Results 71 to 80 of about 6,072,571 (291)

A Statistical Algorithm for Estimating Chlorophyll Concentration in the New Caledonian Lagoon

open access: yesRemote Sensing, 2016
Spatial and temporal dynamics of phytoplankton biomass and water turbidity can provide crucial information about the function, health and vulnerability of lagoon ecosystems (coral reefs, sea grasses, etc.). A statistical algorithm is proposed to estimate
Guillaume Wattelez   +5 more
doaj   +1 more source

Inversion of inherent optical properties in optically complex waters using sentinel-3A/OLCI images: A case study using China\u27s three largest freshwater lakes [PDF]

open access: yes, 2019
Inherent optical properties (IOPs) play an important role in underwater light field, and are difficult to estimate accurately using satellite data in optically complex waters.
Duan, Hongtao   +5 more
core   +1 more source

Characterization of the key membrane protein cytochrome Cyc2 from Ghiorsea bivora

open access: yesFEBS Open Bio, EarlyView.
This study reports the first detailed biochemical analysis of Cyc2TAG1_1, a cytochrome protein involved in microbial iron oxidation. We produced and purified this enzyme in E. coli, then measured its iron‐oxidizing efficiency, and characterized its electrical and structural properties.
Josiane Azizi   +6 more
wiley   +1 more source

An Optical Reporting Patch for Spatiotemporal Measurements of Water Activity in Complex Environments

open access: yesAnalytical Chemistry
Water activity, aw, is an important state parameter in a wide variety of natural and technological contexts. Existing tools to measure water activity in situ and with spatial and temporal resolutions are limited. Here, we present the development of a composite silicone patch, AquaSheet, that reports water activity as a fluorescence signal.
I-Feng Wu   +6 more
openaire   +2 more sources

Remote Sensing of Optically Complex Waters - The Multivariate Approach

open access: yes, 2005
Optically complex waters, often referred to as case-2 waters, are characterised by the fact that several optically active constituents are present in the water body where the individual concentrations may vary independently of each other. In addition the
Neumann, Andreas, Krawczyk, Harald
core  

Parameterization of light absorption by components of seawater in optically complex coastal waters of the Crimea Peninsula (Black Sea)

open access: yes, 2009
International audienceThe absorption of sunlight by oceanic constituents significantly contributes to the spectral distribution of the water-leaving radiance.
Khomenko, Georges   +5 more
core   +1 more source

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

open access: yesAdvanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios   +5 more
wiley   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth   +6 more
wiley   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

Assessment of primary production in optically complex waters: Towards a generalized bio-optical modelling approach

open access: yesPLOS Water
Primary production is the most fundamental ecological process in surface waters. Bio-optical models allow for the estimation of aquatic primary production from optical remote sensing data, providing a cost-effective alternative to incubation measurements.
Jonas Wydler   +4 more
openaire   +2 more sources

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