scholarly journals SITES AquaNet : An open infrastructure for mesocosm experiments with high frequency sensor monitoring across lakes

2021 ◽  
Author(s):  
P. Urrutia‐Cordero ◽  
O. Langvall ◽  
P. Blomkvist ◽  
D.G. Angeler ◽  
S. Bertilsson ◽  
...  
Keyword(s):  
High Frequency ◽  
Frequency Sensor ◽  
Mesocosm Experiments ◽  
Sensor Monitoring

scholarly journals How Good Is the STW Sensor? An Account from a Larger Shipping Company

2021 ◽  
Vol 9 (5) ◽  
pp. 465
Author(s):  
Angelos Ikonomakis ◽  
Ulrik Dam Nielsen ◽  
Klaus Kähler Holst ◽  
Jesper Dietz ◽  
Roberto Galeazzi
Keyword(s):  
High Frequency ◽  
Additional Data ◽  
Empirical Method ◽  
Influential Factor ◽  
Sensor Data ◽  
Sea State ◽  
Shipping Company ◽  
Frequency Sensor ◽  
Semi Empirical

This paper examines the statistical properties and the quality of the speed through water (STW) measurement based on data extracted from almost 200 container ships of Maersk Line’s fleet for 3 years of operation. The analysis uses high-frequency sensor data along with additional data sources derived from external providers. The interest of the study has its background in the accuracy of STW measurement as the most important parameter in the assessment of a ship’s performance analysis. The paper contains a thorough analysis of the measurements assumed to be related with the STW error, along with a descriptive decomposition of the main variables by sea region including sea state, vessel class, vessel IMO number and manufacturer of the speed-log installed in each ship. The paper suggests a semi-empirical method using a threshold to identify potential error in a ship’s STW measurement. The study revealed that the sea region is the most influential factor for the STW accuracy and that 26% of the ships of the dataset’s fleet warrant further investigation.

scholarly journals Multimachine Data–Based Prediction of High-Frequency Sensor Signal Noise for Resistive Wall Mode Control in ITER

2016 ◽  
Vol 70 (3) ◽  
pp. 387-405 ◽  
Author(s):  
Yueqiang Liu ◽  
S. A. Sabbagh ◽  
I. T. Chapman ◽  
S. Gerasimov ◽  
Y. Gribov ◽  
...  
Keyword(s):  
High Frequency ◽  
Sensor Signal ◽  
Signal Noise ◽  
Mode Control ◽  
Resistive Wall Mode ◽  
Frequency Sensor ◽  
Resistive Wall

Development of Novel Magnetostrictive Fe-Co-B Thin Films as a High Frequency Sensor Platform

2015 ◽  
Vol 1720 ◽  
Author(s):  
Zhizhi Sheng ◽  
Z.-Y. Cheng
Keyword(s):  
Thin Films ◽  
High Frequency ◽  
Deposition Time ◽  
Nanocrystalline Structure ◽  
Deposition Condition ◽  
Potential Candidate ◽  
Q Value ◽  
Resonance Behavior ◽  
Frequency Sensor ◽  
Sensor Platform

ABSTRACTFe-Co-B was identified as a potential candidate for the development of high-frequency sensors and high-frequency actuators. To fabricate high-frequency magnetostrictive resonators, Fe-Co-B magetostrictive thin films were prepared by combining electrochemical deposition and microfabrication processes. It is crucial to obtain thin films with proper microstructure and composition. Results showed that Fe-rich Fe-Co-B thin films exhibited better resonance behavior than those with Co-rich and equiatomic Fe and Co compositions. It is also found that the deposition condition plays an important role on the performance of the films. Fe55Co28B17 thin films were fabricated under the same current density for different times. The films exhibited nanocrystalline structure, circular nodules as surface morphology and good resonance behavior. Fe/Co ratio on surface and cross section slightly decreased with increasing the deposition time. The resonance frequency slightly increased and the Q value was found to decrease with increasing deposition time.

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