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Article
Publication date: 9 June 2023

Chongbin Zhao, B.E. Hobbs and Alison Ord

The objective of this paper is to establish a solution strategy for obtaining dual solutions, namely trivial (conventional) and nontrivial (unconventional) solutions, of coupled…

Abstract

Purpose

The objective of this paper is to establish a solution strategy for obtaining dual solutions, namely trivial (conventional) and nontrivial (unconventional) solutions, of coupled pore-fluid flow and chemical dissolution problems in heterogeneous porous media.

Design/methodology/approach

Through applying a perturbation to the pore-fluid velocity, original governing partial differential equations of a coupled pore-fluid flow and chemical dissolution problem in heterogeneous porous media are transformed into perturbed ones, which are then solved by using the semi-analytical finite element method. Through switching off and on the applied perturbation terms in the resulting perturbed governing partial differential equations, both the trivial and nontrivial solutions can be obtained for the original governing partial differential equations of the coupled pore-fluid flow and chemical dissolution problem in fluid-saturated heterogeneous porous media.

Findings

When a coupled pore-fluid flow and chemical dissolution system is in a stable state, the trivial and nontrivial solutions of the system are identical. However, if a coupled pore-fluid flow and chemical dissolution system is in an unstable state, then the trivial and nontrivial solutions of the system are totally different. This recognition can be equally used to judge whether a coupled pore-fluid flow and chemical dissolution system involving heterogeneous porous media is in a stable state or in an unstable state. The proposed solution strategy can produce dual solutions for simulating coupled pore-fluid flow and chemical dissolution problems in fluid-saturated heterogeneous porous media.

Originality/value

A solution strategy is proposed to obtain the nontrivial solution, which is often overlooked in the computational simulation of coupled pore-fluid flow and chemical dissolution problems in fluid-saturated heterogeneous porous media. The proposed solution strategy provides a useful way for understanding the underlying dynamic mechanisms of the chemical damage effect associated with the stability of structures that are built on soil foundations.

Details

Engineering Computations, vol. 40 no. 4
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 30 November 2021

Chongbin Zhao, B.E. Hobbs and Alison Ord

The objective of this paper is to develop a semi-analytical finite element method for solving chemical dissolution-front instability problems in fluid-saturated porous media.

Abstract

Purpose

The objective of this paper is to develop a semi-analytical finite element method for solving chemical dissolution-front instability problems in fluid-saturated porous media.

Design/methodology/approach

The porosity, horizontal and vertical components of the pore-fluid velocity and solute concentration are selected as four fundamental unknown variables for describing chemical dissolution-front instability problems in fluid-saturated porous media. To avoid the use of numerical integration, analytical solutions for the property matrices of a rectangular element are precisely derived in a purely mathematical manner. This means that the proposed finite element method is a kind of semi-analytical method. The column pivot element solver is used to solve the resulting finite element equations of the chemical dissolution-front instability problem.

Findings

The direct use of horizontal and vertical components of the pore-fluid velocity as fundamental unknown variables can improve the accuracy of the related numerical solution. The column pivot element solver is useful for solving the finite element equations of a chemical dissolution-front instability problem. The proposed semi-analytical finite element method can produce highly accurate numerical solutions for simulating chemical dissolution-front instability problems in fluid-saturated porous media.

Originality/value

Analytical solutions for the property matrices of a rectangular element are precisely derived for solving chemical dissolution-front instability problems in fluid-saturated porous media. The proposed semi-analytical finite element method provides a useful way for understanding the underlying dynamic mechanisms of the washing land method involved in the contaminated land remediation.

Details

Engineering Computations, vol. 39 no. 5
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 6 May 2020

Mark Leather, Gil Fewings and Su Porter

This paper discusses the history of outdoor education at a university in the South West England, starting in 1840.

Abstract

Purpose

This paper discusses the history of outdoor education at a university in the South West England, starting in 1840.

Design/methodology/approach

This research uses secondary sources of data; original unpublished work from the university archive is used alongside published works on the university founders and first principals, as well as sources on the developments of outdoor education in the UK.

Findings

Both founding principals were driven by their strong values of social justice and their own experiences of poverty and inequality, to establish a means for everyone to access high-quality education regardless of background or means. They saw education as key to providing a pathway out of poverty and towards opportunity and achievement for all. Kay-Shuttleworth, founder of St John's, wrote that “the best book is Nature, with an intelligent interpreter”, whilst Derwent Coleridge, St Mark's first principal, had a profound love of nature and reverence for his father's poetic circle. His father, the famous English Romantic poet Samuel Taylor–Coleridge, made the first recorded use of the verb “mountaineering”. Coleridge was using a new word for a new activity; the ascending of mountains for pleasure, rather than for economic or military purposes.

Originality/value

The Romantic influence on outdoor education, the early appreciation of nature and the outdoors for physical and psychological well-being and the drive for social justice have not been told in any case study before.

