A consistency framework for dynamic reconfiguration in AO-middleware architectures

Aspect-oriented (AO) middleware is a promising technology for the realisation of dynamic reconfiguration in distributed systems. Similar to other dynamic reconfiguration approaches, AO-middleware based reconfiguration requires that the consistency of the system is maintained across reconfigurations. AO middleware based reconfiguration is an ongoing research topic and several consistency approaches have been proposed. However, most of these approaches tend to be targeted at specific narrow contexts, whereas for heterogeneous distributed systems it is crucial to cover a wide range of operating conditions. In this paper we address this problem by exploring a flexible, framework-based consistency management approach that cover a wide range of operating conditions ensuring distributed dynamic reconfiguration in a consistent manner for AO-middleware architectures

Parsimonious numerical modelling of deep geothermal reservoirs

Numerical modelling has been undertaken to help improve understanding of a deep geothermal system being considered for development in the vicinity of Eastgate (Weardale, County Durham, UK). A parsimonious numerical modelling approach is used, which allows the possibility to develop a workable formal framework, rigorously testing evolving concepts against data as they become available. The approach used and results presented in this study are valuable as a contribution to a wider understanding of deep geothermal systems. This modelling approach is novel in that it utilises the mass transport code MT3DMS as a surrogate representation for heat transport in mid-enthalpy geothermal systems. A three-dimensional heat transport model was built, based on a relatively simple conceptual model. Results of simulation runs of a geothermal production scenario have positive implications for a working geothermal system at Eastgate. The Eastgate Geothermal Field has significant exploitation potential for combined heat and power purposes; it is anticipated that this site could support several tens of megawatts of heat production for direct use and many megawatts of electrical power using a binary power plant

AO-OpenCom: an AO-Middleware architecture supporting flexible dynamic reconfiguration

Middleware has emerged as a key technology in the construction of distributed systems. As a consequence, middleware is increasingly required to be highly modular and configurable, to support separation of concerns between services, and, crucially, to support dynamic reconfiguration: i.e. to be capable of being changed while running. Aspect-oriented middleware is a promising technology for the realisation of distributed reconfiguration in distributed systems. In this paper we propose an aspect-oriented middleware platform called AO-OpenCom that builds AO-based reconfiguration on top of a dynamic component approach to middleware system composition. The goal is to support extremely flexible dynamic reconfiguration that can be applied at all levels of the system and uniformly across the distributed environment. We evaluate our platform by the capability in meeting flexible reconfiguration and the impact of these overheads

Does it work? evaluating a new pay system

This report focuses on the evaluation of the impact of new pay systems in large, unionised multi-site organisations by the organisations themselves. Evaluation of the effectiveness of a pay system, however, does not take place in a vacuum and relates to the aims and objectives of the pay system concerned. Moreover, evaluation is not an end in itself. It is, therefore, relevant to consider if any further steps were taken as a result of evaluation. Accordingly our research questions were: • What were the aims and objectives of organisations when introducing new pay arrangements? • What data did organisations collect and review to inform their evaluation? • What steps have organisations taken as a result of their evaluation? We re-appraised our data from 10 NHS trusts in England which had introduced some innovations in pay and grading in the 1990s. Additionally, we looked at seven multi-site unionised organisations outside the NHS in both the public and private sectors, which had recently made changes to their reward systems, carrying out interviews and inspecting documents. The main output is a template for the evaluation of Agenda for Change by NHS organisations

Introduction: Peasants, Pastoralists and Proletarians: Joining the Debates on Trajectories of Agrarian Change, Livelihoods and Land Use

Recent changes in the agrarian studies and geography literatures present differing views on the pace and trajectory of change in rural developing areas. In this special section of Human Geography, we contrast the theoretical and practice implications of these differing approaches, namely depeasantization, accumulation by dispossession and deproletarianization. Depeasantization refers to change in livelihood activities out of agriculture, long theorized as necessary for an area’s transition into capitalism. Accumulation by dispossession is a process of on-going capital accumulation where a give resource is privatized, seized, or in some other manner alienated from common ownership in order to provide a basis for continued capital accumulation. Deproletarianization occurs when workers are no longer able to freely commodify and recommodify their only commodity, their own labour. In this section, we explore these three theses with case studies that draw upon empirical data. The papers in this collection all speak to one aspect or another of these debates. We do not intend to try to determine a “best approach”, rather we explore strengths and weaknesses of each argument. The production of nature, change in the mode of production and the political economy of nature are discussed in the first article by Brent McCusker. Phil O’Keefe and Geoff O’Brien examine the evolution of worked landscape under pre-capitalist modes of production in riverine ecologies. Through further case studies, Paul O’Keefe explores links between livelihoods and climate change in Mt. Kilimanjaro, Tanzania, while Franklin Graham explores the persistence of pastoralism in the Sahel. Finally, Naomi Shanguhyia and Brent McCusker examine the process of governance in dry land Kenya through the study of chronic food shortages

Emerging technologies for learning (volume 1)

Collection of 5 articles on emerging technologies and trend

Striking a balance between culture and fun: 'Quality' meets hitman genre in 'In Bruges'

This is an Author's Accepted Manuscript of an article published in New Review of Film and Television Studies, 9(2), 132 - 151, 2011, copyright Taylor & Francis, available online at: http://www.tandfonline.com/10.1080/17400309.2011.556934.This paper gives an analysis of In Bruges (2008) that situates the film as a hybrid product offering a mixture of signifiers of cinematic ‘quality’ and ‘lower’ genre ingredients. This paper also considers the extent to which In Bruges offers a combination of tonal registers in which irony and detachment, as markers of distinction, are blended with a more mainstream-oriented appeal to emotional engagement on the part of the viewer, and considers how this might be related to the broader social and industrial contexts in which it appeared

Strategic decision-making process (SDMP) in times of crisis:evidence from Greek banks

This paper investigates the strategic decision making process (SDMP) of Greek banks’ top management in the context of profound organisational changes introduced in 2012 due to the aftermath of the 2008 global financial crisis. It focuses on the impact of three key dimensions of the SDMP, namely, rationality, intuition and political behaviour, relating to four changes introduced, namely, mergers and acquisitions, branch network rationalisation, integration of information technology (IT) and downsizing of operations and personnel. A survey questionnaire was conducted, targeting Greek banks’ top management. Out of 140 questionnaires, 78 were returned, a 55.71% response rate. Data was analysed using structural equation modelling. Research findings identify rationality as a key dimension of SDMP for all organisational changes, as there was high focus on identifying and analysing all required information, use of external financial advisors, and reliance on multiple methods of information gathering. Decision-makers used their intuition in the form of past experience when making acquisition decisions, whilst their personal judgment and “inner voice” were neglected.Finally, political behaviour was not displayed during this process, as decision-makers were open with each other about their interests and preferences, and there was no bargaining, negotiation or use of power amongst them. One limitation was that of not considering all the factors that might help measure SDMP. Also, this study was conducted in a period of political and financial uncertainty for Greek banks, as well as for the Greek economy in general, so findings may not be generalizable to other industries and countries. Conducting interviews could have offered deeper insight as well. This study’s value lies in the fact that the organisational changes were determined by Greece’s leaders, and thus the Greek banks had to operate under a dynamic, inflexible and non-autonomous environment. Also, this study extends prior SDMP research by examining the impact of the three key SDMP dimensions on four types of organisational change