• The 2013 Electronics and Telecommunications Research Seminar Series: 12th Workshop Proceeedings.

      Sheriff, Ray E. (10/04/2013)
      This is the twelfth workshop to be organised under the postgraduate programmes in electrical and electronic engineering (EEE). In total, thirty-four papers from forty-nine submissions have been selected for the Proceedings. The Proceedings comprises eleven themes, which reflect today's research agenda.
    • Design of Power Efficient Power Amplifier for B3G Base Stations.

      Hussaini, Abubakar S.; Gwandu, B.A.L.; Abd-Alhameed, Raed A.; Rodriguez, Jonathan (11/11/2010)
      Fourth generation systems require the use of both amplitude and phase modulation to efficiently utilize the available spectrum and to obtain high data rates, hence imposing stringent requirements on the power amplifier in terms of efficiency and linearity and requires the power amplifier to operate linearly and efficiently. The B3G base station transceiver Doherty power amplifier was designed to operate over the frequency range of 3.47GHz to 3.53GHz mobile WiMAX band using Freescale¿s N-Channel Enhancement-Mode Lateral MOSFET Transistor, MRF7S38010HR3; The performances of the Doherty amplifier are compared with that of the conventional Class AB amplifier. The results of 43 dBm output power and 66% power added efficiency are achieved.
    • Evaluating the case for employing E-Portfolio tools during the Final Year Engineering Project

      Sheriff, Ray E.; Ong, Felicia Li Chin (12/04/2012)
      The Final Year Project is an integral part of an engineering degree programme. At the University of Bradford's School of Engineering, Design and Technology (SoEDT), the project spans two semesters and is worth 30 credits or the equivalent of 300 hours of work. A student works under the guidance of a supervisor on a particular topic that usually involves some experimental activity, and is required to apply a variety of personal and technical skills as part of the project process. At Bradford, the Final Year Engineering Project (FYEP) concludes with summative assessment, in terms of a technical report and poster presentation, both of which occur at the end of the second semester. For most students the FYEP represents a new way of working, while the nature of supervision can vary from hugely rewarding to very disappointing. There is possible scope for improving the FYEP experience, from the perspectives of supervisor and student, through the use of e-portfolio tools, which make use of the Web to provide the means for maintaining communication, monitoring progress and developing a student¿s skills portfolio. If e-portfolio tools are to be considered as a possible integral part of the FYEP process, then an appreciation of the current FYEP experience among students and supervisors must first be gained. In this paper, quantitative and qualitative results are presented based on face-to-face semi-structured interviews with academic supervisors and responses to on-line questionnaires from supervisors and final year engineering students at the SoEDT. The results provide an insight into the practices and techniques employed as part of the FYEP, and identify where training is needed to develop particular project skills. The results provide a basis for the development of an e-portfolio application that supports the FYEP experience, which is introduced to conclude the paper.
    • Design of Energy Efficient Power Amplifier for 4G User Terminals.

      Hussaini, Abubakar S.; Abd-Alhameed, Raed A.; Rodriguez, Jonathan (12/12/2010)
      This paper describes the characterization and design of energy efficient user terminal transceiver power amplifier. To reduce the design of bulky external circuitry, the load modulation technique is employed. The design core is based on the combination of Class B and Class C that includes quarter wavelength transformer at the output to perform the load modulation. The handset transceiver for this power amplifier is designed to operate over the frequency range of 3.4GHz to 3.6GHz mobile WiMAX band. The performances of the load modulation amplifier are compared with conventional Class B amplifier. The results of 30dBm output power and 53% power added efficiency are achieved.
    • Investigation of the Applicability of an e-Portfolio Tool to Support Final Year Engineering Projects.

      Sheriff, Ray E.; Ong, Felicia Li Chin (14/03/2012)
      This project investigated the extent to which e-portfolio tools can be applied to final year engineering projects with a view to supporting the experience from the perspective of supervisor and student respectively. E-portfolio tools allow students to generate, store and share evidence, minute meetings and record reflections as well as helping them to develop generic professional engineering skills. The research methodology combined qualitative and quantitative techniques. Semi-structured face-to-face interviews with eight supervisors and online questionnaires completed by 13 supervisors and 31 students provided the basis for the research. Training on the university¿s e-portfolio tool was provided for 19 members of staff, while a seminar introducing the project to the final year cohort was attended by 33 students. To conclude, an e-portfolio application was made available to students.
    • The 2010 Electronics and Telecommunications Research Seminar Series: 9th Workshop Proceedings

      Sheriff, Ray E. (University of Bradford, 14/04/2010)
      This is the ninth workshop to be organised under the postgraduate programmes in electrical and electronic engineering (EEE). The workshop concludes the Research Seminar Series, which has provided a platform for disseminating the latest research activities in related technologies through its weekly seminars. The EEE courses cover a broad range of technologies and this is reflected in the variety of topics presented during the workshop. In total, forty-four papers have been selected for the proceedings, which have been divided into eight sections. The workshop aims to be as close to a `real¿ event as possible. Hence, authors have responded to a Call for Papers with an abstract, prior to the submission of the final paper. This has been a novel experience for many, if not all of the contributors. As usual, authors have taken up the challenge with enthusiasm, resulting in a collection of papers that reflects today¿s research challenges.
    • An Investigation into the use of E-Portfolio Tools to Enhance the Final Year Engineering Project Experience. [Poster presentation].

