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Umeh, Njideka Adaku. "Security architecture methodology for large net-centric systems." Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.mst.edu/thesis/Umeh_09007dcc8049b3f0.pdf.
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Thesis (M.S.)--University of Missouri--Rolla, 2007.Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed December 6, 2007) Includes bibliographical references (p. 60-63).
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Palmer, Joseph McRae. "The Hybrid Architecture Parallel Fast Fourier Transform (HAPFFT) /." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd855.pdf.
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Schmid, Stefan. "A component-based active router architecture." Thesis, Lancaster University, 2003. http://eprints.lancs.ac.uk/12227/.
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Kerbyson, Darren James. "A multiple-SIMD architecture for image and tracking analysis." Thesis, University of Warwick, 1992. http://wrap.warwick.ac.uk/80185/.
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The computational requirements for real-time image based applications are such as to warrant the use of a parallel architecture. Commonly used parallel architectures conform to the classifications of Single Instruction Multiple Data (SIMD), or Multiple Instruction Multiple Data (MIMD). Each class of architecture has its advantages and dis-advantages. For example, SIMD architectures can be used on data-parallel problems, such as the processing of an image. Whereas MIMD architectures are more flexible and better suited to general purpose computing. Both types of processing are typically required for the analysis of the contents of an image. This thesis describes a novel massively parallel heterogeneous architecture, implemented as the Warwick Pyramid Machine. Both SIMD and MIMD processor types are combined within this architecture. Furthermore, the SIMD array is partitioned, into smaller SIMD sub-arrays, forming a Multiple-SIMD array. Thus, local data parallel, global data parallel, and control parallel processing are supported. After describing the present options available in the design of massively parallel machines and the nature of the image analysis problem, the architecture of the Warwick Pyramid Machine is described in some detail. The performance of this architecture is then analysed, both in terms of peak available computational power and in terms of representative applications in image analysis and numerical computation. Two tracking applications are also analysed to show the performance of this architecture. In addition, they illustrate the possible partitioning of applications between the SIMD and MIMD processor arrays. Load-balancing techniques are then described which have the potential to increase the utilisation of the Warwick Pyramid Machine at run-time. These include mapping techniques for image regions across the Multiple-SIMD arrays, and for the compression of sparse data. It is envisaged that these techniques may be found useful in other parallel systems.
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Ferng, Ming-Jehn 1958. "PERFORMANCE OF HIERARCHICALLY FLEXIBLE ADAPTIVE COMPUTER ARCHITECTURE APPLIED TO SORTING PROBLEMS." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/276457.
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In this thesis existing models of adaptive computer architecture were modified to adapt actual sorting problems to "divide 'n' conquer" (DQ) coordinator type configuration in which the children processors were expanded from three to four. Two hire/fire strategies, one using packets waiting in queue and the other using the average turn around time, were applied to maintain the hierarchical tree structure. More than 1200 simulation runs were analyzed and compared, finding that the first strategy was best at fast packet arrival rate and the second strategy was best at slow packets arrival rate. Comparing the hire/fire signal generation policies, the "fc-root" was best and the "root-fp" was worst. While comparing the effect of variable weighting factors in processors, using smaller weighting factor in either "partitioner" for the first strategy or "f-computer" for the second strategy may improve the system performance. (Abstract shortened with permission of author.)
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Johnson, James. "Quantitative analysis of plant root system architecture." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/55601/.
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The root system of a plant is responsible for supplying it with essential nutrients. The plant's ability to explore the surrounding soil is largely determined by its root system architecture (RSA), which varies with both genetic and environmental conditions. X-ray micro computed tomography (µCT) is a powerful tool allowing the non-invasive study of the root system architecture of plants grown in natural soil environments, providing both 3D descriptions of root architecture and the ability to make multiple measurements over a period of time. Once volumetric µCT data is acquired, the root system must first be segmented from the surrounding soil environment and then described. Automated and semi-automated software tools can be used to extract roots from µCT images, but current methods for the recovery of RSA traits from the resulting volumetric descriptions are somewhat limited. This thesis presents a novel tool (RooTh) which, given a segmented µCT image, skeletonises the root system and quantifies global and local root traits with minimal user interaction. The computationally inexpensive method used takes advantage of curve-fitting and active contours to find the optimal skeleton and thus evaluate root traits objectively. A small-scale experiment was conducted to validate and compare root traits extracted using the method presented here alongside other 2D imaging tools. The results show a good degree of correlation between the two methods.
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Vaudin, John. "A unified programming system for a multi-paradigm parallel architecture." Thesis, University of Warwick, 1991. http://wrap.warwick.ac.uk/108849/.
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Real time image understanding and image generation require very large amounts of computing power. A possible way to meet these requirements is to make use of the power available from parallel computing systems. However parallel machines exhibit performance which is highly dependent on the algorithms being executed. Both image understanding and image generation involve the use of a wide variety of algorithms. A parallel machine suited to some of these algorithms may be unsuited to others. This thesis describes a novel heterogeneous parallel architecture optimised for image based applications. It achieves its performance by combining two different forms of parallel architecture, namely fine grain SIMD and course grain MIMD, into a single architecture. In this way it is possible to match the most appropriate computing resource to each algorithm in a given application. As important as the architecture itself is a method for programming it. This thesis describes a novel multi-paradigm programming language based on C++, which allows programs which make use of both control and data parallelism to be expressed in a single coherent framework, based on object oriented programming. To demonstrate the utility of both the architecture and the programming system, two applications, one from the field of image understanding the other image generation are examined. These applications combine some novel algorithms with other novel implementation approaches to provide the most effective mapping onto this architecture.
