Angular Acceleration Sensor Composed of Two Discs and Optical Pick-Up

A Novel Permanent Magnetic Angular Acceleration Sensor

Angular acceleration is an important parameter for status monitoring and fault diagnosis of rotary machinery. Therefore, we developed a novel permanent magnetic angular acceleration sensor, which is without rotation angle limitations and could directly measure the instantaneous angular acceleration of the rotating system. The sensor rotor only needs to be coaxially connected with the rotating s...

A micromachined angular-acceleration sensor for geophysical applications

An Analysis Of Optical Pick–up In SCUBA Data

The Sub-millimetre Common User Bolometer Array (SCUBA) at the JCMT employs a chopping and nodding observation technique to remove variations in the atmospheric signal and improve the long term stability of the instrument. In order to understand systematic effects in SCUBA data, we have analysed single–nod time streams from across SCUBA’s lifetime, and present an analysis of a ubiquitous optical...

Lower Schwarz–pick Estimates and Angular Deirivatives

The well-known Schwarz–Pick lemma states that any analytic mapping φ of the unit disk U into itself satisfies the inequality |φ′(z)| ≤ 1− |φ(z)| 2 1− |z|2 , z ∈ U. This estimate remains the same if we restrict ourselves to univalent mappings. The lower estimate is |φ′(z)| ≥ 0 generally or |φ′(z)| > 0 for univalent functions. To make the lower estimate nontrivial we consider univalent functions ...

a comparative analysis of the marginal microleakages of two pit and fissure sealans, conseal-f and conseal clear

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