January 14, 2005

Hawaii DVTS and VLC Technical Information

At the University of Tennessee, we are providing two high-quality, permanent multimedia streams. The first is an audio feed of our radio station WUOT, while the second is a stream of our student television station TVC. Both are multicast streams.

WUOT is being streamed using VLC, and is an MPEG-1 stream running at 448k for superior sound. While any player capable of tuning into a multicast MPEG stream should be able to receive it, we recommend using the free, open-source VLC player available for most popular platforms. Getting the stream is simple. After running VLC, select 'File' and choose 'Open Network Stream' (or similar). Then, pick UDP/RDP Multicast, inserting as the IP, and 1234 as the port. That's it!

We are using DVTS to stream TVC out as raw DV at a constant rate of about 30 megabits. In order to receive the stream, you must use the DVTS client, which for some platforms is integrated within a GUI and for others is a standalone application. Although offered on many platforms, the most stable, robust, and user-friendly version is for Windows (an even more recent version for Windows XP only can be found here and is the suggested version to use on that platform), but Mac and Linux versions are also available. Instructions for opening the stream unfortunately vary from version to version, but essentially you will find a 'Join Multicast' or similar option. The IP to use is, and the port is 8000.

Posted by Jason Simms at 07:01 AM | Permalink | Comments (966) | TrackBack | Links to this post
Categories: AudioVideo-over-IP | General

January 13, 2005

Imagining the Internet Predictions Database

     The Imagining the Internet Predictions Database examines the potential future of the Internet while simultaneously providing a peek back into its history.
Posted by Chris Hodge at 01:45 PM | Permalink | TrackBack | Links to this post
Categories: General

Distributed Classification

Ulises Ali Mejias has just published a paper on distributed classification, also known as free tagging, open tagging, ethnoclassification, folksonomy, and faceted hierarchy, and associated with such services as flickr, del.icio.us and furl. Mejias' main focus is on how users perceive these systems, and how they interact with each other through them. Useful literature review of a nascent field of research.
Posted by Chris Hodge at 01:20 PM | Permalink | TrackBack | Links to this post
Categories: Information Studies | Interaction & Collaboration

January 11, 2005

NetWare Rewritten, Merged With Linux, and Released Under Cherokee Open Source License

     Jeff Merkey, a former chief scientist of Novell, has rewritten Netware and merged it with Linux. The new operating system will be known as GaDuGi, a Cherokee word for the work crews that used to engage in what we might call community service for the good of the whole tribe. Merkey plans to release the new software under the Cherokee Nation Open Source License, which is still being written, but which will reportedly recognize trade secret rights in the underlying code.
     Any Open Source License that incorporates Linux and recognizes trade secret rights is likely to be challenged on three fronts: first, it would violate the definition of Open Source, which is trademarked by the Open Source Initiative; second, it would violate Linux's own GPL and probably be illegal under US law; and third, under the Uniform Trade Secrets Act, once a trade secret is published in public with good faith, it ceases to be a trade secret. [More]
Posted by Chris Hodge at 10:57 AM | Permalink | TrackBack | Links to this post
Categories: Open Source

January 10, 2005

Using Blogs To Deliver Science, Technology News

     To deliver information about library news, services and resources to the science faculty and students at Georgia State University, several librarians developed a blog, Science News ..... This article summarizes the librarians’ rationale for moving to this dynamic format, how the technology was balanced with the needs of the librarians and patrons, and the issues and challenges that are being addressed to ensure that this will be a viable and successful news delivery system.
     UT Libraries also maintains a Sci-Tech News Blog.
Posted by Chris Hodge at 05:22 PM | Permalink | TrackBack | Links to this post
Categories: Interaction & Collaboration

Toward a Literacy of Cooperation

     Toward a Lteracy of Cooperation is a course being offered through the Stanford Humanities Lab, led by Howard Rheingold and featuring lectures by Ross Mayfield, CEO of Socialtext; Bernardo Huberman, Director of the Information Dynamics Lab at Hewlett Packard Laboratories; Peter Kollock, author of Communities in Cyberspace; and others. Everyone is invited to participate in the course via wiki and blog by registering here. Video of the lectures is being made available as well. [Course Overview]
Posted by Chris Hodge at 05:03 PM | Permalink | TrackBack | Links to this post
Categories: Interaction & Collaboration

Sun Unveils Sizzle, World's Smallest Secure Web Server

Sun has just announced the debut of Sizzle (from SSSL, or Slim SSL), the world's smallest secure web server. Sizzle runs on the Berkeley/Crossbow "motes" -- battery-powered, wireless devices equipped with an 8-bit microprocessor, 128KB of FLASH and a mere 4KB of RAM. Sizzle implements SSL, and uses Elliptic Curve Cryptography (ECC), which has been chosen by the National Security Agency as the next generation public-key cryptographic technology for protecting sensitive U.S. Government information. [Press Release]
Posted by Chris Hodge at 03:17 PM | Permalink | TrackBack | Links to this post
Categories: Pervasive Computing | Security