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Moadeli, Mahmoud. "Quarc : an architecture for efficient on-chip communication." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/1991/.
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The exponential downscaling of the feature size has enforced a paradigm shift from computation-based design to communication-based design in system on chip development. Buses, the traditional communication architecture in systems on chip, are incapable of addressing the increasing bandwidth requirements of future large systems. Networks on chip have emerged as an interconnection architecture offering unique solutions to the technological and design issues related to communication in future systems on chip. The transition from buses as a shared medium to networks on chip as a segmented medium has given rise to new challenges in system on chip realm. By leveraging the shared nature of the communication medium, buses have been highly efficient in delivering multicast communication. The segmented nature of networks, however, inhibits the multicast messages to be delivered as efficiently by networks on chip. Relying on extensive research on multicast communication in parallel computers, several network on chip architectures have offered mechanisms to perform the operation, while conforming to resource constraints of the network on chip paradigm. Multicast communication in majority of these networks on chip is implemented by establishing a connection between source and all multicast destinations before the message transmission commences. Establishing the connections incurs an overhead and, therefore, is not desirable; in particular in latency sensitive services such as cache coherence. To address high performance multicast communication, this research presents Quarc, a novel network on chip architecture. The Quarc architecture targets an area-efficient, low power, high performance implementation. The thesis covers a detailed representation of the building blocks of the architecture, including topology, router and network interface. The cost and performance comparison of the Quarc architecture against other network on chip architectures reveals that the Quarc architecture is a highly efficient architecture. Moreover, the thesis introduces novel performance models of complex traffic patterns, including multicast and quality of service-aware communication.
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Rafaeli, Sandro. "Architecture and protocols for decentralised group key management." Thesis, Lancaster University, 2003. http://eprints.lancs.ac.uk/12293/.
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Namuye, Silvester. "An architecture for flexible multimedia group management services." Thesis, Lancaster University, 1996. http://eprints.lancs.ac.uk/42451/.
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Multimedia systems applications have become major research interests in both computing and telecommunications industries. In some literature, multimedia is defined as "mant media" where media is derived from medium, and a medium is a means of transporting information. It is generally accepted that multimedia does enhance communication for individuals and among interacting groups of humans. Applications such as video conferencing, distance learning, and medical imaging, gain advantage in the use of multimedia applications. However, while it is recognised that future systems should provide multimedia functionality, many issues are being raised about how best to support multimedia communication. This is because multimedia requires new communications infrastructures to enable integration of various media types as well as to manipulate and control the individual media. There is also the need to support the spatial and temporal requirements of continuous media, and to support group based applications. Thus the requirements of multimedia applications are diverse; this thesis focuses on multimedia group management services. A number of architectures have been advanced on the management strategies for multimedia communications. A review of these architectures shows that they have been either application specific, or too restrictive for group based applications. This thesis presents an architecture for connection management for distributed multimedia group applications. The architecture is intended to encourage a uniform appearance to all group applications to assist in their collective management, whilst being sufficiently flexible to cope with all likely multicast mechanisms upon which such applications may be based. The concept of a media channel is introduced as the application-independent appearance of an instance of a single applications such as a video-on-demand service, or a video conferencing application. A media channel is the basic unit of management in a group user-agent and therefore is used as a basis for the management of multiple applications. The main aspects of the media channel model considered in the thesis have been substantially implemented and the performance accessed as suitable for a reasonable number of multimedia applications.
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Askwith, Robert John. "An architecture for user privacy in mobile networks." Thesis, Liverpool John Moores University, 2000. http://researchonline.ljmu.ac.uk/4978/.
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Sawada, Jun. "Formal verification of an advanced pipelined machine /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
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Jäger, Nils. "Enacted embodiment in adaptive architecture : physiological interactions between inhabitants and biofeedback architecture." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/30854/.
