Search results
1 – 10 of 26Adel Abdallah, Mohamed M. Fouad and Hesham N. Ahmed
The purpose of this paper is to introduce a novel intensity-modulated fiber optic sensor for real-time intrusion detection using a fiber-optic microbend sensor and an optical…
Abstract
Purpose
The purpose of this paper is to introduce a novel intensity-modulated fiber optic sensor for real-time intrusion detection using a fiber-optic microbend sensor and an optical time-domain reflectometer (OTDR).
Design/methodology/approach
The proposed system is tested using different scenarios using person/car as intruders. Experiments are conducted in the lab and in the field. In the beginning, the OTDR trace is obtained and recorded as a reference signal without intrusion events. The second step is to capture the OTDR trace with intrusion events in one or multiple sectors. This measured signal is then compared to the reference signal and processed by matrix laboratory to determine the intruded sector. Information of the intrusion is displayed on an interactive screen implemented by Visual basic. The deformer is designed and implemented using SOLIDWORKS three-dimensional computer aided design Software.
Findings
The system is tested for intrusions by performing two experiments. The first experiment is performed for both persons (>50 kg) in the lab and cars in an open field with a car moving at 60 km/h using two optical fiber sectors of lengths 200 and 500 m. For test purposes, the deformer length used in the experiment is 2 m. The used signal processing technique in the first experiment has some limitations and its accuracy is 70% after measuring and recording 100 observations. To overcome these limitations, a second experiment with another technique of signal processing is performed.
Research limitations/implications
The system can perfectly display consecutive intrusions of the sectors, but in case of simultaneous intrusions of different sectors, which is difficult to take place in real situations, there will be the ambiguity of the number of intruders and the intruded sector. This will be addressed in future work. Suitable and stable laser power is required to get a suitable level of backscattered power. Optimization of the deformer is required to enhance the sensitivity and reliability of the sensor.
Practical implications
The proposed work enables us to benefit from the ease of implementation and the reduced cost of the intensity-modulated fiber optic sensors because it overcomes the constraints that prevent using the intensity-modulated fiber optic sensors for intrusion detection.
Originality/value
The proposed system is the first time long-range intensity-modulated fiber optic sensor for intrusion detection.
Details
Keywords
Ferdaous Abdallah and Adel Boubaker
Although the phenomenon of the corporate social responsibility disclosure (CSRD) has derived the interest of several scholars, in recent years, the comparative studies between…
Abstract
Although the phenomenon of the corporate social responsibility disclosure (CSRD) has derived the interest of several scholars, in recent years, the comparative studies between Islamic banks (IBs) regarding CSRD quantity versus quality have not been the subject matter of studies till now. In this perspective, this chapter aims to investigate the importance given by IBs to the quality and quantity disclosure of CSR. Moreover, it seeks to explore the impact of CSRD quality and quantity on the IBs' financial performance (FP). To meet these objectives, we used a sample of 59 IBs from 2011 to 2016 in the Arab world and non-Arab world. Then, by adopting the content analysis approach, the authors constructed two CSRD indexes (quality and quantity). The empirical results indicated that IBs give more importance to the qualitative disclosure than the quantitative. Our findings will be very helpful for the policymakers and the managers of IBs because maintaining a good CSRD policy increases the capacity of IBs to deal with possible reputational events, thus protecting their profits and financial results. As far as the comparison between the Arabian and non-Arabian IBs, based on financial reports and Accounting and Auditing Organization for Islamic Financial Institutions (AAOIFI) governance standard N°7 is concerned, our study is among the first studies that provides two new CSRD indexes (quantity and quality).
Details
Keywords
Ahmed M.Z. Sayed, Sadi Assaf, Adel S. Aldosary, Mohammad A. Hassanain and Abdullatif Abdallah
The purpose of this paper is to identify the key drivers for adopting electronic bidding (e-bidding) systems in public construction projects located in Saudi Arabia.
Abstract
Purpose
The purpose of this paper is to identify the key drivers for adopting electronic bidding (e-bidding) systems in public construction projects located in Saudi Arabia.
