The effect of the temperature variation on a unimorph piezoelectric cantilever is studied. Its influences on the thermal expansion, the piezoelectric constant, the transient part and the creep are experimentally analyzed. Afterwards, a H∞ controller is synthesized in order to reject the thermal disturbance and to reach performances required in micromanipulation. Finally, the closed-loop experim...

this article studied static deflection, natural frequency and nonlinear vibration of a clamped-clamped microbeam under discontinues electrostatic actuation. the electrostatic actuation was induced by applying ac-dc voltage between the microbeam and electrode plate. in contrast to previous works, it was assumed that length of the electrode plate was smaller than that of the microbeam. in additio...

talon cusp is a rare developmental anomaly that occurs most commonly on the lingual side of the incisors. occurrence of the labial talon cusp is rare in the dental literature. till date only seven cases of isolated nonsyndromic labial talon cusps have been reported in the maxillary permanent dentition. however, a few cases of syndromic labial talon cusps and faciolingual talon cusps have been r...

Fig. 1. A photograph captured intraoperatively (a) and schematic representation of QAV (b) as viewed through the aortotomy. The right and left coronary cusps were almost normal in size and had sufficient effective height. While the noncoronary cusp (NCC) was relatively thick and large, the accessory cusp (AC) was too small to independently act as a competent cusp. The raphe between the NCC and ...

OBJECTIVES Successful aortic valve repair must normalize cusp and root dimensions. Limited information is available on the normal dimensions of human cusps, in particular the cusp height. METHODS The cusp height was measured intraoperatively in 621 patients during aortic valve repair procedures. A tricuspid anatomy was present in 329 patients and bicuspid in 286 patients. In addition, patient...

A patient with multiple anomalies of the maxillary teeth, including shovel-shaped incisors, talon cusp, bilateral dens invaginatus and bilateral peg-shaped supernumerary incisors is reported. The patient also exhibited Carabelli's cusp on both maxillary first molars. No developmental syndrome was identified. This very unusual combination of anomalies has not been reported previously.

Earth's cusp proton aurora occurs near the prenoon and is primarily produced by the precipitation of solar energetic (2-10 keV) protons. Cusp auroral precipitation provides a direct source of energy for the high-latitude dayside upper atmosphere, contributing to chemical composition change and global climate variability. Previous studies have indicated that magnetic reconnection allows solar en...

Talon cusp is a rare developmental anomaly that occurs most commonly on the lingual side of the incisors. Occurrence of the labial talon cusp is rare in the dental literature. Till date only seven cases of isolated nonsyndromic labial talon cusps have been reported in the maxillary permanent dentition. However, a few cases of syndromic labial talon cusps and faciolingual talon cusps have been r...

Talon cusp is a rare developmental extra cusp-like projection on the cingulum area of affected anterior teeth that may cause various functional and aesthetic problems. The present report describes a case of bilateral palatal talon cusps on permanent maxillary incisors and the treatment procedure to overcome the clinical problems associated with talon cusps.