Search results

1 – 10 of 725
Article
Publication date: 9 November 2012

Ademola O. Kaka, Mehmet Toycan, Vali Bashiry and Stuart D. Walker

The purpose of this paper is to describe a modified Hilbert‐based fractal antenna for ultra wideband (UWB) wireless applications. Simulation results show excellent multi‐band…

Abstract

Purpose

The purpose of this paper is to describe a modified Hilbert‐based fractal antenna for ultra wideband (UWB) wireless applications. Simulation results show excellent multi‐band characteristics for UWB wireless applications.

Design/methodology/approach

A Hilbert curve‐based fractal is optimised for self‐replicating, space‐filling and self‐avoiding properties. In the proposed design, the Hilbert curve is applied to a rectangle as an initial iteration and maintained for the later iterations. Additionally, a Yagi‐like strip is removed from the second iteration of the Hilbert patch and a hexagonal portion is removed from the substrate to achieve good optimization. The antenna feed is created through a micro‐strip line with a feeding section. Finally, a partial ground plane technique is used for improved impedance matching characteristics. A finite element method (FEM) is used to simulate the modified Hilbert model with commercially available Ansoft HFSS software.

Findings

The proposed antenna is miniaturized (39 mm length×30 mm width) and has multi‐band characteristics. The simulation results show that the antenna has a reflection coefficient characteristic of <−10 dB, a linear phase reflection coefficient, better than 65 percent radiation efficiency, 2.2‐4 dBi antenna gain and nearly omni‐directional radiation pattern properties over the UWB bandwidth (3.1‐10.6 GHz).

Originality/value

The antenna shows promising characteristics for the full 7.5 GHz UWB bandwidth. In addition, the performance is achieved by using laceration techniques on the Hilbert patch and substrate, respectively. A partial ground plane ensures impedance matching of 50 over full UWB bandwidth. The simulation analysis of the modified Hilbert fractal antenna design constitutes the main contribution of the paper.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 31 no. 6
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 23 August 2011

Mark Van Hoorebeek, Chris Gale and Stuart Walker

As the predicted escalation in the litigation becomes a reality for universities in the UK, increasing importance is placed on the consideration given to the integrity of…

403

Abstract

Purpose

As the predicted escalation in the litigation becomes a reality for universities in the UK, increasing importance is placed on the consideration given to the integrity of institutional protocols regulating decision making at all stages of student progression. The purpose of this paper is to outline the structures that are in place to provide an analysis of the issues that arise when these protocols are activated.

Design/methodology/approach

This paper first, provides a brief yet accessible overview of the literature concerning the institutions involved in student appeal, second, explains the principles that should be applied when using and analysing university protocols, third, analyses the role that mediation can play within the sector, and finally, discusses the disability dimension within a complaints context.

Findings

It can be seen that disputes between student and institution are on the rise for a number of reasons, be it finance, complexity of legislation or otherwise. The robust nature of what the office of the independent adjudicator (OIA) does seems evident from the lack of successful challenge by way of judicial review, even though the process has been held to be reviewable in a limited way at least. Perhaps this will give some reassurance to the aggrieved student that their version of events will be heard and judged fairly, but the overwhelming message to institutions must be to address potential issues early by means of well drafted protocols, management of student expectation and possibly the establishment of some sort of campus ombudsman which may help deter, deflect or even solve disputes. The role of the OIA seems here to stay and the amount of business it does is likely to increase.

Originality/value

Increasing importance is placed on the consideration given to the integrity of institutional protocols regulating decision making at all stages of student progression. A wide variety of elements can impact on the quality of service expected compared with that provided to a student cohort, and this results in a diversity of potential complaints which have to be covered by university protocols. The value of this paper lies in the applicability of the themes that are discussed.

Details

Multicultural Education & Technology Journal, vol. 5 no. 3
Type: Research Article
ISSN: 1750-497X

Keywords

Article
Publication date: 6 July 2015

Ademola O. Kaka, Mehmet Toycan and Stuart D. Walker

A vertically stacked, three layer hybrid Hilbert fractal geometry and serpentine radiator-based patch antenna is proposed and characterized for medical implant applications at the…

Abstract

Purpose

A vertically stacked, three layer hybrid Hilbert fractal geometry and serpentine radiator-based patch antenna is proposed and characterized for medical implant applications at the Industrial, Scientific and Medical band (2.4-2.48 GHz). Antenna parameters are optimised to achieve miniaturized, biocompatible and stable transmission characteristics. The paper aims to discuss these issues.

