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Enhancing it investments productivity: Integrating network QoS and it indirect costs

Enhancing it investments productivity: Integrating network Q...

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3rd European and Mediterranean Conference on Information Systems, EMCIS 2006

作者： Ghoneim, Ahmad El-Haddadeh, Ramzi School of Information Systems Computing and Mathematics Brunel University United Kingdom School of Engineering and Design Brunel University United Kingdom

ISBN: (纸本)1902316460

Increasing productivity is considered one of the major driving factors for a successful business. From an Information Technology (IT) infrastructure perspective, obtaining an optimised performance of resources is expected to improve productivity. From a technical viewpoint, the introduction of Quality of Service (QoS) models have been perceived to optimise the performance of the organisation network backbone. These models aim to provide an acceptable level of service assurance to the newly introduced applications and services such as voice and video. From a management viewpoint, the proper management of IT investments indirect costs can lead to a reduction of the overall cost portfolio. Consequently, both benefits and productivity increase are likely to be realised. This paper introduces network QoS strategy within the hierarchy of business infrastructure. In addition, it aims to identify the relationship between network QoS and IT indirect costs. Such integration demonstrates how network QoS strategy can be used to control IT indirect costs as well as enhancing network performance.

关键词： Productivity

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Kalman filter with linear predictor and harmonic noise models for noisy speech enhancement

Kalman filter with linear predictor and harmonic noise model...

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14th European Signal Processing Conference, EUSIPCO 2006

作者： Yan, Qin Vaseghi, Saeed Zavarehei, Esfandiar Milner, Ben School of Engineering and Design Brunel University London United Kingdom School of Computing Sciences University of East Anglia Norwich United Kingdom

This paper presents a method for noisy speech enhancement based on integration of a formant-tracking linear prediction (FTLP) model of spectral envelope and a harmonic noise model (HNM) of the excitation of speech. The time-varying trajectories of the parameters of the LP and HNM models are tracked with Viterbi classifiers and smoothed with Kalman filters. A frequency domain pitch estimation is proposed, that searches for the peak SNRs at the harmonics. The LP-HNM model is used to deconstruct noisy speech, de-noise its LP and HNM models and then reconstitute cleaned speech. Experimental evaluations show the performance gains resulting from the formant tracking, harmonic extraction and noise reduction stages.

关键词： Speech enhancement

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A novel approach to thermochromic liquid crystal calibration using neural networks

A novel approach to thermochromic liquid crystal calibration...

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作者： Grewal, G.S. Bharara, M. Cobb, J.E. Dubey, V.N. Claremont, D.J. Academic Biomedical Engineering Research Group School of Design Engineering and Computing Bournemouth University BH12 5BB United Kingdom

Liquid crystal thermography (LCT) is a common surface temperature measurement technique. Typically, the colour response is calibrated against temperature by building an analytical relation between the temperature and the hue of the colour. A suitable polynomial fit is then used to describe this relation after removing the discontinuity in the hue. The variability of hue at each calibration point determines the temperature resolution. However, this technique does not take into consideration the variability in R, G and B intensities used to determine the hue, leading to uncertainty in the measured temperature. This paper describes a novel technique using neural networks to calibrate thermochromic liquid crystal (TLC) material and compensate for high variability in RGB intensities along with other sources of noise in the data. A TLC-based temperature measurement system and calibration results are presented. In our measurements, the lighting intensity (8-bit mean intensity of black surface standard deviation) is changed from a minimum of 16.65 2.30 to a maximum of 31.41 3.85. The neural networks were trained on the steady-state TLC calibration system. The results indicate that the neural networks can cope with the variation in lighting by merging the shifted hue curves into a single curve determined by the regression analysis of the test data. Performance characteristics studied on various network configurations relevant to the analysis are described. This approach may be useful in developing liquid crystal thermography for various biomedical applications. © 2006 IOP Publishing Ltd.

关键词： Liquid crystals

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Creating a best fit between business strategy and web services capabilities using problem frames modeling approach

Creating a best fit between business strategy and web servic...

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12th International Working Conference on Requirements engineering: Foundation for Software Quality, REFSQ 2006, In Conjunction with CAiSE 2006

作者： Jha, Anju Cox, Karl Phalp, Keith T. School of Computer Science and Engineering University of New South Wales Australia Empirical Software Engineering National ICT Australia Sydney Australia School of Design Engineering and Computing Bournemouth University United Kingdom

ISBN: (纸本)3922602266

This paper proposes a strategy-oriented requirements engineering methodology that creates a best fit between the business strategy and the Web services capabilities that the organization provides to the outside world. The methodology presented in the paper builds upon eBMO, e-Business modeling ontology by Pigneur and Osterwalder by applying Jackson's Progression of Problems. We apply Jackson's Progression of Problem in a unique way to describe business perspective on Web service value. We use problem domain modeling approach to describe Web services capabilities. Our approach is illustrated via an example of Amazon Web services. We found it possible to create a best fit between the strategic objectives to implementation.

关键词： Web services

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Revisit of fading channel characteristics in IEEE 802.11 WLANs: Independent and burst transmission errors

Revisit of fading channel characteristics in IEEE 802.11 WLA...

