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Record W1988238872 · doi:10.1063/1.4897220

Life signal detection using an on-chip split-ring based solid state microwave sensor

2014· article· en· W1988238872 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.
fundA Canadian funder is recorded on the work.

Bibliographic record

VenueApplied Physics Letters · 2014
Typearticle
Languageen
FieldEngineering
TopicNon-Invasive Vital Sign Monitoring
Canadian institutionsUniversity of Manitoba
FundersChina Scholarship CouncilCanadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of CanadaNational Natural Science Foundation of China
KeywordsHeartbeatMicrowaveTransducerAnalyserSIGNAL (programming language)Sensitivity (control systems)MicrocontrollerChipAmplifierElectronic engineeringSignal processingComputer scienceAcousticsMaterials scienceOptoelectronicsEngineeringPhysicsCMOSTelecommunicationsEmbedded systemOptics

Abstract

fetched live from OpenAlex

A technique for measuring the amplitude and frequency of breathing and heartbeat has been developed using an on-chip solid state sensor integrating a semiconductor microwave sensor and a split ring operating at a resonance frequency of 4.2 GHz. This technique allows the lock-in amplifier to make real-time measurements, analogous to measurements taken by a vector network analyser through an antenna, but with the advantage of being portable and having a user friendly DC output. The effectiveness of this approach is shown by performing several experiments to determine the breathing and heartbeat frequency with and without the presence of an obstacle between the test subject and the microwave sensor and transducer. The experimental results demonstrate the high sensitivity and large dynamic range over which the proposed system can be used for practical applications.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.374
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.016
GPT teacher head0.212
Teacher spread0.196 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it