Design/methodology/approach

Human tissue effects on the antenna electrical characteristics were simulated with a three-layer (skin, fat and muscle) human tissue model with the dimensions of 180×70×60 mm3 (width×height×thickness mm3). Different stacked substrates are utilized for the satisfactory characteristics. Two identical radiating patches are printed on Roger 3,010 (ε r=10.2) and Alumina (ε r=9.4) substrate materials, respectively. In addition, various superstrate materials are considered and simulated to prevent short circuit the antenna while having a direct contact with the metallization, and achieve biocompatibility. Finally, superstrate material of Zirconia (ε r=29) is used to achieve biocompatibility and long-life. A finite element method is used to simulate the proposed hybrid model with commercially available Ansoft HFSS software.

Findings

The antenna is miniaturized, having dimensions of 10×8.4×2 mm3 (width×height×thickness mm3). The resonance frequency of the antenna is 2.4 GHz with a bandwidth of 100 MHz at return loss (S11) of better than −10 dB characteristics. Overall, the proposed antenna have 50 Ω impedance matching, −21 dB far field antenna gain, single-plane omni-directional radiation pattern properties and incident power of 5.3 mW to adhere Specific Absorption Rate regulation limit.

Originality/value

Vertically stacked three layer hybrid design have miniaturized characteristics, wide bandwidth, biocompatible, and stable characteristics in three layer human tissue model make this antenna suitable for implant biomedical monitor systems. The advanced simulation analysis of the proposed design constitutes the main contribution of the paper.

Details

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, vol. 34 no. 4
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 21 August 2009

Mark van Hoorebeek, Stuart Walker and John Dermo

The purpose of this paper is to analyse the parameters of the duty of reasonable adjustment to facilitate access to e‐learning resources.

441

Abstract

Purpose

The purpose of this paper is to analyse the parameters of the duty of reasonable adjustment to facilitate access to e‐learning resources.

Design/methodology/approach

Educational providers continue to develop new methods of delivering content in digital format, the increasing use of broadband, web‐based resources and new content creation software provides numerous methods of delivering excellence in content creation and delivery. It is important that this excellence is available to all; to this end the disability aspects of e‐learning provision are discussed in this paper, specifically relating to a anticipatory “duty of reasonable adjustment” to facilitate access to computer‐based learning resources within the UK education sector.

Findings

The paper concludes that the concept of reasonable adjustment is likely to remain unclear within the current statutory framework, is dynamic in relation to e‐learning software applications, and will continue to increase in scope and complexity as advanced software applications are used on a larger scale in the education sector.

Practical implications

After relating general accessibility approaches to the various open and proprietary source software applications and the concept of “lock in,” the paper argues that knowledge of reasonable adjustment is optimally considered in the early planning stage of development rather than after implementation, under the legislatively mandated anticipatory model. Further conclusions are presented which propose that the approaches described can be scaled up to provide general themes, which benefits the full spectrum of disability alongside the wider student cohort.

Originality/value

Further work is discussed and includes a potential UK extension of the analysis presented by Scroggins in 2007 concerning measurement and structural modeling of reasonableness under the provisions of the US Rehabilitation Act of 1998 and the Americans with Disabilities Act of 1990.

Details

Multicultural Education & Technology Journal, vol. 3 no. 3
Type: Research Article
ISSN: 1750-497X

Keywords

Article
Publication date: 1 March 1985

Dan R. Dalton and Idalene F. Kesner

Even though corporate expansion does not necessarily improve financial performance, large organizations still enjoy many advantages.

558

Abstract

Even though corporate expansion does not necessarily improve financial performance, large organizations still enjoy many advantages.

Details

Journal of Business Strategy, vol. 6 no. 1
Type: Research Article
ISSN: 0275-6668

Article
Publication date: 1 February 1996

Kristin Stoklosa

The purpose of this bibliographic guide is to acquaint librarians with resources on health care provision for patients of various cultures. The sources in this bibliography…

Abstract

The purpose of this bibliographic guide is to acquaint librarians with resources on health care provision for patients of various cultures. The sources in this bibliography address lingual and cultural barriers to communication between patients and health care providers. They also cover the health care needs of specific ethnic groups, the impact of cultural beliefs on health behavior and knowledge, and traditionally held health care practices.

