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Article
Publication date: 9 September 2013

Alexander Sommer, Ortwin Farle and Romanus Dyczij-Edlinger

The article aims to present an efficient numerical method for computing the far-fields of phased antenna arrays over broad frequency bands as well as wide ranges of steering and…

139

Abstract

Purpose

The article aims to present an efficient numerical method for computing the far-fields of phased antenna arrays over broad frequency bands as well as wide ranges of steering and look angles.

Design/methodology/approach

The suggested approach combines finite-element analysis, projection-based model-order reduction, and empirical interpolation.

Findings

The reduced-order models are highly accurate but significantly smaller than the underlying finite-element models. Thus, they enable a highly efficient numerical far-field computation of phased antenna arrays. The frequency-slicing greedy method proposed in this paper greatly reduces the computational costs for constructing the reduced-order models, compared to state-of-the-art methods.

Research limitations/implications

The frequency-slicing greedy method is intended for use with matrix factorization methods. It is not applicable when the underlying finite-element system is solved by iterative methods.

Practical implications

In contrast to conventional finite-element models of phased antenna arrays, reduced-order models are very cheap to evaluate. Hence, they provide an enabling technology for computing radiation patterns over broad frequency bands and wide ranges of steering angles.

Originality/value

The paper presents a two-step model-order reduction method for efficiently computing the far-field patterns of phased antenna arrays. The suggested frequency-slicing greedy method constructs the reduced-order models in a systematic fashion and improves computing times, compared to existing methods.

Details

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, vol. 32 no. 5
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 30 March 2012

Rene Mayrhofer, Alexander Sommer and Sinan Saral

Spatial messaging is a direct extension to text and other multi‐media messaging services that have become highly popular with the current pervasiveness of mobile communication. It…

282

Abstract

Purpose

Spatial messaging is a direct extension to text and other multi‐media messaging services that have become highly popular with the current pervasiveness of mobile communication. It offers benefits especially to mobile computing, providing localized and therefore potentially more appropriate delivery of nearly arbitrary content. Location is one of the most interesting attributes that can be added to messages in current applications, including gaming, social networking, or advertising services. However, location is also highly critical in terms of privacy. If a spatial messaging platform could collect the location traces of all its users, detailed profiling would be possible – and, considering commercial value of such profiles, likely. The purpose of this paper is to present Air‐Writing, an approach to spatial messaging that fully preserves user privacy while offering global scalability, different client interface options, and flexibility in terms of application areas.

Design/methodology/approach

The authors contribute both an architecture and a specific implementation of an attribute‐based messaging platform with special support for spatial messaging and rich clients for J2ME, Google Android, and Apple iPhone. The centralized client/server approach utilizes groups for anonymous message retrieval and client caching and filtering, as well as randomized queries for obscuring traces.

Findings

Two user studies with 26 users show that the overall concept is easily understandable and that it seems useful to end‐users. An analysis of real‐world and simulated location traces shows that user privacy can be ensured, but with a trade‐off between privacy protection and consumed network resources.

Practical implications

Air‐Writing, both as an architectural concept and as a specific implementation, are immediately applicable to practical, globally scalable, private group messaging systems. A publicly available messaging platform is already online as beta version at http://airwriting.com Originality/value – Air‐Writing addresses three concerns: flexibility concerning arbitrary messaging applications, user privacy, and global scalability of the associated web service. To the best of the authors' knowledge, previous approaches focus on at most two of these issues, while the authors' approach allows all three requirements to be fulfilled.

Details

International Journal of Pervasive Computing and Communications, vol. 8 no. 1
Type: Research Article
ISSN: 1742-7371

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Article
Publication date: 8 May 2009

C. Kenneth Tanner

The purpose of this study is to compare student achievement with three school design classifications: movement and circulation, day lighting, and views.

8055

Abstract

Purpose

The purpose of this study is to compare student achievement with three school design classifications: movement and circulation, day lighting, and views.

Design/methodology/approach

From a sample of 71 schools, measures of these three school designs, taken with a ten‐point Likert scale, are compared to students' outcomes defined by six parts of the Iowa Test of Basic Skills (ITBS): Reading comprehension, Reading vocabulary, Language arts, Mathematics, Social studies, and Science. Data are tested through reduced regression analysis, where the difference between R2 of the reduced regression is compared to the R2 of the full regression. This result, in each case, is defined as the effect of the school's physical environment on students' outcomes represented by achievement scores on the ITBS.

Findings

Significant effects are found for Reading vocabulary, Reading comprehension, Language arts, Mathematics, and Science.

Practical implications

The study's findings regarding movement and circulation patterns, natural light, and classrooms with views have implications for designing new schools or modifying existing structures. They are especially important to school leaders, educational planners, and architects who engage in programming for educational facilities.

