Recent Articles

Increasing waste disposal and energy demand are a problem in the city today. Densification of biomass waste from sawdust and tree leaves into solid fuel briquette not only reduces waste reduction but can also be an alternative source. Raw materials and binders are two essential variables, among other important variables, presented in this article. Fish oil extracted from fish residues is a combustible binder with a high heating value. Investigati

This paper presents flexural strength, flexural modulus as well as the weight percentage of porosity in specimen by mixing two kind of epoxy resins for Sikadur® 31 CF Normal and Sikadur® 52 TH. The ratio of mixed Sikadur 31-52 following by 100%-0%, 66%-33%, 50%-50%, 33%-66% and 0%-100%, respectively with 3, 6, and 9 days curing time. The aim of this project helps to choose the correct proportions for renovating archeological structures, and espec

This paper provided a design process of a new structure of Computer Numerical Control (CNC) machine that can move 3-axis simultaneously and is capable of engraving specimens such as wood and plastic properly. The fabrication method and machine control were divided into three major steps. Firstly, the mechanical systems of the CNC structure such as the frame, joints, and movable axis were built. Secondly, the electronic devices and microcontroller

This paper describes the mathematical model, control and simulation of 3DoF (Degrees of Freedom) robot manipulator moving in a three-dimensions Cartesian coordinate frame. The four Denavit-Hartenberg (D-H) parameters are used to determine the homogenous transformations matrices of the links of the robot and express the robot’s forward kinematics. Both link position and orientation are embedded in the homogeneous transformation matrix. The geometr

The robot localization is a crucial task that needs to be solved as a part of the navigation problem for an autonomous robot. In order to estimate the location of a robot in the environment, various sensors are used to extract meaningful information from measurements to acquire knowledge about the robot’s environment and motion. Due to the fact that the sensor uncertainty is random, it is impossible to find an accurate pose for the robot by only

Instead of using battery storage for operating the irrigation system that is driven by solar energy, the gravity irrigation system has been used and grown popularity nowadays. However, this system cannot provide the balance flow rate every irrigation time that is going to affect the quantity of water need to irrigate due to the fluctuated of the static pressure that remains in the tank. So, this study is going to develop a smart irrigation contro

This paper provides Simultaneous Localization and Mapping (SLAM) for generating a 3D map of an environment. It takes the approach of graph-based SLAM with loop closure detection in the use of RGB-D (Red, Green, Blue and Depth) camera to generate the 3D map of an unknown environment. In real-time applications, localization and mapping require both accuracy and robustness. Thus, in this paper, a lighter weight Intel RealSense d435i RGB-D (with buil

The growing popularity of transport services via ride-hailing apps (RHAs) has posed major debates for transport researchers and planners in many cities worldwide. In Asia, there remains limited information and data about the characteristics of RHA users. This paper investigated the factors affecting users’ utilization rate of RHA services. Zero-Inflated Ordered Probit Model (ZIOPM) was applied with data collected from 1,108 citizens (87.5% aged 1

Plastic bags are used widely across nations and became famous for carrying goods and packing products since 1970 and they start to rapidly popularized in the 20thcentury. People live in Phnom Penh City, the capital city of Cambodia, also use large amount of plastic bags due to various reasons such as their convenience, inexpensive, get free of charge, and easy to get. Plastic bags use has rapidly increased as result of changing life styles, popul

Tonle Sap Biosphere Reserve (TSBR), the largest productive freshwater lake in Southeast Asia regions, is recognized by UNESCO in 1997. TSBR gives a huge benefit to Cambodian, especially for riparian settlement along the lake. The surface area of TSBR changes from 250 000 to 300 000 ha in dry season with the level of water about 1.5m, while in rainy season the area is increased from 1 to 1.3 million ha with the level of water from 8 to 10m. TSBR

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