Search results

1 – 10 of 345
Article
Publication date: 11 December 2018

Deepak Bangwal and Prakash Tiwari

The hotel industry suffers from retaining its employees, and to retain their employees is a big challenge to the hotel industry. So, the purpose of this study is to examine the…

5606

Abstract

Purpose

The hotel industry suffers from retaining its employees, and to retain their employees is a big challenge to the hotel industry. So, the purpose of this study is to examine the causal relationship between workplace design features of hospitality industry with employee job satisfaction and their intent to stay through empirical validation.

Design/methodology/approach

As per the objective of the study, three hypotheses were proposed based on a comprehensive literature review on workplace design features of the hospitality industry. The proposed relationships were examined by using structural equation modeling approach with AMOS 18 as prescribed by Hair et al. (1998).

Findings

Significant evidence was found in favor of proposed hypotheses. The result of hypothesis testing showed workplace design features of hospitality industry to positively influence employee’s intent to stay through job satisfaction.

Originality/value

While the employee satisfaction and commitment has been a significant research topic for more than decades, barely any research has been conducted that focuses specifically on workplace design features of a hospitality industry. This study tries to make a link between workplace design with the employee intent to stay through employee satisfaction. These links are rare from an Indian perspective.

Details

International Journal of Contemporary Hospitality Management, vol. 31 no. 1
Type: Research Article
ISSN: 0959-6119

Keywords

Article
Publication date: 12 September 2018

Deepak Bangwal and Prakash Tiwari

The purpose of this paper is to examine how environmental design features of a green building contribute to the formation of employees’ organization image (OIM) through better…

Abstract

Purpose

The purpose of this paper is to examine how environmental design features of a green building contribute to the formation of employees’ organization image (OIM) through better environmental awareness (EAW) within employees.

Design/methodology/approach

Based on a comprehensive literature review on environmental design features of a building, a theoretical model was proposed for investigation. Three putative paths linking workspace (WSP) to EAW, departmental space (DSP) to EAW and EAW to OIM were then tested relying on a survey data of 362 employees collected from three Leadership in Energy and Environmental Design certified buildings by using structural equation modeling methodology as prescribed by Hair et al.

Findings

Significant evidence was found in support of all three purposed paths. Further, the study found that workspace and the DSP together explained around 46 percent of the variance in employee’s EAW, which then explained around 54 percent of the variance in the formation of the employees’ OIM.

Research limitations/implications

The study drew data only from green certified organizations. Future research should involve other green organizations or a larger sample of green buildings. The size and character of the sample were restricted by organizational constraints.

Practical implications

The organizations need to be extremely cautious of green concerns during the design phase in order to capitalize on the yields of better employees’ OIM. It also motivates the other organizational group toward the green building concept to increase the employees’ EAW and to enhance organizational values and image.

Originality/value

While the green concept has been a significant research topic for more than decades, barely any research has been conducted that focuses specifically on environmental design features of a green building on employees’ EAW and OIM. This study tries to make a link between green building design features with employees’ EAW and OIM. These links are rare in Indian perspective.

Details

Engineering, Construction and Architectural Management, vol. 26 no. 1
Type: Research Article
ISSN: 0969-9988

Keywords

Article
Publication date: 4 September 2017

Amita Rani, Niraj Bala and C.M. Gupta

Hot corrosion is the major degradation mechanism of failure of boiler and gas turbine components. The present work aims to investigate the hot corrosion resistance of detonation…

Abstract

Purpose

Hot corrosion is the major degradation mechanism of failure of boiler and gas turbine components. The present work aims to investigate the hot corrosion resistance of detonation gun sprayed (D-gun) Cr2O3-75 per cent Al2O3 ceramic coating on ASTM-SA210-A1 boiler steel.

Design/methodology/approach

The coating exhibits nearly uniform, adherent and dense microstructure with porosity less than 0.8 per cent. Thermogravimetry technique is used to study the high temperature hot corrosion behavior of bare and coated boiler steel in molten salt environment (Na2SO4-60 per cent V2O5) at high temperature 900°C for 50 cycles. The corrosion products are analyzed by using X-ray diffraction, scanning electron microscopy (SEM) and field emission scanning electron microscope/energy-dispersive analysis (EDAX) to reveal their microstructural and compositional features for elucidating the corrosion mechanisms.

