Search results

1 – 10 of over 3000
Article
Publication date: 29 October 2021

Abdelraheem M. Aly and Shreen El-Sapa

The purpose of this paper is to work out the magnetic forces on heat/mass transmission in a cavity filled with a nanofluid and wavy porous medium by applying the…

69

Abstract

Purpose

The purpose of this paper is to work out the magnetic forces on heat/mass transmission in a cavity filled with a nanofluid and wavy porous medium by applying the incompressible smoothed particle hydrodynamics (ISPH) method.

Design/methodology/approach

The cavity is filled by a nanofluid and an undulating layer of a porous medium. The inserted two circular cylinders are rotated around the cavity’s center by a uniform circular velocity. The outer circular cylinder has four gates, and it carries two different boundary conditions. The inner circular cylinder is carrying Th and Ch. The Lagrangian description of the dimensionless regulating equations is solved numerically by the ISPH method.

Findings

The major outcomes of the completed numerical simulations illustrated the significance of the wavy porous layer in declining the nanofluid movements, temperature and concentration in a cavity. The nanofluid movements are declining by an increase in nanoparticle parameter and Hartmann number. The variations on the boundary conditions of an outer circular cylinder are changing the lineaments of heat/mass transfer in a cavity.

Originality/value

The originality of this study is investigating the dual rotations of the cylinders on magnetohydrodynamics thermosolutal convection of a nanofluid in a cavity saturated by two wavy horizontal porous layers.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 32 no. 7
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 31 March 2021

Harina Ndaba, Michael Harber and Warren Maroun

This paper explores how technical constructions of audit practice are influenced by mandatory audit firm rotation (MAFR) regulations. The paper responds to calls for…

Abstract

Purpose

This paper explores how technical constructions of audit practice are influenced by mandatory audit firm rotation (MAFR) regulations. The paper responds to calls for additional research on how external regulation influences audit quality and supplements the predominately quantitative research dealing specifically with firm rotation and its relevance for audit quality.

Design/methodology/approach

Data are collected from South Africa which is the latest jurisdiction to adopt MAFR (from 2017). Detailed interviews with 49 participants comprising 24 audit partners and 25 non-auditors are conducted to explore how MAFR can impact audit quality. For this purpose, audit quality is defined according to a schematic developed interpretively and based on professional auditing standards and the prior research on audit quality.

Findings

There is no guarantee that MAFR will bolster auditors' independence or contribute to a more thorough audit approach. On the contrary, the effort required by incoming audit firms to gain an understanding of new clients coupled with material tendering costs is expected to decrease the profitability of audit engagements with adverse implications for audit quality. A loss of client experience and staff retention challenges may contribute further to a decline in audit quality. There may be some improvements to audit practice when an incumbent firm's work is going to be scrutinised by a new auditor but audit methodologies, including the nature and extent of testing performed, are not expected to change significantly because of MAFR. In this way, the regulation may be a symbolic response to a perceived decline in audit quality and auditor independence rather than part of an effective strategy to encourage more rigorous audit practice for the benefit of the users of financial statements.

Originality/value

The current paper provides one of the first exploratory accountants of how MAFR is expected to impact audit practice and, in turn, audit quality. The research responds to the call for more field-work studies on the mechanics of the audit process by engaging directly with practitioners instead of relying on inferential testing of broad audit quality surrogates. The study also makes an important empirical contribution by providing primary evidence on how external regulation influences audit practice from a seldom studied African perspective.

Details

Journal of Accounting in Emerging Economies, vol. 11 no. 3
Type: Research Article
ISSN: 2042-1168

Keywords

Article
Publication date: 1 October 1947

A rib for aircraft comprising, in combination; a pair of contralateral members, each having upper and lower flanges, webs connecting said flanges, offset surfaces on said…

Abstract

A rib for aircraft comprising, in combination; a pair of contralateral members, each having upper and lower flanges, webs connecting said flanges, offset surfaces on said webs for securing one member to the other; and means bonding said offset surfaces to‐gether; the offset surfaces providing aligned upper and lower slots between said edges of said flanges, and elongated vertical passages between the webs and the slots.

Details

Aircraft Engineering and Aerospace Technology, vol. 19 no. 10
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 7 November 2017

Rajneesh Kumar, Priyanka Kaushal and Rajni Sharma

The purpose of this paper is to investigate a two dimensional problem of micropolar porous thermoelastic circular plate subjected to ramp type heating.

Abstract

Purpose

The purpose of this paper is to investigate a two dimensional problem of micropolar porous thermoelastic circular plate subjected to ramp type heating.

Design/methodology/approach

Three phase lag theory of thermoelasticity has been used to formulate the problem. A numerical inversion technique is applied to obtain the result in the physical domain. The numerical values of the resulting quantities are presented graphically to show the effect of porosity and dual phase lag model. Some particular cases are also presented.

Findings

The Laplace and Hankel transforms are employed followed by the eigen value approach to obtain the components of displacements, microrotation, volume fraction field, temperature distribution and stresses in the transformed domain.

Originality/value

This paper fulfils the need to study the two-dimensional problem of micropolar porous thermoelastic circular plate subjected to ramp type heating.

