Chulachomklao Royal Military Academy Journal

Comparison of Storages Performance in Big Data Platform

2024-05-31T10:17:29+07:00

From the continuous application of information technology in various fields today. This causes the amount of data in information systems to increase rapidly. The data that comes from the data source is stored sparsely in external systems. Before being imported and linked to store in the Big Data Platform, which is designed to support the storage and processing of large data. Get all types efficiently before being put to use in various dimensions such as data analysis, data service and sharing, and reporting. So that executives can use these data and reports to truly analyze and plan to drive the organization with data.

However, the imported data is stored in the big data platform coming from different external systems resulting in a variety of data storage formats. Each format has a different structure on the storage, such as a row-based or column-based data structure, storing as a binary or text file, and supporting data compression. Because each format has both advantages and disadvantages, we therefore studied and compared the efficiency of data file formats stored on the big data platform in order to find the most suitable data file format for working in various cases as efficiently as possible. The results of the experiment indicated that column-based data structures are better suited for importing and storing data taken from external sources, while row-based data structures are suitable for querying or analyzing the data with more complex commands.

Analysis of Airflow and Particulate Matter through Louvers within the Air Cavity with the CFD Model

2024-07-31T16:13:20+07:00

The building envelope design with louvers that protect it from solar radiation and residual particle matter is an idea for developing a building envelope system with higher performance. It requires designing an air circulation system and creating an environment within the air cavity that minimizes dust residues. Therefore, this research aims to predict the airflow pattern and residual particulate matter through the louvers within the air cavity with the Computational Fluid Dynamics (CFD) program. During the research stage, various parameters were studied, including the size of the air cavity, airflow inlet and outlet openings, the shape of the louvers, and the amount of particle matter remaining in the air cavity. These parameters were measured through four experimental boxes with different specifications to forecast the airflow and particulate matter behavior by applying the SOLIDWORKS 2023 (Flow Simulation) software. The findings indicated that reducing the size of the air cavity leads to higher internal pressure and air velocity. Vertical airflows ascending from the lower to the upper apertures exhibit reduced areas of stagnant air compared to downward airflows. The test box (a.2 ) can effectively remove up to 2 4 % of particulate matter without mechanical intervention. The data acquired from this research is preparatory to advancing building envelope technologies for enhanced efficiency in the future.

Prediction of deflection of composite plate with two opposite edges clamped and other two edges free using regression analysis

2025-05-01T10:37:09+07:00

This research aimed to analyze the deflection of composite plates with two opposite edges clamped and the other two edges free under uniformly distributed load. Nonlinear regression analysis was employed to predict the deflection by considering essential parameters, namely the geometric ratio and fiber orientation patterns. The regression analysis model was developed based on data obtained from finite element software simulations within a geometric ratio range of 1:1 to 5:1 and fiber orientation patterns of [0]4, [0/90]s, [90/0]s, and [90]4. The results indicated that the nonlinear regression analysis model could accurately predict the deflection, achieving a coefficient of determination greater than 0.95, and was able to capture the complex relationships among the parameters effectively. Moreover, equations with fewer parameters, such as the power and exponential equations, were more suitable for practical applications, as they reduced the risk of overfitting and were convenient for engineering interpretation. This research demonstrated the nonlinear regression analysis model as a powerful tool for designing composite structures that require precise deformation control.

The Development of Headquarters of Chulachomklao Royal Military Academy Building in Metaverse as a Defense Engineering Courseware via Virtual Reality Technology

2025-03-25T15:22:03+07:00

This research and development article focuses on the creation of the Command Building of Chulachomklao Royal Military Academy within the Metaverse. A framework was designed to serve as a guideline for engineers, providing a prototype model for the research and development of building construction in the Virtual reality. A fully detailed virtual replica of the Sukhothai Reception Room was created using Blender, complete with lifelike dimensions and design. The virtual walls beautifully display the names of all former commanders of the academy, adding historical value. The room serves as a virtual reception hall to welcome online visitors from around the world via live avatars. It is also used as a seminar room in the Metaverse, where cadets can join simultaneously as avatars, simulating a real-life classroom environment. Additionally, Unity was used to develop interactive learning media for the subject Defense Engineering in the Metaverse, allowing students to learn about firearm assembly through virtual reality technology. This research and development project aims to serve as a modern educational tool for defense engineering in Thailand, with the potential to be expanded and utilized further in the future.

Deformation of composite plate with two opposite edges clamped and other two edges free

2025-06-02T22:29:50+07:00

This research aimed to study the deformation of a composite plate with two opposite edges clamped and the other two edges free, subjected to a uniformly distributed load acting perpendicular to the plate. Finite element software was utilized to calculate the deflection and bending stress of the composite plate with geometric ratios from 1:1 to 5:1 and with [0]₄, [0/90]_s, [90/0]_s, and [90]₄ fiber arrangements. The study results indicated that the distributions of deflection and bending stress were similar across all geometric ratios, with the maximum deflection occurring at the center of the plate and the maximum bending stress occurring near the clamped edges. Additionally, the deflection and bending stress increased as the geometric ratios increased, due to the higher bending moment in the longer plates. The composite plates with [90]₄ fiber arrangement exhibited the highest deflection and bending stress compared to the other fiber arrangements, due to their lower axial bending stiffness and cross-sectional moment of inertia. The results of this study could serve as a guideline for designing composite structures that require controlled deflection and bending stress for appropriate engineering applications.

