Thailand Electrical Engineering Journal (TEEJ)

AWC: Alternating Wireless Channel for VANET Information Dissemination

2025-12-10T09:41:54+07:00

This paper proposes the concept of the information dissemination model for VANETs communication system. ¹The purpose of this article is to solve the problem of collision avoidance and message unreachable. ²An alternating wireless channel (AWC) model was develop different wireless channels for dissemination messages to target stations. ³The AWC model studies the performance of disseminate information base on a fixed grid network; investigate the broadcasted message using AWC in $m\times n$ and $n\times n$ grid and then assigned to realize vehicular transport system by broadcast message agent (BMA). ⁴A BMA algorithm used the lane level position to design the odd-even lanes. ⁵This articles the wireless channel's policy is the odd lane broadcast channel x and even lane broadcast channel y.

Design of Anti-Rodent All-Dielectric Round Type Access Optical Cable

2025-12-10T09:51:56+07:00

This paper presents the design of anti-rodent all-dielectric round type optical fiber cable for access network to the end user. The design focuses on the structure of the round type cable using nylon-6 for cable jacket to provide small size cable and the tolerance to the rodent whereas the optical and mechanical properties of the cable must agree with the international standard.

Weighted Histogram Equalization Using Entropy of Probability Density Function

2025-12-10T10:00:23+07:00

Low-contrast image enhancement is essential for high-quality image display and other visual applications. However, it is a challenging task as the enhancement is expected to increase the visibility of an image while maintaining its naturalness. In this paper, the weighted histogram equalization using the entropy of the probability density function is proposed. The computation of the local mapping functions utilizes the relationship between non-height bin and height bin distributions. Finally, the complete tone mapping function is produced by concatenating local mapping functions. Computer simulation results on the CSIQ dataset demonstrate that the proposed method produces images with higher visibility and visual quality, which outperforms traditional and recently proposed contrast enhancement algorithms methods in qualitative and quantitative metrics.

Economic Assessment of Solar Energy Use in Residential Area during Work from Home (WFH)

2025-12-10T10:04:07+07:00

This paper presents the economic assessment of solar powered in residential area during the Work From Home (WFH) period. The study and analysis approach is divided into three parts: cost and benefit analyses; and analyze the economic value of the energy which is produced by using solar panels and the amount of electricity that can be saved during work from home using the net present value (NPV) analysis, internal rate of return (IRR), and payback period (PB). From the simulation with the discount rate of 5.69% in 2020, it was found that the NPV of the project can be calculated equal to 32,971 baht, the IRR is 7.12% and has a PB period in the 12th year in the case of the government did not accept the purchase with the excess electricity. In the case of the government purchasing excess electricity, the NPV of the project can be calculated equal to 83,015 baht, IRR is 9.18% and it has a 10-year PB period. In terms of economics and financial viability. it can be concluded that the studied project is worth to invest during the WFH period.

Application of Solar Energy to Battery Charging for Electric Vehicle

2025-12-10T10:07:43+07:00

This paper presents the application of solar energy to charge battery for electric vehicle. The principle is to use solar cells as a device that converts solar energy into electrical energy. This work uses a PWM battery charge regulator to provide 24 Vdc voltage, which has a battery protection circuit when charging until the voltage is higher than 26 Vdc. The test results showed that a fully charged battery is used to power an electric vehicle with a user weight of 60 kg. The electric vehicle can be driven at speeds of 16 kilometers per hour for 12 minutes continuously. Because this electric vehicle does not use fossil fuels as a power source, so it reduces pollution to the environment.