Publications by authors named "M J Homer"

An organ-on-a-chip (OOAC) is a microscale device designed to mimic the functions and complexity of human physiology. Different from traditional culture systems, OOACs are capable of replicating the biochemical microenvironment, tissue-tissue interactions, and mechanical dynamics of organs thanks to the precise control offered by microfluidic technology. Diverse OOAC devices specific to different organs have been proposed for experimental research and applications such as disease modelling, personalized medicine and drug screening.

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Background: Minimising examiner differences in scoring in OSCEs is key in supporting the validity of the assessment outcomes. This is particularly true for common OSCE designs where the same station is administered across parallel circuits, with examiners nested within these. However, the common classification of extreme examiners as 'hawks' or 'doves' can be overly simplistic.

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Article Synopsis
  • Spatial fractionation of proton fields in cancer treatment improves sparing of healthy tissue while ensuring tumor control.
  • This study demonstrated the use of the National Physical Laboratory's Primary Standard Proton Calorimeter to measure absorbed dose in a proton beam with a specific configuration.
  • Results indicated that uncertainty in absorbed dose measurements was mainly due to positioning accuracy, suggesting that reference dosimetry should focus on measuring Dose-Area Product or using SOBP for more reliable outcomes in spatially fractionated fields.
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Using cyclic voltammetry under illumination, we recently demonstrated that CdS quantum dots (QDs) form charge donor states that live for at least several minutes after illumination ends, ∼12 orders of magnitude longer than expected for free carriers. This time scale suggests that the conventionally accepted mechanism of charge transfer, wherein charges directly transfer to an acceptor following exciton dissociation, cannot be complete. Because of these long time scales, this unconventional pathway is not readily observed using time-resolved spectroscopy to probe charge transfer dynamics.

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