@sepdek's

Recognising the value of light in life, humans throughout history devised ways of capturing the images created by light, while, at the same time, wondering and exploring the very nature of this magical element, sometimes using science, sometimes using logic and philosophy, and sometimes relying on feeling and superstition. What is certain is that light […]

A Brief History of Colour Theory tells the story of almost two and a half millennia, written by protagonists of a variety of characters. In the era of philosophy, colour science was founded upon logic, experience and philosophical worldviews. During the middle ages, the theory shifted towards experimental verification, although still strongly influenced by personal […]

In a recent post (Analysis of live COVID-19 data – a MATLAB/Octave approach) I described how it is possible to analyse live COVID-19 data from reliable online data sources and create intuitive graphical representations. Apparently, this task is also simple when using Python programming language. To this end, a Colab Python notebook was created to […]

Analysis of (time-series) data being collected in (near) realtime often provides insight for a process underway. As the current situation with COVID-19 is still critical lots of data are being collected, curated and streamed throughout the world, and researchers strive to get the most out of them to identify patterns and, maybe, make predictions. In […]

I have recently finished developing a simple eHealth project that includes a health sensor kit and an iOS 8 app published through the App Store (*currently my developer account is suspended due to the capital controls in Greece). The project is called ‘i-Health’ for all the known reasons. The application offers a live medical monitoring […]

Free will has long been an issue on my mind. Although I am not into psychology or neuroscience I approached it in a logical/abstract way. It became apparent to me that there is no such thing as ‘free will’. The manifestations of our thoughts, our actions, which we tend to base upon free will, seem […]

I am quoting the words of a professor in Greece. I have not yet had the opportunity to check the validity of the claims but I have to take a note of them! For those who do not (or choose to not) know what the Greek people and Greece is… We are a country that […]

The reflections that follow are attributed to a Professor from AUTH, Greece. Suppose you have lent 100 euros to someone with a salary of 100 euros and 500 euros to someone with a salary of 1000 euros. The first owes 100% of his/her salary while the second owes 50% of his/her salary. By what logic […]

Alexander Sack, 1927, When a debt is an “odious debt”: 1. Loans are without the consent of the citizens 2. Loans are wasted without benefit to the citizens 3. The lender know but do not mind Exactly, which of these is incorrect for Greece? Alexander Sack, 1927, Πότε ένα χρέος είναι «απεχθές χρέος»: 1. Τα […]

This is how kids can do electrical circuits just by playing with dough. Here it is… the squishy circuits project page, with recipes of conductive and insulating dough along with example circuits and project videos.

Just returned from my first TEDx Thessaloniki event (although a regular online visitor to TED). The event’s site is here. Have you ever wondered why not? then you are probably a TEDx-ster. This is what TEDx Thessaloniki was about. The event was held at the Olympion Cinema at the center of Thessaloniki (Aristotle Square) and […]