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Knuth Previews New Math Section For 'The Art of Computer Programming' ( 64

In 1962, 24-year-old Donald Knuth began writing The Art of Computer Programming -- and 55 years later, he's still working on it. An anonymous reader quotes Knuth's web site at Stanford: Volume 4B will begin with a special section called 'Mathematical Preliminaries Redux', which extends the 'Mathematical Preliminaries' of Section 1.2 in Volume 1 to things that I didn't know about in the 1960s. Most of this new material deals with probabilities and expectations of random events; there's also an introduction to the theory of martingales.

You can have a sneak preview by looking at the current draft of pre-fascicle 5a (52 pages), last updated 18 January 2017. As usual, rewards will be given to whoever is first to find and report errors or to make valuable suggestions. I'm particularly interested in receiving feedback about the exercises (of which there are 125) and their answers (of which there are 125).

Over the years Knuth gave out over $20,000 in rewards, though most people didn't cash his highly-coveted "hexadecimal checks", and in 2008 Knuth switched to honorary "hexadecimal certificates". In 2014 Knuth complained about the "dumbing down" of computer science history, and his standards remain high. In his most-recent update, 79-year-old Knuth reminds readers that "There's stuff in here that isn't in Wikipedia yet!"

Scientists Enter Hawaii Dome In Eight-Month Mars Space Mission Study ( 86

An anonymous reader quotes a report from Reuters: Six scientists have entered a dome perched atop a remote volcano in Hawaii where they will spend the next eight months in isolation to simulate life for astronauts traveling to Mars, the University of Hawaii said. The study is designed to help NASA better understand human behavior and performance during long space missions as the U.S. space agency explores plans for a manned mission to the Red Planet. The crew will perform geological field work and basic daily tasks in the 1,200-square-foot (365 m) dome, located in an abandoned quarry 8,000 feet (2.5 km) above sea level on the Mauna Loa volcano on Hawaii's Big Island. There is little vegetation and the scientists will have no contact with the outside world, said the university, which operates the dome. Communications with a mission control team will be time-delayed to match the 20-minute travel time of radio waves passing between Earth and Mars. "Daily routines include food preparation from only shelf-stable ingredients, exercise, research and fieldwork aligned with NASA's planetary exploration expectations," the university said. The project is intended to create guidelines for future missions to Mars, some 35 million miles (56 million km) away, a long-term goal of the U.S. human space program. The NASA-funded study, known as the Hawaii Space Exploration Analog and Simulation (Hi-SEAS), is the fifth of its kind.

NASA Is Planning Mission To An Asteroid Worth $10 Quintillion ( 277

New submitter kugo2006 writes: NASA announced a plan to research 16 Psyche, an asteroid potentially as large as Mars and primarily composed of Iron and Nickel. The rock is unique in that it has an exposed core, likely a result of a series of collisions, according to Lindy Elkins-Tanton, Psyche's principal investigator. The mission's spacecraft would launch in 2023 and arrive in 2030. According to Global News, Elkins-Tanton calculates that the iron in 16 Psyche would be worth $10,000 quadrillion ($10 quintillion).
The Almighty Buck

The Mind-Reading Gadget For Dogs That Got Funded, But Didn't Get Built ( 62

the_newsbeagle writes: Crowdfunding campaigns that fail to deliver may be all too common, but some flameouts merit examination. Like this brain-scanning gadget for dogs, which promised to translate their barks into human language. It's not quite as goofy as it sounds: The campaigners planned to use standard EEG tech to record the dogs' brainwaves, and said they could correlate those electrical patterns with general states of mind like excitement, hunger, and curiosity. The campaign got a ton of attention in the press and raised twice the money it aimed for. But then the No More Woof team seemed to vanish, leaving backers furious. This article explains what went wrong with the campaign, and what it says about the state of neurotech gadgets for consumers.

