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Single Metalens Focuses All Colors Of The Rainbow In One Point（图）
Single Metalens All Colors Rainbow One Point
2018/1/10
Metalenses — flat surfaces that use nanostructures to focus light — promise to revolutionize optics by replacing the bulky, curved lenses currently used in optical devices with a simple, flat surface....
Penn-led Study Identifies Genes Responsible for Diversity of Human Skin Colors（图）
Penn-led Study Identifies Genes Responsible Diversity of Human Skin Colors
2017/10/25
Human populations feature a broad palette of skin tones. But until now, few genes have been shown to contribute to normal variation in skin color, and these had primarily been discovered through studi...
True Colors:Using Molecular Analysis to Clarify Dino Color Claims
True Colors Molecular Analysis Dino Color Claims
2015/10/13
The color of dinosaurs is a fascinating topic, and in recent years the discovery of melanosomes – small, pigment-filled sacs – associated with fossilized dinosaur feathers has given rise to all sorts ...
Investigation of MC1R SNPs and Their Relationships with Plumage Colors in Korean Native Chicken
Korean Native Chicken MC1R Plumage Color SNPs
2016/5/11
The melanocortin 1 receptor (MC1R) gene is related to the plumage color variations in chicken. Initially, the MC1R gene from 30 individuals was sequenced and nine polymorphisms were obtained. Of these...
A recent question in generalized Ramsey theory is that for fixed positive integers $s\leq t$, at least how many vertices can be covered by the vertices of no more than $s$ monochromatic members of the...
We prove that every claw-free graph $G$ that doesn't contain a clique on $\Delta(G) \geq 9$ vertices can be $\Delta(G) - 1$ colored.
AGN Unification at z ~ 1: u - R Colors and Gradients in X-ray AGN Hosts
Unification Colors Gradients Hosts
2011/10/8
We present uncontaminated rest-frame u - R colors of 78 X-ray-selected AGN hosts at 0.5 < z < 1.5 in the Chandra Deep Fields measured with HST/ACS/NICMOS and VLT/ISAAC imaging. We also present spatial...
Discovering the missing 2.2asars by combining optical variability and optical/near-IR colors
Discovering missing quasars combining variability optical/near-IR colors
2011/9/27
The identifications of quasars in the redshift range 2.2are known to be very inefficient as their optical colors are indistinguishable from those of stars. Recent studies have proposed to use opt...
Fossilized Giant Penguin Reveals Unusual Colors, Sheds Light on Bird Evolution（图）
Fossilized Giant Penguin Unusual Colors Bird Evolution
2010/10/13
AUSTIN, Texas—Paleontologists have unearthed the first extinct penguin with preserved evidence of scales and feathers. The 36-million-year-old fossil from Peru shows the new giant penguin’s feathers w...