3,852 research outputs found
Freedom, family, hope and rewards? Points of departure for development studies research on direct selling
Patient safety indicators for England from hospital administrative data: case-control analysis and comparison with US data
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.The Healthcare Commission received a small grant from the Health and Social Care Information Centre to support the initial recoding work
Rash impulsiveness and negative mood, but not alexithymia or reward sensitivity, differentiate young to middle-aged chronic daily smokers from never-smokers
Influence of PWM on the proximity loss in permanent magnet brushless AC machines
The winding copper loss can be significantly increased due to skin and proximity eddy current effects. The skin and proximity losses due to fundamental frequency current has been investigated in literature, but the influence of PWM on the skin and proximity losses has not been reported. In this paper, 2-D finite element method is employed to analyze the skin and proximity losses in a permanent magnet brushless AC machine, in which significant proximity loss exists due to high frequency current ripples induced by the PWM, as confirmed by both theoretical calculation and experiment. The analyses should be generally applicable to other machines
PILOT RANDOMISED CONTROLLED TRIAL OF A 7-WEEK DISEASE-SPECIFIC SELF-MANAGEMENT PROGRAMME FOR PATIENTS WITH COPD: BELLA (BETTER LIVING WITH LONG TERM AIRWAYS DISEASE STUDY)
Bringing reality to the classroom: Exercises in intertextuality
The ability to handle intertextual relations in email is an important component of workplace writing competence that is, for the most part, overlooked in business English classes because of a tendency to treat emails in classroom contexts as independent texts. This study reports on a series of email assignments that required students to read and process a collection of texts before composing emails themselves, with the aim of examining how students dealt with the demands made by the intertextual nature of workplace writing. The findings suggest that the management of multiple texts and their intertextual relations poses considerable challenges for student writers, specifically relating to the amount of information to include, the degree of explicitness needed in referring to other texts, and the management of the dialogue and writer-reader relationship. The study concludes that there is a need to demonstrate to students the centrality of intertextuality and the ways in which it contributes to the coherence of workplace communication. Students need to understand, too, that managing intertextuality is not simply a question of textual manipulation, but of understanding the communicative context and of considering how they want their relationship with the reader to develop
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Reintroducing San Joaquin kit fox (Vulpes macrotis mutica) to vacant or restored lands: identifying optimal source populations and candidate foxes
Endangered San Joaquin kit foxes (Vulpes macrotis mutica) currently persist as a meta- population in central California consisting of 3 core and several satellite populations. Many of these populations are small and the meta-population is highly fragmented, which increases extinction risk. Translocation is a potential strategy for increasing the number of populations. Various factors would need to be considered when selecting source populations and candidate foxes for translocation. One such factor is behavioral attributes of individual foxes, as reflected by level of boldness, particularly in response to novel resources and potential threats. We compared behavioral attributes between and within populations of kit foxes in urban and non-urban habitats, and also examined the relationship of these attributes to survival and fitness. The overall goal of this project was to identify optimal source populations and individual foxes for relocation efforts, and in particular to determine whether urban foxes could be used in such efforts
Vaccinations, infections and antibacterials in the first grass pollen season of life and risk of later hayfever
Published source: Bremner, S. A., Carey, I. M., DeWilde, S., Richards, N., Maier, W. C., Hilton, S. R., Strachan, D. P. and Cook, D. G. (2007), Vaccinations, infections and antibacterials in the first grass pollen season of life and risk of later hayfever. Clinical & Experimental Allergy, 37: 512–517. doi: 10.1111/j.1365-2222.2007.02697.
Commuting Quantum Circuits with Few Outputs are Unlikely to be Classically Simulatable
We study the classical simulatability of commuting quantum circuits with n
input qubits and O(log n) output qubits, where a quantum circuit is classically
simulatable if its output probability distribution can be sampled up to an
exponentially small additive error in classical polynomial time. First, we show
that there exists a commuting quantum circuit that is not classically
simulatable unless the polynomial hierarchy collapses to the third level. This
is the first formal evidence that a commuting quantum circuit is not
classically simulatable even when the number of output qubits is exponentially
small. Then, we consider a generalized version of the circuit and clarify the
condition under which it is classically simulatable. Lastly, we apply the
argument for the above evidence to Clifford circuits in a similar setting and
provide evidence that such a circuit augmented by a depth-1 non-Clifford layer
is not classically simulatable. These results reveal subtle differences between
quantum and classical computation.Comment: 19 pages, 6 figures; v2: Theorems 1 and 3 improved, proofs modifie
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