12,986 research outputs found

    Co‐operative cross‐platform courseware development

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    The UKMCC (UK Mathematics Courseware Consortium) is a Consortium funded under TLTP (Training and Learning Technology Programme) to produce courseware for service mathematics teaching, using the SEFI (SociĂ©tĂ© EuropĂ©enne pour la Formation des IngĂ©nieurs) syllabus. There are agreed courseware design guidelines and a simple courseware management system which allows cross‐referencing. Courseware is divided into modules, with an author as implementer for each. On any one hardware platform, a variety of authoring languages is possible. Across hardware platforms, the design guidelines ensure that conversion is possible, and will preserve look and feel. We argue here that these arrangements provide a basis for continued co‐operation between authors and future development as the technology changes

    Reading leadership through Hegel’s master/slave dialectic: towards a theory of the powerlessness of the powerful

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    YesThis paper develops a theory of the subjectivity of the leader through the philosophical lens of Hegel’s master/slave dialectic and its recent interpretation by the philosopher Judith Butler. This is used to analyse the working life history of a man who rose from poverty to a leadership position in a large company and eventually to running his own successful business. Hegel’s dialectic is foundational to much Western thought, but in this paper, I rashly update it by inserting a leader in between the master, whose approval the leader needs if s/he is to sustain self-hood, and the follower, who becomes a tool that the leader uses when trying to gain that elusive approval. The analysis follows the structure of Butler’s reading of the Dialectic and develops understanding of the norms that govern how leaders should act and the persons they should be. Hard work has become for leaders an ethical endeavour, but they grieve the sacrifice of leisure. They enjoy a frisson of erotic pleasure at their power over others but feel guilt as a result. They must prove their leadership skills by ensuring their followers are perfect employees but at the same time must prove their followers are poor workers who need their continued leadership. This leads to the conclusion that the leader is someone who is both powerful and powerless. This analysis is intended not to demonize leaders, but to show the harm that follows the emphasis on leadership as a desirable and necessary organizational function

    Alien Registration- Harding, Booth H. (Madison, Somerset County)

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    https://digitalmaine.com/alien_docs/6583/thumbnail.jp

    Housing Discrimination as a Basis for InterdistrictSchool Desegregation Remedies

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    Nanophotonic hybridization of narrow atomic cesium resonances and photonic stop gaps of opaline nanostructures

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    We study a hybrid system consisting of a narrowband atomic optical resonance and the long-range periodic order of an opaline photonic nanostructure. To this end, we have infiltrated atomic cesium vapor in a thin silica opal photonic crystal. With increasing temperature, the frequencies of the opal's reflectivity peaks shift down by >20% due to chemical reduction of the silica. Simultaneously, the photonic bands and gaps shift relative to the fixed near-infrared cesium D1 transitions. As a result the narrow atomic resonances with high finesse (f/df=8E5) dramatically change shape from a usual dispersive shape at the blue edge of a stop gap, to an inverted dispersion lineshape at the red edge of a stop gap. The lineshape, amplitude, and off-resonance reflectivity are well modeled with a transfer-matrix model that includes the dispersion and absorption of Cs hyperfine transitions and the chemically-reduced opal. An ensemble of atoms in a photonic crystal is an intriguing hybrid system that features narrow defect-like resonances with a strong dispersion, with potential applications in slow light, sensing and optical memory.Comment: 8 pages, 6 figure

    Constraints on the Growth and Spin of the Supermassive Black Hole in M32 From High Cadence Visible Light Observations

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    We present 1-second cadence observations of M32 (NGC221) with the CHIMERA instrument at the Hale 200-inch telescope of the Palomar Observatory. Using field stars as a baseline for relative photometry, we are able to construct a light curve of the nucleus in the g-prime and r-prime band with 1sigma=36 milli-mag photometric stability. We derive a temporal power spectrum for the nucleus and find no evidence for a time-variable signal above the noise as would be expected if the nuclear black hole were accreting gas. Thus, we are unable to constrain the spin of the black hole although future work will use this powerful instrument to target more actively accreting black holes. Given the black hole mass of (2.5+/-0.5)*10^6 Msun inferred from stellar kinematics, the absence of a contribution from a nuclear time-variable signal places an upper limit on the accretion rate which is 4.6*10^{-8} of the Eddington rate, a factor of two more stringent than past upper limits from HST. The low mass of the black hole despite the high stellar density suggests that the gas liberated by stellar interactions was primarily at early cosmic times when the low-mass black hole had a small Eddington luminosity. This is at least partly driven by a top-heavy stellar initial mass function at early cosmic times which is an efficient producer of stellar mass black holes. The implication is that supermassive black holes likely arise from seeds formed through the coalescence of 3-100 Msun mass black holes that then accrete gas produced through stellar interaction processes.Comment: 8 pages, 3 figures, submitted to the Astrophysical Journal, comments welcom
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