Category: Projects

A few lines of maths can draw a coastline, a fern or a galaxy. fractals.jelia.nyc is the third site in our family of deep dives, after networks and waves, and the most colourful.

It runs to eighteen chapters in five parts, plus a history and a 107-term glossary: self-similarity and fractal dimension, the classic “monsters”, the chaos game and L-systems, fractal flames, the Mandelbrot and Julia sets, and how computers actually colour them.

A gallery you can step into

Sixty-three original renders, from the Mandelbrot set’s seahorse valley to iterated-function-system ferns, are woven through the chapters and collected in a gallery. Each image links straight into an explorer so you can zoom in yourself.

Fractals sit at the heart of JellyDazzle, our music-visualiser app for Mac, iPhone and iPad. The last part of the site walks through real problems we solved there, including the smooth colour crossfade that fixed a flash between scenes.

Get lost in it: fractals.jelia.nyc

Most networking guides start with acronyms. networks.jelia.nyc starts with what you can see: a packet leaving your laptop, and every hop it takes until it comes back.

It is a visual, hands-on guide in thirteen chapters, built so a curious owner and a seasoned engineer can both get something from it. Every chapter has a narrated walkthrough and an instrument you can poke at, and break, safely.

What it covers

• What a network is, then Ethernet, MAC addresses and switches
• IP addresses and subnets, DHCP and DNS
• TCP, UDP and ports, and your own home network
• NAT, double NAT and CGNAT, and how NAT traversal (STUN, hole punching, relays) gets around them
• Routing tables, longest-prefix match, OSPF and BGP
• VPNs, tunnels and overlays, and a troubleshooting toolkit to close

It is the same knowledge we use every day running mail, sign-on and video for our clients. When something is slow or unreachable, the answer is almost always somewhere in these chapters.

Read it: networks.jelia.nyc

Your Wi-Fi, your car keys, the radio and the light in the room are the same thing at different sizes. waves.jelia.nyc is our deep dive into electromagnetism, written for people with no physics background.

It began with a single page explaining what 2.4 GHz actually means. That page is still there, untouched, and the rest of the site grew around it: a hub, thirteen chapters and a glossary, each with narrated walkthroughs and instruments you can play with.

Built to be read by everyone

• Large, highly legible type throughout (Atkinson Hyperlegible).
• A colour-blind-friendly switch: palettes chosen by simulating colour-vision deficiency and checking that colours stay distinct in hue, not just in contrast.
• Light and dark themes, with the same chapter list driving every page.

Accessibility is not a feature we add at the end. It is how we build everything, from a teaching site to a client’s sign-in page.

Explore it: waves.jelia.nyc