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Publication date: 14 December 2023

Thomas Legrand

This chapter presents a spiritual or wisdom-based approach to development, its rationale, conceptualization, methods and examples of applications. The politics of being proposes…

Abstract

This chapter presents a spiritual or wisdom-based approach to development, its rationale, conceptualization, methods and examples of applications. The politics of being proposes that societies explicitly make the fulfillment (‘being’) of all its members – humans and non-humans – their main goal, which should guide the development and implementation of public policies. It stands in opposition to the current development paradigm focused on economic growth or ‘having’, and rooted in a set of modern western values – individualism, materialism, reductionism, anthropocentrism, etc. By nourishing our relational nature, the politics of being can address the root causes of the meta crisis the world is facing, reconciling human flourishing with sustainability and supporting the cultural evolution that is needed. It proposes a dialogue between wisdom and science, the two main areas of knowledge, to guide its design and implementation. It conceptualizes ‘being’ as the actualization of our truest ‘being’ and our highest ‘being’. This means that societies should provide the right conditions for their human members to express themselves and fulfil their healthy aspirations, as well as to develop human virtues and qualities. Wisdom traditions and spiritual teachings offer relevant insights into the nature of human fulfilment and the process of spiritual evolution that can be applied to societies. They emphasize the cultivation of spiritual values and qualities such as love, peace, happiness, life, mindfulness, mystery and the understanding of interconnectedness. In recent decades, these qualities have become areas of scientific research and been at the core of social change and development initiatives. Together they can serve as the foundations of the politics of being and allow to identify actionable public policy agendas in many sectors mainly based on existing examples.

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Applied Spirituality and Sustainable Development Policy
Type: Book
ISBN: 978-1-83753-381-7

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Article
Publication date: 4 September 2018

Lukasz Knypinski, Krzysztof Kowalski and Lech Nowak

The purpose of this paper is to elaborate algorithm and software for the optimization of the actuator–capacitor system taking the dynamics parameters into account. The system is…

95

Abstract

Purpose

The purpose of this paper is to elaborate algorithm and software for the optimization of the actuator–capacitor system taking the dynamics parameters into account. The system is applied for driving the valve of plasma gun. Two optimization strategies are proposed and pondered. The penalty function approach has been expanded in detail.

Design/methodology/approach

The field-circuit mathematical model of the dynamics operation consists of the strongly coupled equations of the transient electromagnetic fields and the equations of the electric circuit. The numerical implementation is based on finite element method and step-by-step Cranck–Nicholson procedure. The genetic algorithm has been used in the optimization procedure. The sigmoidal transformation has been applied to adjust the classical external penalty function method to the genetic algorithm.

Findings

The modification consists in adaptation of the penalty function to the genetic algorithm. In the proposed approach, operations involving successive iterations of increasing penalty function and operations containing genetic iterations are intertwined with each other. The differences between these two procedures are getting blurred. The proposed approach is very effective. It is possible to achieve optimal solution even more than ten times faster than using the classical method.

Originality/value

The proposed approach can be successfully applied to designing and optimization of different electromagnetic devices, including functional constraints.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 37 no. 5
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 1 April 1995

L. Nowak, A. Demenko, K. Kowalski and W. Szelag

Paper presents an effective iterative method for 3D magnetic field calculation taking the nonlinearity and anisotropy of the material into account. Algorithm for simulation of…

43

Abstract

Paper presents an effective iterative method for 3D magnetic field calculation taking the nonlinearity and anisotropy of the material into account. Algorithm for simulation of coupled 3D field‐circuit transient problems has been also elaborated. Some steady‐state and transient characteristics of the E‐core electromagnet and shell‐type transformer have been calculated.

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COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 14 no. 4
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 1 August 1998

Lech Nowak and Andrzej Demenko

An algorithm for simultaneous solution of equations describing transient 3D magnetic field coupled to the Kirchhoff’s equations and the equation of motion has been presented. The…

223

Abstract

An algorithm for simultaneous solution of equations describing transient 3D magnetic field coupled to the Kirchhoff’s equations and the equation of motion has been presented. The nonlinearity and anisotropy of the magnetic core have been taken into account. Numerical implementation of the algorithm is based on the finite element method. In order to solve the 3D problem a special iterative procedure, in which the 3D task is substituted with a sequence of 2D problems, has been proposed. The time‐stepping backward difference algorithm for the time‐discretization of the electric circuit equations has been applied. To determine the moving armature position, an implicit procedure, which is unconditionally stable has been proposed. For the sake of example, the calculations of dynamic operation of the E‐type electromagnetic actuator equipped with the shading coil have been performed.

