Addressing the Bard: Learning Ideas

The Scottish Poetry Library has published a new, provocative and exciting anthology of Burns poems, launched in the Year of Homecoming and of Burns’s 250th anniversary. What makes this anthology different is that twelve contemporary poets have been asked to select one of Burns’s poems and to respond to it. The result is an eclectic collection with some unexpected choices and responses that enlighten, challenge and amuse us. All of the response poems provide insight into Burns’s original work and some may have a more direct resonance with modern readers. In addition to the book itself, these supporting resources are being provided on the Learning and Teaching Scotland website. The material has been developed by Liz Niven, poet, writer, and Scots-language educator, and Maureen Farrell, an English teacher and now teacher educator from the University of Glasgow

Providing the family-nurse partnership programme through interpreters in England

This study looks at the delivery of the Family-Nurse Partnership (FNP) in England with interpreters. This home-visiting programme for vulnerable, young first-time mothers is known in the USA as the Nurse-Family Partnership (NFP). FNP is manualised with a number of fidelity targets and stretch objectives. This study covers the first two phases, pregnancy and infancy (up to 12 months). The programme relies on the development of a close nurse-client relationship. Interpreters can be a barrier for therapeutic work with vulnerable groups. The aims are to determine from quantitative and qualitative data whether the FNP programme can be delivered with fidelity in the presence of an interpreter and to explore issues concerned with the impact of interpreters on relationships. Statistical comparisons were made of delivery objectives over 2 years, from April 2007 to February 2009, in the 10 sites in England, spread across all nine Government Office Regions providing FNP. Forty-three clients had an interpreter at some point and 1261 did not. Qualitative interviews were conducted between April and May 2009 with 30 stakeholders (nurses, clients, interpreters). In relation to quantitative indicators, the percentage of planned content covered in visits was lower with interpreters (pregnancy 90% vs. 94%; infancy 88% vs. 93%) and both understanding and involvement of clients, as judged by nurses on 5-point scales, were lower (understanding, pregnancy 4.3 vs. 4.6, infancy 3.8 vs. 4.5; involvement, pregnancy 4.4 vs. 4.7, infancy 3.7 vs. 4.5). The interpreter was not thought by nurses to impede the development of a collaborative client-nurse relationship unless the interpreter and client became too close, but some nurses and clients reported that they would rather manage without an interpreter. Some stress was noted for nurses delivering the programme with an interpreter. More research is needed to determine the extent to which interpreters accurately convey the programme's strength-based approach

Jaynes' MaxEnt, Steady State Flow Systems and the Maximum Entropy Production Principle

Jaynes' maximum entropy (MaxEnt) principle was recently used to give a conditional, local derivation of the ``maximum entropy production'' (MEP) principle, which states that a flow system with fixed flow(s) or gradient(s) will converge to a steady state of maximum production of thermodynamic entropy (R.K. Niven, Phys. Rev. E, in press). The analysis provides a steady state analog of the MaxEnt formulation of equilibrium thermodynamics, applicable to many complex flow systems at steady state. The present study examines the classification of physical systems, with emphasis on the choice of constraints in MaxEnt. The discussion clarifies the distinction between equilibrium, fluid flow, source/sink, flow/reactive and other systems, leading into an appraisal of the application of MaxEnt to steady state flow and reactive systems.Comment: 6 pages; paper for MaxEnt0

Kinematics nomenclature for physiological accelerations with special reference to vestibular applications

Kinematics nomenclature for physiological accelerations and special reference to vestibular apparatu

Elicitation of horizontal nystagmus by periodic linear acceleration

Horizontal nystagmus elicitation in man by periodic linear acceleratio

Effect of blade geometry on the aerodynamic loads produced by vertical-axis wind turbines