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This thesis argues for an enactive embodied approach to understanding in- teractions with Adaptive Architecture. The growing interest in Ubiquitous and Pervasive Computing, including the current trends of wearable, sensor infused technology, shows the inevitable confluence of Human-Computer Interaction (HCI) and Architecture. Specifi- cally, the availability of real-time physiological data allows environments to respond directly to the bodily behaviours of their users. This creates an in- teraction cycle or loop, which temporarily couples architectural environ- ment and human body. One instantiation of such an interaction loop are so called biofeedback environments, which reflect an inhabitant's physiological behaviour back to the inhabitant. Very few such environments exist, little empirical research has been done regarding their effects on inhabitants, and none have specifically engaged with, appropriated, and discussed the concept of enacted embodiment in this context so far, especially regarding multi-occupancy. To investigate enacted embodied interactions with adaptive environments I use a three-tiered, mixed-method approach. In an in-depth, quantitative study of an existing prototype (ExoBuilding) I first investigated the enacted control-relationship between environment and an individual inhabitant. I found that, by manipulating the control relationship between the biofeed- back environment and its occupant, the environment can actively influence the physiological behaviour of its inhabitant, which in this case was respira- tion rate. The reasons why participants changed their behaviour after having lost practical control over the interaction were found to either be a pre- cognitive bodily interaction with the environment or to be an intentional synchronising with the changing environment in order to maintain cognitive control of the situation. Secondly, these findings and interpretations lead to a research-based design of a new multi-inhabitant prototype environment allowing enacted embod- ied interactions between the inhabitants themselves and between them and the environment called WABI. While expandable, WABI currently envelopes two sections, each of which accommodates one inhabitant. Through further co-development of the software platform originally used for ExoBuilding, WABI can distribute biofeedback spatially to both its building sections in multiple ways. Thirdly, I investigated the effects of three feedback distribution modes on the two inhabitants of WABI in a qualitative exploratory study, which found that physiological synchrony is highest when the environment distributes real- time feedback such that participants are surrounded by their partner's phys- iology. I propose a model of triadic enacted embodiment that conceptualises the observed interactions between inhabitants and between them and WABI. This work makes three key contributions to HCI and Architecture. First, it provides empirical data to the limited existing knowledge of the effects of adaptive environments on their inhabitants. Specifically, it increases our un- derstanding of the control relationship between inhabitant and adaptive en- vironment. And for the first time it provides an insight into interpersonal physiological synchrony between inhabitants of adaptive environments. Sec- ondly, this work adds a new class of adaptive environment that enables shared biofeedback between its inhabitants. And thirdly, the previous two contributions expand the existing concepts of embodiment, which so far have ignored the bodily relationship between inhabitants and adaptive envi- ronments.
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McKenzie, Neil R. "The Cranium network interface architecture : support for message passing on adaptive packet routing networks /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/6874.
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Garg, Vivek. "Mechanisms for hiding communication latency in data parallel architecture." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/15609.
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Shercliff, Gareth. "Quality assessment of service providers in a conformance-centric Service Oriented Architecture." Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/29514/.
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In a Service Oriented Architecture (SOA), the goal of consumers is to discover and use services which lead to them experiencing the highest quality, such that their expectations and needs are satisfied. In supporting this discovery, quality assessment tools are required to establish the degree to which these expectations will be met by specific services. Traditional approaches to quality assessment in SOA assume that providers and consumers of services will adopt a performance-centric view of quality, which assumes that consumers will be most satisfied when they receive the highest absolute performance. However, adopting this approach does not consider the subjective nature of quality and will not necessarily lead to consumers receiving services that meet their individual needs. By using existing approaches to quality assessment that assume a consumer's primary goal as being optimisation of performance, consumers in SOA are currently unable to effectively identify and engage with providers who deliver services that will best meet their needs. Developing approaches to assessment that adopt a more conformance-centric view of quality (where it is assumed that consumers are most satisfied when a service meets, but not necessarily exceeds, their individual expectations) is a challenge that must be addressed if consumers are to effectively adopt SOA as a means of accessing services. In addressing the above challenge, this thesis develops a conformance-centric model of an SOA in which conformance is taken to be the primary goal of consumers. This model is holistic, in that it considers consumers, providers and assessment services and their relationship; and novel in that it proposes a set of rational provider behaviours that would be adopted in using a conformance-centric view of quality. Adopting such conformance-centric behaviour leads to observable and predictable patterns in the performance of the services offered by providers, due to the relationship that exists between the level of service delivered by the service and the expectation of the consumer. In order to support consumers in the discovery of high quality services, quality assessment tools must be able to effectively assess past performance information about services, and use this as a prediction of future performance. In supporting consumers within a conformance-centric SOA, this thesis proposes and evaluates a new set of approaches to quality assessment which make use of the patterns in provider behaviour described above. The approaches developed are non-trivial – using a selection of adapted pattern classification and other statistical techniques to infer the behaviour of individual services at run-time and calculating a numerical measure of confidence for each result that can be used by consumers to combine assessment information with other evidence. The quality assessment approaches are evaluated within a software implementation of a conformance-centric SOA, whereby they are shown to lead to consumers experiencing higher quality than with existing performance-centric approaches. By introducing conformance-centric principles into existing real-world SOA, consumers will be able to evaluate and engage with providers that offer services that have been differentiated based on consumer expectation. The benefits of such capability over the current state-of-the-art in SOA are twofold. Firstly, individual consumers will receive higher quality services, and therefore will increase the likelihood of their needs being effectively satisfied. Secondly, the availability of assessment tools which acknowledge the conformance-centric nature of consumers will encourage providers to offer a range of services for consumers with varying expectation, rather than simply offering a single service that aims to delivery maximum performance. This recognition will allow providers to use their resources more efficiently, leading to reduced costs and increased profitability. Such benefits can only be realised by adopting a conformance-centric view of quality across the SOA and by providing assessment services that operate effectively in such environments. This thesis proposes, develops and evaluates models and approaches that enable the achievement of this goal.
