More than half a billion users access Facebook only using mobile devices

Are mobile devices a hugely important platform for the digital ecosphere?  Absolutely. TechCrunch.com notes that more than 500 million users access Facebook solely from mobile devices:

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That’s up from 456 million in the previous quarter, and it’s an increase of around 78 percent from the 296 million mobile-only users that Facebook saw during the same period last year. That also represents about 38 percent of Facebook’s 1.39 billion monthly active users.

In all, Facebook reported about 750 million daily active mobile users, and 1.2 billion monthly active mobile users.  Another indication that mobile is indeed a big deal.

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New Horizons space probe reaches Pluto

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NASA’s space craft is closing in on Pluto and is beginning to take its first pictures:

New Horizons is aiming its Long-Range Reconnaissance Imager (LORRI) telescope at Pluto to help navigate the final 135 million miles (220 kilometers) of its 3 billion mile journey. Besides LORRI, the space probe is packed with cameras and other instruments. By mid-May, we should get “better than Hubble” photos. We’ll also see Pluto’s five moons: Charon, Nix, Hydra, Kerberos and Styx.

Stay tuned, as they say…

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Amazon launches a free Kindle textbook creator

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Amazon has launched Kindle Textbook Creator (beta), making it easy for anyone to create electronic textbooks from PDF files and publish them with interactive ebook features. This could be very disruptive for the textbook industry, if enough academics decide to self-publish.

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SpaceX comes close, but doesn’t quite accomplish soft landing of booster rocket

CRS-5 Launch

SpaceX successfully navigated its Falcon 9 booster rocket back to a floating platform Saturday, but the landing was too hard to count as a success.  However, “it bodes well for the future” says Elon Musk.

The rocket “ran out of hydraulic fluid right before landing,” Musk said on Twitter. “Upcoming flight already has 50% more hydraulic fluid, so should have plenty of margin for landing attempt next month.”

The main objective of the mission was a clear success, as the Falcon 9 booster placed a SpaceX Dragon capsule with 5200 pounds of food and equipment on track to rendezvous with the International Space Station.

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SpaceX plans a reusable booster landing test …

… on Saturday.  If all goes well, the SpaceX booster will land on a sea-based autonomous landing platform built from deep sea drilling rig components!

SpaceX landing platform

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2014 in review

The WordPress.com stats helper monkeys prepared a 2014 annual report for this blog.

Here’s an excerpt:

A San Francisco cable car holds 60 people. This blog was viewed about 2,700 times in 2014. If it were a cable car, it would take about 45 trips to carry that many people.

Click here to see the complete report.

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First robot to fly as a paying passenger on an airline

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“Athena”, flying from Germany to Los Angeles.

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Handwriting vs. Typing: The Pen is Still Mightier Than the Keyboard

Photograph: Erhan Dayi/Alamy; The Guardian

Photograph: Erhan Dayi/Alamy; The Guardian

As keyboard typing (or scrawling on a tablet with a clunky stylus) takes over, evidence suggests that learning with old fashioned handwriting provides important cognitive benefits. Typing, in contrast, distracts your brain with the mechanical task of replicating content — making it hard for your brain to summarize and process the material.

 In a paper published in April in the journal Psychological Science, two US researchers, Pam Mueller and Daniel Oppenheimer, claim that note-taking with a pen, rather than a laptop, gives students a better grasp of the subject.

The study focused on more than 300 students at Princeton and the University of California, Los Angeles. It suggested that students who took longhand notes were better able to answer questions on the lecture than those using a laptop. For the scientists, the reason is clear: those working on paper rephrased information as they took notes, which required them to carry out a preliminary process of summarising and comprehension; in contrast, those working on a keyboard tended to take a lot of notes, sometimes even making a literal transcript, but avoided what is known as “desirable difficulty”.

That “desirable difficulty” is otherwise known as learning.  Handwriting, diagramming, or sketching all let your brain process what you’re learning, in a way that typing or watching videos don’t.  (Watching videos coupled with hands on learning does work, in my experience, but the key part for digesting and internalizing information is the hands-on part.)

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Compensation of Top College Presidents

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The Chronicle of Higher Education has released facts and figures on 2012 executive compensation at private colleges.  In 2012, 36 private college presidents earned more than $1 million, with the highest being paid more than $7 million.  I was curious what might determine those high salaries, so I plotted the data for the top 30 highest paid presidents as a function of the institutional expenditures they oversee (as a proxy for the scope of what each president does).  Most of these compensation packages actually fall in a relative tight band between $1 and $2 million, no matter what the level of institutional expenditures (the group includes such varied universities as Yale, NYU, Drexel, and Trinity College).

According to The Chronicle’s data, four extremely well compensated presidents stand out as dramatic outliers: Shirley Jackson (RPI), $7.1M; John Lahey (Quinnipiac), $3.8M; Lee Bollinger (Columbia), $3.4M; and Amy Gutmann (Penn), $2.5M.  For Bollinger, Gutman, and perhaps Lahey one can make some argument for their high level of compensation, but Shirley Jackson at RPI is (almost literally) off the chart.

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NASA’s Pluto-Bound Spacecraft Has Awakened For the Final Leg of Its Journey

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NASA has confirmed that New Horizons, the space probe headed for a close approach to Pluto has emerged from hibernation and is communicating with mission control.  The probe has traveled 3 billion miles from Earth and is scheduled to approach to within 8,509 miles of Pluto on July 15 2015.  After passing by Pluto and its companion Charon, New Horizons will continue through the Kuiper belt and on out of the solar system.  This being the 21st century, the probe has a Twitter feed, @NewHorizons2015.

New Horizons has actually been napping on and off during the trip, and earlier this year took a really cool time lapse movie of Charon orbiting Pluto before it went back to sleep.  Around May 2015, the probe will start to take pictures of Pluto  with significantly higher resolution than Hubble space telescope.  Stay tuned…

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