Accurate aerodynamic modelling of vertical-axis wind turbines poses a significant challenge. The rotation of the turbine induces large variations in the angle of attack of its blades that can manifest as dynamic stall. In addition, interactions between the blades of the turbine and the wake that they produce can result in impulsive changes to the aerodynamic loading. The Vorticity Transport Model has been used to simulate the aerodynamic performance and wake dynamics of three different vertical-axis wind turbine configurations. It is known that vertical-axis turbines with either straight or curved blades deliver torque to their shaft that fluctuates at the blade passage frequency of the rotor. In contrast, a turbine with helically twisted blades delivers a relatively steady torque to the shaft. In this article, the interactions between helically twisted blades and the vortices within their wake are shown to result in localized perturbations to the aerodynamic loading on the rotor that can disrupt the otherwise relatively smooth power output that is predicted by simplistic aerodynamic tools that do not model the wake to sufficient fidelity. Furthermore, vertical-axis wind turbines with curved blades are shown to be somewhat more susceptible to local dynamic stall than turbines with straight blades

Recurrent proofs of the irrationality of certain trigonometric values

We use recurrences of integrals to give new and elementary proofs of the irrationality of pi, tan(r) for all nonzero rational r, and cos(r) for all nonzero rational r^2. Immediate consequences to other values of the elementary transcendental functions are also discussed

Monensin-dependent and -independent mechanisms of cell-matrix adhesion

AbstractAttachment and spreading of human FL cells on a subcellular matrix (SCM) preparation made by treating confluent cell monolayers with deoxycholate are insensitive to the presence of monensin. However, if the cell suspension is surface-iodinated prior to adhesion using the LPO/H2O2 system, cell spreading on SCM is inhibited by 1 μM monensin. The suggested interpretation is that cell surface components required for cell spreading on SCM are inactivated by iodination and need replacement from intracellular reserves by a monensin-sensitive pathway. This pathway is not required in the absence of iodination when sufficient surface components (or a monensin-independent pathway of surface expression) are available. Support for this interpretation is obtained by means of double-iodination experiments in which surface-labelled cells adhere and spread, are detached and labelled a second time and then allowed to adhere again to SCM. Cell spreading in the second case is inhibited by ~ 80%, suggesting that both previously expressed and newly recruited receptors are inactivated

On Local Equivalence, Surface Code States and Matroids

Recently, Ji et al disproved the LU-LC conjecture and showed that the local unitary and local Clifford equivalence classes of the stabilizer states are not always the same. Despite the fact this settles the LU-LC conjecture, a sufficient condition for stabilizer states that violate the LU-LC conjecture is missing. In this paper, we investigate further the properties of stabilizer states with respect to local equivalence. Our first result shows that there exist infinitely many stabilizer states which violate the LU-LC conjecture. In particular, we show that for all numbers of qubits $n\geq 28$, there exist distance two stabilizer states which are counterexamples to the LU-LC conjecture. We prove that for all odd $n\geq 195$, there exist stabilizer states with distance greater than two which are LU equivalent but not LC equivalent. Two important classes of stabilizer states that are of great interest in quantum computation are the cluster states and stabilizer states of the surface codes. To date, the status of these states with respect to the LU-LC conjecture was not studied. We show that, under some minimal restrictions, both these classes of states preclude any counterexamples. In this context, we also show that the associated surface codes do not have any encoded non-Clifford transversal gates. We characterize the CSS surface code states in terms of a class of minor closed binary matroids. In addition to making connection with an important open problem in binary matroid theory, this characterization does in some cases provide an efficient test for CSS states that are not counterexamples.Comment: LaTeX, 13 pages; Revised introduction, minor changes and corrections mainly in section V

Maximum-Entropy Weighting of Multi-Component Earth Climate Models

A maximum entropy-based framework is presented for the synthesis of projections from multiple Earth climate models. This identifies the most representative (most probable) model from a set of climate models -- as defined by specified constraints -- eliminating the need to calculate the entire set. Two approaches are developed, based on individual climate models or ensembles of models, subject to a single cost (energy) constraint or competing cost-benefit constraints. A finite-time limit on the minimum cost of modifying a model synthesis framework, at finite rates of change, is also reported.Comment: Inspired by discussions at the Mathematical and Statistical Approaches to Climate Modelling and Prediction workshop, Isaac Newton Institute for Mathematical Sciences, Cambridge, UK, 11 Aug. to 22 Dec. 2010. Accepted for publication in Climate Dynamics, 8 August 201