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Soulahakis, Alexander. "An architecture for mobile communications in hazardous situations and physical disasters." Thesis, Liverpool John Moores University, 2007. http://researchonline.ljmu.ac.uk/5885/.
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Hazardous environmental conditions have always been a threat to human lives around the globe. Human society has seen some of the worst disasters due to accidents, physical phenomena or even cases that humans have created on purpose. The existing infrastructure can guarantee that there are hospitals, markets, mass transportation networks, sophisticated communications networks, and many more to cover all possible needs from a home user to an enterprise company. Unfortunately, the infrastructure has been proven unstable due to rapid environmental changes. The sophisticated networks, as well as the support buildings, can become useless in seconds in the event of a physical phenomenon such as an earthquake, a fire or a flood or even worse in the event of a well organized terrorist attack. The major problems identified are associated with inadequate capacity of the network, equipment vulnerable to physical phenomena and methodologies of disaster recovery that require time and work force to be applied. Modem telecommunication systems are designed in a cost effective way, to support as many users as they can, by using minimum equipment, but they cannot support users in hazardous environments. As a response to this situation we present the development of a novel architecture, which is based on an fast deployed network, infrastructure independent. The proposed network is capable of providing mobile subscribers with messaging and voice services in hazardous environments at the time of the event. Similar studies are based on infrastructure as they are in the need of extra hardware deployment. The novelty of our research is that we combine 802.11 and GSM in order to form a fast deployed network, infrastructure independent. The proposed architecture has two modes of operation: messages only or voice system. This solution benefits from the advantages of a deployed, infrastructure independent Ad Hoc network. This network is able to recover quickly from errors and can survive in hazardous dynamic environments. In addition we benefit from GSM technology using already implemented functions such as encoding/decoding for voice transmission. Combining those two technologies we can deploy a network which satisfies the challenges previously mentioned. While 802.11 handles connectivity and data transfers, GSM is responsible for bit error correction of voice calls and a number of other functions such as messaging and identification. The proposed architecture has been designed and simulated in order to evaluate the network. The evaluation has been separated in two phases. Messaging and voice capabilities of the network have been tested to investigate their performance. In the evaluation we check the factors affecting the network in a hazardous environment and we compare it to other approaches and similar networks. The results prove that the concept of messaging service is valid as the system can operate in hazardous environments. Voice capabilities of the system have been proven to work but further work is needed for maximising the performance and the reliability of the network. The new architecture can form the basis for the next generation emergency telecommunication services.
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Rabadi, Yousef. "Building a secured XML real-time interactive data exchange architecture." Thesis, University of Huddersfield, 2011. http://eprints.hud.ac.uk/id/eprint/17824/.
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Nowadays, TCP and UDP communication protocols are the most widely used transport methods for carrying out XML data messages between different services. XML data security is always a big concern especially when using internet cloud. Common XML encryption techniques encrypt part of private sections of the XML file as an entire block of text and apply these techniques directly on them. Man-in-the-Middle and Cryptanalysts can generate statistical information, tap, sniff, hack, inject and abuse XML data messages. The purpose of this study is to introduce architecture of new approach of exchanging XML data files between different Services in order to minimize the risk of any alteration, data loss, data abuse, data misuse of XML critical business data information during transmission by implementing a vertical partitioning on XML files. Another aim is to create a virtual environment within internet cloud prior to data transmission in order to utilise the communication method and rise up the transmission performance along with resources utilisation and spreads the partitioned XML file (shredded) through several paths within multi agents that form a multipath virtual network. Virtualisation in cloud network infrastructure to take advantage of its scalability, operational efficiency, and control of data flow are considered in this architecture. A customized UDP Protocol in addition to a pack of modules in RIDX adds a reliable (Lossless) and Multicast data transmission to all nodes in a virtual cloud network. A comparative study has been made to measure the performance of the Real-time Interactive Data Exchange system (RIDX) using RIDX UDP protocol against standard TCP protocol. Starting from 4 nodes up to 10 nodes in the domain, the results showed an enhanced performance using RIDX architecture over the standard TCP protocol
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Sun, Li. "Integrated visual perception architecture for robotic clothes perception and manipulation." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7685/.
