Methods and arrangements for facilitating notification among at least two nodes in a distributed network, involving the designation of one of the nodes as a publisher node, the designation of at least one other of the nodes as at least one subscriber node, and the propagation of a transmission from the publisher node to the at least one subscriber node via at least one link. Other apparatus include an organ transporter, an organ cassette and an organ diagnostic device. The first sub-pixel electrode is applied with a first drive voltage. Thereby, the current-carrying paths between the electrode plate groups are short and straight, resulting in reduced internal resistance. The device, by virtue of its functions, is designed for remotely warning in case of need, emergency or danger, any person equipped with a portable receiver-buzzer. Another example comprises: receiving data for a plurality of transaction steps, from a plurality of probes; calculating statistics based on the data; mapping the statistics to at least one threshold value; and outputting a representation of the mapping.