Infrastructure and technology constraints to agricultural development in the humid and subhumid tropics of Africa:

Green Revolution technologies have not been widely adopted in Africa. What are the chances that they will play a major role in the near future? This paper shows that the enabling infrastructure, especially rural roads and irrigation systems are not likely to be in place in the humid and sub-humid tropics of Africa in the next 20-30 years. Consequently a typology of the more appropriate set of technology that is input and infrastructure efficient, has high returns to seasonal labor and is sustainable is presented. Research institutions should be geared up now to produce them for use in 10-20 years.Green Revolution Africa., Infrastructure (Economics), Rural development Africa., Technological innovations., Irrigation., Africa.,

Estimating the cost-effectiveness of fluticasone propionate for treating chronic obstructive pulmonary disease in the presence of missing data

Objectives: To explore the cost-effectiveness of fluticasone propionate (FP) for the treatment of chronic obstructive pulmonary disease (COPD), we estimated costs and qualityadjusted life-years (QALYs) over 3 years, based on an economic appraisal of a previously reported clinical trial (Inhaled Steroids in Obstructive Lung Disease in Europe [ISOLDE]). Methods: Seven hundred forty-two patients enrolled in the ISOLDE trial who received either FP or placebo had data available on health-care costs and quality of life over the period of the study. The SF-36-based utility scores for quality of life were used to calculate QALYs. A combined imputation and bootstrapping procedure was employed to handle missing data and to estimate statistical uncertainty in the estimated cumulative costs and QALYs over the study period. The imputation approach was based on propensity scoring and nesting this approach within the bootstrap ensured that multiple imputations were performed such that statistical estimates included imputation uncertainty. Results: Complete data were available on mortality within the follow-up period of the study and a nonsignificant trend toward improved survival of 0.06 (95% confidence interval [CI] –0.01 to 0.15) life-years was observed. In an analysis based on a propensity scoring approach to missing data we estimated the incremental costs of FP versus placebo to be £1021 (95% CI £619–1338) with an additional effect of 0.11 QALYs (CI 0.04–0.20). Cost-effectiveness estimates for the within-trial period of £17,700 per life-year gained (£6900 to ∞) and £9500 per QALY gained (CI £4300–26,500) were generated that include uncertainty due to the imputation process. An alternative imputation approach did not materially affect these estimates. Conclusions: Previous analyses of the ISOLDE study showed significant improvement on disease-specific health status measures and a trend toward a survival advantage for treatment with FP. This analysis shows that joint considerations of quality of life and survival result in a substantial increase in QALYs favoring treatment with FP. Based on these data, the inhaled corticosteroid FP appears costeffective for the treatment of COPD. Confirmation or refutation of this result may be achieved once the Towards a Revolution in COPD Health (TORCH) study reports, a large randomized controlled trial powered to detect mortality changes associated with the use of FP alone, or in combination with salmeterol, which is also collecting resource use and utility data suitable for estimating cost-effectiveness

Borel circle squaring

We give a completely constructive solution to Tarski's circle squaring problem. More generally, we prove a Borel version of an equidecomposition theorem due to Laczkovich. If $k \geq 1$ and $A, B \subseteq \mathbb{R}^k$ are bounded Borel sets with the same positive Lebesgue measure whose boundaries have upper Minkowski dimension less than $k$, then $A$ and $B$ are equidecomposable by translations using Borel pieces. This answers a question of Wagon. Our proof uses ideas from the study of flows in graphs, and a recent result of Gao, Jackson, Krohne, and Seward on special types of witnesses to the hyperfiniteness of free Borel actions of $\mathbb{Z}^d$.Comment: Minor typos correcte

Oil Blending: Mixing and Contamination

The Shell Company of Australia has a frequent need to blend lubricants. Blending, sometimes involving three lubricant oils and additives, takes place by jet mixing in large tanks of typically 45,000 titres capacity. The jets are driven by pumps with typical volume throughput of up to 1,000 titres per minute, and typical blending times may be as long as one or two hours. The jet blending process was investigated in a number of ways at the Study Group. These included: simple estimates for blending times, theoretical and experimental description of jet behaviour, development of a simple compartment model for the blending process, and several large scale computer simulations of the jet-induced motion using a commercial Computational Fluid Dynamics package. In addition, the sedimentation of contaminant particles in the tanks was investigated. This overall investigation, using a variety of approaches, gave a good knowledge of the blending process

Safety shield for vacuum/pressure chamber viewing port

Observers are protected from flying debris resulting from a failure of a vacuum or pressure chamber viewing port following an implosion or explosion by an optically clear shatter resistant safety shield which spaced apart from the viewing port on the outer surface of the chamber

Argon: A thermometer of the upper atmosphere

The exospheric temperatures are derived from Ar, N2, O and He measurements obtained from the Aeros-1 NATE experiment. It is shown that the temperatures derived from Ar and N2 are very close to each other and show very similar seasonal, latitudinal and the day to night variations both under quiet and the geomagnetically disturbed conditions. The temperatures derived from O and He do not usually follow this pattern because of their large variabilities in the lower thermosphere. The differences in the inferred temperatures from these gases are particularly noticeable when the neutral composition data between 220-250 km are used. In this altitude region Ar appears to have some advantage over N2 for the purpose of deriving neutral temperature

