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Article
Publication date: 1 March 2002

D.M. Stubbs, S.H. Pulko and A.J. Wilkinson

Numerical modelling is used to predict the thermal behaviour of embedded passive components in multi‐layer PCBs. A three‐signal layer PCB, containing embedded resistors of…

344

Abstract

Numerical modelling is used to predict the thermal behaviour of embedded passive components in multi‐layer PCBs. A three‐signal layer PCB, containing embedded resistors of dimensions 0.3 6 0.3mm and thickness 0.1μm, is used to generate thermal design rules that can be applied to a wide range of PCB structures containing embedded passive components. A software package using the design rules can then make fast predictions on the thermal behaviour of heat‐generating components inside such structures.

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Circuit World, vol. 28 no. 1
Type: Research Article
ISSN: 0305-6120

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Article
Publication date: 1 August 2000

D.M. Stubbs, S.H. Pulko, A.J. Wilkinson, B. Wilson, F. Christiaens and K. Allaert

The embedding of passive components such as resistors, capacitors and inductors within printed circuit boards (PCBs) is motivated, to a large extent, by the desire for increased…

503

Abstract

The embedding of passive components such as resistors, capacitors and inductors within printed circuit boards (PCBs) is motivated, to a large extent, by the desire for increased miniaturisation of electronic goods. However, resistors and, to a lesser extent, inductors are heat generating devices, and the temperature developed within PCBs as the result of the operation of embedded passives is a significant aspect of the design of a multilayer PCB. Here we investigate, by simulation, temperature fields associated with operation of embedded resistors. It is shown that for board dimensions less than 2cm × 2cm temperatures achieved are higher than those associated with larger boards having identical structures and identical resistor heat generation. Detailed simulations are used to investigate the sensitivity of the temperature rises associated with embedded resistors to copper track coverage and to thermal coupling of the PCB to ambient on its upper and lower surfaces. The implications of these findings are discussed both in the context of the design of real PCBs and in the context of thermal simulation.

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Microelectronics International, vol. 17 no. 2
Type: Research Article
ISSN: 1356-5362

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Article
Publication date: 12 November 2010

Andy Mantell

Safeguarding people who have sustained a traumatic brain injury (TBI) requires not only knowledge of safeguarding practice and procedures, but also the implications of a brain…

523

Abstract

Safeguarding people who have sustained a traumatic brain injury (TBI) requires not only knowledge of safeguarding practice and procedures, but also the implications of a brain injury. This paper provides an introduction to the nature and impact of TBI upon individuals and their families. Drawing on anonymised case material and practice experience, it explores how the sequelae of TBI, in particular cognitive, emotional and behavioural changes can produce potential safeguarding issues. The person with TBI's potential vulnerability to different forms of abuse is then considered and the relevance of the legislative framework explored. The paper then summarises key points for safeguarding practice in this complex field. It concludes by emphasising that gaining knowledge of how TBI impacts on individuals and their families is essential to understand their risk of abuse. In doing so, it also highlights that simplistic dichotomies between victim and perpetrator can ignore the complexity of the interactions in which safeguarding occurs.

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The Journal of Adult Protection, vol. 12 no. 4
Type: Research Article
ISSN: 1466-8203

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Article
Publication date: 1 December 2002

181

Abstract

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Microelectronics International, vol. 19 no. 3
Type: Research Article
ISSN: 1356-5362

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Article
Publication date: 1 July 2014

Dimitri Karagiannis, Dimitrios Stamatelos, Theodoros Spathopoulos, Alexandros Solomou, Theodoros Machairas, Nikos Chrysohoidis, Dimitrios Saravanos and Vassilios Kappatos

This study aims to develop an innovative actuator for improving the performance of future aircraft, by adapting the airfoil shape according to the flight conditions. The flap’s…

646

Abstract

Purpose

This study aims to develop an innovative actuator for improving the performance of future aircraft, by adapting the airfoil shape according to the flight conditions. The flap’s camber of a civil regional transportation aircraft’s trailing edge actuated and morphed with the use of shape memory alloys (SMA) actuator technology, instead of the conventional split flap mechanism is studied.

Design/methodology/approach

For the flap’s members sizing an efficient methodology is utilised based on finite element (FE) stress analysis combined to analytically formulated design criteria. A mechanical simulation within an FE approach simulated the performance of the moving rib, integrating both aerodynamic loads and SMA phenomenology, implementing Lagouda’s constitutive model. Aim of this numerical simulation is to provide guidelines for further development of the flap. A three-dimensional assembly of the flap is constructed to produce manufacturing drawing and to ensure that during its morphing no interference between the members occurrs. Eventually, the manufactured flap is integrated on a test rig and the experimental characterisations under no and static loads, and dynamic excitation are performed.

Findings

Experimental results showed that the rib’s SMA mechanism can adequate function under load providing satisfactory morphing capabilities.

Originality/value

The investigated approach is an internal into the flap mechanism based on the shape memory effect of thin wires. In the developed mechanism, SMA wires are attached to the wing structure, where they function as actuating elements.

Details

Aircraft Engineering and Aerospace Technology: An International Journal, vol. 86 no. 4
Type: Research Article
ISSN: 0002-2667

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Article
Publication date: 1 February 1978

DEREK F. STUBBS

An estimate is made of the connectivity of a mammalian neuron, i.e., the number of other neurons to or from which an average neuron directly connects. The value derived is about…

88

Abstract

An estimate is made of the connectivity of a mammalian neuron, i.e., the number of other neurons to or from which an average neuron directly connects. The value derived is about 10. Some functional implications of the value of the connectivity are considered, particularly mental illness, epilepsy, and intelligence. The “length” and “width”, in terms of neurons, of a functional neural channel are discussed.

