From aefee00614a11f85fdced1a1ba97f568c5d6e838 Mon Sep 17 00:00:00 2001 From: Craig Oates Date: Mon, 24 May 2021 19:19:31 +0100 Subject: [PATCH] update photosensitive epiliespy assessment links. --- health-and-safety/photosensitive_epilepsy.md | 34 +++++++++++--------- 1 file changed, 18 insertions(+), 16 deletions(-) diff --git a/health-and-safety/photosensitive_epilepsy.md b/health-and-safety/photosensitive_epilepsy.md index 07dcc2d..0c93043 100644 --- a/health-and-safety/photosensitive_epilepsy.md +++ b/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