pulse
Enable an agent to recognise a pulse as a bounded temporal excursion, assess how reliably it has been identified and measured, and decide whether to detect, compare, isolate or modify it.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise a pulse as a bounded temporal excursion, assess how reliably it has been identified and measured, and decide whether to detect, compare, isolate or modify it.
In the signal and physical-process sense assumed here, a pulse is a temporally localized excursion of a quantity from a baseline, characterized by its amplitude, duration and waveform.
It can be Detect candidate pulses using a declared baseline, threshold and boundary rule.; Segment a waveform into pulse candidates while retaining ambiguous merges and splits.; Measure and compare pulse shapes using compatible units and conventions.; Associate pulses with a sequence and estimate recurrence where enough observations exist.; Specify a target pulse waveform and check whether a linked generator can produce it.; Evaluate how filtering, resampling or shaping changes pulse identity and measured properties..
Distinguishing features
A candidate has an identifiable onset and termination under an explicit boundary rule; an indefinitely maintained step does not qualify under this scope.
A candidate departs from a specified baseline in a named quantity; a timestamped event alone does not establish a pulse waveform.
An individual pulse can be isolated by an explicit segmentation rule; a continuous oscillation is not automatically a sequence of pulses.
A pulse need not repeat; recurrence belongs to its relationship with other pulses.
Calling a fluctuation a pulse requires a stated criterion for distinguishing it from background variation, including an unresolved classification when the evidence is insufficient.
Scope
+ The quantity that exhibits the pulse and its reference baseline
+ Criteria that distinguish a pulse from noise, a sustained change or an oscillation
+ Pulse onset, termination, duration, amplitude and waveform
+ Individual pulses and their membership in pulse sequences
+ Observation limits and uncertainty in pulse identification
+ Conditions for detecting, comparing, generating or modifying a pulse
- Complete models of the physical carriers, devices or media that produce pulses
- Cardiovascular physiology and clinical interpretation of an arterial pulse
- Musical pulse as an organising beat
- Edible seeds called pulses
- Continuous oscillation and sustained state changes except where needed to distinguish them from pulses
- Messages or commands encoded by pulses beyond the pulse-to-meaning relationship
Characteristics
- Pulsed quantity
- Named observable or modelled quantity with its applicable unit Identifies what changes and prevents comparisons between unrelated amplitudes.
- Baseline reference
- Reference value or time-varying baseline estimate, with estimation interval and method Pulse amplitude and boundaries depend on the reference against which the excursion is recognised.
- Temporal boundaries
- Onset and termination in a declared time coordinate, with boundary rule and uncertainty Makes the pulse identifiable as a bounded occurrence.
- Pulse width
- Time units; specify threshold crossings, full width at half maximum or another declared convention Widths obtained using different conventions may describe different portions of the same waveform.
- Amplitude and polarity
- Signed deviation or positive and negative extrema in the pulsed quantity's unit, relative to baseline Distinguishes upward, downward and multiphasic excursions without assuming that every pulse has one positive peak.
- Waveform form
- Declared shape description, including number of phases, asymmetry and any ringing or secondary peaks Supports comparison and determines whether apparent subevents belong to one pulse.
- Sequence membership
- Isolated pulse or linked sequence with pulse index and adjacent onset intervals Separates properties of one pulse from repetition rate and regularity.
- Observation status
- Resolved, ambiguous, partially observed, clipped or unresolved overlap; allow multiple applicable states Limits which measurements and actions the evidence supports.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.pulse-food
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 15 findings · 23 questions.
Pulse identity Establishes which sense of pulse is intended and what makes an excursion count as one instance.
The registry provides no definition, and the name spans meanings that cannot safely share one recognition rule.
Sense and observable
Anchors the provisional temporal-pattern interpretation to a specific quantity.
Intended pulse sense
Record the evidence for interpreting pulse as a bounded excursion and identify what quantity exhibits it.
- Does the originating registry record mean a temporal excursion, an arterial pulse, a musical beat or another sense? definition
- Which registry source or domain reference supports the selected sense and pulsed quantity? provenance
Excursion membership
Defines the baseline and finite-duration criterion used to recognise one pulse.
Pulse versus other change
Make pulse membership conditional on an explicit rule for departure, termination and separation from background variation.
- What baseline and departure criterion distinguish a candidate pulse from ordinary background variation? definition
- What termination rule distinguishes the pulse from a step, drift or an excursion cut off by the observation window? boundary
Pulse waveform Describes the temporal extent and shape of an individual pulse under stated measurement conventions.
Amplitude and duration alone can hide differences in polarity, phases, tails and boundary conventions that matter to pulse use.
Onset, width and tail
Identifies which parts of the waveform define its timing and duration.
Timing convention
Record the rule used for onset, termination and width, including how gradual edges or long tails are handled.
- Which threshold or waveform feature defines onset and termination, and how are repeated crossings treated? measurement
- Is reported duration a threshold width, full width at half maximum or another measure, and what uncertainty accompanies it? measurement
Amplitude and phases
Captures signed magnitude and internal waveform structure.
Pulse shape description
Describe extrema and phases without assuming a rectangular, positive or single-peaked pulse.
