- Floor 2, Marine Building, Drake Circus, Plymouth, PL4 8AA
- +44 1752 584883
- emlyn.davies@plymouth.ac.uk

Profiles
Mr Emlyn Davies
Associate Lecturer
Biography
Biography
I am now working as a research scientist at SINTEF, Norway. My email is: emlyn.john.davies@sintef.noResearch Scientist: "Marine Optics"Active research topics include:
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PhD Thesis: "Scattering Properties of Suspended Particles"
NERC Studentship in collaboration with The National Oceanography Centre and Sequoia Scientific Inc.
Supervisors:Aim:
To investigate the optical scattering characteristics of marine particles, with a view to improving the determination of their size.
Importance:
Improving the determination of marine particle characteristics is important because suspended particles:
It is therefore crucial to have an accurate measurement of suspended particle characteristics so that we can effectively monitor the marine environment
Many instruments for measuring particles rely on optical and acoustic scattering from the particles, and use Mie Theory or an alternate algorithm, to infer a particle size and concentration. However, these predictions have a number of significant restrictions. For example, Mie Theory assumes that the particles are spherical and of a known composition, and tested alternate algorithms do not cover the full range of particle sizes or types found within the marine environment. Various imaging techniques have proved that particles vary greatly in their shape and composition (Figure 1). As a result, there is significant uncertainty in the response of light scattering instruments to this diverse range of particles. | Figure 1: Examples of flocs recorded by digital holography. (Scale bar = 0.5 mm.) |
Key Findings:
Emlyn J. Davies, W. Alex M. Nimmo-Smith, Yogesh C. Agrawal, and Alejandro J. Souza, (2011), "Scattering signatures of suspended particles: an integrated system for combining digital holography and laser diffraction," Opt. Express 19, 25488-25499.
George W. Graham, Emlyn J. Davies, W. Alex M. Nimmo-Smith, David G. Bowers, and Katherine M. Braithwaite, (2012), "Interpreting LISST-100X measurements of particles with complex shape using Digital In-line Holography", Journal of Geophysical Research - Oceans.
Emlyn J. Davies, W. Alex M. Nimmo-Smith, Yogesh C. Agrawal, and Alejandro J. Souza, (2012), "LISST-100 response to large particles", Marine Geology, 307-310.
Emlyn J. Davies, W. Alex M. Nimmo-Smith, Yogesh C. Agrawal, and Alejandro J. Souza, (2012), "Interpreting Forward Scattering from Complex Marine Particles", Ocean Optics, Glasgow, UK. (Extended abstract, oral presentation & poster)
Qualifications
2006-2009: BSc (Hons) Ocean Science, School of Earth, Ocean and Environmental Science, University of Plymouth. Dissertation title: "Dynamics of Suspended Particulate Matter in the Lower Tamar Estuary".
Professional membership
Teaching
Teaching
Teaching interests
Marine Optics & Acoustics (EOE2307) - 2012/2013 (Module leader, Dr Sarah Bass):
Research
Research
Research interests
Other research
Grants & contracts
Publications
Publications
Peer Reviewed Journal Articles:
Emlyn J. Davies, W. Alex M. Nimmo-Smith, Yogesh C. Agrawal, and Alejandro J. Souza, (2011), "Scattering signatures of suspended particles: an integrated system for combining digital holography and laser diffraction," Opt. Express 19, 25488-25499.
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-25-25488
Conference Abstracts:
Emlyn J. Davies, W. Alex M. Nimmo-Smith, Yogesh C. Agrawal, and Alejandro J. Souza, (2012), "Evaluating the LISST-100 Response to Complex Marine Particles", Particles in Europe (PiE), Barcelona, Spain. (Extended abstract & oral presentation)
Emlyn J. Davies, W. Alex M. Nimmo-Smith, George W. Graham, (2012), "Sequoia's LISST-HOLO: Results from a bedframe deployment in the Menai Strait, Wales", Oceanology International, London, UK. (Demonstration & poster). Invited.
Emlyn J. Davies, George W. Graham, W. Alex M. Nimmo-Smith, (2012), "Towards understanding particle size distributions derived from laser diffraction", AGU/ASLO/TOS Ocean Sciences Meeting, Salt Lake City, Utah, USA. (Oral presentation)
Emlyn J. Davies, W. Alex M. Nimmo-Smith, Yogesh C. Agrawal, and Alejandro J. Souza, (2010), "An integrated System for testing laser diffraction", Particles in Europe (PiE), Villefranche-sur-Mer, France. (Extended abstract & oral presentation)
Emlyn J. Davies, W. Alex M. Nimmo-Smith, Yogesh C. Agrawal, and Alejandro J. Souza, (2010), "Scattering signatures of suspended sediments", Challenger Conference for Marine Sciences, Southampton, UK. (Oral presentation)
Emlyn J. Davies and W. Alex M. Nimmo-Smith, (2010), “Dynamics of suspended particulate matter in the lower Tamar Estuary”, Plymouth Student Scientist, 3(2), 63-108.
Personal
Personal
Conferences organised
• October 2012: LISST-HOLO Workshop, Particles in Europe (PiE) Meeting (assistance with organisation & delivery)