Uber Hires Former Google Search Chief Amit Singhal As SVP of Engineering ( 26

The former Senior Vice President of Search and employee number 176 at Google has joined the ride-hailing company Uber as SVP of Engineering. TechCrunch is reporting that "Singhal will be heading up the Maps and Marketplace departments at Uber, while also advising CEO Travis Kalanick and Uber VP of Engineering and Otto co-founder Anthony Levandowski on their efforts to build out the company's self-driving technology." From the report: The last time we in tech news circles heard from Singhal, he was saying goodbye after a 15-year career at Google, in a farewell letter that felt a lot like a retirement announcement. Singhal wrote that he was leaving to "see what kind of impact [he could] make philanthropically" and to"spend more time with [his] family," in an effort to "define [his] next fifteen years." Now, a little under a year later, Singhal is back in an executive role -- this time at a much younger company, but still at one of the most influential technology firms in the world. So how did Singhal get from there to here? Well, for starters, Singhal did throw himself into philanthropic pursuits, focusing on the Singhal Foundation established by him and his wife Shipa, which aims to deliver access to high quality education for kids who normally wouldn't be able to attend top schools, and which began with a focus on the city of Jodhpur, in India. Singhal met Travis Kalanick through a mutual friend, which sparked a series of conversations between the search expert and the famous founder about Uber, its goals and its technical challenges. The combination of the scope of both Uber's potential impact, and the extent of the engineering hurdles it faces in achieving its aims were what drew Singhal in; he is, after all, a true engineer at heart, and mountainous technical challenges attract skilled engineers like nothing else. "This company is not only doing things that are amazing, this company also has some of the toughest computer science challenges that I have seen in my career of 25 years," Singhal told me. "Those computer science challenges for a computer science geek are just intriguing -- you give a geek a puzzle, they can't drop it; they need to solve the puzzle. That's how it felt to me."

New Senate Bill Would Give US Grads Preference In Receiving H-1B Visas ( 212

dcblogs quotes a report from Computerworld: A new bill in Congress would give foreign students who graduate from U.S. schools priority in getting an H-1B visa. The legislation also "explicitly prohibits" the replacement of American workers by visa holders. This bill, the H-1B and L-1 Visa Reform Act, was announced Thursday by its co-sponsors, U.S. Senators Chuck Grassley (R-Iowa) and Sen. Dick Durbin (D-Ill.), longtime allies on H-1B reform. Grassley is chairman of the Senate Judiciary Committee, which gives this bill an immediate big leg up in the legislative process. This legislation would end the annual random distribution, via a lottery, of H-1B visas, and replace it with a system to give priority to certain types of students. Foreign nationals in the best position to get one of the 85,000 H-1B visas issued annually will have earned an advanced degree from a U.S. school, have a well-paying job offer, and have preferred skills. The specific skills weren't identified, but will likely be STEM-related. "Congress created these programs to complement America's high-skilled workforce, not replace it," said Grassley, in a statement. "Unfortunately, some companies are trying to exploit the programs by cutting American workers for cheaper labor."

Elite Scientists Have Told the Pentagon That AI Won't Threaten Humanity ( 144

An anonymous reader quotes a report from Motherboard: A new report authored by a group of independent U.S. scientists advising the U.S. Dept. of Defense (DoD) on artificial intelligence (AI) claims that perceived existential threats to humanity posed by the technology, such as drones seen by the public as killer robots, are at best "uninformed." Still, the scientists acknowledge that AI will be integral to most future DoD systems and platforms, but AI that could act like a human "is at most a small part of AI's relevance to the DoD mission." Instead, a key application area of AI for the DoD is in augmenting human performance. Perspectives on Research in Artificial Intelligence and Artificial General Intelligence Relevant to DoD, first reported by Steven Aftergood at the Federation of American Scientists, has been researched and written by scientists belonging to JASON, the historically secretive organization that counsels the U.S. government on scientific matters. Outlining the potential use cases of AI for the DoD, the JASON scientists make sure to point out that the growing public suspicion of AI is "not always based on fact," especially when it comes to military technologies. Highlighting SpaceX boss Elon Musk's opinion that AI "is our biggest existential threat" as an example of this, the report argues that these purported threats "do not align with the most rapidly advancing current research directions of AI as a field, but rather spring from dire predictions about one small area of research within AI, Artificial General Intelligence (AGI)." AGI, as the report describes, is the pursuit of developing machines that are capable of long-term decision making and intent, i.e. thinking and acting like a real human. "On account of this specific goal, AGI has high visibility, disproportionate to its size or present level of success," the researchers say.

