Group members
Steve Fotios
Member since 2005
Steve was an engineer. His PhD (UMIST, 1997) was an investigation of spatial brightness at photopic levels. He proposed a brightness model that included the short-wavelength cones and twenty years later finally completed a satisfactory literature review of spatial brightness. He is somewhat cynical about data gathered using rating scales and spurious myths in lighting.
Steve leads the group, with responsibility for the overall strategy, publications, external funding and achieving impact.
Email: steve.fotios@sheffield.ac.uk
Jim Uttley
Member since 2012
Jim is a psychologist. His PhD (Sheffield University, 2016) used eye tracking to find out where pedestrians look when walking in a natural environment and then used an experiment to identify optimal lighting for a task (obstacle detection) suggested by the eye tracking to be important. He is interested in making sure statistical analyses are carried out properly.
Jim leads work on data analyses for promoting active travel.
Email: j.uttley@sheffield.ac.uk
Yichong Mao
Member since 2017
Yichong initially trained as an architect. His PhD (Sheffield University, 2021) studied those tasks used in pedestrian lighting research to ask whether those conclusions hold when we focus on more than one task at the same time.
Yichong is a researcher on the HAROLD project.
Email: yichong.mao@sheffield.ac.uk
Chris Cheal
Member since 2005
Chris originally studied physics. Later on he completed a PhD (Sheffield University, 2007) looking at how the spectrum of street lighting affects brightness and visual performance for pedestrians. This work is reported in several papers.
Chris designs and builds the apparatus we use in experimental research.
Email: chris.cheal@sheffield.ac.uk
Demet Yesiltepe
Member since 2022
Demet is an urban planner and designer. She develops her research in the fields of the built environment and active travel. Her PhD research (Northumbria University, 2021) aimed to understand how spatial layouts, particularly landmarks, affect people’s navigational performance. In this research, Demet examined a game, Sea Hero Quest (SHQ), which was developed to understand Alzheimer’s and was played by more than 4.3 million people around the world.
Demet is a research associate and works on EPSRC-funded project SATURN (Supporting Active Travel Using Road-lighting at Night).
Email: d.yesiltepe@sheffield.ac.uk
Gavin Tolan
Member since 2023
Gavin is a physicist, with previous experience in civil engineering and street theatre. His PhD thesis (Sheffield Hallam University, 2008) ivestigated different techniques for manufacturing photovoltaic cells.
Gavin runs the laboratory, building apparatus to support our research projects.
Email: gavin.tolan@sheffield.ac.uk