Most seismic design methods generally use an equivalent-static lateral forces known as an elastic method to generate the lateral design force from the earthquake ground motions. Although this method is permissible under design ground acceleration, the accurate inelastic response is not well explained and still remains in extensive studies. In this regard, cumulative energy dissipation is an integral part of the design process in order to ensure t

Light Weight Deflectometer (LWD) is a portable device, an equipment that measures the vertical deformation imparted by a falling mass impacting a plate resting on the ground. It serves to determine the bearing capacity of compacted soil, sub-base and base course of structural pavement layers at the precise construction site. For Cambodian practices, field compaction quality and bearing capacity of the structural pavement layers evaluated by using

Global climate change is cumulatively a significant driver of global environmental changes such as flow regime, sediment, and nitrate. Thus, this study aims to estimate changes in sediment and nitrate loads under future climate change scenarios by using SWAT model in Prek Thnot river basin, Cambodia, and a tributary of the Lower Mekong River. The study included three different models (GCMs) under two emission scenarios (RCPs) for two-time horizon

This paper presents a comparative study on the direct seismic design methods for buckling-restrained knee-braced frames (BRKBFs) with single plate shear connections (SPSCs). Three significant methods, namely direct displacement-based design (DDBD), performance based-plastic design (PBPD), and yield point spectra (YPS) are investigated for the seismic application of the BRKBFs. The main objectives of this study are, (1) to determine the design bas

Precipitation variation always has an effect on the river streamflow. The change in discharge greatly impacts aquatic habitats, environmental amenities, recreational opportunities, irrigated agriculture production, hydropower production, and other industrial water uses. Therefore, studying the streamflow trends is important guidance for stakeholders and decision-makers to make a long-term and suitable management strategy. The aim of this study wa

The expansion of agricultural land, especially for commercial crops, and deforestation caused by ever-increasing domestic and social-economic development have influenced the streamflow and altered water resources in the Sen River, one of the largest tributaries of the Tonle Sap Lake in Cambodia. The objective of this study was to examine the streamflow under land use change by using Supervised Land Use Maps generated from satellite images. Landsa

The Royal Government of Cambodia has set a target of providing clean water to the residents of the whole country in 2025, in which up to 90% of households are covered by piped water supply. To date, nearly 400 water supplier providers (formal and informal) are presented and reported that existing infrastructure reveals poorly designed systems and construction mistakes. The standard design for water supply and modern technology was proposed to imp

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