We study the problem of placing a set T of broadcast towers in a simple polygon P in order for any point to locate itself in the interior of P . Let V (p) denote the visibility polygon of a point p, as the set of all points q ∈ P that are visible to p. For any point p ∈ P : for each tower t ∈ T ∩ V (p) the point p receives the coordinates of t and the Euclidean distance between t and p. From th...

This paper presents a state-of-the-art whispering gallery mode (WGM) thermometer system, which could replace platinum resistance thermometers currently used in many industrial applications, thus overcoming some of their well-known limitations and their potential for providing lower measurement uncertainty. The temperature-sensing element is a sapphire-crystal-based whispering gallery mode reson...

We are developing high quality factor whispering gallery mode resonator (WGMR) disks for use in quantum information experiments. Our polished lithium niobate disks achieved a quality factor on the order of 10. We report the use of Type-I noncritical phase matching in a lithium niobate whispering gallery mode resonator disk to produce optical second harmonic generation at λ = 532nm. This process...

Ingrid Beazley Jonathan P. Bowen Alison H.Y. Liu Sarah McDaid Dulwich Picture Gallery Museophile Limited National Taiwan Normal University London South Bank Univ. Gallery Road London SE21 7AD United Kingdom Oak Barn, Sonning Eye Reading RG4 6TN United Kingdom No. 19, Da-Tong West Road Taoyuan City Taiwan, R.O.C. Faculty of Business Borough Road London SE1 0AA, UK [email protected] ...

We study the problem of guarding orthogonal art galleries with horizontal mobile guards (alternatively, vertical) and point guards, using “rectangular vision”. We prove a sharp bound on the minimum number of point guards required to cover the gallery in terms of the minimum number of vertical mobile guards and the minimum number of horizontal mobile guards required to cover the gallery. Further...

An exact solution for the problem of interaction between whispering gallery modes of spherical microresonators and a single dipole is presented. It is predicted that experimentally observed spectral doublets associated with this interaction are a part of a triplet whose third component has yet to be observed. It is also shown that the interaction between the dipole and nonresonant whispering ga...

We have begun a compilation of H i maps of peculiar galaxies kindly contributed by individual investigators, many as part of the “Gas & Galaxy Evolution” conference. In this gallery we present images of the first ∼180 objects, which includes over 400 individually cataloged galaxies. The images consist of a greyscale representation of the optical morphology and an accompanying optical image with...

Within the study of a mechanism exporting works by Ukrainian artists during 1970s and first half 1980s to Japan, paper covers activities Gekkoso Gallery (Tokyo) its president Mrs. Yoko Nakamura. The institutional aspects export official Soviet (and specifically Ukrainian) art, as well hierarchical relations organizations involved in process, are revealed on this example cooperation with Gallery...

We review recent advances in the application of dielectric whispering-gallery (WG) resonators in optics and photonics, tracing the growth of the technology from the experiments with freely flying spherical droplets of transparent liquids to integrated on-chip microresonators. Both passive (such as filters) and active (such as lasers) whispering-gallery-mode (WGM)-based devices are discussed. Pr...

Two organic sensitisers 4-biphenylcarboxylate (BPC) and terephthalate (TA) were intercalated into the gallery of layered europium hydroxide (LEuH). PL spectra tests indicated that BPC markedly enhanced the red luminescence of Eu(3+) due to efficient energy transfer between BPC and Eu(3+), forming a contrast to intercalated TA and the starting NO(3)(-) anions in the gallery. The energy level mat...