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2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

作者： Chatzimisios, P. Vitsas, V. Boucouvalas, A.C. Department of Informatics Technological Educational Institution Thessaloniki Greece Multimedia Communications Research Group School of Design Engineering and Computing Bournemouth University Fern Barrow Poole United Kingdom

ISBN: (纸本)1424403294

IEEE 802.11 is worldwide implemented being the most widely deployed protocol for Wireless Local Area Networks (WLANs). In a realistic environment, WLANs encounter channel fading which causes independent and burst transmission errors which in addition with packet collisions degrade overall performance. In this paper, we present a simple and effective contention window-resetting scheme, named Double Increment Double Decrement (DIDD), to improve the performance of the Binary Exponential Backoff (BEB) scheme utilized in IEEE 802.11. Our work becomes important and meaningful since it analyzes and models the error patterns in order to evaluate their potential impact on throughput efficiency and average packet delay performance. In particular, we provide useful insights by exploring the effect of independent and burst transmission errors, packet size and network size on the performance of the DIDD scheme. © 2006 IEEE.

关键词： Fading channels

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Knowledge-Based Intelligent Information and engineering Systems 1

引用

丛书名： Lecture Notes in Computer Science

2006年

作者： Bogdan Gabrys Robert J. Howlett Lakhmi C. Jain

ISBN: (数字)9783540465362

ISBN: (纸本)9783540465355

Delegates and friends, we are very pleased to extend to you the sincerest of welcomes to this, the 10th International Conference on Knowledge Based and Intelligent Information and engineering Systems at the Bournemouth International Centre in Bournemouth, UK, brought to you by KES International. This is a special KES conference, as it is the 10th in the series, and as such, it represents an occasion for celebration and an opportunity for reflection. The first KES conference was held in 1997 and was organised by the KES conference founder, Lakhmi Jain. In 1997, 1998 and 1999 the KES conferences were held in Adelaide, Australia. In 2000 the conference moved out of Australia to be held in Brighton, UK; in 2001 it was in Osaka, Japan; in 2002, Crema near Milan, Italy; in 2003, Oxford, UK; in 2004, Wellington, New Zealand; and in 2005, Melbourne, Australia. The next two conferences are planned to be in Italy and Croatia. Delegate numbers have grown from about 100 in 1997, to a regular figure in excess of 500. The conference attracts delegates from many different countries, in Europe, Australasia, the Pacific Rim, Asia and the Americas, and may truly be said to be ‘International’. Formed in 2001, KES International has developed into a worldwide organisation that provides a professional community for researchers in the discipline of knowledge-based and intelligent engineering and information systems, and through this, opportunities for publication, networking and interaction.

关键词： Artificial Intelligence Computer and Information Systems Applications Information Storage and Retrieval Computer Application in Administrative Data Processing Computers and Society IT Operations

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Knowledge-Based Intelligent Information and engineering Systems 1

引用

丛书名： Lecture Notes in Computer Science

2006年

作者： Bogdan Gabrys Robert J. Howlett Lakhmi C. Jain

ISBN: (数字)9783540465447

ISBN: (纸本)9783540465423

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Distributed Video Coding of Pixel Interleaved Wyner-Ziv Frames

Distributed Video Coding of Pixel Interleaved Wyner-Ziv Fram...

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International Conference on Industrial and Information Systems, ICIIS

作者： W.A.R.J. Weerakkody W.A.C. Fernando A.B.B. Adikari Electronics and Computing Engineering School of Engineering and Design Brunei University Uxbridge Middlesex UK

The research on distributed video coding (DVC) has been increasingly popular in recent times due to its promising features. Primarily it modifies the complexity balance between the encoder and decoder in the traditional video coding architecture. In this paper, we present a novel architecture for the DVC codec involving a pixel interleaver/de-interleaver stage. This modification enables the exploitation of the unequal distribution of motion levels on the frame to improve the perceptual video quality at the receiver. This modified codec architecture does not involve a reverse channel and hence is suitable for applications with unidirectional channels and also for video storage based applications. The simulation results show a PSNR gain of up to 12 dB compared to a DVC codec not involving pixel interleaver function

关键词： Video coding Decoding Codecs Remote monitoring design engineering PSNR Cameras Costs Statistics Streaming media

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Low Complex Key Frame Encoding with High Quality Wyner-Ziv Coding

Low Complex Key Frame Encoding with High Quality Wyner-Ziv C...

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International Conference on Industrial and Information Systems, ICIIS

作者： A.B.B. Adikari W.A.C. Fernando H.K. Arachchi W.A.R.J. Weerakkody Electronics and Computing Engineering School of Engineering and Design Brunei University Uxbridge Middlesex UK

In this paper, we propose a novel concept for key frame encoding in distributed video codecs (DVC) without using any additional coding scheme. The proposed concept is an extension of Wyner-Ziv coding for key frame coding. Since key frames are used in the prediction purposes, the quality of them is critical in the DVC codecs. Therefore we use a fine quantizer (high quality) to encode these key frames. Side information is generated as in the conventional DVC codecs for Wyner-Ziv frames and the decoder requests parity information from the encoder based on this side information until it decodes the complete frame with a predetermined picture quality. Simulation results show that, up to 8 dB PSNR gain can be obtained with the proposed algorithm over H.264 intra frame encoding at the same bit rate

关键词： Encoding Decoding Costs Videoconference Distributed computing design engineering Codecs Monitoring Video coding Streaming media

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Knowledge-Based Intelligent Information and engineering Systems 1

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丛书名： Lecture Notes in Computer Science

2006年

作者： Bogdan Gabrys Robert J. Howlett Lakhmi C. Jain

ISBN: (数字)9783540465393

ISBN: (纸本)9783540465379

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