TPO Roof Replaces Leaking Inverted Roof-Membrane Assembly System. By Dan Hounsell, Editor July 2010 - Roofing Article Use Policy. The problematic roof was an inverted roof-membrane assembly (IRMA), which consisted of a built-up membrane installed over a structural concrete slab and topped by insulation.
DVI vs. VGA. VGA and DVI connectors are used to transmit video from a source (like a computer or tablet) to a display device (like a monitor, TV or projector). The main difference between VGA and DVI is in the way the video signals travel. VGA connectors and cables carry analog signals while DVI can carry both analog and digital.
A DVI-D connector on a graphics card sends out a digital signal only, while a DVI-I connector can send out a digital signal (for digital displays such as flat panel LCD monitors) as well as analog signal (for older displays such as a CRT monitor) using a DVI to VGA adaptor shown below.