Oil circulation rate is a crucial factor affecting air-conditioning system performance and rotary compressor reliability. This paper illustrates several design concepts to reduce oil circulation rate and discusses their effectiveness. This paper also discusses how to measure the rate in terms of accuracy and repeatability with a statistical significance.

The bacterial flagellar motor of Escherichia coli is a nanoscale rotary engine essential for bacterial propulsion. Studies on the power output of single motors rely on the measurement of motor torque and rotation under external load. Here, we investigate the use of magnetic tweezers, which in principle allow the application and active control of a calibrated load torque, to study single flagell...

introduction: the purpose of this study was to evaluate the efficacy of three methods in removal of resilon/new epiphany self-etch (se) soft resin endodontic obturation system. materials and methods: thirty extracted single rooted human teeth were prepared for endodontic treatment and obturated with resilon/epiphany se. the roots were randomly divided into three groups; group 1 roots were retre...

Anatomy . . . . . . . . . . . . . . . . . . . . . . . e27 Nystagmus . . . . . . . . . . . . . . . . . . . . . . e31 Aetiology and classification of vertigo . . . . . . . e32 History . . . . . . . . . . . . . . . . . . . . . . . . e32 Clinical examination . . . . . . . . . . . . . . . . . e33 Interpretation of the examination . . . . . . . . . . e35 Therapy . . . . . . . . . . . . . . . . . . . ...

Compressor is the single largest consumer of primary energy (usually electricity) in an industrial refrigeration system and often become a focal point for energy efficiency improvement strategies. This is achieved either through the improvement of existing compressor designs, or by the introduction of new designs that is expected to overcome the drawbacks of existing compressors. This paper pre...

OBJECTIVE The objective of this study was to compare the smear layer formed on root canal walls during canal preparation of extracted human teeth by Twisted, Mtwo, and ProTaper rotary nickel titanium instruments. MATERIALS AND METHODS Sixty single rooted human premolar teeth with root curvature <25(0) were selected and randomly divided into three Groups (n= 20 teeth per Group). Three types of...

A synthesiser has been designed for polyphonic (multivoice) singing synthesis. Singing synthesis requires frequent updating of parameters to achieve a natural output sound. These parameters include fundamental frequency, formant frequencies, formant bandwidths, and voice source parameters (such as Open Quotient). The synthesis engine is controlled using a script and a graphical user interface. ...