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This paper describes and exemplifies an application of AutoMark, a software system developed in pursuit of robust computerised marking of free-text answers to open-ended questions. AutoMark employs the techniques of Information Extraction to provide computerised marking of short free-text responses. The system incorporates a number of processing modules(More)
Antigen injection into animals causes antigen-specific T cells to become activated and, rapidly thereafter, die. This antigen-induced death is inhibited by inflammation. To find out how inflammation has this effect, various cytokines were tested for their ability to interfere with the rapid death of activated T cells. T cells were activated in vivo,(More)
These studies tested whether antigenic competition between T cells occurs. We generated CD8(+) T cell responses in H-2(b) mice against the dominant ovalbumin epitope SIINFEKL (ova8) and subdominant epitope KRVVFDKL, using either vaccinia virus expressing ovalbumin (VV-ova) or peptide-pulsed dendritic cells. CD8(+) T cell responses were visualized by major(More)
An often-cited advantage of connectionist networks is that they degrade gracefully under damage. Most demonstrations of the effects of damage and subsequent relearning in these networks have only looked at very general measures of performance. More recent studies suggest that damage in connectionist networks can reproduce the specific patterns of behavior(More)
We investigated the mechanism by which alpha/beta T cells expand upon transfer to T cell-deficient host mice by injecting carboxyfluorescein diacetate succinimidyl ester-labeled T cells into mice depleted of T cells by sublethal irradiation. We found that CD4+ T cells divided when transferred to irradiated hosts and that the division of more than half of(More)
This dissertation presents the complete integrated planning, executing and learning robotic agent Rogue. Physical domains are notoriously hard to model completely and correctly. Robotics researchers have developed learning algorithms to successfully tune operational parameters. Instead of improving low-level actuator control, our work focusses instead at(More)
The views and conclusions contained in this document are those of the author and should not be interpreted as representing the official policies, either expressed or implied, of any sponsoring institution, the U.S. government or any other entity. Abstract In a preference aggregation setting, a group of agents must jointly make a decision, based on the(More)