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Related Concept Videos

Multimachine Stability01:25

Multimachine Stability

Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
Parallel Processing01:20

Parallel Processing

The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
Mesh Analysis01:20

Mesh Analysis

Mesh analysis is a valuable method for simplifying circuit analysis using mesh currents as key circuit variables. Unlike nodal analysis, which focuses on determining unknown voltages, mesh analysis applies Kirchhoff's voltage law (KVL) to find unknown currents within a circuit. This method is particularly convenient in reducing the number of simultaneous equations that need to be solved.
A fundamental concept in mesh analysis is the definition of meshes and mesh currents. A mesh is a closed...
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
Ampere-Maxwell's Law: Problem-Solving01:17

Ampere-Maxwell's Law: Problem-Solving

A parallel-plate capacitor with capacitance C, whose plates have area A and separation distance d, is connected to a resistor R and a battery of voltage V. The current starts to flow at t = 0. What is the displacement current between the capacitor plates at time t? From the properties of the capacitor, what is the corresponding real current?
To solve the problem, we can use the equations from the analysis of an RC circuit and Maxwell's version of Ampère's law.
For the first part of the problem,...

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Related Experiment Video

Updated: Jun 6, 2026

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
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Published on: September 25, 2020

Experimental demonstration of the optical multi-mesh hypercube: scaleable interconnection network for multiprocessors

A Louri, S Furlonge, C Neocleous

    Applied Optics
    |December 15, 2010
    PubMed
    Summary

    A novel optical multi-mesh hypercube (OMMH) network prototype achieves 150-Mbit/s data rates with a low bit error rate using commercial devices. This scalable architecture merges hypercube and mesh network advantages for efficient optical interconnections.

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    Area of Science:

    • * Optical interconnection networks
    • * Network topology and architecture

    Background:

    • * Existing scaleable networks often compromise on features like diameter, connectivity, or node degree.
    • * The optical multi-mesh hypercube (OMMH) aims to combine the benefits of hypercube and mesh architectures.
    • * Addressing limitations in current optical interconnects requires novel, scalable solutions.

    Purpose of the Study:

    • * To experimentally demonstrate a prototype of the optical multi-mesh hypercube (OMMH) network.
    • * To evaluate the performance of the OMMH at high data rates and low bit error rates.
    • * To showcase a hybrid optical implementation strategy for scaleable interconnection networks.

    Main Methods:

    • * Experimental demonstration of a prototype optical multi-mesh hypercube (OMMH) network.
    • * Utilized commercially available devices, including vertical-cavity surface-emitting laser (VCSEL) arrays and Optobus fiber interconnects.
    • * Implemented a two-level optical connection strategy: high-density local connections (hypercube) and high-bit-rate long connections (mesh).

    Main Results:

    • * Achieved a data rate of 150 Mbit/s with a bit error rate of 10(-13)/link.
    • * Successfully integrated free-space imaging systems (VCSEL arrays, holography) for local connections and Optobus for long-distance links.
    • * Optimized the OMMH for Motorola's Optobus data rate.

    Conclusions:

    • * The optical multi-mesh hypercube (OMMH) is a viable and scaleable topology for optical interconnection networks.
    • * The hybrid optical implementation effectively combines different connection strategies for optimal performance.
    • * Challenges related to holographic fan-out, alignment sensitivity, and VCSEL power were identified for future improvements.