16 resultados para Global Change and the Hydrological Cycle
em Aston University Research Archive
Resumo:
The soil-plant-moisture subsystem is an important component of the hydrological cycle. Over the last 20 or so years a number of computer models of varying complexity have represented this subsystem with differing degrees of success. The aim of this present work has been to improve and extend an existing model. The new model is less site specific thus allowing for the simulation of a wide range of soil types and profiles. Several processes, not included in the original model, are simulated by the inclusion of new algorithms, including: macropore flow; hysteresis and plant growth. Changes have also been made to the infiltration, water uptake and water flow algorithms. Using field data from various sources, regression equations have been derived which relate parameters in the suction-conductivity-moisture content relationships to easily measured soil properties such as particle-size distribution data. Independent tests have been performed on laboratory data produced by Hedges (1989). The parameters found by regression for the suction relationships were then used in equations describing the infiltration and macropore processes. An extensive literature review produced a new model for calculating plant growth from actual transpiration, which was itself partly determined by the root densities and leaf area indices derived by the plant growth model. The new infiltration model uses intensity/duration curves to disaggregate daily rainfall inputs into hourly amounts. The final model has been calibrated and tested against field data, and its performance compared to that of the original model. Simulations have also been carried out to investigate the effects of various parameters on infiltration, macropore flow, actual transpiration and plant growth. Qualitatively comparisons have been made between these results and data given in the literature.
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The world food crisis, Britain's reliance on imported food and feedstuffs and balance of payments difficulties were some of the factors which lent weight to the call for increased self-sufficiency in Britain's agriculture in the 1970s. This project considers two main areas: an investigation of the impact of radical agricultural change, designed to increase self-sufficiency, on the balance of payments; and, an appraisal of the potential role of the food industry within a radically different food system. The study proceeded by: an examination of the principles of agricultural policy and its development in Britain; an overview of the mechanism and meaning of the balance of payments; a consideration of the debate on agricultural import saving; the construction of radical agricultural strategies; the estimation of effects of the strategies, particularly to the balance of. payments; the role of the food industry and possible innovations within the strategies; a case study of textured vegetable proteins; and, the wider implications of implementation of radical agricultural alternatives. Two strategies were considered: a vegan system, involving no livestock; and, an intermediate system, including some livestock and dairy cattle. The study concludes that although agricultural change could in principle make a contribution to the balance of payments, implementation of agricultural change cannot be justified for this purpose alone. First, balance of payments problems can be solved by more appropriate methods. Second, the UK' s balance of payments problem has disappeared for the time being owing to North Sea oil and economic recession. Third, the political and social consequences of the changes investigated would be unacceptable. Progress in UK food policy is likely to be in the form of an integrated food and health policy.
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By contrast to major constitutional reforms elsewhere in the UK, in England's eight regions beyond London New Labour has favoured administrative decentralisation. This paper examines these institutional arrangements and assesses their capacity to develop a more integrated approach to territorial development. It confirms a growing awareness of the need to ensure greater coherence between policies to promote economic, social and environmental wellbeing. Nonetheless, a complex regional institutional architecture, inconsistent sector-based strategies, a lack of strategic leadership and blurred accountabilities hamper moves towards policy integration and the delivery of joint outcomes. Moreover, despite ongoing reforms, the absence of a clear regional agenda in a functionally designed Whitehall raises fundamental questions about the ability of sub-national bodies to work collectively to develop and implement a more coherent approach to regional policy.
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This paper ends with a brief discussion of climate change and suggests that a practical solution would be to transfer much of the current air, sea and long-haul trucking of intercontinental freight between China and Europe (and the USA) to maglev systems. First we review the potential of Asian knowledge management and organisational learning and contrast this against Western precepts finding that there seems to be little incentive to 'look after one's fellows' in China (and perhaps across Asia) outside of tight personal guanxi networks. This is likely to be the case in the intense production regions of China where little time is allowed for 'organisational learning' by the staff and there is little incentive to initiate 'knowledge management' by senior managers. Thus the 'tragedy of the commons' will be enacted by individuals, township, and provincial leaders upwards to top ministers - no one will care for the climate or pollution, only for their own group and their wealth creation prospects. Copyright © 2011 Inderscience Enterprises Ltd.
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This research examines the role of the information management process within a process-oriented enterprise, Xerox Ltd. The research approach is based on a post-positive paradigm and has resulted in thirty-five idiographic statements. The three major outcomes are: 1. The process-oriented holistic enterprise is an organisation that requires a long-term management commitment to its development. It depends on the careful management of people, tasks, information and technology. A complex integration of business processes is required and this can be managed through the use of consistent documentation techniques, clarity in the definition of process responsibilities and management attention to the global metrics and the centralisation of the management of the process model are critical to its success. 2. The role of the information management process within the context of a process-oriented enterprise is to provide flexible and cost-effective applications, technological, and process support to the business. This is best achieved through a centralisation of the management of information management and of the process model. A business-led approach combined with the consolidation of applications, information, process, and data architectures is central to providing effective business and process-focused support. 3. In a process oriented holistic enterprise, process and information management are inextricably linked. The model of process management depends heavily on information management, whilst the model of information management is totally focused around supporting and creating the process model. The two models are mutually creating - one cannot exist without the other. There is a duality concept of process and information management.