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This thesis proposes a generic visual perception architecture for robotic clothes perception and manipulation. This proposed architecture is fully integrated with a stereo vision system and a dual-arm robot and is able to perform a number of autonomous laundering tasks. Clothes perception and manipulation is a novel research topic in robotics and has experienced rapid development in recent years. Compared to the task of perceiving and manipulating rigid objects, clothes perception and manipulation poses a greater challenge. This can be attributed to two reasons: firstly, deformable clothing requires precise (high-acuity) visual perception and dexterous manipulation; secondly, as clothing approximates a non-rigid 2-manifold in 3-space, that can adopt a quasi-infinite configuration space, the potential variability in the appearance of clothing items makes them difficult to understand, identify uniquely, and interact with by machine. From an applications perspective, and as part of EU CloPeMa project, the integrated visual perception architecture refines a pre-existing clothing manipulation pipeline by completing pre-wash clothes (category) sorting (using single-shot or interactive perception for garment categorisation and manipulation) and post-wash dual-arm flattening. To the best of the author’s knowledge, as investigated in this thesis, the autonomous clothing perception and manipulation solutions presented here were first proposed and reported by the author. All of the reported robot demonstrations in this work follow a perception-manipulation method- ology where visual and tactile feedback (in the form of surface wrinkledness captured by the high accuracy depth sensor i.e. CloPeMa stereo head or the predictive confidence modelled by Gaussian Processing) serve as the halting criteria in the flattening and sorting tasks, respectively. From scientific perspective, the proposed visual perception architecture addresses the above challenges by parsing and grouping 3D clothing configurations hierarchically from low-level curvatures, through mid-level surface shape representations (providing topological descriptions and 3D texture representations), to high-level semantic structures and statistical descriptions. A range of visual features such as Shape Index, Surface Topologies Analysis and Local Binary Patterns have been adapted within this work to parse clothing surfaces and textures and several novel features have been devised, including B-Spline Patches with Locality-Constrained Linear coding, and Topology Spatial Distance to describe and quantify generic landmarks (wrinkles and folds). The essence of this proposed architecture comprises 3D generic surface parsing and interpretation, which is critical to underpinning a number of laundering tasks and has the potential to be extended to other rigid and non-rigid object perception and manipulation tasks. The experimental results presented in this thesis demonstrate that: firstly, the proposed grasp- ing approach achieves on-average 84.7% accuracy; secondly, the proposed flattening approach is able to flatten towels, t-shirts and pants (shorts) within 9 iterations on-average; thirdly, the proposed clothes recognition pipeline can recognise clothes categories from highly wrinkled configurations and advances the state-of-the-art by 36% in terms of classification accuracy, achieving an 83.2% true-positive classification rate when discriminating between five categories of clothes; finally the Gaussian Process based interactive perception approach exhibits a substantial improvement over single-shot perception. Accordingly, this thesis has advanced the state-of-the-art of robot clothes perception and manipulation.
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Lyons, Nohl Gregory 1967. "The viability of pen-based computers in landscape architecture." Thesis, The University of Arizona, 1993. http://hdl.handle.net/10150/291595.
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Over the years landscape architecture has sluggishly pursued the adaptation of computers as design tools. However, computerized conceptual design tools have fallen far behind Computer Aided Drafting and other design tools in availability and productivity. This has been attributed to the computer's failure to support the creative methods of landscape architects. Three surveys were conducted to examine this perceived problem. These surveys, focusing on computer usage, design methodology, and the adaptation of pen-based computers, will be a basis for future research in landscape architecture. These surveys found that pen-based computers may eventually be useful tools in landscape architecture, but only if computer technology continues to advance and if extensive research is conducted to explore their viability and practicality.
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Baird, Ian Jacob. "A light-weight middleware framework for fault-tolerant and secure distributed applications." Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.mst.edu/thesis/pdf/baird_pdf_09007dcc804e84aa.pdf.
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Thesis (M.S.)--University of Missouri--Rolla, 2007.Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed April 22, 2008) Includes bibliographical references (p. 70-71).
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José, Rui João Peixoto. "An open architecture for location-based services in heterogeneous mobile environments." Thesis, Lancaster University, 2001. http://eprints.lancs.ac.uk/11946/.
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Lee, Jinho. "Architecture for a low-level functional specification language supporting multimodeling and simulation." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011609.
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Piechocinski, Marek. "Electrochemical sensor system architecture using the CMOS-MEMS technology for cytometry applications." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3694/.
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This thesis presents the development process of an integrated sensor-system-on-chip for recording the parameters of blood cells. The CMOS based device consists of the two flow-through sensor arrays, stacked one on top of the other. The sensors are able to detect the biological cell in terms of its physical size and the surface charge on a cell’s membrane. The development of the measurement system was divided into several stages these were to design and implement the two sensor arrays complemented with readout circuitry onto a single CMOS chip to create an on-chip membrane with embedded flow-through micro-channels by a CMOS compatible post-processing techniques to encapsulate and hermeti-cally package the device for liquid chemistry experiments, to test and characterise the two sensor arrays together with readout electronics, to develop control and data acquisition software and to detect the biological cells using the complete measurement system. Cy-tometry and haematology fields are closely related to the presented work, hence it is envis-aged that the developed technology enables further integration and miniaturisation of the biomedical instrumentation. The two vertically stacked 4 x 4 flow-through sensor arrays, embedded into an on-chip membrane, were implemented in a single silicon chip device together with a readout circuitry for each of the sensor sets. To develop a CMOS-MEMS device