CIS471: Network-based applications

New UI and content incompatible with older Roku boxes

2013-05-20T08:37:00.001-07:00

Roku recently changed their user interface and added a lot of new PBS and PBS Kids content to their offering, but older models cannot run the new version of their software or display the PBS content.

I have two Roku boxes. One received the Roku Version 5 update, but the other is older hardware and is stuck with Version 3. (Was there a Version 4)?

I do not care all that much about not being able to use the new, improved interface, but I was surprised and disappointed that I could not see the new content. In retrospect, I can think of business and technical reasons for Roku not supporting the new content format.

Well, I am going to have to replace my older Roku, and, this time, I will be aware that it may not be capable of playing future Roku content. It would also be good if they published a list of their channels, indicating which ones are compatible with which hardware.

Sixty Minute interviews of Bill Gates on the early days, philanthropy and Steve Jobs

2013-05-18T09:30:00.002-07:00

If you missed Bill Gates' appearance on Sixty Minutes last Sunday, you should check it out.

(Transcript)

Gates talks about his goals of eradicating diseases like malaria and tuberculosis and improving health and standard of living in the poorest developing nations.

While he was at Microsoft, Gates quipped that he spent his mornings trying to make money and his afternoons giving it away. He is now a full time philanthropist, looking for appropriate technology and choosing and managing philanthropic projects as a hard-nosed business man.

You also get a look at Gates as a person -- he reads and watches videos of college lectures voraciously. He also became emotional when talking about his relationship with Steve Jobs and his last visit near the end of Jobs' life.

In a separate video, Gates also talks about the school where he learned to program

These are worth watching.

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Update 5/18/2013

Bill gives away a lot of money, but there is more where that came from -- he has regained his spot as the richest person in the world.

New Yorker Strongbox -- citizen+mainstream journalism

2013-05-17T09:05:00.000-07:00

Internet-based citizen journalism predates the Web and has played an important role in hotspots around the world. Conventional jourlists typically rely upon and magnify the impact of citizen journalism, as exemplified by the use of Twitter by television stations in the coverage of the Boston Marathon bombing.

The New Yorker Magazine has taken another step toward citizen+mainstream journalism -- The New Yorker Strongbox -- a secure, anonymous means of communicating with New Yorker editors.

Strongbox uses Tor servers to hide the identity and location of a citizen journalist who submits automatically encrypted messages and files to the New Yorker. The New Yorker editors communicate with the submitter using a randomly generated code name and they have no way to learn who the person is or where they are located.

In the past, Wikileaks has served as an intermediary between anonymous citizen journalists and mainstream publications. The New Yorker is now directly reachable. Will other mainstream publications follow their lead?

(If you cover citizen journalism as a teacher, these teaching modules may be of interest).

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Update 5/17/2013

Steve Gibson talked about Strongbox during episode 404 of his Security Now podcast. The Strongbox segment begins at the 22m 50s point. Gibson talks about the history of the project, which was developed by Internet Activist Aaron Swartz. Gibson expects many news organizations to follow the New Yorker's lead and he pointed out that the open source project is freely available on GitHub.

Google Play Store for Education and the new 3Rs

2013-05-16T09:16:00.001-07:00

Google announced Google Play for Education at Google I/O yesterday.

The store will be geared toward K-12 schools and organized by subject and grade, as shown here.

The apps will be focused on the Common Core State Standards which spell out the language and math skills and concepts students are expected to learn for success in college and careers.

The subject-grade organziation and focus on The Common Core, will make discovery of good apps relatively efficient.

The store will not be online till next fall, but they are encouraging developers to build apps now. I'd be surprised if folks like The Khan Academy and MathisPower4U were not far down this path already. If they and independent developers and creative teachers begin building apps, we may see a loosening of the textbook publisher's grip. (Apple can't be too happy about this announcement either).

This is a K-12 Play store, but it sounds like it could be used as remedial source for today's university students -- you would be astounded by the math and language skills of many of today's undergraduates.

Some may chafe at the standardization and focus of Google Play for Education, but it only addresses a portion of the school day and the material is essential -- the 3Rs of our time.

Google Hangout for a synchronous class meeting: Fail today ... Win tomorrow

2013-05-15T07:59:00.002-07:00

I was travelling, so tried to use a Google on air Hangout for a class session. It was A Fail, but I am optimistic about the future. Let's talk about the failure first, then the rosy future.

My goal was to flip back and forth between talking with the students in the hangout and displaying and narrating PowerPoint presentations. The students who arrived too late to join the hangout would watch it on air and participate in the chat stream.

The session was a failure. Many students had unacceptably slow response time and I was wasting too much time switching between the conversation and PowerPoint. And that was the good bad-news. The real bad news was that the hangout crashed. We restarted it once, then gave up after the second crash.

