Myself and my colleague Tammy DiPrima have implemented WebID authentication and provisioning for VIVO (http://www.vivoweb.org).  WebID is a way to uniquely identify people and agents with a URI and provide a central identity and authentication system based on digital certificates.  WebID is being developed by the W3C WebID Community group. VIVO is a faculty/researcher profile system developed by Cornell, University of Florida, Indiana University, Washington University in St.

Apache RDF PipeLogger Agent Beta 1 Released

I have released the beta 1 version of my RDF PipeLogger on GitHub https://github.com/ebremer/PipeLogger under the BSD 3-Clause License.  The program is still being tested but appears to be stable enough for a beta release.  The project was developed in NetBean 7.3 using JDK 1.7.0_17.

My test server currently uses the following LogFormat config with potential simplifications indicated with individual line comments:

Configuring the Apache HTTP Server to generate logs in RDF Turtle

Each time I get a complaint that one of my web servers is running slow, the first thing I do is look at the Apache httpd logs.  For anyone familiar with Apache HTTP Server logs, they are not particularly useful when trying to analyze huge amounts logging information.  Trying to figure out what client(s) may or may not be misbehaving usually requires some log analysis tool whether commercial or open-source.  As it is, the http server logs alone do not tell a complete story of what is going on.

RDF Triples over HTML5 WebSockets

From the beginning, I wanted Nexus to be a collaborative visualization system allowing multiple clients in multiple locations to see the same visualizations in real-time.  The issue that arises here is knowing "where" in the 3D semantic web visualization the other clients (people/avatars) are and what direction they are looking at.  In the 3D digital world, you have the concept of a "camera".  This is essentially your point-of-view in a particular 3D simulation.  As the camera moves, your view of the model changes as well.  In order to know where the other clients are in the simulation

SPARQL 1.1 Controlled 3D RDF Visualization - from a Force-Directed Layout to a Molecular Visualization of DNA using Nexus in OpenSimulator

Nexus is an experiment with Semantic Web RDF data visualized in three dimensiodians that can be done collaboratively amongst many people (and concurrently) at disparate locations.  Nexus also acts as a platform to try out various design ideas, technologies, and methodologies.  The original Nexus


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