1# Concept Collection
3Small, self-contained projects: interactive demos, teaching companions, and
4research code. Many run entirely in your browser with no install, built around
5[numbl](https://numbl.org) (MATLAB in the browser), scientific-data tooling, and
6mathematical visualization.
8Each entry links to its source repository and, where available, a live page.
10## Run-in-browser MATLAB (numbl)
12MATLAB-syntax projects that execute in the browser via [numbl](https://numbl.org).
13Pick a script, click Run, edit freely.
15- **[numbl-quantum-optics](https://github.com/concept-collection/numbl-quantum-optics)**
16 ([live](https://concept-collection.github.io/numbl-quantum-optics/)).
17 Companion to the article "Quantum optics in MATLAB"
18 ([arXiv:2309.14354](https://arxiv.org/abs/2309.14354)): quantum states,
19 operators, and dynamics as runnable scripts.
20- **[numbl-open-quantum-systems](https://github.com/concept-collection/numbl-open-quantum-systems)**
21 ([live](https://concept-collection.github.io/numbl-open-quantum-systems/)).
22 Companion to "Coding closed and open quantum systems in MATLAB"
23 ([arXiv:1911.04906](https://arxiv.org/abs/1911.04906)): Ising dynamics,
24 cavity-QED phase transitions, Lindblad and non-Markovian dynamics.
25- **[numbl-distmesh](https://github.com/concept-collection/numbl-distmesh)**
26 ([live](https://concept-collection.github.io/numbl-distmesh/)).
27 Interactive companion to Persson and Strang's
28 [DistMesh](https://github.com/popersson/DistMesh): every README example,
29 meshing 2-D regions and surfaces from signed distance functions.
30- **[numbl-surfacefun-intro](https://github.com/concept-collection/numbl-surfacefun-intro)**
31 ([live](https://concept-collection.github.io/numbl-surfacefun-intro/)).
32 An introduction to [surfacefun](https://github.com/danfortunato/surfacefun):
33 computing with functions on surfaces and solving PDEs on them, to high order.
34- **[surfacefun-interactive](https://github.com/concept-collection/surfacefun-interactive)**
35 ([live](https://concept-collection.github.io/surfacefun-interactive/)).
36 Interactive surfacefun demos with live sliders (React and three.js driving a
37 numbl script): refine a cubed-sphere mesh, scale a tangent vector field.
38- **[numbl-image-filter](https://github.com/concept-collection/numbl-image-filter)**
39 ([live](https://concept-collection.github.io/numbl-image-filter/)).
40 A web app that filters an image with a numbl/MATLAB script entirely in the
41 browser; upload your own image and write the filter.
42- **[numbl-project-example](https://github.com/concept-collection/numbl-project-example)**
43 ([live](https://concept-collection.github.io/numbl-project-example/)).
44 A minimal numbl project deployed to GitHub Pages; a starter template.
45- **[numbl-embed-example](https://github.com/concept-collection/numbl-embed-example)**
46 ([live](https://concept-collection.github.io/numbl-embed-example/)).
47 How to embed editable, runnable numbl scripts inside Markdown rendered on
48 GitHub Pages.
50## Data compression
52- **[benchcompress](https://github.com/concept-collection/benchcompress)**
53 ([results](https://concept-collection.github.io/benchcompress/),
54 [paper (WIP)](https://concept-collection.github.io/benchcompress/paper)).
55 A benchmarking framework for compression algorithms on scientific data
56 arrays: compression ratio and encode/decode throughput, run automatically.
57- **[ephys_compression_tests](https://github.com/concept-collection/ephys_compression_tests)**
58 ([results](https://concept-collection.github.io/ephys_compression_tests/)).
59 Compression benchmarks focused on electrophysiology recordings.
60- **[ans-visualizer](https://github.com/concept-collection/ans-visualizer)**
61 ([live](https://concept-collection.github.io/ans-visualizer/)).
62 A visualizer for the Asymmetric Numeral Systems (ANS) entropy-coding
63 algorithm ([Duda et al., 2015](https://ieeexplore.ieee.org/abstract/document/7170048)).
65## Neurophysiology data and remote access
67- **[remote-hdf5-lazy-read](https://github.com/concept-collection/remote-hdf5-lazy-read)**
68 ([live](https://concept-collection.github.io/remote-hdf5-lazy-read/)).
69 How [neurosift](https://neurosift.app/) browses huge remote
70 [NWB](https://www.nwb.org/)/HDF5 files in the browser using HTTP range
71 requests, with no full download and no backend.
72- **[dandiset_000986](https://github.com/concept-collection/dandiset_000986)**
73 ([visualizations](https://concept-collection.github.io/dandiset_000986/)).
74 Reproducible figures and visualizations for
75 [DANDI Dandiset 000986](https://dandiarchive.org/dandiset/000986)
76 (mouse auditory cortex recordings).
78## Mathematical visualizers
80- **[finite-field-visualizer](https://github.com/concept-collection/finite-field-visualizer)**
81 ([live](https://concept-collection.github.io/finite-field-visualizer/)).
82 Color-coded multiplication tables over finite (prime) fields; step through
83 primes to see the structure change.
84- **[gcd-visualizer](https://github.com/concept-collection/gcd-visualizer)**
85 ([live](https://concept-collection.github.io/gcd-visualizer/)).
86 A color-coded GCD table: the greatest common divisor of every pair (i, j)
87 shown as a heatmap.