The Experts below are selected from a list of 213 Experts worldwide ranked by ideXlab platform
Nikolas Gardner - One of the best experts on this subject based on the ideXlab platform.
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the harold wilson government airwork services limited and the saudi arabian air Defence Scheme 1965 73
Journal of Contemporary History, 2007Co-Authors: Nikolas GardnerAbstract:This article examines the role of Airwork Services Limited in the Saudi Arabian Air Defence Scheme, a package of military aircraft, air Defences and support services provided by a consortium of British companies to the Kingdom of Saudi Arabia from 1966 to 1973. It argues that Harold Wilson's government saw the Scheme as a means of boosting British exports while maintaining good relations with Saudi Arabia, in the context of growing limitations to Britain's military presence East of Suez. Ultimately, however, Airwork, the principal service provider, proved unable to meet Saudi demands, necessitating the intervention of the British government on a scale it had originally hoped to avoid. In addition to shedding light on Anglo-Saudi relations, the article provides insights into the benefits and limitations of private military companies as tools of foreign policy.
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The Harold Wilson Government, Airwork Services Limited, and the Saudi Arabian Air Defence Scheme, 1965—73
Journal of Contemporary History, 2007Co-Authors: Nikolas GardnerAbstract:This article examines the role of Airwork Services Limited in the Saudi Arabian Air Defence Scheme, a package of military aircraft, air Defences and support services provided by a consortium of British companies to the Kingdom of Saudi Arabia from 1966 to 1973. It argues that Harold Wilson's government saw the Scheme as a means of boosting British exports while maintaining good relations with Saudi Arabia, in the context of growing limitations to Britain's military presence East of Suez. Ultimately, however, Airwork, the principal service provider, proved unable to meet Saudi demands, necessitating the intervention of the British government on a scale it had originally hoped to avoid. In addition to shedding light on Anglo-Saudi relations, the article provides insights into the benefits and limitations of private military companies as tools of foreign policy.
Irfan Awan - One of the best experts on this subject based on the ideXlab platform.
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Recommendation Based Trust Model with an Effective Defence Scheme for MANETs
IEEE Transactions on Mobile Computing, 2015Co-Authors: Antesar M. Shabut, Keshav Dahal, Sanat Kumar Bista, Irfan AwanAbstract:The reliability of delivering packets through multi-hop intermediate nodes is a significant issue in the mobile ad hoc networks (MANETs). The distributed mobile nodes establish connections to form the MANET, which may include selfish and misbehaving nodes. Recommendation based trust management has been proposed in the literature as a mechanism to filter out the misbehaving nodes while searching for a packet delivery route. However, building a trust model that adopts recommendations by other nodes in the network is a challenging problem due to the risk of dishonest recommendations like bad-mouthing, ballot-stuffing, and collusion. This paper investigates the problems related to attacks posed by misbehaving nodes while propagating recommendations in the existing trust models. We propose a recommendation based trust model with a Defence Scheme, which utilises clustering technique to dynamically filter out attacks related to dishonest recommendations between certain time based on number of interactions, compatibility of information and closeness between the nodes. The model is empirically tested under several mobile and disconnected topologies in which nodes experience changes in their neighbourhood leading to frequent route changes. The empirical analysis demonstrates robustness and accuracy of the trust model in a dynamic MANET environment.
Sayan Kumar Ray - One of the best experts on this subject based on the ideXlab platform.
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A Trust-based Defence Scheme for Mitigating Blackhole and Selective Forwarding Attacks in the RPL Routing Protocol
Australian Journal of Telecommunications and the Digital Economy, 2018Co-Authors: David Airehrour, Jairo A. Gutiérrez, Sayan Kumar RayAbstract:The routing protocol for low-power and lossy networks (RPL) has gained prominence as the standard IoT routing protocol. However, it faces like many other routing protocols diverse attacks. Many studies have been proposed to secure the RPL protocol, and simulation studies have been put forward as the main research method, while testbed experiments, though an authentic research and testing method, have been ignored. Although testbed experiments and simulation studies have their strengths and limitations, testbed techniques could be used as a verifiable validation method for simulation studies. This study is a follow up research work to validate our simulation study, which addressed Blackhole attacks in the RPL routing protocol. In addition, Selective Forwarding attacks are also addressed. It implements a testbed while embedding our Trust-based RPL protocol and the standard RPL protocol in a smart environment configuration. Based on the test experiments, we provide a proof-of-concept of the validity of our claim that our Trust-based RPL protocol provides a comprehensive Defence (simulation and testbed) against Blackhole and Selective Forwarding attacks.
