Absorption - Science topic

The experiment aimed to compare different methods of measuring the Feed pellet durability through the effect of pellet die speeds and the particle size (mill sieve holes diameter). Feed pellet durability was studied in four different ways: pellet direct measurement (%), pellet lengths (%), pellet water absorption (%), pellet durability by drop box...

A carbon/copper-coated optical fiber was exposed to hydrothermal environments. Hydrogen penetration occurred at the initial stage of exposure and resulted in the formation of an OH-related absorption peak in the optical loss spectrum.

ZnxIn2S3+x has emerged as a promising candidate for alcohol photoreforming based on C-H activation and C-C coupling. However, the underlying structure-activity-selectivity relationships remain unclear. Here we report on ZnxIn2S3+x with varying Zn:In:S ratios for visible-light-driven furfuryl alcohol reforming into H2 and hydrofuroin, a jet fuel pre...

Consistency limits are the basic parameters used as standard inputs for any soil investigation program to evaluate the geotechnical properties of fine-grained soils. The primary objective of this study is to investigate the variations in the undrained shear strength of clays with different plasticity properties based on the fine content, clay miner...

Solid oxide fuel cells operate at high temperatures and provide better system performances when integrated with gas turbine plants, which makes them an ideal option to operate in hybrid systems. The purpose of this research is to propose two novel integrated multigeneration systems by combining solid oxide fuel cell plant, carbon dioxide recompress...

In this study, we present a chiral metasurface structure based on graphene-Au elliptical hole arrays. Circular dichroism of up to 0.91 is achieved by varying the rotation angle of the elliptical hole. Circular dichroism (CD) typically expresses the chiral response. The structure has excellent absorption of right circularly polarized light while ref...

Grid-forming converters, which provide frequency and voltage support to the grid, have been identified as an enabling technology in modern power systems. However, the unstable operation of grid-forming converters under large disturbances poses a significant challenge. To address the challenge, this article presents an in-depth analysis of the trans...

In the last century, an increasing number of extreme weather events have been experienced across the globe. These events have also been linked to changes in water quality, especially due to heavy rains, flooding, or droughts. In terms of blue economic activities, harmful algal bloom events can pose a major threat, especially when they become widesp...

The experiment about Pre-eliminary test for improve the pore system of the granular activated carbon (coal-based or charcoal) / GAC with the size of approx. 2 mm. The increase of pore system can be achived by KOH as chemical activation agent (Regmi, et al. 2012, Sun, et al. 2015, J. Duran-Valle, et al. 2017; Wazir, et al. 2020; and Kiani et al. 202...

Plasma ignition is critical in various scientific and industrial applications, demanding an efficient and robust execution mechanism. In this work, we present an innovative approach to plasma ignition by incorporating an analysis of fundamental aspects of light scattering in the complex frequency plane. We demonstrate the high-power virtual perfect...

There is a pressing demand to design simple absorber structures that support optimal absorption in multi-band to meet different applications. In this work, a novel quad-band infrared perfect metamaterial absorber (QPMA) is proposed and numerically investigated. The structure of the QPMA is composed of coaxial multi-layer dielectric (SiO2) disks of...

Time-resolved X-ray magnetic circular dichroism under the effects of ferromagnetic resonance (FMR), known as X-ray ferromagnetic resonance (XFMR) measurements, enables direct detection of precession dynamics of magnetic moment. Here we demonstrated XFMR measurements and Bayesian analyses as a quantitative probe for the precession of spin and orbita...

An easy, simple and accurate method for estimating ciprofloxacin in the presence of cephalexin or vice versa in a mixture of the two. It has been possible to successfully apply the proposed method H-point standard addition method (H-PSAM) in the estimation of ciprofloxacin in the presence of cephalexin interfering at wavelengths 240-272.3 nm and wi...

Due to the high impact of the building sector on the environment, a growing interest focuses on insulating materials able to ensure good thermo-acoustic performance for the building envelope from a sustainable and circular economy perspective. In this context, Moroccan natural gypsum was mixed with local natural waste materials. The thermal and aco...

