Case end¶

The end of the recording in the clinical table.

Stub

Imported from the time-source table; the full page is still to be written.


Name in the dataset	`caseend`
Type	event
Stored in	clinical_data.csv
Device	Clinical records
Stamped by	Hospital records clock
Unit	sec

Description¶

Device clock, whole seconds.

Measurement space¶

A vertical slice through the measurement space: how the true value is spread around any one recorded value. Its shape is uniform.

Time side (as recorded): the true time lies between -1.5 s and -0.01 s from the stamp: the delay range plus the interval one value describes.

Time¶

From UTC to the stored time stamp¶

Derived from this signal's timing table; a written chain is still to come.

The clock path first (UTC to the clock that stamps or spaces the samples), then the signal's own path to its stored time. Each bar: the time shift or error the step introduces (pale) and what is left after the atlas's correction (solid), on a log scale; dashed when estimated or assumed.

UTC

The reference every chain starts from.

Recorder PC clock

sync assumed 3 ms – 900 ms · clock link, parameter

Windows time synchronisation to the hospital's time server every 8–24 h (assumed), drifting a few ppm in between. Not observable in the release: dates are shifted to 2100. No step of 0.5 s or more was found.

Hospital records clock

transport measured 10 ms – 500 ms

Delay from the end of the interval a value describes to its stamp.

Stored time stamp

window measured 1 s

The width of the interval one value or sample stands for.

Timing¶

Against the working reference. Delay: from the end of the interval a value describes to its stamp. Interval: how wide that interval is.

Form	Delay	Interval	Clock domain	Status	Evidence
as recorded (default)	10 ms – 500 ms	1 s	Clinical and lab records	measured	recording end rounded to 1 s (98.7% within 1 s)

Combine it with other signals in the synchronisation planner.

Value¶


Model kind	uniform: single resolution; uniform over the rounding interval
Resolution	1 sec, floor
Native step	1 sec
Anchor	floor (convention)

In this release¶

How wide the true-value distribution is, record by record, over 6,388 of 6,388 records (all clinical rows) that have one. Computed with the pinned model, aggregates only.

	Median	p10 to p90
Standard deviation	0.289 sec	0.289 to 0.289 sec
95% interval width	0.95 sec	0.95 to 0.95 sec
Mean minus recorded	0.5 sec	0.5 to 0.5 sec

Anchor¶

Clock truncation to the whole second; at most 1 s, negligible. See what an anchor is and every variable's anchor.

Time and value together¶

Coupled. The value is itself a time: its value side and its time side are the same uncertainty.

Observations¶

Observation	Status	Summary
The EVENT track repeats the clinical table	established	In 411 random cases the recorder EVENT track's four entries equal the clinical table's case start, operation start, operation end and case end exactly: the release generated them from the table.

Figures¶

Histogram of the recorded values of caseend. — Recorded values in the release: 6,388 records, median 9924 sec; 64 outside the 0.5–99.5th percentiles are not shown.

Tags: stub