This post is off topic -- not about the Internet per se -- but the joke cracked me up and the image gallery accompanying this NY Times article are a terrific recapitulation of US v Cuba since 1959.
Click here for the image gallery |
Internet applications and technology and their implications for individuals, organizations and society
This post is off topic -- not about the Internet per se -- but the joke cracked me up and the image gallery accompanying this NY Times article are a terrific recapitulation of US v Cuba since 1959.
Click here for the image gallery |
Posted by Larry Press at Permanent link as of 11:45 AM 0 comments
Posted by Larry Press at Permanent link as of 1:43 PM 0 comments
What comes to mind when you hear the word Rand? Ayn Rand? Rand Paul? For me, it is the RAND Corporation. Project RAND (research and development) was housed at Douglas Aircraft in Santa Monica, California immediately after World War II, and became an independent, nonprofit organization in 1948. Perhaps the first "think tank," they spun off their development work, creating the System Development Corporation (SDC) in 1957.
I don't know how one ranks research institutions, but, for me, RAND ranks right up there with Bell Labs, IBM Research, and newcomers Microsoft and Google Research. The following are summaries of some of the computer science advances made by RAND researchers and consultants.
Communication satellites: Science fiction writer Arthur C. Clark outlined the vision of geostationary communication satellites in a short article published in October 1945. Five months later, Frank Collbohm and James Lipp published a comprehensive engineering study on a "Preliminary Design of an Experimental World-Circling Spaceship."
Arthur C. Clarke's vision (left) and RAND's design |
A pigeon solves Wolfgang Kohler's box-and-banana problem by applying the Box Move operator. |
T-shirt -- Entities, Attributes and Sets |
JOHNNIAC |
Programmer at a JOSS terminal |
Object-oriented drawing and character recognition on the RAND tablet |
Traffic to be transmitted is first chopped into small blocks, called Message Blocks or simply messages. These messages are then relayed from station to station through the network with each station acting as a small "post office" connected to adjacent "post offices."After simulating this system and considering the technology of the day, Baran concluded in Volume 11 that
It appears theoretically possible to build large networks able to withstand heavy damage whether caused by unreliability of components or by enemy attack.He was right!
Paul Baran's distributed network architecture |
Paul Baran on distributed networks and packet switching (38 minutes plus Q&A) |
The AN/FSQ-32 supported research on man-machine systems. |
Posted by Larry Press at Permanent link as of 3:11 PM 0 comments
18F: Open source and transparent processes -- who says government has to be old fashioned, slow and inefficient?
In an earlier post, I described USDS and 18F, new government agencies that are intended to improve US e-government in the wake of the HealthCare.Gov debacle. USDS is a management consulting firm for federal agencies that favors lean startup methods, open source and agile development by small teams. 18F complements USDS -- they build tools and implement government systems.
You can check 18F's open source projects at the "alpha" version of their project dashboard. As shown here, they currently have twelve projects in various stages of development.
Posted by Larry Press at Permanent link as of 9:00 AM 0 comments
Labels: 18F, e-government, singapore
Routers in space
(See the related post on cost savings from re-use of rockets used in launching satellites).
In the early 1990s, cellular pioneer Craig McCaw, Microsoft co-founder Bill Gates and Saudi Prince Alwaleed bin Talal founded Teledesic, with the intention of providing global Internet connectivity using low-earth orbit satellites. The satellite and launch technology were not good enough and the company failed.
Teledesic animation showing a satellite constellation that would cover the planet. |
Two Plane Labs satellites just after launch from the ISS |
Greg Wyler wants to bring the Internet to the entire world. |
Elon Musk will compete with OneWeb |
Wyler with a mock-up of a user terminal |
Wyler illustrates the latency differences between low, middle and geostationary orbits |
Update 2/12/2015
Third time is closer, but still no cigar :-(. "Rocket soft landed in the ocean within 10m of target & nicely vertical! High probability of good droneship landing in non-stormy weather." — Elon Musk February 11, 2015
Update 3/10/2015
Excerpts from a Via Satellite interview of Greg Wyler.
VIA SATELLITE: With industry verticals being served, and O3b connecting the other 3 billion people, where does OneWeb fit in to the communications landscape?
Wyler: O3b Networks does links around 150 Mbps and up, and this is about links that are much lower speeds than that. Our primary core competency will be sub 50 Mbps to small, inexpensive terminals.
VIA SATELLITE: How difficult was it to get investors like Virgin and QualComm to buy into this vision?
Wyler: Qualcomm knows more about communications chips, handover protocols and LTE then any other company. They also have a long background in satellite having built Globalstar and many other satellite communications systems. Virgin has Richard as the leader with a strong understanding of things that you can’t imagine he would have a sense of, and then this deep bench of players.
VIA SATELLITE: I understand an RFP is already out regarding the manufacturer of these satellites? When do you hope to finalize this?
Wyler: We are building satellites at high volume. They need to be done on a production line, rather than a one-off manufacturing process. We are going into a partnership where we will own a portion of the factory and the manufacturer the other portion.
