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1 – 10 of 391H. Szambolics, L.D. Buda‐Prejbeanu, J.C. Toussaint and O. Fruchart
The aim of this work is to present the details of the finite element approach that was developed for solving the Landau‐Lifschitz‐Gilbert (LLG) equations in order to be able to…
Abstract
Purpose
The aim of this work is to present the details of the finite element approach that was developed for solving the Landau‐Lifschitz‐Gilbert (LLG) equations in order to be able to treat problems involving complex geometries.
Design/methodology/approach
There are several possibilities to solve the complex LLG equations numerically. The method is based on a Galerkin‐type finite element approach. The authors start with the dynamic LLG equations, the associated boundary condition and the constraint on the magnetization norm. They derive the weak form required by the finite element method. This weak form is afterwards integrated on the domain of calculus.
Findings
The authors compared the results obtained with our finite element approach with the ones obtained by a finite difference method. The results being in very good agreement, it can be stated that the approach is well adapted for 2D micromagnetic systems.
Research limitations/implications
The future work implies the generalization of the method to 3D systems. To optimize the approach spatial transformations for the treatment of the magnetostatic problem will be implemented.
Originality/value
The paper presents a special way of solving the LLG equations. The time integration a backward Euler method has been used, the time derivative being calculated as a function of the solutions at times n and n+1. The presence of the constraint on the magnetization norm induced a special two‐step procedure for the calculation of the magnetization at instant n+1.
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I. Firastrau, L.D. Buda‐Prejbeanu, J.C. Toussaint and J‐P. Nozières
The purpose of this paper is to develop an original approach to simulate the reading process for multitrack shielded magneto‐resistive reading (MR) heads.
Abstract
Purpose
The purpose of this paper is to develop an original approach to simulate the reading process for multitrack shielded magneto‐resistive reading (MR) heads.
Design/methodology/approach
The shields and the media are of micron size while the sensor has sizes comparable with the characteristic length scales of the magnetic materials which are of the order of nanometer. Because of this large difference of scales between the different parts of the head, the macroscopic shields and the media are described by a boundary element method (BEM) approach, while the sensor is treated by micromagnetism in order to reconstruct the response of shielded multitrack MR head. To select the most favorable approach, several releases were implemented and compared. A technique based on a full‐coupling procedure was found to be the most general but too expensive in time. Appling the perfect‐imaging method directly into the micromagnetic simulator, the authors succeed in accelerating the computation without loosing accuracy.
Findings
Solving by BEM the Poisson equation for the scalar magnetic potential only the surfaces interfaces are discretised, saving thus computation time and memory resources. In addition, for multi‐tracks data pattern, the magnetic scalar potential may be estimated with a good approximation by considering a periodic system along the crosstrack direction. By applying the Fourier series expansion for the magnetic charges distribution along the crosstrack direction, the initial BEM 3D problem can be treated as a bi‐dimensional one.
Originality/value
This macroscopic‐microscopic coupling technique allows a full description of the behaviour of the magnetic sensor in its environment, being a useful tool for the design and the optimisation of the multitrack MR reading heads.
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Pauline Zeiler and Richard Shipway
This paper explores perspectives of elite female athletes competing at world championship sports events, hosted in extreme climatic conditions. From the athlete perspective, it…
Abstract
Purpose
This paper explores perspectives of elite female athletes competing at world championship sports events, hosted in extreme climatic conditions. From the athlete perspective, it examines the implications of decisions by global sports federations when selecting host cities and the subsequent impacts upon elite athletes competing in unfavourable climates.
Design/methodology/approach
Using an exploratory case study approach at the 2019 IAAF World Athletics Championships in Doha, Qatar, this paper explores insider perspectives of four elite female participants competing in the Marathon. Adopting the “elite interviewing” technique, and based on event participant experiences, the paper prioritises the perspective and “voice” of the athlete.
Findings
Four key themes emerged from the data. These were (1) the importance of training and preparation; (2) unique challenges of competition day; (3) elite athlete retrospection; and (4) prioritising the perspectives of elite athletes at international sports events. The findings highlight the challenges of managing athlete preparation and performance at world championship events hosted in extreme climatic conditions.
