Logo

Latest News

  • 01
    Oct. 2021

    Notice! For the author who submit the manuscript from the original submission system (before 2021/5/20)

  • 01
    Oct. 2021

    Happy New Year!!

Latest Articles

  • Open AccessArticle

    A Study of the Theoretical Model for Thicknesses of Chemical Reaction Layers of Silicon Wafers Soaked in Slurries of Different Temperatures and Different Volume Concentrations and the Regression Equation of Thickness of Chemical Reaction Layer

    by Zone-Ching Lin, Zih-Wun Jhang, Yan-Yu Chen and Bei-Chen Kuo

    Abstract

    This paper explores soaking of silicon wafers in slurries of four different temperatures and five different volume concentrations for 60 minutes, and then uses the probe of atomic force microscope (AFM) to apply a tiny downward force to form cutting depths inside the chemical reaction layers of silicon wafers so as to perform straight-line nanocutting. By substituting the obtained results in the specific downward force (SDFCreaction) equation, the paper obtains the respec tive (SDFCreaction) va...
  • Open AccessArticle

    Mechanical Performances and Physiological Parameters for Cyclists Riding with Bi-ellipse Sprocket: A Cross-Field Study

    by Ardi Lesmawanto, Soun-Cheng Wang and Shinn-Liang Chang

    Abstract

    The aim of this study is to compare the pedaling performances of a 32-tooth circular sprocket and four bi-ellipse sprockets with an increasing number of teeth (ranging from 33 to 36 teeth), where the maximum radius of the bi-ellipse sprocket is positioned at a 45-degree angle to the left crank. This comparison is conducted by evaluating both mechanical and physiological parameters. Nine recreational cyclists, with right-leg dominance and a minimum of one hour daily cycling over two years, partic...
  • Open AccessArticle

    Coupled Effects of Porous Medium Layer and Micro-Polar Lubricants on Transient Squeeze Elastohydrodynamic Lubrication

    by Li-Ming Chu, Chang-Jian Cai-Wan and Yuh-Ping Chang

    Abstract

    A numerical manner is expanded to calculate transient film thicknesses, pressures, and normal squeeze velocities during transient squeeze process in an isothermal elastohydrodynamic lubrication (EHL) spherical conjunction using micro-polar (MP) lubricants with porous medium layer (PML) for fixed loading. The transient modified Reynolds equation is obtained using Darcy’s law and Eringen’s micro-polar rheology according to cylinder coordinates. The coupled transient modified Reynolds, lubricant rh...
  • Open AccessArticle

    Adaptive Fractional Order PID Controller for Angle Tracking in Steer-By-Wire System

    by Cong-Cong Guo, Chang-Shui Wu, De-Guan He and Chang-Shui Wu

    Abstract

    To ensure fast and accurate angle tracking during car steering, reduce delay time, and improve the tracking performance of the Steer-by-Wire (SBW) system, a fractional order PID (FOPID) controller with feedforward compensation is designed. The PID controller is approximated using the Oustaloup approximation method, reducing the tuning dimension of FOPID. An improved particle swarm optimization (PSO) algorithm is utilized to dynamically adjust the four parameters of FOPID, thereby decreasing the ...
  • Open AccessArticle

    Numerical Analysis to Find Permeability of Lattice Structures

    by Pratik Prakash Gupta, Sundararaj Senthilkumar and Shung-Wen Kang

    Abstract

    As the need for efficient heat extraction grows with decreasing extraction areas, enhancing heat transfer device performance is crucial. Porous structures in thermal devices like heat pipes and vapor chambers can significantly improve heat transfer. Permeability, vital in fluid dynamics, affects fluid flow in porous materials, such as lattice structures. This study uses numerical analysis to assess the permeability of lattice structures, created using nTopology and analyzed with ANSYS Fluent sof...
  • Open AccessArticle

    Effects of Nano-Diamond Additives on the Tribological Performance Improvement of Lubricating Grease for Ball Screw

    by Yung-Chin Chiu and Hsiao-Yeh Chu

    Abstract

    This study presents groundbreaking insights into the tribological performance enhancement of lithium soap-based greases through the novel use of Ultra Dispersed nano-Diamonds (UDD). Uniquely, we explore the synergistic effects of Oleylamine (OLA) as a dispersant and different particle sizes of UDD, a methodology not extensively investigated in prior research. Our comprehensive four-ball tests reveal that a 100 ppm concentration of UDD with OLA significantly lowers the grease temperature and redu...
  • Open AccessArticle

    The Prediction of Photoactive Semiconductor Potential of Bio-Activated Rice Husk Ash Using Analytical Method

    by NM Dwidiani, NPG Suardana, ING Wardana, Willy Satrio N, IGK Puja, IGN Nitya Santhiarsa, WN Septiadi and AAA Suryawan

    Abstract

    This study investigates the photoactive potential of bio-activated rice husk ash (RHA) as a semiconductor using analytical methods for CuO and SiO2 extraction prediction. The study focuses on the enhancement of photoactive characteristics in RHA through bioactivation, utilizing pineapple peel juice as a natural activator. Analytical method based on UV-Vis spectroscopy peak frequency of RHA, sunked (SCNM), and floated (FCNM) products were utilized to determine CuO and SiO2 extraction potential. W...
  • Open AccessArticle

    Mechanical Properties and Microstructural Evolution of GTAW Welded Joints on Additively Manufactured Scalmalloy® and Extruded Aluminium Alloys

    by Celine Turangi, Marcel Schaefer, Junior Nomani, Florian Häslich, Tim Pasang, Shih-Jie Gao and Pai-Chen Lin

    Abstract

    Scalmalloy is an aluminium alloy developed for the additive manufacturing process of Selective Laser Melting. Size limitations often occurring in additive manufacturing due to chamber sizes can be overcome by welding parts together and to existing structures. In this paper, the feasibility of gas tungsten arc welding (GTAW) of Scalmalloy and welding Scalmalloy to extruded aluminium alloys using standard aluminium alloy GTAW parameters were demonstrated, and their resulting microstructures and me...
  • Open AccessArticle

    Development of LCD Projection-type Three-dimensional Continuous Printing System

    by Shih Hao Huang, Cho-Pei Jiang and Maziar Ramezani

    Abstract

    Vat photopolymerization (VP) technology is one of additive manufacturing (AM), commonly known as 3D printing, utilizes the light with proper wavelength to expose the photocurable resin inducing solidifica-tion by photopolymerization reaction. The existing AM machines face limitations in achieving mass pro-duction as they are designed for single-product output. This study proposes an innovative VP-based approach incorporating a liquid crystal display (LCD) to gener-ate digital dental model slices...
  • Open AccessArticle

    Additive Manufacture Applications to Harvest Energy Using Vortex-Induced Vibration Method

    by M Fahrur Rozy Hentihu, Asdin Amroe An-Nafi, Gaguk Jatisukamto, Agus Triono and Hary Sutjahjono

    Abstract

    The experiment was able to produce an application of additive manufacturing to harvest energy. The way to harvest energy uses the Vortex-Induced Vibration (VIV) method. The manufacturing process uses the Additive Manufacturing Fused Deposition Modeling (AM FDM) method. In this experiment, the length of the VIV apparatus was varied. From research it was found that, the longer the apparatus, the smaller the voltage produced. At the same time, the resulting vortex shedding frequency is also getting...
TOP