Thin walled large structures are widely used for pipes, bridges, wings and body of aircrafts, and automobile bodies. To maintain such large structures, in addition to visual inspection, non-destructive testing with X-ray and ultrasonic is periodically implemented for essential parts. In ultrasonic non-destructive testing, ultrasonic pulse echo technique is generally used, in which plate thickne...

The forehead flap is one of the oldest flaps used to reconstruct upper face and remains a useful option. defect due this often healed by secondary intention; however, rarely performed in Asians increased frequency conspicuous scars. Our patient was 38-year-old Caucasian male who underwent reconstruction for rare dermatofibrosarcoma protuberans. After surgery, there positive margin; therefore, a...

For the scalar wave equation in periodic structures, we establish rigorously the emergence of a spectral bandgap as a frequency interval of exponentially small transmission of energy through a slab of the crystal when the thickness of the slab tends to infinity. We extend the result to slabs that contain a planar defect for frequencies that do not coincide with guided mode frequencies for the d...

The patient had pneumocephalus due to a bony defect at the level of his scalp tumour. As shown in fig 1, the frontal lobes are compressed and the interhemispheric space between the two tips of the frontal lobes gives rise to the “Mount Fuji” sign, named after its resemblance to the silhouette of the Japanese volcano. A CT of the vertex on a bone window (fig 2) shows the scalp defect, with exten...

The unique requirements of soft tissue coverage of the hand offer a challenge for the surgeon dealing with such defects. Local excision of such lesions may end in a defect that is not amenable to primary closure. Management of such defects requires the application of a graft or flap. We describe the application of a rotation flap for closure of a large defect on the dorsum of the hand following...

We demonstrate that twisting one part of a chiral photonic structure about its helical axis produces a single circularly polarized localized mode that gives rise to an anomalous crossover in propagation. Up to a crossover thickness, this defect results in a peak in transmission and exponential scaling of the linewidth for a circularly polarized wave with the same handedness as structure. Above ...

Guided wave focusing has been developed as a promising technique for defect detection in pipeworks, where non-axisymmetric flexural modes are tuned so that ultrasonic energy can be focused at a target point in a pipe. If a defect is located at the target point, large amplitude reflected waves can be observed. In this study, the focusing phenomenon is analyzed using a semi-analytical finite elem...

Early prosthetic treatment is believed to be psychologically beneficial to children who have an ear defect resulting from congenital malformation. Lack of soft tissue landmarks and minimal bone thickness in deformed auricular areas are sometimes problematic for craniofacial implant placement in these children. This article describes procedures to confirm locations of craniofacial auricular impl...

This case report describes the early results of a 36-year-old man who underwent repair of a symptomatic full-thickness patellar cartilage defect with transplanted particulated juvenile articular cartilage. At 2 years postoperatively, the patient has experienced substantial clinical improvement in both pain and function when evaluated with both International Knee Documentation Committee subjecti...