I created a garden planer for our community garden with the following functions: seed calendar – yearly calendar with marked times when seeds of a specific plant can be planted good / bad neighbors – a list with plants that either grow well together (e.g. protect each other from illnesses) or that grow bad together (e.g. require the same resources) plant bed planner – a list of plant beds and plants, plants for each plant bed are marked for good…
Recently I completed the IBM Data Science Professional certificate. The final project was a wrap up of the whole course spanning over data gathering (API/web scraping), data wrangling, visual data analysis, an interactive dashboard (Plotly/Dash), and application of machine learning to develop a predictive model (grid search). All work was conducted in Jupyter notebooks. Here I will share with you: – Final project capstone SpaceX presentation (PDF) – it is structured like a report with project description, methodology section, findings,…
I made a cheat sheet for various visualisations from the Seaborn library. I hope it will be of use for others 🙂 If you experience problems please comment to improve the sheet. Download here: Searborn visualisation cheat sheet
Errors messages are a tricky part of the HMI design. An error message means that the user cannot reach the goal of an interaction and it therewith carries a negative emotion (negative user experience). However, the adherence of simple principles can improve the design of an error message and consequently brighten the user’s mood (increase user experience). An error message should be simple, easy to understand, easy to locate, and, in the best case, instructive. Simplicity means that the message…
The screenshot shows an error message from a computer in the library. The error message says: “Could not perform this operation because the default mail client is not properly installed.”. There appears to be a of technical error. Errors are a an unfortunate part of the human-machine interaction. As they interfere with the intended task by their nature, error messages can degrade user experience, particularly if the message does not follow basic principles. The message should communicate be clear and…
Learning how to use chopsticks is not an easy task. The fingers need to be in the correct position and it requires fine motor skills to successfully aim at small pieces. After struggling to acquire that skill myself, I wondered how little kids learn to eat with chopsticks. It appears that one option is to follow a guide such as this wiki instruction page. Another option is to invest in special chopsticks for children, also called learning chopsticks. A colleague…
What is it? The carpal tunnel is a tunnel out of connective tissue between the bony forearm and hand. The tunnel is a passage for nerves such as for movement of the fingers and haptic feedback of the hand. While using the computer and interacting with a mouse the wrist is strongly bent. This causes a contraction of this nerve tunnel and over longer time the nerves passing through will be damaged. Consequential effects are pain during and after mouse…
Whenever a new interface or warning for the driver is implemented, it needs to be ensured that the driver can still keep attention on road. The new interface / warning (further on just called new design) will be tested in a driving simulator at some point. The driver will drive the vehicle and conduct a task with the new interface or react to the warning, in parallel they will also conduct a secondary task to challenge the driver. In extensive…
You come across it everyday but you hardly spent any thought about it: the telephone’s 10 button keypad. It appears natural in its 3×3 arrangement, the numbers ascending from left to right and from top to bottom. The same layout is used on e.g. smart phones, ATMs, cell phones, pin entry devices and card payment terminals. However, the number layout is different on a calculator or numeric part of the keyboard (3×3 as well, but ascending numbers from left to…
While I did research at university I worked mostly with quantitative data and did all analysis either in SPSS (a very small part) and R. R is a powerful tool yet comparable easy to learn (with basic knowledge about programming). But I found its limiting in the ability to create interfaces. One could, rightfully, argue its not its purpose. This limitation in mind brought my interest to python. Python offers many ways to create interfaces, such as via Django or…