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.
DVI connectors come in 3 varieties. 1  DVI-A can transmit analog signals, allowing it to be backwards compatible with VGA (useful for CRT monitors and LCDs of lower quality). 2  DVI-D can transmit the newer digital signals. 3  DVI-I is capable of both analog and digital. 4  In certain cases, you may need a VGA-to-DVI or DVI-to-VGA converter cable. HDMI (High Definition Multimedia Interface) In the past decade, high-definition broadcasts became the new standard of what it means to be high quality. Unlike VGA and DVI, HDMI sends both video and audio signals together. The signals are digital only; thus, HDMI is only compatible with newer devices.