Galileo Satellites Are Experiencing Multiple Clock Failures ( 188

elgatozorbas writes: According to a BBC article, the onboard atomic clocks that drive the satellite-navigation signals on Europe's Galileo network have been failing at an alarming rate. From the report: "Across the 18 satellites now in orbit, nine clocks have stopped operating. Three are traditional rubidium devices; six are the more precise hydrogen maser instruments that were designed to give Galileo superior performance to the American GPS network. Each Galileo satellite carries two rubidium and two hydrogen maser clocks. The multiple installation enables a satellite to keep working after an initial failure. All 18 spacecraft currently in space continue to operate, but one of them is now down to just two clocks. Most of the maser failures (5) have occurred on the satellites that were originally sent into orbit to validate the system, whereas all three rubidium stoppages are on the spacecraft that were subsequently launched to fill out the network. Esa staff at its technical centre, ESTEC, in the Netherlands are trying to isolate the cause the of failures - with the assistance of the clock (Spectratime of Switzerland) and satellite manufacturers (Airbus and Thales Alenia Space; OHB and SSTL). It is understood engineers have managed to restart another hydrogen clock that had stopped. It appears the rubidium failures 'all seem to have a consistent signature, linked to probable short circuits, and possibly a particular test procedure performed on the ground.'"

Neuroscience Can't Explain How a Microprocessor Works ( 163

mspohr writes: The Economist has an interesting story about two neuroscientists/engineers -- Eric Jonas of the University of California, Berkeley, and Konrad Kording of Northwestern University, in Chicago -- who decided to test the methods of neuroscience using a 6502 processor. Their results are published in the PLOS Computational Biology journal. Neuroscientists explore how the brain works by looking at damaged brains and monitoring inputs and outputs to try to infer intermediate processing. They did the same with the 6502 processor which was used in early Atari, Apple and Commodore computers. What they discovered was that these methods were sorely lacking in that they often pointed in the wrong direction and missed important processing steps.

Scottish Government Targets 66% Emissions Cut By 2032 ( 62

An anonymous reader quotes a report from BBC: The Scottish government has outlined a new target of reducing greenhouse gas emissions by 66% by 2032. Climate Change Secretary Roseanna Cunningham set out the government's draft climate change plan for the next 15 years at Holyrood. She also targeted a fully-decarbonized electricity sector and 80% of domestic heat coming from low-carbon sources. Ministers committed last year to cut harmful CO2 emissions by 80% by 2050, with a new interim target of 50% by 2020. The previous interim target of 42% was met in 2014 -- six years early. However, the independent Committee on Climate Change said the decrease was largely down to a warmer than average winter reducing the demand for heating. Ms Cunningham said the new targets demonstrated "a new level of ambition" to build a low-carbon economy and a healthier Scotland. Goals to be achieved by 2032 include: Cutting greenhouse emissions by 66%; A fully-decarbonized electricity sector; 80% of domestic heat to come from low-carbon heat technologies; Proportion of ultra-low emission new cars and vans registered in Scotland annually to hit 40%; 250,000 hectares of degraded peatlands restored; Annual woodland creation target increased to at least 15,000 hectares per year. The 172-page document sets a road map for decarbonizing Scotland. The aim -- although not new -- is to reduce greenhouse gas emissions by two thirds by 2032. Among the policies are making half of Scotland's buses low-carbon, full-decarbonizing the electricity sector and making 80% of homes heated by low-carbon technologies.

Sitting Too Much Ages You By 8 Years ( 144

Sitting too much during the day has been linked to a host of diseases, from obesity to heart problems and diabetes, as well as early death. It's not hard to understand why: being inactive can contribute to weight gain, which in turn is a risk factor for heart attack, stroke, hypertension and unhealthy blood sugar levels. On top of everything else, sitting has detrimental effects on cells at the biological level, according to a new report published in the American Journal of Epidemiology. From a report on Time: In the new study, scientists led by Aladdin Shadyab, a post-doctoral fellow in family medicine and public health at the University of California San Diego, traced sitting's impact on the chromosomes. They took blood samples from nearly 1,500 older women enrolled in the Women's Health Initiative, a long-term study of chronic diseases in post-menopausal women, and focused on the telomeres: the tips of the tightly packed DNA in every cell. Previous studies have found that as cells divide and age, they lose bits of the telomeres, so the length of this region can be a marker for how old a cell (and indirectly the person the cells belong to) is. The researchers compared telomere length to how much the women exercised, to see if physical activity affected aging.