I convened the hangout and was on a cable connection with Ping time around 20 MS and 15 Mbps up and 1.5 down, but the student's connection speeds and computers varied significantly.

I stopped all applications except Google Plus and PowerPoint on my computer, but forgot to advise the students to do the same.

My Dell laptop is a bit long in the tooth, but seemed to be up to the task. It has 8 GB of RAM, an Intel Core 2 CPU with a 3.06 Ghz clock speed and a 256 GB flash drive.

After several switches back and forth between displaying PowerPoint and the hangout, my computer froze with its fan running at full speed. I brought up the Task Manager and discovered that I had memory to spare, but CPU usage was flat at 100%. Perhaps there was some fatal interaction between Google's software and PowerPoint -- I'm not sure.

I restarted, the students joined back in, and after some time, my machine crashed again, so we gave up.

Even when it works, the user interface for switching between the hangout and PowerPoint is unnecessarily clumsy and distracting -- taking time and several mouse clicks. You should be able to select the windows you plan to use during a hangout when you set it up and switch between those windows and the hangout and chat windows with the touch of a finger or a mouse click.

The students asked afterward why President Obama's hangout went so well and ours so poorly. We speculated that Google may have provided dedicated resources for the presidential hangout and also screened the participant's connectivity and computers.

Well, that was the bad news. How about the good news. There is no doubt in my mind that Google Hangouts will become a valuable educational tool -- used for both synchronous class meetings like the one I tried and student study and project groups.

Google Hangouts have been available for perhaps a year. Hangouts On Air for less time than that. We are using an early prototype. If you think my experience in this class hangout was bad, watch video clips of other early prototypes, like Ivan Sutherland's demonstration of Sketchpad, the first significant computer graphics program or Doug Engelbart's demonstration of just about everything you take for granted today in your direct manipulation, windowed user interface or consider the hardware and systems improvements we have witnessed since the Wright Brothers first flight or the invention of the transistor.

Moore's law will improve the computers we use in hangouts -- my next laptop or tablet and those of my students will be a lot faster. The same will be true of data centers and servers -- driven by improving technology and a need to handle ever more video traffic, which already dominates the Internet. Broadband networks will improve with technology advances and hopefully a bit of competition. (Will Google Fiber go nationwide?). Google may also decide to directly compete in the online education market or they may be content be infrastructure providers for others or both, but I expect that Hangouts 2020 will be as common in the Internet "classroom" as chalkboards and white boards are in the campus classroom today.

President Obama selects Tom Wheeler as FCC chairman

2013-05-14T15:14:00.001-07:00

The President has selected Tom Wheeler, former lobbyist for both the cellular and cable industries and a major contributor to the Obama campaign to head the FCC, and AT&T and Comcast are both lauding the appointment.

That smacks cronyism -- the revolving door between industry to government.

I signed a petition to name Susan Crawford next head of the FCC, but will keep an open mind. Wheeler may have been a lobbyist for the cable and cellular industries, but he was also an Invited Expert by the The President's Council of Advisers on Science and Technology (PCAST), which issued a report calling for the use of smart radios in sharing federal spectrum. He presumably endorses (or at least understands) the report of the PCAST Spectrum group.

His October 2011 blog post Updating Spectrum Policy provides further evidence that he "gets" IP and unlicensed spectrum. Here are a couple of quotes from that post:

"Exhibit A for 21st century spectrum planning is WiFi. Operating in unlicensed spectrum, WiFi is a cacophony of competing claims for use of the spectrum. The characteristics of Internet Protocol (IP) packets allow WiFi in a Starbucks hotspot, for instance, to operate more efficiently that the licensed spectrum on the sidewalk outside."

and

"It is time to abandon the concept of perfection in spectrum allocation. The rules for 21st century spectrum allocation need to evolve from the avoidance of interference to interference tolerance. We’ve seen this evolution in the wired network; it’s now time to bring the chaotic efficiency of Internet Protocol to wireless spectrum policy."

Don't forget that fiercely anti-Communist Richard Nixon, opened US relations with China. Perhaps Dark Side lobbyist Tom Wheeler will modernize wireless IP communication.

Samsung says they've made a wireless breakthrough

2013-05-14T08:21:00.000-07:00

Samsung says they are running high-frequency wireless connections at 1 gbps and suggests that this technology could form the basis of commercial 5G networks by 2020. That sounds good, but on second thought it raises a lot of questions, like:

How is power consumption?
What about our lame data caps? Will you hit your cap in the first hour of the month?
What about backhaul from those gigabit towers?
Don't high frequency signals attenuate rapidly as one moves away from the antenna? How many base stations will have to be added?
Aren't high frequency signals more readily absorbed by obstructions?
If implemented, how well would this technology compete with WiFi, especially if Google or others were to deploy it widely?

