This paper presents recent progress made in the development of an optical packet and circuit integrated network. From the viewpoint of end users, this is a single network that provides both high-speed, inexpensive services and deterministic-delay, low-data-loss services according to the users’ usage scenario. From the viewpoint of network service providers, this network provides large switching...

A novel architecture for a hardware-based network intrusion detection system (NIDS) is presented in this paper. The system adopts an FPGA-based signature match co-processor as a core for the NIDS. The signature matcher is based on an algorithm that employs simple shift registers, or-gates, and ROMs in which patterns are stored. As compared with related work, experimental results show that the p...

We have constructed a neural network circuit of four clipped, high-gain, integrating operational amplifiers coupled to each other through an array of digitally programmable resistor ladders (MDACs). In addition to fixed-point and cyclic behavior, the circuit exhibits chaotic behavior with complex strange attractors which are approached through period doubling, intermittent attractor expansion a...

Usually the network-throughput maximization problem for constant-bit-rate (CBR) circuit-switched traffic is posed for a fixed offered load profile. Then choices of routes and of admission control policies are sought to achieve maximum throughput (usually under QoS constraints). However, similarly to the notion of channel “capacity,” it is also of interest to determine the “network capacity;” i....

The network design problem with reliability constraints is a problem where, given a finite set of nodes, the objective is a costefficient selection of links and link capacities sufficient to satisfy the node-to-node traffic demands in normal and failed conditions. In this paper, we present a general mathematical model for this problem and a revised formulation which seems particularly appropria...

In a data center, servers communicate with each other to store and handle a large amount of data. Thus, the network within a data center affects the performance of the data center; the lack of bandwidth between servers increases the time to obtain the required data from the other servers. The energy consumption is also one of the important problems in a data center. The energy consumed by the d...

A mixed-signal circuit that can emulate multi-layer perceptron neural networks is presented. The sequential processing provides a tradeoff between speed, power consumption and circuit area, allowing a flexible accommodation of different network structures. The design of the three most critical analog basic blocks of the processor is presented. a) Dynamic analog memories: A technique of switchin...

Circuit-switched networks are emerging as an attractive alternative to conventional packetswitched ones for some types of application, particularly ones involving transferring a large volume of data. The ESLEA Project will use the UKLight circuit-switched network, and its analogues overseas, to demonstrate the usefulness of circuit-switched networks in several applications disciplines. A circui...

When does neuromodulation of a single neuron influence the output of the entire network? We constructed a five-cell circuit in which a neuron is at the center of the circuit and the remaining neurons form two distinct oscillatory subnetworks. All neurons were modeled as modified Morris-Lecar models with a hyperpolarization-activated conductance (ḡh ) in addition to calcium (ḡCa ), potassium (ḡK...