VIA SATELLITE: Is 2017 a realistic timeframe to launch the first satellites? Wyler: I am an optimist. I think 2017 is a realistic time to have our test satellites up. I am not saying the constellation will be working then.
Update 3/18/2015
A third would-be satellite ISP, Leosat, has revealed plans for a constellation of Internet satellites. They will not be marketing to individual end users, but will target government and business -- maritime applications, oil and gas exploration and productions, telecom back-haul and trunking, enterprise VSAT, etc. They (and the others) hope to be able to provide low latency links over long distances. As shown here, a route from Los Angeles to southern Chile requires only 5 satellite hops as opposed to 14 terrestrial hops.
Update 10/7/2016
We have followed SpaceX's efforts to cut satellite launch cost by soft-landing and reusing rockets. Another way to cut launch costs is to use a single launch to place multiple satellites in different orbits and the Indian Space Research Organisation (ISRO) has successfully launched eight satellites into two different orbits. If rocket reuse and multiple-orbit launches become routine, the cost of creating constellations of Internet service satellites will be significantly reduced.
Single launch places eight satellites in two different orbits.(credit: ISRO) |
Update 11/17/2016
SpaceX has submitted a 102-page technical supplement to their application for permission to launch a constellation of Internet-service satellites.
leaked SpaceX financial documents reveal that Elon Musk expects significant revenue as a satellite Internet service provider:SpaceX eventually plans to launch 4,000 communications satellites, which would be dozens of times larger than any other constellation, with the first phase of this possibly going online as early as 2018. SpaceX anticipates that the satellite business will become more profitable than the rocket business by 2020, generating tens of billions of dollars by the mid-2020s.Another post on the same leak was more specific, saying that "SpaceX expects to generate more than $15 billion in profit by 2025."
Update 1/18/2017
Two of the updates to this post were triggered by SpaceX filing a request to launch 4,400 Internet service satellites last November and a leak of SpaceX financial data last week. Each of those events triggered in-depth, informative discussions on Reddit. The Reddit discussion of the request to launch the satellites (here) and the Reddit discussion of SpaceX finance (here) cover launch, radio and IP technology, markets, advantages and disadvantages compared to terrestrial networks and much more. Check them out and join the discussions.
Update 3/11/2017
A 2016 patent by Mark Krebs, then at Google, now at SpaceX, has several interesting figures like this one specifying two constellations, each at a different altitude. As shown here, the lower-altitude satellites have smaller footprints, but would have lower latency times than the higher altitude satellites.
The higher-orbit satellites will be launched in the first phase of the project, enabling SpaceX to bring the Internet to underserved and rural areas of the Earth. The second phase, lower-orbit satellites, will be able to offer faster service and possible compete with terrestrial networks in urban areas. I am not sure, but being at different altitudes might also simplify multi-satellite launches -- launch half at low altitude then proceded to the higher altitude and launch the second half. The high altitude satellites might also enable fewer hops on long, over-the horizon routes (as shown above) and make for smoother satellite handoffs during a session. The following is a neat video explainer of the SpaceX plan:
Posted by Larry Press at Permanent link as of 6:16 AM 0 comments
Labels: development, devnat, elon musk, Greg Wyler, ICT4d, OneWeb, satellite Internet, spacex, Teledesic
Posted by Larry Press at Permanent link as of 2:21 PM 0 comments
Labels: chromecast, roku
Google could even take the Android approach -- make the technology available to municipal governments and others and watch their advertising business grow as it is deployed.
In 2012, Goldman Sachs analyst Jason Armstrong looked at Google Fiber and estimated that it would cost them $70 billion to connect less than half of all US homes. He also estimated that it had cost Verizon $15 billion to bring FIOS fiber to 17 million homes. Armstrong concluded that he was "still bullish on cable, although not blind to the risks." (Armstrong has since left Goldman Sachs and works at Comcast and Verizon has cut back on FIOS).
That sounds grim, but what if wireless technology could significantly reduce the cost of connecting homes and offices?
Google has asked the FCC for permission to conduct tests of millimeter wave-length wireless communication for 180 days.
As shown below, short wavelength, high frequency (E-band) signals travel relatively short distances and can not pass through walls or other obstructions, but they enable gigabit and faster data transmission rates:
E-band wireless in context: The current market is dominated by a few companies selling equipment for cell phone backhaul and other point-to-point applications, but what if the smart guys at Google could figure a way to use it for neighborhood links? (Image: E-band communications.) |
Posted by Larry Press at Permanent link as of 5:26 AM 0 comments
Labels: e-band, google, google fiber, hybrid fiber-wireless
Attendance varies between courses, with the day of the week and with special events like exams and guest speakers.
Samuel Moulton, director of educational research and assessment for the Harvard Initiative for Learning and Teaching gave a presentation on their preliminary research on lecture attendance. He reported on attendance from 10 classes, and found that attendance varied depending upon day of the week:
Posted by Larry Press at Permanent link as of 2:54 PM 0 comments
Labels: attendance
The technical problems will be resolved, but I don't want to watch commercials, so I will pass.