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COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 17 no. 4
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 3 March 2023

Harry Weber and Wolfgang Mathis

The purpose of this paper is to present a procedure for approximating DC operating points of nonlinear circuits. The presented approach can also be applied in case of multiple DC…

35

Abstract

Purpose

The purpose of this paper is to present a procedure for approximating DC operating points of nonlinear circuits. The presented approach can also be applied in case of multiple DC operating points.

Design/methodology/approach

A generalized Carleman linearization is used, which transforms an algebraic nonlinear equation into an equivalent infinite-dimensional linear system. In general, no close-form solution can be given for the infinite-dimensional linear system. Hence, the infinite-dimensional linear system is approximated by a finite one over a predefined interval using a self-consistent technique. The presented procedure allows to approximate all possible DC operating points within a predefined interval. To isolate all DC operating points, the initial interval is gradually divided into subintervals.

Findings

It is shown that the presented approach is not restricted to the polynomial case and allows to approximate all DC operating points. The presented approach can be applied in case of multiple DC operating points and does not depend on the domain of attraction of the DC operating points.

Originality/value

A new procedure for the approximation of DC operating points of nonlinear circuits based on a generalized Carleman linearization is presented. This approach can be applied in case of multiple DC operating points and is independent of the domain of attraction. Further, this generalized approach is not restricted to the polynomial case and can be applied to a variety of circuits.

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COMPEL - The international journal for computation and mathematics in electrical and electronic engineering , vol. 42 no. 3
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 7 September 2012

Vinay V. Panicker, R. Sridharan and B. Ebenezer

The purpose of this paper is of two‐fold. First, the authors propose the application of genetic algorithm (GA)‐based heuristic for solving a distribution allocation problem for a…

969

Abstract

Purpose

The purpose of this paper is of two‐fold. First, the authors propose the application of genetic algorithm (GA)‐based heuristic for solving a distribution allocation problem for a three‐stage supply chain with fixed cost. Second, a methodology for parameter design in GA is discussed which can lead to better performance of the algorithm.

Design/methodology/approach

A mathematical model is formulated as an integer‐programming problem. The model is solved using GA‐based heuristic and illustrated with a numerical example. An investigation is made for determining the best combination of the parameters of GA using factorial design procedure.

Findings

The optimum population size for the selected problem size is found to be 100. The mutation probability for a better solution is 0.30. The objective function value at the above mentioned levels is better than that obtained at the other combinations.

Research limitations/implications

This work provides a good insight about the fixed cost transportation problem (FCTP) in a three‐stage supply chain and design of numerical parameters for GA. The model developed assumes a single product environment in a single period. Hence, the present study can be extended to a multi‐product, multi‐period, and varying demand environment. In the parameter design, three distinct numerical parameters are considered. The parameters, population size and mutation probability are set at four levels and the parameter, crossover probability is set at three levels. More levels can be selected so that more combinations can be experimented.

Originality/value

The paper presents the formulation and solution of a distribution‐allocation problem in a three‐stage supply chain with fixed cost for a transportation route.

Details

Journal of Manufacturing Technology Management, vol. 23 no. 7
Type: Research Article
ISSN: 1741-038X

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Article
Publication date: 5 May 2015

Łukasz Knypiński, Lech Nowak and Cezary Jedryczka

The purpose of this paper is to elaborate the methodology and software for the optimization of rotor structure of the line-start permanent magnet synchronous motor (LSPMSM). To…

304

Abstract

Purpose

The purpose of this paper is to elaborate the methodology and software for the optimization of rotor structure of the line-start permanent magnet synchronous motor (LSPMSM). To prove usefulness of presented approach the case study problem has been solved.

Design/methodology/approach

The modified particle swarm optimization (PSO) algorithm has been employed for the optimization of LSPMSM. The optimization solver has been elaborated in Delphi environment. The software consists of two modules: an optimization solver and a numerical model of LSPMSM. The model of the considered machine has been developed in the ANSYS Maxwell environment. In the optimization procedure the objective function has been based on maximizing efficiency and power factor.

Findings

Obtained results show that modified PSO algorithm can be successfully applied for the optimization of the rotor structure of LSPMSM. This software can be used as a design tool to improve the performance of LSPMSM. The results of studied case problem illustrate that it is possible to optimize rotor of LSPMSM to achieve good self-starting properties with simultaneous minimization of usage of permanent magnet material.

