To propose and investigate a stable numerical procedure for the reconstruction of the velocity of a viscous incompressible fluid flow in linear hydrodynamics from knowledge of the…
Abstract
Purpose
To propose and investigate a stable numerical procedure for the reconstruction of the velocity of a viscous incompressible fluid flow in linear hydrodynamics from knowledge of the velocity and fluid stress force given on a part of the boundary of a bounded domain.
Design/methodology/approach
Earlier works have involved the similar problem but for stationary case (time‐independent fluid flow). Extending these ideas a procedure is proposed and investigated also for the time‐dependent case.
Findings
The paper finds a novel variation method for the Cauchy problem. It proves convergence and also proposes a new boundary element method.
Research limitations/implications
The fluid flow domain is limited to annular domains; this restriction can be removed undertaking analyses in appropriate weighted spaces to incorporate singularities that can occur on general bounded domains. Future work involves numerical investigations and also to consider Oseen type flow. A challenging problem is to consider non‐linear Navier‐Stokes equation.
Practical implications
Fluid flow problems where data are known only on a part of the boundary occur in a range of engineering situations such as colloidal suspension and swimming of microorganisms. For example, the solution domain can be the region between to spheres where only the outer sphere is accessible for measurements.
Originality/value
A novel variational method for the Cauchy problem is proposed which preserves the unsteady Stokes operator, convergence is proved and using recent for the fundamental solution for unsteady Stokes system, a new boundary element method for this system is also proposed.
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Mousa Huntul, Daniel Lesnic and Tomas Johansson
The purpose of this study is to provide an insight and to solve numerically the identification of an unknown coefficient of radiation/absorption/perfusion appearing in the heat…
Abstract
Purpose
The purpose of this study is to provide an insight and to solve numerically the identification of an unknown coefficient of radiation/absorption/perfusion appearing in the heat equation from additional temperature measurements.
Design/methodology/approach
First, the uniqueness of solution of the inverse coefficient problem is briefly discussed in a particular case. However, the problem is still ill-posed as small errors in the input data cause large errors in the output solution. For numerical discretization, the finite difference method combined with a regularized nonlinear minimization is performed using the MATLAB toolbox routine lsqnonlin.
Findings
Numerical results presented for three examples show the efficiency of the computational method and the accuracy and stability of the numerical solution even in the presence of noise in the input data.
Research limitations/implications
The mathematical formulation is restricted to identify coefficients which separate additively in unknown components dependent individually on time and space, and this may be considered as a research limitation. However, there is no research implication to overcome this, as the known input data are also limited to single measurements of temperature at a particular time and space location.
Practical implications
As noisy data are inverted, the study models real situations in which practical measurements are inherently contaminated with noise.
Social implications
The identification of the additive time- and space-dependent perfusion coefficient will be of great interest to the bio-heat transfer community and applications.
Originality/value
The current investigation advances previous studies which assumed that the coefficient multiplying the lower-order temperature term depends on time or space separately. The knowledge of this physical property coefficient is very important in biomedical engineering for understanding the heat transfer in biological tissues. The originality lies in the insight gained by performing for the first time numerical simulations of inversion to find the coefficient additively dependent on time and space in the heat equation from noisy measurements.
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Peter E. Johansson, Helena Blackbright, Tomas Backström, Jennie Schaeffer and Stefan Cedergren
The purpose of this paper is to increase the understanding regarding how managers attempt to make purposeful use of innovation management self-assessments (IMSA) and performance…
Abstract
Purpose
The purpose of this paper is to increase the understanding regarding how managers attempt to make purposeful use of innovation management self-assessments (IMSA) and performance information (PI).
Design/methodology/approach
An interpretative perspective on purposeful use is used as an analytical framework, and the paper is based on empirical material from two research projects exploring the use of IMSA and PI in three case companies. Based on the empirical data, consisting of interviews and observations of workshops and project meetings, qualitative content analysis has been conducted.
