The purpose of this paper is to determine the manner in which a yield stress fluid begins convecting when it saturates a porous medium. A sidewall-heated rectangular cavity is…
Abstract
Purpose
The purpose of this paper is to determine the manner in which a yield stress fluid begins convecting when it saturates a porous medium. A sidewall-heated rectangular cavity is selected as the testbed for this pioneering work.
Design/methodology/approach
Steady solutions are obtained using a second order accurate finite difference method, line relaxation based on the Gauss-Seidel smoother, a Full Approximation Scheme multigrid algorithm with V-cycling and a regularization of the Darcy-Bingham model to smooth the piecewise linear relation between the Darcy flux and the applied body forces.
Findings
While Newtonian fluids always convect whenever the Darcy-Rayleigh number is nonzero, Bingham fluids are found to convect only when the Darcy-Rayleigh number exceeds a value which is linearly dependent on both the Rees-Bingham number and the overall perimeter of the rectangular cavity. Stagnation is always found in the centre of the cavity and in regions close to the four corners. Care must be taken over the selection of the regularization constant.
Research limitations/implications
The Darcy-Rayleigh number is restricted to values which are at or below 200.
Originality/value
This is the first investigation of the effect of yield stress on nonlinear convection in porous media.
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D. Andrew S. Rees and Donald A. Nield
The purpose of this paper is to determine how the presence of an embedded, centrally placed, solid but heat-conducting block affects the onset and development of Darcy-Bénard…
Abstract
Purpose
The purpose of this paper is to determine how the presence of an embedded, centrally placed, solid but heat-conducting block affects the onset and development of Darcy-Bénard convection.
Design/methodology/approach
Steady solutions are obtained using finite difference methods with SOR as the smoother. A detailed presentation is given of how the interface conditions are modelled, and how a continuity of pressure argument is used to determine the value of the streamfunction on the solid block.
Findings
The presence of the block affects strongly both the onset of convection and the nonlinear properties such as the mean Nusselt number and the strength of the fluid circulation. The smallest possible critical Darcy-Rayleigh is found to be 22.0152, which is smaller than 4π2, the value when the block is absent.
Research limitations/implications
The Darcy-Rayleigh number is restricted to values at or below 200, which is five times the critical value without a solid block, but the size and conductivity of the block vary between all admissible values.
Originality/value
This is the first investigation of the effect of internal obstacles on Darcy-Bénard convection.
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Pawan Budhwar, Andy Crane, Annette Davies, Rick Delbridge, Tim Edwards, Mahmoud Ezzamel, Lloyd Harris, Emmanuel Ogbonna and Robyn Thomas
Wonders whether companies actually have employees best interests at heart across physical, mental and spiritual spheres. Posits that most organizations ignore their workforce �…
Abstract
Wonders whether companies actually have employees best interests at heart across physical, mental and spiritual spheres. Posits that most organizations ignore their workforce – not even, in many cases, describing workers as assets! Describes many studies to back up this claim in theis work based on the 2002 Employment Research Unit Annual Conference, in Cardiff, Wales.
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Evaluates changes in the welfare system in Sweden, the UK and the USA over a decade, basing arguments on the divergence of economic globalization and domestic forces. Presents…
Abstract
Evaluates changes in the welfare system in Sweden, the UK and the USA over a decade, basing arguments on the divergence of economic globalization and domestic forces. Presents brief economic snapshots of each country, stating quite categorically that the welfare state is an impediment to capitalist profit‐making, hence all three nations have retrenched welfare systems in the hope of remaining globally economically competitive. Lays the responsibility for retrenchment firmly at the door of conservative political parties. Takes into account public opinion, national institutional structures, multiculturalism and class issues. Explores domestic structures of accumulation (DSA) and refers to changes in the international economy, particularly the Bretton Woods system (Pax Americana), and notes how the economic health of nations mirrors that of the US. Investigates the roles of multinationals and direct foreign investment in the global economy, returning to how economic policy affects the welfare state. Points out the changes made to the welfare state through privatization, decentralization and modification of public sector financing. Concludes that the main result has been an increase in earnings inequality and poverty.
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Oswaldo Morales, Andrew N. Kleit and Gareth H. Rees
The purpose of this paper is to introduce a country’s mixed history of colonialism and cultural heritage as a background to the management of a mining company’s community…
Abstract
Purpose
The purpose of this paper is to introduce a country’s mixed history of colonialism and cultural heritage as a background to the management of a mining company’s community engagement. Mining-related social conflicts have intensified in Peru as mining expansion challenges Andean people’s traditional livelihoods. It is generally thought that resolving such conflicts requires a set of long-term strategies and engagement.
Design/methodology/approach
The case study has been developed using an inductive methodology through content analysis of newspaper reports, official documents and the academic literature. It follows a complex and evolving situation, blending social and cultural theory and norms with actual events to provide insight into the conflicts’ historical, social and cultural forces.
Findings
Mining conflicts are complex business and strategic problems that call for a more thorough analysis of causal variables and a deeper understanding of the underlying cultural and historical forces. Transactional community engagement responses may not always be adequate to maintain a mining project’s social licence.
