May 5th, 2008
Next Monday (3:00pm, May 13), Fabrizio Petrini will visit and give a presentation on Streaming Applications on the Cell B.E. Processor. Here’s the abstract:
“We increasingly need to process large and complex data volumes to enable near-real-time informed human decisions or automated response actions. Current limitations in I/O and processing capabilities hinder the timely acquisition, processing, and presentation information to decision makers for rapid response. Multi-core processors, such as the Cell B.E. processor, provide an unprecedented computational capability to curb this data deluge. In this talk I will describe the challenge in designing new data streaming algorithms for multi-core processors and and present some recent results obtained with the Cell B.E. processor.”
May 5th, 2008
In this week’s UMBC ebiquity meeting (10am Tue may 6 in ITE 325), PhD student Wenjia Li will talk about his research on security and MANETs. Guests are always welcome — just drop in. Here’s the title and abstract.
Gossip-Based Outlier Detection for Mobile Ad Hoc Networks
Wenjia Li, University of Maryland, Baltimore County
It is well understood that Mobile Ad Hoc Networks (MANETs) are extremely susceptible to a variety of attacks. Many security schemes have been proposed that depend on identifying nodes that are exhibiting malicious behavior such as packet dropping, packet modification, and packet misrouting. We argue that in general, this problem can be viewed as an instance of detecting nodes whose behavior is an outlier when compared to others. In this work, we propose a gossip-based outlier detection algorithm for MANETs. The algorithm leads to a common outlier view amongst distributed nodes with a limited communication overhead. Simulation results demonstrate that the proposed algorithm is efficient and accurate.
May 5th, 2008
Deadlines for submitting papers, Doctoral Consortium applications and tutorial proposals for the Seventh International Semantic Web Conference are fast approaching. ISWC ’08 will be held 26-30 October 2008 in Karlsruhe, Germany. Key upcoming dates include:
- Research papers: due May 9 (title and abstracts), 16 May (full)
- Semantic Web in Use papers: due May 16
- Tutorial proposals: May 16
- Doctoral Consortium applications: due May 16
- Posters & Demo proposals: due July 25
- Workshops papers (13 workshops): mid-summer
- Semantic Web & Billion Triples challenge: Oct 1
- ISWC 2008 CONFERENCE: October 26-30
See the ISWC 2008 site for CFPs and other details. Inquires about specific tracks should be sent to the appropriate chairs. Send general questions and suggestions for panel topics, invited speakers, birds of a feather meetings, etc. to email@example.com.
May 3rd, 2008
David Chapman will defend his MS thesis, A General Algorithm for Gridding Earth Sensing Scanning Instruments, at 10:00am Monday May 5 in room 325 ITE. The abstract is below.
Gridding in remote sensing must re-project observations from their original coordinate system based on satellite orbit and attitude to a grid defined by Earth coordinates. Primitive methods assume that observations are located at points on Earth and typically average observations in grid cells, or interpolate geolocated observations. These approaches are inaccurate, because they do not make use of the instrumentâ€™s footprint geometry, and spatial response. Observation Coverage (Obscov) gridding techniques make use of the satellite optics and geometry to more accurately describe coverage of a footprint on within each grid cell. Obscov gridding provides significant accuracy improvements exceeding 1 Kelvin Brightness Temperature over most regions on Earth for a 12 micron window channel on-board the Atmospheric Infrared Sounder (AIRS). Existing Obscov algorithms are only applicable to specific instruments and depend heavily on implicitly defined spatial response functions. We make use of raycasting and adaptive grid numerical integration to compute Obscov for the spatial response function of any instrument while processing streaming satellite observation data faster than 400 Megabits/second on a 6 machine cluster. We discuss the quality benefits of our algorithm by analyzing the results of gridded AIRS infrared sensor data with 324 operational spectral channels. We also address parallel processing issues to integrate AIRS Obscov gridding with SOAR, an on demand climate processing system built on a 122 processor blade server.
May 2nd, 2008
The call for the ISWC 2008 Sixth Semantic Web Challenge and Billion Triples tracks is out.
“We invite submissions to the sixth annual Semantic Web Challenge, the premiere event for demonstrating practical progress towards achieving the vision of the Semantic Web. The central idea of the Semantic Web is to extend the current human-readable web by encoding some of the semantics of resources in a machine-processable form. Moving beyond syntax opens the door to more advanced applications and functionality on the Web. Computers will be better able to search, process, integrate and present the content of these resources in a meaningful, intelligent manner.
As the core technological building blocks are now in place, the next challenge is to show off the benefits of semantic technologies by developing integrated, easy to use applications that can provide new levels of Web functionality for end users on the Web or within enterprise settings. Applications submitted should demonstrate clear practical value that goes above and beyond what is possible with conventional web technologies alone.
Unlike in previous years, the Semantic Web Challenge of 2008 will consist of two tracks: the Open Track and the Billion Triples Track. The key difference between the two tracks is that the Billion Triples Track requires the participants to make use of the data set –a billion triples– provided by the organizers. The Open Track has no such restrictions.
As before, the Challenge is open to everyone from academia and industry. The authors of the best applications will be awarded prizes and featured prominently at special sessions during the conference”
May 2nd, 2008
The following workshops will be held as part of 2008 international Semantic Web Conference. Watch the 2008 ISWC workshop page for more information, including dates and links to workshop pages.
- Service Matchmaking and Resource Retrieval in the Semantic Web
- Terra Cognita 2008
- 3rd International Workshop on Ontology Matching
- 3rd ExpertFinder Workshop: Personal Identification and Collaborations – Knowledge Mediation and Extraction (PICKME’08)
- 7th Semantic Web Services Challenge Workshop
- 4th International Workshop on Semantic Web Enabled Software Engineering (SWESE2008)
- Workshop on Uncertainty Reasoning for the Semantic Web
- International Workshop on Ontology Dynamics (IWOD2008)
- Nature inspired Reasoning for the Semantic Web (NatuReS)
- Social Data on the Web
- 4th International Workshop on Scalable Semantic Web Knowledge Base Systems (SSWS2008)
- Incentives for the Semantic Web
- Ontology-supported Business Intelligence (OBI 2008)