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Related Concept Videos

Assessment of apical radial pulse01:25

Assessment of apical radial pulse

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Apical-Radial (A-R) Pulse Assessment
The A-R pulse assessment involves simultaneous evaluation of the apical and radial pulses. When the apical and radial pulse rates vary, this assessment helps identify a pulse deficit.
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Assessment of radial pulse01:11

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Assessment of Radial Pulse
The radial pulse, located at the wrist, is often the preferred site for assessing peripheral pulse because of its accessibility and dependability. The process of determining the radial pulse involves several steps:
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Frequency-Domain Interpretation of PD Control01:24

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Proportional-Derivative (PD) controllers are widely used in fan control systems to improve stability and performance. A fan control system can be effectively represented using a Bode plot to illustrate the impact of a PD controller through its transfer function. The Bode plot visually conveys how PD control modifies the fan's response across various frequencies, providing a frequency domain interpretation of the controller's behavior.
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Related Experiment Video

Updated: Sep 25, 2025

Quantification of Global Diastolic Function by Kinematic Modeling-based Analysis of Transmitral Flow via the Parametrized Diastolic Filling Formalism
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Pulse shape analysis in Gerda Phase II.

M Agostini1,2, G Araujo3, A M Bakalyarov4

  • 1Department of Physics and Astronomy, University College London, London, UK.

The European Physical Journal. C, Particles and Fields
|April 25, 2022
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Summary
This summary is machine-generated.

The GERmanium Detector Array (Gerda) experiment searched for neutrinoless double-beta decay in Germanium-76. Advanced pulse shape analysis significantly reduced background, improving sensitivity for this rare nuclear decay search.

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Area of Science:

  • Nuclear physics
  • Particle physics
  • Astroparticle physics

Background:

  • Searched for neutrinoless double-beta decay in 76Ge.
  • Utilized enriched high-purity germanium detectors at Laboratori Nazionali del Gran Sasso.
  • Phase II (2015-2019) incorporated upgrades like LAr veto and increased detector mass.

Purpose of the Study:

  • To describe background mitigation methods for Gerda Phase II.
  • To evaluate pulse shape discrimination performance using calibration and physics data.
  • To report on an exposure of 103.7 kg year.

Main Methods:

  • Employed topological discrimination via pulse shape analysis.
  • Utilized data from Thorium-228 calibrations and physics data.
  • Applied methods to suppress background in the region of interest around 2039 keV.

Main Results:

  • Background suppressed by a factor of approximately 5.
  • Preserved a significant fraction of the signal.
  • Provided an exhaustive list of parameters used in the final data analysis.

Conclusions:

  • Pulse shape analysis is a powerful tool for background mitigation.
  • Gerda Phase II achieved enhanced sensitivity for neutrinoless double-beta decay searches.
  • The described methods contribute to the ongoing search for this fundamental process.