20 tonnes de poissons échoués Un évènement inhabituel est survenu mardi sur le littoral de la Norvège. Des milliers de poissons, des harengs, se sont échoués massivement sur la berge a indiqué l'Institut norvégien de recherches marines. Selon des médias norvégiens, la quantité de poissons échoués est évaluée à près de vingt tonnes. Ils ont été trouvés près d'une petite localité du nord du pays. Selon Ole Kristian Berg de l'Université norvégienne de sciences et de technologie de Trondheim, les échouages de poisson ont déjà été observés, mais jamais à une telle échelle. Phénomène naturel? Selon le spécialiste, ces poissons auraient pu avoir été pourchassés par des prédateurs, tels que des mammifères marins. Selon la municipalité de Nordreisa, une grande partie des poissons échoués ont maintenant été emportés par les nouvelles marées. Un phénomène similaire s'était produit en janvier 2011 en Arkansas.
Is radix sort faster than quicksort for integer arrays? discussion at reddit There are plenty of misconceptions and confusion over radix sort on the internet. The wikipedia article is messy and unclear, and focuses more on trying to explain the philosophy (for lack of a better word) than the characteristics and capabilities of radix sort. American Flag Sort Worst case performance: O(kN) Worst case space complexity: O(k log N) In Engineering radix sort McIlroy et al. discusses how radix sort can be used successfully to sort arrays of strings, using the American Flag Sort variant. The algorithm can be adapted into a high performance sort algorithm for integers, as shown by Birkeland in Searching large data volumes with MISD processing. Implementation The implementation proved to be surprisingly simple. “The troubles with radix sort are inimplementation, not in conception” - McIlroy et al. (1993) The complexity is O(kN) with k = 4 for 32-bit integers. Benchmark sort Hardware: Language options: C++: -O3 radix.cc -o radix Java: -Xmx10G Arrays.sort
Real Farmville: iPad Game Would Let Pigs Play with Humans | Science News Five Predictions For The Future Of Energy It seems like a new prediction pops up for how we will use renewable energy in the coming decades every day. Will we be using all solar in two years? In five? Prediction: Solar Energy Will Be More Economical Than Fossil Fuels In 10 Years So says the Institute of Electrical and Electronic Engineers (IEEE). Prediction: Solar Power Will Be As Cheap As Coal in Two Years No need to wait a decade--the researchers over at Bloomberg New Energy Finance think that solar power could reach grid parity (the point at which solar is as cheap for utilities as fossil fuels) in the next two years. Prediction: Natural Gas Will Kill Renewables Natural gas produced from shale will kill the economics of renewable energy in the coming years, according to a report from Reuters. Prediction: Renewable Energy Use Will Grow, But So Will Coal And Natural Gas Use The good news: The International Energy Association believes that renewable energy will grow from 8% of total energy use in 2009 to 13% in 2035.
Shark Swallows Another Shark Whole algorithm - In-Place Radix Sort Synthetic biology and the rise of the 'spider-goats' | Science News How Speeding The "Most Important Algorithm Of Our Lifetime" Could Change This Modern World Last week at the Association for Computing Machinery's Symposium on Discrete Algorithms (SODA) a new way of calculating Fast Fourier Transforms was presented by a group of MIT researchers. It's possible that under certain situations it may be up to ten times faster than the current way we do these. At this point you are probably wondering: What the hell is he talking about? Let me explain, because improving these three little letters--FFT--may change your life. Here's a quickie explainer: Fourier transforms are a mathematical trick to simplify how you represent a complicated signal--say the waves of sound made by speaking. How so? Now, you should remember that sound waves, and both picture and video signals, are all handled by processors in your TV, PC, and phone, and that the radio waves that whizz through the air to keep us all connected to the Internet need digital processing too. So calculating FFTs up to ten times faster is a big deal. [Image: Flickr user hazure]
10 Amazing Tales of Alien Abduction - Oddee.com (alien abduction, martians...) Are alien life forms visiting Earth and performing experiments upon unwitting human victims? This is one of the world's greatest mysteries! Read on to discover ten of the most famous and astounding cases of alien abduction ever documented. The Allagash Waterway Abduction One of the most famous cases of alien abduction is The Allagash Waterway Abduction, which took place in Maine in 1976. The object began to change colors before their eyes, and one of the men used a flashlight to signal to it. The men returned home, but soon all four were haunted by nightmares in which they remembered being experimented on by aliens in a space craft. All four men received separate hypnosis sessions, but their stories were all exactly the same. Betty Andreasson taken aboard the mother ship On January 25, 1967, homemaker Betty Andreasson and her family were astounded when the electricity in their home suddenly went out and a bright red light shined in through their kitchen window.