      Sheriff, Ray E.; Ong, Felicia Li Chin (14/06/2011)
      During the course of a Final Year Engineering Project (FYEP), students need to apply a variety of skills, including time management, project management and personal reflection. Students can use logbooks to demonstrate progress to their supervisors, who may then provide feedback through formative assessment. Within the School of Engineering, Design and Technology, the FYEP concludes with an assessed report and poster presentation. The University provides all students with access to an e-portfolio tool (PebblePAD). E-portfolio tools allow students to generate, store and share evidence, minute meetings and record reflections. There is possible scope for enhancing the FYEP experience through the use of e-portfolio tools by, for example, maintaining communication, monitoring progress and providing feedback. The poster provides an introduction to the project, highlighting a sample of survey results from FYEP students and supervisors, respectively.
    • Investigation of the Applicability of an E-Portfolio Tool to Support Final Year Engineering Projects. [Poster presentation].

      Sheriff, Ray E.; Ong, Felicia Li Chin (15/09/2011)
      The Royal Academy of Engineering, together with the Higher Education Academy Engineering Subject Centre, organised one of the two Dissemination Seminars at University of Bradford. This event was for the project leaders of funded engineering projects under their three calls, opened between March 2010 and March 2011.
    • Approach Towards Energy Efficient Power Amplifier for 4G Communications.

      Hussaini, Abubakar S.; Abd-Alhameed, Raed A.; Rodriguez, Jonathan (16/11/2010)
      The biggest challenge for future 4G systems is the need to limit the energy consumptions of battery-powered and base station devices, with the aim to prolong their operational time and avoid active cooling in the base station. The green wireless communications requires research in areas such as energy efficient RF front end, MAC protocol, networking, deployment, operation, and also the integration of base station with renewable power supply. In this paper, the design concept of energy efficient RF front end is considered in terms of RF power amplifiers at which it represents the workhorse of modern wireless communication systems and inherently nonlinear. The approach of output power back off is to amplify the signal at the linear region to avoid distortion, but this approach suffers from significant reduction in efficiency and power output. To boost the efficiency at wide range of output power and keep the same margin for signal with high crest factor, the load modulation technique with new offset line are employed to operate over the frequency range of 3.4GHz to 3.6GHz band. The performances of load modulation power amplifier are compared with balanced amplifier. The results of 42dBm output power and 62% power added efficiency are achieved.
    • Automated McIntosh-Based Classification of Sunspot Groups Using MDI Images

      Colak, Tufan; Qahwaji, Rami S.R. (Springer, 16/12/2007)
      This paper presents a hybrid system for automatic detection and McIntosh-based classification of sunspot groups on SOHO/MDI white-light images using active-region data extracted from SOHO/MDI magnetogram images. After sunspots are detected from MDI white-light images they are grouped/clustered using MDI magnetogram images. By integrating image-processing and neural network techniques, detected sunspot regions are classified automatically according to the McIntosh classification system. Our results show that the automated grouping and classification of sunspots is possible with a high success rate when compared to the existing manually created catalogues. In addition, our system can detect and classify sunspot groups in their early stages, which are usually missed by human observers.
    • The Compact Design of Dual-band and Wideband Planar Inverted F-L-antennas for WLAN and UWB Applications

      Hraga, Hmeda I.; See, Chan H.; Abd-Alhameed, Raed A.; Adnan, S.; Elfergani, Issa T.; Elmegri, Fauzi (17/07/2012)
      Two miniature low profile PIFLA antennas with a compact volume size of 30mm × 15mm × 8mm has presented in this paper. By applying the magnetic wall concept a reduced size dual-band and a wideband half PIFLAs for WLAN (2.4GHz/5.2GHz) and UWB applications are achieved. The dual-band antenna shows a relative bandwidth of 12% and 10.2% at ISM2400 and IEEE802.11a frequency bands respectively for input return loss less than 10dB. By carefully tuning the geometry parameters of the dual-band proposed antenna, the two resonant frequencies can be merged to form a wide bandwidth characteristic, to cover 3000MHz to 5400 MHz bandwidth (57%) for a similar input return loss that is fully covering the lower band UWB (3.1-4.8GHz) spectrum. The experimental and simulated return losses on a small finite ground plane of size 30mm × 15mm show good agreement. The computed and measured radiation patterns are shown to fully characterize the performance of the proposed two antennas.
    • Performance Evaluation Study of Intrusion Detection Systems.

