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Many of my research papers are available to download from this site. If you are unable to get a f... more Many of my research papers are available to download from this site. If you are unable to get a full text copy please try to obtain it from your university library. Most librarians are happy to help, particularly if you have the full citation of the paper.
Try also Google scholar and research gate.
I was involved in the production of over 100 papers and not all are listed here. However, much of the work documented is that of PhD students. The papers document the development of the research. Whilst there is some novel aspect to each paper you will find that there is also some overlap and so you will most likely find the results you are looking for by searching by the co-authors.

My partial CV and a list of publications

A list of thesis titles for students I have supervised and a few of the thesis titles that I have... more A list of thesis titles for students I have supervised and a few of the thesis titles that I have examined at Bradford and other universities.

Teaching Documents by John Mellor

A different version of my CV

Papers by John Mellor

Computer Integrated Manufacturing Systems

The paper presents a description ~[~ work in progress at the University ¢?f Durham, U K, on the p... more The paper presents a description ~[~ work in progress at the University ¢?f Durham, U K, on the performance evaluation of industrial data networks. Communications for CI M have aroused a great deal of interest in recent years, and there has been much speculation about the ideal strategy .for industrial networking. Completely integrated approaches such as the Manufacturing Automation Protocol (MAP) have generated a mixed response .from users, while other standards (e.9. those ]or field buses) address only a limited area of the total CIM environment. Researchers at Durham are investigating hierarchical structures ~?[" networks .[`or use in industry. This method may involve the utilization of a d!'fJerent network at each conceptual level ~1" the CIM jactory. For example, a field bus may be used at the lowest level (device level) to connect sensors and actuators, while a baseband MAP local area network (LAN) could be used at the next higher level (cell level). The choice of the appropriate communication method at each level is determined by the nature ~1 the traffic ./low. which varies throuqhout the factory. Research is concentrated specifically on the per/`ormance (?f these hierarchies to be evaluated using computer simulation techniques. Such studies are essential to determine the suitability ~71 d![lerent combinations ~[~ networks .~r d(flerent industrial situations. It is expected that the work will lead to a method ~/ automating the industrial communications design process. With this in mind graphical interl'aces to the simulation s~?ltware have been developed in order that t'isual representations ~?[ factory communication operations may assist mana.qers and process planners in their understanding ~[ the issues involved..4fter reviewing current networking strate.qies, the paper discusses the above in more detail, and as an example describes a token ring LAN simulator, showing how it can be incorporated into the hierarchical network simulation jiamework. Perl~wmance results are presented with screen dumps to illustrate the graphics . [?ont-end, and .future work to be carried out on the simulation system is described.

... OF STUDENT LEARNING EXPERIENCE Shafqat Hameed, Newport Business School, University of Wales, ... more ... OF STUDENT LEARNING EXPERIENCE Shafqat Hameed, Newport Business School, University of Wales, Newport, Wales, UK shafqat.hameed@newport.ac.uk Atta Badii, School of System Engineering, University of Reading, UK, atta.badii@reading.ac.uk ...

Widely accepted WLAN technology and the deploying UMTS system are two major wireless networks in ... more Widely accepted WLAN technology and the deploying UMTS system are two major wireless networks in the future. Much of interests have been involved in integrating these networks to take the advantage of both high data rate of WLAN and wide coverage area of cellular networks and supporting end to end QoS is an inevitable topic towards such a goal. In this paper, we discuss issues related to provide QoS to the integrated networks. A generic new reservation based QoS model is introduced using tight coupling architecture, which can play a key for supporting packet-switching based integrated cellular and WLAN networks.

ABSTRACT An in-depth investigation of Internet banking in Bahrain examined the factors affecting ... more ABSTRACT An in-depth investigation of Internet banking in Bahrain examined the factors affecting the adoption of this service through surveys and case studies involving both traditional and Islamic banking customers. It was found, in keeping with international literature, that there were five main factors affecting the uptake of Internet banking: lack of knowledge/awareness, trust, privacy, user-friendliness and security, and it was concerns with the latter that were identified as the major barrier in this study. As well as the five factors identified in the international research in this field, an additional aspect that was thought to influence the choice of banking services in Bahrain was also identified: This is related to what is locally referred to as “wasta,” the social networks and personal connections important in the Arab world in conducting business.

