cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Rahmad Abdillah
Contact Email
rahmad@sintechcomjournal.com
Phone
+628117087858
Journal Mail Official
rahmad@sintechcomjournal.com
Editorial Address
JL. MERANTI NO.8 LABUH BARU PEKANBARU
Location
Kota pekanbaru,
Riau
INDONESIA
Science, Technology, and Communication Journal
Published by Lembaga Studi Pendidikan and Rekayasa Alam Riau
ISSN : -     EISSN : 27748782     DOI : https://doi.org/10.59190/stc
Core Subject : Science, Engineering,
Computer Science & IT Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology
Sintechcom is a periodical publication that publishes scientific articles on research results in the fields of Basic Science, Engineering, and Telecommunications. Scopes of journal are: Chemistry and Chemical Engineering; Physics, Material Sciences, and Mechanical Engineering; Biology, Biological and Bio System Engineering; Food and Agriculture Engineering; Statistics and Mathematics; Computer Science and Computational Science; Earth Science and Engineering; Space Engineering; Electrical Engineering; Environmental Science and Soil Science; Telecommunication; Electronic and Optic Communication; Image Processing, Computer Vision and Pattern Recognition ; Energy Conservation and Renewable Energy; Information System and Artificial Intelligence.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 85 Documents
 5   6   7   8   9 
Green-synthesized ZnO and Ag nanoparticles: A comparative study of optical, morphology and structural properties for photocatalytic applications Hamzah, Yanuar; Emrinaldi, Tengku; Dewi, Rahmi; Rini, Ari Sulistyo; Umar, Lazuardi; Simatupang, Mediniah Putri; Rabiah, Rabiah; Noferdi, Muhammad Deri
Science, Technology, and Communication Journal Vol. 5 No. 3 (2025): SINTECHCOM Journal (June 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v5i3.307

Abstract

In this study, zinc oxide (ZnO) and silver (Ag) nanoparticles were synthesized using Annona muricata leaf extract as a reducing and stabilizing agent with variations in the molar ratio of 1:3, 1:5, and 1:7. Optical characterization using UV-Visible spectroscopy revealed that the variations of molar ratio influence the absorption peak and band gap energy of the resulting ZnO and Ag. UV-Vis results show that the molar ratio 1:5 was optimal for synthesizing ZnO and Ag. The band gap value of synthesized ZnO and Ag at a 1:5 molar ratio was 3.27 eV and 2.01 eV, with absorption peaks at 355 nm and 435 nm respectively. XRD characterization shows that ZnO nanoparticles has a hexagonal wurtzite structure with lattice parameters of a = 76 Å and c = 4. 95 Å and for Ag nanoparticles has a face centered cubic structure with lattice parameters a = b = c is 4.15 Å. Annona muricata leaves extract shows photocatalytic properties that can be applied to the degradation of polluted water. This shows that ZnO nanoparticles via green synthesis using Annona muricata leaf extract is a very simple, low-cost and environmentally friendly method.
Design and fabrication of chitin-derived electrodes with optimization of temperature carbonization for energy storage in supercapacitors Farma, Rakhmawati; Meisya, Meisya; Apriyani, Irma; Awitdrus, Awitdrus; Taer, Erman
Science, Technology, and Communication Journal Vol. 5 No. 3 (2025): SINTECHCOM Journal (June 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v5i3.310

Abstract

Supercapacitors have become one of the potential solutions for efficient energy storage, and the development of carbon-based electrodes from biomass has received increasing attention due to their sustainability. This study aims to produce carbon electrodes from crab shells (CS) as biomass materials by optimizing the carbonization process with temperature variations of 600°C, 700°C, and 800°C for supercapacitor cell applications. Material characterization shows that the carbonization temperature of 700°C produces carbon electrodes with optimal semicrystalline structures and mesopore dominance, which supports efficient ion diffusion. The CS-700 carbon electrode showed the highest specific capacitance of 118.84 F/g in cyclic voltammetry tests with 1 M H2SO4 electrolyte. These results indicate that carbonization at 700°C provides the best electrochemical performance, making it the optimal condition for developing efficient and environmentally friendly mud crab shell biomass-based electrodes for supercapacitor cell applications.
UI/UX design thinking adoption for integrated AI point-of-sale system (Case study: Plastic Poultry Wholesale Store) Okfalisa, Okfalisa; Fahruddin, Fahruddin; Setiaji, Haris; Pratama, M Farhan Aulia; Finaldhi, Harry; Delifah, Nur
Science, Technology, and Communication Journal Vol. 5 No. 3 (2025): SINTECHCOM Journal (June 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v5i3.311