the design and fabrication was carried out using a commercial process design kit (0.35 µm 4-Metal, 2-Poly, CMOS) as well as the foundry service. Thereafter the device was post-processed in-house to develop the on-chip membrane and open the sensing micro-apertures. The two types of sensor were integrated on the silicon dice for multi-parametric characterisation of the analyte. To read the cell membrane charge the ion sensitive field effect transistor (ISFET) was utilised and for cell size (volume) detection an impedance sensor (Coulter counter) was used. Both sensors rely on a flow-through mode of operation, hence the constant flow of the analyte sample could be maintained. The Coulter counter metal electrode was exposed to the solution, while the ISFET floating gate electrode maintained contact with the analyte through a charge sensitive membrane constructed of a dielectric material (silicon dioxide) lining the inside of the micro-pore. The outside size of each of the electrodes was 100 µm x 100 µm and the inside varied from 20 µm x 20 µm to 58 µm x 58 µm. The sense aperture size also varied from 10 µm x 10 µm to 16 µm x 16 µm. The two stacked micro-electrode arrays were layed out on an area of 5002 µm2. The CMOS-MEMS device was fit into a custom printed circuit board (PCB) chip carrier, thereafter insulated and hermetically packaged. Microfluidic ports were attached to the packaged module so that the analyte can be introduced and drained by a flow-through mode of operation. The complete microfluidic system and packaging was assembled and thereafter evaluated for correct operation. Undisturbed flow of the analyte solution is es-sential for the sensor operation. This is related to the fact that the electrochemical response of both sensors depends on the analyte flow through the sense micro-apertures thus any aggregation of the sample within the microfluidic system would cause clogging of the mi-cro-pores. The on-chip electronic circuitry was characterised, and after comparison with the simulated results found to be within an error margin of what enables it for reliable sensor signal readout. The measurement system is automated by software control so that the bias parame-ters can be set precisely, it also helped while error debugging. Analogue signals from the two sensor arrays were acquired, later processed and stored by a data acquisition system. Both control and data capture systems are implemented in a high level programming lan-guage. Furthermore both are integrated and operated in a one window based graphical user interface (GUI). A fully functional measurement system was used as a flow-through cytometer for living cells detection. The measurements results showed that the system is capable of single cell detection and on-the-fly data display.
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Moustakas, Evangelos. "Design and simulation of a primitive RISC architecture using VHDL /." Online version of thesis, 1991. http://hdl.handle.net/1850/11229.
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Ligon, Walter Batchelor III. "An empirical evaluation of architectural reconfigurability." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/8204.
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Lee, Joonwon. "Architectural features for Scalable shared memory multiprocessors." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/8200.
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Meccawy, Maram. "A service-orientated architecture for adaptive and collaborative e-learning systems." Thesis, University of Nottingham, 2009. http://eprints.nottingham.ac.uk/10684/.
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This research proposes a new architecture for Adaptive Educational Hypermedia Systems (AEHS). Architectures in the context of this thesis refer to the components of the system and their communications and interactions. The architecture addresses the limitations of AEHS regarding interoperability, reusability, openness, flexibility, and limited tools for collaborative and social learning. It presents an integrated adaptive and collaborative Web-based learning environment. The new e-learning environment is implemented as a set of independent Web services within a service-oriented architecture (SOA). Moreover, it uses a modern Learning Management System (LMS) as the delivery service and the user interface for this environment. This is a two-way solution, whereby adaptive learning is introduced via a widely adopted LMS, and the LMS itself is enriched with an external - yet integrated - adaptation layer. To test the relevance of the new architecture, practical experiments were undertaken. The interoperability, reusability and openness test revealed that the user could easily switch between various LMS to access the personalised lessons. In addition, the system was tested by students at the University of Nottingham as a revision guide to a Software Engineering module. This test showed that the system was robust; it automatically handled a large number of students and produced the desired adaptive content. However, regarding the use of the collaborative learning tools, the test showed low levels of such usage.
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Zengin, Salih. "Systemc Implementation Of A Risc-based Microcontroller Architecture." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12608083/index.pdf.
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Increasing the complexity of modern electronic systems leads to Electronic System Level (ESL) modeling concept, which supports hardware and software co-design and co-verification environment in a single framework. SystemC language, which is an IEEE approved electronic design standard for system design and verification processes, provides such an environment by supporting a wide range of abstraction levels from system-level to register-transfer level (RTL). In this thesis, two different models of a processor core, whose instruction set architecture (ISA) is compatible with 16-bit TI MSP430 microcontroller, are designed by employing the classical hardware modeling capability of the SystemC language. With its well-designed orthogonal instruction set, elegant addressing modes, useful constant generators and flexible von-Neumann architecture, 16-bit RISC-like processor of the MSP430 microcontroller is an ideal selection for the system-on-a-chip (SoC) designs. Instruction set and addressing modes of the designed processors are simulated thoroughly. In addition, original 16-bit and 32-bit cyclic redundancy code (CRC) programs are used in order to verify the processor cores. In this study, SystemC to hardware flow is also illustrated by synthesizing the Arithmetic and Logic Unit (ALU) part of the processor into a Xilinx-based hardware.
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Costa, Fabio Moreira. "Combining meta information management and reflection in an architecture for configurable and reconfigurable middleware." Thesis, Lancaster University, 2001. http://eprints.lancs.ac.uk/11947/.
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Sivasubramaniam, Anand. "A framework for evaluating architectural issues of parallel systems." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/9194.
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Gordon, Elizabeth Sara. "GRUE : an architecture for agents in games and other real-time environments." Thesis, University of Nottingham, 2005. http://eprints.nottingham.ac.uk/28736/.