Findings
The findings of this paper indicate that how managers achieve a purposeful use of PI is related to their approach toward how to use the specific PI at hand, and two basic approaches are analytically separated: a rule-based approach and a reflective approach. Consequently, whether or not the right thing is being measured also becomes a question of how the PI is actually being interpreted and used. Thus, the extensive focus on what to measure and how to measure it becomes edgeless unless equal attention is given to how managers are able to use the PI to make knowledgeable decisions regarding what actions to take to achieve the desired changes.
Practical implications
Given the results, it comes with a managerial responsibility to make sure that all managers who are supposed to be engaged in using the PI are given roles in the self-assessments that are aligned with the level of knowledge they possess, or can access.
Originality/value
How managers purposefully use PI is a key to understand the potential impact of self-assessments.
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This study provides a comprehensive framework of adaptation in triadic business relationship settings in the service sector. The framework is based on the industrial network…
Abstract
This study provides a comprehensive framework of adaptation in triadic business relationship settings in the service sector. The framework is based on the industrial network approach (see, e.g., Axelsson & Easton, 1992; Håkansson & Snehota, 1995a). The study describes how adaptations initiate, how they progress, and what the outcomes of these adaptations are. Furthermore, the framework takes into account how adaptations spread in triadic relationship settings. The empirical context is corporate travel management, which is a chain of activities where an industrial enterprise, and its preferred travel agency and service supplier partners combine their resources. The scientific philosophy, on which the knowledge creation is based, is realist ontology. Epistemologically, the study relies on constructionist processes and interpretation. Case studies with in-depth interviews are the main source of data.
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Kajsa Ellegärd, Dan Jonsson, Tomas Engström, Mats I. Johansson, Lars Medbo and Bertil Johansson
Presents some theoretical principles and empirical evidencerelating to the new Swedish production systems for final assembly ofmotor vehicles. Contends that in these production…
Abstract
Presents some theoretical principles and empirical evidence relating to the new Swedish production systems for final assembly of motor vehicles. Contends that in these production systems it is possible simultaneously to enhance efficiency and quality of working life. Briefly sketches three production forms as they apply to the final assembly of automobiles and discusses the societal environments in which these different forms of production have evolved. Focuses on Volvo′s Swedish Uddevalla plant as one of the main examples so far of a reflective production system for final assembly of automobiles. Amplifies the analysis of different production flow patterns for final assembly and in particular addresses the issue of semi‐parallel mechanistic production flow and parallel organic production flow as alternatives to serial flow on a conventional line assembly.
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Tomas Backström and Rachael Tripney Berglund
The study objectives were to (1) identify if providing solution-focused interaction training enables managers and employees to develop and implement actions to improve their…
Abstract
Purpose
The study objectives were to (1) identify if providing solution-focused interaction training enables managers and employees to develop and implement actions to improve their psychosocial work environment and (2) test a recontextualization of the psychosocial work environment as social structures affecting members of the workplace and verify if social interactions effectively change the local psychosocial work environment.
Design/methodology/approach
The intervention involved training managers, supervisors and employees in solution-focused interaction. This study used a controlled interrupted time-series design, with an intervention and control group (CG) and pre- and post-measurements.
Findings
The psychosocial work environment improved, indicating that the training led to better social interactions, contributing to changes in the social structures within the intervention group (IG). Collective reflection between participants in the take action phase was the key to success. The recontextualization uncovered these mechanisms.
Research limitations/implications
The present study supports a recontextualization of the psychosocial work environment as primarily decided by social structures that emerge in recurrent interactions within work teams. The same social structures also seem to be important for other features of the production system, like job performance.
Practical implications
Training designed to enable high-quality social interactions, like dialogue and collective reflection, has proven to be effective in changing social structures. Moreover, managers may need training in facilitating the collective reflection between participants. Increased focus on social interactions within work teams is suggested for future study of organizational change processes, psychosocial work environment and practical psychosocial work environment management.
Originality/value
The intervention was delivered in the preparation phase to enable an effective take action phase. Both phases are less studied in psychosocial risk assessments research. The recontextualization has never been fully used in psychosocial research.
