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update photosensitive epiliespy assessment links.

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Craig Oates 3 years ago
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aefee00614
  1. 34
      health-and-safety/photosensitive_epilepsy.md

34
health-and-safety/photosensitive_epilepsy.md

@ -21,7 +21,7 @@ The two main reasons why the artworks don't produce a high enough
flicker/flash rate are as follows:
1. The devices controlling the lights in the gallery cannot receive
enough new readings-per-second to reach the Hertz required to cause
enough new readings-per-second to reach the hertz required to cause
a seizure (according the reference sources below); And,
2. The welders in the factory do not alter the light levels (in their
welding booths) at a high enough rate to trigger a seizure.
@ -31,8 +31,8 @@ reason why is because I can refer you to the link below to address the
first point:
-
[Relay](https://git.abbether.net/return-to-ritherdon/relay/src/branch/unstable/relay.py#L51)(the
software controlling the lights in the gallery)
[Relay](https://git.abbether.net/return-to-ritherdon/relay/src/branch/unstable/relay.py#L51)
(the software controlling the lights in the gallery)
The highlighted line (on the linked page) indicates the gallery lights
must wait 0.3 seconds until it receives the latest light reading
@ -44,16 +44,18 @@ To expand on the second point, I have analysed and reviewed a
days-worth of **live test** data, collected on the
**23/04/2021**. *Personal Flash in Real Time (Ross)* (the light meter
part of the artwork) took the light readings from **06:57 to 16:00**
(approx. 9 hours). Also, the test was conducted in the intended
(approx. 9 hours). Also, the test was conducted under the intended
environment and under real-world conditions.
The overall assessment of the data is the light meter took readings at
a rate of four readings-per-second for approximately two
(non-consecutive) hours. Within that time, the light meter *produced
readings* which could trigger a flash rate of two hertz, at most, if
the gallery light wasn't already limited to three
readings-per-second. And, it reached this 'peak' for a total of three
non-consecutive seconds throughout the nine hours.
(non-consecutive) hours. Within that time, the light meter produced
*readings* which generated a flash rate of two hertz, at most. And, it
reached this 'peak' for a total of three non-consecutive seconds
throughout the nine hours. With the light meter demonstrating it has
*the potential* to generate enough new readings-per-second, the
gallery lights have a hard limit of three readings-per-second encoded
into their systems (via their software).
## Information About Photosensitive Epilepsy
@ -66,7 +68,7 @@ trigger seizures but this varies from person to person. While some
people are sensitive at frequencies up to 60 hertz, sensitivity under
3 hertz is not common.
More information can be found at:
More information available at:
- [Epilepsy Society](https://epilepsysociety.org.uk/) (home page)
- [Epilepsy
@ -180,7 +182,7 @@ are available if needed.
If you would like to see the data in situ, click on the following:
- [test-data-lite.csv](https://git.abbether.net/return-to-ritherdon/rtr-docs/src/branch/unstable/health-and-safety/data/test-data-lite.csv)
- [test-data-lite.csv](data/test-data-lite.csv)
The data consists of three columns:
@ -252,7 +254,7 @@ document.
## Breakdown of Data Analysis
Within the [data](/data) directory, the [results](/data/results)
Within the [data](data) directory, the [results](data/results)
directory contains four files. These files are the result of the data
analysis.
@ -274,7 +276,7 @@ assessment. And, each file will have its own subsection below.
### readings-per-sec.csv
- [readings-per-sec.csv](/data/results/readings-per-sec.csv)
- [readings-per-sec.csv](data/results/readings-per-sec.csv)
Overall, the test data recorded **84,294** readings over the course of
about nine hours. With that said, the readings-per-second rates
@ -360,7 +362,7 @@ recordings and not all of it.
### readings_above_threshold.csv
- [readings_above_threshold.csv](/data/results/readings_above_threshold.csv)
- [readings_above_threshold.csv](data/results/readings_above_threshold.csv)
To review the time periods were the light meter was recording above
three hertz, I needed to know there timestamps. This file is a list of
@ -372,7 +374,7 @@ file is an artefact of the filtering process and needed to generate
### flicker_list.csv
- [flicker_list.csv](/data/results/flicker_list.csv)
- [flicker_list.csv](data/results/flicker_list.csv)
This file lists all the moments the light meter recorded at four
readings-per-second and the light levels at those times. I should note
@ -422,7 +424,7 @@ system flash rate was one hertz for that second.
### filtered_flicker_entries.csv
- [flicker_entries.csv](/data/results/flicker_entries.csv)
- [flicker_entries.csv](data/results/flicker_entries.csv)
The data in this file filters the data in `flicker_list.csv` down to
eight time periods. These are the times the light recorded at four