Abstract

The development of artificial intelligence (AI) technology drives the need for a point of sales (POS) system that is not only efficient, but can also provide adaptive information according to the user's sudden wishes. This research implements the design thinking method in designing a user interface (UI/UX) for a smart POS system integrated with conversational AI features. A case study was conducted at a Plastic Poultry Wholesale Store to gain in-depth insights related to field needs and operational challenges faced. The design thinking method was chosen because of its user-centered approach, through the stages of empathize, define, ideate, prototype, and testing, it is hoped that the final results obtained can be aligned with the concrete needs of users, so that the output of the system that has been designed will not be abandoned, but will always be used. In this design, the implementation of conversational AI is used to enhance the user experience through a virtual assistant feature that is able to answer dynamic questions according to the wishes of the user, so that users can freely explore any information in detail related to their overall business performance. The implementation results show that this system not only increases operational efficiency, but also improves user experience through more intuitive interactions when they want to see their business performance. This research contributes to integrating AI technology with a user-centered design approach for smart, responsive, and adaptive POS system solutions.
Argon plasma ionization in thermodynamic equilibrium with continuity equation Kasri, Anshori; Saktioto, Saktioto; Farma, Rakhmawati; Rini, Ari Sulistyo; Erwin, Erwin; Awitdrus, Awitdrus
Science, Technology, and Communication Journal Vol. 5 No. 3 (2025): SINTECHCOM Journal (June 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v5i3.318

Abstract

Local thermodynamic equilibrium is a foundational concept in plasma physics and heat transfer, describing a state where each small region of a system can be treated as if it is in thermodynamic equilibrium, even if the whole system is not. However, achieving accurately perfect thermodynamic equilibrium conditions in real-experiments is often challenging. It often struggles for understanding phenomena like excited states or specific Arrhenius-driven reactions. As a result, the advantages of plasma modeling with simplifications can sometimes overshadow the disadvantages of experiments. This study simulated the ionization process of argon plasma using the 4th order Runge-Kutta numerical method. The simulation, initiated with initial densities before the simulation is run, each of them is electrons 2.6 × 1018 m-3, neutral argon (Ar) 2.6 × 1018 m-3, positive argon ions (Ar+) 2.6 × 1018 m-3, and positive diatomic argon ions (Ar2+) 2.6 × 1018 m-3, successfully obtained reaction rate equilibrium data at the 625th iteration. The final densities observed were 2.46 × 1018 m-3 for electrons, 2.27 × 1018 m-3 for neutral argon, 6.4 × 1015 m-3 for Ar+, and 4.34 × 1017 m-3 for Ar2+. These results show the equilibrium reaction rate in argon plasma which provides information that density of electron and Ar+ species show a decreasing trend while density of Ar and Ar2+ species shows an increasing trend which are the result of ionization and recombination processes in the entire plasma system.
Analysis of bending losses in single-mode optical fiber for determining optical signal quality Ramadhani, Fatima Nur; Saktioto, Saktioto; Zulkarnain, Zulkarnain; Defrianto, Defrianto; Fadhali, Mohammed M
Science, Technology, and Communication Journal Vol. 5 No. 3 (2025): SINTECHCOM Journal (June 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v5i3.324

Abstract

Optical fiber is an advanced transmission medium composed of glass fibers, offering significantly higher data transfer speeds compared to conventional electrical cables. This study aims to analyze power loss resulting from bending in single-mode optical fibers (SMF) to assess the impact on optical signal quality. Five distinct SMF types were simulated using OptiFiber software at wavelengths of 1310 nm and 1550 nm, with bending radii varying from 20 – 46 mm in increments of 2 mm. The results demonstrate that power attenuation in optical fibers is affected by the wavelength of operation and bend radius. At a wavelength of 1310 nm, the highest material loss was recorded in SMF-28 at 0.0125 dB/km, whereas at 1550 nm, SMF-28 exhibited the highest material loss of 31.963 dB/km. Moreover, an increase in bending radius results in a reduction of bending losses, while a decrease in bending radius leads to a significant increase in losses. These insights contribute to the development of improved fiber optic cable designs by advocating the use of enhanced protective shielding to mitigate bending-induced signal degradation.
Simulation-based performance evaluation of reconfigurable intelligent surface (RIS)-assisted non-orthogonal multiple access (NOMA) networks Precious, Ikoko; Shaka, Samuel Oghenemega; Ogherohwo, Enoh Pius; Olisenekwu, Cletus; Precious, Oyibo Dafe
Science, Technology, and Communication Journal Vol. 6 No. 1 (2025): SINTECHCOM Journal (October 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v6i1.326

