Composites - Science topic

Centre for Composites and Advanced Materials (CCAM), SRMIST, Kattankulathur is going to organize the 3rd International Conference on Recent and Advanced Composite Materials (ICRACM 2025) during February 26-28, 2025.

The energy conversion efficiency of a carbon black-phosphoric acid composite ultracapacitor was determined. A typical ultracapacitor had a maximum energy storage capacity of 24.32J. It had a specific energy of 8.11 J/g of which, during discharge, 36% was dissipated internally in the ultracapacitor, in two resistances of 2.66Ω and 54.01Ω, where the...

We discuss the possibility that the two nearby resonances observed by BESIII partially below the p p ¯ threshold might be due to mixing between two metastable states with the same J P C = 0 − + quantum numbers, but rather different internal structure. One is a p p ¯ hadronic molecule and the other a bound state of a light-quark diquark and an antid...

We propose a proximal variable smoothing algorithm for inclusion problem with a sum involving monotone composite operators. The proposed algorithm is designed as a forward-backward splitting algorithm with two steps: (i) a forward step with the gradient of a smoothed surrogate operator, designed with the Yosida approximate; (ii) the backward step w...

This study addresses enhancing the strength of metal-cutting machine tool beds made from polymer concrete by optimizing the internal cross-section design through spiral stiffeners. Key factors influencing the bed’s strength include the composite preparation technology, the mixing speed (600 - 800 rpm), and duration (3 - 4 minutes). A strong correla...

The proximal bundle algorithm (PBA) is a fundamental and computationally effective algorithm for solving optimization problems with nonsmooth components. We investigate its convergence rate, focusing on composite settings where one function is smooth and the other is piecewise linear. We interpret a sequence of null steps of the PBA as a Frank-Wolf...

University Rankings exert considerable influence in higher-education decision-making. Yet, as an artifact of their construction, rankings are largely unhelpful in conveying practical strategic insights to university administrators intent on improving their college’s rank. Machine learning tools such as interpretable machine learning (IML) and expla...

This article continues the research initiated in (Jachalski et al. in SIAP 73(3):1183–1202, 2013). We derive explicit formulae for the leading order profiles of eleven types of stationary solutions to a one-dimensional two-layer thin-film liquid model considered with an intermolecular potential depending on both layer heights. The found solutions a...

This article presents the results of a study of an electret composite polymerferropiezoceramic with high dielectric constant in order to manufacture a highcapacity and stable power source for a mini aerial vehicle on its basis.

The serious mismatch between the positive and negative electrodes of supercapacitors (SCs) makes it imperative to develop high‐performance negative electrode materials. Among them, multimetallic iron‐based oxides (MIBOs) are intensively investigated attributed to their high theoretical specific capacitance, wide operating potential window, copious...

The imperative advance towards achieving “carbon neutrality” necessitates the development of porous structures possessing dual acoustic and mechanical properties in order to mitigate energy consumption.

Many type systems have been presented in the literature for variants of the pi-calculus, but none of them are able to handle composite subjects such as those found in the language epi, which features polyadic synchronisation. The purpose of this paper is to address the question of how to type composite subjects in a general fashion. We assess the v...

When testing a number (11≤A) as to whether it is a prime or non-prime (composite) number , we apply the following rule : f(A,P)= (A-P^2)/2P Where (A) is the odd number to be tested , (P) is the prime numbers modified between 3≤P≤[√A ] . If all values of (P) do not give any integer value to the rule f(A,P) , then the number (A) is a prime number ....

We consider the composite minimization problem with the objective function being the sum of a continuously differentiable and a merely lower semicontinuous and extended-valued function. The proximal gradient method is probably the most popular solver for this class of problems. Its convergence theory typically requires that either the gradient of t...

Polymer–ceramic composite electrolytes combine beneficial properties of each phase. We review the arguments for each possible conduction mechanism, to inform improvement of the conductivity while maintaining the mechanical benefits.

