Search results

1 – 10 of 80
Article
Publication date: 2 July 2018

Emmanuel Duguet, Rémi Le Gall, Yannick L’Horty and Pascale Petit

The purpose of this paper is to provide evidence of the effect of labour market status on the current probability to be invited to a hiring interview. The authors compare the…

Abstract

Purpose

The purpose of this paper is to provide evidence of the effect of labour market status on the current probability to be invited to a hiring interview. The authors compare the effect of periods of unemployment, part-time job and short-term contracts (STCs).

Design/methodology/approach

Correspondence tests were conducted for accountants and sales assistants. The authors estimate the discrimination components from the response rate of each candidate by the asymptotic least squares method.

Findings

The authors find that men with a part-time profile suffer discrimination in both professions. Other differences of treatment are specific: for accountants, the authors find that the probability of success decreases with the time spent in unemployment, while for sales assistants the probability of success is smaller with a history of STCs.

Originality/value

This study compares the effect of different dimensions of career history (part-time versus full-time, permanent versus short-term, unemployment versus employment) for experienced job candidates. It also proposes an alternative way to exploit the design of a correspondence experiment.

Details

International Journal of Manpower, vol. 39 no. 4
Type: Research Article
ISSN: 0143-7720

Keywords

Article
Publication date: 3 April 2018

Emmanuel Duguet, Loïc du Parquet, Yannick L’Horty and Pascale Petit

Mentioning car and motorcycle licences on a resume sends a signal of strong mobility, which should increase the chances of getting a job in congested traffic areas. The purpose of…

Abstract

Purpose

Mentioning car and motorcycle licences on a resume sends a signal of strong mobility, which should increase the chances of getting a job in congested traffic areas. The purpose of this paper is to examine whether this is the case for both women and men.

Design/methodology/approach

The authors implement an experimental design in order to test for the existence of gender discrimination. The authors use the first-order stochastic dominance (FOSD) criterion and estimate components models.

Findings

The authors find that holding a motorcycle licence leads to a counterproductive selection of female candidates, since the highest commuting mobility meets the lowest hiring rate.

Research limitations/implications

The methodology developed in the paper can be used for all correspondence test data.

Originality/value

The authors examine effects that have not been observed thus far in the literature, namely, the effects of gender crossed with the effects of the class of driving licence that is mentioned on the resume. The authors also advocate the use of the FOSD criterion to discrimination studies.

Details

International Journal of Manpower, vol. 39 no. 1
Type: Research Article
ISSN: 0143-7720

Keywords

Article
Publication date: 7 September 2012

Monique Aubry and Sylvain Lenfle

The purpose of this paper is to revisit Christophe Midler's contribution through L'auto qui n'existait pas (The car that did not exist), first published in 1993. The paper…

1278

Abstract

Purpose

The purpose of this paper is to revisit Christophe Midler's contribution through L'auto qui n'existait pas (The car that did not exist), first published in 1993. The paper summarizes and examines the main themes of the book based on current knowledge and ends with suggestions for future research opportunities.

Design/methodology/approach

The paper is grounded in an in‐depth analysis of Midler's book and a one‐hour interview with him.

Findings

Midler argues that projectification is not a temporary managerial fashion; quite the contrary. At Renault, he witnessed a profound industrial transformation founded on collective learning. Central to this transformation was the establishment of project management as an engine of renewal within the permanent organisation.

Practical implications

Revisiting Midler's work on projectification generates new insights into understanding the current situation confronting organisations in all industries as they evolve in their approach to creativity and innovation.

Originality/value

Two original facets of Midler's seminal work still influence the field of project management. First, he provided a global understanding of the creative organisation. He described, analysed and explained how an organisation reinvents itself, not only in terms of project management, but more globally, from a permanent organisation perspective. Recent research developments focus on project‐oriented organisations, program and portfolio management, organisational project management, and others. Midler's work should be more widely known and referenced for its capacity to conceptualise what simultaneously happens in multiple, concurrent, organisational terms as a project is carried out (e.g. financial, commercial, technological and career development). Second, Midler conducted a study from within an organisation for four years. In this respect, he could be seen as a precursor of recent project management research practices.