Abstract

The integration of reconfigurable intelligent surfaces (RIS) into non-orthogonal multiple access (NOMA) networks presents a promising solution to the persistent interference and inefficiency challenges of modern wireless communication systems. This study investigates the impact of RIS on the performance of downlink NOMA networks using a simulation-based approach in MATLAB Simulink. The objective is to evaluate how RIS can enhance signal quality, reduce bit error rate (BER), improve spectral and energy efficiency, and minimize latency in densely connected environments. The methodology involves modeling a system with a base station, multiple users, and a RIS layer, analyzing various RIS configurations such as the number of reflecting elements and user distances ranging from 200 m to 1000 m. Results show that RIS-assisted NOMA significantly boosts signal-to-interference-plus-noise ratio (SINR) across all user pairs, achieving an average SINR gain of 6 dB e.g., SINR for users at 200 m improved from 12.5 dB to 18.7 dB. Similarly, BER dropped by up to 80%, spectral efficiency increased by 1 bps/Hz, and energy efficiency rose by 35%. Furthermore, outage probability reduced by more than 50%, and latency improved by approximately 3ms on average. These findings demonstrate the capacity of RIS to create a smart radio environment that overcomes path loss and interference bottlenecks, offering a scalable, energy-efficient, and low-latency solution for next-generation wireless networks.
Impact of differential group delay and environmental factors on signal quality in multimode fiber using NRZ and QAM modulation Precious, Oyibo Dafe; Shaka, Samuel Oghenemega; Ogherohwo, Enoh Pius; Olisenekwu, Cletus; Roseline, Agbosa Tobore; Agbajor, Godwin Kparobo
Science, Technology, and Communication Journal Vol. 6 No. 1 (2025): SINTECHCOM Journal (October 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v6i1.327

Abstract

This study investigates the effects of polarization mode dispersion (PMD) on high-speed multimode fiber (MMF) optical communication systems, focusing on how differential group delay (DGD) and environmental conditions such as temperature and humidity influence signal quality. The research was conducted in Abuja, Nigeria, using two modulation formats—non-return-to-zero (NRZ) and quadrature amplitude modulation (QAM). Experimental measurements were carried out over fiber lengths ranging from 1 km to 38 km, and data rates from 15 Gbps to 240 Gbps. Key performance metrics such as bit error rate (BER), jitter, and signal-to-noise ratio (SNR) were analyzed in relation to DGD under varying environmental conditions. Results showed that DGD increased from 0.136 ps to 2.78 ps for NRZ and from 0.058 ps to 2.24 ps for QAM across the tested fiber lengths. Corresponding BER values for NRZ ranged from 1.18 × 10-7 to 1.35 × 10-7, while QAM showed slightly better performance with BER values between 1.18 × 10-7 and 1.29 × 10-7. Jitter rose from 4.26 ps to 31.20 ps in NRZ and from 4 ps to 33.54 ps in QAM. SNR values declined as DGD increased, with NRZ dropping from 34.59 dB to 54.56 dB and QAM from 34.83 dB to 52.90 dB. Environmental factors also played a role; temperature increases from 28.34°C to 29.90°C and humidity from 53.1% to 59.5% led to significant increases in DGD. The findings confirm that PMD, though less dominant in MMF than modal dispersion, still significantly affects signal quality in long-distance and high-speed MMF systems. QAM demonstrated greater resilience to PMD compared to NRZ. This study highlights the need for effective dispersion management and modulation format optimization in designing robust optical networks for environmentally dynamic regions like Abuja.
Science communication and outreach with music from plants and phytoacoustics Cannarella, Carmelo
Science, Technology, and Communication Journal Vol. 6 No. 1 (2025): SINTECHCOM Journal (October 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v6i1.329

Abstract

Integrating innovative methods in scientific communication is essential to stimulate interest in science in particular in children and young people. Music originated from electric conductivity (EC) of plants seems to be an effective tool for translating complex scientific concepts into simple and engaging sensory experiences and to underline the potential of music for sustainability transformation. Plant-generated music, through immersive sound experiences and promoting active learning, makes scientific concepts more accessible stimulating curiosity, motivation and interest in scientific research and environmental issues. Many studies confirmed the effectiveness of non-formal approaches in science dissemination and the experiences made at the Institute for Biological Systems of the National Research Council of Italy (CNR-ISB) highlight how music generated from EC of plants and phytoacoustics may encourage scientific and sustainability awareness and a multidisciplinary vision of natural sciences.
Comparative electrical impedance analysis of blood in normal and diabetes mellitus patients under fasting and postprandial conditions Widodo, Chomsin Sulistya; Khoriyanto, Farid; Retnaningtyas, Ekowati
Science, Technology, and Communication Journal Vol. 6 No. 1 (2025): SINTECHCOM Journal (October 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v6i1.330