Can you think of other "how-abouts?"

An informative article on Netflix in Bloomberg BusinessWeek

2013-05-11T08:33:00.000-07:00

The Netflix article is a profile of the founder, Reed Hastings, and goes into some detail on their technology and strategy. Some of the points that struck me were:

In spite of the fact that Netflix and Amazon are direct competitors in the IP video market, Netflix is hosted on Amazon Web Services.
Netflix streams during the day and analyses data at night. They load servers between 2 and 5 AM local time. Shows they predict will be popular are served from flash storage.
The master copies of all the shows and movies available to Netflix take up 3.14 petabytes of storage space. Netflix compresses the master files creating more than 100 different versions, each tuned for the varying bandwidth, device, and language needs of its customers. The compressed catalog is about 2.75 petabytes.

Check the article for more on the technology, Hastings and Netflix.

North American downstream traffic

Amherst and San Jose State University -- two approaches to MOOCs

2013-05-09T08:03:00.000-07:00

There has been recent news and controversy surrounding the relationship of San Jose State University and MOOC providers Udacity and edX. I was at a conference the week before last and met Catheryn Cheal, Associate Vice President and Senior Academic Technology Officer at SJSU, who is administering the MOOC experiments at San Jose State.

She confirmed a positive result -- students taking a circuits and electronics class did better in a section that used edX material as a supplementary "text" than those in other sections. Based on that experience, they plan to offer more blended classes and will establish a Center for Excellence in Adaptive and Blended Learning.

That sounds reasonable to me. A professor had students subscribe to a MOOC in the same way as he or she would ask them to buy a book or read some articles. The results were encouraging, so the university established a center for research and training on that as a pedagogical technique.

But, SJSU has taken a second step that is less conventional. Ms. Cheal confirmed that they are now offering some classes -- elementary statistics for example -- that will substitute for on-campus classes. Students will get credit at San Jose State and the credits will be "transferable to most colleges and universities nationwide." (In a FAQ, they admonish the student to check with their school).

I am not anti-MOOC. I was at the conference I mentioned above to give a talk on the innovation in pedagogy, technology and school and social systems that I expect to come from MOOCs and modular courseware, but SJSU seems to be moving very fast.

The elementary statistics course mentioned above will be a general education course. On my campus, a faculty committee has to approve general education courses. Based on the course description, it seems to be a typical introduction to descriptive statistics and simple inference, but many majors offer such courses -- education, nursing, business, psychology, etc. Again, department and school curriculum committees traditionally specify curriculum.

I understand the desire to eliminate "bottlenecks" in student progress through the university and, as I mentioned, I expect far reaching innovation from MOOCs and modular courseware, but I am curious to know the decision to accept these particular courses for credit was made. (That is not to say it may not have been the correct decision).

We can contrast San Jose State with Amherst, which recently decided not to offer courses through edX, but to experiment on their own. That strikes me as a prudent middle ground. The university will learn and will become self-sufficient. For example, they might install an open source MOOC platform from Google or from Stanford/edX and let their faculty experiment by developing full courses or modules to supplement their current courses or they might decide to wait until hosted versions of those platforms become available. Amherst will learn and remain in control of its destiny.

Organizations often outsource peripheral functions in order to focus on their core mission. Outsourcing fast food service to Taco Bell might make sense, but teaching is one of the core missions of a university, and we should not rush to outsource it -- to a MOOC provider, a textbook publisher or anyone else.

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Update 5/12/2013

Google tells me the following universities are offering MOOCs using their open source platform, Course Builder: North Carolina State, Indiana, Cornell University, Universitat Politècnica de València, and the Indian Institute of Science, Bangalore.

They also say we can expect Course Builder to become increasingly easy for non-technical faculty to use, but will not comment on the possibility of offering it as a hosted service -- we will have to wait and see about Google MOOCs.

Update 5/13/2013

Robert McGuire provides more details on the blended circuits class mentioned above in this post.

Update 5/14/2013

San Jose State is not the first university to give credit for taking a MOOC. Six European universities gave credit to students who took Stanford's AI course online last year. Students had to go to the University of Freiburg in Germany to take a proctored final exam. San Jose State exams will be proctored using a web cam and screen capture by ProctorU.

Do you know of other cases in which college or university credit was awarded for successful completion of a MOOC?

Citizen journalism and television coverage of the Boston Marathon bombing

2013-05-08T14:34:00.000-07:00

Citizen journalism on the Internet began before the invention of the Web. Today it is a significant source of news. Emily Tolan's nine minute video on the Boston Marathon bombing illustrates the interplay between citizen journalism and television.

The video is a chronological summary of events beginning with the explosions caught on cell phones and ending with Twitter and TV coverage of the capture of the second suspect.

