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Article
Publication date: 10 December 2020

Muhammad Haris, Muhammad Shafiq, Adyda Ibrahim and Masnita Misiran

The purpose of this paper is to develop some interesting results in the field of chaotic synchronization with a new finite-time controller to reduce the time of convergence.

Abstract

Purpose

The purpose of this paper is to develop some interesting results in the field of chaotic synchronization with a new finite-time controller to reduce the time of convergence.

Design/methodology/approach

This article proposes a finite-time controller for the synchronization of hyper(chaotic) systems in a given time. The chaotic systems are perturbed by the model uncertainties and external disturbances. The designed controller achieves finite-time synchronization convergence to the steady-state error without oscillation and elimination of the nonlinear terms from the closed-loop system. The finite-time synchronization convergence reduces the hacking duration and recovers the embedded message in chaotic signals within a given preassigned limited time. The free oscillation convergence keeps the energy consumption low and alleviates failure chances of the actuator. The proposed finite-time controller is a combination of linear and nonlinear parts. The linear part keeps the stability of the closed-loop, the nonlinear part increases the rate of convergence to the origin. A generalized form of analytical stability proof is derived for the synchronization of chaotic and hyper-chaotic systems. The simulation results provide the validation of the accomplish synchronization for the Lu chaotic and hyper-chaotic systems.

Findings

The designed controller not only reduces the time of convergence without oscillation of the trajectories which can run the system for a given time domain.

Originality/value

This work is originally written by the author.

Details

Multidiscipline Modeling in Materials and Structures, vol. 17 no. 3
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 16 August 2022

Muhammad Faisal Malik, Qurat-ul-Ain Burhan, Shazia Akhtar and Muhammad Shafiq

The research intended to identify the impact of employee exploitation on knowledge-sharing behavior and withdrawal, not in isolation, but by taking psychological ownership…

Abstract

Purpose

The research intended to identify the impact of employee exploitation on knowledge-sharing behavior and withdrawal, not in isolation, but by taking psychological ownership and psychological detachment as mediating variables. Moreover, the research aims to identify optimism’s moderating role concerning employee exploitation and psychological ownership. The research aims to suggest the management implementation of the human-centric business process and, subsequently, management to obtain maximum output from employees.

Design/methodology/approach

Positivism research philosophy followed by a deductive approach is adopted to meet the objectives of the current study. Survey techniques with a self-administrated questionnaire were used to collect data from employees working in public sector organizations. Moreover, 255 employees with the highest qualification were shortlisted to capture the variables’ impact. Data analysis was done by using SEM-AMOS approaches and obtained structural and path models to test the formulated hypotheses.

Findings

Results suggested that employee exploitation has a significant relationship with withdrawal, and psychological detachment mediates the relationship. The other path suggested the insignificant role of optimism as a moderator in the relationship between employee exploitation and psychological empowerment. However, psychological empowerment fully mediates the relationship between employee exploitation and knowledge-sharing behavior.

Originality/value

A plethora of research is available on employee exploitation; however, the current research is first to capture both positive and negative paths in public sector organizations. It provides clear insights for managers to reformulate and reanalyze their organizational policies to get employees' positive attitudinal and behavioural outcomes.

Details

Business Process Management Journal, vol. 28 no. 4
Type: Research Article
ISSN: 1463-7154

Keywords

Article
Publication date: 10 June 2021

Muhammad Sami Ur Rehman, Muhammad Tariq Shafiq and Muneeb Afzal

The coronavirus disease 2019 (COVID-19) pandemic has affected the global economy and, thus, the global construction industry. This paper aims to study the impact of…

2165

Abstract

Purpose

The coronavirus disease 2019 (COVID-19) pandemic has affected the global economy and, thus, the global construction industry. This paper aims to study the impact of COVID-19 on construction project performance in the United Arab Emirates (UAE).

Design/methodology/approach

This study adopted a qualitative and exploratory approach to investigate the impact of COVID-19 and its policies on project performance in the UAE construction industry in critical areas of the project management body of knowledge (e.g. schedule, cost, resources and contracts). Semi-structured interview questions were asked from ten construction professional to obtain valuable insights into the pandemic’s effects on the UAE construction industry and the effectiveness of policies implemented to rectify the damage and identify the industry’s new normal.

Findings

The findings indicate that the construction industry faced several challenges such as schedule delays, disrupted cashflows, delayed permits, approvals and inspections, travel restrictions, serious health and safety concerns, material and equipment shortages, among others which hindered the timely delivery of construction projects. It also indicates that efforts made by the government institutions and the construction industry of the UAE such as economic support programs, digitization of processes, fee and fine waivers, health facilities, among other statutory relaxations proved effective in supporting the construction industry against the adverse effects of the pandemic.

