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Article
Publication date: 6 March 2009

Aaron S. Brown and David F. Hardiman

The purpose of this paper is to provide an analysis on using two non‐conventional nonlinear estimating filters compared to the traditional linearized extended Kalman filter (EKF)…

446

Abstract

Purpose

The purpose of this paper is to provide an analysis on using two non‐conventional nonlinear estimating filters compared to the traditional linearized extended Kalman filter (EKF). This analysis will look at two state‐of‐the‐art applications and will provide insight to the problems associated with these applications.

Design/methodology/approach

The approach taken was to simulate both applications with three different filter designs: EKF, unscented Kalman filter, and particle filter. After results and explanations are given for both applications, then there is a comparison of results between the two applications to compare and contrast their findings.

Findings

This research shows how critical it is when selecting a filter for different applications. Not only is tuning the filter properly a necessity, but choosing a filter that is optimum for the application also greatly affects the accuracy and precision of the results.

Research limitations/implications

As these filter methods are proven feasible for these applications, testing can move beyond simulation. Further research could compare other nonlinear filters to these results to determine if a better estimation technique exists.

Practical implications

This paper shows a lot of the issues one must face when choosing an estimation technique for their application as well as the impact the technique can have on the outcome.

Originality/value

This paper clearly describes the decision‐making criteria in regards to these two specific applications. These two applications are current technological problems that many are trying to solve. This paper shows where and why errors in calculations occur. It also offers insight into different ways to solve these problems when the specific application is taken into account.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 28 no. 2
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 15 May 2007

Bert Spector and Henry Lane

Challenges the popular explanation for Enron's failure as being simply about financial reporting or criminal behavior and offers a more subtle and complex explanation.

4444

Abstract

Purpose

Challenges the popular explanation for Enron's failure as being simply about financial reporting or criminal behavior and offers a more subtle and complex explanation.

Design/methodology/approach

With a framework developed from the literature on cults and cult behavior as well as secondary research, the authors develop the perspective that Enron's senior leaders created an organization that encouraged executives to act in ways that were criminal. Five characteristics of cults: persuasion, isolation, elitism, charismatic (and dogmatic) leadership and wealth not benefiting group members were found to apply.

Findings

The major differences between a high performance organization and a cult were transparency, accountability and dialogue.

Practical implications

It highlights the small difference between a high performance culture and a cult and raises “red flags” or warning signs for executives to be aware of. Executives looking for long‐term outstanding performance through high levels of social cohesion and strong behavioral norms need to be aware of the cult trap.

Originality/value

There are important management lessons from the Enron story that transcend accounting and financial reporting techniques and lessons beyond the illegal behaviors. It provides an understanding of how an organization's culture and systems can lead to cult‐like behavior and encourage employees to act in illegal ways.

Details

Strategy & Leadership, vol. 35 no. 3
Type: Research Article
ISSN: 1087-8572

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Case study
Publication date: 24 April 2024

George (Yiorgos) Allayannis, Paul Tudor Jones and Aaron Fernstrom

The case describes a hypothetical hedge fund manager who is examining whether to invest in bitcoin. The case discusses potential risks and rewards of investing in bitcoin, the…

Abstract

The case describes a hypothetical hedge fund manager who is examining whether to invest in bitcoin. The case discusses potential risks and rewards of investing in bitcoin, the role of bitcoin and digital currencies more broadly, and financial innovation in the space, such as ICOs. It can be taught as part of a second-year MBA elective course in investments, financial institutions/capital markets, or fintech.

