Results 31 to 40 of about 603,770 (327)
PLoS ONE, 2009 The perception of brightness depends on spatial context: the same stimulus can appear light or dark depending on what surrounds it. A less well-known but equally important contextual phenomenon is that the colour of a stimulus can also alter its brightness. Specifically, stimuli that are more saturated (i.e.
Corney, D +3 more
openaire +7 more sources
Química Nova, 2011 Samples of Kaolin from different regions in Brazil were characterized by XRD, SEM and chemical analysis. A chemical bleaching study with pH adjustment was accomplished with the fractions below 37 μm, after classification by screening.
Fernanda Arruda Nogueira Gomes da Silva +6 more
doaj +1 more source
Age and Ageing, 2008 the size of the burden of unmet needs of older people living in the community is unknown. We aim to validate a brief postal questionnaire, the Brief Risk Identification of Geriatric Health Tool (BRIGHT) questionnaire, to find cases of older people with disabilities (case-finding) living in the community.community-dwelling patients over the age of 75 ...
Christine McLean +4 more
openaire +3 more sources
Properties of bright squeezed vacuum at increasing brightness [PDF]
Physical Review Research, 2020 Bright squeezed vacuum (BSV) is a non-classical macroscopic state of light, which can be generated through high-gain parametric down-conversion or four-wave mixing. Although BSV is an important tool in quantum optics and has a lot of applications, its theoretical description is still not complete.
Maria V. Chekhova +13 more
openaire +4 more sources
Data‐driven performance metrics for neural network learning
International Journal of Adaptive Control and Signal Processing, EarlyView., 2023 Summary Effectiveness of data‐driven neural learning in terms of both local mimima trapping and convergence rate is addressed. Such issues are investigated in a case study involving the training of one‐hidden‐layer feedforward neural networks with the extended Kalman filter, which reduces the search for the optimal network parameters to a state ...
Angelo Alessandri +2 more
wiley +1 more source
Applying Classical and Intelligence Techniques for Digital Image Contrast Enhancement [PDF]
Al-Rafidain Journal of Computer Sciences and Mathematics, 2008 Modern digital camera technology has produced huge services for the users from different ages and specifications .It made it easer to have images, but the user still needs to enhance those images, which have some problems when taken by the camera, for ...
Alyaa taqi
doaj +1 more source
Error Analysis of Atmospheric Visibility Measurements Based on an Image Brightness Contrast Method
IEEE Access, 2020 The method of image visibility detection is one of the methods closest to human vision. It is based on the principle of human eye observation but avoids the errors resulting from human subjectivity.
Min Wang +3 more
doaj +1 more source
Journal of General and Family Medicine, 2018 The spine is homogeneously osteosclerotic and which appears to have no particular abnormal findings, however, that was proved to be a result of multiple metastases from prostate cancer. We should consider the possibility of prostate cancer if we see a "bright spine" on X-ray examination.
Ogushi, Akihiko +2 more
openaire +2 more sources
'Round the Clock Observations of the Q0957+561 A,B Gravitationally Lensed Quasar [PDF]
, 2001 An observing campaign with 10 participating observatories has undertaken to monitor the optical brightness of the Q0957 gravitationally lensed quasar for 10 consecutive nights in January 2000.
Alex Oscoz +23 more
core +1 more source