Research limitations/implications

The research findings are limited to the literature review and ten semi-structured interviews seeking an expert’s opinion from industry professionals working in the UAE construction industry. The research team did not get access to project documents, contracts and project progress reports which may be required to validate the interview findings, and to perform an in-depth analysis quantifying the impact of COVID 19 on construction projects performance, which is a limitation of this research.

Practical implications

The implication is that, owing to the imposed lockdowns and strict precautionary measures to curb the rapid spread of the pandemic, smooth execution of the construction project across the country was affected. The government institutions and stakeholders of the construction projects introduced and implemented various techniques and solutions which effectively handled the implications of the COVID-19 pandemic on the construction industry of the UAE.

Originality/value

This study has identified the challenges faced by the construction industry of the UAE in the context of the management of project schedule, project cost, construction contracts, health and safety of construction employees and other related aspects of the construction projects. This study also identified the techniques and solutions adopted by various public and private institutions of the country and their implications on construction projects. Therefore, this study provides guidelines for policymakers and future research studies alike.

Details

Journal of Engineering, Design and Technology , vol. 20 no. 1
Type: Research Article
ISSN: 1726-0531

Keywords

Article
Publication date: 19 December 2019

Muhammad Umar, Moin Akhtar, Muhammad Shafiq and Zia-Ur-Rehman Rao

This study aims to explore the impact of monetary policy on house prices in Pakistan.

Abstract

Purpose

This study aims to explore the impact of monetary policy on house prices in Pakistan.

Design/methodology/approach

This study uses monthly time-series data of house prices, monetary policy, inflation and stock market index ranging from January 2011 to December 2016. All the series were checked for stationarity by using augmented Dickey–Fuller test, and lag length of 11 was decided on the basis of Schwert’z rule of thumb. Vector autoregressive (VAR) model was used because the series were not co-integrated.

Findings

The analysis revealed that monetary policy significantly affects house prices in Pakistan. Tight monetary policy results in lower house prices and vice versa. The relationship between monetary policy and house prices is unidirectional. The study also finds that higher inflation also leads to soaring house prices, but the variation in stock market index does not affect house prices.

Originality/value

To the best of authors’ knowledge, none of the existing studies explores the impact of monetary policy on house prices in Pakistan. The findings help investors and policy makers to understand the relationship between monetary policy and house prices to make better decisions.

Details

International Journal of Housing Markets and Analysis, vol. 13 no. 3
Type: Research Article
ISSN: 1753-8270

Keywords

Open Access
Article
Publication date: 12 April 2018

Umar Muhammad, Shazad Khurram and Shafiq Muhammad

4212

Abstract

Details

PSU Research Review, vol. 2 no. 1
Type: Research Article
ISSN: 2399-1747

Content available
Article
Publication date: 13 February 2018

Muhammad Shafiq, Maryam Ayoub and Shahzad Khurram

385

Abstract

Details

Society and Business Review, vol. 13 no. 1
Type: Research Article
ISSN: 1746-5680

Article
Publication date: 20 March 2020

Muhammad Shafiq and Kullapa Soratana

purpose of this study is to present a Lean Readiness Assessment Model (LRAM) for assessing the readiness of Humanitarian Organizations (HO) for adopting Lean Management…

Abstract

Purpose

purpose of this study is to present a Lean Readiness Assessment Model (LRAM) for assessing the readiness of Humanitarian Organizations (HO) for adopting Lean Management (LM) (Johanson et al.) practices. Literature reveals that implementation of LM itself is a cost and most organizations have failed to adopt LM techniques due to a non-readiness status and a non-supportive organizational culture. This situation indicates that the assessment of organizations' readiness before implementation of lean techniques is necessary.

Design/methodology/approach

This was an empirical quantitative study. Based on a synthesis of the literature, a conceptual model was developed by identifying seven critical success factors (CSFs). The CSFs were validated by HO professionals via a questionnaire-based survey. The data from the responses were analysed by applying partial least square structured equation modelling (PLS-SEM) using the SmartPLS3 software.

Findings

A proven LRAM was constructed that consists of CSFs (independent and mediating variables), which have reflected positive coefficients and significant t >1.96 and p < 0.05 values. The CSFs that are significant include process management, planning and control management, customer relationship management, human resource management, communication and coordination management and a positive organizational culture. The CSFs of supplier relationship and top management and leadership had insignificant t and p values and were dropped from the final LRAM.

Originality/value

This is a unique and rare study in its nature which developed LRAM for HO sector. The contribution of this model is to improve the efficiency and sustainability (economic and social aspects) of an HO under scarce resource conditions.

