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Drawing on the transactional theory of stress and coping, this paper aims to identify the relationship between workplace ostracism and job productivity by analyzing the mediating role of emotional exhaustion and lack of motivation.

We collected data from a sample of 396 employees from 20 manufacturing companies in Jordan using a survey-based, two-tiered approach. The partial least squares structural equation modeling method was used to test the direct and indirect effects of ostracism on productivity.

The findings show that workplace ostracism increases emotional exhaustion and motivation, and indirectly decreases job productivity through the mediating role of emotional exhaustion and lack of motivation.

The study provides a theoretical foundation on which various companies can base their understanding of workplace ostracism and its relationship to job productivity. By focusing on increased exhaustion and lack of motivation, this study analyzes current literature to establish the impacts on areas of interest and identify expectations in the context of productivity, as well as enhance comprehension of the detrimental effects of workplace ostracism on productivity.

Workplace flourishing and withdrawal behavior are important concepts for human resource practitioners in today’s multicultural and multilingual work atmosphere. Despite the prevalence of linguistic ostracism, only a handful of studies have considered its impact on workplace flourishing and withdrawal behavior. This paper embarks on unveiling the nature of these associations.

A sample of n = 395 employee responses was obtained from Jordanian tourism and hospitality organizations. The data were analyzed with the variance-based structural equation modeling (VB-SEM) technique using ADANCO software.

VB-SEM results indicate that linguistic ostracism reduces workplace flourishing and indirectly increases withdrawal behavior through the mediating role of workplace flourishing. Decreased feelings of workplace flourishing resulted in increased withdrawal behavior.

This paper is among the first to empirically examine the association between linguistic ostracism, workplace flourishing and withdrawal behavior and the mediating role of workplace flourishing using ethnolinguistic identity and stressor–emotion theories as a theoretical framework. Implications for practice and theory are discussed alongside future research directions.

The purpose of this investigation is to determine the nature of the flow field, temperature distribution and heat and mass transfer in a triangular solar collector enclosure with a corrugated bottom wall in the unsteady condition numerically.

Non-linear governing partial differential equations (i.e. mass, momentum, energy and concentration equations) are transformed into a system of integral equations by applying the Galerkin weighted residual method. The integration involved in each of these terms is performed using Gauss’ quadrature method. The resulting non-linear algebraic equations are modified by the imposition of boundary conditions. Finally, Newton’s method is used to modify non-linear equations into the linear algebraic equations.

Both the buoyancy ratio and thermal Rayleigh number play an important role in controlling the mode of heat transfer and mass transfer.

Calculations are performed for various thermal Rayleigh numbers, buoyancy ratios and time periods. For each specific condition, streamline contours, isotherm contours and iso-concentration contours are obtained, and the variation in the overall Nusselt and Sherwood numbers is identified for different parameter combinations.

The case of metropolitan Doha presents a unique study that has witnessed several transition phases in the urbanization process. It has embarked in massive urbanization processes as part of the national planning vision. Nationals constitute 11% and expatriates constitute 89% of the total population of Qatar, which is environed by the government to manage the economic dynamism. Housing choice reflects the joint influences of government policies, housing market conditions, and personal factors such as housing preferences and the income level. The paper aims at studying housing choices for nationals and expatiates in metropolitan Doha through assessing the factors that limit housing choice for nationals and expatriates, providing policy recommendations to address the demand-supply gap in the market, and propose housing distribution in view of the developed housing choice framework. Three tools have been used: content analysis of reference data, questionnaire survey of housing preferences, and qualitative interview of experts' perceptions. This study has provided qualitative data on the issues of housing distribution and expansion in relation to housing choices. It has concluded baseline information for the nationals and expatriates housing distribution and the demographic dilemma.

A thoroughly literature review reveals that considerable attention have been given only to the two common cases, i.e. enclosure heated from below and heated from the side. For the inclined layer, on the other hand, the numbers of investigations are relatively small. Therefore, this paper aims to investigate the natural convective heat transfer in an inclined porous cavity using non-Darcian flow model, including the boundary surface and inertia effects.

The flow characteristics have been assumed to be two-dimensional, steady, incompressible flow, whereas the properties of porous media have been considered to be homogeneous and isotropic properties solid matrix. The non-Darcian flow model, including the boundary surface and inertia effects, has been numerically solved using finite difference method.

