Coating - Science topic

In this paper, we propose a new technique to fabricate long period gratings (LPGs) by mechanically applying a force to an optical fiber enclosed in a low-cost periodic 3-D printed polymeric structure. We have developed novel interdigitated grating design and studied different periods, acquiring transmission spectra over a wavelength range of 1300–1...

Becoming Bird is a journey through three artworks: The Language of the Birds (2018) by Genie Poretzky-Lee, Dawn Chorus (2007) by Marcus Coates and the recently completed video Becoming Bird 1: Spring (Walker 2022). The intention is to track the intra and inter-relational space communicated between humans and animals, in this instance birds. I am in...

We have investigated suitability of creating four new solid organic semiconductorphotocathodes for use in photosensitive gaseous detectors. A thin layer of material was deposited by using vacuum evaporation technique through auto 306 coating system. Quantum efficiency QE was measured in photo-spectral sensitivity region between 190-250nm.The encour...

The application of magnesium alloys in the 3C industry requires the coexistence of excellent corrosion resistance and good electrical conductivity. In this work, a conductive and corrosion-resistant phosphate conversion coating (PCC) on AZ91D magnesium alloy was investigated. The effects of strong oxidant (KMnO4), additive (Na2MoO4), surface-active...

Results from micrometeorological studies within hollow structures of herbaceous plants

O setor da construção civil é um dos maiores consumidores de recursos naturais. Enquanto isso, o arranjo produtivo local (APL) do agreste pernambucano é o segundo maior polo têxtil do Brasil, atuando na produção, confecção e comercialização de peças. As lavanderias geram resíduos como o lodo têxtil, caracterizado por sua propriedade semissólida, co...

Cardiac implantable electronic device (CIED) infection, despite significant developments in medicine, is still a significant source of morbidity and mortality, occurring in the range of 1% to 4% of all implantation cases. A modern approach to reducing the risk of CIED infection is the use of an absorbable antibacterial coating, also known as an env...

In order to eliminate or slow down the corrosion of various marine facilities, it has become a necessary choice to develop and use effective antifouling coatings for the development of marine equipment. This paper takes the newly developed copper-free, self-polishing, antifouling coating (CSAFC) as its research object, studies the performance chang...

We demonstrate integrated on-chip erbium-doped tellurite (TeO2:Er³⁺) waveguide lasers fabricated on a wafer-scale silicon nitride platform. A 0.352-µm-thick TeO2:Er³⁺ coating was deposited as an active medium on 0.2-µm-thick, 1.2- and 1.6-µm-wide, and 22-mm-long silicon nitride waveguides with sidewall-patterned asymmetrical distributed Bragg refle...

Multilayer dielectric gratings (MLDGs) are crucial for pulse compression in 26 picosecond-petawatt laser systems. Bulged nodular defects, embedded in coating stacks 27 during multilayer deposition, influence the lithographic process and performance of the final 28 https://doi.org/10.1017/hpl.2023.74 Published online by Cambridge University Press Ac...

In this work, sandwich structures were manufactured using a lightweight core made of expanded perlite (EP) and expanded polystyrene (EPS). The Formica sheet was chosen as the skin of the sandwich structures because of its low cost, availability, eye-catching texture, water-resistant coating, etc. The lightweight core samples were prepared using epo...

This study investigates the impact of various experimental parameters on the reflective photoelastic coating technique used to measure the stress and strain in model soil particles. The focus is directed towards three pivotal parameters: the choice of adhesive for the photoelastic coating, the inherent properties of the light source, and the config...

A MnO@N-doped carbon (MnO@N-C) composite, with a three-dimensional (3D) ground-moss-like structure, was synthesized through hydrothermal treatment, polydopamine coating, and calcination, all without the use of surfactants. In lithium-ion batteries, the MnO@N-C sample, when used as an anode, achieved a performance of 563 mAh g−1 at 1.0 A g−1 across...

To counteract possible corrosion, steel pipes are coated with a protective layer of zinc with a thickness of 20 to 85 microns, depending on the requirements of regulatory documentation. It is proven that hot-deposited zinc can effectively protect steel surfaces for 20 to 120 years. However, in centralized hot water supply (CHWS) systems, the period...

In the service life of traffic markings, the visibility of the markings can be significantly impacted due to continuous rolling by vehicles. This study aims to investigate the change of retroreflective coefficient of traffic markings at different positions on the road after being rolled by vehicles. A two-month follow-up study was conducted on a sp...

