منابع مشابه
Measuring Low Frequency Tilts
A borehole tiltmeter with a sensitivity of a few nanoradians is described. It is composed of two orthogonal horizontal pendulums with free periods of 1 s. The pendulums are insensitive to barometric pressure fluctuations, and the measured temperature coefficient is less than 30 nrad/°C. The range of the pendulums is about ±5 μ rad, and their response is linear within 1% and stable over several ...
متن کاملMeasuring and Modeling Low Frequency Dispersion in GaAs MESFET
by Hemraj Singh Sodhi Submitted to the Department of Electrical Engineering and Computer Science in partial fulfillment of the requirements for the degree of Master of Electrical Engineering and Computer Science at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY May 1996 © 1996 Massachusetts Institute of Technology. The author hereby grants permission to MIT to reproduce and distribute publicly paper...
متن کاملTrisomy 21 tilts the balance.
Approximately 5% of children with Down syndrome (DS) are born with a unique transient clonal megakariyo-erythroblastic proliferation disorder often called transient myeloproliferative disorder (TMD). Spontaneous recovery usually occurs within up to several months. However, about one-fifth of these patients will develop full-blown acute leukemia with biphenotypic megakaryocyticerythroid features...
متن کاملTilts in Strong Ground Motion
Most instruments used in seismological practice to record ground motion are pendulum seismographs, velocigraphs, or accelerographs. In most cases it is assumed that seismic instruments are only sensitive to the translational motion of the instrument’s base. In this study the full equation of pendulum motion, including the inputs of rotations and tilts, is considered. It is shown that tilting th...
متن کاملMeasuring frequency of spontaneous swallowing.
A new multi-sensory non-invasive portable system capable of detecting spontaneous swallowing in a patient population has been developed. Swallowing signals are recorded via Electromyogram (voltage potentials generated by throat muscles), an accelerometer (laryngeal elevations) and a microphone (cervical auscultation) affixed to the neck at the coniotomy region. Simultaneous signal comparison of...
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ژورنال
عنوان ژورنال: Journal of Research of the National Institute of Standards and Technology
سال: 1993
ISSN: 1044-677X
DOI: 10.6028/jres.098.014