A study was made to identify the reasons for the apparent low uptake of Internet banking or e-ban... more A study was made to identify the reasons for the apparent low uptake of Internet banking or e-banking in the Kingdom of Bahrain compared to other similar countries. It was found that perceptions of security or trust of the Internet banking system were a barrier across a wide demographic range of customers. After extensive consideration of biometrics as a means to increase trust in Internet banking it was found that the actual situation was more complicated and a model has been developed to capture the environmental and other factors that influence decision making. A novel component of this ecological model is the inclusion of 'wasta' or the cultural and social influences that impact a person's decisions.

ABSTRACT Cluster based routing protocols are widely used in sensor networks. The need to increase... more ABSTRACT Cluster based routing protocols are widely used in sensor networks. The need to increase network life time or data throughput has led to the development of new protocols. This paper describes the combination of two novel protocols in an attempt to increase the network lifetime or data throughput as required by the network application

The Trilogy project is a collaborative research project between the Universities of Durham and St... more The Trilogy project is a collaborative research project between the Universities of Durham and Strathclyde and Queen Mary College London. The project aims to demonstrate the feasibility of pooling the resources and expertise of research groups at the three institutions in a 'virtual laboratory'. The laboratory will be used to support research training and collaborative working between the sites. This

2011 UkSim 13th International Conference on Computer Modelling and Simulation, 2011

Abstract In wireless sensor networks, sensor nodes have a limited power resource. The energy cons... more Abstract In wireless sensor networks, sensor nodes have a limited power resource. The energy consumed to route data from the sensor node to its destination raises as a critical issue in designing wireless sensor network routing protocols. In this paper we propose a ...

To provide end-to-end Quality of Service (QoS) support for the integrated WLAN and cellular netwo... more To provide end-to-end Quality of Service (QoS) support for the integrated WLAN and cellular networks is a challenging task, due to the various constraints, such as the unbalanced capacity of two systems, handoff from users' mobility and unreliable wireless media. In this paper, we propose a generic reservationbased QoS model for the integrated cellular and WLAN networks. It uses an adaptation mechanism to address the above issues and to support end-to-end QoS. The validity of the proposed scheme is demonstrated via simulation experiments. The performance results reveal that this new scheme can considerably improve the system resource utilization and reduce the call blocking probability and handoff dropping probability of the integrated networks while still maintaining acceptable QoS to the end users.

Tenth International Conference on Computer Modeling and Simulation (uksim 2008), 2008

Frequent handoffs in mobile IP scheme increase latency and loss of packets. Hierarchical mobility... more Frequent handoffs in mobile IP scheme increase latency and loss of packets. Hierarchical mobility management has been introduced to reduce the impact of mobility by handling local movements locally and hiding them from Home Agent. In this paper we propose a low Latency handoff scheme using location information that can reduce the handoff latency and packet loss. Every foreign agent will contain the location of their foreign agent's neighbors, and can detect the movement and the direction of the mobile host. The mobile host periodically informs its serving foreign agent of its location. The current foreign agent can know the distance between foreign agent and mobile host. Handoff latency is minimized by initiating data forwarding to the new foreign agent at the time that the mobile host becomes close to the threshold value based on the coverage area of the foreign agent. We show through simulations that the use of the proactive scheme with location information in the foreign agent allows for accomplishing Fast Handoff and reduced packet loss. Simulations results show that our scheme is more efficient other scheme, in term of packet loss and handoff delay.

Many of my research papers are available to download from this site. If you are unable to get a f... more Many of my research papers are available to download from this site. If you are unable to get a full text copy please try to obtain it from your university library. Most librarians are happy to help, particularly if you have the full citation of the paper.
Try also Google scholar and research gate.
I was involved in the production of over 100 papers and not all are listed here. However, much of the work documented is that of PhD students. The papers document the development of the research. Whilst there is some novel aspect to each paper you will find that there is also some overlap and so you will most likely find the results you are looking for by searching by the co-authors.

My partial CV and a list of publications

A list of thesis titles for students I have supervised and a few of the thesis titles that I have... more A list of thesis titles for students I have supervised and a few of the thesis titles that I have examined at Bradford and other universities.

