Search results

1 – 10 of 52
To view the access options for this content please click here
Article

Mohammadreza Barzegaran and Osama A. Mohammed

– In this paper, modeling of the XLPE cable for electromagnetic signature study at a far distance is proposed. The paper aims to discuss these issues.

Abstract

Purpose

In this paper, modeling of the XLPE cable for electromagnetic signature study at a far distance is proposed. The paper aims to discuss these issues.

Design/methodology/approach

Due to the very small ratio of the dimensions of cables to the dimensions of the whole system, using actual geometry of the cables with all layers in this study causes deformation of the cable's model. Therefore, multi-dipole modeling is used for modeling the cables.

Findings

This model includes specific voltages and currents in lines and nodes, respectively. Radiated electric and magnetic fields at a far distance are selected as the index of appropriateness of the model.

Originality/value

In order to investigate the accuracy of the model, various configuration of the cable is studied. Additionally, coupling of the cable with an electrical machine is investigated. They all show that the equivalent models can be used in place of the actual model for signature studies.

Details

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, vol. 33 no. 1/2
Type: Research Article
ISSN: 0332-1649

Keywords

To view the access options for this content please click here
Article

Osama A. Mohammed and Nagy Y. Abed

This paper seeks to present a fully digital, real‐time (RT) hardware‐in‐the‐loop (HIL) simulator on PC‐cluster, of electric systems and drives for research and education…

Abstract

Purpose

This paper seeks to present a fully digital, real‐time (RT) hardware‐in‐the‐loop (HIL) simulator on PC‐cluster, of electric systems and drives for research and education purposes; to use the developed system to conduct several motor drives implementation and to evaluate the motor and the control algorithm performance in RT.

Design/methodology/approach

This simulator was developed with the aim of meeting the simulation needs of electromechanical drives and power electronics systems while solving the limitations of traditional RT simulators. This simulator has two main subsystems, software and hardware. The two subsystems were coordinated together to achieve the RT simulation. The software subsystem includes MATLAB/Simulink environment, a C++ compiler and RT shell. The hardware subsystem includes FPGA data acquisition card, the control board, the sensors, and the controlled motor.

Findings

The complexity of RT implementation of motor drives is greatly reduced by utilizing this simulator. The detailed operation and implementation of this simulator are presented, together with test results and comparisons with simulated virtual environment for a permanent magnet dc and induction motors (IM). The simulator performance is adequate for both open and closed loops motor drives. The simulation time step is limited by the system Master/Target CPU's speed, the communication network type, and the complexity of the control algorithm.

Practical implications

A typical application for this system is to select and evaluate the performance of electric motors for a hybrid electric vehicle in a real vehicle environment without actually installing that component in the real vehicle.

Originality/value

The use of the developed RT simulator to achieve HIL simulation allows rapid prototyping, converter‐inverter topologies testing, motors testing, and control strategies evaluation. The transition from simulated virtual environment to the HIL mode can be performed by replacing the model of the physical system (e.g. motor) with the DAQ blocks to represent the channels connected to the physical system sensors. The use of a single environment for both simulation and HIL control provides a quick experimentation and performance comparison between the real and simulated systems.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 27 no. 4
Type: Research Article
ISSN: 0332-1649

Keywords

Abstract

Details

International Journal of Health Care Quality Assurance, vol. 22 no. 6
Type: Research Article
ISSN: 0952-6862

Keywords

Content available
Article

Abstract

Details

Disaster Prevention and Management: An International Journal, vol. 11 no. 2
Type: Research Article
ISSN: 0965-3562

To view the access options for this content please click here
Book part

Nafeez Mosaddeq Ahmed

Al-Qaeda is conventionally portrayed as a monolithic, hierarchical organization whose activities – coordinated by the network's leader Osama bin Laden – are the source of…

Abstract

Al-Qaeda is conventionally portrayed as a monolithic, hierarchical organization whose activities – coordinated by the network's leader Osama bin Laden – are the source of international terrorism today. Al-Qaeda is considered a radical tendency within the broader Islamist Salafi movement, legitimizing its terrorist operations as a global Islamist jihad against Western civilization. Al-Qaeda's terrorist activity today is considered, “blowback” from long finished CIA and western covert operations in Afghanistan.