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Firmly situating South African teams, players, and associations in the international framework in which they have to compete, South Africa and the Global Game: Football, Apartheid, and Beyond presents an interdisciplinary analysis of how and why South Africa underwent a remarkable transformation from a pariah in world sport to the first African host of a World Cup in 2010. Written by an eminent team of scholars, this special issue and book aims to examine the importance of football in South African society, revealing how the black oppression transformed a colonial game into a force for political, cultural and social liberation. It explores how the hosting of the 2010 World Cup aims to enhance the prestige of the post-apartheid nation, to generate economic growth and stimulate Pan-African pride. Among the themes dealt with are race and racism, class and gender dynamics, social identities, mass media and culture, and globalization. This collection of original and insightful essays will appeal to specialists in African Studies, Cultural Studies, and Sport Studies, as well as to non-specialist readers seeking to inform themselves ahead of the 2010 World Cup. This book was published as a special issue of Soccer and Society. 1. Introduction Peter Alegi and Chris Bolsmann Part 1: Past is Prologue – History of Football in South Africa 2. Football as Code: The Social Diffusion of ‘Soccer’ in South Africa Lloyd Hill 3. White Football in South Africa: Empire, Apartheid and Change, 1892 – 1977 Chris Bolsmann 4. A Biography of Darius Dhlomo: Transnational Footballer in the Era of Apartheid Peter Alegi 5. Women and Gender in South African Soccer Cynthia Fabrizio Pelak Part 2: Football Culture after Apartheid: Local and Transnational Dynamics 6. "You Must Support Chiefs: Pirates Already Have Two White Fans!" Race and Racial Discourse in South African Football Fandom Marc Fletcher 7. "It wasn’t that I did not like South African Football": Media, History, and Biography Sean Jacobs 8. Soccer in a Rugby Town: Restructuring Football in Stellenbosch Sylvain Cubizolles 9. Differing Trajectories: Football Development and Patterns of Player Migration in South Africa and Ghana Paul Darby and Eirik Solberg Part 3: The 2010 World Cup: Challenges and Opportunities 10. Football's Tsars: Proprietorship, Corporatism and Politics in the 2010 FIFA World Cup Scarlett Cornelissen 11. Sports as Cultural Diplomacy: The 2010 FIFA World Cup in South Africa’s Foreign Policy Sifiso Mxolisi Ndlovu 12. World Cup 2010: Africa’s Turn or the Turn on Africa? Ashwin Desai and Goolam Vahed 13. The 2010 FIFA World Cup: Critical Voices From Below Percy Ngonyama.
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The purpose of this article is to delimit the role of pragmatic specialization in the evolution of negation in French. The change in the marking of sentential negation is believed to proceed in characterized stages that would together constitute the Jespersen cycle. As a marker becomes the default expression of negation, the other markers do not necessarily fade away, and are maintained with specialized roles that include pragmatic functions. One such pragmatic function is that of activation (Dryer 1996), by which a proposition is presented as accessible to the hearer. Activation is shown to motivate the use of preverbal non that competes with 'ne' for several centuries. The claims that the emergence of postverbal pas in early French and the loss of 'ne' in contemporary spoken French are associated with activation are considered on the basis of novel data. It is concluded that pragmatic functions contribute to language change by providing marked options that may be conferred the default status in a grammatical paradigm.
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Structural change brought about by the end of the Cold War and accelerated globalisation have transformed the global environment. A global governance complex is emerging, characterised by an ever-greater functional and regulatory role for multilateral organisations such as the United Nations (UN) and its associated agencies. The evolving global governance framework has created opportunities for regional organisations to participate as actors within the UN (and other multilateral institutions). This article compares the European Union (EU) and Association of Southeast Asian Nations (ASEAN) as actors within the UN network. It begins by extrapolating framework conditions for the emergence of EU and ASEAN actorness from the literature. The core argument of this article is that EU and ASEAN actorness is evolving in two succinct stages: Changes in the global environment create opportunities for the participation of regional organisations in global governance institutions, exposing representation and cohesion problems at the regional level. In response, ASEAN and the EU have initiated processes of institutional adaptation.
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This paper investigates the role of absorptive capacity in the diffusion of global technology with sector and firm heterogeneity. We construct the FDI-intensity weighted global R&D stock for each industry and link it to Chinese firm-level panel data relating to 53,981 firms over the period 2001-2005. Non-parametric frontier analysis is employed to explore how absorptive capacity affects technical change and catch-up in the presence of global knowledge spillovers. We find that R&D activities and training at individual firms serve as an effective source of absorptive capability. The contribution of absorptive capacity varies according to the type of FDI and the extent of openness.
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This special issue brings together a variety of articles, each one enriching understanding about whether and how human resource management (HRM) influences organizational performance (however defined) against a backdrop of complex change. We present a preliminary framework that enables us to integrate the diverse themes explored in the special issue, proposing a mediating role for organizational change capacity (OCC). OCC represents a particular subset within the resource-based literature labeled as “dynamic capabilities.” Although not well researched, there is evidence that OCC is positively associated with firm performance and that this relationship is stronger given conditions of high uncertainty. Our framework reflects on external and internal parameters, which we suggest moderate the relationship between human resource management (HRM), OCC, and organizational performance. Our intention is to provide compelling insight for both practitioners and researchers, especially those whose remit extends beyond national boundaries, with reference to areas of the globe as disparate as Greece, Ireland, Pakistan, Switzerland, and the United Kingdom. © 2012 Wiley Periodicals, Inc.