For more on citizen journalism, check these teaching presentations.

Will Google Fiber go nationwide?

2013-05-08T10:47:00.000-07:00

Today's New York Times has an article on yanking US broadband out of the slow lane. Might Google Fiber inspire broadband competition? Better yet, might it be broadband competition? (One also wonders why this article appeared now -- might it have been encouraged by Google PR)?

The article presents a good overview of the mediocre state of broadband connectivity in the US. It prominently features Google Fiber as a possible solution, quoting Milo Medin, who heads the Google Fiber project and was a co-founder of @ Home Networks, a pioneering first attempt to bring broadband to homes shortly after the passage of the 1996 Telecommunication Act (which was designed to create competition, but failed).

Google's announcement that they would install Google Fiber in Provo, Utah, drove speculation that they were planning to go nation wide. This article does nothing to dampen that speculation.

The Internet -- super fast, but simple; the brain, slower, but complex

2013-05-06T13:06:00.000-07:00

Round trip packet time

Which is greater -- the round trip travel time for a data packet sent over the Internet from my home in Los Angeles, California to La Universidad de Magallanes (UM) in Punta Arenas, Chile or the time is takes me to see, recognize and pick up a pen?

This sounds suspiciously like one of those counter-intuitive questions a professor might ask to get a classes' attention, so let me end the suspense. It turns out that both take around the same time, 1/4 second. Let’s see how I reached that conclusion, starting with seeing and picking up a pen.

For that time estimate, we turn to brain science. Luckily, my favorite science podcast, Radiolab, recently broadcast a program on speed, which included a two-minute segment on the communication steps involved in seeing and picking up a pen. Stop and listen to the excerpt -- it enumerates the time spent traversing communication links between your eye and brain, between different regions within your brain, and finally to the top of your brain where the commands to pick up the pen are issued. The entire sequence takes about 1/4 second.

Seeing a pen and picking it up

That is not a great surprise -- picking up a pen seems really fast and automatic. But, what about the round trip time for a packet routed from my home in West Los Angeles to UM? I measured that time using Ping, a simple utility program that sends a packet to a remote host and measures the time it takes for it to get there and an acknowledgement to come back.

As shown here, Ping sent four packets to Punta Arenas. The fastest round trip was 233 milliseconds, the slowest 282 and the average of the four was 259 milliseconds -- just over 1/4 second.

I checked the question answering server at Wolframalpha and learned that the great-circle distance from Los Angeles to Punta Arenas is 6,644 miles. That says our average data packet traveled around 53,000 miles per second -- 28 percent of the speed of light!

Listening to the Radiolab clip, I counted ten communication hops in picking up the pen -- the first from the eye to the middle of the brain, the second from the middle to the back and so forth. Those hops are between clusters of neurons and the information travels along axons.

In the Internet, data packets hop from one router to the next. Routers are special-purpose computers that are programmed to forward packets from one network to another and they communicate either wirelessly or over some sort of cable. In the case of my test, the first hop was wireless -- from my laptop to my home WiFi access point. The second hop was from my home network to my Internet service provider's network over a copper cable. From there the links were all over fiber optic cables, some buried under ground, others under the sea, until they reached the destination computer at UM. The acknowledgement packets traversed a similar path in the opposite direction. Using a program called Traceroute, I counted hops through 18 routers between my house and UM.

Since the distances inside the brain are small, it seems that complex, time consuming processing is taking place in the neurons at each location and the signals between them travel relatively slowly. Contrast that with the Internet, where the communication links are fast, but the processing by each router is simple. It takes a router very little time to forward a packet to the next router along the path to Punta Arenas.

I don't know about you, but I find the speed of the Internet mind blowing but understandable and the complex processing needed to pick up that pen awe inspiring. One day, brain science will reduce both to just being mind blowing.

New wine for new bottles -- innovation from modular teaching material and MOOCs

2013-05-04T08:32:00.000-07:00

I gave a talk on "Innovation from modular teaching material and MOOCs" at the Sloan Consortium 6th Annual International Symposium on Emerging Technology for Online Learning (#et4online).

The slides from the talk are now online here.

Each slide has text notes so they should stand on their own. The presentation also contains quite a few links as well as a recording of Wolfman Jack howling.

If you wish, you can watch a video of the presentation, but that would probably take longer than reading through the PowerPoints.

Six features I want in an educational video player

2013-05-03T08:25:00.000-07:00

The London Olympics were streamed by NBC in the US and the BBC in England. I watched both and blogged about the experience. After it was over, I gave my "gold medal" to the BBC -- they did a better job. One of things I liked about the BBC coverage was their video player, which was more interactive than NBC's -- it was designed for the Internet, not adapted from television.

Video players for teaching should also be interactive -- we need more than a timeline with VCR pause and play buttons. Let me suggest a few things I would like to see in a video player for my students.

