The cause of the cave-in is still being investigated, but the age of the city’s sewer system is expected to be a factor. In many places around Petersburg, the sewer infrastructure is more than 100 ...

The authorities in Monemvasia, founded in the sixth century, say people with limited mobility need access to the town’s peak.

Abstract: We examined the design method of a glass Dewar for liquid nitrogen as a cooling apparatus of an HTS-SQUID system for field use. Cooling technique without stressing operators is very ...