We report on the use of quartz-enhanced photoacoustic spectroscopy (QEPAS) for multi-gas detection. Photoacoustic (PA) spectra of mixtures of water (H2O), ammonia (NH3), and methane (CH4) were measured in the mid-infrared (MIR) wavelength range using a mid-infrared (MIR) optical parametric oscillator (OPO) light source. Highly overlapping absorptio...

In this paper, a novel thin-walled double-hexagonal crash box is first proposed and then multi-objective robust optimized for better overall crashworthiness under multi-angle impact loading, using a proposed hybrid method combining aluminum foam-filling and Taguchi-grey relational analysis (GRA). Specifically, the finite element (FE) models of the...

Poster presented at the EMRS 2023 Fall meeting in Warsaw. To improve the photocatalytic activity of TiO₂, a stable and available catalyst, the optical absorption edge can be moved to longer wavelengths, or improve photoinduced charge carrier separation. Introducing additional materials to TiO₂ can do both. Notably, the added material should be a...

This paper proposes a switchable polarization-insensitive frequency selective rasorber (FSR) within the X-band. The FSR comprises a lossy layer, a lossless layer, and an intermediate air layer. The lossy layer consists of metal patches, folded wires, and lumped resistors, while the lossless layer is formed with square and cross patches loaded with...

Absorption spectra of the ITO nanocrystalline film annealed at 150 °as a function of the annealing time. The four-point probe technique to measure the resistance of the ITO nanocrystalline film. Absorption spectra of the ITO nanocrystalline films, annealed for 30 min, as a function of the annealing temperature. Absorption spectra of the ITO nanocry...

This short note provides explicit solutions to the linearized Boussinesq equations around the stably stratified Couette flow posed on T×R. We consider the long-time behavior of such solutions and prove inviscid damping of the perturbed density and velocity field for any positive Richardson number, with optimal rates. The explicit solution is obtain...

We have developed a sensor for the temperature measurement in the test section after the combustion chamber of an aero engine model by using direct absorption spectroscopy. Five distributed feedback diode lasers at near 1392, 1393, 1339, 1343, and 1469 nm are utilized as the light sources to detect H2O absorptions to improve the precision of temper...

A compact and novel ultrawideband (UWB) antenna integrated with Ku band for microwave imaging applications is reported. The reported antenna consists of a novel patch structure along with a tapered feed structure on top of FR‐4 substrate having a compact dimension of 16 × 22 mm² and novel semicircular defected ground structure (SC‐DGS) etched below...

We consider the long-time behavior of solutions to the two dimensional non-homogeneous Euler equations under the Boussinesq approximation posed on a periodic channel. We study the linearized system near a linearly stratified Couette flow and prove inviscid damping of the perturbed density and velocity field for any positive Richardson number, with...

In this work, using Density Functional Theory (DFT) and Time Dependent DFT, the absorption spectrum, the optical gap, and the binding energy of scandium pnictogen family nanoparticles (NPs) are examined. The calculated structures are created from an initial cubic-like building block of the form Sc4Y4, where Y = N, P, As after elongation along one a...

Bio-composites have become increasingly popular as a substitute for synthetic fibers over the last decade due to their eco-friendly nature. To utilize them effectively in engineering applications, particularly in the automotive industry, a thorough understanding of the material properties is necessary. This experimental investigation focuses on exp...

Broadband spectral photoresponse has shown bright prospects for various optoelectronic devices, while fulfilling high photoactivity beyond the material bandgap is a great challenge. Here, we present a molecular pyroelectric, N-isopropylbenzylaminium trifluoroacetate (N-IBATFA), of which the broadband photo-pyroelectric effects allow for self-driven...

The activity and stability of platinum electrode toward oxygen reduction reaction are size-dependent. Although small nanoparticles have high Pt utilization, the under-coordinated Pt sites on their surface are assumed to have too strong oxygen binding strength, thus often leading to compromised activity and surface instability. Herein, we report an...