1. Clickable chapter headings I currently make teaching videos using Camtasia, which lets me create clickable chapter headings on the left side of the screen as shown here:

The BBC Olympic player also had clickable chapter headings, and they are on my feature list.

2. Variable playback speed When I listen to podcasts, I speed up the playback. As shown here, Coursera's video player allows the student to do the same:

I applaud their innovation, but it has to be combined with clickable chapter headings. When the student changes the speed, the chapter entry points must be recalculated.

In addition to adjusting the chapter start points, the player should be instrumented to see what speeds students use and when they change speeds. This data could be correlated with comprehension and retention as well as the underlying concepts being covered when students speed or slow playback. (My hypothesis is that retention and comprehension would not be diminished by, say, a 15% speed increase).

3. A quick-replay button NBC made a simple, but handy addition to their video controls. They added a button that backed up 15 seconds every time in was clicked. Click it once and the video backed up 15 seconds, click it twice and it backed up 30 seconds, etc. That would be great if a student missed a word or point and wanted to hear it again.

4. Programmed pause points with click to continue This is very simple. As a teacher, I want to be able to insert breakpoints, causing the video to pause while the student thinks about or does something. He or she would simply click a resume button when ready to continue.

5. "Tell me more" button The BBC Olympic player allowed the user to display ancillary information -- record times, athlete's statistics, current standings, etc. as shown here:

A teacher would use tell me more to add context to or paraphrase the point being made in the current chapter, simulating what happens in a classroom when a student is confused and asks for clarification. The teacher does not simply repeat what they had originally said, but uses different words, examples, images, notation, etc.

The student would learn to click this button when he or she found the current chapter confusing.

6. Study-group support Michael Wesch has pointed out that the architecture of our classrooms and lecture halls discourages student interaction. They face forward, looking to the teacher for information. I bet small children relate to each other in school, but I find my university students reluctant to work with or talk to each other during class.

I want a player that lets groups of students study the same video together at the same time. Sharing a video during a Google Hangout would be a step in the right direction, but control of the video would have to be distributed among the students. It would also require a search to discover study partners who were on line on the same lesson at the same time. Study-group support would require more thought and HCI design than my other suggestions, but it would be a terrific addition to the video player I would like for my students.

Well, those are my six suggestions. What would you like to see in a video player for education?

Hear a recording Alexander Graham Bell made in 1885

2013-05-01T08:59:00.003-07:00

The National Museum of American History has released a totally cool reconstruction of an 1885 recording of Alexander Graham Bell reading his handwritten notes.

This video shows the notes scrolling slowly as Bell reads. (Be patient -- the very first part is hard to understand).

The noninvasive optical technique used to scan and recover the recording was invented at Lawrence Berkeley National Laboratory in 2002 with assistance from the Library of Congress. They have used it to reconstruct even older recordings than this one.

I love this sort of thing because it illustrates how we are able to start with very crude proof-of-concept prototypes and refine them over time. There are tons of examples in and out of IT, for example, the Wright brother’s first plane, early automobiles and Doug Engelbart demonstrating WYSIWG word processing, windows, the mouse and many other things at The Demo in 1968.

Doug Engelbart, The Demo

Amherst College says "no" to edX, but how about Google MOOCs?

2013-04-30T08:58:00.000-07:00

The Amherst College faculty voted 70 to 36 with five abstentions against joining edX, MIT's MOOC consortium, but they did not dismiss the idea of MOOCs. They passed a motion proposing that Amherst explore online teaching technology outside the context of the major MOOC groups.

The major MOOC platforms in the US -- edX, Udacity and Coursera -- are trying to build their brands by offering courses from "elite" universities. Most faculty senates will not have to consider the question of partnering with these organizations because they will not be invited in.

Furthermore, few universities have Amherst's $1.64 billion endowment, -- they could not afford edX even if they were invited to become a partner. EdX charges $250,000 to initiate a course and $50,000 each additional time the course is offered. They also take a cut of any revenue the course generates.

Does that mean that all but rich, elite universities are shut out of the MOOC game?

No.

A university can develop and experiment with MOOCs or using a MOOC platform for smaller online classes or to supplement or flip face-to-face classes using open source software. Stanford and edX have combined their MOOC platform software in an open source project and Google also has an open source MOOC platform, Course Builder.

Amherst, or any other university, can explore online teaching by becoming familiar with these open source programs and providing a MOOC platform for use by their faculty. Many professors would ignore the resource, but others would begin using it. The university would gain experience with MOOCs and the way a MOOC platform can be used in a smaller class.

Even better, a university or university system could host a MOOC platform and offer accounts to faculty on multiple campuses. From there it is a small step to a public MOOC platform.

