Progress in Applied Science and Technology

Artificial Intelligence for Tattoo Classification in Identity Verification

2025-01-15T13:39:02+07:00

We recommended designing this system to be as efficient as possible in the detection of tattoos from missing persons, unidentified individuals, and unclaimed bodies for the purpose of gathering biometric data in terms of personal identification. The program will be revising in stages, classifying and labeling different kinds of tattoos to establish a standardized method to record biometric data of tattoos. Consistency, on the other hand, will help the concerned key agencies and departments—the Royal Thai Police, the Ministry of Social Development and Human Security, the Forensic Science Institute, and the Ministry of Public Health—to have all data recorded in organized and appropriate forms. A system with unveiled and standardized processes will enable matching of the database entries with a centralized set controlled by the Missing Persons, Unidentified Individuals, and Unidentified Corpses Tracking System Committee. This is a method that will ensure that success rates in establishing the identity of unidentified persons and their matching with the existing records are accomplished. A process guided by standards will minimize data entry errors, preserve precious time, and even reduce problems linked to personnel shortages. In this way, the program minimizes the need for specialized personnel in data input. This program also hopes to overcome discontinuities evident in 'data recording' by different agencies on a unified basis, in a collaborative manner. Finally, it promises to make tattoo-based identification more efficient, reliable, and accessible across agencies. The initiative would help law enforcement and social services bring clarity and closure to the agencies and the many families and communities affected by cases of missing and unidentified persons.

On the Diophantine Equation 1/w+1/x+1/y+1/z=u/u+1

2025-03-18T10:03:09+07:00

In 2023, Wongsanurak and Duangdai found all positive integer solutions of the Diophantine equation , when and are positive integers with and . In this work, by using an elementary approach, we solved the Diophantine equation for any positive integer and . The results of the research found that the Diophantine equation under the above conditions has twenty-seven positive integer solutions.

Optimizing Precursor pH for Enhanced WO₃/BiVO₄ Heterojunction Photoanode Performance

2025-03-15T19:34:28+07:00

The pH of the precursor solution significantly influences the efficacy of WO₃/BiVO₄ heterojunction photoanodes; however, the exact impact on the photoelectrocatalytic (PEC) process remains unclear. This study objectively examines the influence of the pH of the WO₃ precursor on the structural, optical, and electrochemical characteristics of FTO/WO₃/BiVO₄electrodes to enhance their performance in photoelectrochemical (PEC) applications. WO₃ and BiVO₄ are prepared via dip-coating, subsequently subjected to calcination at 500°C. The photoanode characteristic properties were examined using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), UV-Vis spectroscopy, and electrochemical impedance spectroscopy (EIS). The results indicated that the electrode efficiently segregated charge carriers due to its reduced bandgap energy (2.15 eV) and substantial light absorption (λ = 576 nm) at pH 11. In comparison to Ag/AgCl, we obtained a significant increase in current density (1.91 mA/cm²) with the utilization of visible light at 1.0 V. This addressed to a significant capacitance (CPE = 1.19 × 10⁻⁵ F) and a small charge transfer resistance (Rct = 116 Ω). A uniform, detailed morphology was noted in the SEM images at a pH of 11, which enhanced interfacial bonding and charge transfer. The results emphasize the necessity of adjusting the precursor's pH to improve the efficacy of WO₃/BiVO₄ heterojunctions employed in solar-driven oxidation processes. These findings will facilitate the advancement of sophisticated photoelectrocatalytic applications for sustainable energy conversion.