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We present a highly efficient algorithm for computing the minimum distance between two solids of revolution, each of which is defined by a planar cross‐section region and a rotation axis. The boundary profile curve for the cross‐section is first approximated by a bounding volume hierarchy (BVH) of fat arcs. By rotating the fat arcs around the axis, we generate the BVH of fat tori that bounds the surface of revolution. The minimum distance between two solids of revolution is then computed very efficiently using the distance between fat tori, which can be boiled down to the minimum distance computation for circles in the three‐dimensional space. Our circle‐based approach to the solids of revolution has distinctive features of geometric simplification. The main advantage is in the effectiveness of our approach in handling the complex cases where the minimum distance is obtained in non‐convex regions of the solids under consideration. Though we are dealing with a geometric problem for solids, the algorithm actually works in a computational style similar to that of handling planar curves. Compared with conventional BVH‐based methods, our algorithm demonstrates outperformance in computing speed, often 10–100 times faster. Moreover, the minimum distance can be computed very efficiently for the solids of revolution under deformation, where the dynamic reconstruction of fat arcs dominates the overall computation time and takes a few milliseconds. [ABSTRACT FROM AUTHOR]

The temperature influence of the matching liquid used in the microwave tomography platform system working from 3 to 6 GHz was analyzed on the article. The temperature impact of the matching liquid was found using the measured signal data. If the temperature of the matching liquid is maintained ideally, the measured signal data are obtained the stable data. But, the acquired signal data are obtained the unstable data because the temperature of matching liquid can not be maintained naturally. To obtain the stable data, the temperature control devices are required to maintain the temperature of matching liquid. Furthermore, the temperature variation of the matching liquid in the platform system is the important factor aimed for breast cancer detection. How much impact happened by the temperature variation was studied to overcome the temperature influence of the matching liquid. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2978-2981, 2014 [ABSTRACT FROM AUTHOR]

The article offers information on focused microwave thermotherapy (FMT) which is a noninvasive microwave hyperthermia to increase the temperature of the target location to above 43°C while maintaining a normal temperature in other areas. It presents information on electromagnetic (EM) wave propagation. It mentions information on dielectric map which is created from magnetic resonance imaging or computer tomography.

In this article, we report a new 3-D backlight display for glasses-free 2-D/3-D switchable displays. In this type of 3-D display, 3-D works by line patterned back light unit. But light leakages from the 3-D light guide cause degrade the 3-D performance. We analyze the light leakages from light guide plate and suggest a novel backlight structure design to improve x-talk performance. [ABSTRACT FROM AUTHOR]