But, a public MOOC service would involve significant expense for servers, bandwidth and staff. How might it be funded? One could argue that such a platform should be funded by government as part of its education mission. Failing that, the usual advertising-based or "freemium" business models might support an open MOOC service.

How about Google? Google is fond of "moonshots" like self-driving cars, and any Internet use benefits their advertising business. For example, they may (or may not) be planning to expand their Google Fiber project and become nationwide Internet service providers. If the ISP venture broke even, Google would still make money by increasing the good-will value of their brand, improving their advertising quality and increasing advertising revenue.

Does that apply to MOOCs as well? Google has their own MOOC software, which they have field tested in running their own MOOC. They also have experience running very large services like Gmail and Google Docs, which are free for individuals and generate revenue from organizations.

How about adding Google MOOCs to the list?

Blaise Pascal argued that a rational person should believe in God because the cost of not doing so and being wrong was infinite while the cost of doing so and being wrong was small. The same goes for MOOCs. If MOOCs are the Next Big Thing, Amherst will be ready. If not, they will not have lost much. They may not even have to invest in their own MOOC platform -- their faculty might just open free accounts at Google MOOCs. Think of it as YouTube for classes.

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Update 5/1/2013

Inside Higher Ed ran an article on the edX discussion within the Amherst faculty (http://bit.ly/10s3Z4R). It gives the pros and cons as seen by a number of faculty members. It's based on an internal Amherst report that is not publicly available. Also has quite a few comments.

Charlie Rose roundtable discussion on online education and MOOCs

2013-04-29T09:45:00.000-07:00

Charlie Rose moderated a worthwhile round-table discussion about online education and MOOCs with Anant Agarwal, CEO of edX; Amy Gutmann, president of the University of Pennsylvania; Joel Klein, former New York City Schools chancellor and CEO of Amplify and Tom Friedman of the New York Times.

The panelists are all MOOC enthusiasts and the discussion is uncritically optimistic. They tout the upside and brush difficulties under the rug, but don't let that put you off.

As the panelists point out, today's MOOCs and Internet technology are still version 1.0. Regardless of today's MOOCs, they, like the Wright Brothers first airplane, are attracting attention, capital and smart people. I think MOOCs (and modular courseware in general) have kicked off a wave of innovation that will transform Internet-based teaching. We are beginning to depart from traditional online teaching that was modeled on the classroom and lecture hall.

(The roundtable video is 38 minutes long. If you would rather just listen to the .mp3 audio while working out at the gym or washing dishes, you can download it here).

The tactics and cost of the US telecommunication cartel

2013-04-24T09:44:00.000-07:00

For a quick (six minute) summary of the cartel's tactics and their cost to the nation, listen to Brooke Gladstone's interview of David Johnston, author of the book "The Fine Print: How big companies use plain English to rob you blind."

Gladstone is co-host of OnTheMedia, an award winning NPR program that covers the Internet and other media.

(I've been ranting about the excesses of the telecommunication cartel for several years).

Grading the MOOC University

2013-04-24T09:10:00.000-07:00

Maria Montero sent me a link to A. J. Jacobs' student-centered review of MOOCs, which appeared in the New York Times. Jacobs enrolled in 11 highly diverse MOOCs and finished 2 -- a typical browse/complete ratio.

Jacobs was also interviewed on NPR's Talk of the Nation (transcript and audio recording).

Jacobs "graded" MOOCs as follows:

The professors: B+
Convenience: A
Teacher-to-student interaction: D
Student-to-student interaction: B-
Assignments: B-
Overall experience: B

Jacobs' conclusion:

As these online universities gain traction, and start counting for actual college course credit, they’ll most likely have enormous real-world impact. They’ll help in getting jobs and creating business ideas. They might just live up to their hype. For millions of people around the globe with few resources, MOOCs may even be life-changing.

As for whether MOOCs will ever totally replace colleges made of brick, mortar and ivy, however, count me as a skeptic. A campus still has advantages for those lucky enough to afford the tuition — networking being one. (Even dropouts like Mark Zuckerberg made key social connections at Harvard.) And an online college will never crack Playboy’s venerable annual list of top party schools.

Google Fiber plus ubiquitous, free WiFi -- an offer your mayor cannot refuse

2013-04-19T15:30:00.000-07:00

Google Fiber started in Kansas City. Based on that experience, they expanded to nearby Olathe, Kansas and hi-tech cities Austin, Texas and Provo, Utah will be next.

There has been a lot of speculation about Google's intention. Is Google Fiber just a proof of concept designed to spur the incumbent ISPs on? Were they picking hi-tech cities hoping to see some futuristic application development? Or, were they planning to become a nationwide ISP?

We got a hint when Eric Schmidt said Google Fiber was a "real business" and we read estimates of the cost of the Kansas City network and of a nationwide build-out.

