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2 changes: 1 addition & 1 deletion ACCESSIBILITY.md
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Expand Up @@ -11,7 +11,7 @@ default.

> **Scope:** every active SceneryStack TypeScript simulation in
> [`structure/repos.json`](structure/repos.json) (`isSimulation` + `framework: SceneryStack`)
> plus `SceneryStackTemplate`. As of 2026-08-05 that is 31 sims including ACPhasor,
> plus `SceneryStackTemplate`. As of 2026-08-12 that is 37 sims including ACPhasor,
> BasicCoordinatesAndSeasons, CarnotHeatEngine, HabitableZones, LightPropagation, MotionsOfTheSun,
> Oscilloscope, Precession, SpecialRelativity, SternGerlach, and Zenith. The hardware
> web UI `tscd48` and the Python apps are out of scope and keep their own a11y docs.
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2 changes: 1 addition & 1 deletion CONVENTIONS.md
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Expand Up @@ -12,7 +12,7 @@ conformant by default.

> **Scope:** every active SceneryStack TypeScript simulation in
> [`structure/repos.json`](structure/repos.json) (`isSimulation` + `framework: SceneryStack`)
> plus `SceneryStackTemplate`. As of 2026-08-05 that is 31 sims including ACPhasor,
> plus `SceneryStackTemplate`. As of 2026-08-12 that is 37 sims including ACPhasor,
> BasicCoordinatesAndSeasons, CarnotHeatEngine, HabitableZones, LightPropagation, MotionsOfTheSun,
> Oscilloscope, Precession, SpecialRelativity, SternGerlach, and Zenith. The hardware
> web UI `tscd48` and the Python apps (`pyro`, `pycd48`) are out of scope. Orchestration (`Baton`)
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15 changes: 13 additions & 2 deletions docs/index.html
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Expand Up @@ -283,7 +283,7 @@ <h1>OpenPhysics</h1>
<section>
<div class="section-head">
<h2>Core Simulations</h2>
<span class="count">21</span>
<span class="count">23</span>
</div>
<div class="grid">
<a class="card" href="https://openphysics.github.io/ACPhasor/" style="--hue: 33;">
Expand Down Expand Up @@ -473,6 +473,17 @@ <h3>Special Relativity</h3>
<div class="tags"><span class="tag">special relativity</span><span class="tag">spacetime</span><span class="tag">time dilation</span></div>
</div>
</a>
<a class="card" href="https://openphysics.github.io/StandingWaves/" style="--hue: 262;">
<div class="thumb"><img src="assets/StandingWaves.webp" alt="Standing Waves simulation screenshot" loading="lazy" decoding="async" width="1154" height="753"><span class="badge">SW</span></div>
<div class="card-body">
<div class="card-head">
<h3>Standing Waves</h3>
<span class="card-arrow" aria-hidden="true">&rarr;</span>
</div>
<p>Longitudinal standing waves in a pipe: displacement, velocity and pressure phase relationships, open vs. closed end reflection, and the harmonic series of open and stopped pipes.</p>
<div class="tags"><span class="tag">standing waves</span><span class="tag">acoustics</span><span class="tag">pipes</span></div>
</div>
</a>
<a class="card" href="https://openphysics.github.io/SternGerlach/" style="--hue: 138;">
<div class="thumb"><img src="assets/SternGerlach.webp" alt="Stern–Gerlach simulation screenshot" loading="lazy" decoding="async" width="1154" height="753"><span class="badge">SG</span></div>
<div class="card-body">
Expand Down Expand Up @@ -705,7 +716,7 @@ <h3>Variable Star Photometry</h3>
</main>

<footer>
<p>35 live simulations &middot; Built with <a href="https://scenerystack.org/">SceneryStack</a> &middot; GNU Affero GPL v3 &middot;
<p>37 live simulations &middot; Built with <a href="https://scenerystack.org/">SceneryStack</a> &middot; GNU Affero GPL v3 &middot;
<a href="https://github.com/OpenPhysics/Baton">OpenPhysics/Baton</a></p>
</footer>
</div>
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27 changes: 27 additions & 0 deletions structure/repos.json
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Expand Up @@ -969,6 +969,33 @@
],
"status": "active"
},
{
"name": "StandingWaves",
"displayName": "Standing Waves",
"type": "simulation",
"isSimulation": true,
"lineage": "original",
"upstream": null,
"language": [
"TypeScript"
],
"framework": "SceneryStack",
"description": "Longitudinal standing waves in a pipe: displacement, velocity and pressure phase relationships, open vs. closed end reflection, and the harmonic series of open and stopped pipes.",
"deployedUrl": "https://openphysics.github.io/StandingWaves",
"physicsTopics": [
"standing waves",
"acoustics",
"pipes",
"harmonics"
],
"screens": [
"Reflection",
"Phase",
"Standing Waves",
"Instruments"
],
"status": "active"
},
{
"name": "SternGerlach",
"displayName": "Stern\u2013Gerlach",
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