https://sintechcomjournal.com/index.php/stc/issue/feed Science, Technology and Communication Journal 2024-03-05T10:33:19+07:00 Rahmad Abdillah rahmad@sintechcomjournal.com Open Journal Systems <p>Sintechcom Journal: Science, Technology, and Communication Journal is a peer-reviewed journal published regularly in February, June, and October by the <u>Lembaga Studi Pendidikan and Rekayasa Alam Riau</u> in co-working with the Indonesian physical society (PSI)-Chapter of Riau. Sintechcom is a periodical publication that publishes scientific articles on research results in the fields of Basic Science, Engineering, and Telecommunications.</p> <p>Sintechcom journal receives research articles from researchers around the globe, as well as undergraduate and graduate students. Every submitted manuscript has the opportunity to maximize its scientific potential through input from a team of editors and reviewers who are experts in their fields. So that published articles can contribute to the advancement of Science, Technology and Communication. Paper template <a style="background-color: #ffffff;" href="https://drive.google.com/file/d/1E44KN_XUadzQA_Vg7_bEEL8HX4ymzukx/view?usp=sharing" target="_blank" rel="noopener"><strong>here</strong></a></p> https://sintechcomjournal.com/index.php/stc/article/view/260 Characteristics of human voice vibrations based on FBG strains 2024-03-05T10:33:19+07:00 Saktioto Saktioto saktioto@lecturer.unri.ac.id Rani Nurpadilla saktioto@lecturer.unri.ac.id Bunga Meyzia saktioto@lecturer.unri.ac.id Haryana Mohd Hairi saktioto@lecturer.unri.ac.id Mohammed M Fadhali saktioto@lecturer.unri.ac.id Preecha Yupapin preecha@techsakon.ac.th <p>FBG is widely developed as a sensor in its application as a sensor, FBG is commonly used either in industry or in clinical applications to measure changes in physical parameters such as pressure, strain, temperature, and corrosion, as well as to monitor the body's heartbeat and breathing. This research uses 2 types of FBG, namely uniform and chirping. The spectrum used is in the range of 1550 nm. Using an optical sensing interrogator as a tool to read wavelength changes as well as input and output with an infrared laser light source. This study aims to analyze the response of FBG sensors to human voice vibrations with variations in the intensity of sound violence. The results showed that at a hardness intensity of 60 dB using a uniform FBG with a reflectivity of 10% experienced a wavelength change of -0.0304 nm, at an intensity of 70 dB 0.0304 nm, and an intensity of 80 dB experienced many wavelength changes 0.06669 nm. The greater the intensity of the sound, the more FBG response shows an increase in wavelength. The largest strain value detected by the uniform FBG with 10% reflectivity is at 70 dB intensity of 5.5579 × 10<sup>-5</sup> strain while the lowest value is at 80 dB intensity of 4.4816 × 10<sup>-5</sup> strain. The chirping FBG with 10% reflectivity has the highest strain value at 70 dB intensity with a respective strain value of 1.18 × 10<sup>-4</sup> strain. Giving sound vibrations such as some of A, I, U, E, and O to FBG is useful for calculating how the transmission peak of FBG shifts due to strain. When the object emits sound vibrations with a certain intensity, the pressure that occurs will be more than the object when it is at rest, so the greater the sound vibration, the greater the strain that occurs.</p> 2024-02-29T00:00:00+07:00 Copyright (c) 2024 Science, Technology and Communication Journal https://sintechcomjournal.com/index.php/stc/article/view/256 Interpretation of subsurface layers using the Wenner configuration geoelectric method and geochemical tests: Case study at Muara Fajar landfill – Rumbai, Pekanbaru 2024-03-05T09:58:25+07:00 Juandi Muhammad juandi@lecturer.unri.ac.id Theodora Citra juandi@lecturer.unri.ac.id Anisa Rahmalia juandi@lecturer.unri.ac.id <p>The need for water daily is a big problem for people living around Muara Fajar landfill – Rumbai, Pekanbaru. This study aims to identify the depth of subsurface structures around the Muara Fajar landfill area using the Wenner configuration dielectric method and determine the water quality in the community wells around the landfill site. The data obtained in the acquisition process are used to calculate the apparent resistivity value at each measurement point and analyzed quantitatively and qualitatively. Then proceed with the inversion process using the progress program so that obtained resistivity value and layer thickness at each point of measurement. The results of measurement in track-1 get a range of resistivity values ranging from 62.9 – 171 ohm-meters and track-2 from 32.4 – 70.6 ohm-meters. Underground water taken is residents' well water in the research area as many as 5 sample points using GPS. This underground water sample will be tested with parameters such as pH, TDS, BOD, COD, NH<sub>3</sub>, and turbidity. Underground water cannot be consumed from the results of the water quality test with the parameters mentioned at the beginning if referring to the Regulation of the Minister of Health of the Republic of Indonesia because the pH obtained in all underground water samples is &lt; 6.5 or acidic, the value of the BOD, COD, NH<sub>3</sub>, and turbidity parameters, the values are by the quality standard.