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Articles 1 - 13 of 13
Full-Text Articles in Engineering
Lightweight Objective Quality Of Voice Estimation Through Machine Learning, Daniel Riordan
Lightweight Objective Quality Of Voice Estimation Through Machine Learning, Daniel Riordan
Theses
Communication systems are undergoing constant and rapid innovation, both at the design stage and in the field. This in turn has led to an inereasing need for fast, efficient, portable and economic methods for the testing of these systems. For voice carrying communication systems the quality of the transmitted voice that the system produces is a large factor in the overall performance rating of the system. This measure is known as the ‘Quality of Voice’ (QoV) and can be evaluated either subjectively or objectively.
Speech quality is a complex subjective phenomenon that can be best quantified by subjective testing. A …
Container Management And Monitoring Using Sensor Networks, Daniel Rogóz
Container Management And Monitoring Using Sensor Networks, Daniel Rogóz
Theses
The purpose of this project was to develop a functional prototype of a container management and monitoring system, which allows identification and tracking of shipping containers in a port terminal from the moment they enter a port to when they depart for their final destination.
Such system can significantly reduce the labor and time costs associated with organizational mistakes that can occur when containers are being on/off-loaded, moved and stacked in tiers for transfer to the rail or road network. It can be used to streamline the container transport, optimize the order of container on/off-loading and placement, as well as …
Feasibility Of Utilising Construction And Demolition Waste And Dredge Material As Landflll Liner, John David Riordan
Feasibility Of Utilising Construction And Demolition Waste And Dredge Material As Landflll Liner, John David Riordan
Theses
Construction and demolition (C&D) waste and dredge material are significant bulk waste streams in the Republic of Ireland. This thesis examines the feasibility of combining these waste streams to produce a viable novel geotechnical clay liner for landfill.
This thesis includes a literature review and a detailed study of C&D waste, dredge material and landfill liners in Ireland. The research for this thesis includes a geotechnical laboratory test programme. Samples of C&D waste and dredge material were collected and tested to establish relevant characteristics. In addition, a senes of tests were commissioned on test samples to establish their chemical and …
Design, Implementation And Evaluation Of A Networking Context Aware Policy Environment, Asanga Dhammika Udugama
Design, Implementation And Evaluation Of A Networking Context Aware Policy Environment, Asanga Dhammika Udugama
Theses
Future mobile networks are anticipated to have support to access heterogeneous access technologies. An important question in such environments is the decisions on when to use what access network. These decisions must take the users and mobile network operators’ perspectives into consideration. The operators usually have a focus of always-best-managed networks while the users have an always-best-connected focus. A key enabler of such environments is the use of policies to perform these handover decisions. These policies, which must be dynamic in nature, should be configurable when the requirements change. Policy decisions are always made based on the current context of …
Orthogonal Cutting Of Bone, Donal Mccrohan
Orthogonal Cutting Of Bone, Donal Mccrohan
Theses
The cutting of bone has been undertaken for many centuries. Research in this area is contnually progressing to achieve an efficient cutting action while reducing recovery time and rauma to the patient.
Orthogonal cutting is defined where the cutting edge of the tool is set in a position that is perpendicular to the direction of relative work or tool motion. The failure mechanisms involved in the cutting of bone, their direct relationships to cutting tool geometry and cutting direction for orthogonal cutting are not accurately defined or quantified. A study of the orthogonal cutting behaviour of bone initiated in the …
Sediment Budgets In The Irish Estuarine Environment, Kevin Motherway
Sediment Budgets In The Irish Estuarine Environment, Kevin Motherway
Theses
A sediment budget is the quantification of sediment sources and sinks for natural physical systems such as rivers and estuaries.
This thesis has developed estuarine sediment budgets for Cork Harbour, Kinsale Harbour and Youghal Harbour. The thesis includes a literature review of the properties of sediment, river and estuary related sediment transport, sediment management and sediment related legislation and the approaches used to develop a sediment budget for an estuary system.
