Color is an inner, highly subjective experience only triggered by properties of light from the external world. Actual color perceptions are inextricably linked to (i) visual processing properties of observers that can vary greatly across individuals, and (ii) minor changes in viewing circumstances. Thus, it can be argued that color is not of this world, or, that color is not a veridical, or eve...

Abstract– In this document we report on a set of simulation experiments that were conducted to evaluate the Task Graph (TG) protocol as outlined in [1]. The experiments allowed us to identify sources of poor performance due to TCP and other TG protocol related timers. Through these experiments we were able to choose appropriate timer values and achieve better results. We also measured performan...

Our approach to the automatic acquisition of disjointness axioms relies on a machine learning classifier that determines disjointness of any two classes. The classifier is trained based on a “Gold Standard” of manually created disjointness axioms, i.e. pairs of classes each of which is associated with a label – “disjoint” or “not disjoint” – and a vector of feature values. As in our earlier exp...

2 Publish / Subscribe Systems Publish / Subscribe systems consist of publishers, which publish messages, and subscribers, which subscribe to certain topics of messages. Generally these messages can be any kind of information, but in our case we have focused on event notifications. The difficulty of such a system is the distribution of the published objects to the correct subscribers. In the sem...

A method of image segmentation has been developed based on creating links between pixels in successive layers of a "pyramid" of reduced-resolution versions of the image. In the original implementation of this method, the links were based on comparing the values of a single feature, (average) gray level, for each pixel. In this note, the method is extended to links based on multiple features, su...

The use of craniotomy to approach supratentorial lesions is quite well established in the literature. The use of craniotomy for posterior fossa approaches, however, is not well described. The aim of this article is to describe the technical aspects of this approach and to delineate the important landmarks. In our cases, posterior fossa craniotomies have been utilized for treat different patholo...

The National Aeronautics and Space Act of 1958 established NASA and charged it to "provide for the widest practicable and appropriate dissemination of information concerning [...] its activities and the results thereof." The search for innovative methods to distribute NASA's information lead a grass-roots team to create the NASA Technical Report Server (NTRS), which uses the World Wide Web and ...

Semantic annotation is a key component for the realization of the Semantic Web. The volume of existing and new documents on the Web makes manual annotation problematic. Semi-automatic methods have been designed to alleviate the burden, and these methods have begun to be implemented with Semantic Annotation Platforms (SAPs). SAPs provide services that support annotation, including ontologies, kn...

Our team TsinghuaHephaestus was established in 2003 as a part of the Lab for Robot Intelligent Control, Department of Automation, Tsinghua University. With the research interests on robotics and artificial intelligence, our software for robot soccer was developed on Aibo ERS-210A, in which many basic skills were learned from other teams. In November 2004, we bought Aibo ERS-7 and started to wor...