A system and method for performing hydrothermal treatment includes reactor vessel formed with a pressure bearing wall surrounding a reactor chamber. In one embodiment, the portable computing devices are mobile phones and each user may independently rate a currently playing musical piece within the physical place by sending an electronic message from their phone, for example in SMS format. An open lockbox provides a pivot with lateral support to maintain alignment of the lateral surfaces. The size, shape and configuration of the lobes may be varied between different regions of the cushion insert so that different regions of the cushion insert provide different supportcushioning characteristics. A second wing has proximal and distal sleeves mounted at opposite ends of the center sleeve. The system includes an integrating voltage counter electrically coupled to an electrical power bus, wherein the integrating voltage counter is configured to integrate over time a voltage signal received from the power bus and to generate a trigger signal when the integrated voltage signal equals a predetermined count.