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Related Concept Videos

Mesh Analysis for AC Circuits01:12

Mesh Analysis for AC Circuits

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In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
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Mesh Analysis01:20

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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.
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Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the  phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and...
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Mesh Analysis with Current Sources01:10

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Mesh analysis becomes simpler when analyzing circuits with current sources, whether independent or dependent. The presence of current sources reduces the number of equations required for analysis. Two cases illustrate this:
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Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked.  In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
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Promoting wired links in wireless mesh networks: an efficient engineering solution.

Behrang Barekatain1, Kaamran Raahemifar1, Alfonso Ariza Quintana2

  • 1Electrical & Computer Engineering Department, Ryerson University, Toronto, Ontario, Canada.

Plos One
|March 21, 2015
PubMed
Summary
This summary is machine-generated.

Wireless Mesh Networks (WMNs) performance for video streaming is improved by the Wireless-to-Ethernet-Mesh-Portal-Passageway (WEMPP). This solution enhances network throughput and reduces delay and jitter for better video quality.

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Area of Science:

  • Computer Science
  • Network Engineering

Background:

  • Wireless Mesh Networks (WMNs) face challenges in guaranteeing performance for high-bandwidth applications like video streaming.
  • Existing solutions often require complex modifications to network protocols or hardware.

Purpose of the Study:

  • To propose and evaluate an efficient engineering solution, Wireless-to-Ethernet-Mesh-Portal-Passageway (WEMPP), to enhance WMN performance.
  • To demonstrate WEMPP's effectiveness in improving traffic transmission, particularly for intra-traffic scenarios.

Main Methods:

  • WEMPP was integrated and tested with four common routing protocols: OLSR, DYMO, DYMO with spanning tree, and HWMP.
  • Performance metrics including end-to-end delay, jitter, contentions, interferences, and throughput were analyzed.
  • Implementation feasibility was assessed by examining firmware modification requirements for Ethernet hardware.

Main Results:

  • WEMPP significantly decreased end-to-end delay, jitter, node contentions, and interferences across various network sizes and densities.
  • The solution demonstrated increased network throughput and cost-effectiveness.
  • WEMPP showed substantial performance improvements for all tested routing protocols.

Conclusions:

  • WEMPP offers an easily implementable and effective solution to enhance WMN performance for demanding applications like video streaming.
  • The proposed method improves network efficiency without altering existing routing protocols or upper-layer functionalities.
  • WEMPP leads to demonstrably better video quality for end-users in WMNs.