The conventional wisdom is demonstrably false. After the Cold War, Western connections with al-Qaeda proliferated around the world, challenging mainstream conceptions of al-Qaeda's identity. Western covert operations and military – intelligence connections in strategic regions show that “al-Qaeda” is a network whose raison d’etre and modus operandi are inextricably embedded in a disturbing conglomerate of international Western diplomatic, financial, military and intelligence policies today. US, British, and Western power routinely manipulates al-Qaeda through a complex network of state-regional and human nodes. Such manipulation extended directly to the 9-11 hijackers, and thus to the events of 9-11 itself.11This paper advances an original argument based partially on research in Ahmed (2005), supplemented here with significant new data and analysis. Also see Ahmed (2002).

Details

The Hidden History of 9-11-2001
Type: Book
ISBN: 978-1-84950-408-9

To view the access options for this content please click here
Article

S.V. Raghavan and V. Balasubramaniyan

The purpose of this paper is to study the financial facilitators who provide financial muscle to terrorists.

Abstract

Purpose

The purpose of this paper is to study the financial facilitators who provide financial muscle to terrorists.

Design/methodology/approach

The methodology adopted is based on the available materials on two major terrorists groups: Al Qaeda and LTTE, who have terrorized the global community in the last two decades.

Findings

The key findings are that most financial facilitators are knowledgeable, literate and suave and who are kin of the top leadership or part of the clan/sect. Kinship is an important factor for trust worthiness, which leads to their association with the top level leadership for a decade or so, to handle aspects related to a terror group. Also, illegal fund raising/moving aspects are controlled by financial/operational heads of groups, while legal fund raising methods are handled by sympathizers.

Research limitations/implications

The methodology is based on descriptive analysis of existing materials gathered from different writings of different persons in different places, as none of the traditional approaches to the study is possible. The only possible method for analysis is a behavioural approach, and that too on a selective basis, not in total.

Practical implications

Government intelligence agencies need to strive to identify such facilitators, who in turn may lead them to the top leadership, as happened in the cases of Osama bin laden and Hambali.

Originality/value

There is no previous systematic approach which has attempted to study the financial facilitators who provide financial muscle to terrorists. The value of this paper lies in its originality of presentation of facts in a systematic fashion.

Details

Journal of Money Laundering Control, vol. 15 no. 3
Type: Research Article
ISSN: 1368-5201

Keywords

To view the access options for this content please click here
Article

Mohammed Osama Rasmy, Tarek Abdel Latif Abu Atta and Asmaa Abdelaty Mohamed Ibrahim

This study explores the best strategies for regional economic development to attract highly skilled populations, regardless of whether the region is a multisector or…

Abstract

Purpose

This study explores the best strategies for regional economic development to attract highly skilled populations, regardless of whether the region is a multisector or unisector economic hub. It also determines the development variables affecting the success of integrated regional economic hubs to achieve spatial equality, enhance economic productivity and attain environmental sustainability.

Design/methodology/approach

In addition to a qualitative analysis, this study employed quantitative techniques using SPSS software. This allowed amplification of the most significant explanatory variables affecting the weaknesses and strengths of economic hubs.

Findings

The results highlight approaches that can be used to achieve socio-economic sustainability in regional hubs. These include multisectors or main centralised hubs (smart economic regional capital), which provide new services to regions and act as a unidevelopment sector or as a regional, economic capital.

Research limitations/implications

The study analyses the effect of economic strategies and integration of natural resources and the required core services in regional economic development.

Practical implications

Case studies of successful economic hubs are discussed. The most important services proposed in such hubs promote human development and increase the standard of living.

