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View article: High Temperature Isothermal Oxidation at 950°C of Ni-based Fe-40Ni-24Cr Alloy
High Temperature Isothermal Oxidation at 950°C of Ni-based Fe-40Ni-24Cr Alloy Open
The effect of different heat treatment temperatures on the isothermal oxidation of Ni-based Fe-40Ni-24Cr alloy was studied. The alloy underwent a heat treatment process at 1000°C and 1200°C for 3 hours of soaking time, followed by water qu…
View article: Effect of Heat Treatment Temperature on Isothermal Oxidation of Ni-based Fe-33Ni-19Cr Alloy
Effect of Heat Treatment Temperature on Isothermal Oxidation of Ni-based Fe-33Ni-19Cr Alloy Open
This project studies the influence of different grain sizes of Ni-based Fe-33Ni-19Cr alloy obtained from heat treatment procedure on high temperature isothermal oxidation. Heat treatment procedure was carried out at two different temperatu…
View article: Effects of Different Fiber Sizes in PLA/Carbon Fiber Composites on Mechanical Properties
Effects of Different Fiber Sizes in PLA/Carbon Fiber Composites on Mechanical Properties Open
This study assessed the morphology and chemical composition of coir coconut husk carbon fiber, as well as the impact of fiber diameters on the physical and mechanical properties of polylactic acid composites. Researchers are studying polyl…
View article: Effect of Acoustic Waves Caused by Bells on a Stained-Glass Window
Effect of Acoustic Waves Caused by Bells on a Stained-Glass Window Open
The paper presents the influence of acoustic waves caused by bells on a stained-glass window and its components. The issue is particularly important in the context of church towers with bells and stained-glass windows. The free vibrations …
View article: Using Optimization Algorithms to Design Phononic Barriers Protecting Monuments or Building Facades
Using Optimization Algorithms to Design Phononic Barriers Protecting Monuments or Building Facades Open
The work compares the design of phononic structures using two types of optimization algorithms. Using the genetic algorithm and the simulated annealing algorithm, optimal layer distributions were obtained in which the phononic band gap phe…
View article: The Effect of Recycled High-Density Polyethylene (HDPE) as an Additional Binder in Porous Asphalt Pavement
The Effect of Recycled High-Density Polyethylene (HDPE) as an Additional Binder in Porous Asphalt Pavement Open
Porous asphalt has excellent permeability and larger air voids. Due to the low stability strength of asphalt binder with aggregates, Malaysia uses porous asphalt roads for lightweight vehicle road transportation. Numerous studies indicate …
View article: Dynamic Stability of the Periodic and Aperiodic Structures of the Bernoulli-Euler Beams
Dynamic Stability of the Periodic and Aperiodic Structures of the Bernoulli-Euler Beams Open
The study analyzed the influence of periodic and aperiodic stiffness distribution for the four-element Bernoulli-Euler beam on the first two eigenfrequencies and the dynamic stability of the system. The influence of increasing the ratio of…
View article: Characterization of Doped ZnO Thin Film for Ammonia Gas Sensing Application
Characterization of Doped ZnO Thin Film for Ammonia Gas Sensing Application Open
This paper reports on the characterization of Sn- and Al-doped zinc oxide thin film for potential ammonia gas detection. The sol–gel method has been used to deposit the dopant onto the glass substrate at an annealing temperature of 500°C f…
View article: The Influence of Medium Movement on the Occurrence of Band Gaps in Quasi Two Dimensional Phononic Crystals
The Influence of Medium Movement on the Occurrence of Band Gaps in Quasi Two Dimensional Phononic Crystals Open
Phononic quasi-two-dimensional structures, due to their properties, namely the lack of propagation of selected frequency ranges of the mechanical wave, can be used as filters of acoustic waves. In the paper, an analysis of the propagation …
View article: Influence of Meta-Atom Geometry on the Occurrence of Local Resonance Regions in Two-Dimensional Finite Phononic Structures
Influence of Meta-Atom Geometry on the Occurrence of Local Resonance Regions in Two-Dimensional Finite Phononic Structures Open
In this work, the influence of different cross-sections of meta-atoms and their distribution on the occurrence of local resonance regions in inter-meta-atomic spaces of finite phononic structures was investigated. Software based on the Mat…
View article: Transmission of a Phononic Superlattice Made of Dynamic Materials
Transmission of a Phononic Superlattice Made of Dynamic Materials Open
In one-dimensional phononic crystals, as a result of multiple destructive interferences of a mechanical wave, the phononic band gap phenomenon occurs, i.e., the lack of propagation of a wave of a given frequency through the structure due t…
View article: The Influence of the Shape of Acoustic Impedance Change on the Propagation of a Mechanical Wave in Multilayer Phononic Structures
The Influence of the Shape of Acoustic Impedance Change on the Propagation of a Mechanical Wave in Multilayer Phononic Structures Open
Thanks to the use of modern intelligent materials, such as composites consisting of piezoceramic fibers embedded in epoxy resin and covered with alternating electrodes, electroactive polymers, dielectric elastomers, magnetostrictive compos…
View article: The Verification of the Correct Visibility of Horizontal Road Signs Using Deep Learning and Computer Vision
The Verification of the Correct Visibility of Horizontal Road Signs Using Deep Learning and Computer Vision Open
