In order to improve the environmental adaptability and sealing performance of the rotating seal, the principles and failure mechanisms of the rotating seal in ambient pressure in deep-sea is researched. It is proposed that the excessive friction caused by the ambient pressure and the magnitude of interference is the main reason for rotating seal failure. To reduce friction effect, a combined li...

'During a consultation there are two people at work. While the doctor is searching for a diagnosis, the patient is quietly summing up the doctor. And it is often the patient who reaches his conclusion first.' This quote from William Evans illustrates how the consultation involves a two-way analysis by both doctor and patient.

The purpose of this study to clarify the factors an effecting lip seal in Japanese adults with malocclusion. Sixty-three malocclusion patients aged 20 to 27 years were randomly selected and compared with fourteen normal occlusion controls aged 22 to 26 years old. The subjects were divided into a good seal group and a poor lip seal group by observing the distance between the upper and lower lip ...

The disturbances of orofacial functions lead to abnormal growth and development of the orofacial complex. The aim of the study was to determine the prevalence of incompetent lip seal and respiration disturbance, and to improve the understanding of correlation between incompetent lip seal and morphological malocclusions. In the sample of 84 children (45 girls and 39 boys, aged 8.96 +/- 0.66 year...

The relining of complete dentures involves solving all of the problems encountered in the construction of new dentures, except positioning individual teeth. The first and most important problem is to achieve a healthy condition of the tissues of the basal seat for the dentures. To do this, the patient must be without his dentures for at least 24 hours before the impressions are made. The dentis...

To assess the potential effects of persistent organic pollutants (POPs) on the expression of cytochrome P450 (CYP) 2B and 3A isozymes in Baikal seal, the 5′-flanking regions of these CYP genes were isolated, and transactivation analysis was performed by in vitro reporter gene assay system. The 3.2 kbp of CYP2B and 2.2 kbp of CYP3A gene promoter/enhancer regions were cloned and sequenced from Ba...

The rotordynamic and leaking characteristics of two types of gas damper seals, honeycomb seal and pocket damper seal, were experimentally evaluated on a rotating test rig. The effect of supply pressure, preswirl, and seal eccentricity on seal dynamic performance was investigated in the tests. The pressurized working gas flowed through the seal and exhausted to atmospheric conditions. The maximu...

Throughout A Treatise of Human Nature, David Hume seems to suggest that some perceptions of the mind have the capability to represent, but he is not completely explicit regarding which perceptions are capable of representing. His account of impressions and ideas leaves some room to speculate about which perceptions can represent, and which possess intentional content: ideas are considered to re...

The recent fuss over one man's ambition to 'make Man in his own image' lends poignancy to Multiplicity, the current exhibition at the Wellcome Trust in London. Timed to coincide with the first anniversary of the arrival of Dolly the cloned sheep, the exhibition presents the reactions of 24 artists to cloning and genetic engineering. Some of the pictures, like Dave Roberts' mixed media 'Blueprin...