A different version of my CV

Computer Integrated Manufacturing Systems

The paper presents a description ~[~ work in progress at the University ¢?f Durham, U K, on the p... more The paper presents a description ~[~ work in progress at the University ¢?f Durham, U K, on the performance evaluation of industrial data networks. Communications for CI M have aroused a great deal of interest in recent years, and there has been much speculation about the ideal strategy .for industrial networking. Completely integrated approaches such as the Manufacturing Automation Protocol (MAP) have generated a mixed response .from users, while other standards (e.9. those ]or field buses) address only a limited area of the total CIM environment. Researchers at Durham are investigating hierarchical structures ~?[" networks .[`or use in industry. This method may involve the utilization of a d!'fJerent network at each conceptual level ~1" the CIM jactory. For example, a field bus may be used at the lowest level (device level) to connect sensors and actuators, while a baseband MAP local area network (LAN) could be used at the next higher level (cell level). The choice of the appropriate communication method at each level is determined by the nature ~1 the traffic ./low. which varies throuqhout the factory. Research is concentrated specifically on the per/`ormance (?f these hierarchies to be evaluated using computer simulation techniques. Such studies are essential to determine the suitability ~71 d![lerent combinations ~[~ networks .~r d(flerent industrial situations. It is expected that the work will lead to a method ~/ automating the industrial communications design process. With this in mind graphical interl'aces to the simulation s~?ltware have been developed in order that t'isual representations ~?[ factory communication operations may assist mana.qers and process planners in their understanding ~[ the issues involved..4fter reviewing current networking strate.qies, the paper discusses the above in more detail, and as an example describes a token ring LAN simulator, showing how it can be incorporated into the hierarchical network simulation jiamework. Perl~wmance results are presented with screen dumps to illustrate the graphics . [?ont-end, and .future work to be carried out on the simulation system is described.

... OF STUDENT LEARNING EXPERIENCE Shafqat Hameed, Newport Business School, University of Wales, ... more ... OF STUDENT LEARNING EXPERIENCE Shafqat Hameed, Newport Business School, University of Wales, Newport, Wales, UK shafqat.hameed@newport.ac.uk Atta Badii, School of System Engineering, University of Reading, UK, atta.badii@reading.ac.uk ...

Widely accepted WLAN technology and the deploying UMTS system are two major wireless networks in ... more Widely accepted WLAN technology and the deploying UMTS system are two major wireless networks in the future. Much of interests have been involved in integrating these networks to take the advantage of both high data rate of WLAN and wide coverage area of cellular networks and supporting end to end QoS is an inevitable topic towards such a goal. In this paper, we discuss issues related to provide QoS to the integrated networks. A generic new reservation based QoS model is introduced using tight coupling architecture, which can play a key for supporting packet-switching based integrated cellular and WLAN networks.

ABSTRACT An in-depth investigation of Internet banking in Bahrain examined the factors affecting ... more ABSTRACT An in-depth investigation of Internet banking in Bahrain examined the factors affecting the adoption of this service through surveys and case studies involving both traditional and Islamic banking customers. It was found, in keeping with international literature, that there were five main factors affecting the uptake of Internet banking: lack of knowledge/awareness, trust, privacy, user-friendliness and security, and it was concerns with the latter that were identified as the major barrier in this study. As well as the five factors identified in the international research in this field, an additional aspect that was thought to influence the choice of banking services in Bahrain was also identified: This is related to what is locally referred to as “wasta,” the social networks and personal connections important in the Arab world in conducting business.

A study was made to identify the reasons for the apparent low uptake of Internet banking or e-ban... more A study was made to identify the reasons for the apparent low uptake of Internet banking or e-banking in the Kingdom of Bahrain compared to other similar countries. It was found that perceptions of security or trust of the Internet banking system were a barrier across a wide demographic range of customers. After extensive consideration of biometrics as a means to increase trust in Internet banking it was found that the actual situation was more complicated and a model has been developed to capture the environmental and other factors that influence decision making. A novel component of this ecological model is the inclusion of 'wasta' or the cultural and social influences that impact a person's decisions.

ABSTRACT Cluster based routing protocols are widely used in sensor networks. The need to increase... more ABSTRACT Cluster based routing protocols are widely used in sensor networks. The need to increase network life time or data throughput has led to the development of new protocols. This paper describes the combination of two novel protocols in an attempt to increase the network lifetime or data throughput as required by the network application

The Trilogy project is a collaborative research project between the Universities of Durham and St... more The Trilogy project is a collaborative research project between the Universities of Durham and Strathclyde and Queen Mary College London. The project aims to demonstrate the feasibility of pooling the resources and expertise of research groups at the three institutions in a 'virtual laboratory'. The laboratory will be used to support research training and collaborative working between the sites. This

2011 UkSim 13th International Conference on Computer Modelling and Simulation, 2011

Abstract In wireless sensor networks, sensor nodes have a limited power resource. The energy cons... more Abstract In wireless sensor networks, sensor nodes have a limited power resource. The energy consumed to route data from the sensor node to its destination raises as a critical issue in designing wireless sensor network routing protocols. In this paper we propose a ...