Originality/value

This study is part of original research efforts at the University of Georgia, USA. Since 1997, the focus of research in the University of Georgia's School Design and Planning Laboratory (SDPL) has been the measurement of the impact of the school's physical environment on aspects of affective, behavioral, and cognitive learning. All SDPL research has been quantitative in nature, where measures of the physical environment were compared to measures of student outcomes. There are two immediate values to these studies: educational leaders may use the findings to assess their existing school facilities and determine where improvements will have the greatest impact, or planners may use the findings to guide architects in the design and construction of new educational facilities.

Details

Journal of Educational Administration, vol. 47 no. 3
Type: Research Article
ISSN: 0957-8234

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Article
Publication date: 2 February 2015

Alexander Buhmann and Diana Ingenhoff

The purpose of this paper is to develop and test a new model for the measurement of the constitution and effects of the country image as a central target construct in…

2762

Abstract

Purpose

The purpose of this paper is to develop and test a new model for the measurement of the constitution and effects of the country image as a central target construct in international public relations.

Design/methodology/approach

The authors combine concepts from reputation management (Eisenegger and Imhof, 2008; Ingenhoff and Sommer, 2007), national identity theory (Smith, 1987), and attitude theory (Ajzen and Fishbein, 1980) to derive a four-dimensional model, conceptualizing country images as stakeholder attitudes toward a nation and its state, comprising specific beliefs and general feelings in a functional, normative, aesthetic, and emotional dimension. Furthermore, the authors develop a path model to analyze the country image’s effect on stakeholder behavior. This model is operationalized and tested in a survey regarding the country image of the USA and its effects on travel behavior.

Findings

Results show how functional, normative and aesthetic image dimensions vary in affecting the formation of the affective image component. It is also demonstrated how the affective image di-mension acts as a mediator in the image’s effect on stakeholder behavior.

Practical implications

For international public relations and public diplomacy practice the developed model supplies a new approach for country image analyses which will serve and improve the development and evaluation of cross-national communication strategies.

Originality/value

The paper introduces a new theory-grounded approach to clarify the dimensionality of the country image construct. It is the first to operationalize cognitive and affective dimensions of the country image by combining formative and reflective indicators in a mixed specified construct.

Details

Journal of Communication Management, vol. 19 no. 1
Type: Research Article
ISSN: 1363-254X

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Article
Publication date: 1 March 1985

Tomas Riha

Nobody concerned with political economy can neglect the history of economic doctrines. Structural changes in the economy and society influence economic thinking and, conversely…

2717

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.

Details

International Journal of Social Economics, vol. 12 no. 3/4/5
Type: Research Article
ISSN: 0306-8293

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Book part
Publication date: 25 May 2017

Nicholas J. Chagnon

This chapter draws on feminist theorizing on rape culture and victim blaming, and proposes a concept, racialized victim blaming, as a useful tool for understanding discourse on…

Abstract

Purpose

This chapter draws on feminist theorizing on rape culture and victim blaming, and proposes a concept, racialized victim blaming, as a useful tool for understanding discourse on state violence.

Methodology/approach

The concept of racialized victim blaming is applied to historically analyze the genesis of the carceral state, and deconstruct public debates on police shootings and immigration crises.

Findings

This chapter argues that racialized victim blaming is used as a discursive tool to legitimize and mystify state violence projects. Officials and the media use racialized logics and narratives to blame the victims of state violence for their own suffering, justifying continued or increased state violence.

Originality/value

The concept of victim blaming is most often associated with violence against women. Here I demonstrate that victim blaming is also a useful tool for understanding state violence, particularly when attention is given to the place of racializing narratives.

Details

Race, Ethnicity and Law
Type: Book
ISBN: 978-1-78714-604-4

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Article
Publication date: 1 February 1998

Rocco R. Vanasco

This paper examines the role of professional associations, governmental agencies, and international accounting and auditing bodies in promulgating standards to deter and detect…

27719

Abstract

This paper examines the role of professional associations, governmental agencies, and international accounting and auditing bodies in promulgating standards to deter and detect fraud, domestically and abroad. Specifically, it focuses on the role played by the US Securities and Exchange Commission (SEC), the American Institute of Certified Public Accountants (AICPA), the Institute of Internal Auditors (IIA), the Institute of Management Accountants (IMA), the Association of Certified Fraud Examiners (ACFE), the US Government Accounting Office (GAO), and other national and foreign professional associations, in promulgating auditing standards and procedures to prevent fraud in financial statements and other white‐collar crimes. It also examines several fraud cases and the impact of management and employee fraud on the various business sectors such as insurance, banking, health care, and manufacturing, as well as the role of management, the boards of directors, the audit committees, auditors, and fraud examiners and their liability in the fraud prevention and investigation.