The structural evolution of Cr-coated Zr-4 after irradiation was studied via in situ TEM in the temperature range from room temperature to 1000 °C. The results show that the krypton bubbles appeared at ~700 °C, and their size increased with increasing temperatures. The grain size and shape of the irradiated Zr-4 substrate changed with increasing te...

The model analyzed in this paper has its origins in the description of composites made by a hosting medium containing a periodic array of inclusions coated by a thin layer consisting of sublayers of two different materials. This two-phase coating material is such that the external part has a low diffusivity in the orthogonal direction, while the in...

No Brasil, as estatísticas indicam que mais da metade dos trechos pavimentados possuem problemas no pavimento, aumentando o custo operacional do transporte e favorecendo a ocorrência de acidentes. O método de dimensionamento empírico do Departamento Nacional de Infraestrutura de Transportes (DNIT) é largamente utilizado para implantação de paviment...

In the Etymological Dictionary of Akkadian, recently published, the noun pampallu ‘a garment or a woollen cloth’ is accompanied by a short note: “Of interest is a Phrygian word for a ‘coat’ (and the genitals) transmitted by Hesychios: βάμβαλον· ἱμάτιον· καὶ τὸ αἰδοῖον. Φρύγες”. The paper presents some other relevant data, especially Aristophanes’ f...

Degradation of industrial machinery through wear can be mitigated with the deposition of protective coatings to reduce maintenance costs and prolong their service lifespans. Electroless nickel-based composite coatings is one possible method used to provide this protection. The addition of Tribaloy (CoMoCrSi alloy) particles has been found to produc...

Objetivo: Identificar, a partir de publicações científicas, a utilização do Laser de Baixa Intensidade para o tratamento de úlcera. Métodos: Revisão integrativa com levantamento bibliográfico nas bases de dados Medline, LILACS, BDEnf e SciELO, entre 2011 e 2021, utilizando os descritores Low Level Light Therapy, Pressure Ulcer. Foram incluídos arti...

As estradas com revestimento primário são fundamentais no escoamento da produção rural e no acesso das comunidades rurais aos centros urbanos, possibilitando assim uma vida de melhor qualidade econômica e social para essa parcela da população. Um dos maiores problemas encontrados nesse tipo de estradas é o afundamento das trilhas de rodas, que são...

To reduce the complexity of the sensor structure and improve the sensitivity of refractive index (RI) measurement, a D-shaped photonic crystal fiber (PCF) surface plasmon resonance (SPR) RI sensor with incomplete coating of gold-tantalum pentoxide (Au-Ta2O5) on the surface is proposed. When the coating width is 3.1μm, the sensor can detect RI sampl...

This paper presents the results of a test of epoxy anticorrosion coating repair. Two strategies of coating repair were studied, respectively: partial repair and integral repair. The gloss loss rate, color difference and rust area rate of the repair coating were measured. The anticorrosion performance of repair coatings under different repair method...

The study discusses the catalyst loading position of diesel particulate filter (DPF) and the effect of catalyst loading on the pressure drop. A PM oxidation catalyst is used in the regeneration process to reduce the temperature of the regeneration process. The catalyst is made of expensive precious metals, etc. The amount of catalyst used needs to...

SCIL and F-Type represent two distinct sputtering technologies applicable with PLATIT Pi411 PLUS coating equipment. Common base for SCIL and F-Type is the central rotating cylindrical cathode with very efficient target cooling. Whereas in the case of SCIL the magnetic field design corresponds to more or less conventional cylindrical arrangement, F-...

We investigate theoretically the Josephson current through one semiconductor quantum dot (QD) coupled to triple nanowires (junctions) with Majorana bound states (MBSs) prepared at their ends. We find that not only the strength but also the period of the Josephson current flowing between the left and right Josephson junctions via the dot can be full...

In recent years, trimarans have been used in high-speed transport and in warships, but studies of them have made little progress. We designed a trimaran model and used it to perform a water-entry experiment to find a way to reduce the slamming pressure. The process of the model entering the water was divided into several steps, and different theore...

UV-curable coatings possess numerous advantages, including high production rate, low environmental impact, and customizability, making them highly appealing for a wide range of applications. However, one of the greatest challenges in UV-curable coating is achieving an optimal low-gloss surface by adding matting agents to the coating formulation. Th...