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This thesis presents an architecture, which we call GRUE, for intelligent agents in real-time dynamic worlds. Such environments require agents to be able to flexibly adjust their behaviour to take into account changes in the environment or other agents’ actions. Our architecture is based on work done in robotics (Nilsson, 1994; Benson and Nilsson, 1995; Benson, 1996), which also deals with complex, dynamic environments. Our work focuses on goal arbitration, the method used by the agent to choose an appropriate goal for the current situation, and to re-evaluate when the situation changes. In the process, we have also developed a method for representing items in the environment, which we call resources, in terms of their properties. This allows the agent to specify a needed object in terms of required properties and use available objects with appropriate properties interchangeably. We show that the GRUE architecture can be used successfully in both a typical AI test bed and a commercial game environment. In addition, we have undertaken to experimentally test the effects of the features included in our architecture by comparing agents using the standard GRUE architecture to agents with one or more features removed and find that these features do improve the performance of the agent where expected.
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Keir, Paul. "Design and implementation of an array language for computational science on a heterogeneous multicore architecture." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3645/.
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The packing of multiple processor cores onto a single chip has become a mainstream solution to fundamental physical issues relating to the microscopic scales employed in the manufacture of semiconductor components. Multicore architectures provide lower clock speeds per core, while aggregate floating-point capability continues to increase. Heterogeneous multicore chips, such as the Cell Broadband Engine (CBE) and modern graphics chips, also address the related issue of an increasing mismatch between high processor speeds, and huge latency to main memory. Such chips tackle this memory wall by the provision of addressable caches; increased bandwidth to main memory; and fast thread context switching. An associated cost is often reduced functionality of the individual accelerator cores; and the increased complexity involved in their programming. This dissertation investigates the application of a programming language supporting the first-class use of arrays; and capable of automatically parallelising array expressions; to the heterogeneous multicore domain of the CBE, as found in the Sony PlayStation 3 (PS3). The language is a pre-existing and well-documented proper subset of Fortran, known as the ‘F’ programming language. A bespoke compiler, referred to as E , is developed to support this aim, and written in the Haskell programming language. The output of the compiler is in an extended C++ dialect known as Offload C++, which targets the PS3. A significant feature of this language is its use of multiple, statically typed, address spaces. By focusing on generic, polymorphic interfaces for both the generated and hand constructed code, a number of interesting design patterns relating to the memory locality are introduced. A suite of medium-sized (100-700 lines), real-world benchmark programs are used to evaluate the performance, correctness, and scalability of the compiler technology. Absolute speedup values, well in excess of one, are observed for all of the programs. The work ultimately demonstrates that an array language can significantly reduce the effort expended to utilise a parallel heterogeneous multicore architecture, while retaining high performance. A substantial, related advantage in using standard ‘F’ is that any Fortran compiler can create debuggable, and competitively performing serial programs.
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Meng, Zhaozong. "Investigation of a hierarchical context-aware architecture for rule-based customisation of mobile computing service." Thesis, University of Huddersfield, 2014. http://eprints.hud.ac.uk/id/eprint/23419/.
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The continuous technical progress in mobile device built-in modules and embedded sensing techniques creates opportunities for context-aware mobile applications. The context-aware computing paradigm exploits the relevant context as implicit input to characterise the user and physical environment and provide a computing service customised to the contextual situation. However, heterogeneity in techniques, complexity of contextual situation, and gap between raw sensor data and usable context keep the techniques from truly integration for extensive use. Studies in this area mainly focus on feasibility demonstration of the emerging techniques, and they lack general architecture support and appropriate service customisation strategy. This investigation aims to provide general system architecture and technical approaches to deal with the heterogeneity problem and efficiently utilise the dynamic context towards proactive computing service that is customised to the contextual situation. The main efforts of this investigation are the approaches to gathering, handling, and utilising the dynamic context information in an efficient way and the decision making and optimisation methods for computing service customisation. In brief, the highlights of this thesis cover the following aspects: (1) a hierarchical context-aware computing architecture supporting interoperable distribution and further use of context; (2) an in-depth analysis and classification of context and the corresponding context acquisition methods; (3) context modelling and context data representation for efficient and interoperable use of context; (4) a rule-based service customisation strategy with a rule generation mechanism to supervise the service customisation. In addition, feasibility demonstration of the proposed system and contribution justification of this investigation are conducted through case studies and prototype implementations. One case study uses mobile built-in sensing techniques to improve the usability and efficiency of mobile applications constrained by resource limitation, and the other employs the mobile terminal and embedded sensing techniques to predict users’ expectations for home facility automatic control. Results demonstrate the feasibility of the proposed context handling architecture and service customisation methods. It shows great potential for employing the context of the computing environment for context-aware adaptation in pervasive and mobile applications but also indicates some underlying problems for further study.
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Akturan, Cagdas. "Performance enhancing software loop transformations for embedded VLIW/EPIC processors." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3035929.
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Ho, Phuong Minh. "Parallel architectures for solving combinatorial problems of logic design." PDXScholar, 1989. https://pdxscholar.library.pdx.edu/open_access_etds/3872.
