In Rust code, two ways to run concurrent tasks are spawning threads using the standard library, and using the tokio crate for async I/O. In this video I make a test program with 100 tasks that take different amounts of time and compare how threads...
A couple new cross-signing features to demonstrate, as a follow-up to https://scitech.video/videos/watch/1c8a0262-dee9-4927-b9e9-9856a7f4d8bf
A demonstration of cross-signing in Matrix, as of June 12, 2019. The client code is available at https://gitlab.com/uhoreg/matrix-device-trust. The spec proposal is at https://github.com/matrix-org/matrix-doc/pull/1756.
Two-legged gait developed by a model-based reinforcement learning controller after ~30 min of training.
Undulating gait pattern developed by a model-based reinforcement learning algorithm after 30-50 minutes of training.
Simple PWM system for controlling pressure, here used to 'break in' a silicone baloon. The input pressure is 1 bar. First I set the pressure to 1.8 bar to expand the baloon as much as possible, then I immediately decrease it to 0.5 bar, and ...
Using pyqtgraph to plot live data from position sensors, IMU and position tracking of a soft robot.
At the end of 2016, UTC had a leap second inserted at 23:59:60. This short video shows what my iOS and macOS clocks did during that transition, shown here at my local time (UTC+11). As you can see, the iOS clock ignored it completely and kept swee...
Make an outgoing AX.25 connection to a BBS, and handle incoming connections with a custom program. Features the tools axcall, ax25_call, axctl, ax25d, netstat and inetd.
Miles runs down the inner workings of the Ikawa sample roaster.
The insertion point pulses, waiting for input.
The roasting schedule feature was added in Typica 1.9 to make it easier for roasting companies to split the roasting work flow up among multiple stations. Previously, it was challenging to adopt a workflow other than having one person weigh the...
How I have Typica set up at a Diedrich IR-1 Profile Lab Roaster to record temperature, fuel setting, airflow setting, and communicate with a scale for measuring green and roasted weights. Since making this, I've also added [degree of roast measure...
Also known (unfortunately) as Rate of Rise, the rate of change of the temperature of a coffee during roasting can be used to more quickly notice when a batch is diverging from a roasting plan. This derived data series is most useful when calculate...
An overview of the annotation controls available in Typica. All of these are now in current release versions of Typica. You can also see an example of Typica communicating with simulated hardware on Linux using ModbusPal and tty0tty.
With Typica, it's easy to set up multiple coffee roasters such that measurements are presented in a way that's mutually calibrated. By presenting data such that development milestones appear to occur at the same temperatures, it's easier to match ...
A short demo showing coffee roasting data with Qt Quick 2. This is how I'm able to zoom in on specific points of interest, compare different roasts, and otherwise use roasting data to illustrate concepts in my videos. Some day I'd like to have the...
Typica 1.8 changed how Typica logs who recorded which activities. This enabled a faster and easier way to switch the currently logged in user.
While it's almost always better to use Typica with supported data acquisition hardware, it's possible to use Typica without that and with some machines, particularly older sample roaster designs, the quality of measurements available may mean it m...
The main data entry tasks for tracking green coffee inventory using Typica. Entering data accurately and consistently is key to getting usable reports based on that data.
Demonstration and reasoning behind the roast profile translation feature that was introduced in Typica 1.4.
When using data acquisition systems at a coffee roaster, understanding what's going on under the hood can be extremely helpful in getting the best possible measurement quality. In this video I walk through the basics of how temperature measurement...
How to install, configure and use the SSH reverse-proxy service inside Artica.
Learn how to start collaborating on Write.as with our newest feature, Teams. This will walk you through creating a team, starting a shared blog, and inviting collaborators.