Recently, we examined energy dissipation in a new class of cantilever device that embeds a microfluidic channel in its interior-the fundamental mode of vibration only was considered. Due to its importance in practice, we examine the effect of mode number on energy dissipation in these microfluidic beam resonators. Interestingly, and in contrast to other cantilever devices, we find that the quality factor typically decreases with increasing mode number. We explore the underlying physical mechanisms leading to this counterintuitive
behavior, and provide a detailed comparison to experimental measurements for which good agreement is found. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3514100]“
“Objectives. INCB024360 Severe dental malocclusion resulting from mandibular advancement devices (MADs) for obstructive sleep apnea syndrome (OSAS) is extremely rare. Reporting of such situations is therefore useful for clinicians managing OSAS.
Study design. We report the unusual cases of 4 patients who developed a severe circular dental open bite related to the use of a MAD. These bite changes were related to molar extrusion in two patients, whereas in the other two patients no obvious etiology was found.
Results. In all patients, the MAD was immediately discontinued as early as the malocclusion was detected and continuous positive airway pressure proposed.
Conclusion. Mandibular advancement devices may
be associated with a severe dental malocclusion. Failure to recognize and promptly treat this complication may lead to irreversible dentoskeletal changes. Therefore, follow-up to survey dental occlusion SNX-5422 nmr is mandatory in all patients wearing a MAD. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2010; 109: e28-e32)”
“The electrorheological fluid
composed of starch particles and silicone oil/transformer oil was dispersed into 107 silicone rubber, and then two types of electric elastomers were prepared in the absence and presence of EPZ004777 supplier a curing electric field, respectively. The storage modules were measured using dynamic mechanical analysis with the round disk compression clamp. The results indicate that the storage modulus sensitivity of electric elastomers composed of pure transformer oil is the highest, that of electric elastomers composed of pure silicone oil takes second place, and that of electric elastomers composed of mixture oil is the smallest. For the given starch concentration, the storage modulus sensitivity attains a maximum value of 3.88 when the mass ratio between the transformer oil and 107 silicone rubber is 1. For the given mass ratio of 1, the effects of starch concentration and the presence or absence of the curing electric field on the storage modulus of electric elastomers were studied. When the starch concentration is 5 wt %, the storage modulus of the elastomer without the electric field (denoted as A-elastomer) is 20.