Results 41 to 50 of about 572,463 (318)

Performance Triggered Adaptive Model Reduction for Soil Moisture Estimation in Precision Irrigation

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
ABSTRACT Accurate soil moisture information is essential for precise irrigation to enhance water use efficiency. Estimating soil moisture based on limited soil moisture sensors is especially critical for obtaining comprehensive soil moisture information when dealing with large‐scale agricultural fields.
Sarupa Debnath   +4 more
wiley   +1 more source

Occupational Safety of Different Industrial Sectors in Khartoum State, Sudan Part 2: Analysis of Occupational Accidents

open access: yesJournal of High Institute of Public Health, 2012
Background: Accident analysis is a tool which can be used to obtain accurate information about the combined accident factors that when fixed, prevent recurrence. It includes recording and documenting work-related injuries.
Fadia A El-Marakby   +4 more
doaj   +1 more source

Femtosecond Single‐ and Double‐Pulse Fabrication of Periodic Nanostructures on Stainless Steel for Surface‐Enhanced Raman Spectroscopy

open access: yesAdvanced Engineering Materials, EarlyView.
Periodic submicron features are fabricated on 304 stainless steel using single and double femtosecond laser pulses. By adjusting polarization, fluence, and inter‐pulse delay, 1D and 2D nanostructures are formed. Enhanced hydrophobicity and dense surface‐enhanced Raman spectroscopy hotspots enable analyte detection down to 10−10 M with good ...
Balaji Baskar   +3 more
wiley   +1 more source

Precolumn Derivatization High-Performance Liquid Chromatography for Determination of Perfluorocarboxylic Acids in Catalytic Degradation Solutions

open access: yesInternational Journal of Analytical Chemistry, 2022
Perfluoroalkyl carboxylic acids (PFCAs), a series of ubiquitous contaminants in the global environment, attracted much attention due to their potential for high bioaccumulation and toxicity to various organisms. There are a lot of measurement requests in
Liping Yang   +4 more
doaj   +1 more source

Marine Pollution [PDF]

open access: yesScience, 1971
In the editorial, "Marine pollution" (8 January 1971, page 21), the value given for the concentration of mercury found in tuna (paragraph 2, line 10, 0.5 x 10-6 part per billion) is incorrect. The correct value is 500 parts per billion.
openaire   +3 more sources

Mitigation of Cracks in High‐Performance Nickel‐Based Superalloys in Powder Bed Fusion Laser Beam of Metals Using a Metal Matrix Composite Approach

open access: yesAdvanced Engineering Materials, EarlyView.
High‐performance nickel‐based superalloys are often not processible in additive manufacturing (AM) due to hot cracking. The findings in this manuscript propose an efficient method to mitigate cracking and enhance mechanical properties of these alloys by producing a metal matrix composite, contributing to the material and process perspective of the AM ...
Klaus Büßenschütt   +3 more
wiley   +1 more source

Water Pollution

open access: yes, 2022
Water pollution is the contamination of water, Likes rivers, Lakes, Etc. Usually, as a result of human activities, it negatively affects its legitimate uses. Water is the great blessing of Allah; no one can withstand without water. Everybody needs water for their survival of life. It is estimated that 70% of humans rely on water.
openaire   +3 more sources

Ag Cluster‐Modified K0.5Na0.5NbO3 Piezocatalyst for Enhanced Electrochemical Dinitrogen Reduction Reaction

open access: yesAdvanced Engineering Materials, EarlyView.
Ag cluster‐modified K0.5Na0.5NbO3 acts as an efficient piezocatalyst for electrochemical N2 reduction, enhanced by built‐in electric fields under mechanical actuation. Comparative studies between static and actuated electrodes reveal improved performance under dynamic conditions.
Benedict Witulski   +7 more
wiley   +1 more source

The Effects of Ozone on Visual Attraction Traits of Erodium paularense (Geraniaceae) Flowers: Modelled Perception by Insect Pollinators

open access: yesPlants, 2021
Ozone (O3) effects on the visual attraction traits (color, perception and area) of petals are described for Erodium paularense, an endangered plant species.
Samuel Prieto-Benítez   +3 more
doaj   +1 more source

Pollution lumineuse, pollution insidieuse

open access: yesBulletin de l'Académie Nationale de Médecine, 2020
RESUME Contrairement aux autres sources de pollution, l’agression lumineuse par les nouvelles sources de lumiere artificielle sont moins souvent denoncees. Et cependant, la retine y est constamment exposee. A tout le moins une photo-protection par des verres filtrant les rayonnements nocifs pour la retine pourrait etre a recommander, tout ...
Dominique Chauvaud   +3 more
openaire   +3 more sources

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