How the Human Brain Decides What Is Important and What's Not ( 63

New submitter baalcat writes: A new study reported by Neuroscience News sheds light on how we learn to pay attention in order to make the most of our life experiences. From the report: "The Wizard of Oz told Dorothy to 'pay no attention to that man behind the curtain' in an effort to distract her, but a new Princeton University study sheds light on how people learn and make decisions in real-world situations. The findings could eventually contribute to improved teaching and learning and the treatment of mental and addiction disorders in which people's perspectives are dysfunctional or fractured. Participants in the study performed a multidimensional trial-and-error learning task, while researchers scanned their brains using functional magnetic resonance imaging (fMRI). The researchers found that selective attention is used to determine the value of different options. The results also showed that selective attention shapes what we learn when something unexpected happens. For example, if your pizza is better or worse than expected, you attribute the learning to whatever your attention was focused on and not to features you decided to ignore. Finally, the researchers found that what we learn through this process teaches us what to pay attention to, creating a feedback cycle -- we learn about what we attend to, and we attend to what we learned high values for. 'If we want to understand learning, we can't ignore the fact that learning is almost always done in a multidimensional 'cluttered' environment,' says senior author Yael Niv, an associate professor in psychology and the Princeton Neuroscience Institute. 'We want kids to listen to the teacher, but a lot is going on in the classroom -- there is so much to look at inside it and out the window. So, it's important to understand how exactly attention and learning interact and how they shape each other.'" The study has been published in the journal Neuron.

China Cancels Over 100 Coal-Fired Power Plants ( 273

In an effort to improve air quality, the Chinese government has canceled over 100 coal-fired power plants in 11 provinces -- totaling a combined installed capacity of more than 100 gigawatts. Reuters reports: In a document issued on Jan. 14, financial media group Caixin reported, the National Energy Administration (NEA) suspended the coal projects, some of which were already under construction. The projects worth some 430 billion yuan ($62 billion) were to have been spread across provinces and autonomous regions including Xinjiang, Inner Mongolia, Shanxi, Gansu, Ningxia, Qinghai, Shaanxi and other northwestern areas. Putting the power projects on hold is a major step towards the government's effort to produce power from renewable sources such as solar and wind, and wean the country off coal, which accounts for the majority of the nation's power supply. To put it in perspective, some 130 GW of additional solar and wind power will be installed by 2020, equal to France's total renewable power generation capacity, said Frank Yu, principal consultant at Wood Mackenzie. "This shows the government is keeping its promise in curbing supplies of coal power," Yu said. Some of the projects will still go ahead, but not until 2025 and will likely replace outdated technology, he said.

Female Shark Learns To Reproduce Without Males After Years Alone ( 157

An anonymous reader quotes a report from New Scientist: A female shark separated from her long-term mate has developed the ability to have babies on her own. Leonie the zebra shark (Stegostoma fasciatum) met her male partner at an aquarium in Townsville, Australia, in 1999. They had more than two dozen offspring together before he was moved to another tank in 2012. From then on, Leonie did not have any male contact. But in early 2016, she had three baby sharks. Intrigued, Christine Dudgeon at the University of Queensland in Brisbane, Australia, and her colleagues began fishing for answers. One possibility was that Leonie had been storing sperm from her ex and using it to fertilize her eggs. But genetic testing showed that the babies only carried DNA from their mum, indicating they had been conceived via asexual reproduction. Some vertebrate species have the ability to reproduce asexually even though they normally reproduce sexually. These include certain sharks, turkeys, Komodo dragons, snakes and rays. However, most reports have been in females who have never had male partners. In sharks, asexual reproduction can occur when a female's egg is fertilized by an adjacent cell known as a polar body, Dudgeon says. This also contains the female's genetic material, leading to "extreme inbreeding", she says. "It's not a strategy for surviving many generations because it reduces genetic diversity and adaptability." Nevertheless, it may be necessary at times when males are scarce. "It might be a holding-on mechanism," Dudgeon says. "Mum's genes get passed down from female to female until there are males available to mate with." It's possible that the switch from sexual to asexual reproduction is not that unusual; we just haven't known to look for it, Dudgeon says.