Composite flat sheet membranes, functionalized with imidazolium-based ionic liquids (ILs) grafted to poly(vinyl alcohol)/glutaraldehyde as catalytic layer, were developed to enhance the esterification between n-butanol and acetic acid. The functionalized...

We produce families of two-dimensional gap solitons (GSs) maintained by moiré lattices (MLs) composed of linear and nonlinear sublattices, with the defocusing sign of the nonlinearity. Depending on the angle between the sublattices, the ML may be quasiperiodic or periodic, composed of mutually incommensurate or commensurate sublattices, respectivel...

We reported on an efficient high-power continuous-wave laser operation on the ³ H 4 → ³ H 5 transition of Tm ³⁺ ions in a diffusion-bonded composite YVO 4 /Tm:GdVO 4 crystal. Pumped by a laser diode at 794 nm, a maximum output power of 7.5 W was obtained from a YVO 4 /Tm:GdVO 4 laser at 2.29 μm, corresponding to a slope efficiency of 40.3% and exce...

Testing for mediation effect poses a challenge since the null hypothesis (i.e., the absence of mediation effects) is composite, making most existing mediation tests quite conservative and often underpowered. In this work, we propose a subsampling-based procedure to construct a test statistic whose asymptotic null distribution is pivotal and remains...

Thermoplastic composites are becoming increasingly attractive to the aerospace and automotive industries owing to their outstanding mechanical properties and cost-effective manufacturing processes [...]

Quantum nonlocality represents correlations between subsystems of a composite quantum system, usually including Bell nonlocality, steerability, and entanglement. According to the hypothesis of quantum mechanics, states of a quantum system Q described by a d-dimensional Hilbert space are denoted by density operators acting on . Under a basis e for t...

This study presents a comprehensive evaluation of FeS-W18O49 composite electrodes, revealing their exceptional performance for supercapacitor applications. Fabricated via a wet-chemical method, the FeS-W18O49 composites demonstrated a high specific capacitance...

A CaMnO3/g-C3N4 heterostructure, demonstrating promising photocatalytic performance for tetracycline (TC), was successfully synthesized using a straightforward calcination approach in this study. A series of characterization methods were employed to assess the physicochemical properties and visible-light responsiveness of the synthesized photocatal...

As an alternative to the third law of thermodynamics, there has been proposed the principle of the boundedness of energy exchange between thermodynamic systems whose composite constitutes an isolated system (Heidrich, Ann. Phys. 373, 665, 2016). In this paper it is argued that the boundedness of energy exchange is a more general principle that is n...

We study the theoretical structure of compositeness with explicit energy dependency and find a possible explanation for the difficulty in the interpretation of compositeness of deuteron. Many approaches, including the weak-binding limit, calculate the deuteron compositeness as greater than unity, regardless of its interpretation as a proportion. Th...

This research focuses on synthesizing chemically and thermally stable novel in-situ Ti4AlN3 and Ti3AlC2 MAX phase reinforced boron-based composites using hot pressed and inert sintering processes, enabling sizeable and wider...

https://authors.elsevier.com/c/1k87r_L4UnpDG3

We apply the Simple Equations Method (SEsM) for obtaining exact solutions of nonlinear differential equations. We discuss several examples with goal to illustrate the results from the use of derivatives of composite functions in the algorithm of SEsM. The discussed examples contain derivatives of functions which are composite functions of solutions...

In this study, melamine-urea-formaldehyde/nano-Al2O3 (MUF/nano-Al2O3) composite gel foams were produced by foaming with CO2 generated by CaCO3 and phosphoric acid. Nano-Al2O3 was introduced to the MUF matrix based on the optimum formulation obtained by the response surface methodology based on Box–Behnken design, and the effects of nano-Al2O3 on th...

Different types and part of fungus were added to polylactic acid (PLA), to protect it from radiation. Mechanical test shows that addition of fungus to PLA increase modulus of elasticity therefore also stiffness of PLA.

The study presents simplified approximations that allow the evaluation of the unidirectional longitudinal and transverse modulus of a composite material, starting from the elastic properties of the constituents (inorganic particles, matrices) as well as its relative properties. In calculations, the response of the composite material is assimilated...

