An electro-optic modulator is formed on a silicon-on-insulator rib waveguide. The ozone concentration determination can be applied to vacuum processing chamber, using either novel ozone sensor or existing mass flow meter or controller. The memory includes a network condition detection module configured to detect a network condition of the constrained sensor gateway, and an adaption module configured to determine a reliability score. A second compression element is coupled to the mixer and produces a second compressed refrigerant stream. Moving the lever back to its original position can cause the wings to swing back open, aided by the compression of the sponge. In one embodiment, a remote control comprises an initiation button configured to cause a keyboard with keys to be displayed upon a remote display device.