Findings

During investigations, it was found that the Cr2O3-75 per cent Al2O3 coating on Grade A-1 boiler steel is found to be very effective in decreasing the corrosion rate in the molten salt environment at 900°C. The coating has shown lesser weight gains along with better adhesiveness of the oxide scales with the substrate till the end of the experiment. Thus, coatings serve as an effective diffusion barrier to preclude the diffusion of oxygen from the environment into the substrate boiler steel.

Research limitations/implications

Therefore, it is concluded that the better hot corrosion resistance of the coating is due to the formation of desirable microstructural features such as very low porosity, uniform fine grains and the flat splat structures in the coating; as compared to the bare substrate under cyclic conditions.

Practical implications

This research is useful for coal-fired boilers and other power plant boilers.

Social implications

This research is useful for power generation plants.

Originality/value

There is no reported literature on hot corrosion behavior of Cr2O3-75 per cent Al2O3 coating deposited on the selected substrates by D-gun spray technique. The present work has been focused to study the influence of the Cr2O3-75 per cent Al2O3 coating developed with D-gun spraying technique on high temperature corrosion behavior of ASTM-SA210-A-1 boiler steel in an aggressive environment of Na2SO4-60 per cent V2O5 molten salt at 900°C under cyclic conditions.

Details

Anti-Corrosion Methods and Materials, vol. 64 no. 5
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 2 November 2012

Pradeep K. Rawat, Prakash C. Tiwari and Charu C. Pant

The purpose of the study is to assess the environmental and socio‐economic impacts and risks of climate change through GIS database management system (DBMS) on land…

Abstract

Purpose

The purpose of the study is to assess the environmental and socio‐economic impacts and risks of climate change through GIS database management system (DBMS) on land use‐informatics and climate‐informatics. The Dabka watershed constitutes a part of the Kosi Basin in the Lesser Himalaya, India in district Nainital has been selected for the case illustration.

Design/methodology/approach

Land use‐informatics consists of land use mapping and change diction, i.e. decadal changes and annual changes. Climate‐informatics consists of climate change detection through daily, monthly and annual weather data for a period of 25 years.

Findings

The exercise revealed that oak and pine forests have decreased, respectively, by 25 percent (4.48 km2) and 3 percent (0.28 km2) thus bringing a decline of 4.76 km2 forest in the watershed during 1990 to 2010. But, due to climate change the mixed forest taking place of oak forest in certain pockets and consequently the mixed forest in the catchment increased by 18 percent (2.3 km2) during the same period which reduced the overall loss of forests in the region but its not eco‐friendly as the oak forest. Barren land increased 1.21 km2 (56 percent), riverbed increased 0.78 km2 (52 percent) and cultivated land increased about 0.63 km2 (3 percent) during the period of 1990 to 2010. Out of the total seven classes of the land use land cover, five classes (i.e. Oak, Pine, Mixed, Barren and Riverbed) are being changed dominantly due to climate change factor and anthropogenic factors plays a supporting role whereas only two classes (scrub land and agricultural land) are being changed dominantly by anthropogenic factors and climate change factors plays a supporting role. Expansion of mixed forest land brought out due to upslope shifting of existing forest species due to climate change factor only because upslope areas getting warmer than past with the rate of 9°C‐12°C/two decades. Consequently, the results concluded that the high rate of land use change accelerating several environmental problems such as high runoff, flash flood, river‐line flood and soil erosion during monsoon season and drought during non‐monsoon period. These environmental problems cause great loss to life and property and poses serious threat to the process of development with have far‐reaching economic and social consequences.

Originality/value

This study generated primary data on land use‐informatics and climate‐informatics to integrate each‐other for impact assessment and mitigation through sustainable land use as constitutes a part of a multidisciplinary project, Department of Science and Technology (D.S.T.) Government of India.

