68 research outputs found

    In My View

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    Papers of Joseph Hone Index: Royal Society Collection

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    Letter from J. Hone to J.B.Mather 5 Feb 1855 and official notification of appointment of Joseph Hone as Commissioner of Insolvent Estates for Hobart 2 Aug. 1839 RS. 2

    Nano-Bio-Technology and Sensing Chips: New Systems for Detection in Personalized Therapies and Cell Biology

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    Further advances in molecular medicine and cell biology also require new electrochemical systems to detect disease biomarkers and therapeutic compounds. Microelectronic technology offers powerful circuits and systems to develop innovative and miniaturized biochips for sensing at the molecular level. However, microelectronic biochips proposed in the literature often do not show the right specificity, sensitivity, and reliability required by biomedical applications. Nanotechnology offers new materials and solutions to improve the surface properties of sensing probes. The aim of the present paper is to review the most recent progress in Nano-Bio-Technology in the area of the development of new electrochemical systems for molecular detection in personalized therapy and cell culture monitoring

    Long-Lived Phonon Polaritons in Hyperbolic Materials

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    Natural hyperbolic materials with dielectric permittivities of opposite signs along different principal axes can confine long-wavelength electromagnetic waves down to the nanoscale, well below the diffraction limit. Confined electromagnetic waves coupled to phonons in hyperbolic dielectrics including hexagonal boron nitride (hBN) and α-MoO3 are referred to as hyperbolic phonon polaritons (HPPs). HPP dissipation at ambient conditions is substantial, and its fundamental limits remain unexplored. Here, we exploit cryogenic nanoinfrared imaging to investigate propagating HPPs in isotopically pure hBN and naturally abundant α-MoO3 crystals. Close to liquid-nitrogen temperatures, losses for HPPs in isotopic hBN drop significantly, resulting in propagation lengths in excess of 8 μm, with lifetimes exceeding 5 ps, thereby surpassing prior reports on such highly confined polaritonic modes. Our nanoscale, temperature-dependent imaging reveals the relevance of acoustic phonons in HPP damping and will be instrumental in mitigating such losses for miniaturized mid-infrared technologies operating at liquid-nitrogen temperatures.Research at Columbia is supported by Vannevar Bush Faculty Fellowship ONR-VB: N00014-19-1-2630. We thank A. Sternbach and S. Zhang for helpful discussions. Exfoliation and transfer of hBN onto desired substrates and electron beam lithography of gold disks were performed by J.T.M. and supported by the National Science Foundation (DMR1904793). Additional structure fabrication was supported by the Center on Precision-Assembled Quantum Materials, funded through the U.S. National Science Foundation (NSF) Materials Research Science and Engineering Centers (award no. DMR-2011738). Initial simulations and experimental design from Vanderbilt were provided by J.D.C. in collaboration with the Columbia team (D.N.B. and G.N.) and was supported by the Office of Naval Research (N00014-18-1-2107). The hBN phonon band structure calculation was performed by R.C. and L.A. and supported by the Spanish MINECO/FEDER grant (MAT2015-71035- R). Cryogenics nano-optics experiments at Columbia were solely supported as part of Programmable Quantum Materials, an Energy Frontier Research Center funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), under award no. DE-SC0019443. D.N.B is the Gordon and Betty Moore Foundation’s EPiQS Initiative Investigator no. 9455.Peer reviewe

    The end of the line: literature and party politics at the accession of Queen Anne

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    This thesis provides the first full-length account of the political and cultural significance of the accession of Queen Anne. It offers a critical reassessment of the politics of the royal image across a spectrum of texts, events, and artefacts—from panegyrics, newspapers, sermons, royal progresses, and processions to medals, coins, and playing cards. Recent scholarship has emphasized the importance of party politics to the literature and culture of the early eighteenth century. This thesis nuances that assumption by arguing: (1) that the principal focus of partisan texts was competing representations of monarchy; and (2) that the explosion of partisanship at the start of the eighteenth century was triggered by unrest about the royal succession. Anne was the last protestant Stuart. She had no surviving children. This thesis explores how authors such as Daniel Defoe, Joseph Addison, Alexander Pope, and a great many lesser known and anonymous writers and propagandists conceptualized the end of the Stuart dynasty. Anne's accession forced writers to conjecture on the future succession. There were two rival claimants to the throne after Anne’s death: the protestant Electress Sophia of Hanover and Anne's Catholic half-brother, James Francis Edward. Sophia's claim was statutory, James's hereditary. Factions emerged in support of both claimants. Almost all topical writing took a stance on the issue. Many sided with the government, supporting Hanover. Yet some writers favoured the illegal but hereditary claim of James Francis Edward; they had to express support in covert ways. This succession crisis triggered not only printed polemic, but also swathes of clandestine manuscript literature circulating in the Jacobite underground. The government took a hard line on Jacobite writers and printers; this thesis documents both their persecution and the techniques they used to evade the law. The thesis concludes by suggesting that this oppositional literary culture only disintegrated after the defeat of the Jacobite rebellion, and the consequent settlement of the Hanoverian succession, in late 1716. After this point, royal succession ceased to be a major source of political discontent.</p

    Irish Public Opinion

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    Happiness in Holidays

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