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Outputs (258)

Optical performances of refractive Crossed Compound Parabolic Concentrator CCPC (2014)
Presentation / Conference Contribution
Sellami, N., & Mallick, T. (2014, September). Optical performances of refractive Crossed Compound Parabolic Concentrator CCPC. Presented at 29th European Photovoltaic Solar Energy Conference and Exhibition, Amsterdam

The design of solar concentrators depends on its application (thermal or PV) and on the tracking system that will be used. Low geometrical concentration ratios (Cg) are <10x and generally tend to be static concentrators; in this case they have to be...

Mapping on surfaces: Supporting collaborative work using interactive tabletop (2014)
Presentation / Conference Contribution
Sinmai, K., & Andras, P. (2014, September). Mapping on surfaces: Supporting collaborative work using interactive tabletop. Presented at Collaboration and Technology: 20th International Conference, CRIWG 2014, Santiago, Chile

We investigate the usability of our mindmap application using a tabletop integrated with four Android tablets in the context of support for collaborative work. This paper presents two empirical studies that compares the conventional paper-and-pen app... Read More about Mapping on surfaces: Supporting collaborative work using interactive tabletop.

Heat Exchanger Networks Retrofitted with Simultaneous Pressure Recovery (2014)
Presentation / Conference Contribution
Onishi, V., Ravagnani, M., & Caballero, J. A. (2014, October). Heat Exchanger Networks Retrofitted with Simultaneous Pressure Recovery. Presented at XX Brazilian Congress of Chemical Engineering – COBEQ 2014, Florianópolis-SC, Brazil

This paper presents a new optimization model for the retrofit of heat exchanger networks (HENs), in which the pressure recovery of streams is used to enhance heat integration. Especially important in sub-ambient processes, the HEN retrofit with press... Read More about Heat Exchanger Networks Retrofitted with Simultaneous Pressure Recovery.

Advances in Additive Manufacturing Processes (2014)
Presentation / Conference Contribution
Oppon, C., Hackney, P., Shyha, I., & Beeby, J. (2014, August). Advances in Additive Manufacturing Processes. Presented at 3rd Applied Research Conference in Africa, Accra, Ghana

Additive Manufacturing (AM) which is also referred as Three Dimensional Printing (3DP), Solid Freeform Fabrication (SFF) or Rapid Prototyping (RP) is a layer-by-layer technique of producing a three-dimensional (3D) objects directly from a digital mod... Read More about Advances in Additive Manufacturing Processes.

Controllability for positive discrete–time linear systems with positive state (2014)
Presentation / Conference Contribution
Guiver, C., & Townley, S. (2014, July). Controllability for positive discrete–time linear systems with positive state. Presented at The 21st International Symposium on Mathematical Theory of Networks and Systems, Groningen, The Netherlands

Controllability of componentwise nonnegative discrete-time linear systems is considered. The key difference here from the well-established positive systems theory is that we permit the case where the input takes negative values, provided that the sta... Read More about Controllability for positive discrete–time linear systems with positive state.

A stability/instability trichotomy for non-negative Lur'e systems (2014)
Presentation / Conference Contribution
Bill, A., Guiver, C., Logemann, H., & Townley, S. (2014, July). A stability/instability trichotomy for non-negative Lur'e systems. Presented at 21st International Symposium on Mathematical Theory of Networks and Systems, Groningen, The Netherlands

We identify a stability/instability trichotomy for a class of non-negative continuous-time Lur'e systems. Asymptotic as well as input-to-state stability concepts (ISS) are considered. The presented trichotomy rests on Perron-Frobenius theory, absolut... Read More about A stability/instability trichotomy for non-negative Lur'e systems.

Bounds on the dynamics of sink populations with noisy immigration (2014)
Journal Article
Eager, E. A., Guiver, C., Hodgson, D., Rebarber, R., Stott, I., & Townley, S. (2014). Bounds on the dynamics of sink populations with noisy immigration. Theoretical Population Biology, 92, 88-96. https://doi.org/10.1016/j.tpb.2013.12.004

Sink populations are doomed to decline to extinction in the absence of immigration. The dynamics of sink populations are not easily modelled using the standard framework of per capita rates of immigration, because numbers of immigrants are determined... Read More about Bounds on the dynamics of sink populations with noisy immigration.

Mathematical Model for Calibration of Nonlinear Responses in Biological Media Exposed to RF Energy (2014)
Presentation / Conference Contribution
See, C., Abd-Alhameed, R., & Excell, P. (2014, March). Mathematical Model for Calibration of Nonlinear Responses in Biological Media Exposed to RF Energy. Presented at 9th IET International Conference on Computation in Electromagnetics (CEM 2014), London, UK

This paper presents a circuit model which is used to calibrate the performance of nonlinear RF energy conversion inside a high quality factor resonant cavity with a known nonlinear loading device. The nonlinear radiofrequency energy conversion can be... Read More about Mathematical Model for Calibration of Nonlinear Responses in Biological Media Exposed to RF Energy.

Acoustic Emission Source Identification in Pipes Using Finite Element Analysis (2014)
Presentation / Conference Contribution
Abolle, J., Palacio Torralba, J., Chen, Y., & Reuben, R. (2015, April). Acoustic Emission Source Identification in Pipes Using Finite Element Analysis. Presented at 31st Conference of the European Working Group on Acoustic Emission

Stress waves propagate through a structure when it experiences rapid changes in loading, which can come about from a number of phenomena of interest in mechanical and process engineering. One class of applications is in structural health monitoring,... Read More about Acoustic Emission Source Identification in Pipes Using Finite Element Analysis.