at no cost to readers. It’s something the encyclopedia, or SEP, has managed to do for two decades. The internet is an information landfill. Somewhere in it—buried under piles of opinion, speculation, and misinformation—is virtually all of human knowledge. The story of the SEP shows that it is possible to create a less trashy internet. But sorting through the trash is difficult work. Even when you have something you think is valuable, it often turns out to be a cheap knock-off. The story of how the SEP is run, and how it came to be, shows that it is possible to create a less trashy internet—or at least a less trashy corner of it. A place where actual knowledge is sorted into a neat, separate pile instead of being thrown into the landfill. Where the world can go to learn everything that we know to be true. Something that would make humans a lot smarter than the internet we have today. Mostrar detalle

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Active-logic

The machine could write a symbol on the tape, or delete a symbol from the tape

The  machine could write a symbol on the tape, or delete a symbol from the tape     

Alan Mathison Turing

He graduated in 1934 then, in the spring of 1935, he attended Max Newman's advanced course on the foundations of mathematics. This course studied Gödel's incompleteness results and Hilbert's question on decidability. In one sense 'decidability' was a simple question, namely given a mathematical proposition could one find an algorithm which would decide if the proposition was true of false. For many propositions it was easy to find such an algorithm. The real difficulty arose in proving that for certain propositions no such algorithm existed. When given an algorithm to solve a problem it was clear that it was indeed an algorithm, yet there was no definition of an algorithm which was rigorous enough to allow one to prove that none existed. Turing began to work on these ideas. Turing was elected a fellow of King's College, Cambridge, in 1935 for a dissertation On the Gaussian error function which proved fundamental results on probability theory, namely the central limit theorem. Although the central limit theorem had recently been discovered, Turing was not aware of this and discovered it independently. In 1936 Turing was a Smith's Prizeman. Turing's achievements at Cambridge had been on account of his work in probability theory. However, he had been working on the decidability questions since attending Newman's course. In 1936 he published On Computable Numbers, with an application to the Entscheidungsproblem. It is in this paper that Turing introduced an abstract machine, now called a "Turing machine", which moved from one state to another using a precise finite set of rules (given by a finite table) and depending on a single symbol it read from a tape. Mostrar detalle

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Women

Malala Yousafzai designated youngest-ever UN Messenger of Peace

Malala Yousafzai designated youngest-ever UN Messenger of Peace     10 April 2017 – United Nations Secretary-General António Guterres today designated children’s rights activist and Nobel Laureate Malala Yousafzai as a UN Messenger of Peace with a special focus on girls’ education. “You have been to the most difficult places […] visited several refugee camps. Your foundation has schools in Lebanon, in the Beka’a Valley,” said Mr. Guterres at a ceremony in the Trusteeship Council chamber at UN Headquarters, in New York. “[You are a] symbol of perhaps the most important thing in the world, education for all,” he highlighted. Ms. Yousafzai, who was shot in 2012 by the Taliban for attending classes, is the youngest-ever UN Messenger of Peace and the first one to be designated by Secretary-General Guterres since he assumed office in January this year. Accepting the accolade, Ms. Yousafzai underscored the importance of education, especially education of girls, for advancing communities and societies. Mostrar detalle

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Education

Alibaba founder Jack Ma:´Harvard rejected me 10 times´

Alibaba founder Jack Ma:´Harvard rejected me 10 times´     In this video interview, filmed at the World Economic Forum's Annual Meeting in Davos last year, Alibaba founder Jack Ma described the failures and triumphs that got him where he is today, blazing a trail through the global e-commerce industry. He also explains why beer is important and rejection is a blessing, and that his dexterity with the English language comes courtesy of Richard Nixon. He also explains why beer is important and rejection is a blessing, and that his dexterity with the English language comes courtesy of Richard Nixon. Mostrar detalle

ID: 184 C: 5 I: 5439 F: 9.313
    

Autism

Autism breakthrough: One protein's sweeping influence on development of autism revealed

Autism breakthrough: One protein's sweeping influence on development of autism revealed     As many as a third of autism cases could be explained by a scarcity of a single protein in the brain, Toronto scientists have revealed. The findings provide a unique opportunity to develop treatments for a disorder that is rooted in a motley crew of genetic faults. Researchers induced autistic-like behaviour in mice by lowering the levels of a protein called nSR100 (also known as SRRM4), which is important for normal brain development. The study, published in the December 15 issue of the journal Molecular Cell, builds on the teams' previous work which showed that the nSR100 protein was reduced in the brains of autistic people. The teams were led by Professors Benjamin Blencowe of the University of Toronto's Donnelly Centre and Sabine Cordes of the Department of Molecular Genetics and Sinai Health System's Lunenfeld-Tanenbaum Research Institute. Mostrar detalle

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