Details

International Journal of Managing Projects in Business, vol. 5 no. 4
Type: Research Article
ISSN: 1753-8378

Keywords

Article
Publication date: 2 January 2020

Abderahmane Marouf, Yannick Bmegaptche Tekap, Nikolaos Simiriotis, Jean-Baptiste Tô, Jean-François Rouchon, Yannick Hoarau and Marianna Braza

The purpose of this study illustrates the morphing effects around a large-scale high-lift configuration of the Airbus A320 with two elements airfoil-flap in the take-off position…

Abstract

Purpose

The purpose of this study illustrates the morphing effects around a large-scale high-lift configuration of the Airbus A320 with two elements airfoil-flap in the take-off position. The flow around the airfoil-flap and the near wake are analysed in the static case and under time-dependent vibration of the flap trailing-edge known as the dynamic morphing.

Design/methodology/approach

Experimental results obtained in the subsonic wind tunnel S1 of Institut de Mécanique des Fluides de Toulouse of a single wing are discussed with high-fidelity numerical results obtained by using the Navier–Stokes multi-block (NSMB) code with advanced turbulent modelling able to capture the predominant instabilities and coherent structure dynamics. An explanation of the dynamic time-dependent grid deformation is provided, which is used in the NSMB code to simulate the flap’s trailing-edge deformation in the morphing configuration. Finally, power spectral density is performed to reveal the coherent wake structures and their modification because of the morphing.

Findings

Frequency of vibration and amplitude of deformation effects are investigated for different morphing cases. Optimal morphing regions at a specific frequency and a slight deformation were able to attenuate the predominant natural shear-layer frequency and to considerably decrease the width of the von Kármán vortices with a simultaneous increase of aerodynamic performances.

Originality/value

The new concept of future morphed wings is proposed for a large scale A320 prototype at the take-off position. The dynamic morphing of the flap’s trailing-edge is simulated for the first time for high-lift two-element configuration. In addition, the wake analysis performed helped to show the turbulent structures according to the organised eddy simulation model.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 31 no. 2
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 8 June 2015

Ayesha Farooq, Ashraf Khan Kayani and Khalil Ahmad

The purpose of this paper is to look into marriage patterns and family structure and changes therein over the period of 50 years. Reasons for change in marriage patterns are also…

Abstract

Purpose

The purpose of this paper is to look into marriage patterns and family structure and changes therein over the period of 50 years. Reasons for change in marriage patterns are also included. It also includes marriage arrangements in the village by time periods. The latter part of the paper explores changes in family structure and its relevant reasons over the decades.

Design/methodology/approach

Survey was conducted to attain and assess the required information. An interview schedule was developed as a tool for data collection. Systematic sampling technique was used for the selection of the respondents (aged 55+). These respondents were assumed to have observed the changes over the decades. The results were based on trend analysis from 1960s through 2008.

Findings

The results showed that material exchanges on the vital events have declined with the exception of marriage occasion over the period of time. The data shows that most of the marriages were taking place between close relatives from 1960s through 1980s. Substantial decline in these marriages was replaced by corresponding increase in inter-caste marriages after 1990 due to education and economic factors. During the same period, a shift is observed from joint family system to nuclear one.

Social implications

Policy makers might consider various social trends to manage changes in a traditional society.

Originality/value

This paper focusses on changes in marriage patterns and family structure along with their pertinent causal factors in a rural community of the Punjab, Pakistan.

Details

International Journal of Sociology and Social Policy, vol. 35 no. 5/6
Type: Research Article
ISSN: 0144-333X

Keywords

Article
Publication date: 18 October 2021

Nicolas Gourdain, Jéromine Dumon, Yannick Bury and Pascal Molton

The transonic buffet is a complex aerodynamics phenomenon that imposes severe constraints on the design of high-speed vehicles, including for aircraft and space launchers. The…

Abstract

Purpose

The transonic buffet is a complex aerodynamics phenomenon that imposes severe constraints on the design of high-speed vehicles, including for aircraft and space launchers. The origin of buffet is still debated in the literature, and the control of this phenomenon remains difficult. This paper aims to propose an original scenario to explain the origin of buffet, which in turn opens promising perspectives for its alleviation and attenuation.

