An extension for a pipe section integrally pourable in a ceiling for bridging a difference between a length of the pipe section and a thickness of the completed ceiling comprises a flat material and a fastening element and three closure elements formed as adhesive strips. The alarm signal is preferably expressed as a series of square waves. The partial write flag may be configured to indicate whether a previous write operation was a full write or a partial write to the word of data. In another method the user inquiry is received as input and processed on an electronic device networked to a central cloud server comprising a distributed cloud computer system. Other embodiments are disclosed. The computing device excludes pixels corresponding to a non-observed object in a region of interest when computing a time intensity curve.