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This chapter complements the one that appeared as “History of the AIB Fellows: 1975–2008” in Volume 14 of this series (International Business Scholarship: AIB Fellows on the First…
Abstract
This chapter complements the one that appeared as “History of the AIB Fellows: 1975–2008” in Volume 14 of this series (International Business Scholarship: AIB Fellows on the First 50 Years and Beyond, Jean J. Boddewyn, Editor). It traces what happened under the deanship of Alan Rugman (2011–2014) who took many initiatives reported here while his death in July 2014 generated trenchant, funny, and loving comments from more than half of the AIB Fellows. The lives and contributions of many other major international business scholars who passed away from 2008 to 2014 are also evoked here: Endel Kolde, Lee Nehrt, Howard Perlmutter, Stefan Robock, John Ryans, Vern Terpstra, and Daniel Van Den Bulcke.
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Birutė Mockevičienė and Tomas Vedlūga
The chapter is designed to discuss the preconditions for the competitiveness of the furniture industry, global networks and regional perspectives, as well as the competitive…
Abstract
The chapter is designed to discuss the preconditions for the competitiveness of the furniture industry, global networks and regional perspectives, as well as the competitive advantages of different regions such as the USA, Europe and the East. The challenges created by customisation and the needs of consumers for individual products are also discussed. As consumers become more and more focussed on furniture designed exclusively for them, the furniture business has to reorient its production and has to deal with a number of management issues. It is necessary to reconsider not only how to involve consumers but also how to keep prices competitive because even for an individual order, the customer is less and less willing to pay more. The issue of new product development is also discussed. It delves into the management of furniture companies, the characteristic organisational structures, and management models that could ensure the sustainability of the business. Particular attention is paid to the digital issues of furniture manufacturing and enterprise resource planning (ERP) in particular. An examination of how the furniture sector evaluates prices and costs, which are the most popular methods and which can be used for forecasting, looks at the most important global trends. Such cost estimation methods as cost-based, competition-based, analogous-based, and expert-based are discussed, highlighting the limits of their applications. Then discusses current trends and the current IT supply, which unfortunately does not fully meet the needs of customised furniture production, and digitisation within a small company becomes more difficult. So, companies have to recognise the limits of digitisation.
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Reports results from research collaboration between university andindustry from the last six years (1985‐91) intensive work on thedevelopment of the radically new production…
Abstract
Reports results from research collaboration between university and industry from the last six years (1985‐91) intensive work on the development of the radically new production concepts in use today in Volvo Car Corporation′s Uddevalla plant. Important breakthroughs in knowledge have been realized, including a product description adapted to assembly, new material supply systems and layouts for final assembly. This product description allowed performance to be determined for alternative production concepts. It is also a basic precondition for maintaining a logic in how the material is displayed and assembly work described, and is therefore formalized, principally through material supply systems, information systems and final assembly layouts. Emphasizes that efficient long cycle assembly work and flexible manufacturing assume both completely new preconditions on the shopfloor and a new management form. Makes clear, however, that these pre‐conditions demand a basically untraditional way of reasoning.
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Tomas Engström, Dan Jonsson and Lars Medbo
Argues that the design of the Volvo Uddevalla plant may be described as a process with an “internal logic” in which design options were eliminated through irreversible design…
Abstract
Argues that the design of the Volvo Uddevalla plant may be described as a process with an “internal logic” in which design options were eliminated through irreversible design decisions until only one alternative remained ‐ an unorthodox alternative comprising, for example, long cycle time work never used before for full‐scale production of automobiles. Contends that the most innovative features of the Uddevalla plant ‐ i.e. the detailed layout in the assembly workshops and the corresponding unorthodox production principles used ‐ were in many respects an unanticipated outcome of the design process. Pre‐existing gross layout of the plant as well as the interaction between the materials feeding techniques adopted and the operation of the automated guided vehicle system. When this was perceived by the Volvo managers, the design process had passed the point of no return, i.e. the investments made and lack of time prevented regression to more traditional layouts and production principles.