The Study and Development of Methods and A Chemical Reaction-Based Drinking Water Cooling Device for Military Field Training

2025-03-25T15:56:37+07:00

This research is an experimental study. The objective of this study was to determine the amount of chemicals that reduced the temperature of bottled drinking water 330 mL to 15°C in a shorter period of time than using ice, and to design and develop a chemical reaction-based drinking water cooling device for military field training. From the study, it was found that the average time taken by ice to reduce the temperature of drinking water to 15°C was 37.00±1.00 minutes. According to the study of the amount of chemicals to reduce the temperature of drinking water to 15°C, it was found that chemical reaction between 157.74 grams of barium hydroxide octahydrate and 76.12 grams of ammonium thiocyanate could reduce the temperature of drinking water to 15 °C in 30.33±0.58 minutes. For the design and development of a chemical reaction-based drinking water cooling device, the investigation into methods for releasing ammonia gas from the aluminum ziplock bag indicated that Method 3 was the most suitable approach. Similarly, in exploring ways to enhance the sealing efficiency of the aluminum ziplock bag, Method 3 also proved to be the most effective. When testing the efficiency of the drinking water cooling device that was developed, it was found that the device could reduce the temperature to 15°C with an average time of 14.00±1.00 minutes. This was less than the average time taken by using ice and chemical reaction.

Evaluation of the efficiency of domestic wastewater treatment and guidelines for reusing treated wastewater: A case study of Pattaya City

2025-06-14T21:48:59+07:00

Pattaya, a famous tourist city in Thailand, has more than 28.57 million cubic meters of community wastewater per year entering the wastewater treatment system. This study is an evaluation of the efficiency of domestic wastewater treatment and how to utilize treated water based on data on wastewater treatment results from 2018–2023, as well as water policies and management under the principles of sustainable water conservation. The evaluation results indicate that wastewater treatment plant 1 (Soi Nong Yai) and plant 2 (Soi Wat Bun Kanchanaram) receive more than 22.95 and 5.62 million cubic meters of wastewater per year, respectively. They are efficient in treating wastewater to meet the standards controlling the discharge of wastewater from the domestic wastewater system. The average removal efficiency of chemical oxygen demand (COD), biochemical oxygen demand (BOD), and total Kjeldahl nitrogen (TKN) was 54.81 - 69.36%, 63.56 - 82.27%, and 81.07 - 89.28%, respectively. Wastewater, after treatment directly or through processes that improve water quality, can be used in many ways—such as for watering trees in the city, agricultural purposes, commercial sales to industrial estates, or producing water during freshwater shortages—is an efficient way to utilize water and ensures sustainable availability.

Military Software Quality Assessment (MSQA) Framework: A Case Study of the Air Situation Display (ASD) System

2025-04-25T21:02:05+07:00

Software quality assessment is a critical factor in developing and validating software systems to ensure compliance with specific standards and requirements, especially for military software systems that are highly complex and must operate in challenging environments. Effective quality assessment ensures systems perform as expected and reduces risks from errors during development and maintenance. This paper presents a novel software quality assessment framework, called the Military Software Quality Assessment (MSQA) Framework, developed based on the ISO/IEC 25010 standard and integrating key related standards such as MIL-STD-498, MIL-STD-882, MIL-STD-1397C, MIL-STD-810, MIL-STD-461, ISO/IEC 12207, ISO/IEC 15504, and ISO/IEC 27001 to enhance comprehensiveness and suitability for military applications. A case study on the development of a radar display system for the Royal Thai Army demonstrates the practical application of MSQA in systematically assessing and improving software quality in a real-world military context.

The Development and Application of Robotics Technology in the Royal Thai Armed Forces : Challenges and Opportunities

2024-06-28T11:36:52+07:00

This article aims to examine the development and application of robotics technology in foreign military forces and analyze the challenges and opportunities for implementing robotics technology in the Royal Thai Armed Forces. The study finds that military superpowers have been continuously investing in the development of military robots and deploying them in various missions. The Royal Thai Armed Forces is in the initial stage of developing and applying robotics technology in military affairs, facing challenges in budget, technology, and personnel readiness. However, the Royal Thai Armed Forces has been pushing for research and development of robots through collaboration with research institutes and universities, as well as acquiring robots from abroad. This study offers policy recommendations to promote the development and application of robotics in the Royal Thai Armed Forces, including establishing clear policies and master plans, allocating budgets, fostering collaboration with the education and industrial sectors, developing personnel, and establishing a central agency. The findings suggest that systematic and continuous investment in robotics technology will enhance the capabilities of the Royal Thai Armed Forces, reduce personnel losses, and lay the foundation for the long-term defense industry.