Results 111 to 120 of about 880,117 (356)

The Optical to Mid-Infrared Extinction Law Based on the APOGEE, Gaia DR2, Pan-STARRS1, SDSS, APASS, 2MASS and WISE Surveys [PDF]

open access: yes, 2019
A precise interstellar dust extinction law is critically important to interpret observations. There are two indicators of extinction: the color excess ratio (CER) and the relative extinction. Compared to the CER, the wavelength-dependent relative extinction is more challenging to be determined.
arxiv   +1 more source

Complex Oxide‐metal Hybrid Metamaterials with Integrated Magnetic and Plasmonic Non‐noble Metal Nanostructures

open access: yesAdvanced Functional Materials, EarlyView.
A new alloy‐oxide vertically aligned nanocomposite (VAN) thin film with two immiscible non‐noble metal elements of Co and Cu embedded in BaTiO3 (BTO) matrix is designed and fabricated, which presents interesting magnetic, ferroelectric, and optical properties.
Jijie Huang   +7 more
wiley   +1 more source

TEST OF THE ISLAND BIOGEOGRAPHY THEORY WITH BOULDERS IN A SEAGRASS BED

open access: yesActa Biológica Colombiana, 2020
We used shore boulders that had been previously colonized, and were scattered in a seagrass bed as models for islands. We tested two predictions of Island Biogeography theory: (1) small boulders harbored fewer species than large boulders, and (2) small ...
Ana Maria del Pilar Rincon   +2 more
doaj   +1 more source

Galactic Extinction from Colors and Counts of Field Galaxies in WFPC2 Frames: An Application to GRB 970228

open access: yes, 1998
We develop the ``simulated extinction method'' to measure average foreground Galactic extinction from field galaxy number-counts and colors. The method comprises simulating extinction in suitable reference fields by changing the isophotal detection limit.
Andrew S. Fruchter   +10 more
core   +1 more source

A Vertically‐Stacked Optoelectronic Sensor for Localized Hemodynamics Monitoring

open access: yesAdvanced Functional Materials, EarlyView.
This work introduces a hemodynamics monitoring sensor that features vertically stacked microLEDs and a heterogeneously integrated photodetector. The vertically stacked microLEDs enable localized measurements, and by designing the interoptode distance according to the depth of the target region, this vertically stacked optoelectronic sensor is ...
Taeyeon Lee   +9 more
wiley   +1 more source

Activation of dopamine receptors in the nucleus accumbens promotes sucrose-reinforced cued approach behavior

open access: yesFrontiers in Behavioral Neuroscience, 2016
Dopamine receptor activation in the nucleus accumbens (NAc) promotes vigorous environmentally-cued food-seeking in hungry rats. Rats fed ad libitum, however, respond to fewer food-predictive cues, particularly when the value of food reward is low.
Saleem M. Nicola   +3 more
doaj   +1 more source

Mass Extinction in a Simple Mathematical Biological Model [PDF]

open access: yesarXiv, 1997
Introducing the effect of extinction into the so-called replicator equations in mathematical biology, we construct a general model of ecosystems. The present model shows mass extinction by its own extinction dynamics when the system initially has a large number of species ( diversity).
arxiv  

Extinction curve template for intrinsically reddened quasars

open access: yes, 2015
We analyze the near-infrared to UV data of 16 quasars with redshifts ranging from 0.71 $
Fynbo, Johan P. U.   +8 more
core   +1 more source

High‐Performance Field‐Effect Transistors and Phototransistors Array Based on Solution‐Processed Quasi‐1D Van der Waals Ta2Pd3S8 Crystals

open access: yesAdvanced Functional Materials, EarlyView.
Herein, the synthesis of Ta₂Pd₃S₈ nanowires is reported via scalable liquid cascade exfoliation and their integration into high‐mobility field‐effect transistors (FETs) and sensitive photodetectors, achieving carrier mobility of up to 27.3 cm2 V⁻¹ s⁻¹ and responsivities of 322.40 A W⁻¹ and 1.85 mA W⁻¹ for single nanowire and network devices ...
Kyung Hwan Choi   +13 more
wiley   +1 more source

Conservation of fishes in the Elands River, Mpumalanga, South Africa: Past, present and future

open access: yesKoedoe: African Protected Area Conservation and Science, 2014
In an isolated reach, between two large natural waterfalls in the Elands River in Mpumalanga, populations of a critically endangered Kneria sp., the endangered Chiloglanis bifurcus and a genetically unique population of Labeobarbus polylepis occur.
Gordon C. O’Brien   +2 more
doaj   +1 more source

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