Robotic Sleeve Mimics Muscles To Keep a Heart Beating ( 41

randomErr writes: 5.7 million adults in the United States have heart failure each year with about 41 million worldwide. Currently, treatment involves surgically implanting a mechanical pump, called a ventricular assist device (VAD), into the heart. The VAD helps maintains the heart's function. But patients with VADs are at high risk for getting blood clots and having a stroke. Researchers at Harvard University and Boston Children's Hospital have created a soft robotic sleeve that doesn't have to be implanted. The robotic sleeve slips around the outside of the heart, squeezing it in sync with the natural rhythm. "This work represents an exciting proof of concept result for this soft robot, demonstrating that it can safely interact with soft tissue and lead to improvements in cardiac function," Conor Walsh, said in a press statement. Seeker reports: "The sleeve they developed is made from thin silicone and attaches to the outside of the heart with a combination of suction devices and sutures. It relies on soft, air-powered actuators that twist and compress in a way that's similar to the outer layer of muscle of a human heart. A gel coating reduces any friction between the sleeve and the organ. Because the sleeve is soft and flexible, it can be customized to fit not just the size and shape of individual hearts, but augment the organ's weaknesses. For example, if a patient's heart is weaker on the left side than the right, the sleeve can be tuned to squeeze with more authority on the left side. As the organ gains strength, the device can be adjusted." The study has been published in the journal Science Translational Medicine.
Desktops (Apple)

Malwarebytes Discovers 'First Mac Malware of 2017' ( 60

wiredmikey writes: Security researchers have a uncovered a Mac OS based espionage malware they have named "Quimitchin." The malware is what they consider to be "the first Mac malware of 2017," which appears to be a classic espionage tool. While it has some old code and appears to have existed undetected for some time, it works. It was discovered when an IT admin noticed unusual traffic coming from a particular Mac, and has been seen infecting Macs at biomedical facilities. From "Quimitchin comprises just two files: a .plist file that simply keeps the .client running at all times, and the .client file containing the payload. The latter is a 'minified and obfuscated' perl script that is more novel in design. It combines three components, Thomas Reed, director of Mac offerings at Malwarebytes and author of the blog post told SecurityWeek: 'a Mac binary, another perl script and a Java class tacked on at the end in the __DATA__ section of the main perl script. The script extracts these, writes them to /tmp/ and executes them.' Its primary purpose seems to be screen captures and webcam access, making it a classic espionage tool. Somewhat surprisingly the code uses antique system calls. 'These are some truly ancient functions, as far as the tech world is concerned, dating back to pre-OS X days,' he wrote in the blog post. 'In addition, the binary also includes the open source libjpeg code, which was last updated in 1998.' The script also contains Linux shell commands. Running the malware on a Linux machine, Malwarebytes 'found that -- with the exception of the Mach-O binary -- everything ran just fine.' It is possible that there is a specific Linux variant of the malware in existence -- but the researchers have not been able to find one. It did find two Windows executable files, courtesy of VirusTotal, that communicated with the same CC server. One of them even used the same libjpeg library, which hasn't been updated since 1998, as that used by Quimitchin."

Earth Hit Record Hot Year in 2016: NASA ( 266

Earth sizzled to a third-straight record hot year in 2016, government scientists have said. They mostly blame man-made global warming with help from a natural El Nino, which has since disappeared. From a report: Measuring global temperatures in slightly different ways, NASA and the National Oceanic and Atmospheric Administration announced that last year passed 2015 as the hottest year on record. NOAA calculated that the average 2016 global temperature was 14.84 degrees Celsius (58.69 degrees Fahrenheit) -- beating the previous year by 0.04 Celsius (0.07 degrees F). NASA's figures, which include more of the Arctic, are higher at 0.22 degrees (0.12 Celsius) warmer than 2015. The Arctic "was enormously warm, like totally off the charts compared to everything else," said Gavin Schmidt, director of NASA's Goddard Institute of Space Studies in New York, where the space agency monitors global temperatures. Records go back to 1880. This is the fifth time in a dozen years that the globe has set a new annual heat record. Records have been set in 2016, 2015, 2014, 2010 and 2005.