      Alhomoud, Adeeb M.; Munir, Rashid; Pagna Disso, Jules F.; Al-Dhelaan, A.; Awan, Irfan U. (17/08/2011)
      With the thriving technology and the great increase in the usage of computer networks, the risk of having these network to be under attacks have been increased. Number of techniques have been created and designed to help in detecting and/or preventing such attacks. One common technique is the use of Network Intrusion Detection / Prevention Systems NIDS. Today, number of open sources and commercial Intrusion Detection Systems are available to match enterprises requirements but the performance of these Intrusion Detection Systems is still the main concern. In this paper, we have tested and analyzed the performance of the well know IDS system Snort and the new coming IDS system Suricata. Both Snort and Suricata were implemented on three different platforms (ESXi virtual server, Linux 2.6 and FreeBSD) to simulate a real environment. Finally, in our results and analysis a comparison of the performance of the two IDS systems is provided along with some recommendations as to what and when will be the ideal environment for Snort and Suricata.
    • An evaluation of students' and lecturers' use of technologies: an engineering case study.

      Sheriff, Ray E. (17/08/2012)
      The introduction in the early 1990s of the world wide web was a significant factor in the creation of a global information society, allowing new possibilities to work, entertain and communicate, from home, at the workplace or on the move. In recent years, there have been significant advances in information technology (IT), while a new generation of applications that are able to harness the power of the world wide web has been introduced under the banner of Web 2.0. The increased capabilities of IT and the nature of Web 2.0 applications have attracted interest from the academic community as a means of enhancing the delivery of higher education. This paper considers the implications of introducing technology into the higher education sector from the perspectives of academic staff and students, with particular emphasis on the use of technology and Web 2.0 applications, and the relationship between technology and teaching and learning.
    • The 2012 Electronics and Telecommunications Research Seminar Series: 11th Workshop Proceeedings.

      Sheriff, Ray E. (18/04/2012)
      This is the eleventh workshop to be organised under the postgraduate programmes in electrical and electronic engineering (EEE). In total, thirty-five papers from sixty-seven submissions have been selected for the Proceedings. Over the past eleven years, the Research Seminar Series has provided a snapshot of the research agenda. In this, the 11th issue of the Workshop Proceedings, the importance of sustainable energy generation and the emerging influence of cloud computing, the growing number of applications of wireless sensors and the ubiquitous nature of the World Wide Web are in evidence.
    • Semi-rigid action of composite joints

      Davison, J.B.; Lam, Dennis; Nethercot, D.A. (1990)
      The results of a pilot series of tests, designed to investigate the influence of the presence of a composite floor slab on the performance of steel beam-to-column connections, are reported. Direct comparisons against equivalent bare steel tests show improvements in moment capacity (up to 15 times), with reinforcement anchorage being the main controlling factor. Thus joints to internal columns where the deck runs parallel to the beams and relatively small numbers of bars supplement the basic mesh reinforcement may be expected to give the best performance.
    • Classification and analyses of of coating flows

      Benkreira, Hadj; Patel, Rajnikant; Edwards, M.F.; Wilkinson, W.L. (1994)
      A classification of coating flows is presented to facilitate a fundamental approach to their study. Four categories are observed: free, metered, transfer and gravure coating flows. They are all limited by free surface(s) which make their analysis difficult. Various analytical approaches have been used and these are briefly reviewed in this paper.
    • Computer Graphics in Rapid Prototyping Technology

      Stucki, P.; Bresenham, J.E.; Earnshaw, Rae A. (1995)
    • Interaction between hollow cored floor slabs and structural steelwork

      Lam, Dennis; Elliott, K.S.; Nethercot, D.A. (1995)
    • VISINET: Collaborative 3D Visualization and Virtual Reality over Trans-European ATM Networks

      Lamotte, W.; Earnshaw, Rae A.; Van Reeth, F.; Flerackers, E.; Mena de Matos, J. (1997)
      Visinet is a trans-European 3D collaborative design project that brings together computer scientists, application developers, design specialists, and users in the context of shared environments supported by ATM networks. Experiments and trials have been conducted for the key application domains of architectural and industrial design. Different types of virtual representation and computer-supported collaborative work are applied to real-life projects between partners at different locations in Europe. Measurements of network requirements have enabled cost/benefits to be quantified. Measurements of user satisfaction and speed of completion of the design to product cycle have also been made, resulting in a greater understanding of the ways in which collaborative design environments linked by high-speed networks affect this cycle. Additional experiments are currently being conducted on the way in which an ATM backbone between principal partners in a project can be complemented with ISDN links to partners in a local area.