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Kybernetes, vol. 7 no. 2
Type: Research Article
ISSN: 0368-492X

Available. Open Access. Open Access
Article
Publication date: 30 January 2024

Domingo de-Pedro-Jiménez, Esther Foncubierta-Sierra, Esther Domínguez-Romero, Juan Vega-Escaño, Marta Hernández Martín and Cristina Gavira Fernández

This paper aims to study the influence of leisure-time physical activity on depression crises and the difficulty in performing light household tasks.

515

Abstract

Purpose

This paper aims to study the influence of leisure-time physical activity on depression crises and the difficulty in performing light household tasks.

Design/methodology/approach

A population-based cross-sectional study was conducted using data from the 2020 European Health Survey in Spain. A total of 1,076 individuals diagnosed with depression were selected. ANOVA, chi-square, Fisher’s exact test and Mann–Whitney U test were applied, and a simple moderation analysis was conducted using the SPSS PROCESS 4.0 macro.

Findings

Women had higher percentages of some or much difficulty in performing domestic activities (p = 0.007). Differences were found between experiencing a crisis in the past 12 months versus not having one (p < 0.001): less physical activity was performed, perceived health was worse and difficulty in performing domestic activities increased. The moderation analysis confirmed the moderating effect of physical activity on the relationship between experiencing a crisis and having difficulty with domestic activities (p = 0.017).

Research limitations/implications

The usual limitation of descriptive cross-sectional studies, which cannot establish causal relationships, must be added to low sample sizes in some categories.

Practical implications

The analysis with gender differentiation, promoting gender-specific adapted practices, considering age and personal circumstances of the patient, appropriate exercise prescription, as well as its evaluation and follow-up, are areas where specialist nurses need to delve deeper to enhance the quality of care.

Originality/value

Leisure-time physical activity moderates the relationship between experiencing a crisis and having difficulty with light household tasks: those who engage in occasional physical activity have less difficulty compared to those who do not engage in it.

Details

Journal of Public Mental Health, vol. 23 no. 1
Type: Research Article
ISSN: 1746-5729

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Article
Publication date: 2 October 2017

James Guthrie, Francesca Manes-Rossi and Rebecca Levy Orelli

This paper aims to explore the linkages between integrated reporting (IR) and organisations’ internal processes, specifically focusing on investigating the internal mechanisms of…

3191

Abstract

Purpose

This paper aims to explore the linkages between integrated reporting (IR) and organisations’ internal processes, specifically focusing on investigating the internal mechanisms of change that can lead organisations to adopt IR disclosure and how this impacts on integrated thinking internally.

Design/methodology/approach

The paper draws upon previous analysis and insights provided in the IR academic literature, as well as analysing several directives, policy and framework pronouncements. The study also draws on the management accounting change literature, using it as a lens to observe early adopters’ practice. In addition, it provides detailed case studies considering the internal processes of change in five early adopters of the integrated reporting framework (<IRF>) and whether the adoption leads to internal “integrated thinking”. Five Italian public sector organisations are analysed, and the authors make use of official documents, press releases and in-depth semi-structured interviews with the major internal actors.

Findings

The research highlights that the processes of change in organisations adopting IR is their adoption of a way of thinking, that is, integrated thinking, as a result of the process of internalisation.

Research limitations/implications

Given the short history of IR, this sample is small due to the small number of early adopters.

Originality/value

The paper provides academics and policymakers with insights into the process of change to be considered while adopting the <IRF> and responds to calls in the IR literature for further field-based studies on IR’s impact on internal processes. Also, the paper highlights that the European Directive on the disclosure of non-financial and diversity information (2014/95/EU) has the potential to increase environmental, social and governance disclosures amongst European companies.

Details

Meditari Accountancy Research, vol. 25 no. 4
Type: Research Article
ISSN: 2049-372X

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Article
Publication date: 1 March 1975

D.F. STUBBS

The hardware technology for an intelligent machine is available. We see no contraindication to the construction of the software of such a machine. This paper reviews and lists the…

168

Abstract

The hardware technology for an intelligent machine is available. We see no contraindication to the construction of the software of such a machine. This paper reviews and lists the functional properties of intelligent machines as seen by many authors, and attempts to formulate then in terms of basic computational methods and a program structure. It is suggested that an interchange between brain scientists and artificial intelligence workers could be more fruitful than before. The question of the validity of comparing brains and computers remains unsettled.

Details

Kybernetes, vol. 4 no. 3
Type: Research Article
ISSN: 0368-492X

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Article
Publication date: 1 February 1967

The analyses of trends in prosecutions under the Food and Drugs Act, 1955 and the various regulations, which we have prepared every two years or so, covering a three‐month period…

209

Abstract

The analyses of trends in prosecutions under the Food and Drugs Act, 1955 and the various regulations, which we have prepared every two years or so, covering a three‐month period, have been so much appreciated by readers, both in the administration and the industry itself, that we have prepared a more extended survey, covering the whole of 1966. The survey, as before, takes the form of a month‐by‐month analysis of reports of legal proceedings received by us from all parts of the country, and as formerly records the prosecutions under similar groupings; cases under Section 2, subdivided into those relating to compositional offences, the presence of foreign bodies and those relating to mouldy food: false description cases under Section 6 of the Merchandise Marks Acts; Section 8, the unfit food provision, also subdivided with special categories for foreign bodies and mouldy food; Section 32, milk cases; cases under the Food Hygiene Regulations, 1960, with smoking offences separated; the Milk and Dairies Regulations, consisting almost entirely of prosecutions under Reg. 27, Meat Regulations, Preservative Regulations, Colouring Matter in Food Regulations, etc.

Details

British Food Journal, vol. 69 no. 2
Type: Research Article
ISSN: 0007-070X

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