Details

Multidiscipline Modeling in Materials and Structures, vol. 13 no. 4
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 1 April 1962

D.C. Whittley

In the study or VTOL aircraft, the lifting fan is usually associated with fairly low values of jet velocity, in fact with velocities such that compressibility effects are…

Abstract

In the study or VTOL aircraft, the lifting fan is usually associated with fairly low values of jet velocity, in fact with velocities such that compressibility effects are not appreciable and therefore can be neglected. Some local compressibility effects may occur, at the fan tip, for instance, but such conditions should be avoided and need not affect consideration of the overall performance problem. Many important conclusions can therefore be reached by means of a simplified analysis which clearly illustrates the relationship between the significant parameters. In this simplified approach, consideration is given to the effects of duct losses and forward speed since both these factors are particularly important in the design of both VTOL aircraft and ground effect machines.

Details

Aircraft Engineering and Aerospace Technology, vol. 34 no. 4
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 October 1958

Under this heading are published regularly abstracts of all Reports and Memoranda of the Aeronautical Research Council, Reports and Technical Memoranda of the United…

Abstract

Under this heading are published regularly abstracts of all Reports and Memoranda of the Aeronautical Research Council, Reports and Technical Memoranda of the United States National Advisory Committee for Aeronautics and publications of other similar Research Bodies as issued.

Details

Aircraft Engineering and Aerospace Technology, vol. 30 no. 10
Type: Research Article
ISSN: 0002-2667

Book part
Publication date: 28 November 2017

Korey Rubenstein and Rouxelle De Villiers

Art Rey, a middle-aged general manager (GM) of a FastFood King franchise in a little town far, far away is something of a local legend. His store is renowned in the…

Abstract

Art Rey, a middle-aged general manager (GM) of a FastFood King franchise in a little town far, far away is something of a local legend. His store is renowned in the neighbourhood for its cleanliness, attention to detail and for providing friendly service – often by Art himself, who works tirelessly to ensure a ‘first class’ customer experience. Art has been awarded dozens of recognitions by FastFood King Corporation over three decades of employment, having started with the company as a fry cook when he was quite young. Art progressed through the ranks at the store level, holding many positions before reaching his present post of GM. He is now looking forward to imparting his years of hard-earned knowledge to younger employees and eventually to retirement. In this case study, Art is evaluating the on-the-job performance of a new manager.

Details

Trade Tales: Decoding Customers' Stories
Type: Book
ISBN: 978-1-78714-279-4

Keywords

Article
Publication date: 26 November 2019

Bilal Ahmad, Ahmad Raza Bilal and Mahnoor Hai

The past decade has witnessed a surge in research focused on universal career development needs. In contrast, the purpose of this paper is to offer a contingency…

Abstract

Purpose

The past decade has witnessed a surge in research focused on universal career development needs. In contrast, the purpose of this paper is to offer a contingency perspective based on self-efficacy theory by examining the relationship between the employees’ perceived mode of employment and expectations of career development opportunities attached to the employer. The authors hypothesized that perceived mode of employment determines employees’ expectations about receiving career development opportunities offered by the employer.

Design/methodology/approach

Responses from 203 banking employees were obtained through a structured questionnaire. Perceived employment mode was identified through Ward’s method of cluster analysis. The proposed hypothesis was tested by using one-way analysis of variance.

Findings

Employees across all modes of employment (knowledge-based, job-based, contract-based and alliance-based) were found to be similar with respect to their need for career development programs. However, employees positioned in knowledge-based and alliance-based modes were also interested in career appraisal and career training.

Originality/value

The study contributes to the existing body of knowledge on career management by imparting preliminary insights into the way employees’ expectations of organizational career management opportunities vary according to their perceived mode of employment based on self-efficacy theory.

Details

Asia-Pacific Journal of Business Administration, vol. 11 no. 4
Type: Research Article
ISSN: 1757-4323

Keywords

Article
Publication date: 1 July 1954

The primary objective in the design of the reversers described and illustrated was to obtain a device inherently safe and reliable, using simple locks and mechanisms. A…

Abstract

The primary objective in the design of the reversers described and illustrated was to obtain a device inherently safe and reliable, using simple locks and mechanisms. A secondary, but important requirement was operational flexibility, with the proviso that the device should be used for ground control only. Additionally the installation should not adversely affect the output of the power unit when the former is not in operation.

Details

Aircraft Engineering and Aerospace Technology, vol. 26 no. 7
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 October 1945

A temperature control for aircraft instruments comprising in combination an aircraft engine having a hot oil sump and a relatively cool oil sump, conduits from said sumps…

Abstract

A temperature control for aircraft instruments comprising in combination an aircraft engine having a hot oil sump and a relatively cool oil sump, conduits from said sumps, a mixing valve having intakes connected individually to said conduits, a discharge conduit from said mixing valve, and a thermostatically controlled balanced valve for varying the openings respectively from said hot and cold conduits to said discharge conduit, said thermostat control being housed within said discharge conduit and said discharge conduit extending to an instrument panel board.

Details

Aircraft Engineering and Aerospace Technology, vol. 17 no. 10
Type: Research Article
ISSN: 0002-2667

1 – 10 of over 3000