Details

Darden Business Publishing Cases, vol. no.
Type: Case Study
ISSN: 2474-7890
Published by: University of Virginia Darden School Foundation

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Book part
Publication date: 20 April 2022

Nancy Breen

David M. Gordon advanced labour economics with his theory of labour market segmentation, in which jobs rather than the marginal productivity of individual workers were the unit of

Abstract

David M. Gordon advanced labour economics with his theory of labour market segmentation, in which jobs rather than the marginal productivity of individual workers were the unit of analysis. He advanced economic historiography and macroeconomics by conceptualising social structures of accumulation – a framework built on the foundation of his institutionalist training and enriched by his study of Marxist economics. By appropriating methods from other social science disciplines into econometrics, he augmented empirical analysis in economics. He was a founding member of the Union of Radical Political Economics and its journal, the Review of Radical Political Economics – that advanced and promoted heterodox, radical, and Marxist economists in the United States. His contributions to economics, to organised labour, and to the New School for Social Research, where I studied with him, were stunning.

Part 1 lays out some context about the New School Graduate Faculty where Gordon taught. Part 2 explores what historical forces, including his family, led to his expansive creativity. Part 3 summarises how he expanded labour economics to include the relations as well as the technology of production, linked his understanding of the production process to a historical materialist view of labour in the United States, then extended that to econometric analyses of the US macroeconomy. Part 4 presents a bibliometric analysis to provide some idea of the impact of his work. I end with some concluding remarks.

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Book part
Publication date: 22 February 2017

Decoteau J. Irby

In this chapter, I present narratives of two Black men who represent a population of people who are often talked about but seldom heard from in school-to-prison pipeline research…

Abstract

In this chapter, I present narratives of two Black men who represent a population of people who are often talked about but seldom heard from in school-to-prison pipeline research. To analyze their stories, I employed a framework that centers on understanding human dignity and the conditions, circumstances, and experiences that threatened it. I found that their sense of self was eroded by moments of personal loss, disposal, and ways that even well-intentioned people marked them as “problems.” I explore how their eroded sense of self led them to engage in disruptive and destructive behaviors. I conclude by discussing the importance of supplementing school-to-prison pipeline research with Black boys’ and men’s first-hand accounts of their own experiences as a way of humanizing the primary subjects of this burgeoning area of education research.

Details

The School to Prison Pipeline: The Role of Culture and Discipline in School
Type: Book
ISBN: 978-1-78560-128-6

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Article
Publication date: 15 July 2019

Gregory A. Aarons, Rachel A. Askew, Amy E. Green, Alexis J. Yalon, Kendal Reeder and Lawrence A. Palinkas

The purpose of this paper is twofold: first, to identify the types of adaptations made by service providers (i.e. practitioners) during a large-scale US statewide implementation…

270

Abstract

Purpose

The purpose of this paper is twofold: first, to identify the types of adaptations made by service providers (i.e. practitioners) during a large-scale US statewide implementation of SafeCare®, an evidence-based intervention to reduce child neglect; and second, to place adaptations within a taxonomy of types of adaptations.

Design/methodology/approach

Semi-structured interviews and focus groups were conducted with 138 SafeCare providers and supervisors. Grounded theory methods were used to identify themes, specific types of adaptations and factors associated with adaptation.

Findings

Adaptations were made to both peripheral and core elements of the evidence-based practice (EBP). The taxonomy of adaptations included two broad categories of process and content. Process adaptations included presentation of materials, dosage/intensity of sessions, order of presentation, addressing urgent concerns before focusing on the EBP and supplementing information to model materials. Content adaptations included excluding parts of the EBP and overemphasizing certain aspects of the EBP. Adaptations were motivated by client factors such as the age of the target child, provider factors such as a providers’ level of self-efficacy with the EBP and concerns over client/provider rapport. Client factors were paramount in motivating adaptations of all kinds.

Research limitations/implications

The present findings highlight the need to examine ways in which adaptations affect EBP implementation and sustainment, client engagement in treatment, and client outcomes.

Practical implications

Implementers and EBP developers and trainers should build flexibility into their models while safeguarding core intervention elements that drive positive client outcomes.

Originality/value

This study is unique in examining and enumerating both process and content types of adaptations in a large-scale child neglect implementation study. In addition, such adaptations may be generalizable to other types of EBPs.

