The Koh Norea cable-stayed bridge, which connects the islands of Koh Pich and Koh Norea, is considered as one of Cambodia's most significant projects. The main bridge is an extrados cable-stayed bridge with two tall pylons. The pylon is supported by eighteen 2.0m diameter, 62.60m long drilled piles that are rock socketed into coal measure sandstone. Large diameter super-long bored piles typically have a high bearing capacity. The self-balanced me

This article presents a sensorless control system of permanent magnet synchronous motor (PMSM) for solar electric tuktuk (E-tuktuk) application. This study purposes a new method of control algorithm of PMSM for E-tuktuk with low-cost by using the sensorless strategy. The sensorless strategy covers the estimated rotor speed and position of PMSM, and a sliding mode observer (SMO) is proposed in this study. The SMO is the most popular method of sens

Hot-air drying technique helps remove water content, prevents the quality of tomatoes from microbial growth, and extends their shelf life. Nevertheless, hot-air drying could affect dried products' nutritional value and physicochemical quality. Therefore, this study investigated the drying kinetics and the changes of physicochemical and bioactive compounds of local tomatoes (Cherry and Holland) during processing into dried tomatoes. To process the

In urban areas, there is concern that storm water runoff and flooding may be intensified because of the effect of climate change on precipitation amounts, intensities, and frequencies. The objective of this study is to use the Storm Water Management Model (SWMM) to assess the existing drainage’s capacity, to quantify the impact of climate change on existing drainage system and to propose a structural measure for reducing the flood impact. The SWM

Accelerated soil erosion caused by water is one of the most widespread problems affecting environmental quality, agricultural productivity, and food security in many countries. These issues tend to cause more severe impacts on developing countries, especially in the tropical highland areas. Therefore, this study was conducted in the Prek Thnot Basin, a sub-catchment of the Mekong Basin in Cambodia, to (1) simulate sediment yield at the outlet by

Herbs and spices are known to have high biological activities such as antimicrobial, antioxidant, and so on. However, it depends on the types of bioactive compounds present in the extracts. The quality of the extracts is strongly dependent on the extraction method and extraction conditions. In this study, we focused on the investigation of the effect of extraction time and solvent types on the extraction yield of bioactive compounds such as total

Natural rubber (NR) is often compounded with inorganic fillers such as clay to broaden its applications, reduce the production cost, and also to impart good mechanical properties. In this study, the effect of local clay on physical and mechanical properties of Cambodian clay-filled natural rubber latex foams was investigated. The natural rubber latex foam was produced via the Dunlop method through the conventional vulcanization system with sulfur

The aim of this study is to investigate the organic petrology of shale in Phnom Mreach, Angkor Chum District, Siem Reap province, onshore Cambodia. Thin-section is carried out to analyze mineral compositions, sedimentary texture, and shale classification. Polish-section is used to identify the types of organic matter under reflected light. Scanning electron microscope (SEM) is analyzed for further detailed study on types and morphology of organic

Facing many issues of insufficient electricity from the grid and especially frequent blackout, most factories, apartments, and hotels that are operating a cooking machine, extruder machine, and server spend much cost on waiting time, machine maintenance, replaced raw material, and labor. Therefore, ensuring sufficient and stable electricity becomes the main role to solve this problem. This paper provides SOGE hybrid system design concept that can

Cambodia's first CubeSat Apsara-1 is being developed through an ongoing collaboration between the Institute of Technology of Cambodia and the University of Tokyo. In the early project phase, simulation methods are required for mission design. One important component, needed to predict the mission lifetime, is an orbital simulator. For example, Apsara1 is planned to be launched into orbit in 2024 when solar activity is near its peak, leading to hi