elkement - Elke Stangl
elkemental Force is an archive. Everything the elkement has written about: Physics, engineering, information security - plus random musings on life, the universe and everything. Plus weird internet art.
elkemental Force ist ein Archiv. Alles was das elkement verfasst hat zu: Physik, Technik, Informationstechnologie. Und zum Leben, dem Universum und Allem. Plus: 'Internet-Kunst'. Auf Deutsch weniger umfangreich als die Englische Website.
Most textbooks introduce Carnot's cycle for an ideal gas – but the efficiency would not change if the substance had a different equation of state. Motivated by a paper about Carnot's efficiency for a machine using Van der Waals gas, I calculated the efficiency for a more general class of substances.
My writeup of how I owned this box by issuing myself a logon hardware crypto token on behalf of the Administrator – abusing a misconfiguration of certificate templates! I joined a box to the domain, used Kali Linux and Windows in parallel, and ran a fake DNS server with locator records for Active Directory. A software certificate would not have been sufficient – I needed the /smartcard options of net use and runas.
Comparing measurements of the volume of ice in the tank with simulations - based on a model of the control logic, the varying performance factor of the heat pump, heat transport in ground, energy balances for the hot and cold tanks, heat transfer via heat exchangers connected in series.