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1 – 10 of over 1000Robin Thomas, Laurent Gerbaud, Herve Chazal and Lauric Garbuio
This paper aims to describe a modelling and solving methodology of a (static converter–electric motor–control) system for its sizing by optimization, considering the dynamic…
Abstract
Purpose
This paper aims to describe a modelling and solving methodology of a (static converter–electric motor–control) system for its sizing by optimization, considering the dynamic thermal heating of the machine.
Design/methodology/approach
The electrical drive sizing model is composed of two simulators (electrical and thermal) that are co-simulated with a master−slave relationship for the time step management. The computation is stopped according to simulation criteria.
Findings
This paper details a methodology to represent and size an electrical drive using a multiphysics and multidynamics approach. The thermal simulator is the master and calls the electrical system simulator at a fixed exchange time step. The two simulators use a dedicated dynamic time solver with adaptive time step and event management. The simulation automatically stops on pre-established criteria, avoiding useless simulations.
Research limitations/implications
This paper aims to present a generic methodology for the sizing by optimization of electrical drives with a multiphysics approach, so the precision and computation time highly depend on the modelling method of each components. A genetic multiobjective optimization algorithm is used.
Practical implications
The methodology can be applied to size electrical drives operating in a thermally limited zone. The power electronics converter and electrical machine can be easily adapted by modifying their sub-model, without impacting the global model and simulation principle.
Originality/value
The approach enables to compute a maximum operating duration before reaching thermal limits and to use it as an optimization constraint. These system considerations allow to over constrain the electrical machine, enabling to size a smaller machine while guaranteeing the same output performances.
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The National Food Survey records of household food purchases and information concerning the dietary pattern of the population, obtained from estimates of total food consumption in…
Abstract
The National Food Survey records of household food purchases and information concerning the dietary pattern of the population, obtained from estimates of total food consumption in the UK showed that the nutritional value of the household diet exceeded the recommended daily intake for the majority of nutrients, at least until the end of 1973. However, it is known that with decreasing family income and increasing family size, average nutrient intake may fall below the recommended daily level for a few nutrients. The National Food Survey gives no indication of how food is distributed within the home, and it has long been recognised that children are a vulnerable group, particularly within larger families (3–4 or more children) on low incomes. The school meal was developed partially as a means of improving the diets of such vulnerable children.
This is an outline of findings from research aimed at identifying the emerging issues around the formation of a jointly managed and staffed community rehabilitation service in…
The purpose of this paper is to critically review the relationship between management research and practice particularly in the UK.
Abstract
Purpose
The purpose of this paper is to critically review the relationship between management research and practice particularly in the UK.
Design/methodology/approach
The paper takes the form of an historical survey of initiatives and different conceptual approaches.
Findings
The paper reveals a central focus on the role of management consultants in mediating between management practice and management knowledge,
Research limitations/implications
The paper is a partial and limited analysis of a complex process: more work is needed to untangle the various institutional roles and conceptual frameworks.
Practical implications
Re‐framing the relationship between management research and practice to consider a greater emphasis on practice engaged scholarship and the two way process of knowledge translation.
Originality/value
The paper encourages a new perspective amongst policy makers, researchers and management consultants.
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The purpose of this paper takes an overview of the history of both the funding and the assessment of research within Business Schools in the wider context of social science…
Abstract
Purpose
The purpose of this paper takes an overview of the history of both the funding and the assessment of research within Business Schools in the wider context of social science research which examines the practice of management.
Design/methodology/approach
Historical archives and current statistical data are both considered in the context of various writings on the nature of management and business school research.
Findings
Many of the issues are deep seated but overall it is particularly important to emphasise the importance of “translation” in both engagement and interaction and also better links through intermediaries.
Originality/value
The paper adds to the on‐going debate about the relevance of management research as well as the role of business school.
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Matteo Sorci, Thomas Robin, Javier Cruz, Michel Bierlaire, J.-P. Thiran and Gianluca Antonini
Facial expression recognition by human observers is affected by subjective components. Indeed there is no ground truth. We have developed Discrete Choice Models (DCM) to capture…
Abstract
Facial expression recognition by human observers is affected by subjective components. Indeed there is no ground truth. We have developed Discrete Choice Models (DCM) to capture the human perception of facial expressions. In a first step, the static case is treated, that is modelling perception of facial images. Image information is extracted using a computer vision tool called Active Appearance Model (AAM). DCMs attributes are based on the Facial Action Coding System (FACS), Expression Descriptive Units (EDUs) and outputs of AAM. Some behavioural data have been collected using an Internet survey, where respondents are asked to label facial images from the Cohn–Kanade database with expressions. Different models were estimated by likelihood maximization using the obtained data. In a second step, the proposed static discrete choice framework is extended to the dynamic case, which considers facial video instead of images. The model theory is described and another Internet survey is currently conducted in order to obtain expressions labels on videos. In this second Internet survey, videos come from the Cohn–Kanade database and the Facial Expressions and Emotions Database (FEED).
Karl-Emanuel Dionne and Paul Carlile
Innovation challenges are increasingly complex, cutting across distributed actors from different disciplines, organizations, and fields. Solving such challenges requires creating…
Abstract
Innovation challenges are increasingly complex, cutting across distributed actors from different disciplines, organizations, and fields. Solving such challenges requires creating the capacities of opening up for innovation to access and develop a greater amount and variety of knowledge and resources. Perspectives on open source, open innovation, and interorganizational collaboration have explored such capacities, but from different origins and scopes of analysis. Our practice-based integrative framework of “opening innovation” helps highlight these differences and connect their relative strengths. Through a critical literature review paired with an analysis of different empirical cases from Hacking Health, a non-profit organization helping drive digital health innovation, the authors reveal the user-centric, firm-centric, and field-centric approaches to opening innovation that progressively connect a greater variety of actors and resources. The authors show how specific new relational practices they produce address the new relational dynamics these connections bring to accumulate more resources for innovation to keep progressing.
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