Details

International Journal of Climate Change Strategies and Management, vol. 4 no. 4
Type: Research Article
ISSN: 1756-8692

Keywords

Article
Publication date: 1 July 2006

N.M. Bujurke, N.B. Naduvinamani, Syeda Tasneem Fathima and S.S. Benchalli

The aim of this paper is to investigate the effect of surface roughness on the squeeze film characteristics of long porous partial journal bearings with couple stress fluids as…

Abstract

Purpose

The aim of this paper is to investigate the effect of surface roughness on the squeeze film characteristics of long porous partial journal bearings with couple stress fluids as lubricant.

Design/methodology/approach

The Stokes couple stress fluid model is included to account for the additives effects of lubricant. The Christensen's stochastic method developed for the hydrodynamic lubrication of rough surfaces is used to derive the stochastic Reynolds type equation accounting for the surface roughness and couple stresses. In the context of Christensen's stochastic theory for the hydrodynamic lubrication of rough surfaces, two types of one‐dimensional surface roughness (longitudinal and transverse) patterns are considered. The non‐linear first order differential equation governing the journal center movement is solved numerically by using the fourth order R‐K method.

Findings

From the numerical computations of the results, it is found that, the effect of couple stresses is to increase the load carrying capacity and also the response time. The effect of surface roughness is to increase (decrease) the load carrying capacity and the response time for transverse (longitudinal) roughness pattern. However, the effect of permeability parameter is to decrease the load carrying capacity and also to decrease the response time as compared to the solid case.

Originality/value

The original findings on the combined effects of surface roughness and couple stresses on the squeeze film characteristics of long porous partial journal bearing are of use to the bearing designers.

Details

Industrial Lubrication and Tribology, vol. 58 no. 4
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 8 April 2014

Neminath Bhujappa Naduvinamani and Mareppa Rajashekar

The purpose of this article is to analyse the effects of surface roughness on the magneto-hydrodynamic (MHD) squeeze-film characteristics between a sphere and a porous plane…

Abstract

Purpose

The purpose of this article is to analyse the effects of surface roughness on the magneto-hydrodynamic (MHD) squeeze-film characteristics between a sphere and a porous plane surface, which have not been studied so far.

Design/methodology/approach

The analytical model takes into account the effect of porosity by assuming that the flow in the porous matrix obeys modified Darcy's law. The stochastic MHD Reynold's type equation is derived by using the Christensen's stochastic method developed for hydrodynamic lubrication of rough surfaces. Two types of one-dimensional surface roughness (radial and azimuthal) patterns are considered.

Findings

The expressions for the mean MHD squeeze-film pressure and mean load-carrying capacity are obtained numerically. The results are shown graphically for selected representative parametric values. It is found that the response time increases significantly for the MHD case as compared to the corresponding non-conducting lubricants. The effect of roughness parameter is to increase/decrease the load-carrying capacity and the response time for azimuthal/radial roughness patterns as compared to the smooth case. Also, the effect of porous parameter is to decrease the load-carrying capacity and response time as compared to the solid case.

Originality/value

In this paper, an attempt has been made to analyse the combined effects of surface roughness and permeability on the MHD squeeze-film characteristics between a sphere and a plane surface.

Details

Industrial Lubrication and Tribology, vol. 66 no. 3
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 17 August 2010

Paresh Indubhai Andharia and Gunamani Deheri

The paper aims to improve upon the performance of a squeeze film formed by a magnetic fluid between longitudinally rough conical plates.

Abstract

Purpose

The paper aims to improve upon the performance of a squeeze film formed by a magnetic fluid between longitudinally rough conical plates.

Design/methodology/approach

The objectives are achieved by mathematically modeling a magnetic fluid‐based squeeze film between longitudinally rough conical plates. The roughness of the bearing surface is modeled by a stochastic random variable with non‐zero mean, variance and skewness. The standard approach is to solve associated Reynold's equation which is stochastically averaged with respect to the random roughness parameter. The scope of this paper is the industrial applications with regard to enhanced performance of the bearing system.