To provide end-to-end Quality of Service (QoS) support for the integrated WLAN and cellular netwo... more To provide end-to-end Quality of Service (QoS) support for the integrated WLAN and cellular networks is a challenging task, due to the various constraints, such as the unbalanced capacity of two systems, handoff from users' mobility and unreliable wireless media. In this paper, we propose a generic reservationbased QoS model for the integrated cellular and WLAN networks. It uses an adaptation mechanism to address the above issues and to support end-to-end QoS. The validity of the proposed scheme is demonstrated via simulation experiments. The performance results reveal that this new scheme can considerably improve the system resource utilization and reduce the call blocking probability and handoff dropping probability of the integrated networks while still maintaining acceptable QoS to the end users.

Tenth International Conference on Computer Modeling and Simulation (uksim 2008), 2008

Frequent handoffs in mobile IP scheme increase latency and loss of packets. Hierarchical mobility... more Frequent handoffs in mobile IP scheme increase latency and loss of packets. Hierarchical mobility management has been introduced to reduce the impact of mobility by handling local movements locally and hiding them from Home Agent. In this paper we propose a low Latency handoff scheme using location information that can reduce the handoff latency and packet loss. Every foreign agent will contain the location of their foreign agent's neighbors, and can detect the movement and the direction of the mobile host. The mobile host periodically informs its serving foreign agent of its location. The current foreign agent can know the distance between foreign agent and mobile host. Handoff latency is minimized by initiating data forwarding to the new foreign agent at the time that the mobile host becomes close to the threshold value based on the coverage area of the foreign agent. We show through simulations that the use of the proactive scheme with location information in the foreign agent allows for accomplishing Fast Handoff and reduced packet loss. Simulations results show that our scheme is more efficient other scheme, in term of packet loss and handoff delay.

In this paper we present a new TCP retransmission algorithm to recover from multiple non-congesti... more In this paper we present a new TCP retransmission algorithm to recover from multiple non-congestion(transmission) packet drops from the same TCP window. This algorithm will help end-to-end error discriminators to improve TCP perfor- mance over lossy and heterogeneous networks. The simulation results shows that the proposed algorithm has increased TCP performance over different error rates without extra load on the

2007 Wireless Telecommunications Symposium, 2007

Explicit Congestion Notifications are used to notify TCP when imminent congestion is about to hap... more Explicit Congestion Notifications are used to notify TCP when imminent congestion is about to happen. In this work we use this feature to design an error discriminator that can be added to a TCP sender to differentiate between congestion drops and drops because of wireless link failure. By distinguishing between error types, TCP can avoid unnecessary cuts of congestion window

The 2007 International Conference on Next Generation Mobile Applications, Services and Technologies (NGMAST 2007), 2007

... Networks and Security Research Group, Department of Computing, School of Informatics, Univers... more ... Networks and Security Research Group, Department of Computing, School of Informatics, University of Bradford, UK BD7 1DP, Bradford, West Yorkshire, United Kingdom {Aaalhaj, Jemellor, Iuawan}@bradford.ac ... 2. Packets with private source or private destination IP address. ...

Providing a high bandwidth connection for end users anywhere and at anytime is the ultimate goal ... more Providing a high bandwidth connection for end users anywhere and at anytime is the ultimate goal for the wireless community. Integrating different access technologies is a major step towards such a goal. In a companion paper [Wang et al., 2004], a generic reservation-based QoS framework has been proposed and discussed for integrated cellular and WLAN networks. The bandwidth adaptation algorithm, as the key factor of the proposed framework, decides how to adjust the QoS to maintain ongoing sessions at a satisfactory level with efficient use of the system resources. In this paper we propose a novel QoS management scheme based on per class degradation. Its performance has been compared with the previous proposed adaptation algorithm. The results show that the new scheme generally performs better since it provides better fairness and faster calculation, whereas the previous algorithm, based on per flow, can utilise the system bandwidth more efficiently.