Design/methodology/approach

This work relies on the use of numerical simulations, with the idea to reproduce the buffet phenomenon in a transonic aileron designed for small space launchers. Two numerical approaches are tested: unsteady Reynolds averaged Navier–Stokes (URANS) and large-eddy simulation (LES). The numerical predictions are first validated against available experimental data, before to be analysed in detail to identify the origin of buffet on the studied configuration. A complementary numerical study is then conducted to assess the possibility to delay the onset of buffet.

Findings

The buffet control strategy is based on wall cooling. By adequately choosing the wall temperature, this work shows that it is feasible to delay the emergence of buffet. More precisely, this paper highlights the crucial role of the subsonic flow inside the boundary layer, showing the existence of upstream travelling pressure waves that are responsible for the flow coupling between both sides of the airfoil, at the origin of the buffet phenomenon.

Originality/value

This paper proposes a new scenario to explain the origin of buffet, based on the use of a Fanno and Rayleigh flow analogies. This approach is used to design a control solution based on a modification of the wall temperature, showing very promising results.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 32 no. 4
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 27 February 2024

Jacques Abou Khalil, César Jiménez Navarro, Rami El Jeaid, Abderahmane Marouf, Rajaa El Akoury, Yannick Hoarau, Jean-François Rouchon and Marianna Braza

This study aims to investigate the morphing concepts able to manipulate the dynamics of the downstream unsteadiness in the separated shear layers and, in the wake, be able to…

Abstract

Purpose

This study aims to investigate the morphing concepts able to manipulate the dynamics of the downstream unsteadiness in the separated shear layers and, in the wake, be able to modify the upstream shock–boundary layer interaction (SBLI) around an A320 morphing prototype to control these instabilities, with emphasis to the attenuation or even suppression of the transonic buffet. The modification of the aerodynamic performances according to a large parametric study carried out at Reynolds number of 4.5 × 106, Mach number of 0.78 and various angles of attack in the range of (0, 2.4)° according to two morphing concepts (travelling waves and trailing edge vibration) are discussed, and the final benefits in aerodynamic performance increase are evaluated.

Design/methodology/approach

This article examines through high fidelity (Hi-Fi) numerical simulation the effects of the trailing edge (TE) actuation and of travelling waves along a specific area of the suction side starting from practically the most downstream position of the shock wave motion according to the buffet and extending up to nearly the TE. The present paper studies through spectral analysis the coherent structures development in the near wake and the comparison of the aerodynamic forces to the non-actuated case. Thus, the physical mechanisms of the morphing leading to the increase of the lift-to-drag ratio and the drag and noise sources reduction are identified.

Findings

This study investigates the influence of shear-layer and near-wake vortices on the SBLI around an A320 aerofoil and attenuation of the related instabilities thanks to novel morphing: travelling waves generated along the suction side and trailing-edge vibration. A drag reduction of 14% and a lift-to-drag increase in the order of 8% are obtained. The morphing has shown a lift increase in the range of (1.8, 2.5)% for angle of attack of 1.8° and 2.4°, where a significant lift increase of 7.7% is obtained for the angle of incidence of 0° with a drag reduction of 3.66% yielding an aerodynamic efficiency of 11.8%.

Originality/value

This paper presents results of morphing A320 aerofoil, with a chord of 70cm and subjected to two actuation kinds, original in the state of the art at M = 0.78 and Re = 4.5 million. These Hi-Fi simulations are rather rare; a majority of existing ones concern smaller dimensions. This study showed for the first time a modified buffet mode, displaying periodic high-lift “plateaus” interspersed by shorter lift-decrease intervals. Through trailing-edge vibration, this pattern is modified towards a sinusoidal-like buffet, with a considerable amplitude decrease. Lock-in of buffet frequency to the actuation is obtained, leading to this amplitude reduction and a drastic aerodynamic performance increase.

