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Dictionary Learning Strategies for Compressed Fiber Sensing Using a Probabilistic Sparse Model
Weiss, Christian, Zoubir, Abdelhak M.
We present a sparse estimation and dictionary learning framework for compressed fiber sensing based on a probabilistic hierarchical sparse model. To handle severe dictionary coherence, selective shrinkage is achieved using a Weibull prior, which can be related to non-convex optimization with $p$-norm constraints for $0 < p < 1$. In addition, we leverage the specific dictionary structure to promote collective shrinkage based on a local similarity model. This is incorporated in form of a kernel function in the joint prior density of the sparse coefficients, thereby establishing a Markov random field-relation. Approximate inference is accomplished using a hybrid technique that combines Hamilton Monte Carlo and Gibbs sampling. To estimate the dictionary parameter, we pursue two strategies, relying on either a deterministic or a probabilistic model for the dictionary parameter. In the first strategy, the parameter is estimated based on alternating estimation. In the second strategy, it is jointly estimated along with the sparse coefficients. The performance is evaluated in comparison to an existing method in various scenarios using simulations and experimental data.
Why Intel Is Tweaking Xeon Phi For Deep Learning
If there is anything that chip giant Intel has learned over the past two decades as it has gradually climbed to dominance in processing in the datacenter, it is ironically that one size most definitely does not fit all. As the tight co-design of hardware and software continues in all parts of the IT industry, we can expect fine-grained customization for very precise – and lucrative – workloads, like data analytics and machine learning, just to name two of the hottest areas today. Software will run most efficiently on hardware that is tuned for it, although we are used to thinking of that process in a mirror image, where programmers tweak their code to take advantage of the forward-looking features a chip maker conceives of four or five years before they are etched into its transistors and delivered as a product. The competition is fierce these days, and Intel has to move fast if it is to keep its compute hegemony in the datacenter. That is why at the Intel Developer Forum in San Francisco the company put a new path on the Knights family of many-core processors that will see the company deliver a version of this chip specifically tuned for machine learning workloads.
How Artificial Intelligence Is Helping Enhance Human Capabilities
In the past half decade, artificial intelligence and machine learning have made significant leaps into the mainstream and into our daily lives. According to research firm Markets and Markets, the artificial intelligence market is set to grow to 5.05 billion by 2020 thanks to the increased applicability of various AI technologies into everything from finance to healthcare to retail. Today, doctors can diagnose Sepsis with an AI algorithm, for instance, and researchers can track endangered species through AI-enhanced photo capture systems. Clearly, these new self-learning and ever-improving technologies have limitless potential in a number of innovative industries. The U.S. Chamber of Commerce's Technology Engagement Center (C_TEC) recently hosted a panel discussion during its TecNation 2016 event that focused on where we stand with Artificial Intelligence and how it will affect our lives and unlock our potential in the long run.
Artificial intelligence: Why we should be worried
Ever since the field of artificial intelligence research was founded at a conference at Dartmouth College in 1956, it has undergone a rapid expansion of applications to a multitude of other fields and subjects. Starting off originally as a way to compute mathematical equations, artificial intelligence is now used in everyday items on a regular basis. This technology can be seen through obvious examples, such as Siri on your iPhone, characters in video games and in the currently developing technology that will power smart cars. It is also prevalent in more subliminal cases, like fraud detection on your credit card, news generation by popular information outlets like Yahoo! or Fox, purchase prediction on Amazon or recommended viewings on Netflix. Perhaps one of the most popular examples of A.I. technology today is IBM's supercomputer, otherwise known as Watson, which appeared on a special addition of Jeopardy! in 2011.
US Army 'Will Have More Robot Soldiers Than Humans' By 2025, Says Former British Spy - Slashdot
John Bassett, a British spy who worked for the agency GCHQ for nearly two decades, has told Daily Express that the U.S. was considering plans to employ thousands of robots by 2025. At a meeting with police and counter-terrorism officials in London, he said: "At some point around 2025 or thereabouts the U.S. army will actually have more combat robots than it will have human soldiers. Many of those combat robots are trucks that can drive themselves, and they will get better at not falling off cliffs. But some of them are rather more exciting than trucks. So we will see in the West combat robots outnumber human soldiers."
WVU experts claim mind controlled computers are just a decade away
The first computers cost millions of dollars and were locked inside rooms equipped with special electrical circuits and air conditioning. The only people who could use them had been trained to write programs in that specific computer's language. Today, gesture-based interactions, using multitouch pads and touchscreens, and exploration of virtual 3D spaces allow us to interact with digital devices in ways very similar to how we interact with physical objects. Multitouch pads and touchscreens recognize movements of fingers on a surface, while devices such as the Wii and Kinect recognize movements of arms and legs. Frances Van Scoy says this is bringing us closer to towards'computing at the speed of thought' A professor at West Virginia University believes her research is helping to move us toward what might be called'computing at the speed of thought.' Frances Van Scoy says low-cost open-source projects such as OpenBCI allow people to assemble their own neuroheadsets that capture brain activity noninvasively.