The initiation of multicellular flow and counter-rotating cell are strongly dependent on the aspect ratio A and the inclination angle θ. The orientation of the porous cavity, for a given Ra*, Fs/Pr* and A, has a significant effect on the heat transfer rate. The results also indicated that A has a dominant effect on the Nusselt number. The Nusselt number is strongly dependent on the Ra*, Fs/Pr*, A and θ. Therefore, operating conditions and geometry of the porous enclosure are required to be properly designed to achieve the desired objective.

The developed model can reveal the non-Darcian effects on the fluid flow and heat transfer in inclined porous media under natural convection case.

In casting a new look at city; this study interprets the urban form in respect of the role played by human perception of space. The main aim of this research at a macro level is to attain a strong theorical basis through a multi-dimensional approach to the city. The method of analyzing and carrying out a critique of it at an applied level will clarify the impact, which cultural factors have in the formation of urban form. This preliminary recognition and idealism is based on a hermeneutic and deductive method that is particular to the intellectual sciences In the process of devising theories, studying the urban planning texts related to the subject of study and the conclusion from the field study which is carried out in the Isfahan Naghshe Jahan square in the Safavy period played a key role in the research in addition to the goals and questions.

The recent construction boom has led to new urban development dynamics in Gulf cities driven by real-estate speculations and large infrastructure investments. While in the past affordable housing for medium income migrants and their families was integrated within the fringes of old downtown areas and compound developments in the suburbs, recent investment patterns have led to an increasing challenge of these economically highly engaged social groups to find residences. In recent years, a newly emerging trend in the Gulf region has been the establishment of large scale mass housing projects as new dormitory settlements to address the growing demand for affordable housing. This paper presents an overview of current development patterns by exploring two major affordable housing projects and their impact on sustainability in Doha and Dubai. This is undertaken by establishing a preliminary assessment framework that involves relevant sustainability parameters. The assessment reveals the major differences between both projects and their impact on environment, economy, and society.

Since the end of the 1990s, large-scale mega projects have been initiated in Gulf cities to enable an unprecedented urban growth and the expansion of new economic sectors. In this respect, mega projects have played a key role in redefining housing developments in Gulf cities. This paper explores the newly emerging housing typologies and their distinctive roles in defining new urban environments. The selected case studies are located in the Jumeirah District in Dubai, which can be seen as the first prototype of a large cohesive development area that has been built of nine rather differing mega projects including the iconic Palm project and one of the largest residential high-rise agglomerations in the Middle East. The paper is based on the evaluation of official planning data from each project as well as field observations. Conclusions are drawn to highlight key implications while identifying housing development tendencies.

The use of recycled aggregates (RA) has been explored to lead to a more sustainable future. The paper investigates on a sustainable concrete mix incorporating steel fibres (SF) and RA to provide an alternative to traditional natural aggregate concrete for structural applications. This paper aims to explore the feasibility of combining RA and SF in structural applications in terms of strength, cost and industry perspectives.

A mixed research approach is established with two phases. Phase 1 aims to identify an optimum material combination that satisfies the structural strength requirements and to identify the costs in its optimum combination. Phase 2 involves qualitative interviews with key industry parties to explore their perspective and identify various enablers and barriers for this material.

The optimum combination of 30 per cent RA replacement and 0.3 SF volume content has been identified through laboratory testing. It was noted that there would be a direct additional cost because of SF addition. However, when other benefits such as reduction in transportation costs and landfill dumping fees were considered, an overall cost saving could be achieved. Consequently, the key industry practitioners’ perspectives for this material have been gathered through qualitative interviews. Several enablers and barriers were identified through these interviews.

Even though, there are various research attempts on improving RA for structural purpose by adding different additives, a holistic study that incorporate cost effects and the industry perspectives was lacking and is addressed in this current study. In particular, industry perspectives lead to refocus research directions and get closer to the realisation of a sustainable construction industry.

The purpose of this paper is to make a numerical analysis on unsteady analysis of natural convection heat and mass transfer to obtain flow field, temperature distribution, and concentration distribution.

A finite element method is applied to solve governing equations of natural convection in curvilinear-shaped system for different parameters as thermal Rayleigh numbers (103=Ra_T=106), inclination angle (0°=φ=60°) and Hartmann numbers (0=Ha=100).

Both magnetic field and inclination angle can be used as control parameter on heat and mass transfer. Flow strength decreases almost 100 percent between Ha=0 and Ha=100 on behalf of the higher values of thermal Rayleigh number.

The originality of this work is to application of magnetic field on time-dependent natural convection flow, heat and mass transfer for curvilinear geometry.