Design/methodology/approach
Literature review was undertaken to identify the drivers of e-bidding practices. Nine drivers, classified under four categories, were identified. A questionnaire survey was developed to assess the significance of the identified drivers. Responses were obtained from 20 large contractors, classified as Grade I and II contractors in Saudi Arabia, and 12 governmental authorities, representing owners of construction projects. The drivers were ranked according to their respective significance index (SI) values. Finally, a Spearman’s rank correlation coefficient was employed to ascertain the extent to which the two parties agreed on the significance level of the drivers.
Findings
Analysis of the identified drivers revealed that the most significant driver was “reduction in the physical storage requirements of bidding paperwork.” Further, a consensus was observed with regards to the significance of the drivers. The findings of the present study highlight the strong potential of widespread e-bidding adoption in Saudi Arabia. It demonstrates the key drivers for the implementation of e-bidding through the perspective of professionals within the context of Saudi Arabia.
Originality/value
Prior to this study, no previous research has endeavored to assess the drivers of e-bidding adoption in Saudi Arabia. The adoption of e-bidding will benefit organizations through improved efficiencies, which could potentially lower construction costs, thereby contributing to economic growth and benefitting the society at large.
Details
Keywords
Mohammad A. Hassanain, Ali Iftikhar, Abdul-Mohsen Al-Hammad, Adel Alshibani, Ahmed M. Ibrahim and Abdullatif Abdallah
This paper provides an exemplary systematic conduct of post‐occupancy evaluation (POE) on higher education facilities in Saudi Arabia.
Abstract
Purpose
This paper provides an exemplary systematic conduct of post‐occupancy evaluation (POE) on higher education facilities in Saudi Arabia.
Design/methodology/approach
The research study utilized several qualitative and quantitative POE techniques which were systematically comprising (1) scoping and reviewing the facilities-related documents, (2) identification of performance indicators through the review of literature, (3) development and collection of questionnaire survey responses from stakeholders, (4) collection of physical measurements and (5) assessing the facilities by walk-throughs. Then, the data were analyzed and the findings were reported to representative samples of users through focus group meetings. Then, recommendations were drawn for improving the occupational conditions of the case study facilities.
Findings
The synthesis of literature led to three main categories of performance elements that are relevant for higher education facilities. These include technical, functional and behavioral elements, in which each of the elements has specific performance indicators, 97 in total. The research study exemplifies a systematic conduct of POE. The stakeholders' perspectives on the performance elements through surveys, measurements and walk-throughs were collected. The assessment led to recommendations toward satisfactory and quality occupation of the case study facilities.
Originality/value
This research aims to standardize POE by introducing its methods as a tool for evaluating higher education facilities and by elaborating the most prominent performance indicators for ensuring higher education core functions, namely, teaching, research and community collaboration.
Details
Keywords
Heba Mohamed Adel and Raghda Abulsaoud Ahmed Younis
This paper aims to study the impact of innovation climate (IC) on co-creating modular mass-customisation (CMMC) in terms of cost effectiveness, volume effectiveness…
Abstract
Purpose
This paper aims to study the impact of innovation climate (IC) on co-creating modular mass-customisation (CMMC) in terms of cost effectiveness, volume effectiveness, responsiveness, product modularity and collaborative assembly. Additionally, this research paper investigates the effect of IC and CMMC on the value to customer (VC) in a modular jewellery emerging market that includes international companies.
Design/methodology/approach
After conducting a comprehensive literature review, the authors suggested a conceptual framework and examined it using mixed methods approach. In addition to qualitative focus groups, questionnaires were filled – across five-point Likert scale format – through 63 depth interviews carried out with subject-matter-experts working at 14 international organisations in the Egyptian modular jewellery market. SmartPLS software was used for structural equation modelling analysis.
Findings
Results showed that CMMC positively and significantly affects VC. Furthermore, IC positively and significantly affects both CMMC and VC.
Practical implications
Recent industrial developments that can be observed in such international modular jewellery sector can be enhanced by the empirical evidence of this research regarding the importance of developing IC for more creative manufacturing approach of modular mass-customisation and better VC.