Abstract

Type 2 diabetes mellitus (T2DM) alters blood biophysics, yet most bioelectrical impedance spectroscopy (BIS) studies examine only glucose and overlook hematological or morphological factors. This comparative study analyzed venous blood samples from normoglycemic individuals (n = 5) and type 2 diabetes mellitus (T2DM) patients (n = 5) under fasting and postprandial conditions. Assessments included glucose, hemoglobin, complete blood count, erythrocyte morphology, and wide-band BIS (100 Hz – 100 kHz). T2DM patients consistently showed higher impedance than controls, with partial reductions postprandially but clear intergroup separation. Morphological analysis revealed an increased number of abnormal erythrocytes, including schistocytes, teardrops, and elliptocytes, consistent with membrane remodeling and hemorheological disturbance. Wide-band BIS detected frequency-dependent signatures shaped by glucose, hemoglobin, membrane capacitance, and cytoplasmic resistance. By integrating biochemical, hematological, and morphological data, this study established a multidimensional electrohematological profile of diabetes. Including both fasting and postprandial states addressed a key gap in previous BIS work and emphasized the clinical relevance of postprandial variability. These findings highlight BIS as a promising, non-invasive adjunct for diabetes monitoring, with translational potential for hybrid diagnostic strategies, wearable sensors, and point-of-care technologies.
Design and optimization of square SRR metamaterial-based microstrip antenna for wideband biomedical sensing Saktioto, Saktioto; Angraini, Cici Yana Tasya; Soerbakti, Yan; Rini, Ari Sulistyo; Syamsudhuha, Syamsudhuha; Anita, Sofia
Science, Technology, and Communication Journal Vol. 6 No. 1 (2025): SINTECHCOM Journal (October 2025)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v6i1.331

Abstract

The continuous advancement in wireless biomedical technology necessitates the development of compact, high-performance antennas capable of operating across a wide frequency range. In this context, this study reports the design and optimization of a square split-ring resonator (SRR) metamaterial-based microstrip antenna to enhance bandwidth and gain characteristics for wideband biomedical sensing. The proposed metamaterial, composed of one to four square SRR unit cells, was modeled using copper patches on an FR-4 substrate with a dielectric constant of 4.3 and simulated in CST Studio Suite 2019 over a frequency range of 0.009 – 9 GHz. The electromagnetic behavior of the structure was analyzed through S-parameter characterization, and the Nicolson–Ross–Weir (NRW) retrieval method was applied to extract the effective constitutive parameters, including relative permittivity, relative permeability, and refractive index. The optimized four-cell SRR configuration demonstrated double-negative (DNG) characteristics, exhibiting a relative permittivity of -153.65, a relative permeability of -8.85, and a refractive index of -9.48, thereby confirming the negative-index properties essential for enhanced electromagnetic field confinement and energy concentration. Integration of the optimized metamaterial into the microstrip antenna structure yielded significant performance improvement, achieving a return loss of -48.31 dB, bandwidth of 4.37 GHz, and gain of 2.23 dBi. These results substantiate that the square SRR metamaterial contributes to superior impedance matching and field localization, making the proposed antenna architecture highly promising for wideband biomedical sensing and potential internet of things (IoT) healthcare implementations.

Page 8 of 9 | Total Record : 85

 5   6   7   8   9 

Filter by Year

2020 2025


Reset
Filter By Issues
All Issue Vol. 6 No. 1 (2025): SINTECHCOM Journal (October 2025) Vol. 5 No. 3 (2025): SINTECHCOM Journal (June 2025) Vol. 5 No. 2 (2025): SINTECHCOM Journal (February 2025) Vol. 5 No. 1 (2024): SINTECHCOM Journal (October 2024) Vol. 4 No. 3 (2024): SINTECHCOM Journal (June 2024) Vol. 4 No. 2 (2024): SINTECHCOM Journal (February 2024) Vol. 4 No. 1 (2023): SINTECHCOM Journal (October 2023) Vol. 3 No. 3 (2023): SINTECHCOM Journal (June 2023) Vol. 3 No. 2 (2023): SINTECHCOM Journal (February 2023) Vol. 3 No. 1 (2022): SINTECHCOM Journal (October 2022) Vol. 2 No. 3 (2022): SINTECHCOM Journal (June 2022) Vol. 2 No. 2 (2022): SINTECHCOM Journal (February 2022) Vol. 2 No. 1 (2021): SINTECHCOM Journal (October 2021) Vol. 1 No. 3 (2021): SINTECHCOM Journal (June 2021) Vol. 1 No. 2 (2021): SINTECHCOM Journal (February 2021) Vol. 1 No. 1 (2020): SINTECHCOM Journal (October 2020) More Issue