The article presents the results of research on the effect of sprinkling on the structural and aggregate composition of soil and its density. The high quality of sprinkling irrigation is achieved with uniform distribution of rain over the area, acceptable intensity with drop diameter and impact force, at which plants and soil structure are not dama...

Modeling of layered acoustic structures to predict the sound absorption characteristics of complex materials is a widely used method in room acoustic practice. Commonly used modeling techniques-such as the transfer matrix method-typically assume locally reacting surfaces of infinite lateral dimensions and provide one-dimensional calculations only,...

Background: For health professionals, gamification is a new teaching method that has achieved an important role in recent years, with excellent results in learning and knowledge acquisition. Thus, the objective of this study was to analyze the gaming experience through different gamification resources in the classroom with physiotherapy students....

Flake-shaped FeSiCr (FFSC) material is expected to be a promising microwave absorbent due to its excellent magnetic properties and environmental resistance. By introducing carbon-based materials through suitable coatings, the electromagnetic parameters and energy loss can be tuned to improve the performance of FFSC. A facile solution-blending metho...

The measurement of surface impedance and the absorp-tion/transmission characteristics is well-established for acoustic materials that can be considered locally reac-tive: Impedance tube-based and in-situ measurement techniques are codified in multiple ISO standards, e.g. ISO 354 and ISO 10534. However, as lateral wave propagation in the material un...

Diagnostic objective The FSS is used to measure the flow state and can be used in different contexts such as computer games or in experimental settings (e.g. a post-basket exercise) and under everyday conditions (work, learning situation, sports, leisure time). Structure The FSS consists of a total of 16 items. Items 1-13 constitute the three facto...

المُستخلص: تناولت الدراسة تقيـيم خصائص المـياه الجوفـية للإرواء الزراعي، لـ 23 بئر في منطقة سبع قصور شمال شرق بغداد والتي تبلغ مساحتها (13.35 كم2)، وعدد سكانها اكثر من ثمانون الف نسمة، من خلال استخدام ثمانية تصانيف، وفق المواصفات العالمية توجد سبعة اربعة ابار فقط صالحة للري ما تُمثل نسبة (30%) فقط من آبار منطقة الدراسة، في حين نسبة امتصاص الصوديوم...

In this work, we will study the transmission probability of Dirac fermions through a double laser barrier. As part of the Floquet approximation, we will determine the spinors in the five regions. Due to the continuity of the wave function at the barrier edges, we find eight equations, each with infinity modes. To simplify, we use the matrix formali...

In this second of a two-paper series, we present a detailed analysis of three Hubble Space Telescope observations taken ∼2–4 yr post-discovery, examining the evolution of a UV-bright underlying source at the precise position of AT 2018cow. While observations at ∼2–3 yr post-discovery revealed an exceptionally blue ( L ν ∝ ν 1.99 ) underlying source...

Cylindrical structure is a kind of common protective structure, its internal support is generally homogeneous or rigid, energy absorption buffer ring can effectively improve its impact resistance. In this paper, a comparative study of the impact resistance of cylindrical structures with composite cushioning energy absorption rings under double impa...

In this paper, for the first time, an erbium-doped fluoroindate fiber laser emitting up to 3.91 μm is designed and optimized by means of a numerical investigation performed via a home-made computer code. It is cladding pumped with red light at 635 nm. The employed fiber is commercially available from Le Verre Fluoré and exhibits a double D-shaped g...

An improved star-shaped honeycomb (ISSH) is a kind of honeycomb structure with excellent performance. The main objective of this study was to provide some ideas for the optimization of the ISSH structure in ships. As a result, 2D-ISSH specimens were fabricated using 3D printing technology, and a quasistatic compression test was carried out to inves...

Light-matter interactions of defects in two-dimensional materials are expected to be profoundly impacted by strong coupling to phonons. In this work, we combine ab initio calculations of a defect in hBN with a fully quantum mechanical and numerically exact description of a cavity-defect system to elucidate this impact. We show that, even at weak li...

