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- De Moor, K., et al.
(author)
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Influence of high ambient illuminance and display luminance on readability and subjective preference
- 2015
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In: Proceedings of SPIE - The International Society for Optical Engineering. - Bellingham, WA, USA : SPIE. - 9781628414844
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Conference paper (peer-reviewed)abstract
- Many devices, such as tablets, smartphones, notebooks, fixed and portable navigation systems are used on a (nearly) daily basis, both in in- and outdoor environments. It is often argued that contextual factors, such as the ambient illuminance in relation to characteristics of the display (e.g., surface treatment, screen reflectance, display luminance...) may have a strong influence on the use of such devices and corresponding user experiences. However, the current understanding of these influence factors is still rather limited. In this work, we therefore focus in particular on the impact of lighting and display luminance on readability, visual performance, subjective experience and preference. A controlled lab study (N=18) with a within-subjects design was performed to evaluate two car displays (one glossy and one matte display) in conditions that simulate bright outdoor lighting conditions. Four ambient luminance levels and three display luminance settings were combined into 7 experimental conditions. More concretely, we investigated for each display: (1) whether and how readability and visual performance varied with the different combinations of ambient luminance and display luminance and (2) whether and how they influenced the subjective experience (through self-reported valence, annoyance, visual fatigue) and preference. The results indicate a limited, yet negative influence of increased ambient luminance and reduced contrast on visual performance and readability for both displays. Similarly, we found that the self-reported valence decreases and annoyance and visual fatigue increase as the contrast ratio decreases and ambient luminance increases. Overall, the impact is clearer for the matte display than for the glossy display.
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- Drott, J, et al.
(author)
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Pore morphology influence on catalytic turn-over for enzyme activated porous silicon matrices
- 1998
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In: THIN SOLID FILMS. - : ELSEVIER SCIENCE SA. - 0040-6090. ; 330:2, s. 161-166
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Journal article (other academic/artistic)abstract
- The enzyme glucose oxidase (GOx) was coupled to porous silicon of different morphologies and the catalytic turn-over of glucose was recorded for the samples. The recorded catalytic turn-over of the samples clearly indicated the influence of morphology, wi
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- Drott, J, et al.
(author)
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Porous silicon carrier matrices in micro enzyme reactors-influence of matrix depth
- 1999
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In: MIKROCHIMICA ACTA. - : SPRINGER-VERLAG WIEN. - 0026-3672. ; 131:1-2, s. 115-120
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Journal article (other academic/artistic)abstract
- The influence of the carrier matrix depth was investigated for porous silicon enzyme reactors. For the experiments, [110] oriented silicon, p-type (20-70 Ohm cm), was used. Porous silicon was generated on planar surfaces and on anisotropically pre-etched
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- Johansson, M, et al.
(author)
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A Prospective Study of Etiology and Auditory Profiles in Infants with Congenital Unilateral Sensorineural Hearing Loss
- 2022
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In: Journal of clinical medicine. - : MDPI AG. - 2077-0383. ; 11:14
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Journal article (peer-reviewed)abstract
- Congenital unilateral sensorineural hearing loss (uSNHL) is associated with speech-language delays and academic difficulties. Yet, controversy exists in the choice of diagnosis and intervention methods. A cross-sectional prospective design was used to study hearing loss cause in twenty infants with congenital uSNHL consecutively recruited from a universal neonatal hearing-screening program. All normal-hearing ears showed ≤20 dB nHL auditory brainstem response (ABR) thresholds (ABRthrs). The impaired ear median ABRthr was 55 dB nHL, where 40% had no recordable ABRthr. None of the subjects tested positive for congenital cytomegalovirus (CMV) infection. Fourteen subjects agreed to participate in magnetic resonance imaging (MRI). Malformations were common for all degrees of uSNHL and found in 64% of all scans. Half of the MRIs demonstrated cochlear nerve aplasia or severe hypoplasia and 29% showed inner ear malformations. Impaired ear and normal-hearing ear ABR input/output functions on a group level for subjects with ABRthrs < 90 dB nHL were parallel shifted. A significant difference in interaural acoustic reflex thresholds (ARTs) existed. In congenital uSNHL, MRI is powerful in finding a possible hearing loss cause, while congenital CMV infection may be relatively uncommon. ABRs and ARTs indicated an absence of loudness recruitment, with implications for further research on hearing devices.
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