An extensive study of riverine suspended sediments discharging to the estuaries has been undertaken. Both surface grab samples and depth integrating suspended sediment samples were collected, tested and analysed. …
Precision Coil Inspection, Karol Murphy
Precision Coil Inspection, Karol Murphy
Theses
Boston Scientific produces the Guglielmi Detachable Coil in their Cork based facility. These are used in a surgical procedure to eliminate aneurysms. The first step in the process is to form a coil by wrapping a platinum wire around a mandrel. These coils have outer diameters ranging from 190 pm to 520pm. This is called the primary wind and is inspected to find any defects introduced into the coil from the winding process. These defects may be the result of wire defects in the raw material or possibly poor handling by the operators. These primary winds are processed further to …
Elliptic Curve Cryptography Security On Restricted Mobile Devices, Debbie Mccann
Elliptic Curve Cryptography Security On Restricted Mobile Devices, Debbie Mccann
Theses
Mobile technologies with limited resources, such as smart phones or PDAs, have increased dramatically in popularity. However, the level of security provided for these technologies has not kept pace with the value of the data that they contain or transmit.
Wireless networks usually provide some security, in the form of encryption. GSM and GPRS use different forms of the A5 algorithm, and Wi-Fi uses WEP or WPA. These encryption algorithms have proven weaknesses and in some cases have been efficiently cracked. To improve the security of wireless networks, stronger encryption algorithms need to be developed. One of the most attractive …
Management Framework For Hybrid Wireless Networks, Chong Shen
Management Framework For Hybrid Wireless Networks, Chong Shen
Theses
The objective of the Hybrid Wireless Network with dedicated Relay Nodes (HWN*) architecture is to interface the Base Station (BS) Oriented Mobile Network (BSON) and the 802.fix based Mobile Ad hoc Wireless Network (MANET) so that one system can be utilised as an alternative radio access network for data transmissions, while the incorporation of Relay Nodes (RN) is to extend the communication coverage, optimise medium resource sharing, increase spatial reuse opportunity, stabilise MANET link and create more micro-cells. The HWN* keeps the existing cellular infrastructure and a Mobile Terminal (MT) can borrow radio resources from other cells via secure multi-hop …
A Distributed Ai Approach For Large-Scale Wlan Design, Alan Mcgibney
A Distributed Ai Approach For Large-Scale Wlan Design, Alan Mcgibney
Theses
The recent dramatic trend towards always-on-connectivity has driven the need for mobile ubiquitous computing environments with the advent of the Wireless Local Area Network (WLAN) seeing a shift from traditional wired networks to wireless networking. A WLAN typically contains a number of access points that allow wireless enabled clients access information and network resources such as the internet without the need for wires, offering flexibility and mobility to the users. Initial wireless networks were convenience based allowing users access to the primary wired network, and involved little planning prior to roll-out. The proliferation of low cost wireless devices combined wdth …
Treatment Of Aqueous Waste Streams At Eli Lilly - Alternatives To Incineration, Barry Hennessy
Treatment Of Aqueous Waste Streams At Eli Lilly - Alternatives To Incineration, Barry Hennessy
Theses
The aim of this project was to investigate the potential to treat liquid waste (secondary) from production processes at Eli Lilly with the emphasis on minimising the volume of waste sent for thermal oxidation. In addition, the project aimed to investigate if the chosen technology was diverse and potentially capable of handling waste streams from different processes. Membrane technology was identified as one of the most suitable technologies and trials were carried out on secondary waste from three production processes. The literature review and practical thrials aswell as assessment of trial results ran from October 2003 to June 2005.
All …
Mesh Mac Enabling Mesh Networking Over Ieee 802.15.4 Mac Layer, Panneer Selvan Muthukumaran
Mesh Mac Enabling Mesh Networking Over Ieee 802.15.4 Mac Layer, Panneer Selvan Muthukumaran
Theses
Wireless sensor network is a network of sensor nodes that function in a cooperative manner to monitor the changes in the physical environment. Wireless sensor networks are used in environment and habitat monitoring, healthcare applications, building automation, and traffic control to name a few. Typically, wireless sensor node is a low power embedded device which consists of a microcontroller, sensors, wireless transceiver and a battery. These devices are usually distributed in a physical environment which makes it difficult to maintain the network manually.
The IEEE 802.15.4 and Zigbee are considered as standard protocols for wireless sensor networks. The IEEE 802.15.4 …
Optimization In Multi-Agent Systems : Structures And Procedures, Ingo Stengel
Optimization In Multi-Agent Systems : Structures And Procedures, Ingo Stengel
Theses
The main advantage for the use of agent technology is in the capacity of agents to represent the interests of individual entities and to act autonomously on their behalf. In multi-agent systems this involves communication, coordination and negotiation.
The focus of this dissertation is to find ways to optimize multi-agent systems at different levels by taking into consideration their structure and the procedures used. As optimization depends to a large extent on the problem to be solved, group forming scenarios, in which self-interested agents compete to form and join groups, have been selected here for consideration. Optimization issues are discussed …