The article analyzes the infrared spectra (IR spectra) of detonation nanodiamonds (DND) obtained from various explosives: from an alloy of TNT and RDX; tetryl; tetryl with RDX and a ternary mixture: a mixture of TNT, RDX and tetryl. The resulting DNDs were treated: with aqueous ammonia at 220 °C at 40 atm, in a gaseous medium (air and argon) at 430...

This study systematically investigates the mechanical properties of polyurea-coated auxetic honeycomb sandwich panels under explosive load. First, the dynamic deformation process, deformation/destruction modes, maximum deflection, and energy absorption capacity of structures with different coating methods are studied and compared with uncoated stru...

BiVO 4 is one of the most promising photoanode materials for photoelectrochemical (PEC) solar energy conversion, but it still suffers from poor photocurrent density due to insufficient light‐harvesting efficiency (LHE), weak photogenerated charge separation efficiency ( Φ Sep ), and low water oxidation efficiency ( Φ OX ). Herein, we tackle these c...

In this study we assessed the efficacy of manufacturing lightweight particleboards using sunflower (Helianthus annuus L.) stalk particles. Three-layer lightweight particleboards with target densities of 350, 450 and 550 kg/m3 were produced with different proportions of wood-to-sunflower stalk particles (100:0%, 75:25%, 50:50%, 25:75%, 0:100%) in th...

In highly out-of-equilibrium states of matter, such as those induced by a pump laser, the applicability of well-established spectroscopic probes of magnetic order are called into question. Here we address the validity of x-ray absorption techniques in pump laser conditions, focusing on magnetic linear dichroism (MLD), a crucial probe of antiferroma...

Fumed silica was functionalized by piperazine followed by the reaction with 2- naphthalenesulfonyl chloride to prepare Fumed-Si-Pr-Piperazine-Naphthalenesulfonyl chloride (Fumed-Si-Pr-PNS), which was characterized to demonstrate the effective attachment on the surface of fumed silica. The optical sensing ability of Fumed-Si-Pr-PNS was studied via d...

Selective laser etching is a promising candidate for the mass production of glass interposers. It comprises two steps: local modification by an ultrashort-pulsed laser and chemical etching of the modified volume. According to previous studies, when an ultrashort-pulsed laser beam is irradiated on the sample, electron excitation occurs, followed by...

We have fabricated planar interdigitated photodetectors exhibiting high responsivity. These detectors are based on thin layers of methylammonium lead bromide (MAPbBr3) at 90 nm thickness. MAPbBr3 thin films were first characterized on glass (borosilicate) substrates using absorption and photoluminescence measurements showing a high absorption edge...

The properties of photokinetics under monochromatic light have not yet been fully described in the literature. In addition, for the last 120 years or so, explicit, handy model equations that can map out the kinetic behaviour of photoreactions have been lacking. These gaps in the knowledge are addressed in the present paper. Several general features...

The effect of high contrast on the multiscale behaviour of elastic laminates is studied. Mathematical modelling in this area is of significant interest for a variety of modern applications, including but not limited to advanced sandwich structures and photovoltaic panels. As an example, the antiplane shear of a symmetric, three-layered plate is con...

porous silicon-based photodetectors have attracted more researches due to their high luminous efficiency, good stability and low cost. In this paper, a PbS quantum dots/porous silicon hybrid structure has been fabricated. The PbS quantum dots (QDs) partly infiltrated into the porous silicon (PSi) layer and partly deposited on its surface, which cou...

O arroz possui importância social, econômica e nutricional em diferentes países. Em sua forma integral o seu consumo confere mais benefícios a saúde. No entanto, devido às suas características de maior dureza e tempo de cocção prolongado, apresenta baixa aceitação entre os consumidores. O objetivo com este estudo foi analisar, por meio de uma revis...

