http://www.youtube.com/watch?v=T_lh5fR4DMARelated: trash • 13
Contact – Marcus du Sautoy Charles Simonyi Professor for the Public Understanding of Science and Professor of Mathematics Fellow of New College Mathematical Institute University of Oxford 24-29 St Giles Oxford OX1 3LB U.K. To contact my PA please firstname.lastname@example.org To contact my agent Antony Topping please email@example.com
Algorithmic trading in less than 100 lines of Python code – O’Reilly Algorithmic Trading Algorithmic trading refers to the computerized, automated trading of financial instruments (based on some algorithm or rule) with little or no human intervention during trading hours. Almost any kind of financial instrument — be it stocks, currencies, commodities, credit products or volatility — can be traded in such a fashion. Not only that, in certain market segments, algorithms are responsible for the lion’s share of the trading volume. The books The Quants by Scott Patterson and More Money Than God by Sebastian Mallaby paint a vivid picture of the beginnings of algorithmic trading and the personalities behind its rise. The barriers to entry for algorithmic trading have never been lower.
The Fourier Transform - But Why? Intuitive Mathematics Now, we are told to multiply this by our function f(x). How do you multiply a function by a spinning dot? Well, it might first help to look at their product in symbol form: Here we can see this is nothing but a complex number in polar form: the distance from the origin is given by f(x), and the angle by our exponential. See The Engineering Behind This Floating, Award-Winning Stone Helical Stair See The Engineering Behind This Floating, Award-Winning Stone Helical Stair Helical staircases are often designed to be show-stoppers, focal points of architectural spaces that are intended to impress. But even compared to its eye-catching peers, this staircase developed by Webb Yates Engineers and The Stonemasonry Company is unusually audacious. Developed for a residential design by RAL Architects in Formby, UK, each step of the two-story, 4.6-meter diameter helical staircase is composed of an individual block of stone, giving an impression of weightlessness as the structure circles its way up through the building's atrium towards the glazed roof above.
Understanding the Basics of Fourier Transforms I was chatting with my colleague Steve Hanly about his recent post on the Fourier transform and power spectral density, and we thought it might help to go a bit more into the math and guts of the Fourier transform. As we know, the Fourier transform is a common and useful engineering tool for analyzing signals and vibrations, but sometimes it can produce some hard to interpret results. My aim for this post is to start things off with a refresher on the basics of the math behind the Fourier transformation, and lay the foundation for future posts that will go into more detail on how the Fourier transform should be used and interpreted.
Covid-19: Norway investigates 23 deaths in frail elderly patients after vaccination Doctors in Norway have been told to conduct more thorough evaluations of very frail elderly patients in line to receive the Pfizer BioNTec vaccine against covid-19, following the deaths of 23 patients shortly after receiving the vaccine. “It may be a coincidence, but we aren’t sure,” Steinar Madsen, medical director of the Norwegian Medicines Agency (NOMA), told The BMJ. “There is no certain connection between these deaths and the vaccine.” The agency has investigated 13 of the deaths so far and concluded that common adverse reactions of mRNA vaccines, such as fever, nausea, and diarrhoea, may have contributed to fatal outcomes in some of the frail patients. “There is a possibility that these common adverse reactions, that are not dangerous in fitter, younger patients and are not unusual with vaccines, may aggravate underlying disease in the elderly,” Madsen said.
EuroMillions Advance Purchase Changes The number of draws for which you can buy EuroMillions lottery tickets in advance is currently four, and this will reduce further from this Saturday due to the impending launch of the new Tuesday EuroMillions game on Tuesday 10 May. From Saturday 16 April, you will only be able to buy tickets for up to three draws in advance, and then for up to two and just one draw in advance from subsequent Saturdays. Then, from Saturday 7 May, you will once again be able to buy tickets for multiple draws in advance, including the new Tuesday draws. Tuesday's Estimated Jackpot is: €210 Million We are looking forward to the new Tuesday EuroMillions games, but in the meantime lottery players across Europe will be keen win a EuroMillions rollover jackpot of around €29 million (around £25 million) this week after no player succeeded in landing the top prize last Friday 8 April.
Time-Domain Periodicity and the Discrete Fourier Transform - Eric Jacobsen Introduction The Discrete Fourier Transform (DFT) and it's fast-algorithm implementation, the Fast Fourier Transform (FFT), are fundamental tools for processing and analysis of digital signals. While the continuous Fourier Transform and its inverse integrate over all time from minus infinity to plus infinity, and all frequencies from minus infinity to plus infinity, practical application of its discrete cousins can only be made over finite time and frequency intervals. The discrete nature and finite support region of the DFT creates effects on the output characteristics that must be understood in order to properly interpret the results. The cyclic nature of the repeating spectrum of sampled signals is fundamental and well understood by most practitioners of signal processing. The "aliasing" behavior of energy sampled in discrete time is conceptually important and can be exploited to significant advantage when properly understood.
unless they are the ones that get passed to future generations Gene editing is one of the scarier things in the science news, but not all gene editing is the same. It matters whether researchers edit “somatic” cells or “germline” cells. Germline cells are the ones that propogate into an entire organism – either cells that make sperm and eggs (known as germ cells), or the cells in an early embryo that will later differentiate into different functions. What’s critical about those particular cells is that a change or mutation in one will go on to affect every cell in the body of a baby that grows from them. That’s why scientists are calling for a moratorium on editing the genes of germ cells or germline cells. Expert suggests huge 82 per cent plunge in cases in just six weeks could be down to herd immunity What is 'herd immunity'? Herd immunity is the indirect protection from an infectious disease that happens when a population is immune either through vaccination or immunity developed through previous infection. Effectively, it means that once people have some form of immunity, it reduces the ability of a disease to spread among the population.
Randomness Applied usage in science, mathematics and statistics recognizes a lack of predictability when referring to randomness, but admits regularities in the occurrences of events whose outcomes are not certain. For example, when throwing two dice and counting the total, we can say that a sum of 7 will randomly occur twice as often as 4. This view, where randomness simply refers to situations where the certainty of the outcome is at issue, applies to concepts of chance, probability, and information entropy.