Details

Managerial Auditing Journal, vol. 13 no. 1
Type: Research Article
ISSN: 0268-6902

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Article
Publication date: 29 November 2023

Neha Pandey, Sudarsan Desul, Raj Kishore Patra and Mrutyunjay Sethy

Menstruation poses psycho-physiological challenges globally due to a lack of awareness, unhygienic practices and social stigma. This paper aims to assess the existing body of…

124

Abstract

Purpose

Menstruation poses psycho-physiological challenges globally due to a lack of awareness, unhygienic practices and social stigma. This paper aims to assess the existing body of research on menstrual health and hygiene (MHH) worldwide.

Design/methodology/approach

This study focuses on seminal works published in the Scopus Database from 1946 to 2023 for extensive bibliometric analysis, involving 756 bibliographic records analyzed through Biblioshiny and VOSviewer software. The authors use thematic analysis to identify core research themes and sub-themes, coupled with a critical review of the most highly cited articles within each thematic category.

Findings

The research into MHH has consistently grown since 2010, with a notable surge in the past five years. Among all countries, the USA emerges as the most active contributor, boasting the highest number of publications and citations. In terms of organizations, The London School of Hygiene and Tropical Medicine takes the lead with 54 articles. Further, PLOS ONE and Waterlines were the most productive and influential journals, respectively. The thematic analysis identifies key research foci, including tampons, menstrual health, sanitation, hygiene and bleeding.

Research limitations/implications

Further research could be initiated in areas of menstrual education and awareness, menstrual product safety and effectiveness and menstrual disorders and treatments to address the concerns especially encountered by women from developing countries.

Originality/value

This research provides a comprehensive analysis of 77 years of MHH research, offering valuable insights into key areas of concern and guiding future research directions, ultimately addressing critical global health challenges.

Details

Global Knowledge, Memory and Communication, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2514-9342

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Book part
Publication date: 3 March 2016

Kate B. Hilton and Ruth Wageman

This chapter explores distributed leadership in volunteer multistakeholder groups tackling complex problems, focusing on community organizing practices to bridge the gap between…

Abstract

This chapter explores distributed leadership in volunteer multistakeholder groups tackling complex problems, focusing on community organizing practices to bridge the gap between health and health care in Columbia, South Carolina. Columbia faces increasing chronic disease, high rates of uninsured, unequal access to healthcare services, and rising costs. Regional leaders periodically tackled these problems together but faced challenges common to multistakeholder groups. In 2010, leaders from Columbia partnered with the authors in a learning enterprise to find new, more sustainable ways to address these challenges. Together we adapted a community organizing approach to develop distributed leadership skills necessary to overcome the challenges of volunteer multistakeholder groups and transform the health system in a local area. In the first year, teams provided health screenings to over 1,000 residents; over 3,000 residents exercised leadership to improve community health; over 5,000 residents pledged to improve their health. Clinic hours were extended; new health coaches focused on primary care and wellness programs. Providers and payers committed to reinvesting a share of savings in the community, which has a voice in their use. We show that developing distributed leadership via community organizing offers an approach to solving seemingly intractable community problems.

Details

Leadership Lessons from Compelling Contexts
Type: Book
ISBN: 978-1-78560-942-8

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Book part
Publication date: 24 April 2019

Kerry Bissaker, Sue Kupke, Divya Dawadi, Kamal Pokhrel, Vanessa Alexander, Jo Shearer, Helen Stephenson, Lesley Henderson and Ali Nawab

Uncertainty, overwhelmed, doubtful, anxious … and so the list of emotions of the doctoral candidate goes on. Yet, we can move from not just surviving emotional and cognitive…

Abstract

Uncertainty, overwhelmed, doubtful, anxious … and so the list of emotions of the doctoral candidate goes on. Yet, we can move from not just surviving emotional and cognitive challenges to thriving and embracing the challenges through the creation of a support network. While family and friends might be one supportive network, they often fail to understand the lived experience of doctoral research, so it is critical to establish a professional network early in the candidature. This may form naturally if you are researching within a laboratory setting, but for many doctoral candidates engaged in social science research, finding a place in a professional network may not be straightforward. In this chapter, co-written by doctoral students and their supervisor, the processes and power of creating a network are shared and explored in the hope of supporting others to achieve the same. The chapter presents ideas for creating or finding a place in a network but more importantly for recognizing the power of the network to ensure successful outcomes beyond the completion of the thesis. While completion of the thesis is a primary aim of the doctoral candidature, we argue the quality of the candidature experience can shape the future of the graduate and subsequently the next generation of academics.

Details

Getting the Most Out of Your Doctorate
Type: Book
ISBN: 978-1-78769-905-2

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