The Fuce processor: The Execution Model and The Programming Methodologies

Nowadays, development of processors which support concurrent multi-thread execution is becoming a trend. Most of these processors are aimed at exploiting instruction level parallelism (ILP). But many researchers feel that the limits of ILP exploitation are rapidly being reached. In addition, exploiting more ILP makes the circuitry of processor very complicated. We are taking another simpler approach, and developing a processor focused only on thread level parallelism (TLP). Our processor is named Fuce. it is based on the continuation model which is derived from the dataflow computing model. In this paper, we introduce the core concepts of Fuce, the programming model for Fuce and an overview of Fuce architecture. We also show simulation results.

From Computer Networks to Agent Networks

From the 1990s on, one of the most important challenges facing computer science researchers has been the design and construction of software tools to exploit Internet computing. At the same time, the development of agent technology has gone hand in hand with the explosion of the Internet. As worldwide network computing environments become more and more complex, software agents are believed to have the potential to help present and manage the Internet in an autonomous or semi-autonomous way. Yet, to date, a number of fundamental questions about the theory and practice of this new software engineering paradigm have remained unanswered. Here we will explore the features that make the agent-based approach such an appealing and evolutionary computational model. In particular, we envision a global agent-based distributed computing architecture that provides a convenient programming abstraction and sufficient transparency. This paper gives a general introduction to the underlying concepts of our research and development both at the level of design philosophy and in practical implementation techniques. It will be argued that the shift from computer networks to agent networks is a significant extension of network programming technology because agents are well suited to modeling, designing and implementing scalable, flexible and secure distributed systems over a worldwide computing environment.

An Agent-Oriented Personalized Web Searching

Web retrieval is now one of the most important issues in computer science, and we believe that applying multi-agent systems to this area is a promising approach. We introduce Kodama system, which is being developed and in use at Kyushu University, as a multi-agent-based approach to build a distributed Information Retrieval (IR) system that lets users retrieve relevant distributed information from the Web. We reported methods to agentify the Web, and to cluster the agentified domain into communities. In order to investigate the performance of our system, we carried out several experiments in multiple Server Agent domains and developed a smart query routing mechanism for routing the user's query. The results ensure that the idea of Web page agentification, clustering and routing techniques promise to achieve more relevant information

Effect of neonatal hypoxia on the development of intraspinal serotonergic fibers in relation to spinal motoneurons

http://dx.doi.org/10.1016/j.braindev.2008.12.009Serotonin (5-hydroxytryptamine; 5-HT)-containing neurons trophically affect target neurons and modulate central nervous system neuronal activity. We studied effects of neonatal hypoxia on postnatal development of intraspinal 5-HT fibers in spinal motoneuron pools. Postnatal day (PND) 0 Sprague–Dawley rats received a hypoxic load and survivors were used for histological analyzes on PNDs 1, 7, and 14. Spinal motoneurons were labeled using choleratoxin B subunit as a retrograde neurotracer, and 5-HT fibers were detected immunohistochemically. On PND 1, 5-HT fibers were present in the lateral portion of the ventral horn at the cervical level, but were sparsely distributed at the lumbar level. On PND 14, cervical and lumbar level distributions were nearly identical. The 5-HT fibers and varicosities in close apposition to motoneurons increased from PNDs 1–14, however, the close apposition of cervical motoneurons was significantly different from lumbar motoneurons only on PND 1. Density of 5-HT fibers in control and hypoxic rats was not different on PND 1, while those in hypoxic rats were significantly reduced on PND 14. Close appositions of lumbar motoneurons were reduced more than cervical MNs after neonatal hypoxia. Neurodevelopmental deficit after neonatal hypoxia with a rostro-caudal gradient is associated with significant changes in the 5-HT system