STM


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STM

(1) (Synchronous Transport Module) The European designation of SONET channel speeds. See STS and SONET.

(2) (Scanning Tunneling Microscope) A microscope that can image down to the atomic level. An STM uses a piezoelectric tube with a tiny sharp tip at the end that is moved within nanometers of the object being sampled. As it gets close, the voltage applied to the tip causes a "tunneling" current to flow to the object. As the tip is moved and bumps into an obstruction, the current changes. In order to maintain a certain constant current, the tip is raised and lowered accordingly, and this movement pattern is magnified and displayed on screen. See AFM, microscopy and nanotechnology.
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References in periodicals archive ?
STM has a Gibraltar Life Insurance Company, STM Life plc, which provides life insurance bonds - wrappers in which a variety of investments, including investment funds, can be held.
All this was simplified and swept away by the creation of CrossRef, an outcome of a series of discussions at the STM board in the late 1990s.
NHI's STM for Concrete Structures course aims to address the uncertainties behind using STM and act as a primary source of reference material
STM then showed their class, with Ryan Tranter scoring eight minutes from time to make it 4-3.
STM provides listings for informational purposes only and makes no guarantees as to the accuracy of the listings.
Human lung cancer cells (A549 and NCI-H1650) and normal lung cells (NL-20) were incubated with the indicated concentrations of STM for 24 h in 96-well plates and cell viability was determined by MTT assay as described by us previously [16].
The historical period of the STM (1926-1949) was coeval with the STM-Journal (1925-1950), which comprised of the full-blown era of tropical medicine on the Island during the second quarter of the 20th century.
Organised by Al-Harithy Group -- ACE Creative, STM was a specialised meeting where Sabic officials and researchers gathered every other year to exchange technical knowledge and get acquainted state-of-the-art technologies.
The largest change in DAWIA STM certification in recent years is in the training requirements, with two of the three required STM courses new for Fiscal Year (FY) 2016.
STM has been identified as the foundation of wealth creation and an imperative for national development.
The Student Technology Mentor (STM) program was an initiative of the college's new Center for Teaching and Learning (CTL) and was initially linked to the center's yearlong Designed for Learning seminar.