3,190 research outputs found

    Gender, flexibility and opportunity : best use of human resources in UK HE libraries

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    Aims to give an overview of some recent research into human resource (HR) deployment in library services in UK universities and colleges of higher education. The research findings indicate that staff deployment patterns in the context investigated are suboptimal and that, in consequence, individual libraries should be open to scrutiny in comparison with others not only in terms of their quantifiable patterns of library usage but also in terms of the patterns of their staff provision and staff deployment

    Human resourcing in academic libraries : the 'lady librarian', the call for flexible staff and the need to be counted

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    This paper reports on a recent set of research findings into human resource (HR) deployment in academic, college and national libraries in the UK and Ireland by selectively summarising these findings. The recommendations are that libraries should make available for comparison by others not only their library service provision, i.e. opening hours, but also staff provision, i.e. staffing numbers and demographics and staff deployment, with a view to benchmarking levels of flexibility. This work highlights the lack of existing benchmarking facilities in UK universities and colleges of higher education, relating to HR deployment in libraries, and recommends that Sconul extends the existing data collection in its Annual Statistical return to include this HR area

    Detection of solvents using a distributed fibre optic sensor

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    A fibre optic sensor that is capable of distributed detection of liquid solvents is presented. Sensor interrogation using optical time domain reflectometry (OTDR) provides the capability of locating solvent spills to a precision of ±2 m over a total sensor length that may extend to 20 km

    Spectroscopy of 50^{50}Sc and ab initio calculations of B(M3)B(M3) strengths

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    The GRIFFIN spectrometer at TRIUMF-ISAC has been used to study excited states and transitions in 50^{50}Sc following the β\beta-decay of 50^{50}Ca. Branching ratios were determined from the measured γ\gamma-ray intensities, and angular correlations of γ\gamma rays have been used to firmly assign the spins of excited states. The presence of an isomeric state that decays by an M3M3 transition with a B(M3)B(M3) strength of 13.6(7)\,W.u. has been confirmed. We compare with the first {\it ab initio} calculations of B(M3B(M3) strengths in light and medium-mass nuclei from the valence-space in-medium similarity renormalization group approach, using consistently derived effective Hamiltonians and M3M3 operator. The experimental data are well reproduced for isoscalar M3M3 transitions when using bare gg-factors, but the strength of isovector M3M3 transitions are found to be underestimated by an order of magnitude

    Unusual Symmetries in the Kugel-Khomskii Hamiltonian

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    The Kugel-Khomskii Hamiltonian for cubic titanates describes spin and orbital superexchange interactions between d1d^1 ions having three-fold degenerate t2gt_{2g} orbitals. Since orbitals do not couple along "inactive" axes, perpendicular to the orbital planes, the total number of electrons in ∣α>|\alpha > orbitals in any such plane and the corresponding total spin are both conserved. A Mermin-Wagner construction shows that there is no long-range spin ordering at nonzero temperatures. Inclusion of spin-orbit coupling allows such ordering, but even then the excitation spectrum is gapless due to a continuous symmetry. Thus, the observed order and gap require more symmetry breaking terms.Comment: 4 pages (two column format with 2 figures), to appear in Phys. Rev. Lett. (submitted on Dec. 2002

    Varying sediment sources (Hudson Strait, Cumberland Sound, Baffin Bay) to the NW Labrador Sea slope between and during Heinrich events 0 to 4

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    Core HU97048-007PC was recovered from the continental Labrador Sea slope at a water depth of 945m, 250km seaward from the mouth of Cumberland Sound, and 400km north of Hudson Strait. Cumberland Sound is a structural trough partly floored by Cretaceous mudstones and Paleozoic carbonates. The record extends from ~ 10 to 58k cal a BP. On-board logging revealed a complex series of lithofacies, including buff-colored detrital carbonate-rich sediments [Heinrich (H)-events] frequently bracketed by black facies. We investigate the provenance of these facies using quantitative X-ray diffraction on drill-core samples from Paleozoic and Cretaceous bedrock from the SE Baffin Island Shelf, and on the \u3c 2-mm sediment fraction in a transect of five cores from Cumberland Sound to the NW Labrador Sea. A sediment unmixing program was used to discriminate between sediment sources, which included dolomite-rich sediments from Baffin Bay, calcite-rich sediments from Hudson Strait and discrete sources from Cumberland Sound. Results indicated that the bulk of the sediment was derived from Cumberland Sound, but Baffin Bay contributed to sediments coeval with H-0 (Younger Dryas), whereas Hudson Strait was the source during H-events 1–4. Contributions from the Cretaceous outcrops within Cumberland Sound bracket H-events, thus both leading and lagging Hudson Strait-sourced H-events

    Varying sediment sources (Hudson Strait, Cumberland Sound, Baffin Bay) to the NW Labrador Sea slope between and during Heinrich events 0 to 4

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    Core HU97048-007PC was recovered from the continental Labrador Sea slope at a water depth of 945m, 250km seaward from the mouth of Cumberland Sound, and 400km north of Hudson Strait. Cumberland Sound is a structural trough partly floored by Cretaceous mudstones and Paleozoic carbonates. The record extends from ~ 10 to 58k cal a BP. On-board logging revealed a complex series of lithofacies, including buff-colored detrital carbonate-rich sediments [Heinrich (H)-events] frequently bracketed by black facies. We investigate the provenance of these facies using quantitative X-ray diffraction on drill-core samples from Paleozoic and Cretaceous bedrock from the SE Baffin Island Shelf, and on the \u3c 2-mm sediment fraction in a transect of five cores from Cumberland Sound to the NW Labrador Sea. A sediment unmixing program was used to discriminate between sediment sources, which included dolomite-rich sediments from Baffin Bay, calcite-rich sediments from Hudson Strait and discrete sources from Cumberland Sound. Results indicated that the bulk of the sediment was derived from Cumberland Sound, but Baffin Bay contributed to sediments coeval with H-0 (Younger Dryas), whereas Hudson Strait was the source during H-events 1–4. Contributions from the Cretaceous outcrops within Cumberland Sound bracket H-events, thus both leading and lagging Hudson Strait-sourced H-events

    Magnetic Order and Dynamics in an Orbitally Degenerate Ferromagnetic Insulator

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    Neutron scattering was used to determine the spin structure and the magnon spectrum of the Mott--Hubbard insulator YTiO3_3. The magnetic structure is complex, comprising substantial G-type and A-type antiferromagnetic components in addition to the predominant ferromagnetic component. The magnon spectrum, on the other hand, is gapless and nearly isotropic. We show that these findings are inconsistent with the orbitally ordered states thus far proposed for YTiO3_3 and discuss general implications for a theoretical description of exchange interactions in orbitally degenerate systems.Comment: to appear in Phys. Rev. Let
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