scholarly journals Beehive Air Sampling and Sensing Device Operation in Apicultural Applications—Methodological and Technical Aspects

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4019
Author(s):  
Andrzej Szczurek ◽  
Monika Maciejewska
Keyword(s):  
Gas Sensing ◽  
Operation Mode ◽  
Air Sampling ◽  
Sampling Point ◽  
Sampling System ◽  
Point Selection ◽  
Bee Colony ◽  
Temporal Aspects ◽  
High Quality Information ◽  
Device Operation

The basis of effective beekeeping is the information about the state of the bee colony. A rich source of respective information is beehive air. This source may be explored by applying gas sensing. It allows for classifying bee colony states based on beehive air measurements. In this work, we discussed the essential aspects of beehive air sampling and sensing device operation in apicultural applications. They are the sampling method (diffusive vs. dynamic, temporal aspects), sampling system (sample probe, sampling point selection, sample conditioning unit and sample delivery system) and device operation mode (‘exposure-cleaning’ operation). It was demonstrated how factors associated with the beehive, bee colony and ambient environment define prerequisites for these elements of the measuring instrument. These requirements have to be respected in order to assure high accuracy of measurement and high-quality information. The presented results are primarily based on the field measurement study performed in summer 2020, in three apiaries, in various meteorological conditions. Two exemplars of a prototype gas sensing device were used. These sensor devices were constructed according to our original concept.

scholarly journals A Three-Dimensional Visualization Framework for Underground Geohazard Recognition on Urban Road-Facing GPR Data

2020 ◽  
Vol 9 (11) ◽  
pp. 668
Author(s):  
Zhenwu Wang ◽  
Benting Wan ◽  
Mengjie Han
Keyword(s):  
Three Dimensional ◽  
Pso Algorithm ◽  
Sampling Point ◽  
Compute Unified Device Architecture ◽  
Point Selection ◽  
Triangulated Irregular Network ◽  
Device Architecture ◽  
Ground Penetrating ◽  
Geometry Method ◽  
Difficult Issue

The identification of underground geohazards is always a difficult issue in the field of underground public safety. This study proposes an interactive visualization framework for underground geohazard recognition on urban roads, which constructs a whole recognition workflow by incorporating data collection, preprocessing, modeling, rendering and analyzing. In this framework, two proposed sampling point selection methods have been adopted to enhance the interpolated accuracy for the Kriging algorithm based on ground penetrating radar (GPR) technology. An improved Kriging algorithm was put forward, which applies a particle swarm optimization (PSO) algorithm to optimize the Kriging parameters and adopts in parallel the Compute Unified Device Architecture (CUDA) to run the PSO algorithm on the GPU side in order to raise the interpolated efficiency. Furthermore, a layer-constrained triangulated irregular network algorithm was proposed to construct the 3D geohazard bodies and the space geometry method was used to compute their volume information. The study also presents an implementation system to demonstrate the application of the framework and its related algorithms. This system makes a significant contribution to the demonstration and understanding of underground geohazard recognition in a three-dimensional environment.

A Strategy to Improve O2 Gas Response of La-SnO2 Nanofibers Based Sensor through Temperature Modulation

2019 ◽  
Vol 944 ◽  
pp. 657-665
Author(s):  
Ya Xiong ◽  
Hui Li ◽  
Tian Chao Guo ◽  
Qing Zhong Xue
Keyword(s):  
Gas Sensors ◽  
Gas Sensing ◽  
Operation Mode ◽  
Temperature Modulation ◽  
Oxide Semiconductors ◽  
Oxygen Ions ◽  
Isothermal Test ◽  
Sensor Temperature ◽  
Heating Energy Consumption ◽  
Gas Response

Generally sensing mechanisms of gas sensors based on metal-oxide semiconductors greatly depend on temperature, suggesting temperature modulation can be applied as a vital method to effectively enhance the sensor response. In this paper, we reported a strategy of quick-cooling operating temperature mode in the course of gas sensing process to elevate the O2 gas response while maintaining low heating energy consumption. La-SnO2 nanofibers synthesized by electrospinning were chosen as gas sensing materials. The O2 gas responses by employing quick-cooling operation mode are significantly improved compared with those obtained by traditional isothermal test. The improved O2 response is contributed to a higher coverage of negatively charged oxygen ions as a result of quick cooling. Our research offers a facile route to detect gas at low temperature with high response. More importantly, the strategy demonstrated here could also be extended to other gas sensor as long as its gas response is related to the sensor temperature.

scholarly journals Electrochemical Detection of Airborne Influenza Virus using Air Sampling System

2018 ◽  
Vol 18 (11) ◽  
pp. 2721-2727 ◽  
Author(s):  
Hyeong-U Kim ◽  
Junhong Min ◽  
Geunsang Park ◽  
Dongjoo Shin ◽  
Giwoon Sung ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Electrochemical Detection ◽  
Air Sampling ◽  
Sampling System

scholarly journals Development of an Air Sampling System for the True Eddy Accumulation Technique

2004 ◽  
Vol 60 (4) ◽  
pp. 263-272 ◽  
Author(s):  
Daisuke KOMORI ◽  
Masatoshi AOKI ◽  
Tomoyasu ISHIDA ◽  
Satoru SUZUKI ◽  
Takashi SATOU ◽  
...  
Keyword(s):  
Air Sampling ◽  
Sampling System

scholarly journals Air sampling for detection of infectious laryngotracheitis (ILT) in commercial poultry flocks.

2020 ◽  
Author(s):  
Lauren Brown ◽  
Dilhani Premaratna ◽  
Yonatan Segal ◽  
Travis Beddoe
Keyword(s):  
Direct Detection ◽  
Air Sampling ◽  
Economic Losses ◽  
Test Case ◽  
Sampling System ◽  
Air Samples ◽  
Gallid Herpesvirus ◽  
Infectious Laryngotracheitis ◽  
Commercial Poultry ◽  
Herpesvirus 1

Abstract Objective Infectious laryngotracheitis (ILT) is an acute and highly contagious viral respiratory disease of poultry, caused by gallid herpesvirus 1 (ILTV), which causes significant economic losses. Due to recent outbreaks of ILT in Australia, it has been proposed that ILT could be transmitted between poultry sheds by the wind; however, there has never been direct detection of gallid herpesvirus 1 from air samples. We aimed to optimize a sampling system for recovery and detection of airborne gallid herpesvirus 1 in poultry sheds. Results Poultry farms with a known clinical outbreaks of ILT were used as a test case for detection of airborne gallid herpesvirus 1. Using a liquid cyclonic impinging device, it was found that recovery and detection of airborne gallid herpesvirus 1 was possible in alkaline PEG buffer. Additional sampling was performed at different heights to determine the presence of ILTV in the air. In farm 3, all three air samples at both heights were positive for ILVT while at farm 2 only one sample at 45cm was positive. We envisaged in the future air sampling will be able to detect and track potential transmission of gallid herpesvirus 1 both inside and outside of the poultry shed.

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