Details

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

Keywords

Article
Publication date: 3 December 2019

Yannick Hascoët

The purpose of this paper is to discuss the touristic classification of the developing practices in the northern districts of Marseille (France).

Abstract

Purpose

The purpose of this paper is to discuss the touristic classification of the developing practices in the northern districts of Marseille (France).

Design/methodology/approach

This paper is based on participant observation and semi-structured interviews, sometimes conducted within a sightseeing tour situation and loosely inspired by the “guided tours” technique.

Findings

The paper shows there is currently no definition of tourism in itself, just tourism for itself. Hence, the touristic classification of the implementations in Marseille’s northern districts is relative, relational and transversal.

Research limitations/implications

The paper does not exhaust (far from it) the subject of the touristic classification of the implementations in Marseille or, a fortiori, the debate on what “makes” tourism. This paper is simply one link in the historical chain of Marseille’s northern districts, which are (or are not) currently being invented as a tourist destination.

Practical implications

This research has led to sustained and continuous exchanges since 2012 with the Hôtel du Nord cooperative, which discusses and integrates the academic point of view into its practice, most notably to advance in its relationship with the touristic classification of the practices it deploys.

Originality/value

The contribution made by this paper to the debate on the classification of contemporary tourism is based on a domain that is as yet relatively unexplored from this point of view and which has benefited from the close investigation of practices that the author’s embedded-researcher position has allowed.

Details

International Journal of Tourism Cities, vol. 5 no. 3
Type: Research Article
ISSN: 2056-5607

Keywords

Book part
Publication date: 23 August 2022

Meagan Hoff

Within the context of forced migration, literacy can facilitate liberation and participation, though literacy often serves instead to exclude. Given the ongoing global refugee…

Abstract

Within the context of forced migration, literacy can facilitate liberation and participation, though literacy often serves instead to exclude. Given the ongoing global refugee crisis, literacy researchers must work toward understanding how literacy shapes the livelihoods of those impacted by forced migration. The purpose of this study was to interrogate the ways in which certain literacies were valued or disregarded in the pursuit of a college degree and to uncover the ways that refugee-background students navigated these limitations. Using a multiple case study, this research explored the experiences of six students from refugee backgrounds as they navigated the literacy expectations of the college program. This chapter highlights two themes – our way versus their way and playing the game – that highlight the ways that participants pushed against the literacy constraints that they perceived in the program.

Article
Publication date: 8 May 2018

Pierre Lavoie, Dorian Pena, Yannick Hoarau and Eric Laurendeau

This paper aims to assess the strengths and weaknesses of four thermodynamic models used in aircraft icing simulations to orient the development or the choice of an improved…

Abstract

Purpose

This paper aims to assess the strengths and weaknesses of four thermodynamic models used in aircraft icing simulations to orient the development or the choice of an improved thermodynamic model.

Design/methodology/approach

Four models are compared to assess their capabilities: Messinger, iterative Messinger, extended Messinger and shallow water icing models. They have been implemented in the aero-icing framework, NSCODE-ICE, under development at Polytechnique Montreal since 2012. Comparison is performed over typical rime and glaze ice cases. Furthermore, a manufactured geometry with multiple recirculation zones is proposed as a benchmark test to assess the efficiency in runback water modeling and geometry evolution.

Findings

The comparison shows that one of the main differences is the runback water modeling. Runback modeling based on the location of the stagnation point fails to capture the water film behavior in the presence of recirculation zones on airfoils. However, runback modeling based on air shear stress is more suitable in this situation and can also handle water accumulation while the other models cannot. Also, accounting for the conduction through the ice layer is found to have a great impact on the final ice shape as it increases the overall freezing fraction.

Originality/value

This paper helps visualize the effect of different thermodynamic models implemented in the same aero-icing framework. Also, the use of a complex manufactured geometry highlights weaknesses not normally noticeable with classic ice accretion simulations. To help with the visualization, the ice shape is presented with the water layer, which is not shown on typical icing results.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 28 no. 5
Type: Research Article
ISSN: 0961-5539

Keywords

1 – 10 of 80