Originality/value
Based on the information presented, students can use the case as a means to examine and critique community engagement approaches to social conflict resolution through this summary of a real-life example of social conflict in Peru’s mining industry. The case may also be used as the basis for teaching forward planning and contingency management for long-term projects involving stakeholders and potential conflict. The case has been used as a resource for teaching communications, risk evaluation and community engagement strategies as part of a Master’s in the Energy Sector Management programme in Peru.
Propósito
Este caso propone una introducción a la historia del colonialismo y multiculturalismo en el Perú relacionado con el manejo de las relaciones comunitarias por parte del sector minero. Los conflictos sociales provenientes de la actividad minera se han intensificado en el Perú debido a que esta industria insiste en desafiar el estilo de vida de los pueblos andinos. Se piensa que una solución de estos conflictos requiere un conjunto de estrategias y compromisos a largo plazo.
Diseño/metodología/enfoque
El estudio de caso se ha desarrollado utilizando una metodología inductiva a través del análisis de contenido de informes periodísticos, documentos oficiales y la literatura académica. Se analiza una situación compleja, mezclando la teoría y las normas sociales y culturales con los acontecimientos actuales para proporcionar una visión de las fuerzas históricas, sociales y culturales que sustentan los acontecimientos que ocurren.
Hallazgos
Los conflictos mineros son problemas de negocios complejos y estratégicos que requieren un análisis más profundo de las variables causales y una comprensión más profunda de las fuerzas culturales e históricas subyacentes. Las respuestas transaccionales de participación de la comunidad no siempre son adecuadas para mantener la licencia social de un proyecto minero.
Originalidad/valor
Basados en la información presentada, los estudiantes pueden usar el caso como un medio para examinar y criticar los enfoques de participación comunitaria en la resolución de conflictos sociales a través de un ejemplo real de conflicto social en la industria minera peruana. El caso también puede utilizarse como base para enseñar la planificación anticipada y la gestión de contingencias para proyectos a largo plazo que involucren a las partes interesadas. El caso se ha utilizado como recurso para la enseñanza de comunicaciones, estrategia, evaluación de riesgos y de participación comunitaria como parte de un programa de Maestría en Gestión del Sector Energético en Perú.
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Aarhus Kommunes Biblioteker (Teknisk Bibliotek), Ingerslevs Plads 7, Aarhus, Denmark. Representative: V. NEDERGAARD PEDERSEN (Librarian).
President Bill Clinton has had many opponents and enemies, most of whom come from the political right wing. Clinton supporters contend that these opponents, throughout the Clinton…
Abstract
President Bill Clinton has had many opponents and enemies, most of whom come from the political right wing. Clinton supporters contend that these opponents, throughout the Clinton presidency, systematically have sought to undermine this president with the goal of bringing down his presidency and running him out of office; and that they have sought non‐electoral means to remove him from office, including Travelgate, the death of Deputy White House Counsel Vincent Foster, the Filegate controversy, and the Monica Lewinsky matter. This bibliography identifies these and other means by presenting citations about these individuals and organizations that have opposed Clinton. The bibliography is divided into five sections: General; “The conspiracy stream of conspiracy commerce”, a White House‐produced “report” presenting its view of a right‐wing conspiracy against the Clinton presidency; Funding; Conservative organizations; and Publishing/media. Many of the annotations note the links among these key players.
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IN the April number of Public Libraries, Mr. Andrew Keogh, sometime of Newcastle‐on‐Tyne, now Professor of Bibliography at Yale University, comes forward in defence of American…
Abstract
IN the April number of Public Libraries, Mr. Andrew Keogh, sometime of Newcastle‐on‐Tyne, now Professor of Bibliography at Yale University, comes forward in defence of American libraries from the aspersions alleged to be cast on them in this periodical. Other journalistic comments have also appeared, which we may have occasion to mention at another time; and altogether some pother has been caused in America over our very straightforward and simple remarks. Mr. Keogh assumes, quite erroneously, that the first Library World editorial was based on the one or two instances of American reference to European libraries which he quotes. He knows, however, just as well as ourselves, that the American pose in library work is to adopt an attitude akin to contempt for anything outside the boundaries of the United States, and this is shown in nearly every publication dealing with library work. The Nation example was only one which happened to come along at the moment, and it is direct confirmation of what was stated in these columns in April, namely, that even in secular journals the writers were, as Mr. Keogh now certifies, prominent members of the A.L.A. Our attitude is, therefore, not that of defence simply, against certain outsiders writing in non‐professional journals, but against American professional librarians lending themselves to the poor work of trying to belittle the efforts of European librarians on every possible occasion. The mere fact that, as Mr. Keogh affirms, the great research libraries of Germany were attacked in the Nation, does not justify the publication of such ungenerous articles, especially coming from librarians who profess so much friendliness and high feeling.
In the last four years, since Volume I of this Bibliography first appeared, there has been an explosion of literature in all the main functional areas of business. This wealth of…
Abstract
In the last four years, since Volume I of this Bibliography first appeared, there has been an explosion of literature in all the main functional areas of business. This wealth of material poses problems for the researcher in management studies — and, of course, for the librarian: uncovering what has been written in any one area is not an easy task. This volume aims to help the librarian and the researcher overcome some of the immediate problems of identification of material. It is an annotated bibliography of management, drawing on the wide variety of literature produced by MCB University Press. Over the last four years, MCB University Press has produced an extensive range of books and serial publications covering most of the established and many of the developing areas of management. This volume, in conjunction with Volume I, provides a guide to all the material published so far.