Tesla says it will roll out Uber-style ride services program
Tesla is planning to roll out a ride services program and will announce details next year, the luxury electric vehicle maker said on its website, a service first outlined by Chief Executive Elon Musk in his master plan in July. News of the Tesla Network was in a disclaimer about the self-driving functionality on new Model S vehicles. However, it bans owners from signing their car up to services from Uber, Lyft and others. News of the Tesla Network was in a disclaimer about the self-driving functionality on new Model S vehicles. 'Please note that using a self-driving Tesla for car sharing and ride hailing for friends and family is fine, but doing so for revenue purposes will only be permissible on the Tesla Network, details of which will be released next year,' read the disclaimer.
Facts you must know about the Internet of Things
In today's world we are witnessing how the Internet of Things is expanding rapidly and how it is here to stay. The Internet of Thing (IoT), or as some prefer it, the Internet of Everything (IoE), is the reference to various objects or devices that are connected to the expanding global network known as the Internet. From simple devices like the smartwatch you just purchased, your refrigerator, or even your car. As technology has grown and the world is becoming ever so intertwined and interconnected, such devices have been blueprinted, built and programmed to collect and send any and all data through the Internet. And imagine the amount of data is being compiled by these devices as they continue to contribute to what many are describing as our "big data world."
Sleep: Difference between revisions - Wikipedia
Sleep is a naturally recurring state of mind and body characterized by altered consciousness, relatively inhibited sensory activity, inhibition of nearly all voluntary muscles, and reduced interactions with surroundings.[1] It is distinguished from wakefulness by a decreased ability to react to stimuli, but is more easily reversed than the state of hibernation or of being comatose. Mammalian sleep occurs in repeating periods, in which the body alternates between two highly distinct modes known as non-REM and REM sleep. REM stands for "rapid eye movement" but involves many other aspects including virtual paralysis of the body. During sleep, most systems in an animal are in an anabolic state, building up the immune, nervous, skeletal, and muscular systems. Sleep in non-human animals is observed in mammals, birds, reptiles, amphibians, and some fish, and, in some form, in insects and even in simpler animals such as nematodes. The internal circadian clock promotes sleep daily at night in diurnal organisms (such as humans) and in the day in nocturnal organisms (such as rodents). However, sleep patterns vary among individual humans and even more widely among other species. In the last century, artificial light has in many areas of the world substantially altered sleep timing among both humans and many other species.[2] The diverse purposes and mechanisms of sleep are the subject of substantial ongoing research.[3] Sleep seems to assist animals with improvements in the body and mind. A well-known feature of sleep in humans is the dream, an experience typically recounted in narrative form, which resembles waking life while in progress, but which usually can later be distinguished as fantasy. Sleep is sometimes confused with unconsciousness, but is quite different in terms of thought process. Humans may suffer from a number of sleep disorders. These include dyssomnias (such as insomnia, hypersomnia, and sleep apnea), parasomnias (such as sleepwalking and REM behavior disorder), bruxism, and the circadian rhythm sleep disorders. In mammals and birds, sleep is divided into two broad types: rapid eye movement (REM sleep) and non-rapid eye movement (NREM or non-REM sleep). Each type has a distinct set of physiological and neurological features associated with it. REM sleep is associated with dreaming, desynchronized and faster brain waves, loss of muscle tone,[4] and suspension of homeostasis[citation needed]. REM and non-REM sleep are so different that physiologists classify them as distinct behavioral states. In this view, REM, non-REM, and waking represent the three major modes of consciousness, neural activity, and physiological regulation.[5] According to the Hobson & McCarley activation-synthesis hypothesis, proposed in 1975–1977, the alternation between REM and non-REM can be explained in terms of cycling, reciprocally influential neurotransmitter systems.[6]
WhatsApp update lets people write and draw on their pictures, taking one Snapchat's most fun features
WhatsApp just got updated, with a huge range of new camera features for people to play with. And they are primarily meant playfully – the new features include tools that let you draw on pictures before they sent, and allow you to add emoji to your pictures. They also include a new way of adding people to group conversations that will come as a saviour for anyone who's used WhatsApp to organise anything. The new camera features were previously announced and work incredibly similarly to Snapchat. The robot developed by Seed Solutions sings and dances to the music during the Japan Robot Week 2016 at Tokyo Big Sight.