Details

History of Education Review, vol. 49 no. 1
Type: Research Article
ISSN: 0819-8691

Keywords

Article
Publication date: 18 May 2011

Jade A. Hill and Stephen Moston

In the last decade, Australia has seen a series of high‐profile criminal cases come under court and public scrutiny due to improper interviewing practices, prompting a need to…

2346

Abstract

Purpose

In the last decade, Australia has seen a series of high‐profile criminal cases come under court and public scrutiny due to improper interviewing practices, prompting a need to review and revise training in interviewing skills. This pattern echoes that seen in the UK in the 1970s and 1980s. What followed in the UK was a plethora of research examining different aspects of police interviewing. To date, there has been limited research in Australia on interviewing suspects. The purpose of this paper is to provide insight into a large sample of current Australian police officers' attitudes and practices regarding investigative interviewing.

Design/methodology/approach

This study involved a survey of current police officers from the Queensland Police Service (n=2,769), collecting data on attitudes with current training and supervision, importance of investigative interviewing and operational skills and competence.

Findings

These are discussed in relation to the need for further systematic research into police interviews, improved training and the need for law enforcement organisations and agencies in Australia to implement organisational investigative interviewing strategies.

Originality/value

The paper shows that further systematic research is required to examine “operational” investigative interviewing practices (as opposed to perceptions) in Australia. Consideration also needs to be given to the development of investigative interviewing training frameworks that focus on the experience, skills and previous training of each officer. Moreover, interviewing needs to be recognised as a skill requiring regular maintenance, monitoring and evaluation.

Details

The British Journal of Forensic Practice, vol. 13 no. 2
Type: Research Article
ISSN: 1463-6646

Keywords

Article
Publication date: 1 February 1985

The whole kingdom from north to south at the time of writing is enveloped in freezing Arctic weather, reminiscent of the North Russian campaign of long ago. The normal winter is…

Abstract

The whole kingdom from north to south at the time of writing is enveloped in freezing Arctic weather, reminiscent of the North Russian campaign of long ago. The normal winter is relatively mild, mainly a Westerly pattern, occasionally wild and windy, wet with a rare cold “snap”. There are variations in the pattern, damp and warm in the south‐west, few frosts and rarely any snow; in the north of the country, Scotland, much colder, with the south‐east partaking of the weather pattern of the land mass of the Continent. The variations appear more of the mild weather in the South and colder, appreciably, in the North; recalling service personnel stationed at Gosport who did not need an overcoat all winter, whereas in the North, many found it necessary to wear a light overcoat tor most of the year, the south‐east corner of England, obtaining no help from the warming Gulf Stream, often gets the worst of the weather, which it has done to a very considerable extent in this winter.

Details

British Food Journal, vol. 87 no. 2
Type: Research Article
ISSN: 0007-070X

Article
Publication date: 1 March 1978

David D. Ginsburg

The stand‐out works this year are a number of comprehensive general discographies. Before reviewing them in detail in Part Two, I would like to single out three of them here for…

Abstract

The stand‐out works this year are a number of comprehensive general discographies. Before reviewing them in detail in Part Two, I would like to single out three of them here for special attention.

Details

Reference Services Review, vol. 6 no. 3
Type: Research Article
ISSN: 0090-7324

Content available
Book part
Publication date: 20 August 1996

Abstract

Details

The Peace Dividend
Type: Book
ISBN: 978-0-44482-482-0

Article
Publication date: 3 September 2020

David Mount and Lorraine Mazerolle

Police invest significant time, energy and resources to equip officers with the skills required to conduct effective investigative interviews. However, transferring those skills…

Abstract

Purpose

Police invest significant time, energy and resources to equip officers with the skills required to conduct effective investigative interviews. However, transferring those skills acquired or developed in a training environment for application in the police workplace is a journey fraught with impediments and diversions. Invariably, the quality and amount of skills transferred and applied on the job represent a paltry return on resource investment. This research explores the factors that impact the transfer of investigative interviewing skills from the training environment to the police workplace.

Design/methodology/approach

Interviews with 40 officers, both uniformed and plain-clothes, were conducted to explore the influences on and impediments to effective skill transfer. Data were inductively analysed and thematically pattern-matched with existing research findings in the adult training domain.

Findings

Results indicate that trainee motivation, perceptions of training relevance, perceptions of training quality and preparedness to conduct the task as trained directly and indirectly influence the degree to which investigative interviewing skills transfer from the training environment to the police workplace.

Originality/value

This is original research in a domain that has previously received limited academic attention. An awareness of the factors that negatively impact on the transfer of acquired skills and ways to mitigate or ameliorate the detrimental effects are likely to assist police trainers and workplace managers to improve transfer rates and get more outcome value for the money, time and effort invested in training regimes.

Details

Policing: An International Journal, vol. 44 no. 3
Type: Research Article
ISSN: 1363-951X

Keywords

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