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Rogers A, Akram P, Batchelor JM, Crutchley J, Grocki M, Haines RH, Meakin G, O'Dowd K, Ravenscroft J, Thomas KS. Quality assurance and characterization of narrowband ultraviolet B devices for use at home: lessons from the HI-Light Vitiligo Trial. Br J Dermatol 2020; 184:954-955. [PMID: 33107975 PMCID: PMC8246568 DOI: 10.1111/bjd.19630] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 10/08/2020] [Accepted: 10/25/2020] [Indexed: 11/30/2022]
Affiliation(s)
- A Rogers
- Department of Medical Physics and Clinical Engineering, Nottingham University Hospitals NHS Trust, Nottingham, NG7 2UH, UK
| | - P Akram
- Department of Medical Physics and Clinical Engineering, Nottingham University Hospitals NHS Trust, Nottingham, NG7 2UH, UK
| | - J M Batchelor
- Centre of Evidence Based Dermatology, King's Meadow Campus, Lenton Lane, Nottingham, NG7 2NR, UK
| | - J Crutchley
- Department of Medical Physics and Clinical Engineering, Nottingham University Hospitals NHS Trust, Nottingham, NG7 2UH, UK
| | - M Grocki
- Department of Medical Physics and Clinical Engineering, Nottingham University Hospitals NHS Trust, Nottingham, NG7 2UH, UK
| | - R H Haines
- Nottingham Clinical Trials Unit, University of Nottingham, Queen's Medical Centre, Nottingham, NG7 2UH, UK
| | - G Meakin
- Nottingham Clinical Trials Unit, University of Nottingham, Queen's Medical Centre, Nottingham, NG7 2UH, UK
| | - K O'Dowd
- Department of Medical Physics and Clinical Engineering, Nottingham University Hospitals NHS Trust, Nottingham, NG7 2UH, UK
| | - J Ravenscroft
- Department of Dermatology, Nottingham University Hospitals NHS Trust, Nottingham, NG7 2UH, UK
| | - K S Thomas
- Centre of Evidence Based Dermatology, King's Meadow Campus, Lenton Lane, Nottingham, NG7 2NR, UK
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Abstract
In the most general case, haptic perception of an object's heaviness is most likely the perception of the object's resistance to movement, determined jointly by the object's mass and mass distribution. In two experiments with occluded objects wielded freely in three dimensions, we showed additive effects on perceived heaviness of mass and the inertia tensor. Our manipulations of the inertia tensor were directed specifically at the volume and symmetry of the inertia ellipsoid, quantities that can be understood as important to controlling the level and patterning of muscular forces, respectively. Ellipsoid volume and symmetry were found to have separate effects on perceptual reports of heaviness that were invariant over different tensors. Independent sensitivities to translational inertia and particular characterizations of rotational inertia suggest specialized somatosensory attunement to the rigid body laws.
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Affiliation(s)
- K Shockley
- Center for the Ecological Study of Perception and Action, University of Connecticut, Storrs 06269-1020, USA.
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