Copyright@ : Nurhan Kishali | Biomed J Sci & Tech Res | BJSTR. MS.ID.007775. 40463 ARTICLE INFO ABSTRACT A new and convenient synthesis for pyrrolidine derivatives has been developed starting from 3a,4,7,7a-tetrahydroisobenzofuran-1,3-dione. 3a,4,7,7a-tetrahydroisobenzo furan-1,3-dione was reacted with amines to give N-ethyl and N-phenyl isoindole...

This work presents numerical solutions to Maxwell's equation (nonlinear Schrödinger equation) in a chiral Kerr medium with M-photon absorption. The nonlinear chirality is described through formalism, which arises from the effect of a strong electric field on the magnetization vector. This paper allows us to study the nonlinear effects of chirality...

The interactions between charges and excitons involve complex many-body interactions at high densities. The exciton-polaron model has been adopted to understand the Fermi sea screening of charged excitons in monolayer transition metal dichalcogenides. The results provide good agreement with absorption measurements, which are dominated by dilute bri...

The flux growth of InVO4 bulk single crystals has been explored for the first time. The reported eutectic composition at a ratio of V2O5:InVO4 = 1:1 could not be used as a self-flux, since no sign of melting was observed up to 1100 °C. Crystals of InVO4 of typical size 0.5×1×7 mm3 were obtained using copper pyrovanadate (Cu2V2O7) as a flux, using P...

Water vapor absorption into a multi-layer simulated corrugated board structure was investigated using magnetic resonance imaging (MRI). Humidity and other ambient conditions considerably affect the strength and durability of corrugated board, and through creep, collapse of the corrugated board structures at unexpectedly low load levels. Currently,...

Cadmium sulfide nanoparticles size effects on the superconducting properties of YBa2Cu3Oy compound were investigated in details. Solid-state reaction method was used for the synthesis of samples with additional amounts of CdS nanoparticles with sizes 6 nm and 12 nm and an additional amount x = 0.1 wt%. Synthesis of cadmium nanoparticles was done by...

During an evacuation, the tsunami lifeboat should be able to withstand the possible external loads that might be occurred, such as collisions, violent crashes, and capsizing events. Special structural reinforcement and improvement, such as a crash absorber, are attached to prevent damage due to the impact load. Therefore, this article focuses on th...

This paper presents the development of a portable device that can be used for liquid identification using the concept of Beer−Lambert law. The final device can recognize up to 30 different materials in their liquid state and provides some other useful features that can enhance its operation. The user can set a group of 30 liquids according to speci...

Call for papers to the Special Issue " New Trends in Distillation and Absorption Technology" Processes Journal *Special Issue Link* https://www.mdpi.com/journal/processes/special_issues/57W6480GE8

Graphene aerogels (GAs) possess a remarkable capability to absorb electromagnetic waves (EMWs) due to their favorable dielectric characteristics and unique porous structure. Nevertheless, the introduction of nitrogen atoms into graphene aerogels can result in improved impedance matching. In recent years, nitrogen-doped graphene aerogels (NGAs) have...

In this paper, wideband, and ultrathin metamaterial absorber is proposed, analyzed and fabricated for Ku-band applications. The reported absorber has a nearly perfect absorptivity above 90% covering the entire Ku band (12–20 GHz) at normal incidence for both transverse electric and transverse magnetic polarization. This is due to the supported elec...

Nanoplastics (plastic particles smaller than 1 μm) are the least-known type of marine litter. Nanoplastics (NPs) have attracted much interest in recent years because of their prevalence in the environment and the potential harm they can cause to living organisms. This article focuses on understanding NPs and their fate in the marine environment. So...

We study gas and metal outflow from massive galaxies in protocluster regions at $z=3-9$ by using the results of the FOREVER22 simulation project. Our simulations contain massive haloes with $M_{\rm h} \gtrsim 10^{13}~\rm M_{\odot}$, showing high star formation rates of $> 100~\rm M_{\odot}~yr^{-1}$ and hosting supermassive black holes with $M_{\rm...