. . . . "The heat flow across a surface per unit area per unit time, divided by the negative of the rate of change of temperature with distance in a direction perpendicular to the surface." . . . "Thermal conductivity" . "thermal conductivity of substance" . . . . . "Christos Vasileiou" . "2026-01-26T09:45:33.856Z"^^ . . . . . . . . . . . "RSA" . "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz1OobdRASd9SftHrLhG905OXjv8DHndvyWzXRJ5EDFPankMSnHZPHK+g2qEeRWdonstt55CLrpTpWsVv9xRtTqPidXHbnWLBXX42iCB+EnZNoKqAVKF5GxkSR38S0uTTq3aeQJbw2kTpx6LMkspmuH95fgAI/lfqPWrxdlI98jIeHQ14UXZpiWmkkvPgC9GVgmwHiG1hB/NCA2fKCOxVodN44OfhAPtkWmPJ40IcGPSalI4HRqgLLI5PabdRk3PiG81cUngmQU1Xk6EapzkRJGenkOlGsC5L4ktEPO6LS9uBMLTMLQDtGtkrcwqg5HmeKv7Ili3vgr3LL8/GaBBOLQIDAQAB" . "Ntc9lioEaHbJVwYsbBTIT/QhamuG96zRKyu0WBPXiKkIc0fCRREsacx36uBzqNP4v3IjULYmo4scnfRVcWHCVTV0lY9xWV1opwr64748oMHiKzBhgGO4WIVdWF/A/OFdps5e2dl9pi12bUYKm78xKnfCE075r5y3fWypcQa+PMP1XoXkbv8lRJRvMUH19F5yLs64JrM5k3qd+tzwdykLueGxziskvX0Mlt8r9fyEFgTFcseTShWFCFoCrPx+j0WP+lrMDf7vMASR+QMTfchRqdUvfP/+p+Yqe2oeqZZVjT9tb8kF0jOiiEfmD44nj+SD6LQwve2EvIznudhxGDO/9A==" . . .