Research limitations/implications
The sample size for this study whilst relatively small is unique. This reflects challenges accessing elite athletes, their reluctance to be interviewed, and the small pool of elite athlete talent available. Given these practical barriers, this represents a good sample size.
Originality/value
This paper secures unique insider access to elite level female endurance athletes competing at world championship events. The study makes a contribution to knowledge in event studies by introducing concepts of “elite event interviewing” and the “athlete-event paradox”.
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The cycle of external indebtedness of dependent countries has become a huge constraint on any strategy for radical social change.Argentina has recently entered a new process of…
Abstract
The cycle of external indebtedness of dependent countries has become a huge constraint on any strategy for radical social change.
Argentina has recently entered a new process of debt overhang and renegotiation with the International Monetary Fund and private global creditors. The dominant debate around the country's foreign debt revolves around the conditions that can guarantee the sustainability of repayment. The underlying objective is to remain in the debt system that produces and reproduces dependency.
This chapter will seek to analyze the question of debt sustainability from another point of view: Is it possible to guarantee the (financial) sustainability of the debt at the same time as guaranteeing the sustainability of life? Our argument is that by remaining in the global debt system, Argentina creates conditions that violate the requirements for the sustainability of human and nonhuman life. Drawing on a discussion from Marxist dependency theory and the traditions of Marxist feminism and environmentalism, we will discuss how the debt sustainability argument presupposes the impossibility of reproducing life. In particular, we will show how the conditions required to guarantee debt sustainability in Argentina entail the deepening of the superexploitation of the “productive” and “reproductive” labor force, and the exacerbation of extractivism, putting social reproduction in crisis.
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This chapter addresses the issue of the Global South external debt by mobilizing insights from Modern Monetary Theory, Ecological Economics, and Dependency Theory. It argues that…
Abstract
This chapter addresses the issue of the Global South external debt by mobilizing insights from Modern Monetary Theory, Ecological Economics, and Dependency Theory. It argues that the external debt problem of Southern governments is a reflection of their subordinate economic and monetary status. It shows why the argument of foreign currency shortage often used to explain the need for Southern governments to issue foreign currency debts remains superficial. In contrast to the usual focus on creditors, the chapter highlights the role played by foreign direct investment in the genesis of the chronic external indebtedness of most Southern countries. It argues then that the external debt of the South must be understood holistically not only as a manifestation of the unequal ecological exchange between the North and the South but also as an instrument that has contributed to reproducing and amplifying this pattern. Under these conditions, the cancellation or restructuring of the South's external debt stock and a few other unlikely concessions by the Northern countries will not be enough to abolish the “debt system.” This is an important lesson from the antiimperialist critique of the mid-1970s New International Economic Order (NIEO) agenda that current movements for Southern debt cancellation and Climate Justice would do well to remember.
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Dorothy Y. Hung, Justin Lee and Thomas G. Rundall
In this chapter, we identify three distinct transformational performance improvement (TPI) approaches commonly used to redesign work processes in health care organizations. We…
Abstract
In this chapter, we identify three distinct transformational performance improvement (TPI) approaches commonly used to redesign work processes in health care organizations. We describe the unique components or tools that each approach uses to improve the delivery of health services. We also summarize what is empirically known about the effectiveness of each TPI approach according to systematic reviews and recent studies published in the peer-reviewed literature. Based on examination of this research, we discuss what knowledge is still needed to strengthen the evidence for whole system transformation. This involves the use of conceptual frameworks to assess and guide implementation efforts, and facilitators and barriers to change as revealed in a recent evaluation of one major initiative, the Lean Enterprise Transformation (LET) at the Veterans Health Administration. The analysis suggests ways in which TPI facilitators can be developed and barriers reduced to improve the effectiveness and sustainability of quality initiatives. Finally, we discuss appropriate study designs to evaluate TPI interventions that may strengthen the evidence for their effectiveness in real world practice settings.