This research aimed to develop a system for classifying horizontal road signs as correct or with poor visibility. In Poland, road markings are applied by using a specialized white, reflective paint and require periodic repainting. Our deve…
View article: Influence of material distribution and damping on the dynamic stability of Bernoulli-Euler beams
Influence of material distribution and damping on the dynamic stability of Bernoulli-Euler beams Open
The study analyzed the influence of materials and different types of damping on the dynamic stability of the Bernoulli-Euler beam. Using the mode summation method and applying an orthogonal condition of eigenfunctions and describing the an…
View article: Influence of spatial distribution and the type of material on the occurrence of bandgaps in phononic crystals
Influence of spatial distribution and the type of material on the occurrence of bandgaps in phononic crystals Open
The study investigated the effect of the fill factor, lattice constant, and the shape and type of meta-atom material on the reduction of mechanical wave transmission in quasi-two-dimensional phononic structures. A finite difference algorit…
View article: Synthesis of Zn/TiO<sub>2</sub> Thin Films for Self-Cleaning Applications
Synthesis of Zn/TiO<sub>2</sub> Thin Films for Self-Cleaning Applications Open
Titanium dioxide (TiO2) thin film has been widely used in semiconductor applications.The surface modification on TiO2 has been done by adding zinc (Zn) in order to improve surface wettability and enhance the photocatalysis efficiency for s…
View article: The Influence of the Topology of Quasi One-Dimensional Structure on Frequency Distribution Inside Phononic Crystal
The Influence of the Topology of Quasi One-Dimensional Structure on Frequency Distribution Inside Phononic Crystal Open
In phononic crystals, for certain frequency ranges, the mechanical wave does not propagate.This phenomenon is called the occurrence of the phononic band gap and is related to the geometry of the structure, the spatial distribution of the m…
View article: Transmission in Two-Element Quasi One-Dimensional Acoustic Barriers
Transmission in Two-Element Quasi One-Dimensional Acoustic Barriers Open
The study analyzed the mechanical wave transmission for a source with a sound pressure level of 90 dB through all possible distributions of a finite multilayer structure made of air and polylactic acid.The structure was surrounded by air.T…
View article: Microstructural Study on Ag/TiO<sub>2</sub> Thin Film
Microstructural Study on Ag/TiO<sub>2</sub> Thin Film Open
The synthesis of Ag/TiO2 thin film was carried out by the sol-gel spin coating method using ITO glass as a substrate in a short period of stirring time, which is less than 25 min.The produced films were annealed in a furnace at 500 • C for…
View article: Influence of the Number of Meta-Atom Layers on the Occurrence of Local Resonances in Phononic Structures
Influence of the Number of Meta-Atom Layers on the Occurrence of Local Resonances in Phononic Structures Open
In order to investigate the effect of the number of meta-atomic layers on the propagation of the mechanical wave, studies on the propagation of the Gaussian impulse in structures with from one to five five-atomic layers in the phononic str…
View article: Improvements of Flexural Properties and Thermal Performance in Thin Geopolymer Based on Fly Ash and Ladle Furnace Slag Using Borax Decahydrates
Improvements of Flexural Properties and Thermal Performance in Thin Geopolymer Based on Fly Ash and Ladle Furnace Slag Using Borax Decahydrates Open
This paper elucidates the influence of borax decahydrate addition on the flexural and thermal properties of 10 mm thin fly ash/ladle furnace slag (FAS) geopolymers. The borax decahydrate (2, 4, 6, and 8 wt.%) was incorporated to produce FA…
View article: Preparation of Fly Ash-Ladle Furnace Slag Blended Geopolymer Foam via Pre-Foaming Method with Polyoxyethylene Alkyether Sulphate Incorporation
Preparation of Fly Ash-Ladle Furnace Slag Blended Geopolymer Foam via Pre-Foaming Method with Polyoxyethylene Alkyether Sulphate Incorporation Open
This paper uses polyoxyethylene alkyether sulphate (PAS) to form foam via pre-foaming method, which is then incorporated into geopolymer based on fly ash and ladle furnace slag. In the literature, only PAS-geopolymer foams made with single…
View article: Potential of Rapid Tooling in Rapid Heat Cycle Molding: A Review
Potential of Rapid Tooling in Rapid Heat Cycle Molding: A Review Open
Rapid tooling (RT) and additive manufacturing (AM) are currently being used in several parts of industry, particularly in the development of new products. The demand for timely deliveries of low-cost products in a variety of geometrical pa…
View article: The impact of microwave treatment on the chemical properties of sewerage sludge
The impact of microwave treatment on the chemical properties of sewerage sludge Open
Due to urbanization, the population in the major cities in Malaysia is approximately 72.8% of its total population. The increase of population density has directly increased the amount of sewerage sludge waste that poses threat to the envi…
View article: Effect of Rice Straw Ash (RSA) as partially replacement of cement toward fire resistance of self-compacting concrete
Effect of Rice Straw Ash (RSA) as partially replacement of cement toward fire resistance of self-compacting concrete Open
Malaysia’s construction industry is experiencing rapid growth, translating into increased demand for cement. However, cement production pollutes the air to the detriment of the climate via CO2 emission, making research into a cementitious …