The purpose of this study was to quantify the performance and agreement between two different external surrogate acquisition systems: Varian's Real-Time Position Management (RPM) and Philips Medical Systems' pneumatic bellows, in the context of waveform and 4D CT image analysis. Eight patient displacement curves derived from RPM data were inputted into a motion platform with varying amplitudes ...

One of the bellows producing method is hydroforming process .Whereas some factor of hydroforming process specially internal pressure affects on final characteristics produced bellows such as bursting, wrinkling and wall thickness distribution. In this paper the effect of internal pressure factor in final quality of produced bellows will be investigated. In simulation of process, ABAQUS/Explicit...

For origami structures, perforating or cutting slits along creases is an effective method to define fold lines and alleviate stress concentrations at vertices. In this letter we show numerically experimentally that for non-rigid-foldable bellows (e.g. Miura-ori, Kresling patterns) the introduction of small cut-outs vertices results in up order magnitude reduction bellows’ stiffness under axial ...

We present a rapid, high-yield fabrication process for Parylene C microbellows for large deflection applications and their characterization. Bellows having different convolution number, wall thickness, inner diameter and outer diameter and layer height were fabricated using a lost wax-like process. The effect of design parameters on overall bellows performance was evaluated through load–deflect...

Examining how increasing distance affects the information content of vocal signals is fundamental for determining the active space of a given species' vocal communication system. In the current study we played back male koala bellows in a Eucalyptus forest to determine the extent that individual classification of male koala bellows becomes less accurate over distance, and also to quantify how i...

This paper investigates the reliability of welded metal bellows used in mechanical seals under specified working conditions. Firstly, considering environment and structural characteristics bellows, a stress relaxation test bench was developed to obtain projectile loss data different compression loads at elevated temperatures. The creep constants for simulation were derived from experimental dat...

The ability to signal individual identity using vocal signals and distinguish between conspecifics based on vocal cues is important in several mammal species. Furthermore, it can be important for receivers to differentiate between callers in reproductive contexts. In this study, we used acoustic analyses to determine whether male koala bellows are individually distinctive and to investigate the...

I. How Tuner Works The B-cell superconducting cavity is tuned by mechanically stretching the cavity along the beam line relative to the cryostat. The drive train consists of a stepping motor followed by a 4.38:1 dual leverage mechanism terminating in a dual parallel flex hinge arrangement (tuner flexure) with mechanical advantage of 3.9:1. The flexure is patterned after the proposed LANL PILAC ...

with the base and a membrane hinge is cemnented on (C). A writing lever (not shown in the illustration) is attached to the top surface. The bellows is now made ready for use by smearing generously a layer of paraffin oil on the membrane, thus not only sealing any microscopic holes, but rendering it more flexible. These bellows may be made of any volume capacity to fulfil a particular conadition...