The Importance of Being Permanent

     Without permanence you slip off the search engines. Without permanence, bold ideas like 'news as conversation' fall away, because you're shutting down the conversation before it has barely started. Without permanence, you might be on the web, but you're certainly not part of it.
     From The Importance of Being Permanent, a PressThink article by Simon Waldman, the Director of Digital Publishing for The Guardian Newspapers.
Posted by Chris Hodge at 02:58 PM | Permalink | TrackBack | Links to this post
Categories: Information Studies

January 05, 2005

Security: Windows vs. Linux

     Koetzle, L. (2004). Is Linux More Secure Than Windows? Forrester Research, Cambridge, Mass.
     Petreley, N. (2004). Security Report: Windows vs. Linux. The Register. (Published October 22, 2004 and retrieved January 5, 2005.)

     Koetzle's paper was published in March 2004 and compares Debian, MandrakeSoft, Microsoft, Red Hat and SuSE. Each platform was evaluated based on data gathered between June 1, 2002 and May 31, 2003, according to four metrics — "all days of risk," quantifying the platform's actual vulnerability to attack; "distirbution days of risk," comparing the Linux distributors' responsvieness to a vulnerability; "flaws fixed," measuring the platform maintainers' thoroughness, and the percentage of high-severity vulnerabilities. Among the study's findings: Microsoft demonstrated the lowest average "all days of risk," and Red Hat and Microsoft tied in terms of relative severity and thoroughness.
     Petreley's study, published in October 2004, compared Microsoft Windows Server 2003 and Red Hat Enterprise Linux AS v.3, based on the severity of the security vulnerability (determined by the damage potential, the exploitation potential, and the exposure potential), and the number of critically severe vulnerabilities. Petreley found that whereas 10% of Red Hat's patches and alerts addressed critical vulnerabilities, 38% of Microsoft's patches and alerts addressed vulnerabilities ranked by Microsoft as critical. The report also includes a detailed discussion of security and severity metrics.
Posted by Chris Hodge at 04:08 PM | Permalink | TrackBack | Links to this post
Categories: Open Source | Security

January 04, 2005

Royalty-Free Videos Now Available From Discovery Education

     Subscribers to Discovery Education's unitedstreaming video-on-demand service now have access to more than 1,000 video clips that have been copyright-cleared by their producers for editing or reproduction by teachers and students in class projects. [More from eSchool News]
Posted by Chris Hodge at 04:30 PM | Permalink | TrackBack | Links to this post
Categories: AudioVideo-over-IP

The Economics of Open Source

     Dalle, J.-M. et al. (2004). Advancing Economic Research in the Free and Open Source Software Mode of Production. Forthcoming in Building Our Digital Future: Future Economic, Social and Cultural Scenarios Based On Open Standards, edited by Marleen Wynants and Jan Cornelis. Brussels: Vrjie Universiteit Brussels (VUB) Press.
     Lerner, J. and J. Tirole. (2004). The Economics of Technology Sharing: Open Source and Beyond. Working Paper no. 10956, NBER, Cambridge, Mass.

     There are a number of reasons why universities are slow to adopt open source software; one is the perception that the open source mode of production is not a viable economic model, i.e., that it is not sustainable over time. The two articles cited above are part of a growing body of literature demonstrating that open source initiatives are not only viable, but interesting.
     Lerner and Tirole provide a brief history of open source software, motivations for participating in open source development, the relative quality of open source software, public policy toward open source, the role software patents play, and areas for further research. Of particular interest is their section on parallels between open source and academia, and where academia could benefit from adopting the open source model. Two examples discussed are sharing datasets or constructing large multi-institutional resources, a "strategy [that] might be especially effective for those at smaller and less centrally located institutions"; and, secondly, requiring that published works remain publicly accessible, rather than ceding copyright to publishers.
     J.-M. Dalle et al. seeks to redirect research away from the study of why people participate in open source projects, which the authors describe as neither unique nor hsitorically unprecedented, and toward the modes of organization, governance and performance of open source initiatives, "in order to to assess the potentialities of the 'open source way of working' as a paradigm for a broader class of knowledge and information-goods production." The authors describe four areas for further investigation: the emerging importance of new standards, such as XML; the relationship between open source and peer-to-peer networking as a means of distribution; the development of reputation systems within open source communities; and the interface between open-source distribution and other forms of pubication and distribution.
Posted by Chris Hodge at 04:14 PM | Permalink | TrackBack | Links to this post
Categories: Open Source