One in Five of Us May 'Hear' Flashes of Light ( 134

One in five people is affected by a synaesthesia-like phenomenon in which visual movements or flashes of light are "heard" as faint sounds, according to scientists. From a report on The Guardian: The findings suggest that far more people than initially thought experience some form of sensory cross-wiring -- which could explain the appeal of flashing musical baby toys and strobed lighting at raves. Elliot Freeman, a cognitive neuroscientist at City University and the study's lead author, said: "A lot of us go around having senses that we do not even recognise." More florid forms of synaesthesia, in which disparate sensory experiences are blended, are found in only about 2-4% of the population. To a synaesthete, the number seven might appear red, or the name Wesley might "taste" like boiled cabbage, for instance. The latest work -- only the second published on the phenomenon -- suggests that many more of us experience a less intrusive version of the condition in which visual movements or flashes are accompanied by an internal soundtrack of hums, buzzes or swooshes. Since movements are very frequently accompanied by sounds in everyday life, the effect is likely to be barely discernible.

NASA Is Making New Robots That Can Control Themselves ( 45

An anonymous reader quotes a report from Motherboard: NASA wants humans and robots to work together as teams. To ensure that, the space agency's autonomous robotics group is currently developing new technology to improve how humans explore the solar system, and how robots can help. When NASA began working with remotely operated robots several years ago, Fong said the scientists needed a piece of software that would allow them to look at terrain and sensor data coming from autonomous robots. That led to the creation of VERVE, a "3D robot user interface," which allows scientists to see and grasp the three-dimensional world of remotely operated robots. VERVE has been used with NASA's K10 planetary rovers (a prototype mobile robot that can travel bumpy terrain), with its K-Rex planetary rovers (robot to determine soil moisture), with SPHERES (Synchronized Position Hold, Engage, Reorient, Experimental Satellites) on the International Space Station (ISS), and with the new robot Astrobee (a robot that can fly around the ISS). In 2013, NASA carried out a series of tests with astronauts on the ISS, during which astronauts who were flying 200 miles above Earth remotely operated the K10 planetary rover in California. Because of time delay, astronauts can't just "joystick a robot," said Maria Bualat, deputy lead of intelligent robotics group at the NASA Ames Research Center. "You need a robot that can operate on its own, complete tasks on its own," she said. "On the other hand, you still want the human in the loop, because the human brings a lot of experience and very powerful cognitive ability that can deal with issues that the autonomy's not quite ready to handle." That's why, according to NASA, human capabilities and robotic capabilities comprise a powerful combination.

AI Can Predict When Patients Will Die From Heart Failure 'With 80% Accuracy' ( 153

New submitter drunkdrone quotes a report from International Business Times: Scientists say they have developed an artificial intelligence (AI) program that is capable of predicting when patients with a serious heart disorder will die with an 80% accuracy rate. Researchers from the MRC London Institute of Medical Sciences (LMS) believe the software will allow doctors to better treat patients with pulmonary hypertension by determining how aggressive their treatment needs to be. The researchers' program assessed the outlook of 250 patients based on blood test results and MRI scans of their hearts. It then used the data to create a virtual 3D heart of each patient which, combined with the health records of "hundreds" of previous patients, allowed it to learn which characteristics indicated fatal heart failure within five years. The LMS scientists claim that the software was able to accurately predict patients who would still be alive after a year around 80% of the time. The computer was able to analyze patients "in seconds," promising to dramatically reduce the time it takes doctors to identify the most at-risk individuals and ensure they "give the right treatment to the right patients, at the right time." Dr Declan O'Regan, one the lead researchers from LMS, said: "This is the first time computers have interpreted heart scans to accurately predict how long patients will live. It could transform the way doctors treat heart patients. The researchers now hope to field-test the technology in hospitals in London in order to verify the data obtained from their trials, which have been published in the medical journal Radiology.

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