The Global People landscaping study: intercultural effectiveness in global education partnerships

The Context The Higher Education sector in the UK is experiencing a period of rapid and competitive internationalisation. The market for higher education, at undergraduate and post graduate levels, is now truly global: many potential students can make choices about study destinations between an enormous range of institutions in any of the five continents. The audience for research is also global, with a proliferation of domestic and international journals, a multitude of international conferences in every discipline and widely disseminated international indices, ranking universities in terms of their publication and teaching performance. In particular, the recent growth of the major Asian economies has re-shaped the profile of many UK universities both in the composition of their student bodies and also in the number, nature and importance of their overseas partnerships. This Study It is within this context that the Global People project has been established, with the objective of providing knowledge and resources that will support those in the UK Higher Education sector who work, or wish to work, in international collaborations. Phases 1 and 2 of the eChina Programme (see Section1, Introduction) generated a great deal of learning about managing international education projects and Phase 3 of the Programme, the Global People project, was instigated with the aim of capturing this emergent knowledge for the benefit of others. This current report is a Landscaping Study that argues for the value of developing intercultural competence in order to better understand, create and manage productive and enjoyable partnerships with educational institutions outside the UK. Our arguments are supported by data from a wide range of research in disciplines as diverse as applied linguistics and international management. Key Findings a) The need for cultural awareness and sensitivity to diversity has been well established from studies in a range of disciplines. The high risks of mishandling intercultural interaction have prompted the development of a substantial literature both on perceived cultural differences and on the competencies that might be acquired to deal with this challenge. Although this concern has been driven by the financial requirements of international business, the internationalisation of Higher Education has imposed similar requirements on universities engaging in international collaboration. The challenge for academics and project managers is, within limited resources, to develop effective ways of identifying and acquiring the competencies needed to be interculturally effective. b) Interest in the cultural values of Chinese society has never been higher as global interaction with China, through business, government, education and science expands exponentially. There is a real danger in generalising about any nation’s cultural values and especially one where society and economy are changing so rapidly. However, the recent literature on China – from a number of disciplinary perspectives – argues that the influence of traditional Confucian values on Chinese behaviour is still strong. This means that values such as propriety, trustworthiness and the desire for harmony are still reflected in behaviour that is more relationship-based, restrained and consensual than may be normal in Western business relations. Working with Chinese partners will still be facilitated by an understanding of the centrality of social networks to Chinese private and public life and interaction in working teams will benefit from an appreciation of the Chinese respect for hierarchy and reluctance to pass judgement openly on colleagues. c) The majority of the work done on the impact of culture on e-learning has focused on issues of content and materials design. Too frequently this has been a concern for adaptation of existing materials for a local audience, rather than collaborative development of new materials by an intercultural team. As a consequence, there is limited insight into the complexities of designing and delivering learning programmes in different cultural contexts. What the research does show is that learning styles and preferences can vary between cultures and that this is related to the varying pedagogies dominant in particular national cultures. Understanding the implications of this diversity of pedagogies and reconciling cultural differences remain substantial challenges for those adapting or designing online learning programmes across a variety of cultures. d) Research into the performance of international teams offers many insights into good management practice. Principles of team selection, development, leadership and collaboration are well-established in the literature on global management and multinational partnerships. These principles recognise the importance of organisational culture, occupational culture and team roles as additional dimensions to that of national culture in influencing behaviour in project groups. International collaborations are viewed as complex dynamic systems which move through a life cycle, with valuable opportunities for reflection, learning and performance improvement. The implementation of transparent, and mutually agreed, norms, procedures and objectives is regarded as crucial to effective collaboration. e) At the level of the individual, an extensive literature exists on the competencies required to be effective in intercultural interaction. There is an apparently high degree of consensus on the core competencies that should be acquired by the culturally effective individual. Chief among these are self-awareness, cultural knowledge, language proficiency, openness, flexibility and communication skills. However, in many cases there is, at best, limited data to support the theories put forward. There is also a lack of clarity in the use of terminology, with no guarantee that researchers are using terms in the same way. The more detailed, applied research has succeeded in teasing out the knowledge and skills that may be critical in successful interaction by further breaking down broad competencies (e.g. ‘openness’) into more detailed behaviours (‘openness to new thinking; positive acceptance of different behaviour). A Way Forward A major obstacle to accessing and utilising the current knowledge and guidance on intercultural effectiveness is its dispersion across a large number of disciplines and the consequent disparity of the conceptual models and terminology employed. A framework for understanding intercultural effectiveness in international projects has a very high potential value to a wide range of professionals engaged in cross-cultural collaboration. There is substantial learning to be gained from the insights of different research disciplines but these insights need to be brought together in a way that practitioners from any field can access them without specialist knowledge. These ambitions have materialised in the form of the Toolbook, which is specifically designed to be used as a self-explanatory guide, complete with tools to stimulate awareness-raising and to encourage reflection on available resources and current practices