Science, Technology and Communication Journal

Novel approach peak tracking method for FBG: Gaussian polynomial technique

2024-08-18T12:08:50+07:00

This paper presents a novel approach for tracking the peaks in the FBG spectrum using the Gaussian polynomial method. The proposed algorithm involves preprocessing the FBG signal, detecting the peaks, and fitting the peaks with a Gaussian function. The performance of the algorithm is evaluated using both simulated and experimental FBG spectra. This method involves fitting a Gaussian function to the peak of interest and using the fitted parameters to estimate peak height, width, and location. The method is highly accurate and precise and can provide detailed information about peak shape and position, making it effective for tracking complex or overlapping peaks. However, the method can be computationally intensive and may require careful selection of initial parameters to ensure accurate results. Despite these limitations, the Gaussian polynomial method is a powerful tool for peak tracking and analysis in various application.

Determination of groundwater quality using geochemical methods in densely populated housing in Kubang Jaya Village, Siak Hulu District, Kampar Regency

2024-08-18T13:36:34+07:00

The determination of groundwater quality in dense residential housing in Kubang Jaya Village, Siak Hulu District, Kampar Regency has been carried out using physical and chemical parameters. This study aims to determine the quality of groundwater by taking samples of borehole water. Sampling was carried out at Ginting Housing; the number of samples taken was 17, and the distance between each sampling point was around 200 m. Parameters analyzed to test groundwater quality were turbidity, conductivity, pH, and total dissolved solids (TDS). Based on the results of groundwater quality tests in terms of turbidity level parameters, the average value was 2.0 NTU, conductivity was 191.7 ppm, pH was 4.28, and TDS was 132.4 mg/l. Overall, the results of the water quality test in this research area are unfit for consumption because they are too acidic, but they are still safe and suitable for daily needs.

Effect of ultraviolet radiation on total electron content in global positioning system observations

2024-08-19T11:12:54+07:00

Climate is one of the basic elements for understanding natural phenomena and the development of civilizations throughout history. Climate change determines most of the modifications of human nature and culture, as human must adapt to changing conditions which are sometimes an important element that can enhance or threaten its existence. This study aims to determine the characteristics of changes in the total electron content (TEC) and determine the radiation has influence to TEC through observing the global positioning system (GPS) in the ionosphere. In addition, the TEC is a measure of ionospheric parameters that affect the radiation that occurs. This study uses secondary data obtained from the Cibinong Spatial Global Station in 2008 – 2012. This research was conducted as a comparison of the TEC and extreme ultraviolet (EUV). The method used is a simple statistical method which seeks the maximum and minimum the TEC and EUV data, as well as the correlation method to relate the coefficient of determination TEC and EUV. As the results the maximum TEC value is 55.895 TECU which occurred in 2012 at 7 unit time (UT) and the minimum TEC value is 1.955 TECU which occurred in 2010 at 22 UT. The correlation ratio between the TEC and EUV is directly proportional, where the higher the value of the TEC, the higher the EUV value. In closing, TEC and EUV are influence by solar activity.

Properties of BaTiO3 nanoparticles based on FTIR derived using Nephelium lappaceum L. leaf extract

2024-08-19T13:08:43+07:00

The properties of barium titanate (BaTiO₃) nanoparticles synthesized with rambutan leaf extract (Nephelium lappaceum L.) were analyzed using Fourier transform infrared spectroscopy (FTIR) characterization techniques. Rambutan leaf extract contains bioactive compounds that have the potential to enhance unique physical and chemical properties. This study aims to analyze the properties of the nanoparticles and to characterize the functional groups present in BaTiO₃ nanoparticles synthesized using rambutan leaves. The nanoparticle synthesis process involved extraction, followed by the preparation of a BaTiO₃ solution and doping. The FTIR spectrum displayed characteristic peaks identifying the presence of functional groups. The results indicated that the region 3500 – 3200 cm^-1 corresponds to O–H groups (alcohol and phenolic), the region 1700 – 1600 cm^-1 to C=O groups (carbonyl), the region 1600 – 1500 cm^-1 to C=C groups (alkene), and the region 1200 – 1000 cm^-1 to C–O groups (ether). Each functional group exhibits distinct properties.

FTIR characterization analysis of BaTiO3 nanoparticles synthesized using Terminalia catappa leaf extract

2024-08-19T14:00:38+07:00

Ferroelectric materials are materials that are in great demand in high-density memory applications, such as ferroelectric random access memory, ferroelectric field effect transistors, negative capacitance field effect transistors, and ferroelectric tunnel junctions. Barium titanate (BaTiO₃) is a lead-free ferroelectric material with a high dielectric constant and low dielectric loss. The method used is sol gel for the synthesis of BaTiO₃ solution, extract for ketapang (Terminalia catappa) leaves, and characterized by FTIR. The FTIR spectrum synthesized with ketapang leaf extract displays several characteristic peaks in the mid-infrared region (4000 – 400 cm^-1). These peaks can be determined by the specific vibration mode of the structure and organic compounds contained in the ketapang leaf extract. BaTiO₃ has a cubic perovskite structure with a peak wave number of 600 cm^-1. Ketapang leaf extract is incorporated into the BaTiO₃ structure. BaTiO₃ has a Ti–O functional group. Ketapang leaf extract has C–O, C=O, C–H, and O–H functional groups.