Robust amplitude measurement for RF BIST applications

2015 ◽  
Author(s):  
Jae Woong Jeong ◽  
Jennifer Kitchen ◽  
Sule Ozev
Keyword(s):  
Amplitude Measurement

Capturing, Preserving, and Digitizing Legacy Seismic Data from the Montserrat Volcano Observatory Analog Seismic Network, July 1995–December 2004

2020 ◽  
Vol 91 (4) ◽  
pp. 2127-2140 ◽  
Author(s):  
Glenn Thompson ◽  
John A. Power ◽  
Jochen Braunmiller ◽  
Andrew B. Lockhart ◽  
Lloyd Lynch ◽  
...  
Keyword(s):  
Real Time ◽  
Seismic Data ◽  
Original Data ◽  
South Florida ◽  
Seismic Network ◽  
Quality Data ◽  
Spectral Amplitude ◽  
Assistance Program ◽  
Waveform Data ◽  
Amplitude Measurement

Abstract An eruption of the Soufrière Hills Volcano (SHV) on the eastern Caribbean island of Montserrat began on 18 July 1995 and continued until February 2010. Within nine days of the eruption onset, an existing four-station analog seismic network (ASN) was expanded to 10 sites. Telemetered data from this network were recorded, processed, and archived locally using a system developed by scientists from the U.S. Geological Survey (USGS) Volcano Disaster Assistance Program (VDAP). In October 1996, a digital seismic network (DSN) was deployed with the ability to capture larger amplitude signals across a broader frequency range. These two networks operated in parallel until December 2004, with separate telemetry and acquisition systems (analysis systems were merged in March 2001). Although the DSN provided better quality data for research, the ASN featured superior real-time monitoring tools and captured valuable data including the only seismic data from the first 15 months of the eruption. These successes of the ASN have been rather overlooked. This article documents the evolution of the ASN, the VDAP system, the original data captured, and the recovery and conversion of more than 230,000 seismic events from legacy SUDS, Hypo71, and Seislog formats into Seisan database with waveform data in miniSEED format. No digital catalog existed for these events, but students at the University of South Florida have classified two-thirds of the 40,000 events that were captured between July 1995 and October 1996. Locations and magnitudes were recovered for ∼10,000 of these events. Real-time seismic amplitude measurement, seismic spectral amplitude measurement, and tiltmeter data were also captured. The result is that the ASN seismic dataset is now more discoverable, accessible, and reusable, in accordance with FAIR data principles. These efforts could catalyze new research on the 1995–2010 SHV eruption. Furthermore, many observatories have data in these same legacy data formats and might benefit from procedures and codes documented here.

scholarly journals Electrophysiological correlates of confidence differ across correct and erroneous perceptual decisions

2021 ◽  
Author(s):  
Daniel C Feuerriegel ◽  
Mackenzie Murphy ◽  
Alexandra Konski ◽  
Jie Sun ◽  
Vinay Mepani ◽  
...  
Keyword(s):  
Neural Correlates ◽  
Event Related Potential ◽  
Decision Task ◽  
Methodological Issues ◽  
Decision Confidence ◽  
Amplitude Measurement ◽  
Error Positivity ◽  
Frontal Activity ◽  
Decision Errors ◽  
Confidence Ratings

Every decision we make is accompanied by an estimate of the likelihood that our decision is accurate or appropriate. This likelihood estimate is termed our degree of decision confidence. Recent work has uncovered event-related potential (ERP) correlates of confidence both during decision formation and after a decision has been made. However, the interpretation of these findings is complicated by methodological issues related to ERP amplitude measurement that are prevalent across existing studies. To more accurately characterise the neural correlates of confidence, we presented participants with a difficult perceptual decision task that elicited a broad range of confidence ratings. We identified a frontal ERP component within an onset prior to the behavioural response, which exhibited more positive-going amplitudes in trials with higher confidence ratings. This frontal effect also biased measures of the centro-parietal positivity (CPP) component at parietal electrodes via volume conduction. Amplitudes of the error positivity (Pe) component that followed each decision were negatively associated with confidence for trials with decision errors, but not for trials with correct decisions. We provide evidence for both pre- and post- decisional neural correlates of decision confidence that are observed in trials with correct and erroneous decisions, respectively. Our findings suggest that certainty in having made a correct response is associated with frontal activity during decision formation, whereas certainty in having committed an error is instead associated with the post-decisional Pe component. We additionally show that some previously reported associations between decision confidence and CPP/Pe component amplitudes are (at least partly) a consequence of ERP amplitude measurement-related confounds.

A system for amplitude measurement of single short pulses

1975 ◽  
Vol 18 (3) ◽  
pp. 434-436
Author(s):  
V. V. Polyudov ◽  
V. I. Telenkov
Keyword(s):  
Short Pulses ◽  
Amplitude Measurement

A Four Point Based HRG Resonator Amplitude Measurement Method and the Error Analysis

2015 ◽  
Vol 22 (9) ◽  
pp. 83-86 ◽  
Author(s):  
李 灿 LI Can ◽  
汪立新 WANG Li xin ◽  
黄松涛 HUANG Song tao ◽  
田 颖 TIAN Ying ◽  
陈 伟 CHEN Wei
Keyword(s):  
Error Analysis ◽  
Measurement Method ◽  
Amplitude Measurement
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