</p> 2024-02-29T00:00:00+07:00 Copyright (c) 2024 Science, Technology and Communication Journal https://sintechcomjournal.com/index.php/stc/article/view/258 Fluid continuity equation simulation: Monitoring fluid reservoir volume in the heart over time 2024-03-05T10:16:08+07:00 Olivia Maftukhaturrizqoh oliviamaftukha@student.uns.ac.id Agung Dwi Wijaya oliviamaftukha@student.uns.ac.id Iftita Ida Sofia oliviamaftukha@student.uns.ac.id Mohtar Yunianto oliviamaftukha@student.uns.ac.id <p>Fluid flowing in a cross-section of a channel follows the law of continuity, namely the mass rate of fluid entering will be the same as the mass rate of fluid leaving. One of the applications of fluid flow is in human blood flow. Blood flow is controlled by the heart which functions to pump blood to and from the heart. The flow of blood entering and leaving the heart is determined by the cross-sectional area of the channel and the speed of blood flow through the heart. The speed of blood flow in the heart consists of two speeds, namely the systolic speed when blood leaves the heart and the diastolic speed when blood enters the heart. So that the volume in the heart can be observed changes over time. By creating a simulation using the MATLAB programming language, the difference between normal heart volume and problematic heart volume can be known. A program called reservoir and cardiac based on graphical user interface was created to determine the volume of fluid in the reservoir at any time and compare the volume of fluid in normal and abnormal hearts concerning time in 1 systole-diastole cycle.</p> 2024-02-29T00:00:00+07:00 Copyright (c) 2024 Science, Technology and Communication Journal https://sintechcomjournal.com/index.php/stc/article/view/257 Peatland aquifer zone modeling via Wenner and Schlumberger configuration geoelectric strategies in Tarai Bangun Village, Riau Province, Indonesia 2024-03-05T10:04:39+07:00 Tumbur Marudut Tua Sitinjak juandi@lecturer.unri.ac.id Juandi Muhammad juandi@lecturer.unri.ac.id Rahmi Dewi juandi@lecturer.unri.ac.id <p>The quality of freshwater in peatland areas poses significant concerns for both governmental bodies and local communities. Challenges arise during well drilling activities, where individuals often encounter difficulties in accessing fresh water, either due to its absence or contamination with peat-infused water. Tarai Bangun Village, situated in the Kampar Regency of Riau, represents a critical peatland region warranting thorough investigation, particularly along street of Sarana Utama. Despite lacking social amenities such as markets, the area is equipped with essential facilities like schools and places of worship. This study aims to assess the efficacy of Wenner and Schlumberger configuration modeling in horizontal and vertical soil mapping, thereby facilitating a comprehensive understanding of groundwater distribution and aquifer zoning within the peatland areas under examination. Analysis conducted utilizing Res2DInv software for horizontal modeling revealed significant findings. In track 1, groundwater layers were identified at depths of 6.50 meters and 19 meters, comprising gravel, sandstone, and limestone. Track 2 exhibited an aquifer layer spanning depths from 2.50 meters to 24.9 meters, consisting of alluvium, gravel, and limestone. Furthermore, interpretation of 1D geoelectric vertical model cross-sections using Progress software unveiled additional insights. Path 1 delineated depths of 0.12 meters, 19.30 meters, and beyond 41.28 meters, featuring a lithological composition of sandstone, limestone, and dry gravel. Path 2 showcased depths of 0.14 meters, 9.43 meters, and exceeding 12.02 meters, characterized by dry sand and gravel formations.</p> 2024-02-29T00:00:00+07:00 Copyright (c) 2024 Science, Technology and Communication Journal https://sintechcomjournal.com/index.php/stc/article/view/259 Negative refractive index anomaly characteristics of SRR hexagonal array metamaterials 2024-03-05T10:27:02+07:00 Moh. Danil Hendry Gamal yansoerbakti2@gmail.com Yan Soerbakti jansoerjansoer@gmail.com Zamri Zamri yansoerbakti2@gmail.com Saktioto Saktioto yansoerbakti2@gmail.com Defrianto Defrianto yansoerbakti2@gmail.com Romi Fadli Syahputra romifadli@umri.ac.id Vepy Asyana vepy.asyana@lecturer.unri.ac.id <p>Metamaterials possess distinct characteristics that make them very suitable for scientific investigation. This phenomenon's hallmark has left scientists perplexed and skeptical. Researchers have conducted numerous studies to explore the composition of one or more metamaterials. This project focused on the development of a linear-sequence metamaterial. Next, we examined the alterations in the optical characteristics of the metamaterial. The utilized frequency range is 0 to 9 GHz. We construct the hexagonal split ring resonance (SRR) metamaterial with a radius of 2.9 mm, consisting of one to four hexagonal SRRs. The findings revealed that the SRR hexagonal metamaterial structure had the highest negative refractive index value, reaching -9.33 in combinations of four hexagonal SRRs.</p> 2024-02-29T00:00:00+07:00 Copyright (c) 2024 Science, Technology and Communication Journal