Burstsort Burstsort algorithms use a trie to store prefixes of strings, with growable arrays of pointers as end nodes containing sorted, unique, suffixes (referred to as buckets). Some variants copy the string tails into the buckets. As the buckets grow beyond a predetermined threshold, the buckets are "burst", giving the sort its name. A burstsort derivative (C-burstsort), faster than burstsort: Cache-Efficient String Sorting Using CopyingThe data type used in burstsort: Burst Tries: A Fast, Efficient Data Structure for String KeysEfficient Trie-Based Sorting of Large Sets of StringsEngineering Burstsort: Towards Fast In-Place String SortingA burstsort implementation in C++: Free C++ Copy-Burstsort LibraryA burstsort implementation in Java: burstsort4jJudy arrays are a type of copy burstsort: C implementation
'Spooky action at distance' in particle physics? | Science News Technology areas to watch in 2012 through 2016 1. Energy Revolution - Mass produced fission, fusion, and maybe cold fusion 2. Memristors and other significant computing and electronic improvements. 3. Robotics 4. Urbanization Broad Group skyscrapers, Tata flat packed buildings 5. The most controversial has the highest potential impact 1. There is the highly controversial possibility of Rossi-Focardi Energy catalyzer. Brillouin Energy is another cold fusion contender There is also work in this area by Brian Ahern and NASA and other agencies are investigating it. EMC2 Fusion, Lawrenceville Plasma Physics, General Fusion and/or Tri-alpha energy could develop a first full scale prototype commercial system by Dec, 2016. A desktop high frequency fusion system has been proposed for space propulsion and energy generation. In Chapman’s aneutronic fusion reactor scheme, a commercially available benchtop laser starts the reaction. High frequency lasers are an area that is rapidly progressing. 2. 3. It uses a smartphone or a tablet as its head. 4.
7 Most Extreme Paths El Caminito Del Rey (Spain) Adrenaline-junkies have been flocking to southern Spain to experience the 110-year-old El Caminito Del Rey. And you don't need to be an experienced climber either, the only requirements are that walkers should be at least twelve years old and have a good head for heights. The trail, also known as the King's Pathway, was originally built in 1905 for workers to travel between two hydroelectric power plants but was closed-off in 2000 after two walkers fell to their deaths. Huashan Cliffside Path (China) Huashan is located near the southeast corner of the Ordos Loop section of the Yellow River basin, south of the Wei River valley, at the eastern end of the Qinling Mountains, in southern Shaanxi province. The inherent danger of many of the exposed, narrow pathways with precipitous drops gave the mountain a deserved reputation for danger. School 5,000ft Cliff Path (China) Roche Veyrand (France) Ebenalp Path (Switzerland) Yueyang's New Paths (China)
LAPD Drops Google Apps Plan Computerworld - After more than two years of work, the city of Los Angeles last month abandoned plans to migrate its police operations to Google's hosted email and office applications because it says the service can't meet FBI security requirements. The city council last month voted to amend a 2009 contract calling for Computer Sciences Corp. (CSC) to undertake a wholesale replacement of the city's GroupWise email system with Google's email and collaboration services. The amended pact cuts the Los Angeles Police Department and its nearly 13,000 employees out of the project; other agencies will continue the migration to Google Apps for Government. The vote came last month after the city's chief legislative analyst, Gerry Miller, and its chief administrative officer, Miguel Santana, determined that the Google service could not be brought into compliance with the FBI's Criminal Justice Information Systems (CJIS).