Hauke Huisinga and Lutz Hofmann
Efficient calculations of the transient behaviour after disturbances of large-scale power systems are complex because of, among other things, the non-linearity and the stiffness…
Abstract
Purpose
Efficient calculations of the transient behaviour after disturbances of large-scale power systems are complex because of, among other things, the non-linearity and the stiffness of the overall state equation system (SES). Because of the rising amount of flexible transmission system elements, there is an increasing need for reduced order models with a negligible loss of accuracy. With the Extended Nodal Approach and the application of the singular perturbation method, it is possible to reduce the order of the SES adapted to the respective setting of the desired tasks and accuracy requirements.
Design/methodology/approach
Based on a differential-algebraic equation for the electric power system which is formulated with the Extended Nodal Approach, the automatic decomposition into reduced order models is shown in this paper. The paper investigates the effects of different coordinate systems for an automatic order reduction with the singular perturbation method, as well as a comparison of results calculated with the full and reduced order models.
Findings
The eigenvalues of the full system are approximated sufficiently by the three subsystems. A simulation example demonstrates the good agreement between the reduced order models and the full model independent of the choice of the coordinate system. The decomposed subsystems in rotating coordinates have benefits as compared to those in static coordinates.
Originality/value
The paper presents a systematic decomposition based only on a differential-algebraic equation system of the electric power system into three subsystems.
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Stephane Timmer and Lutz Kaufmann
The purpose of this paper is to investigate legal effects on social sustainability practices at buying firms. The US Dodd-Frank Act has forced listed companies to determine the…
Abstract
Purpose
The purpose of this paper is to investigate legal effects on social sustainability practices at buying firms. The US Dodd-Frank Act has forced listed companies to determine the degree to which their products contain conflict minerals (CM). The research question this study seeks to answer is the following: which factors influence a company’s ability to determine the provenance of its inputs?
Design/methodology/approach
The study examines secondary data in the form of CM reports of 50 US listed firms for two consecutive years using a fuzzy set qualitative comparative analysis (fsQCA) approach.
Findings
This study identifies different configurations of stakeholder salience and firm resources that lead individual companies to achieve high levels of traceability. Findings show that firms’ CM governance mechanisms are a key determinant in the firms’ capacity to meet regulatory traceability requirements. Further, the authors find that both the presence and absence of specific stakeholder pressures and firm resources can lead to traceability. Findings also suggest that firms can achieve traceability without any pressure from stakeholders.
Research limitations/implications
The study investigates the practices of individual firms that are subject to the Dodd-Frank Act, rather than adopting a supply chain-wide perspective. Further, proxies had to be used to measure several constructs because of reliance on firms’ reporting, which implies that the study did not account for certain behavioral factors that influence traceability.
Practical implications
This study provides managers of both resource-rich and less resource-rich firms with possible pathways for achieving CM traceability.
Originality/value
The study contributes to the field of sustainability by providing exploratory insights into the antecedents of traceability and deriving theoretical propositions to guide further research. The authors apply fsQCA to investigate secondary data over multiple years, thus using a novel configurational methodology.
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The purpose of this paper is to introduce librarians, faculty, and other interested individuals to contemporary German literature in English translation.
Abstract
Purpose
The purpose of this paper is to introduce librarians, faculty, and other interested individuals to contemporary German literature in English translation.
Design/methodology/approach
German‐language authors born in 1950 or later and listed on the Contemporary Living Authors Comprehensive List developed by the German vendor Otto Harrassowitz are searched in OCLC's WorldCat database to determine the existence of English translations. A bio‐bibliographical list is then developed featuring all contemporary German‐language authors who have achieved an English language translation of at least one of their literary works.
Findings
Of the approximately 1,400 writers on Harrassowitz's comprehensive list, a surprisingly large number of almost 80 authors of the younger generation (born in 1950 or later) have been translated into English.
Originality/value
This bio‐bibliography of contemporary German belles lettres (of the younger generation) in English translation is the first of its kind. It can be used by librarians to check their current library holdings and to expand their collections of German literature in English translation.
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The purpose of this paper is to describe the emergence of school-based, secular, mindfulness-based interventions (MBIs) for educators and students that aim to cultivate…
Abstract
Purpose
The purpose of this paper is to describe the emergence of school-based, secular, mindfulness-based interventions (MBIs) for educators and students that aim to cultivate mindfulness and its putative benefits for teaching, learning, and well-being.
Design/methodology/approach
The paper has four sections: (a) a description of indicators of increased interest in mindfulness generally and in education; (b) substantive and functional definitions of mindfulness; (c) rationales for the potential value of mindfulness for teaching, learning, and well-being; and (d) a review of extant research on MBIs for teachers and students in schools.
Findings
On the basis of this review, it is concluded that school-based MBIs represent a promising emerging approach to enhancing teaching, learning, and well-being in schools; but that more research, with more rigorous study designs and measures, need to be done to establish the scientific validity of the effects of school-based MBIs for teachers and students alike.
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Carmen Valor, Carlos Martínez-de-Ibarreta, Isabel Carrero and Amparo Merino
Brief loving-kindness meditation (LKM) is introduced here as a valid social marketing intervention. LKM positively influences prosocial cognitions and affects. However, it remains…
Abstract
Purpose
Brief loving-kindness meditation (LKM) is introduced here as a valid social marketing intervention. LKM positively influences prosocial cognitions and affects. However, it remains unclear whether brief meditation interventions can influence prosocial behavior. This study aims to provide evidence of the effects of short LKM on prosocial behavior.
