1,721,066 research outputs found
Dataset for Point-dipole approximation for small systems of strongly coupled radiating nanorods
No full textDataset supporting:
Watson, D. W. et al (2019). Point dipole and quadrupole scattering approximation to collectively responding resonator systems. Scientific Reports.</span
Food Safety Cultural Conundrum in the 21st Century
No full textThis paper takes a critical look as the global failing in reducing the number of food safety contaminations. As evidenced in the fifth global pandemic since 1918, we simply do not learn from past failings. In the 21st century we still have over 6 million cases of food poisoning on a global scale and a subsequent 450,000 deaths as year. This paper takes a critical look at the failings in the food sector and provides presents the enlighten food safety culture model to help reduce the rate of food contaminations and increase the profitability of food manufactures operations
How to leave a research footprint in the changing sands of academia: The Panamanian Suvlas Experience
No full textHow to survive your doctoral journey
No full textListen to Dr Derek Watson as he offers you his opinion and tips on 'How To Survive Your Doctoral Journey'' including a UK Viva examination. In this video, Derek will give you the advice he offers to his own research degree students. Even if you attend a different university, do a different type of research doctorate, have a different type of supervisory team, write your research degree Thesis to a different structure, or attend a different type of Viva examination: you are sure to find some useful guidance here! Please note: this video will be most useful for those who are considering or starting their research degree
‘How to get Food Safety Culture back into the Boardroom’. 1st International Food Safety Culture Conference
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A strategic approach to enhancing SMEs in the fast-food restaurant sector within the Nigerian economy.
No full textHow hotel industry food safety culture can be assessed and developed? The managers perspectives
No full textCollective scattering of subwavelength resonators in metamaterial systems
No full textIn this thesis, we model the electromagnetic (EM) interactions between plasmonic resonators and an incident EM field. By capturing the fundamental physics of each resonator, such as its resonance frequency and radiative decay rate, the dynamics of the EM interactions can be modeled by a linear set of equations. The system's eigenmodes exhibit characteristic line shifts and linewidths that may be subradiant or superradiant.For simple resonator systems, we approximate each resonator as a point electric dipole. Nanorods and nanobars, are such resonators where the magnetization can be assumed to be negligible. However, closely spaced parallel electric dipoles can exhibit EM properties similar to higher order multipoles, e.g., electric quadrupoles. We show how, in an original way, simple systems comprising closely spaced parallel pairs of electric dipoles can be approximated as electric quadrupole and magnetic dipole resonators. When the resonators are close, their finite-size and geometry is important to the EM interactions, and we show how we cope with these important factors in our model.We analyze in detail a nanorod configuration comprising pairs of plasmonic nanorods - a toroidal metamolecule, and show how the elusive toroidal dipole moment appears as a radiative eigenmode. In this original work, we find that the radiative interactions in the toroidal metamolecule can be qualitatively represented by our point electric dipole approximation and finite-size resonator model. The results demonstrate how the toroidal dipole moment is subradiant and difficult to excite by incident light. By means of breaking the geometric symmetry of the metamolecule, we show the toroidal mode can be excited by linearly polarized light and that it appears as a Fano resonance dip in the forward scattered light. We provide simple optimization protocols for maximizing the toroidal dipole mode excitation. This opens up possibilities for simplified control and driving of metamaterial arrays consisting of toroidal dipole unit-cell resonators
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