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A Trust-based Defence Scheme
Australian Journal of Telecommunications and the Digital Economy, 2018Co-Authors: David Airehrour, Jairo A. Gutiérrez, Sayan Kumar RayAbstract:The routing protocol for low-power and lossy networks (RPL) has gained prominence as the standard IoT routing protocol. However, it faces like many other routing protocols diverse attacks. Many studies have been proposed to secure the RPL protocol, and simulation studies have been put forward as the main research method, while testbed experiments, though an authentic research and testing method, have been ignored. Although testbed experiments and simulation studies have their strengths and limitations, testbed techniques could be used as a verifiable validation method for simulation studies. This study is a follow up research work to validate our simulation study, which addressed Blackhole attacks in the RPL routing protocol. In addition, Selective Forwarding attacks are also addressed. It implements a testbed while embedding our Trust-based RPL protocol and the standard RPL protocol in a smart environment configuration. Based on the test experiments, we provide a proof-of-concept of the validity of our claim that our Trust-based RPL protocol provides a comprehensive Defence (simulation and testbed) against Blackhole and Selective Forwarding attacks.
Antesar M. Shabut - One of the best experts on this subject based on the ideXlab platform.
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Recommendation Based Trust Model with an Effective Defence Scheme for MANETs
IEEE Transactions on Mobile Computing, 2015Co-Authors: Antesar M. Shabut, Keshav Dahal, Sanat Kumar Bista, Irfan AwanAbstract:The reliability of delivering packets through multi-hop intermediate nodes is a significant issue in the mobile ad hoc networks (MANETs). The distributed mobile nodes establish connections to form the MANET, which may include selfish and misbehaving nodes. Recommendation based trust management has been proposed in the literature as a mechanism to filter out the misbehaving nodes while searching for a packet delivery route. However, building a trust model that adopts recommendations by other nodes in the network is a challenging problem due to the risk of dishonest recommendations like bad-mouthing, ballot-stuffing, and collusion. This paper investigates the problems related to attacks posed by misbehaving nodes while propagating recommendations in the existing trust models. We propose a recommendation based trust model with a Defence Scheme, which utilises clustering technique to dynamically filter out attacks related to dishonest recommendations between certain time based on number of interactions, compatibility of information and closeness between the nodes. The model is empirically tested under several mobile and disconnected topologies in which nodes experience changes in their neighbourhood leading to frequent route changes. The empirical analysis demonstrates robustness and accuracy of the trust model in a dynamic MANET environment.
Susan L. Hull - One of the best experts on this subject based on the ideXlab platform.
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Improving Habitat Heterogeneity on Coastal Defence Structures
Coasts Marine Structures and Breakwaters 2017, 2018Co-Authors: Alice E. Hall, Roger Jh Herbert, Susan L. Hull, Robin P. SiddleAbstract:Sea level rise and higher storm frequency is increasing the need for hard coastal Defences worldwide. The majority of these structures lack optimal habitats for intertidal species, resulting in low diversity. Here, we evaluate low-cost enhancement techniques which increase habitat heterogeneity and surface texture on different rock types. Arrays of holes and grooves inspired by ‘blast features’ produced during the quarrying process were created on both granite rock armour and limestone rock groynes in two locations in England. After 12 months the treatments were successful at attracting new species to the Defence structures and increasing the overall diversity and abundance of organisms. Mobile fauna including crabs and fish were recorded utilising the holes and grooves. Non -native species were recorded in grooves at one site but in no greater abundance than control areas. At the southern site, species known to be spreading in response to climate changes were found in both treatments but not in controls. The cost of these treatments was low in relation to that of the Defence Scheme and could be easily replicated either during or after construction. Through evaluatio n of the use of these ecological enhancement techniques on coastal structures, we suggest that they have considerable potential to enhance local patterns of biodiversity when used within large -scale Defence projects.
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Ecological enhancement techniques to improve habitat heterogeneity on coastal Defence structures
Estuarine Coastal and Shelf Science, 2018Co-Authors: Alice E. Hall, Roger Jh Herbert, J. Robert Britton, Susan L. HullAbstract:Abstract Sea level rise and higher storm frequency are increasing the need for the placement of hard coastal Defences worldwide. The majority of these Defences lack optimal habitats for intertidal species, resulting in low diversity and abundance. The construction of coastal Defences within marine protected areas (MPA) is also increasing and this study investigates ways to limit the loss of species diversity and intertidal habitat caused by installing rock armour Defence structures and other coastal developments. Arrays of holes and grooves were created on granite rock armour in the north of England at Runswick Bay, N. Yorkshire and limestone rock groynes in southern England at Boscombe, Poole Bay, Dorset. Runswick Bay is a Marine Conservation Zone (MCZ) designated for its intertidal habitat and Boscombe is located in close proximity to a Special Area of Conservation (SAC). After 12 months, the treatments had attracted new species to the Defence structures and increased the overall diversity and abundance of organisms compared to control areas. Mobile fauna including crabs and fish were also recorded utilising the holes and grooves at Boscombe. Non-native species were recorded in grooves at one site however their abundance was not significantly different to that of control areas. At the southern site, species known to be spreading in response to climate change were found in treatments but not in control areas. The cost of the installation of these enhancement techniques was low in relation to that of the Defence Scheme and could be easily incorporated before, during or after construction. Through evaluation of the use of these ecological enhancement techniques on coastal structures, it is suggested that they have considerable potential to increase biodiversity on artificial structures, particularly when used within large-scale coastal engineering Defence projects.
