The data have returned from Cassini’s closest-ever flyby of Iapetus (see 09/07/2007). All the images can be found at Cassini Multimedia raw images, with good samples posted by the imaging team here and here. Amateurs and pros at Unmanned Spaceflight started getting really excited at 12:40 a.m. Tuesday when the images hit the web, and were nearly beside themselves with astonishment as more images from the bright side came down Wednesday evening. The clarity and detail visible in the photos is stunning. It now appears that the equatorial ridge feature does indeed circle the entire moon, at least faintly (see globe) and has been severely battered by craters. The crisp boundaries between dark and light material raise new questions about this unique yin-yang moon, because the white surface appears pristine by comparison, right next to the dark material. Some of the white areas appear young and craterless, suggesting some form of reprocessing of the material after emplacement. The other instruments have contributed their data toward the goal of understanding the composition, depth and distribution of the dark and light materials, but interpreting the rich data set will take years.These are very interesting results indeed. Come back later for comments after the scientists publish their initial analysis. Incidentally, did you know that the name Iapetus appears to be a Greek derivative of the name Japheth, one of the three sons of Noah? Some scholars believe that Greek mythology has some roots in Old Testament accounts. The story that Iapetus was one of the Titans who inherited a third of the Earth could be a corruption of the story of Japheth, one of the three sons of Noah who repopulated the world after the Flood. The Parthenon Code is one site that investigates such connections between the Bible and later Greek mythology.(Visited 12 times, 1 visits today)FacebookTwitterPinterestSave分享0
14 January 2010 Growth in the number of internet users in South Africa was relatively stagnant from 2002 to 2007, when it never rose above 7%. However, this rate almost doubled in 2008, and continued accelerating in 2009. “The year ahead will see the proliferation of high-speed connectivity materialising more widely than ever before.” New cables, market liberalisation The Internet Access in South Africa 2010 study, conducted by World Wide Worx and sponsored by Cisco, shows that the internet user base grew by 15% last year, from 4.6-million users to 5.3-million users, and is expected to grow at a similar rate in 2010. Fibre-optic city networks “The large providers, in turn, began to offer far more competitive packages to both customers and resellers,” the statement read. “The good news is that we will continue to see strong growth in 2010, and we should reach the 6-million mark by the end of the year,” Wide Worx MD Arthur Goldstuck said in a statement this week. SAinfo reporterWould you like to use this article in your publication or on your website? See: Using SAinfo material “Almost every large player in the communications industry has realigned its business to take advantage of this relentless change.” Higher broadband usage by SMEs World Wide Worx found that the landing of a new undersea cable on the South African coast was only one of a range of factors behind the growth. Of greater significance was the granting of Electronic Communications Network Service licences to more than 400 organisations. This meant that service providers that were previously required to buy their network access from one of the major providers could now build their own networks or choose where they wanted to buy their access. Each company moving from dial-up to ADSL, for example, extended internet access to general office staff. This process was found to add an additional one to 20 new users to the internet user base for every small business installing ADSL. “A sustained growth in internet penetration is a key factor that will positively influence the economy of South Africa,” says Cisco Internet Business Solutions senior manager Reshaad Sha. “The varied range of application services and social networking platforms used by local consumers has fuelled the uptake that we see today.” “South African consumers and businesses are demanding access to online applications and services that can only be experienced via high-speed connectivity, such as fibre-optic networks,” said Sha. While the headline findings examine the general numbers of users, the final Internet Access in SA 2010 report, due to be released in March, will highlight the extent of new fibre-optic networks laid down across South African cities and between the cities. World Wide Worx found that a second key factor in growth over the past two years has been the continued uptake of broadband connectivity by small and medium enterprises migrating from dial-up connectivity. It will also examine the impact of the range of new undersea cables that will be in place by the end of 2011, and which is expected to enhance competitiveness even further. “In the coming year, operators will begin to leverage the combination of new undersea cable capacity and new fibre-optic networks to supply corporate clients and resellers with bigger, faster and more flexible capacity,” says Goldstuck. The result was that a market previously characterised by a limited range of providers and services suddenly exploded as small providers were able to repackage the services provided by the large telecommunications corporations in any way they wished. A new study has found that the number of South African internet users has passed the five-million mark for the first time, finally breaking through the 10% mark in internet penetration for the country.
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