DISCUSSION

This article appeared in the Discussion Section. Gilly Salmon's reply to the criticisms of the five-stage model for e-learning

Flying not flapping: a strategic framework for e‐learning and pedagogical innovation in higher education institutions

E‐learning is in a rather extraordinary position. It was born as a ‘tool’ and now finds itself in the guise of a somewhat wobbly arrow of change. In practice, changing the way thousands of teachers teach, learners learn, innovation is promoted and sustainable change in traditional institutions is achieved across hundreds of different disciplines is a demanding endeavour that will not be achieved by learning technologies alone. It involves art, craft and science as well as technology. This paper attempts to show how it might be possible to capture and model complex strategic processes that will help move the potential of e‐learning in universities to a new stage of development. It offers the example of a four‐quadrant model created as a framework for an e‐learning strategy

Structure and restructuring in the Spanish economy

Accompanying report for submission in partial fulfllment of the requirements for the award of the Degree of Doctor of Philosophy based on published works to the Faculty of Science and Technology, University of Luton.The changing character of the economic environment in the last quarter of the twentieth century has resulted in a continuous process of restructuring in the economy of Spain, mediated through the structure and regulatory framework of the economy. Three specific themes contributing to restructuring are addressed: globalisation of the economy, European integration, and the role of the public sector. Globalisation ofthe economy is demonstrated through increased international flows of goods, capital, people and information, and by the incorporation of businesses in Spain within the corporate networks of foreign multinational companies. Spanish businesses too have been extending their global reach, especially into Latin America. European integration has been part of the globalisation process. A substantial proportion of international flows are now concentrated within the European Union and business networks have been adapting to the 'Single European Market'. European integration has dominated economic policy, first in measures to secure membership of the European Economic Community, then in measures to adjust to the regulatory environment of the European Community and finally in the race to achieve the Maastricht criteria. The role of the public sector in restructuring has been to 'manage' the market forces unleashed by the liberalisation ofthe economy. Market forces, embracing increased competition and technological change, have driven the restructuring process demanding responses from the government. These responses have increasingly been constrained by the shedding of responsibilities upwards to international organisations and downwards to lower tiers of administration. Isolation, protection and goverrunent intervention in the economy have given way to a more liberal, open and international environment. Transformation in the mode of regulation from state corporatism to neo-liberalism has been accompanied by globalisation of the economy, particularly integration into the European economy and the corporate space of multinational companies. Nevertheless, despite the growing emphasis on globalisation, public policy continues to play a crucial role influencing the pace, if not the direction, of restructuring

Daring to Share: Multi-Denominational Congregations in the United States and Canada

Daring to Share: Multi-Denominational Congregations in the United States and Canada, by Sandra Beardsall, Mitzi J Budde, and William P McDonald. Eugene: Wipf and Stock Publishers, 2018.978153263915

Generalized explicit descent and its application to curves of genus 3

We introduce a common generalization of essentially all known methods for explicit computation of Selmer groups, which are used to bound the ranks of abelian varieties over global fields. We also simplify and extend the proofs relating what is computed to the cohomologically-defined Selmer groups. Selmer group computations have been practical for many Jacobians of curves over Q of genus up to 2 since the 1990s, but our approach is the first to be practical for general curves of genus 3. We show that our approach succeeds on some genus-3 examples defined by polynomials with small coefficients.Comment: 58 pages; added a few references, and updated a few other

Decentralization as an incentive scheme when regional differences are large

It has been suggested that large regional differences could be an obstacle to that part of the political accountability of office-holders which is based on yardstick competition among governments. The paper addresses that question and concludes that the obstacle is not too serious in general. The second part of the paper is devoted to the persistent economic underperformance of some regions in countries such as Germany, Italy and (with regard to regions overseas) France. How is it that the mechanism of yardstick competition induces a convergence of economic performance among European Union member countries, even those particularly poor initially, but fails to induce all the underperforming regions of these countries to catch up? A small model is used to explore that question. In the case of the persistently underperforming regions, it turns out that the degree of regional differentiation is not sufficient for yardstick competition to work and bring about an improvement in performance. The yardstick competition framework remains useful if it helps to understand more clearly why this is so.yardstick competition;political competition;regional development

Don’t tell us: the demand for secretive behaviour

The matter studied here is how, and with what implications, people may decide that they do not want to be let into secrets that concern them. They could get the information at no cost but they refuse to know. The reasoning is framed in terms of principals and agents, with the principals assumed not to want to know the agents’ secrets. For convenience, the context chosen for the exposition is mainly that of voters as principals and the government or the office-holders as agents. After some exploration of the motivations underlying the attitude of the principals, the paper focuses on the case when neither total secrecy nor total disclosure prevails. The demand for partial secrecy is analysed with the help of two models, one devoted to ongoing processes and the other to past events. Finally the paper discusses some of the ways the “don’t tell us mechanism” may interact with two others: “thinking about something else” and “low issue salience”.secrets, transparency, asymmetric information, voluntary ignorance, voting

The Concorde and aeronautical research

Theoretical and experimental work carried out in various research centers, and particularly at ONERA, which led to the conception and to the main technical solutions included in the design of Concorde: plane form, twist and camber of the wing, lift augmentation by upper surface vortices, kinetic heating, air intakes and jet exhausts, materials, aeroelasticity. The development of research, and the numerous tests carried out for the benefit of the designers since the beginning of the project, are also outlined

Sharp Oracle Inequalities for Aggregation of Affine Estimators

We consider the problem of combining a (possibly uncountably infinite) set of affine estimators in non-parametric regression model with heteroscedastic Gaussian noise. Focusing on the exponentially weighted aggregate, we prove a PAC-Bayesian type inequality that leads to sharp oracle inequalities in discrete but also in continuous settings. The framework is general enough to cover the combinations of various procedures such as least square regression, kernel ridge regression, shrinking estimators and many other estimators used in the literature on statistical inverse problems. As a consequence, we show that the proposed aggregate provides an adaptive estimator in the exact minimax sense without neither discretizing the range of tuning parameters nor splitting the set of observations. We also illustrate numerically the good performance achieved by the exponentially weighted aggregate