scholarly journals High sampling rate thermistor string observations at the slope of Great Meteor Seamount

Ocean Science ◽  
2005 ◽  
Vol 1 (1) ◽  
pp. 17-28 ◽  
Author(s):  
H. van Haren ◽  
R. Groenewegen ◽  
M. Laan ◽  
B. Koster
Keyword(s):  
High Frequency ◽  
North Atlantic Ocean ◽  
Sampling Rate ◽  
Very High Frequency ◽  
High Sampling ◽  
High Sampling Rate ◽  
In Situ Calibration ◽  
Great Meteor Seamount ◽  
Very High

Abstract. A high sampling rate (1 Hz) thermistor string has been built to accommodate the scientific need to accurately monitor high-frequency and vigorous internal wave and overturning processes in the ocean. The thermistors and their custom designed electronics can register temperature at an estimated precision of about 0.001° C with a response time faster than 0.25 s down to depths of 6000 m. With a quick in situ calibration using SBE 911 CTD an absolute accuracy of 0.005° C is obtained. The present string holds 128 sensors at 0.5 m intervals, which are all read-out within 0.5 s. When sampling at 1 Hz, the batteries and the memory capacity of the recorder allow for deployments of up to 2 weeks. In this paper, the instrument is described in some detail. Its performance is illustrated with examples from the first moored observations, which show Kelvin-Helmholtz overturning and very high-frequency (Doppler-shifted) internal waves besides occasionally large turbulent bores moving up the sloping side of Great Meteor Seamount, Canary Basin, North-Atlantic Ocean.

scholarly journals Fast thermistor string observations at the slope of Great Meteor Seamount

2004 ◽  
Vol 1 (1) ◽  
pp. 37-64 ◽  
Author(s):  
H. van Haren ◽  
R. Groenewegen ◽  
M. Laan ◽  
B. Koster
Keyword(s):  
Response Time ◽  
Internal Waves ◽  
North Atlantic ◽  
High Frequency ◽  
North Atlantic Ocean ◽  
Memory Capacity ◽  
Field Observations ◽  
Very High Frequency ◽  
Great Meteor Seamount ◽  
Very High

Abstract. A very fast thermistor string has been built to accommodate the scientific need to accurately monitor fast and vigorous internal wave and overturning processes above sloping bottoms in the ocean. The thermistors and their custom designed electronics can register temperature at an estimated precision of about 1mK with a response time faster than 0.25 s down to depths of 6000 m. The present string holds 128 synoptically measuring sensors at 0.5 m intervals, which are all read-out within 0.5 s. When sampling at 1Hz, the batteries and the memory capacity of the recorder allow for deployments of up to 2 weeks. Detailed examples of the first field observations are presented, which show overturning and very high-frequency (Doppler-shifted) internal waves besides occasionally large turbulent bores moving up the sloping side of Great Meteor Seamount, Canary Basin, North-Atlantic Ocean.

Artemis very high-frequency digital ultrasound-guided repositioning of a free cap after laser in situ keratomileusis

2006 ◽  
Vol 32 (11) ◽  
pp. 1877-1883 ◽  
Author(s):  
Dan Z. Reinstein ◽  
Richard C. Rothman ◽  
Darren G. Couch ◽  
Timothy J. Archer
Keyword(s):  
High Frequency ◽  
Laser In Situ Keratomileusis ◽  
Ultrasound Guided ◽  
Very High Frequency ◽  
Very High

Arc-scanning Very High-frequency Digital Ultrasound for 3D Pachymetric Mapping of the Corneal Epithelium and Stroma in Laser in situ Keratomileusis

2000 ◽  
Vol 16 (4) ◽  
pp. 414-430
Author(s):  
Dan Z Reinstein ◽  
Ronald H Silverman ◽  
Tatiana Raevsky ◽  
George J Simoni ◽  
Harriet O Lloyd ◽  
...  
Keyword(s):  
Corneal Epithelium ◽  
High Frequency ◽  
Laser In Situ Keratomileusis ◽  
Very High Frequency ◽  
Very High

Very High Frequency Ultrasound Analysis of a New Phakic Posterior Chamber Intraocular Lens In Situ

1998 ◽  
Vol 125 (5) ◽  
pp. 725-729 ◽  
Author(s):  
Daniel Y. Kim ◽  
Dan Z. Reinstein ◽  
Ronald H. Silverman ◽  
David J. Najafi ◽  
Sandra C. Belmont ◽  
...  
Keyword(s):  
Intraocular Lens ◽  
High Frequency ◽  
Posterior Chamber ◽  
High Frequency Ultrasound ◽  
Very High Frequency ◽  
Posterior Chamber Intraocular Lens ◽  
Very High ◽  
Frequency Ultrasound

scholarly journals Save Muscle Information–Unfiltered EEG Signal Helps Distinguish Sleep Stages

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2024
Author(s):  
Gi-Ren Liu ◽  
Caroline Lustenberger ◽  
Yu-Lun Lo ◽  
Wen-Te Liu ◽  
Yuan-Chung Sheu ◽  
...  
Keyword(s):  
High Frequency ◽  
Muscle Tone ◽  
Sleep Stage ◽  
Sampling Rate ◽  
Spectral Information ◽  
Sleep Stages ◽  
Eeg Signal ◽  
High Sampling ◽  
High Sampling Rate

Based on the well-established biopotential theory, we hypothesize that the high frequency spectral information, like that higher than 100Hz, of the EEG signal recorded in the off-the-shelf EEG sensor contains muscle tone information. We show that an existing automatic sleep stage annotation algorithm can be improved by taking this information into account. This result suggests that if possible, we should sample the EEG signal with a high sampling rate, and preserve as much spectral information as possible.

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