........................................................................................................................ ii Acknowledgements ...................................................................................................... iv Publications ................................................................................................................... v Table of

Personal Learning Environments have emerged as a complementary, even challenging, paradigm to Adaptive Learning Systems. We consider the mash-up era as an appropriate approach for a successful realization of digital personal learning environments. However, mash-ups are also accompanied by critical technical and usability challenges. In this paper, we try to identify some of these challenges and...

Purpose: The main purpose of this paper is to illustrate examples of the current maturity of universities both in the UK and abroad when implementing a continuous improvement programme or change agenda using techniques such as Lean Six Sigma. Design/Methodology/Approach: 21 UK universities and 17 International Universities have been identified and targeted with a questionnaire to research their...

Lower Mekong Basin (LMB) experiences a recurrent drought phenomenon. However, few studies have focused on drought monitoring in this region due to lack of ground observations. The newly released Climate Hazards Group Infrared Precipitation with Station data (CHIRPS) with a long-term record and high resolution has a great potential for drought monitoring. Based on the assessment of CHIRPS for ca...

Sigma-delta quantization is a way of representing bandlimited signals (functions with compactly supported Fourier transforms) by {0, 1} sequences for each sampling density such that convolving these sequences with appropriately chosen filters produces approximations of the original signals. Approximations are refined by increasing the sampling density; this is what makes such a scheme fundament...

Proton-nucleus collisions, where the beam proton gets excited to the delta resonance and then decays to pπ + , either inside or outside the nuclear medium, are studied. Cross-sections for various kinematics for the (p,p ′ π +) reaction between 500 MeV and 1 GeV beam energy are calculated to see the effects of the nuclear medium on the propagation and decay of the resonance. The cross-sections s...

This paper describes the design of a Sigma-Delta modulator aimed for A/D conversion in xDSL applications, featuring 14-bit@4Msample/s in a 0.35μm mainstream digital CMOS technology. Architecture selection, modulator sizing and cell sizing tasks where supported by a CAD methodology, thus allowing us to obtain a power efficient implementation in a short design cycle.

A methodology for the design of Continuous-Time (CT) Sigma-Delta (Σ∆) modulators with VCO-based quantizer is proposed. The coefficients of the CT Σ∆ modulator are accurately calculated such that the noise transfer function of the modulator is exactly the same as a Discrete-Time (DT) Σ∆ modulator of the same order. Several design examples for different modulator orders and feedback DAC signal sh...