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Related Concept Videos

Bode Plots Construction01:24

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The Bode plot is an essential tool in control system analysis, mapping the frequency response of a system through a magnitude plot and a phase plot, both against a logarithmic frequency axis. To construct a Bode plot, consider the transfer function H(ω):
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Construction of Root Locus01:15

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The construction of a root locus involves several key steps to analyze and visualize the behavior of a system's poles with varying gain. The number of branches in the root locus equals the number of closed-loop poles and is symmetrical about the real axis.
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A frequency distribution table can be constructed using the steps given below.
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DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
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Types of Errors: Detection and Minimization01:12

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Error is the deviation of the obtained result from the true, expected value or the estimated central value. Errors are expressed in absolute or relative terms.
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Design Example: Dimensioning of Concrete Masonry Construction01:13

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For the construction of a storeroom using concrete masonry units, it's essential to align the dimensions of the structure with the actual sizes of the blocks and the intended mortar joints. On the site in question, there's a stockpile of concrete masonry blocks with a nominal size of eight by eight by sixteen inches, which are to be used in the construction of the storeroom.
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Related Experiment Video

Updated: Feb 10, 2026

Dynamic Navigation in Endodontics: Guided Access Cavity Preparation by Means of a Miniaturized Navigation System
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Miniature ultrasonic probe construction for minimal access surgery.

R J Dickinson1, R I Kitney

  • 1Department of Bioengineering, Imperial College, London SW7 2AZ, UK.

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|September 28, 2004
PubMed
Summary

Minimal access surgery requires advanced imaging. This study details the design of high-frequency, miniaturized ultrasound probes for interventional use, addressing key fabrication challenges.

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Area of Science:

  • Medical imaging
  • Surgical technology
  • Biomedical engineering

Background:

  • Minimal access surgery necessitates specialized imaging tools for intraoperative guidance.
  • Ultrasound offers an interventional imaging modality due to its probe's accessibility.
  • Miniaturized, high-frequency ultrasound probes are crucial for navigating confined surgical sites.

Purpose of the Study:

  • To establish design parameters for miniaturized, high-frequency ultrasound probes for interventional surgery.
  • To address the technical challenges associated with fabricating sub-miniature ultrasound probes.
  • To demonstrate a practical solution through the development of a 1 mm diameter intravascular probe.

Main Methods:

  • Development of design curves correlating element count and frequency with probe dimensions for linear and cylindrical arrays.
  • Investigation of interconnect and packaging solutions for high-frequency, sub-miniature probe construction.
  • Fabrication and testing of a 1 mm diameter intravascular ultrasound probe.

Main Results:

  • Design curves provide a framework for creating ultrasound probes with specific dimensions and frequencies.
  • Identified and addressed critical technical challenges in high-frequency probe fabrication.
  • Successfully produced a functional 1 mm diameter intravascular ultrasound probe.

Conclusions:

  • Miniaturized, high-frequency ultrasound probes are feasible for interventional applications.
  • Addressing interconnect and packaging challenges is key to successful sub-miniature probe development.
  • The developed intravascular probe exemplifies a viable solution for minimally invasive surgical imaging.