Zulma's favorite articles

Yesterday there was a deflagration of ether vapour at the chemical institute in Innsbruck (Austria). Such a deflagration is a fast combustion at the boundary surface between the heavy ether vapour and the lighter air above it after ignition. If the ether vapour had been swirled with the air beforehand, there would have been a huge explosion after ignition. But not a detonation . This is because in a detonation, the initial ignition creates a pressure wave that spreads through the expl…

[EN] Dear club members of ipernity! In view of private and professional worries of many members due to the Corona crisis, the ima team discussed whether the general meeting should be postponed. We have decided not to do so. After all, the virus has not yet reached most of us, even though the fear has gone around and we are already experiencing many restrictions in our everyday lives. Fortunately, these do not affect communication via ipernity, which for many members is an important par…

Note: This composite was created from images purchased from Shutterstock When the flames threatened Notre Dame Cathedral, all decent people were filled with horror and sadness. Evildoers such as members of ISIS, though rejoiced especially when word first came out that it was likely to be a total loss. Yet a miracle occurred – yes miracles are still possible in the 21st century despite an unbelieving, skeptical world – and much of the cathedral’s iconic exterior including its famous tower…

[EN] This morning a security certificate for ipernity expired. To update it, we need support from an IT professional. However, due to the weekend and holiday situation, nobody is available. Fortunately, Gerrit Fischer gave us a tip on how to log in anyway. We benefit from the fact that ipernity is not (yet) completely encrypted, but only the login and payment page: You simply backdate the Windows system and then log in. Go with the mouse pointer to the system date in the lower right co…

One of the nicest things about online photography sites like ipernity is how it brings us all together into a close-knit community of like-minded friends. Flickr was my first online photography home and as I began to become a better photographer, I also made new friends. As important as it is to take pictures, it's also very important to look at other people's photography for inspiration, instruction, and often to see the world in a completely different way. Part of my daily routine (unless I…

Well, as time has passed, Flickr has gotten a lot faster and this has made it possible for me to surf around at a reasonable speed again, but now that I have a home here at ipernity too, I have discovered that I now have two heads. :D I don't want to give up my account at Flickr, but I really don't like the way it looks at all. I may have gotten used to it, but I hate it. I feel very out of sorts on Flickr, whereas I feel at home on ipernity. Ipernity has the look I really like, but it also h…