Jason Calacanis has no doubt about Google's intention. His latest blog post is entitled "Google's Fiber Takeover Plan Expands: Will Kill Cable & Carriers."

You should read it for yourself, but I want to focus on one claim he makes:

More importantly, every Google Fiber home will have a public wifi component. In order to get Google Fiber, you’re going to have to agree to put a router in that lets anyone use a portion of your bandwidth.

That’s not announced, but it’s gonna happen.

His contention is bolstered by the fact that Google is an investor in Fon. I wrote about Fon a few years ago in a post about people owning their own Internet infrastructure and providing decentralized backhaul for Wifi. Fon gave users free, open WiFi routers, but there were two problems.

For Fon to succeed, the open modems had to be ubiquitous. I was an original "Fonista," but there were only a few others in my part of Los Angeles. The second problem was backhaul speed. I had a slow DSL connection at the time. If a lot of neighbors and passersby had connected to my Fon router, it would have impacted my connectivity.

Those problems disappear if Fon is tied to Google Fiber. Google Fiber is such a good deal that it would become ubiquitous and, if you have gigabit service, you won't notice the load imposed by WiFi users.

Google needs cooperation with cities if Google Fiber is to succeed. One "carrot" they have been offering is free connectivity for community sites like libraries and hospitals. What if they sweeten the pot with ubiquitous WiFi? That is an offer the mayor cannot refuse.

Google has another asset. Recall that the decision to start in Kansas City was based on a proposal from the city. I don't know how many proposals Google received or what the cities offered, but Topeka joked about changing the city name to Google and Kansas City offered significant subsidies. I bet Google got some sweet offers. I know they got a sweet sales-lead list.

If Jason Calacanis is right, and I do hope he is, this is the beginning of the end of business as usual for wired and wireless ISPs (aka cell phone companies).

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Update 4/26/2013

Time Warner Cable says they will offer free Wi-Fi in Austin (http://bit.ly/Y1vSUX). It seems they got Google's message. That being said -- I wonder whether they will be able to deliver. What will be their backhaul strategy?

Lies, damn lies and open data -- Reinhart and Rogoff challenged

2013-04-17T11:36:00.000-07:00

This is one of several cool XKCD cartoons on
statistics. See http://bit.ly/XGLLju for others.

In 2010, economists Carmen Reinhart and Kenneth Rogoff published "Growth in a Time of Debt." They analyzed national income statistics from 44 nations over a span of as much as 200 years. Their dataset incorporated over 3,700 annual observations.

Their main conclusions were:

Above 90 percent debt/GDP, median growth rate falls by one percent, and average growth falls considerably more.
In emerging markets, "When external debt reaches 60 percent of GDP, annual growth declines by about two percent; for higher levels, growth rates are roughly cut in half."
For the advanced nations as a group, there is no apparent contemporaneous link between inflation and public debt levels, but in emerging markets inflation rises sharply as debt increases.

The study was influential. It has 450 Google Scholar citations and was widely quoted by Paul Ryan and other politicians arguing for austerity.

But, a new paper by University of Massachuets economists Thomas Herndon, Michael Ash and Robert Pollin analyzes the same data and comes to different conclusions.

This does not mean Reinhart and Rogoff are charlatans or Ryan and other politicians are liars. Ryan (hapilly) accepted Reinhart and Rogoff's conclusions as fact and Reinhart and Rogoff built a number of questionable assumptions into the spreadsheet they used to analyze their data. They were also careless, evidently not catching a spreadsheet coding error.

But, there are many ways to analyze any multivariate dataset. Data analysis is like the proverbial blind men describing an elephant while touching different parts. A study like this does not give The Answer, it gives an answer.

The best way I can think of to cope with such complexity is to let many people analyze the same data. As the open source software aphorism states "given enough eyeballs, all bugs are shallow."

While I may not agree with the assumptions they made in their analysis, I applaud Reinhart and Rogoff for publishing their data and spreadsheet. You can download them and do your own analysis.

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Updated, 4/21

Paul Krugman has weighed in on the Reinhart and Rogoff affair, commenting on its practical political and economic influence in a column on "The Excel Depression" (http://nyti.ms/14IrRd5). I typically agree with what Krugman writes, including this column, but its title is a bit over the top.

Presidential science initiatives (including the Internet)

2013-04-08T08:02:00.001-07:00

President Obama has called for initiatives to map the human brain and bring an asteroid to Earth for study.

What a breath of fresh air to see a president who is thinking beyond today's simple minded political jousting -- even if the proposed budgets are just a down-payment for planning and design. It is reminiscent of President Kennedy telling Congress:

"I believe that this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the moon and returning him safely to Earth."

(I get kind of misty typing that quote).