Details

Reference Services Review, vol. 24 no. 2
Type: Research Article
ISSN: 0090-7324

Article
Publication date: 25 October 2013

Iris Stuart, Yong-Chul Shin, Donald P. Cram and Vijay Karan

The use of choice-based, matched, and other stratified sample designs is common in auditing research. However, it is not widely appreciated that the data analysis for these…

Abstract

The use of choice-based, matched, and other stratified sample designs is common in auditing research. However, it is not widely appreciated that the data analysis for these studies has to take into account the non-random nature of sample selection in these designs. A choice-based, matched or otherwise stratified sample is a nonrandom sample that must be analyzed using conditional analysis techniques. We review five research streams in the auditing area. These streams include work on determinants of audit litigation, audit fees, auditor reporting in financially distressed firms, audit quality and auditor switches. Cram, Karan, and Stuart (CKS) (2009) demonstrated the accuracy of conditional analysis, compared to unconditional analysis, of nonrandom samples through the use of simulations, replications, and mathematical proofs. Papers since published have continued to rely upon questionable research, however, and it is hard for researchers to identify what is the reliability of a given work. We complement and extend CKS (2009) by identifying audit papers in selected research streams whose results will likely differ if the data gathered are analyzed using conditional analysis techniques. Thus research can be advanced either by replication and reanalysis, or by refocus of new research upon issues that should no longer be viewed as settled.

Article
Publication date: 3 June 2022

Stuart Jeffery, Julie MacInnes, Lavinia Bertini and Susie Walker

This paper intends to examine and evaluate the implementation and delivery of a discharge to assess pathway based on the UK Department of Health and Social Care Hospital Discharge…

Abstract

Purpose

This paper intends to examine and evaluate the implementation and delivery of a discharge to assess pathway based on the UK Department of Health and Social Care Hospital Discharge Policy in relation to the quadruple aim of healthcare improvement: improving patient experience, reducing costs, benefiting the wider population and improving the work life of staff.

Design/methodology/approach

Using a place based partnership in the south of England, 18 staff involved the delivery of discharge to assess and four patients who had recently been through the pathway were interviewed and the narratives analysed using a framework method.

Findings

All four dimensions of the quadruple aim were felt to be positively impacted by the discharge to assess pathway in varying degrees. Staff described improvements to working lives; patients described a positive experience. There was no evidence of reduced costs and wider benefit through reduced length of stay was suggested rather than demonstrated. The study showed a need to ensure both information flows and discharge process are smooth, that there is sufficient community capacity and capability, a need for strong relationships and shared goals, for clarity of pathway and empowered staff, and for an avoidance of the over prescription of care.

Originality/value

The revised discharge to assess pathway in England has been in place since 2020 and no other assessments of the pathway were found that related the changes to the quadruple aim framework.

Details

Journal of Integrated Care, vol. 31 no. 1
Type: Research Article
ISSN: 1476-9018

Keywords

Article
Publication date: 1 September 2000

Index by subjects, compiled by K.G.B. Bakewell covering the following journals: Facilities Volumes 8‐17; Journal of Property Investment & Finance Volumes 8‐17; Property Management…

27428

Abstract

Index by subjects, compiled by K.G.B. Bakewell covering the following journals: Facilities Volumes 8‐17; Journal of Property Investment & Finance Volumes 8‐17; Property Management Volumes 8‐17; Structural Survey Volumes 8‐17.

Details

Facilities, vol. 18 no. 9
Type: Research Article
ISSN: 0263-2772

Article
Publication date: 1 March 2001

K.G.B. Bakewell

Compiled by K.G.B. Bakewell covering the following journals published by MCB University Press: Facilities Volumes 8‐18; Journal of Property Investment & Finance Volumes 8‐18;…

18686

Abstract

Compiled by K.G.B. Bakewell covering the following journals published by MCB University Press: Facilities Volumes 8‐18; Journal of Property Investment & Finance Volumes 8‐18; Property Management Volumes 8‐18; Structural Survey Volumes 8‐18.

Details

Structural Survey, vol. 19 no. 3
Type: Research Article
ISSN: 0263-080X

1 – 10 of 725