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

Humans have fast and accurate visual system that allows them to perform complex tasks like driving with a little consciousness. Without visual system, UAV cannot do complex tasks like humans. When UAVs are equipped with visual system and trained with fast and accurate model, they will be able to carry out even more complex tasks such as autonomous landing. Computer vision is a technique suitable for UAV visual system. In this paper, we consider a

In mobile robotic field, one of the most important tasks in mobile robot navigation is Robot Localization. Localization is the task of determining the location of the robot inside the environment at a specific time step. To obtain the position and the orientation of the robot, various sensors have been utilized along with implementation of numerous kinds of algorithms. In this paper, the sensor fusion based on Extended Kalman Filter (EKF) algorit

In the past decades, many research and experiment on hybrid rocket propulsion has grown rapidly. Such rocket propulsion is considered as green propulsion system as the exhaust products cause less harm to the environment. Unlike solid rocket and liquid rocket propulsion, hybrid rocket propulsion takes the advantage that the fuel is in solid form while the oxidizer is in liquid or gaseous form. Any leakage of the oxidizer piping system will not res

The advanced technology for the wastewater treatment process is still limited in Cambodia especially for small-medium enterprises (SME) that are facing their profit margin. The system which used coconut fiber as filter media (CFFM) was developed for wastewater treatment in this study and the influent wastewater was characterized before treatment. The aim of this study is overall to estimate the efficiency of CFFM with various media ratios of coco

Natural occurrences of arsenic in groundwater have been identified as a major threat to public health affecting 2.5 million Cambodians in at least 10 provinces, among which Kandal is the most heavily suffered. To alleviate the impacts, the arsenic contamination has been mitigated by abandoning the affected groundwater or remediated by applying arsenic removal technology (ART). For a sustainable solution, the ART putting to use in developing count

The study was conducted to isolate lactic acid bacteria (LAB) from three types of soy-based products including soy sauce in moromi stage, Japanese Miso paste, and Cambodian fermented soybean (Sieng). The isolated LAB strains were characterized in terms of catalase, morphology by Gram-staining, and observation under microscope. Moreover, their tolerance to temperature, pH, salt concentration, lactic acid screening, and gas production were also det

Tonle Sap Biosphere Reserve (TSBR) is a seasonally inundated freshwater lake in South-East Asia. Nowadays, TSBR is very concerned with many influence factors especially the contaminants (nutrients and heavy metals) in sediment that can cause water damage and water degradation in the lake. In this study, the concentrations of heavy metals and nutrients in fourteen bottom sediment samples in dry season from the lake were investigated to evaluate th