This study examines the effect of two self-developed novel fireproof coatings on the fire resistance of carbon fiber-reinforced polymer (CFRP) composite sheets. The post-fire flexural properties were chosen as important indicators of fire resistance. This research involves two distinct fire conditions, the standard fire condition and the large-spac...

It is well known that coating spalling often occurs between the top ceramic coating (TC) and the metal bonding coating (BC) during the working process where the thermal mismatch stress between the layers plays a key role. Dynamic changes in the thermally grown oxide (TGO) between the facing and bonding layers during thermal cycling increase the the...

Introducción: Los quistes mesentéricos se pueden encontrar a lo largo de todo el mesenterio del intestino.Los pseudoquistes de mesenterio se caracterizan por carecer de revestimiento endotelial.Generalmente son asintomáticos y el diagnóstico se realiza mediante estudios de imagen.Material y método: Reporte de un caso clínicoResultados: Presentamos...

Nanoparticles (NPs) disguised in the cell membrane are a new type of biomimetic platform. Due to their ability to simulate the unique biological functions of membrane-derived cells, they have become one of the hotspots of research at home and abroad. The tumor-specific antigen antibody carried by breast cancer cell membranes can modify nanoparticle...

The pBRDF model is able to relate the properties of target materials to the polarization information of incident and reflected light, and is an important basis for obtaining polarization information of targets in space. It is an important basis for obtaining target polarization information and polarization detection of space targets. P-G model is t...

The advancement of reinforcement technologies and the enhancement of dynamic stability in subgrade silty soils contribute to sustainable civil engineering practices. To achieve these objectives, this study employs fiber polymers and inorganic curing agents to optimize the mechanical properties of subgrade silty soils. Utilizing dynamic triaxial tes...

Laser processing of hexaferrite in a micropyramid array form is utilized as an antireflection coating for THz iso-lator. • The fabricated antireflection coating allows the elimination of undesirable back reflection by at least 80%. • Antifeflecrion coating boosts forward signal transmission of isolator in the range between 0.1-0.37 THz. • The isola...

Background: Protecting the bacteria contained in probiotics against the effects of low pH is one of the key issues for the development and production of such products. In earlier research we demonstrated that the inactivation of bacteria in probiotics by low pH can be prevented by an effective enteric coating formulation of the product.

This paper presents an electromagnetic interferences study between a 500 kV overhead line and an underground pipeline. The interferences occur due to inductive and conductive coupling mechanisms, posing probable risks to personnel and equipment. The study employs a model of a complex corridor built in ATP/ATPDraw to evaluate induced voltages on the...

This paper presents an electromagnetic interferences study between a 500 kV overhead line and an underground pipeline. The interferences occur due to inductive and conductive coupling mechanisms, posing probable risks to personnel and equipment. The study employs a model of a complex corridor built in ATP/ATPDraw to evaluate induced voltages on the...

Owing to a very high surface-to-volume ratio, nanoparticles (NPs) have unique physical and chemical properties distinguishable from those of their bulk counterparts. They have become innovative constituents in the strategy of designing and developing advanced functional materials and medical materials. So far, there have been few studies on the the...

Silicon as an electrode material in the lithium-ion battery application scenario has been hindered by its significant volumetric expansion and intricate synthesis processes. In this research, we have successfully synthesized Si@C/carbon nanotubes/carbon sheets (Si@C-CNTs/CS) composites by employing a simple one-pot method along with modified magnes...

Abstract Background Blood-based DNA methylation has shown great promise as a biomarker in a wide variety of diseases. Studies of DNA methylation in blood often utilize samples which have been cryopreserved for years or even decades. Therefore, changes in DNA methylation associated with long-term cryopreservation can introduce biases or otherwise mi...

Titanium alloys are difficult to machine and have poor tribological properties. This paper investigates the lubricating performance of γ-Al2O3/ZnO hybrid nanofluids for Ti-6Al-4V. The pure and hybrid nanofluid are compared, and the effects of γ-Al2O3/ZnO ratios are studied. The results show that γ-Al2O3/ZnO hybrid nanofluids outperform pure nanoflu...

This study compared eight sublimation scanning sprays in terms of their effect on 3D scanning results, coating thickness, and sublimation time. The work used an automated spraying system to ensure the same deposition conditions for all tested materials. All experiments were performed under the same environmental conditions to exclude the influence...