Findings

The findings indicate that the performance of the bearing gets enhanced due to negatively skewed roughness. It is also noticed that the standard deviation increases the load carrying capacity which is unlike the case of transverse surface roughness. Further, this paper suggests that there exist considerable scopes for enhancing the performance of the longitudinally rough bearing system by choosing a suitable combination of the magnetization parameter and the semi‐vertical angle of the cone.

Practical implications

From the industry point of view, this investigation will be certainly useful for improving the performance of a magnetic fluid‐based squeeze film between longitudinally rough conical plates.

Originality/value

The paper presents the improved performance of a squeeze film formed by a magnetic fluid between longitudinally rough conical plates and thereby extending the life period of the bearing system.

Details

Industrial Lubrication and Tribology, vol. 62 no. 5
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 8 April 2014

Mukesh E. Shimpi and Gunamani Deheri

The purpose of this paper is to study and analyse the behaviour of a magnetic fluid-based squeeze film between rotating transversely rough porous annular plates, taking the…

Abstract

Purpose

The purpose of this paper is to study and analyse the behaviour of a magnetic fluid-based squeeze film between rotating transversely rough porous annular plates, taking the elastic deformation into consideration.

Design/methodology/approach

The stochastic film thickness characterizing the roughness is considered to be asymmetric with non-zero mean and variance and skewness while a magnetic fluid is taken as the lubricant. The associated stochastically averaged Reynolds-type equation is solved with appropriate boundary conditions to obtain the pressure distribution, which in turn is used to derive the expression for the load-carrying capacity.

Findings

It is observed that the roughness of the bearing surfaces affects the performance adversely, although the bearing registers an improved performance owing to the magnetic fluid lubricant. Also, it is seen that the deformation causes reduced load-carrying capacity. The bearing can support a load even in the absence of flow, unlike the case of conventional lubricants.

Originality/value

The originality of the paper lies in the fact that the negative effect of porosity, deformation and standard deviation can be minimized to some extent by the positive effect of the magnetic fluid lubricant in the case of negatively skewed roughness by suitably choosing the rotational inertia and aspect ratio. This effect becomes sharper when negative variance occurs.

Details

Industrial Lubrication and Tribology, vol. 66 no. 3
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 1 February 2003

R.M. Patel and G.M. Deheri

Efforts have been directed to study the magnetic fluid based squeeze film behaviour between rotating porous circular plates with a concentric pocket. The porous housing is…

Abstract

Efforts have been directed to study the magnetic fluid based squeeze film behaviour between rotating porous circular plates with a concentric pocket. The porous housing is considered to be elastically negligibly deformable with its contact surface rough. The stochastic film thickness characterizing the roughness is assumed to be asymmetric with non‐zero mean and variance. Expressions for pressure distribution, load carrying capacity and response time are obtained in closed form. These expressions are numerically computed and the results are presented graphically as well as in tabular form.

Details

Industrial Lubrication and Tribology, vol. 55 no. 1
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 1 June 2004

G.M. Deheri, P.I. Andharia and R.M. Patel

The effect of longitudinal surface roughness on the behaviour of slider bearing with squeeze film formed by a magnetic fluid has been analysed. The roughness of the bearing…

Abstract

The effect of longitudinal surface roughness on the behaviour of slider bearing with squeeze film formed by a magnetic fluid has been analysed. The roughness of the bearing surface is modelled by stochastic random variable with non‐zero mean, variance and skewness. The concerned Reynolds' equation is stochastically averaged with respect to the random roughness parameter. Results for bearing performance characteristics such as load carrying capacity of the bearing, centre of pressure, frictional force and coefficient of friction for different values of α (mean), σ (standard deviation) and ε (measure of symmetry) are numerically computed. In order to investigate the quantitative effect of roughness on the performance characteristics, four shapes namely; plane slider, exponential slider, hyperbolic slider and secant slider for the lubricant film are considered. The results are presented in tabular form as well as graphically. It is observed that the bearing performance is significantly affected by all the three parameters characterizing the surface roughness.

Details

Industrial Lubrication and Tribology, vol. 56 no. 3
Type: Research Article
ISSN: 0036-8792

Keywords

1 – 10 of 345