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This thesis presents a new, practical approach to solve various NP-hard combinatorial problems of logic synthesis, logic programming, graph theory and related areas. A problem to be solved is polynomially time reduced to one of several generic combinatorial problems which can be expressed in the form of the Generalized Propositional Formula (GPF) : a Boolean product of clauses, where each clause is a sum of products of negated or non-negated literals.
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Bari, Himanshu. "Design and implementation of a library to support the Common Component Architecture (CCA) over Legion." Diss., Online access via UMI:, 2004. http://wwwlib.umi.com/dissertations/fullcit/1424173.
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Ganapati, Nalini. "CoMet : a synthetic benchmark for message-passing architectures /." Full text open access at:, 1993. http://content.ohsu.edu/u?/etd,636.
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Narravula, Harsha V. Katsinis Constantine. "Performance of parallel algorithms on a broadcast-based architecture /." Philadelphia, Pa. : Drexel University, 2003. http://dspace.library.drexel.edu/handle/1860/254.
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Ciftcibasi, Mehmet Emre. "New Montgomery Modular Multiplier Architecture." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12606965/index.pdf.
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This thesis is the real time implementation of the new, unified field, dual&ndashradix Montgomery modular multiplier architecture presented by SavaS et al, for performance comparison with standard Montgomery multiplication algorithms. The unified field architecture operates in both GF(p) and GF(2n). The dual radix capability enables processing of two bits of the multiplier in every clock cycle in GF(2n) mode, while one bit of the multiplier is processed in GF(p) mode. The new architecture is implemented in a Xilinx FPGA on the custom printed circuit board. The windows user interface is developed in Borland Builder environment and the ethernet interface is implemented by Ubicom IP2022 controller. The algorithms are compared from operating clock frequency, silicon area cost and multiplication time perspectives. The new architecture multiplies two times faster in GF(p) and four times faster in GF(2n), compared to the previous architectures as expected. The operand length is increased from 8 bits to 1024 bits, with the compromise of decreasing the operating clock frequency from 150 Mhz down to 15 Mhz.
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Smith, Kevin Scott. "PAT : an interactive fortran parallelizing assistant tool." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/9193.
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Austin, Todd Michael. "Exploiting implicit parallelism in SPARC instruction execution /." Online version of thesis, 1990. http://hdl.handle.net/1850/11007.
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Tullsen, Dean Michael. "Simultaneous multithreading /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/6921.
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Tatapudi, Suryanarayana Bhimeshwara. "A high performance low power mesochronous pipeline architecture for computer systems." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Dissertations/Spring2006/s%5Ftatapudi%5F042706.pdf.
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Cuvillo, Juan del. "Breaking away from the OS shadow a program execution model aware thread virtual machine for multicore architectures /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 120 p, 2008. http://proquest.umi.com/pqdweb?did=1601517941&sid=4&Fmt=2&clientId=8331&RQT=309&VName=PQD.
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Staite, Christopher. "Identity management architecture and implementation : evaluation and improvement." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3388/.
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The definition of identity varies, and on the Internet it can be difficult to keep track of. Rather than trying to discuss the philosophical question of "who am I?", I like to define your digital identity as the information you place on the Internet (actively or passively). Managing this identity comes down to what information you give out and how to protect and modify that information. This thesis focuses on the latter half, the protection and modification of online identities and only skims the realms of protecting the information given to third parties. A distinct lack of drive in the development of technologies for managing authentication has dogged the Internet for some time. Numerous efforts have been made to simplify administration, but open protocols meant for simplifying the user experience have had little promotion and ended up forgotten or used to simplify administration. The question that needs to be answered, as usual in research, is why? Studies have shown that password fatigue is a very real issue and identity theft is increasing. Companies will always optimise their time and resources, but academics need to focus their work on optimising the user experience. In this thesis, a study of existing work produces a methodology to evaluate previous developments. This aids in determining where progress has been made in previous iterations and how, leading to a new development in identity management focussed on the needs of the end user. Finally, two implementations are created to realise this new form of identity management.
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Niu, Yanwei. "Parallelization and performance optimization of bioinformatics and biomedical applications targeted to advanced computer architectures." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 1.05 Mb., 143 p, 2005. http://wwwlib.umi.com/dissertations/fullcit/3181852.
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Wing, Peter D. "Enhancements to the XNS authentication-by-proxy model /." Online version of thesis, 1990. http://hdl.handle.net/1850/10613.
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Samson, Rodelyn Reyes. "A multi-agent architecture for internet distributed computing system." CSUSB ScholarWorks, 2003. https://scholarworks.lib.csusb.edu/etd-project/2408.
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This thesis presents the developed taxonomy of the agent-based distributed computing systems. Based on this taxonomy, a design, implementation, analysis and distribution protocol of a multi-agent architecture for internet-based distributed computing system was developed. A prototype of the designed architecture was implemented on Spider III using the IBM Aglets software development kit (ASDK 2.0) and the language Java.
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Clarke, Thomas James Woodchurch. "General theory relating to the implementation of concurrent symbolic computation." Thesis, Cambridge [Cambridgeshire] : University of Cambridge, Computer Laboratory, 1989. http://catalog.hathitrust.org/api/volumes/oclc/20796926.html.
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