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In telecommunications, a distribution frame is a passive device which terminates cables, allowing arbitrary interconnections to be made. For example, the Main Distribution Frame (MDF) located at a telephone central office terminates the cables leading to subscribers on the one hand, and cables leading to active equipment (such as DSLAMs and ...
Medium-density fibreboard. Medium-density fibreboard ( MDF) is an engineered wood product made by breaking down hardwood or softwood residuals into wood fibre, often in a defibrator, combining it with wax and a resin binder, and forming it into panels by applying high temperature and pressure. [1] MDF is generally denser than plywood.
Main distribution frame. Small, single-sided MDF for a military base, 1940s. Modern main distribution frame. In telephony, a main distribution frame ( MDF or main frame) is a signal distribution frame for connecting equipment ( inside plant) to cables and subscriber carrier equipment ( outside plant ).
Media Descriptor File ( MDF) is a proprietary disc image file format developed for Alcohol 120%, an optical disc authoring program. Daemon Tools, CDemu, MagicISO, PowerDVD, and WinCDEmu can also read the MDF format. [1] [2] A disc image is a computer file replica of the computer files and file system of an optical disc .
Engineered wood. Engineered wood, also called mass timber, composite wood, human-made wood, or manufactured board, includes a range of derivative wood products which are manufactured by binding or fixing the strands, particles, fibres, or veneers or boards of wood, together with adhesives, or other methods of fixation [1] to form composite ...
Laminated veneer lumber (LVL) is an engineered wood product that uses multiple layers of thin wood assembled with adhesives. It is typically used for headers, beams, rimboard, and edge-forming material. LVL offers several advantages over typical milled lumber: Made in a factory under controlled specifications, it is stronger, straighter, and ...
Description. Hardboard is similar to particle board and medium-density fiberboard, but is denser and much stronger and harder because it is made out of exploded wood fibers that have been highly compressed. [3] Consequently, the density of hardboard is 500 kg/m 3 (31 lb/cu ft) or more [4] and is usually about 800–1,040 kg/m 3 (50–65 lb/cu ...
Member check. In qualitative research, a member check, also known as informant feedback or respondent validation, is a technique used by researchers to help improve the accuracy, credibility, validity, and transferability (also known as applicability, internal validity, [1] or fittingness) of a study. [2]