Design/methodology/approach
This study reports the results of three experiments examining the effects of brief LKM on donations to unknown others. The results are then integrated with the results of seven other studies testing the effects of brief LKM on prosocial behavior using a meta-analysis (n = 683).
Findings
LKM increased love more than the control group (focused breathing) in the three experiments; however, its effects on donations were mixed. The meta-analysis shows that LKM has a small-to-medium significant effect compared to active control groups (d = 0.303); moreover, age and type of prosocial measure used moderate the effects.
Originality/value
Results suggest that LKM can nurture prosocial emotions such as love and lead young individuals to donate. However, these emotions may not be sufficient to lead adult meditators to share their resources with unknown others. This study presents the first meta-analysis of brief LKM and provides insights into the use of meditation in social marketing programs.
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Nobody concerned with political economy can neglect the history of economic doctrines. Structural changes in the economy and society influence economic thinking and, conversely…
Abstract
Nobody concerned with political economy can neglect the history of economic doctrines. Structural changes in the economy and society influence economic thinking and, conversely, innovative thought structures and attitudes have almost always forced economic institutions and modes of behaviour to adjust. We learn from the history of economic doctrines how a particular theory emerged and whether, and in which environment, it could take root. We can see how a school evolves out of a common methodological perception and similar techniques of analysis, and how it has to establish itself. The interaction between unresolved problems on the one hand, and the search for better solutions or explanations on the other, leads to a change in paradigma and to the formation of new lines of reasoning. As long as the real world is subject to progress and change scientific search for explanation must out of necessity continue.
Angeline Villanueva Yang, Marilee Bresciani Ludvik, Caren L. Sax, Sylvia Garcia-Navarrete, Wendy Bracken, J. Luke Wood and Charles Iyoho
The purpose of this paper is to explore whether attention, emotion, and cognitive regulation (CR) may be strategies to advance one’s ethnic identity.
Abstract
Purpose
The purpose of this paper is to explore whether attention, emotion, and cognitive regulation (CR) may be strategies to advance one’s ethnic identity.
Design/methodology/approach
The paper is presented in three parts. The first section discusses integrative inquiry (INIQ) (Bresciani Ludvik et al., 2016), a mindfulness methodology and mindful inquiry training program, as a potential pathway to help mitigate stress and enhance healthy development and well-being strategies that combat stressors related to ethnic and racial identity; and increase opportunities for positive ethnic identity development. INIQ was designed to influence areas of the brain associated with attention regulation, emotion regulation, and CR in order to decrease stress and anxiety, and heighten executive functions of undergraduate and graduate students. The second section discusses an exploratory study to see whether INIQ resulted in higher mean scores for participants on their ethnic identity, as assessed by the multigroup ethnic identity measure (Phinney, 1992).
Findings
The results indicated that there was a significant increase in pre-test and post-test scores for mindfulness (p=0.001) as well as the dependent measure for learning exploration (p=0.028) among 30 undergraduate, master’s- and doctoral-seeking students. There was also a non-significant increase for clear understanding (p=0.15) and overall ethnic identity achievement (p=0.387); and non-significant decrease for ethnic belonging (p=0.424).
Originality/value
These findings suggest that INIQ may increase students’ ethnic learning exploration, which is an important process in ethnic identity development (Phinney and Ong, 2007). This study also suggests that INIQ increases mindfulness in participants. The authors conclude with a discussion and recommendations to future INIQ and other diversity centered student support practitioners interested in influencing positive ethnic identity formation.
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Kimberly Key, Teresa Lightner and Bing Luo
This study investigates the relation between residential property values and both property taxes and public services in Georgia’s counties. Capitalization theory predicts that…
Abstract
This study investigates the relation between residential property values and both property taxes and public services in Georgia’s counties. Capitalization theory predicts that property values relate negatively to property taxes, and positively to public services. Palmon and Smith (1998) state that errors in public service measures create a capitalization coefficient bias that makes it difficult to isolate tax effects from public service effects. This paper is a first step in defining and quantifying public services and their marginal effect on housing values. It develops public service measures in four quality-of-life areas – economy, education, health, and public safety. The models suggest a strong negative relation between effective tax rates and property values, and a significant positive association between the public service measures and property values. Analyses indicate that property taxes are capitalized into housing prices at greater than 100%, suggesting prior underestimations based on measurement errors in public service variables.
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Despite the growing importance and complexity of modern supply chains, little scholarly attention has been devoted to cognitive processes in supply chain management (SCM). In…
Abstract
Purpose
Despite the growing importance and complexity of modern supply chains, little scholarly attention has been devoted to cognitive processes in supply chain management (SCM). In particular, we know little about the structure of supply chain managers’ cognitive frames and how differences between frames affect sustainable supply chain management (SSCM).
Design/methodology/approach
Given the relative scarcity of the topic, this paper uses a conceptual approach. Building on prior literature from cognitive psychology and related areas, it develops ideal types of cognitive frames with which supply chain managers approach sustainability-related decisions.
Findings
This study first develops three ideal-type cognitive frames – unidimensional, hierarchical and paradoxical. This paper then shows that it makes a difference which one of these a supply chain manager holds when addressing issues related to sustainable supply. Thereafter, this study discusses the antecedents that can explain why a manager holds a particular cognitive frame.
Research limitations/implications
This paper represents one of the first analyses of how the structure of a supply chain manager’s cognitive frame impacts their firm’s sustainable supply initiatives. Although developed with regard to SSCM, the arguments have implications for other management areas too, not least for the education of future SCM professionals.
Originality/value
Given their boundary-spanning role, attention to the cognitive processes of supply chain managers is crucial to understanding the conditions under which firms can address sustainability challenges in their supply chains.