Last week, CBS announce the availability of CBS All Access, allowing subscribers ($5.99 per month) to watch CBS TV shows online. You can stream episodes of CBS series using a browser or portable app and, in selected markets, you can watch live programs as they are broadcast. Broadcast episodes are available the following day for streaming.
Posted by Larry Press at Permanent link as of 7:52 AM 0 comments
Labels: cbs, cut the cord, streaming
It seems to me that educated people should know something about the 13-billion-year prehistory of our species and the basic laws governing the physical and living world, including our bodies and brains. They should grasp the timeline of human history from the dawn of agriculture to the present. They should be exposed to the diversity of human cultures, and the major systems of belief and value with which they have made sense of their lives. They should know about the formative events in human history, including the blunders we can hope not to repeat. They should understand the principles behind democratic governance and the rule of law. They should know how to appreciate works of fiction and art as sources of aesthetic pleasure and as impetuses to reflect on the human condition.The above quote is from the middle of a New Republic article by Pinker. Let me tell you about the article and its context.
On top of this knowledge, a liberal education should make certain habits of rationality second nature. Educated people should be able to express complex ideas in clear writing and speech. They should appreciate that objective knowledge is a precious commodity, and know how to distinguish vetted fact from superstition, rumor, and unexamined conventional wisdom. They should know how to reason logically and statistically, avoiding the fallacies and biases to which the untutored human mind is vulnerable. They should think causally rather than magically, and know what it takes to distinguish causation from correlation and coincidence. They should be acutely aware of human fallibility, most notably their own, and appreciate that people who disagree with them are not stupid or evil. Accordingly, they should appreciate the value of trying to change minds by persuasion rather than intimidation or demagoguery.
Posted by Larry Press at Permanent link as of 10:47 AM 0 comments
I am not a game theorist or an economist, but it seems that the work of economics Nobel Prize winner Jean Tirole has two Internet industry applications, one regarding two (or more) sided markets, the other in regulation of monopolies and oligopolies.
Two sided markets
The iPhone is a product for consumers and a platform for developers. The optimal price is not obvious. |
US ISPs like Comcast are able to charge content providers delivery fees and set high high prices for end users. |
The issue in telecoms arises with what is termed the last-mile problem. You only have one set of cables or copper coming into your house. The solution adopted around the world has been to say, okay, one firm owns this cable, but what they have to do is provide access to these cables. So If I want another firm to provide me with TV or Internet, they have to allow that firm to effectively rent the cable from the other firm.That strategy worked well in the Netherlands, according to Ad Scheepbouwer, CEO of the Dutch telephone company KPN:
In hindsight, KPN made a mistake back in 1996. We were not too enthusiastic to be forced to allow competitors on our old wireline network. That turned out not to be very wise. If you allow all your competitors on your network, all services will run on your network, and that results in the lowest cost possible per service. Which in turn attracts more customers for those services, so your network grows much faster. An open network is not charity from us, in the long run it simply works best for everybody.But it failed in the US. Congress anticipated the same sort of infrastructure sharing when they passed the Telecommunication Act of 1996, but the incumbent operators were able to thwart that effort in courts, statehouses and local government.
Basically, [Tirole] made it OK to tell stories rather than proving theorems, and thereby made it possible to talk about and model issues that had been ruled out by the limits of perfect competition. It was, I can tell you from experience, profoundly liberating.My guess is that the executives at companies like Apple and Google were dealing in stories, like the ones described above, without reading Tirole. Thinking about and elaborating on the story had more to do with Apple's iPhone pricing than the results of a game theoretic model. It also sounds like economists like Krugman and European regulators took Gans' advice -- they read Tirole's books.
Posted by Larry Press at Permanent link as of 9:08 AM 0 comments
The Washington post published an article on a domain name "squatter," who specializes in buying and reselling, at the right time, disease domain names. He owns ebola.com and wants to sell it before its value drops because “Ebola ... is something that could ameliorate and not be a big news story for that much longer.”
While he waits for the bids to roll in on ebola.com, it is redirected to ebola.org, where you can see links to frightening articles:
Posted by Larry Press at Permanent link as of 4:18 PM 0 comments
Vannevar Bush and an artist's rendition of his hypothetical scientific collaboration work station, dubbed the "memex" -- memory extender |
Posted by Larry Press at Permanent link as of 11:22 AM 0 comments
Labels: government role, nih, research, science
Increased censorship of the Hong Kong demonstrations |
Relcom's "kremvax" relayed USENET news during the Soviet coup attempt. |
Protesters used Facebook during the Arab Spring. |
Turkish dissidents painted DNS server addresses on walls |
Venezuelan protesters used the Zello walkie-talkie app. |
The Chinese government is censoring news of today's Hong Kong protests. |
Many Chinese are unaware of the 1989 Tiananmen Square protests |
Posted by Larry Press at Permanent link as of 2:16 PM 0 comments
Labels: citizen journalism, internet resilience, Tiananmen square
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