Results 21 to 30 of about 641,900 (344)

The Brightness of Colour

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, Haynes, JD, Rees, G, Lotto, RB   +3 more
openaire   +6 more sources

Virtual Filter Membranes in a Microfluidic System for Sorting and Separating Size-Based Micro Polystyrene Beads by Illumination Intensity Design in Optically Induced Dielectrophoresis (ODEP)

Chemosensors, 2022
In biomedical diagnosis, the efficient separation and purification of specific targets from clinical samples is the desired first step. Herein, the concept of virtual filter membranes based on optically-induced dielectrophoresis (ODEP) manipulation in a ...
Chia-Ming Yang, Ai-Yun Wu, Jian-Cyun Yu, Po-Yu Chu, Chia-Hsun Hsieh, Min-Hsien Wu   +5 more
doaj   +1 more source

Alvejamento químico de caulins Brasileiros: efeito do potencial eletroquímico da polpa e do ajuste do pH

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, Francisco Manoel dos Santos Garrido, Marta Eloísa Medeiros, João Alves Sampaio, Adão Benvindo da Luz, Lívia da Silva Mello, Flávio Teixeira da Silva   +6 more
doaj   +1 more source

Towards an Understanding of the Mid-Infrared Surface Brightness of Normal Galaxies [PDF]

, 1999
We report a mid-infrared color and surface brightness analysis of IC 10, NGC 1313, and NGC 6946, three of the nearby galaxies studied under the Infrared Space Observatory Key Project on Normal Galaxies.
Abergel A., Alessandra Contursi, Boulanger F., Boulanger F., Cesarsky C. J., Cesarsky D., Contursi A., Daniel A. Dale, Desert F.-X., George Helou, Harnett J. I., Helou G., Kessler M., Kunze M., Langer N., Lequeux J., Malhotra S., Massey P., Nancy A. Silbermann, Ohta K., Pilyugin L. S., Robert H. Rubin, Sangeeta Malhotra, Sauvage M., Shostak G. S., Timmerman R., Tuffs R. J., Valentijn E. A., Vigroux L., Walsh J. R.   +29 more
core   +3 more sources

A Cortical Edge-integration Model of Object-Based Lightness Computation that Explains Effects of Spatial Context and Individual Differences

Frontiers in Human Neuroscience, 2014
Previous work demonstrated that perceived surface reflectance (lightness) can be modeled in simple contexts in a quantitatively exact way by assuming that the visual system first extracts information about local, directed steps in log luminance, then ...
Michael E Rudd, Michael E Rudd
doaj   +1 more source

The Impact of Effective Microorganisms on Flesh Color and Chemical Composition of Raw Potato Tubers

Applied Sciences, 2021
The objective of this study was to develop an innovative method of potato cultivation, with limited use of chemicals, for use in food processing.
Piotr Pszczółkowski, Barbara Krochmal-Marczak, Barbara Sawicka, Mateusz Pszczółkowski   +3 more
doaj   +1 more source

Measuring the brightness temperature distribution of extragalactic radio sources with space VLBI [PDF]

, 2001
We have used VSOP space very long baseline interferometry observations to measure the brightness temperature distribution of a well-defined sub-set of the Pearson-Readhead sample of extragalactic radio sources.
A. C. S. Readhead, B. G. Piner, Blandford R. D., D. L. Jones, D. L. Meier, D. W. Murphy, Gehan E., H. Hirabayashi, H. Kobayashi, Hirabayashi H., Hirabayashi H., Levy G. S., M. Inoue, M. L. Lister, Quirrenbach A., R. A. Preston, S. J. Tingay, Shepherd M. C., T. J. Pearson, Terasranta H., Y. Murata   +20 more
core   +3 more sources

Sonification as a possible stroke rehabilitation strategy

Frontiers in Neuroscience, 2014
Despite cerebral stroke being one of the main causes of acquired impairments of motor skills worldwide, well-established therapies to improve motor functions are sparse.
Daniel S. Scholz, Liming eWu, Johann eSchneider, Jonas ePirzer, Michael eGrossbach, Jens Dieter Rollnik, Eckart O Altenmüller   +6 more
doaj   +1 more source

The Faint End of the Luminosity Function and Low Surface Brightness Galaxies [PDF]

, 2012
SHELS (Smithsonian Hectospec Lensing Survey) is a dense redshift survey covering a 4 square degree region to a limiting R = 20.6. In the construction of the galaxy catalog and in the acquisition of spectroscopic targets, we paid careful attention to the ...
Andreon, Antonaldo Diaferio, Balogh, Benson, Blanton, Blanton, Christlein, Daniel G. Fabricant, de Jong, Disney, Efstathiou, Geller, Geller, Grebel, Ian P. Dell'Antonio, Kurtz, Liu, Lynden-Bell, Mahdavi, Margaret J. Geller, McGaugh, Michael J. Kurtz, Mink, Mobasher, O'Neil, Rines, Sprayberry, Takeuchi, White, Wittman, Woods   +30 more
core   +2 more sources

Physical Characteristics of Small Space Objects at High Orbits Based on Optical Methods [PDF]

Journal of Astronomy and Space Sciences, 2017
Optical observation is one of the most common techniques used for characterizing the physical properties of unknown objects and debris in space. This research presents measurements and properties of the new object 96019 from ground-based optical ...
Afaf M. Abd El-Hameed, Gamal F. Attia, Yehia Abdel-Aziz   +2 more
doaj   +1 more source