A boundary-value problem was formulated for perturbation of an electrostatic field by a coated dielectric sphere made of two distinct linear anisotropic dielectric (LAD) materials. Specific affine transformations were employed to represent the electric potential inside the core and the coating in terms of the solutions of the Laplace equation. A tr...

This research is focused on enhancement of #evaporation from #porous media (PM). An #innovative technique is developed by CREST - Centre for Research and Engineering in Space Technology CREST for #evaporationrate measurement by the vapor pressure tracking. Obtained results demonstrated that #graphenecoating enhances the evaporation rate from the #p...

High-flux ferronickel powder cores are widely used in high-frequency transformers and other fields due to their high saturation flux density and low core loss. In this paper, FeNi@Al2O3 composites with varying Al2O3 contents (0.0–5.0 wt.%) were prepared. Their microstructure, magnetic properties, and power losses were investigated in detail. SEM mo...

Spin coating is a wide-spread, quick, and inexpensive method to create nanometer-thick thin films of various polymers, such as polystyrene, on top of solid substrates. Since the film thickness determines the mechanical, optical, and degradation properties of the coated film, it is essential to develop a simple method to predict thickness based on o...

Описано триєдину математичну модель електромагнетного поля підземного трубопроводу, яка базується на розв’язаннях крайових задач електродинаміки для циліндричних структур, теорії електричних кіл з розподіленими параметрами та теорії розподілу магнетного поля електричних струмів. На цій основі досліджено залежності характеристик поля від параметрів...

Piezo‐catalysis, which is possible to utilize natural mechanical energy, is an ideal technology for synthesizing hydrogen peroxide (H2O2) but is still challenging. Herein, C‐layer coated ZnO (C‐ZnO) with modulated electronic structure is constructed for piezo‐catalytic H2O2 generation. The C‐layer not only provides more active sites but also induce...

In the quest to develop endurable and long-lasting separators for lithium-ion batteries, recent studies have been focused on the development of polyolefins-based separators that provide good mechanical strength but undergo high expansion at elevated temperatures. In this research, we have developed carboxymethyl cellulose nanofiber/ceramic composit...

The quality of cotton seed is of great significance to the production of cotton in the cotton industry. In order to reduce the workload of the manual sorting of cotton seeds and improve the quality of cotton seed sorting, this paper proposed an image-detection method of cotton seed damage based on an improved YOLOv5 algorithm. Images of cotton seed...

The strength and characteristics of a coating are defined by the impact and temperature of the individual molten particles, as well as by the state of the surface to be coated. The parameters selected for thermal spraying determine the parameters of the particles in flight: temperature and velocity. These parameters can be determined by measuring t...

Academic discourse like argumentative writing is meant to build strong arguments while projecting different theories and research. In academics, writers are expected to express certainty and doubt. In this regard, a modal verb is used to reflect the speaker's perspective about anything obvious, tentative or reasonable. It improves language expressi...

In the integrated circuit industry, metal liquids are frequently in contact with chemical vapor deposited (CVD) SiC, and it is important to understand the interactions between CVD-SiC and metal droplets. In this study, the wetting behavior of Al on a highly oriented SiC surface was investigated, and the contact angle could be controlled from 6° to...

Ցույց է տրված, որ Հայաստանում գազատրանսպորտային համակարգերի խողովակա­շարերը հիմնականում տեղակայվում են համեմատաբար բարդ ռելիեֆում և աշխատում են միաժամանակյա ազդող գործոնների պայմաններում, որոնց պատճառով խողովակների կցվան­քային եռակցված կարերում առաջանում և զարգանում են կոռոզիոն-հոգնածային և զուտ կոռո­զիոն գործընթացներ: Նշված երևույթները զգալիորեն ն...

We conducted an experimental study on the vortex-induced vibration (VIV) dynamics of cylinders featuring a specific superhydrophobic band. The superhydrophobic band refers to the pattern where the cylinder's surface is featured with equispaced bands of normal surface and superhydrophobic coating in an alternate manner. The experiments were conducte...

No estado da Paraíba, Brasil, há significativa concentração do mineral vermiculita e durante seu beneficiamento, toneladas de resíduos são gerados e depositados no meio ambiente de forma inadequada, causando grandes impactos ambientais. Diante disto, esse trabalho teve como objetivo analisar a viabilidade do uso do resíduo de vermiculita em substit...