Of course there have been other noteworthy presidential efforts -- check the "Progressive Professor's" list of the top 15 presidential science investments, starting with Thomas Jefferson's sponsoring of Lewis and Clark.

Although no single president can take the credit, I would add a sixteenth to the professor's list -- the funding of the research and development that led to the Internet. I researched this topic for a 1996 CACM article, Seeding Networks: the Federal Role, and turned up the following costs:

One can argue that this $124 million was only for research and development and we should also count the money spent on government procurement -- most notably SAGE, a networked early warning system for manned bomber attacks (video), which cost an estimated $8 billion. (The SAGE video is a bit off topic for this post, but it highlights technical progress beautifully . Even if you include SAGE and prototypes like MIT project Whirlwind, the networking investment has paid off handsomely.

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Update 4/9/2013

Prominent scientist thinks the brain map should have more funding. Harvard professor George Church, a veteran of the human genome project and an advocate for this study says the project should start small and have funding from several agencies. be ambitious and focus on developing new technologies from the start. Lots more ... this is a recommended article.

Combined Course2go and edX platforms will lead to hosting services

2013-04-06T09:42:00.001-07:00

When MIT announced the creation of edX, they promised to open source their MOOC teaching platform. Last September, both Stanford and Google open sourced their MOOC platforms, Course2go and Course Builder.

Stanford and edX have announced that they are merging their platforms. Stanford's Course2go is now in maintenance mode and its features will be moved to edX by June. I wonder what Google plans to do.

This is good news -- it means schools will be able to offer MOOCs without using the services of a commercial firm like Udacity or Coursera. A school or a system like the California State University could host MOOCs using the edX platform.

The next step will be hosted services open to any teacher or anyone else who wants to teach a class -- MOOC or other. A thousand flowers will bloom. How will this affect course management systems like Blackboard and Moodle?

Is there a place for online training companies in the MOOC discussion?

2013-04-05T16:00:00.000-07:00

My daughter teaches an upper division finance course, in which spreadsheets are an important tool. In order to take her class, the students must have passed two classes -- an introductory information systems course, which includes learning to use Excel, and a prerequisite finance class.

She tells me that a number of her students do not understand that you can enter a formula into a spreadsheet cell. Others may understand that they can enter formulas, but lack basic arithmetic skills like understanding percents and rates or converting from one unit of measure to another.

It turns out that they do gain rudimentary skill with Word and PowerPoint in the introductory course (or before they get to college), but we are doing a bad job of teaching rudimentary spreadsheet skills.

What can we do? One approach is to put off the introduction to spreadsheets until they are needed in an accounting or finance class, and present them there, but that would lead to curricular redundancy.

How about a short course on spreadsheets that focused on just the features needed for subsequent classes? That sounds like a good idea to me, but it is less than a typical college course -- perhaps one unit. That would be administratively awkward and, more important, we do not seem to be capable of teaching spreadsheet skills to a significant number of our students.

How about a spreadsheet MOOC? That would pay off in terms of economy of scale, and we should be able to spend the resources on it to become really good spreadsheet teachers. We could even make the course modular so a given school could elect just the spreadsheet features they wanted their students to master.

Cool, let's do a MOOC, but who should teach it? Today's MOOCs are offered by university professors, but would it make more sense to turn to an organization with expertise in training?

I Googled around and found two organizations with Excel training online, Udemy and Lynda.com. Would they be better candidates for teaching a spreadsheet MOOC than a university? Would they be willing to sell wholesale to a university -- giving us reduced prices for, say, 100 students and tailoring the course to the features we want covered?

Udemey charges $99 for unlimited lifetime access to their 16-section Excel course. What would they charge for, say, 100 students who had access to only 8 of the sections for one semester?

Lynda.com charges $25 per month for access to all of their training material. What would they charge for, say, 100 students who only had access to their Excel course for three months?

Universities around the world are beginning to offer MOOCs and we are thinking about giving credit for completion of MOOCs offered at other universities. Perhaps we should also think about giving credit for or requiring completion of courses taught by training companies.

Can we grade and give feedback on college essays automatically?

2013-04-05T08:37:00.000-07:00

I am skeptical, but a New York Times article says the folks at edX will be doing just that using "artificial intelligence." They also say students will be able to improve their essays using feedback from the system. EdX promises to open the grading platform to others -- presumably as a Web service.

EdX has hired Vik Paruchuri to work on the service, which he developed for an automated essay grading contest sponsored by the Hewlett Foundation. The contest results are reported in a paper by the contest organizers, which concludes that automated essay scores correlate well with those of human readers. (Before you settle for that, read this critique of those results by MIT professor Les C. Perelman).

The Times article does not contain a link to a service and I can't find one on the edX web site, so I will remain skeptical. Grammar checking? For sure. Meaningful feedback? Show me the API or URL.