Originality/value
To the best of our knowledge, it is the first empirical study that investigates the relationship between CMMC, IC and VC in a unique jewellery market, which recently generated high customer involvement in the assembly/reassembly processes. Conceptually and empirically, it consolidates and adds to the literature of production and operations management (mass-customisation), organisational studies and innovation science (organisational climate for innovation) and applied social sciences.
Details
Keywords
Saudi leadership reshuffle.
Details
DOI: 10.1108/OXAN-DB199580
ISSN: 2633-304X
Keywords
Geographic
Topical
Deputy Crown Prince and Interior Minister Mohammed bin Nayef (55) replaces Salman's half-brother, Muqrin (69), as crown prince, making him the first of the next generation of…
Details
DOI: 10.1108/OXAN-DB199257
ISSN: 2633-304X
Keywords
Geographic
Topical
Azam Abdelhakeem Khalid and Adel M. Sarea
This paper aims to examine bases of effectiveness in internal Shariah auditing undertaken in Islamic financial institutions (IFIs).
Abstract
Purpose
This paper aims to examine bases of effectiveness in internal Shariah auditing undertaken in Islamic financial institutions (IFIs).
Design/methodology/approach
This paper is theoretical in approach taking, as its starting-point, an extensive literature review. From a general agency theory, an Islamic agency theory is articulated and then applied to ascertain attributes of internal Shariah audit effectiveness revolving around the concept of independence.
Findings
Effective internal Shariah auditing, as a mechanism of assuring Shariah compliance by IFIs, varies directly with the degree of independence enjoyed by internal Shariah auditors themselves. The research propounds that an articulated Islamic agency theory holds potential to serve as a theoretical foundation to build a multi-dimensional conceptual framework based on independence utile for evaluating internal Shariah audit effectiveness.
Research limitations/implications
Evidence is drawn strictly from secondary sources.
Practical implications
To assure effectiveness of internal Shariah auditing, IFIs ought to increase the level of independence of internal Shariah auditors.
Originality/value
Internal Shariah audit effectiveness in IFIs has not been extensively studied in comparison with both studies of external Shariah audit effectiveness in IFIs and internal audit effectiveness undertaken by conventional financial institutions. This research fills that gap.
Details
Keywords
Saudi Ambassador to Washington Adel al-Jubeir said that a ten-country coalition was supporting the military operation, code-named 'Storm of Resolve', "to protect and defend the…
Details
DOI: 10.1108/OXAN-DB198567
ISSN: 2633-304X
Keywords
Geographic
Topical
S.A. Umoren, I.B. Obot, L.E. Akpabio and S.E. Etuk
To investigate the adsorption behaviour and inhibitive effect of Vigna unguiculata (VU) extract (agricultural waste material) for aluminium corrosion in 0.5 M NaOH and H2SO4.
Abstract
Purpose
To investigate the adsorption behaviour and inhibitive effect of Vigna unguiculata (VU) extract (agricultural waste material) for aluminium corrosion in 0.5 M NaOH and H2SO4.
Design/methodology/approach
The inhibitive effect of the plant extract was assessed using weight loss method at 30 and 60oC. The trend of inhibition efficiency with temperature was used to propose the mechanism of inhibition and type of adsorption.
Findings
VU extract effectively inhibited aluminium corrosion in both alkaline and acidic media. Inhibition efficiency (I %) of the extract increased with increase in concentration of the extract and temperature. Inhibitor adsorption characteristics were approximated by Freunlich and Temkin adsorption isotherms at all the concentrations and temperatures studied. The phenomenon of chemical adsorption is proposed from the activation parameters obtained.
Research limitations/implications
The mechanistic aspect of the corrosion inhibition can be better understood using electrochemical studies such as polarization and AC impedance spectra.
Practical implications
The findings may be useful in metal surface anodizing and metal coating.
Originality/value
This paper provides new information on the possible application of VU extract as eco‐friendly inhibitor. It has not been reported elsewhere.
Details