OBJECTIVE To assess the hydrodynamic properties of three new types of hydrocephalus valve. METHODS Three new constructions have been recently tested in the UK shunt Evaluation Laboratory: the magnetically adjustable Strata Valve (Medtronic PS Medical), the gravitational Miethke Dual-Switch Valve (Aesculap) and the ventriculo-sinus SinuShunt (CSF Dynamics). Pressure-flow performance curves wer...

A neutral background pressure map of the large vacuum test facility sLVTFd is presented. The LVTF is mapped at cold anode flow rates of 5.25, 10.46, and 14.09 mg/s. In addition, neutral background pressure maps are created at hot anode si.e., discharge ond flow rates of 5.25 and 10.46 mg/s for discharge voltages of 300 and 500 V, corresponding to P5 Hall thruster operating conditions ranging fr...

Even though efficiency of coal-fired power plant is proportional to operating temperature, increase of operating temperature is limited by a technological level of each power plant components. It is an alternative plan to increase operating pressure up to ultra super critical (USC) point for efficiency enhancement. It is difficult to control the system in that pressure within safety guideline t...

Background: Endotracheal tube (ETT) intracuff pressure (PINTRACUFF) monitoring is not a mandatory part of daily anesthetic practice in many countries. Correct PINTRACUFF required to ensure adequate ventilation, prevent aspiration, and avoid complications. The aim this study was objectively measure the ETTs among patients from an Australian tertiary hospital define range values seen setting with...

In this paper, fluid flow and heat transfer in the laboratory (small size) shell tube heat exchanger are analysed by computational fluid dynamic software. In this type of shell tube heat exchanger baffles with different angles of rotation: 00 (horizontal segmental baffle), 150 (from horizontal), 300, 450, 600, 750, 900 (vertical segmental baffle) is used. Effect of baffle orientation on shell t...