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Bacterial Signaling

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Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
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Related Experiment Video

Updated: May 17, 2025

Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing
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A Novel Grouting Diffusion Monitoring System Based on ZigBee Wireless Sensor Network.

Xiangpeng Wang1,2, Tingkai Wang3, Jinyu Gao3

  • 1Key Laboratory of Earth Exploration and Information Technology of Ministry of Education, Chengdu University of Technology, Chengdu 610059, China.

Sensors (Basel, Switzerland)
|May 14, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a new wireless system for real-time monitoring of grouting effectiveness using apparent resistivity. The system ensures accurate measurements and reliable communication, improving construction operations.

Keywords:
ZigBeeapparent resistivitydiffusion monitoringgrouting effectivenessnon-destructive

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Area of Science:

  • Geophysics and Civil Engineering
  • Sensor Networks and Wireless Communication

Background:

  • Grouting effectiveness evaluation is critical in civil engineering due to unpredictable subsurface conditions.
  • Current methods for assessing grouting are often destructive, costly, and provide limited data.
  • There is a need for non-destructive, cost-effective, real-time monitoring solutions.

Purpose of the Study:

  • To develop and validate a novel wireless real-time monitoring system for evaluating grouting effectiveness.
  • To integrate geophysical methods with sensor network technology for improved data acquisition.
  • To provide a system capable of detailed 3D visualization of grout diffusion.

Main Methods:

  • Implementation of a ZigBee sensor network framework for wireless data transmission.
  • Integration of a direct current geophysical method for apparent resistivity measurements.
  • Development of multichannel data acquisition units and a centralized user control unit.

Main Results:

  • The system demonstrated high voltage measurement accuracy with low ADC noise (175 μV, 188 μV) and minimal sine wave error (4.51 mV, 4.19 mV).
  • Equipment stability was confirmed with low average Relative Standard Deviation (RSD) of 2.86% and 2.92% in field conditions.
  • ZigBee network performance showed a packet loss rate (PLR) below 2% up to 50m, ensuring reliable communication.

Conclusions:

  • The developed wireless system effectively monitors grouting effectiveness in real time.
  • The system enables simultaneous multi-profile monitoring and 3D inversion imaging of grout diffusion.
  • This technology offers valuable insights for optimizing construction, enhancing grouting efficiency, and improving project outcomes.