Publish at February 27 2023Updated February 27 2023
Is blue light bad for us?
An engineer's opinion
For the past few years, we have been hearing about the effects of blue light, this type of lighting is generated by LEDs and also by our smart devices. A handful of scientists have called for protection from this lighting and the optometry community has even thought about special glasses. Yet, is blue light really bad for us?
A physicist and researcher at the French Society for Radiation Protection sought to answer this question in a podcast called "Digital World." While it's true that the glow can have an effect on circadian rhythm and sleepiness, photochemical risks are virtually nonexistent. In fact, it would require a much longer exposure and by devices diffusing it intensely.
Or, our phones meet standards well below the permitted limits. Especially since the researcher has tried these blue light protections and they are only marginally effective against an already not dangerous source.
The physicist reminds us that the sun poses far more risk to the retina than LEDs. Consequently, it's all very well to go outside, but on very sunny days, it's best to wear your UV protective glasses.
Assessments, their tools, methods and effectiveness are regularly called into question. They are at the heart of many debates, even if exchanges of practice between colleagues are limited. In a series of articles, videos and animations, François Muller proposes a more useful, lively and stimulating form of assessment, one that is an integral part of learning. Assessment FOR learning.
In a highly animated world, it's no longer enough to just rely on your reputation. You have to stand out and, most importantly, build a community of followers. That's why even in the cultural world, more and more are using online community facilitators. The museum community has quickly realized the benefits. And now some are thinking about libraries following suit...
Valuing is achieved through actions and commitments that translate into action. These actions demonstrate that value is being placed. Four easy ways, that don't necessarily cost a lot of money but direct action, create an atmosphere, make life easier and allow everyone to participate.
Then we're talking about a very nice job, teaching.
When Montaigne and many others said that "Travel shapes youth", they weren't referring to leisure travel, but rather to more adventurous journeys filled with the unexpected and encounters. What are the ingredients?
How we eat and how we get our food depends on many factors, but we certainly always eat our culture. This thesis on the eating practices of the peoples of the Upper Rio Negro (Brazilian Amazon) also helps us to distance ourselves from our own ways of doing things.