Details

Journal of Children's Services, vol. 14 no. 2
Type: Research Article
ISSN: 1746-6660

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Article
Publication date: 18 January 2019

Dinara Mukhamejanova

Kazakhstan has taken considerable steps to improve the incoming mobility of international students; however, despite these measures, the number of international students studying…

521

Abstract

Purpose

Kazakhstan has taken considerable steps to improve the incoming mobility of international students; however, despite these measures, the number of international students studying in Kazakhstan is still very low. Research indicates that in order to attract and retain international students it is necessary to build a thorough understanding of their experiences in the host country. The purpose of this paper is to gain a better understanding of international students’ experiences in Kazakhstan by exploring how they exercise their human agency while adapting to the academic and socio-cultural life in Kazakhstan.

Design/methodology/approach

The author used a purposeful criterion sampling to select six international students from Afghanistan, Great Britain, Russia, South Korea, Ukraine and the USA studying at Kazakhstani universities to participate in this research. The primary data collection was semi-structured in-depth interviews. Supportive methods included a demographic questionnaire and a researcher journal.

Findings

The study revealed that the international students actively employed their human agency to negotiate their studying and to adapt to their life in Kazakhstan. They did not simply adjust to the host environment, but also learned from it and attempted to transform it according to their circumstances and goals.

Research limitations/implications

The implication is that Kazakhstani universities and any other higher education institutions that seek to increase the number of their international students should consider not only how to attract these students, but also how to adapt their institution’s practices and regulations to create an inclusive learning environment for their diverse student population. It is also very important for higher education institutions to provide international students with the necessary conditions to exercise their human agency because as it was revealed by this study, international students’ human agency is a very powerful mechanism helping them live and learn comfortably in their host country.

Originality/value

Taking into consideration the reviewed previous research, this was the first attempt to use Albert Bandura’s social cognitive theory for the purpose of building an understanding about how international students exercise their agency while adapting to the academic and socio-cultural life in the host country. The social cognitive theory allows investigating international students as active and self-sufficient agents of their own adaptation process who can and do change themselves, and have the potential to navigate and alter their host environment to achieve their own goals. This study encourages researchers and practitioners to think about international students outside the dimension of internationalization as a means of improving country’s economic capital.

Details

International Journal of Comparative Education and Development, vol. 21 no. 3
Type: Research Article
ISSN: 2396-7404

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Article
Publication date: 12 June 2020

Angeliki Kallitsoglou

Despite their documented benefits, evidence-based practices (EBPs) for early childhood social learning are not systematically implemented. Teachers are key players in the…

694

Abstract

Purpose

Despite their documented benefits, evidence-based practices (EBPs) for early childhood social learning are not systematically implemented. Teachers are key players in the implementation process of intervention programs and instructional practices. This is a viewpoint about teachers’ attitudes towards EBPs and their role in the successful implementation of EBPs for early childhood social learning.

Design/methodology/approach

The viewpoint draws on theoretical models of intervention implementation and innovation adoption to explore the importance of individual factors for EBPs implementation and to inform the understanding of the relationship between teachers’ attitudes and EBPs implementation in the context of early childhood social learning. Additionally, it is informed by the literature on research-informed teaching to identify novel opportunities of cultivating positive views towards EBPs for early childhood social learning.

Findings

According to implementation science, in addition to macro-level social and organisation factors, micro-level individual factors that pertain to professionals’ attitudes towards EBPs are related to successful adoption and implementation of EBPs in organisations. Hence, it is important that the investigation of the adoption and implementation of EBPs for early childhood social learning considers the role of teachers’ attitudes towards EBPs. A conceptual model is proposed to explain that research-informed teaching could contribute to fostering positive attitudes towards EBPs for early childhood social learning by raising awareness of the value and potential of research to transform pedagogy.