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Audrey J. Murrell, Ray Jones, Logan Kauffman, Joseph Bute and John C. Welch
Food security reflects the amount of access and availability of healthy, nutritious, and culturally appropriate food and represents a significant problem both nationally and…
Abstract
Food security reflects the amount of access and availability of healthy, nutritious, and culturally appropriate food and represents a significant problem both nationally and globally. Individuals and families that are considered food insecure experience disparities and inequities in food access and availability and insufficiency in the amount and kind of food required for a healthy lifestyle. We see high food insecurity as a violation of one's rights to a healthy and secure life and a denial of the opportunity for individuals, families, and communities to realize their full potential in society. Thus, we examine food insecurity from three distinct but related perspectives: social responsibility, social justice, and social sustainability. We then explore the link between food insecurity and the “built environment” as needed to shape research, practice, and sustainable solutions in the future.
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With the debt crisis that has been impacting many countries in the Global South since 2015, its spectacular acceleration following the collateral effects of the COVID-19 pandemic…
Abstract
With the debt crisis that has been impacting many countries in the Global South since 2015, its spectacular acceleration following the collateral effects of the COVID-19 pandemic, and the ever-increasing weight of “new” creditors (China, Gulf countries, and private creditors), the old debate for the creation of an international sovereign debt restructuring mechanism under the aegis of the United Nations has resurfaced. Although such a mechanism could constitute a real advance compared to the current situation, it remains very hypothetical, both because of its limits and because of the complexity of the process to be undertaken in view of the adoption of an international treaty endorsing its creation. Above all, it ignores the sovereignty of states and the right to self-determination of peoples. Other solutions exist, which are less complicated, less expensive, and not at all less legitimate, among which the establishment of a moratorium with interest freeze and the creation of an audit committee with citizen participation aiming at canceling or repudiating the illegitimate debts with regard to international law and national legal provisions.
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Melissa A. Norcross and Michael R. Manning
The presence and practice of individual and organizational humility has the power to enable organizational growth and change. Humility drives behaviors associated with learning…
Abstract
The presence and practice of individual and organizational humility has the power to enable organizational growth and change. Humility drives behaviors associated with learning and the ability to embrace the value of existing mental models while valuing the insights offered by new perspectives and approaches. This paradox-savvy practice, observed in humble individuals and organizations, allows them to appropriately value what is working about the existing system while simultaneously embracing the need for change. Our research finds humble behaviors emerging within psychologically safe environments that foster an attitude of inquiry, kinship, extraordinary collaboration, and professional excellence. Humble behaviors, at every organizational level, appear to enhance both individual and group capabilities that drive long term strategic advantage. Five capabilities were identified in our research: diverse networks, shared values, flexibility and adaptability, judgment and decision-making, and organizational learning. We bring these concepts to life by synthesizing established and emerging research, as well as diving deeply into an empirical case study that leverages humble practices in order to effectively drive organizational change. We argue that humility can impact organizing at all levels (individuals, leaders, followers, teams, executives, and organizations) and in so doing create the conditions in which sustainable organizational change can flourish.
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To explain how reading, rewinding a story in reverse order, and then rereading allows a reader to contextualize information, acquiring not only major themes and events but also…
Abstract
Purpose
To explain how reading, rewinding a story in reverse order, and then rereading allows a reader to contextualize information, acquiring not only major themes and events but also details and other literacy characteristics of the literature selection.
Design/methodology/approach
A representation of sequencing structures is discussed including world-related, concept-related, inquiry-related, learning-related, and utilization-related. In addition, the instructional design aspects of backwards sequencing are discussed.
Findings
Just as a level or stud finder uses a back-and-forth approach for finding the most suitable position, so does the backwards sequential approach to reading comprehension. By slowing down and focusing on parts before the whole, students are more likely comprehend content.
Practical implications
The importance of prediction towards comprehension has been recognized for decades. However, using a learning design that features reading a story once, then revisiting the story structure components in backwards order, and finally reading it again, allows for precise and complete learning. This theory has research and pedagogical implications for students of all ages.
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