Living with Pigments: The Colour Palette of Antarctic Life

Author(s):  
Juan José Marizcurrena ◽  
María Fernanda Cerdá ◽  
Diego Alem ◽  
Susana Castro-Sowinski
Keyword(s):  
2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Flore Mekki-Berrada ◽  
Zekun Ren ◽  
Tan Huang ◽  
Wai Kuan Wong ◽  
Fang Zheng ◽  
...  

AbstractIn materials science, the discovery of recipes that yield nanomaterials with defined optical properties is costly and time-consuming. In this study, we present a two-step framework for a machine learning-driven high-throughput microfluidic platform to rapidly produce silver nanoparticles with the desired absorbance spectrum. Combining a Gaussian process-based Bayesian optimization (BO) with a deep neural network (DNN), the algorithmic framework is able to converge towards the target spectrum after sampling 120 conditions. Once the dataset is large enough to train the DNN with sufficient accuracy in the region of the target spectrum, the DNN is used to predict the colour palette accessible with the reaction synthesis. While remaining interpretable by humans, the proposed framework efficiently optimizes the nanomaterial synthesis and can extract fundamental knowledge of the relationship between chemical composition and optical properties, such as the role of each reactant on the shape and amplitude of the absorbance spectrum.


2018 ◽  
Vol 16 (1) ◽  
pp. 35-54 ◽  
Author(s):  
Irving A. Cruz-Albarran ◽  
Juan P. Benitez-Rangel ◽  
Roque A. Osornio-Rios ◽  
Benjamin Dominguez-Trejo ◽  
David A. Rodriguez-Medina ◽  
...  
Keyword(s):  

Author(s):  
Barry Forshaw

This chapter addresses the sequel to The Silence of the Lambs (1991), Ridley Scott's Hannibal (2001). Both the colour palette and the tone of the new film were different from its predecessor, with a greater emphasis on primary colours and atmospheric chiaroscuro effects, and the material's black humour more accentuated. In keeping with the director's expertise in the realm of the epic, Hannibal was placed within a much more geographically sprawling canvas, with a great deal of the film shot in a beautifully evoked Florence, the city in which Hannibal Lecter is masquerading as the expert in Renaissance art, ‘Dr Fell’. Ridley Scott's assumption of the directorial reins proved highly successful and the film enjoyed immense popularity, breaking several box office records as it wittily opened on Valentine's Day of 2001. If the talented Julianne Moore was able to do less with the character of Clarice Starling than her predecessor, this was perhaps due to the extra level of confidence the FBI agent has acquired by this stage of her life. Professional though the actress's work was throughout, neither she nor her director could produce the kind of touching verisimilitude that was Jodie Foster's stock-in-trade in the first film. The chapter then looks at the prequels: Brett Ratner's Red Dragon (2002) and Peter Webber's Hannibal Rising (2007).


2021 ◽  
Vol 178 ◽  
pp. 112-116
Author(s):  
Alexander D. Logvinenko
Keyword(s):  

2014 ◽  
Vol 15 (3) ◽  
pp. 292-299 ◽  
Author(s):  
Ana Manhita ◽  
Lieve Balcaen ◽  
Frank Vanhaecke ◽  
Teresa Ferreira ◽  
António Candeias ◽  
...  

2020 ◽  
Vol 56 (50) ◽  
pp. 6866-6869
Author(s):  
Elley E. Rudebeck ◽  
Rosalind P. Cox ◽  
Toby D. M. Bell ◽  
Rameshwor Acharya ◽  
Zikai Feng ◽  
...  

An efficient and functional group tolerant route to access hydroxy 1,8-naphthalimides has been used to synthesise a range of mono- and disubstituted hydroxy-1,8-naphthalimides with fluorescence emissions covering the visible spectrum.


2020 ◽  
Vol 16 (4) ◽  
pp. 20200063
Author(s):  
Luke T. McDonald ◽  
Suresh Narayanan ◽  
Alec Sandy ◽  
Vinodkumar Saranathan ◽  
Maria E. McNamara

Extant weevils exhibit a remarkable colour palette that ranges from muted monochromatic tones to rainbow-like iridescence, with the most vibrant colours produced by three-dimensional photonic nanostructures housed within cuticular scales. Although the optical properties of these nanostructures are well understood, their evolutionary history is not fully resolved, in part due to a poor knowledge of their fossil record. Here, we report three-dimensional photonic nanostructures preserved in brightly coloured scales of two weevils, belonging to the genus Phyllobius or Polydrusus , from the Pleistocene (16–10 ka) of Switzerland. The scales display vibrant blue, green and yellow hues that resemble those of extant Phyllobius/Polydrusus . Scanning electron microscopy and small-angle X-ray scattering analyses reveal that the subfossil scales possess a single-diamond photonic crystal nanostructure. In extant Phyllobius/Polydrusus , the near-angle-independent blue and green hues function primarily in crypsis. The preservation of far-field, angle-independent structural colours in the Swiss subfossil weevils and their likely function in substrate matching confirm the importance of investigating fossil and subfossil photonic nanostructures to understand the evolutionary origins and diversification of colours and associated behaviours (e.g. crypsis) in insects.


2009 ◽  
Vol 57 (1) ◽  
pp. 19-29 ◽  
Author(s):  
C-C Chang ◽  
C-C Lin ◽  
Y-H Chen
Keyword(s):  

2012 ◽  
Vol 20 (2) ◽  
Author(s):  
Y. Hu ◽  
W. Chen ◽  
C. Lo ◽  
C. Wu

AbstractIn this paper we proposed an improved colour image quantization scheme based on predictive coding. Since the neighbouring colour pixels are quite similar in most colour images, the similarity among the encoded pixels is exploited. In the proposed scheme the encoded distinct neighbouring colours are collected to form a smaller state-palette. If the closest colour in the state-palette is quite similar to the current encoding colour pixel, the index of the closest colour in the state-palette is recorded. Otherwise, the closest colour in original colour palette for the current encoding colour pixel is searched and the corresponding index is recorded. The experimental results show that the proposed method achieves good image qualities while requiring much lower bit rates for colour image compression.


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