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184 results

A 10:1 Bandwidth Cryogenic Quadruple-Ridged Flared Horn Design for Reflector Antennas in Radio Astronomy

Journal Article
Ma, Y., See, C. H., Pang, F., Wu, D., Liu, D., Abidin, Z. Z., …Abd-Alhameed, R. A. (2020)
A 10:1 Bandwidth Cryogenic Quadruple-Ridged Flared Horn Design for Reflector Antennas in Radio Astronomy. IEEE Access, https://doi.org/10.1109/ACCESS.2020.2991350
A two port 2.4 to 24 GHz cryogenic Quadruple-Ridged Flared Horn (QRFH) Feed with 10:1 impedance bandwidth is selected for presentation and investigation in this paper. The an...

Modelling IoT devices communication employing representative operation modes to reveal traffic generation characteristics

Journal Article
Barakat, B., Keates, S., Wassel, I. J., & Arshad, K. (2019)
Modelling IoT devices communication employing representative operation modes to reveal traffic generation characteristics. International Journal of Parallel, Emergent and Distributed Systems, https://doi.org/10.1080/17445760.2019.1649402
Several traffic models for the Internet of Things (IoT) have been proposed in the literature. However, they can be considered as heuristic models since they only reflect the s...

Universal Access: The Challenges Ahead

Conference Proceeding
Keates, S. (2019)
Universal Access: The Challenges Ahead. In Universal Access in Human-Computer Interaction. Theory, Methods and Tools, (100-112). https://doi.org/10.1007/978-3-030-23560-4_8
It is approaching 20 years since the first issue of the International Journal on Universal Access was published and also that the first International Conference on Universal A...

Is the Zero-Wait Policy Always Optimum for Information Freshness (Peak Age) or Throughput?

Journal Article
Barakat, B., Keates, S., Wassell, I., & Arshad, K. (2019)
Is the Zero-Wait Policy Always Optimum for Information Freshness (Peak Age) or Throughput?. IEEE Communications Letters, 23(6), 987-990. https://doi.org/10.1109/LCOMM.2019.2907935
The Zero-Wait (ZW) policy is widely held to achieve maximum information 'freshness', i.e., to achieve minimum Peak Age (PA) and maximum throughput, for real-time Internet-of-T...

Deriving Machine to Machine (M2M) Traffic Model from Communication Model

Conference Proceeding
Barakat, B., Keates, S., Arshad, K., & Wassell, I. J. (2019)
Deriving Machine to Machine (M2M) Traffic Model from Communication Model. In The Fifth International Symposium on Innovation in Information and Communication Technology (ISIICT 2018), 27-31. doi:10.1109/ISIICT.2018.8613727
The typical traffic models proposed in literature can be considered as heuristic models since they only reflect the stochastic characteristic of the generated traffic. In this...

The benefits of contextual information for speech recognition systems

Conference Proceeding
Kinch, M. W., Melis, W. J., & Keates, S. (2018)
The benefits of contextual information for speech recognition systems. In The 10th Computer Science and Electronic Engineering Conference (CEEC)https://doi.org/10.1109/CEEC.2018.8674204
This paper demonstrates the significance of using contextual information in machine learning and speech recognition. While the benefits of contextual information in human comm...

When Universal Access is not quite universal enough: Case studies and lessons to be learned

Journal Article
Keates, S. (2020)
When Universal Access is not quite universal enough: Case studies and lessons to be learned. Universal Access in the Information Society, 19, 133-144. https://doi.org/10.1007/s10209-018-0636-2
While the theory of designing for Universal Access is increasingly understood, there remain persistent issues over realising products and systems that meet the goal of being a...

Enhancing Robotic Swarms With Fractal Behaviours to Explore Unknown Enclosed Areas

Presentation / Conference
Eissa, H., Melis, W. J. C., Keates, S., & Doncheva, R. (2018, June)
Enhancing Robotic Swarms With Fractal Behaviours to Explore Unknown Enclosed Areas. Paper presented at 3rd Medway Engineering Conference: Systems: Efficiency, Sustainability and Modelling
Swarm robotics coordinates multiple interacting robots for which it takes inspiration from nature. It has been used in different engineering applications, such as: food search...

When Universal Access does not go to plan: Lessons to be learned

Conference Proceeding
Keates, S. (2018)
When Universal Access does not go to plan: Lessons to be learned. In M. Antona, & C. Stephanidis (Eds.), 12th International Conference on Universal Access in Human-Computer Interaction (UAHCI 2018), Proceedings, Part I, 75-90. https://doi.org/10.1007/978-3-319-92049-8_6
While the theory of designing for Universal Access is increasingly understood, there remain persistent issues over realising products and systems that meet the goal of being a...

Computational Mechanics and the Finite Element Method

Book Chapter
Okereke, M., & Keates, S. (2018)
Computational Mechanics and the Finite Element Method. In J. Sun, H. Duan, S. Choi, Y. Fu, & C. Guardiola (Eds.), Finite Element Applications: A Practical Guide to the FEM Process, 3-25. Springer Verlag. https://doi.org/10.1007/978-3-319-67125-3_1
This textbook demonstrates the application of the finite element philosophy to the solution of real-world problems and is aimed at graduate level students, but is also suitabl...

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