Article
Publication date: 22 March 2013

Muhammad Nadeem Asghar, Javaid Akhtar, Muhammad Shafiq, Iram Nadeem, Muhammad Ashfaq and Sammia Shahid

The cowpea plant, being affordable and protein‐rich, is considered poor man's meat. The aim of this paper is to undertake a detailed investigation regarding in vitro total…

Abstract

Purpose

The cowpea plant, being affordable and protein‐rich, is considered poor man's meat. The aim of this paper is to undertake a detailed investigation regarding in vitro total antioxidant capacity (TAC) and chemical constituents of the vegetable oils from seeds of this plant, taking its nutritional value into consideration.

Design/methodology/approach

Vegetable oils of different indigenous cowpea varieties were obtained using soxhelt extraction assembly and subjected to GC‐MS analyses and various antioxidant assays including 2,2′‐azinobis(3‐ethylbenzothiazoline‐6‐sulpohonic acid) (ABTS) radical cation scavenging, ferr, 2.2′‐diphenyl‐1‐picrylhydrazil (DPPH) radical scavenging, total phenolic contents (TPC), lipid peroxidation inhibition, and iron chelation activity.

Findings

Various chemical constituents including different hydrocarbons, tocopherols, ketones, fatty esters, estragole and cedrene were identified. TPCs were found to be 5.439, 5.7279, 7.6126, 6.7573 and 10.0591 mg/L gallic acid equivalent for S.A. Dandy, Elite, White Star, CP‐386 and FBD Rawan varieties, respectively. Employing ABTS radical decoloration assay a significant linear correlation (R2=0.997, 0.996, 0.997, 0.996 and 0.997 for S.A. Dandy, Elite, White Star, CP‐386 and FBD Rawan varieties, respectively) was found between the percent inhibition of ABTS radical cation and the amount of vegetable oils. The percent inhibition of the Fe(II)‐Ferrozine complex formation was found to be 29.45, 53.76, 82.91, 86.59 and 57.87 for the same varieties, respectively.

Originality/value

GC‐MS and standard in vitro antioxidative capacity analyses data clearly demonstrated the potency of the cowpea as antioxidant and radical scavenger plant which may be used as a good source of natural antioxidants. The plant seeds may prove a better and cost‐effective substitute of expensive food items.

Details

Nutrition & Food Science, vol. 43 no. 2
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 15 February 2021

Liaquat Ali Lund, Zurni Omar and Ilyas Khan

The purpose of this study is to find the multiple branches of the three-dimensional flow of Cu-Al2 O3/water rotating hybrid nanofluid perfusing a porous medium over the…

Abstract

Purpose

The purpose of this study is to find the multiple branches of the three-dimensional flow of Cu-Al2 O3/water rotating hybrid nanofluid perfusing a porous medium over the stretching/shrinking surface. The extended model of Darcy due to Forchheimer and Brinkman has been considered to make the hybrid nanofluid model over the pores by considering the porosity and permeability effects.

Design/methodology/approach

The Tiwari and Das model with the thermophysical properties of spherical particles for efficient dynamic viscosity of the nanoparticle is used. The linear similarity transformations are applied to convert the partial differential equations into ordinary differential equations (ODEs). The system of governing ODEs is solved by using the three-stage Lobatto IIIa scheme in MATLAB for evolving parameters.

Findings

The system of governing ODEs produces dual branches. A unique stable branch is identified with help of stability analysis. The reduced heat transfer rate has been shown to increase with the reduced ϕ2 in both branches. Further, results revealed that the presence of multiple branches depends on the ranges of porosity, suction and stretching/shrinking parameters for the particular value of the rotating parameter.

Originality/value

Dual branches of the three-dimensional flow of Cu-Al2 O3/water rotating hybrid nanofluid have been found. Therefore, stability analysis of the branches is also conducted to know which branch is appropriate for the practical applications. To the best of the authors’ knowledge, this research is novel and there is no previously published work relevant to the present study.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. 31 no. 12
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 1 December 2005

Fida Mohammad and Paul Conway

The paper seeks to document attitudes and patterns of behavior in Pakistan's criminal justice system over the past 30 years.

2080

Abstract

Purpose

The paper seeks to document attitudes and patterns of behavior in Pakistan's criminal justice system over the past 30 years.

Design/methodology/approach

A conceptual discussion and approach are taken following extensive interviews, conducted in 1992‐1993, with members of the police, judges, civil service bureaucrats, torture victims, psychiatrists, political detainees, criminal lawyers and others.

Findings

The patterns of behavior are longstanding and deeply rooted despite periodical changes in political leadership. Cynicism about law enforcement is widespread throughout the country and much crime goes unreported as a result. There is a lack of faith and support for police officials and legal safeguards for criminal suspects are often ignored.

Originality/value

The conditions in Pakistan's criminal justice system are explained theoretically with reference to the concept of hegemony in Pakistan's prevailing political culture.

Details

Policing: An International Journal of Police Strategies & Management, vol. 28 no. 4
Type: Research Article
ISSN: 1363-951X

Keywords

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