Social implications

Integration between the hubs in a region is fundamental to attracting direct investments that can benefit the local population.

Originality/value

The results could help governments, economists and planners implement multisector developmental hubs to achieve sustainable development.

To view the access options for this content please click here

Abstract

Details

Digital Activism and Cyberconflicts in Nigeria
Type: Book
ISBN: 978-1-78756-014-7

To view the access options for this content please click here
Article

Alberto Berzoy, A. A. S. Mohamed and Osama Mohammed

The purpose of this paper is to develop a novel technique for the pre-design of a printed circuit board (PCB) of a DC-DC power converters where the placement of electric…

Abstract

Purpose

The purpose of this paper is to develop a novel technique for the pre-design of a printed circuit board (PCB) of a DC-DC power converters where the placement of electric components can cancel the electromagnetic emissions through subtractive coupling and in this sense to minimize the stray magnetic and electric fields at a specific location. For this work the location of interest is a current transducer used for control purposes positioned in the center of a DC-DC Cuk converter board as a constrain.

Design/methodology/approach

The methodology of design is based on the development of an interface software platform through MatLab script coding which interconnects the solution of a numerical analysis software and an optimization technique. The numerical analysis software is based on finite element calculations where quasi-static field analysis are performed to calculate the radiated electric and magnetic fields. The optimization technique is conducted by genetic algorithms (GAs).

Findings

The results for the proposed procedure for PCB design show a significant reduction in radiated electromagnetic (EM) field at the susceptible device in the PCB. Even when the optimization procedure is applied only for the sensor center, the field reduction is extended for a wide region around the sensor. The proposed technique not only reduces the fundamental field component but also all the harmonic contents for the electromagnetic field. It is demonstrated that it is possible to cancel the emissions by means of varying the location and orientation of the passive elements avoiding the utilization of electromagnetic interference filters and complex modulations.

Originality/value

The novelty of the design procedure falls in the fitness function programming where an interface software platform is built through MatLab scripting to connect a 3D-FE analysis and the GA. The finite element analysis address the radiated EM calculation while the GA focus in the minimization of it. This computational platform has the flexibility to be easily adapted for the PCB design of any power electronic converter where the radiated EM compliance is required as well as extended to perform emissions minimization outside or/and inside the PCB.

Details

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, vol. 34 no. 5
Type: Research Article
ISSN: 0332-1649

Keywords

To view the access options for this content please click here
Article

Ghassan H. Mardini, Rula S. Wadi and Osama A. Mah’d

The purpose of this study was to assess the suitability of International Financial Reporting Standards (IFRS) in emerging markets such as Qatar. The current research…

Abstract

Purpose

The purpose of this study was to assess the suitability of International Financial Reporting Standards (IFRS) in emerging markets such as Qatar. The current research attempts to obtain insights into the advantages and disadvantages of IFRS implementation in Qatar based on the perceptions of top management, academics in accounting and external auditors.

Design/methodology/approach

A questionnaire survey was the main tool used in this research. A total of 120 questionnaires were distributed to financial managers, academics and external auditors. Of the 97 replies (80 per cent), 91 completed questionnaires were analysed.

Findings

The results suggest that IFRS implementation is suitable for the business environment of Qatar because the adoption of IFRS provides many advantages to the Qatari business environment, regulations and stock market without incurring additional major costs. Moreover, IFRS imposes no major constraints on the business environment or Islamic social responsibility and education in Qatar.

Practical implications

The results of this research paper will help regulators in Qatar and other Gulf Cooperation Council (GCC) countries develop accounting regulations.

Originality/value

This paper provides empirical evidence of the suitability of IFRS in emerging markets in general and the GCC region in particular and enhances the level of understanding of IFRS worldwide.

Details

Accounting Research Journal, vol. 32 no. 4
Type: Research Article
ISSN: 1030-9616

Keywords

1 – 10 of 52