Concrete curing is an important activity from the point of view of shaping all the properties of concrete, and the way it is carried out depends primarily on the type of binder used. The optimal care effect is a kind of soft method of positive modification. Choosing such an optimal method is not an easy task, especially if the composite contains a...

Syringocystadenoma papilliferum (SCAP) is an uncommon benign adnexal tumor, most commonly involving the head-and-neck region. It usually occurs singly or may be seen in association with other tumors. The association of tubular apocrine adenoma (TAA) with SCAP in the background of nevus sebaceous (NS) on the scalp is well documented. However, the co...

Criteria for the transtemporal identity of composite artifacts are best understood in terms of functions, histories, and the intentions their makers. As long as certain background-conditions are fulfilled, composite artifacts can undergo changes in all of their parts with no breakdown in their identities, even to the point of being unrecognizable a...

In this system, we discuss methods to stylize a scene of 3D primitive objects into a higher fidelity 3D scene using novel 3D representations like NeRFs and 3D Gaussian Splatting. Our approach leverages existing image stylization systems and image-to-3D generative models to create a pipeline that iteratively stylizes and composites 3D objects into s...

Strain Hardening Cementitious Composites), γνωστά και ως σύνθετα μηχανικά τσιμεντοειδή υλικά (Engineered Cementitious Composites). Πιο συγκεκριμένα, πραγματοποιήθηκαν πειράματα για τον προσδιορισμό της θλιπτικής και εφελκυστικής αντοχής του απλού σκυροδέματος και του SHCC που παράχθηκε. Κατά την πειραματική διαδικασία, το SHCC παρουσίασε αυξημένη θ...

The invention of hafted tools, between about 500 Ka and 250 Ka years ago, was a fundamental technological innovation that has shaped human social, cognitive, and biological capabilities. Despite the recurrent evidence of hafting observed on lithic tools, handles from this period are rare since they were probably made of perishable materials. Three...

Mersenne primes and Fermat primes may be thought of as primes of the form $\Phi_m(2)$, where $\Phi_m(x)$ is the $m$th cyclotomic polynomial. This paper discusses the more general problem of primes and composites of this form.

We study Olshanski twisted Yangian based models, known as one-dimensional “soliton non-preserving” open spin chains, by means of algebraic Bethe Ansatz. The even case, when the bulk symmetry is \mathfrak{gl}_{2n} 𝔤 𝔩 2 n and the boundary symmetry is \mathfrak{sp}_{2n} 𝔰 𝔭 2 n or \mathfrak{so}_{2n} 𝔰 𝔬 2 n , was studied in [Ann. Henri Poincaré 20, 3...

In this paper we build a joint model which can accommodate for binary, ordinal and continuous responses, by assuming that the errors of the continuous variables and the errors underlying the ordinal and binary outcomes follow a multivariate normal distribution. We employ composite likelihood methods to estimate the model parameters and use composit...

The formation of primordial black holes in the early universe may happen through the collapse of large curvature perturbations generated during a non-attractor phase of inflation or through a curvaton-like dynamics after inflation. The fact that such small-scale curvature perturbation is typically non-Gaussian leads to the renormalization of compos...

This letter presents a model based on the Cramér–Rao bound theory for calculating the theoretical lower limit of imaging resolution of microwave computational imaging aided by re‐configurable metasurface. The model takes into account two crucial parameters: the signal‐to‐noise ratio and the number of measurements in the imaging process. By simultan...

Innovation and entrepreneurship ability is a composite ability that combines practical ability, and innovation ability. In order to systematically evaluate the innovation and entrepreneurship abilities of college students, it is necessary to construct a comprehensive index system. In finance and economics colleges, students have unique abilities in...

Dampness in the joint is a common defect of power cables, and the influence of moisture on the performance of the intermediate joint is very important. The electric field distribution of the joint is analyzed by simulation, and the XLPE sample is used as an experimental object to test the breakdown voltage under different damp levels. Simulation re...