Originality/value

This viewpoint draws on EBPs implementation science to identify important factors of EBPs adoption and implementation for early childhood social learning that have not been considered extensively and offers a conceptual framework to help understand how research-informed teaching could be an innovative avenue of promoting EBPs implementation in education.

Details

Journal of Children's Services, vol. 15 no. 2
Type: Research Article
ISSN: 1746-6660

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Article
Publication date: 19 August 2019

Rebecca Lengnick-Hall, Karissa Fenwick, Michael S. Hurlburt, Amy Green, Rachel A. Askew and Gregory A. Aarons

Researchers suggest that adaptation should be a planned process, with practitioners actively consulting with program developers or academic partners, but few studies have examined…

194

Abstract

Purpose

Researchers suggest that adaptation should be a planned process, with practitioners actively consulting with program developers or academic partners, but few studies have examined how adaptation unfolds during evidence-based practice (EBP) implementation. The purpose of this paper is to describe real-world adaptation discussions and the conditions under which they occurred during the implementation of a new practice across multiple county child welfare systems.

Design/methodology/approach

This study qualitatively examines 127 meeting notes to understand how implementers and researchers talk about adaptation during the implementation of SafeCare, an EBP aimed at reducing child maltreatment and neglect.

Findings

Several types of adaptation discussions emerged. First, because it appeared difficult to get staff to talk about adaptation in group settings, meeting participants discussed factors that hindered adaptation conversations. Next, they discussed types of adaptations that they made or would like to make. Finally, they discussed adaptation as a normal part of SafeCare implementation.

Research limitations/implications

Limitations include data collection by a single research team member and focus on a particular EBP. However, this study provides new insight into how stakeholders naturally discuss adaptation needs, ideas and concerns.

Practical implications

Understanding adaptation discussions can help managers engage frontline staff who are using newly implemented EBPs, identify adaptation needs and solutions, and proactively support individuals who are balancing adaptation and fidelity during implementation.

Originality/value

This study’s unique data captured in vivo interactions that occurred at various time points during the implementation of an EBP rather than drawing upon data collected from more scripted and cross-sectional formats. Multiple child welfare and implementation stakeholders and types of interactions were examined.

Details

Journal of Children's Services, vol. 14 no. 4
Type: Research Article
ISSN: 1746-6660

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Article
Publication date: 1 December 2020

Gregory A. Aarons, Kate L. Conover, Mark G. Ehrhart, Elisa M. Torres and Kendal Reeder

Clinician turnover in mental health settings impacts service quality, including availability and delivery of evidence-based practices. Leadership is associated with organizational…

753

Abstract

Purpose

Clinician turnover in mental health settings impacts service quality, including availability and delivery of evidence-based practices. Leadership is associated with organizational climate, team functioning and clinician turnover intentions (TI). This study examines leader–member exchange (LMX), reflecting the relationship between a supervisor and each supervisee, using mean team LMX, dispersion of individual clinician ratings compared to team members (i.e. relative LMX) and team level variability (i.e. LMX differentiation), in relation to organizational climate and clinician TI.

Design/methodology/approach

Survey data were collected from 363 clinicians, nested in children's mental health agency workgroups, providing county-contracted outpatient services to youth and families. A moderated mediation path analysis examined cross-level associations of leader–member exchange with organizational climate and turnover intentions.

Findings

Lower relative LMX and greater LMX differentiation were associated with higher clinician TI. Higher team-level demoralizing climate also predicted higher TI. These findings indicate that poorer LMX and more variability in LMX at the team level are related to clinician TI.

Originality/value

This study describes both team- and clinician-level factors on clinician TI. Few studies have examined LMX in mental health, and fewer still have examined relative LMX and LMX differentiation associations with organizational climate and TI. These findings highlight the importance of leader–follower relationships and organizational climate and their associations with clinician TIs. Mental health service systems and organizations can address these issues through fostering more positive supervisor–supervisee relationships.

Details

Journal of Health Organization and Management, vol. 35 no. 1
Type: Research Article
ISSN: 1477-7266

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