Research limitations/implications

Both, the simpler lumped parameters model and more advanced field model of the motor were tested. Presented comparison to the results of the finite element analysis (FEA) shows that for considered in the paper the case study problem the accuracy of circuit model is acceptable.

Practical implications

Presented approach and developed software can be used as an effective design tool to improve the performance of LSPMSM.

Originality/value

The paper offers appropriate approach for optimizing the permanent magnet synchronous motors having ability to start by direct connection to the grid.

Details

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, vol. 34 no. 3
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 17 April 2024

Kiyavash Irankhah, Soheil Asadimehr, Golnaz Ranjbar, Behzad Kiani and Seyyed Reza Sobhani

To effectively combat the increasing rates of obesity, it is crucial to explore how environmental factors like sidewalk access impact weight-related outcomes. This study aimed to…

81

Abstract

Purpose

To effectively combat the increasing rates of obesity, it is crucial to explore how environmental factors like sidewalk access impact weight-related outcomes. This study aimed to systematically examine the association between sidewalk accessibility and weight-related outcomes.

Design/methodology/approach

Databases were searched by keywords for relevant articles, which were published before March 3, 2024, to report the role of neighborhood sidewalk access on weight-related outcomes. The main findings of the selected articles were extracted from eligible studies by two independent reviewers.

Findings

A total of 20 out of 33 studies indicated a significant negative relationship between access to sidewalks and weight-related outcomes. Three studies demonstrated an indirect relationship between access to sidewalks and weight-related outcomes by greater access to physical environments. In addition, five studies reported no clear relationship, and three studies reported a significantly positive relationship between access to sidewalks and weight-related outcomes.

Practical implications

In general, people who live in urban areas with better sidewalk access benefit from better weight-related outcomes. Adults showed this correlation more prominently than adolescents and children. Therefore, sidewalks that have a positive effect on physical activity levels could be considered as a preventive measure against obesity.

Originality/value

One of the weight-related outcomes is obesity. Every community faces numerous challenges due to obesity, which adversely affects the quality of life and health. Environmental factors such as access to sidewalks could be associated with body weight due to lifestyle influences.

Details

Nutrition & Food Science , vol. 54 no. 4
Type: Research Article
ISSN: 0034-6659

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Article
Publication date: 4 May 2012

Jean‐François Lange, Laurent Gerbaud, Hieu Nguyen‐Huu and James Roudet

An analytical approach is preferred to carry out the harmonic modelling of power electronics converters because it is generally faster than time simulation chained with FFT…

190

Abstract

Purpose

An analytical approach is preferred to carry out the harmonic modelling of power electronics converters because it is generally faster than time simulation chained with FFT. However, the difficulty of such an approach is to build the model and to manage the uncontrolled commutations that occur in the studied static converter, and also to deal with large equations. The purpose of this paper is to propose an aid in the frequency modelling of the drive elements, in the frequency domain, including all key parameters for sizing aim i.e. a way to optimize the EMC filter using different algorithms.

Design/methodology/approach

The paper aims to propose an aid to create such models, and to assure its good solving, i.e. that the correct operating mode is represented. So, the solving problem is formulated as an optimization problem under constraints, to solve this difficulty.

Findings

The difficulty is to be sure to deal with the good operating mode of the static converter when soft or uncontrolled commutations occur. So, the model is formulated as a constrained optimization problem. The paper proposes a symbolic approach, that allows to build automatically the frequency model. It is translated to be solved in Matlab.

Research limitations/implications

The approach does not fit for static converters with a control implying numerous commutations per operating period. However, the approach deals with natural and soft commutations.

Originality/value

The modelling is based on the use of linear components and ideal switches.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 31 no. 3
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 1 December 2004

Lech Nowak, Andrzej Demenko and Wojciech Szeląg

This paper deals with a coupled field‐circuit simulation of transients in a three‐phase, three‐limb power transformer taking non‐linearity into consideration. A comparative…

424

Abstract

This paper deals with a coupled field‐circuit simulation of transients in a three‐phase, three‐limb power transformer taking non‐linearity into consideration. A comparative analysis of the results obtained from the application of 3D and 2D field models has been carried out. Owing to core saturation and the non‐periodic components of the magnetic fluxes, the magnetic field exists also within the space surrounding the core. Hence, three‐dimensional description is necessary. It has been proved that assuming the 2D model significantly overstated peak values of currents are obtained.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 23 no. 4
Type: Research Article
ISSN: 0332-1649

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