- What are the pulse's signed extrema relative to baseline, and in which quantity and unit are they measured? measurement
- Are secondary peaks, opposite-polarity phases and ringing part of this pulse or separate pulses under the selected convention? boundary
Pulse observation and separation Assesses whether the available record resolves a pulse and supports separating it from nearby excursions.
Sampling, clipping and overlap can change the apparent number, width and amplitude of pulses.
Recording resolution
Relates observed pulse features to the acquisition and processing that produced the record.
Observed versus inferred waveform
Distinguish features directly supported by observations from features inferred through processing or reconstruction.
- What sampling interval, sensor response and processing history produced the recorded pulse? provenance
- Which pulse features remain measurable given noise, clipping, missing samples and the available temporal resolution? measurement
Overlap and recurrence
Separates decisions about individual pulse boundaries from properties of a pulse sequence.
Individual pulse assignment
Record how overlapping or repeated excursions are assigned to individual pulses and linked into sequences.
- What evidence supports treating adjacent peaks as distinct pulses rather than phases or ringing of one pulse? boundary
- If the pulse belongs to a sequence, what onset intervals and missing-detection uncertainty support a repetition-rate or regularity estimate? measurement
Pulse use and transformation Connects pulse descriptions to detection decisions, generation targets and waveform transformations.
An agent needs to know which pulse properties an operation must preserve and which decisions require evidence from a neighbouring model.
Detection and comparison
Defines usable criteria for accepting a pulse candidate or comparing pulses.
Pulse decision criteria
Tie detection and comparison to explicit tolerances and a stated purpose.
- What amplitude, width, shape and separation criteria permit accepting a candidate as a pulse for this task? action
- Which baseline, timing and normalisation conventions must be aligned before two pulses can be compared? measurement
Generation and shaping
Specifies intended waveform changes and links execution constraints to the relevant carrier or device model.
Pulse transformation contract
Record the target pulse, allowed deviations and properties that generation or transformation must preserve.
- When generating, filtering, resampling or shaping this pulse, which timing, amplitude and phase properties must remain within what tolerances? action
- Which linked device or medium model determines whether the requested pulse can be produced and what effects it may have? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- The registry provides no sense; this answer assumes the general signal or physical-process meaning. Physiological pulse, musical pulse and edible pulses require different models.
- The listed kinds overlap: waveform shape, polarity and repetition are separate classification dimensions.
- Pulse width is convention-dependent; full width at half maximum and threshold-crossing definitions need not give identical results.
- Which of these check these first hold for the sense of pulse this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Rectangular pulse
- Gaussian pulse
- Unipolar pulse
- Bipolar pulse
- Single pulse
- Pulse train
- Which of these kinds and varieties hold for the sense of pulse this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- IEEE Std 181, issued by IEEE, standardizes terminology and measurement definitions for transitions, pulses and related waveforms.
- Which of these standards and regulation hold for the sense of pulse this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Representing information through pulse timing, amplitude or width.
- Timing and synchronization in electronic systems.
- Estimating distance through pulse travel time in radar, lidar and sonar.
- Controlling average delivered power through pulse-width modulation.
- Probing system responses with brief excitation signals.
- Which of these real-world use hold for the sense of pulse this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Pulse duration or width - Application-dependent; the reference levels used to define width must be stated. - s
- Peak amplitude - Application-dependent and measured relative to a specified baseline. - Unit of the pulsed quantity, such as V, A, Pa or W
- Rise time and fall time - Application-dependent; measurement thresholds must be stated. - s
- Pulse repetition frequency - Applies to repeated pulses; application-dependent. - Hz
- Duty cycle - 0-100% for a periodic rectangular pulse train, with the endpoints representing limiting cases. - %
- Which of these typical measurements hold for the sense of pulse this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Limited measurement bandwidth can distort the apparent amplitude, width and transition times.
- Ringing, overshoot and reflections can produce unintended peaks or false detections.
- Timing jitter can impair synchronization and travel-time measurements.
- Overlapping pulses can become difficult to distinguish individually.
- High peak power can damage equipment or create exposure hazards even when average power is modest.
- Which of these failure modes and hazards hold for the sense of pulse this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- impulse - An ideal mathematical impulse has zero duration and finite integral; a physical pulse has nonzero duration.
- step - A step establishes a new sustained level; a pulse is localized in time.
- wave - A wave describes a disturbance with spatial and temporal behavior; a pulse can be a localized wave packet or simply a time-dependent signal.
- transient - A transient is any temporary response or departure from steady behavior; it need not form a distinct pulse.
- arterial pulse - An arterial pulse is a physiological pressure disturbance associated with cardiac activity, a specific physical phenomenon rather than the general signal concept.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of pulse this model covers, and on what evidence? provenance
What the second pass must settle
- Which sense of pulse does vr.tr.pulse denote, and what does its placement in XCT / XCT.STA establish about that sense?
- Does an existing Vercy world model already own this concept, requiring a registry link instead of a separate publication?
- Which domain references should govern pulse boundaries, especially for long tails, baseline shifts and multiphasic excursions?
- Should pulse trains and recurrence statistics belong to this model or to a neighbouring sequence or signal model?
- Which domain-specific quantities, such as time-integrated amplitude, are necessary for intended tasks, and when do they have a justified physical interpretation?