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Related Concept Videos

Beams with Symmetric Loadings01:15

Beams with Symmetric Loadings

The moment-area method is an analytical tool used in structural engineering to determine the slope and deflection of beams under various loads. Consider a cantilever with a concentrated load and moment at the free end. The first step is constructing a free-body diagram to calculate the reactions at the fixed end. Next, the bending moment diagram is plotted to visualize how the bending moment varies along the beam's length, focusing on points where the bending moment equals zero.
The M/EI...
Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
Beams01:30

Beams

Beams are integral components of structural engineering and construction, designed to support loads applied at various points along their length. These long, straight members can be classified based on geometry, cross-section, support type, and equilibrium condition.
Based on geometry, beams can be straight, tapered, or curved. Straight beams are the most common type and have a constant cross-section throughout their length. Tapered beams, on the other hand, have a varying cross-section along...
Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
Transmission Line Design Considerations01:23

Transmission Line Design Considerations

Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
Prismatic Beams: Problem Solving01:15

Prismatic Beams: Problem Solving

In the design of a supported timber beam subjected to a distributed load, both the beam's physical dimensions and the timber's characteristics, such as its grade and species, are critical. These factors determine the allowable stress values, which are crucial for calculating the necessary beam depth to ensure structural integrity and safety.
The design begins with analyzing the beam as a free body to identify moments and force balances, thereby determining support reactions. Next, the designer...

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Related Experiment Video

Updated: Jun 22, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Broadcast MIMO over multimode optical interconnects by modal beamforming.

Amos Agmon, Moshe Nazarathy

    Optics Express
    |June 25, 2009
    PubMed
    Summary
    This summary is machine-generated.

    We present broadcast MIMO communication systems for optical fibers using BeamForming (BF). This technology creates separate channels for multiple receivers, enabling 100 Gb/s short-reach data transmission.

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    Writing Bragg Gratings in Multicore Fibers
    08:48

    Writing Bragg Gratings in Multicore Fibers

    Published on: April 20, 2016

    Related Experiment Videos

    Last Updated: Jun 22, 2026

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

    Writing Bragg Gratings in Multicore Fibers
    08:48

    Writing Bragg Gratings in Multicore Fibers

    Published on: April 20, 2016

    Area of Science:

    • Optical communications
    • Wireless communication systems
    • Signal processing

    Background:

    • Multiple-Input Multiple-Output (MIMO) systems are crucial for high-speed wireless communication.
    • Existing optical interconnects face limitations in capacity and receiver coordination.
    • BeamForming (BF) techniques have advanced wireless MIMO but require adaptation for optical systems.

    Purpose of the Study:

    • To introduce broadcast MIMO communication systems over multimode optical fibers.
    • To enable decoupled virtual subchannels for multiple uncoordinated receivers.
    • To extend Zero-Forcing BF techniques to optical quadratic detection.

    Main Methods:

    • Implementation of BeamForming (BF) at the transmitter.
    • Utilizing multimode optical fibers or waveguides for signal transmission.
    • Extending wireless MIMO BF techniques to optical quadratic detection.

    Main Results:

    • Decoupled virtual subchannels are successfully provided to multiple receivers.
    • The optical technique is applicable to short-reach point-to-(multi)point transmission.
    • Achieved data rates of 100 Gb/s over distances up to 100 m.

    Conclusions:

    • Broadcast MIMO over optical fibers offers a viable solution for high-capacity short-reach interconnects.
    • The proposed BF technique effectively supports multiple uncoordinated receivers.
    • This approach enhances the capabilities of photonic interconnects for future data transmission needs.