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All Journal Scan : Jurnal Teknologi Informasi dan Komunikasi Jurnal IPTEK Journal of Engineering and Scientific Research (JESR) Abdimasku : Jurnal Pengabdian Masyarakat Journal of Computer and Information Systems Ampera Jurnal Jaring SainTek Jumat Keagamaan: Jurnal Pengabdian Masyarakat JEEE-U (Journal of Electrical and Electronic Engineering-UMSIDA) AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Abdi Wina : Jurnal Pengabdian Kepada Masyarakat Universitas Kristen Wira Wacana Sumba Abdimas Mandalika Berkala Ilmiah Biologi JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Jurnal Fisika Faraday: Journal of Fundamental Physics, Research, and Applied Science
Aslam Chitami Priawan Siregar
Universitas Pembangunan Nasional "Veteran" Jawa Timur
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Megengan Sebagai Sarana Persiapan Menuju Bulan Ramadhan Siregar, Aslam Chitami Priawan; Tamimah, Ni'matut
Jumat Keagamaan: Jurnal Pengabdian Masyarakat Vol. 4 No. 3 (2023): Desember
Publisher : LPPM Universitas KH. A. Wahab Hasbullah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32764/abdimasagama.v4i3.4205

Abstract

Megengan is a means of preparing to face the month of Ramadan both physically and mentally. In this community service, three main methods are carried out to improve the preparation of the community in Kramat Jegu Village, Taman District, Sidoarjo Regency for the month of Ramadhan, both physically and mentally. With this megengan event, there are 2 pieces of advice about the importance of the month of Ramadan and 6 moral values ​​in honoring the month of Ramadhan that people in the area get, so that they can make themselves more connected with the Creator, namely Allah SWT.
The Role of the Sumber Nyolo Sacred Natural Site in Plant Conservation and Ecosystem Services Based on Local Wisdom (A Case Study of Sumber Nyolo, Ngenep Village, Karang Ploso, Malang ) Purnomo, Purnomo; Siregar, Aslam Chitami Priawan; Inaku, Awaluddin Hidayat Ramli; Saputra, Syifa
Berkala Ilmiah Biologi Vol 16 No 3 (2025)
Publisher : Fakultas Biologi Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/bib.v16i3.25863

Abstract

Abstract: The Sumber Nyolo Natural Sacred Site (NSS) is an area venerated by the local community and characterized by a distinctive plant community structure resembling a forest landscape. This study aims to analyze the role of the Sacred Natural Site (SNS) in plant conservation and ecosystem services, as well as to examine the cultural values of the local community associated with its existence. The research employed a plot sampling method, consisting of four plots distributed throughout the area, with plot sizes of 20 × 20 m for tree-level vegetation, 10 × 10 m for poles, 5 × 5 m for saplings, and 2 × 2 m for seedlings. Data were analyzed descriptively using the Importance Value Index (IVI), Shannon–Wiener diversity index (H’), Evenness index (E), Simpson’s dominance index (C), and endemism (End). A total of 53 plant species belonging to 26 families were recorded in the NSS. At the tree and sapling levels, Syzygium pycnanthum was the dominant species with the highest IVI values. At the pole level, co-dominance occurred among Bambusa blumeana, Dendrocalamus asper, and Syzygium littorale, while Syzygium littorale was dominant at the seedling level with the highest IVI value compared to other species. The plant community in the NSS is categorized as stable, as indicated by H’ values of 3.43 (trees), 3.17 (poles), 4.45 (saplings), and 2.23 (seedlings). Species distribution was relatively even, with E’ values of 0.60 (trees), 0.49 (poles), 0.74 (saplings), and 0.34 (seedlings). Moreover, the absence of a dominant species was indicated by C values approaching zero. Most of the recorded plants were local species with a high endemism rate of 94%. Vegetation in the NSS provides various ecological services, including regulating, provisioning, and supporting services. In addition, the NSS functions as a socio-cultural center for the local community, serving as the venue for traditional events such as the Bersih Desa ceremony.
Characterization of RF Voltage and Self-Bias under Power Variations in 13.56 MHz RF Sputtering System Aprilia Dewi Ardiyanti; Aslam Chitami Priawan Siregar; Ni’matut Tamimah
Faraday: Journal of Fundamental Physics, Research, and Applied Science Vol. 1 No. 2 (2025): Faraday: Journal of Fundamental Physics, Research, and Applied Science
Publisher : Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/faraday.v1i2.13

Abstract

RF Sputtering has been widely used as a deposition system on thin films. This study examines the impact of input power on RF voltage and self-bias voltage in an RF Sputtering system operating at a frequency of 13.56 MHz. Power variations were carried out in the range of 50 to 150 Watts to observe the changes in voltage produced during the plasma formation process. The experimental results indicate a linear dependency between power and both voltages, with a coefficient of determination (R²) above 0.9 and slope values of 2.86 and 0.96 for the RF voltage and self-bias voltage, respectively. The observed linear correlation indicates that adjusting power regulation can be utilized as an effective control parameter for both voltages, enabling the production of uniform and high-quality thin film deposition.
Comparison of Silver and Aluminum Patches on the Electromagnetic Radiation of a Microstrip Dipole Antenna Aslam Chitami Priawan Siregar; Aprilia Dewi Ardiyanti; Ni’matut Tamimah
Faraday: Journal of Fundamental Physics, Research, and Applied Science Vol. 2 No. 1 (2026): Faraday: Journal of Fundamental Physics, Research, and Applied Science
Publisher : Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/faraday.v2i1.54

Abstract

This paper compares silver (Ag) and aluminum (Al) as patch materials for a microstrip dipole antenna to examine how their electrical conductivities affect electromagnetic radiation performance. Both antennas were designed with identical geometrical and substrate parameters using the Finite-Difference Time-Domain (FDTD) method, varying only the patch material. Simulation results show that the resonant frequencies are 2.4700 GHz for Ag and 2.4649 GHz for Al, with excellent VSWR values 1.0839 and 1.0836 and return loss below –27 dB. Both materials exhibit reflected power below 0.2% and have nearly identical radiated power, namely 0.3647 W for silver (Ag) and 0.3646 W for aluminum (Al). Overall, silver and aluminum demonstrate almost identical radiation characteristics. Silver offers slightly better conductivity, while aluminum provides similar efficiency at lower cost, making it a practical alternative for lightweight and economical microstrip antenna applications.
Peningkatan Literasi Digital Melalui Pelatihan Microsoft Office dan Internet Sehat Bagi Remaja Kristanto, Titus; Priawan Siregar, Aslam Chitami
Abdimas Mandalika Vol 5, No 3 (2026): April
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/am.v5i3.38734

Abstract

Abstract: The development of information technology requires the younger generation to have adequate digital literacy skills to utilize it productively and responsibly. However, some teenagers in Kertajaya Village, Surabaya City, still lack knowledge on how to use office applications and how to use the internet healthily. Therefore, community service activities aim to improve adolescent digital literacy through Microsoft Office and healthy internet use. The community service activity method involves several stages: identifying partner problems, coordinating with the village, creating training modules, implementing training, accompanying participants, and monitoring and evaluating activities. The training activities involved 20 teenagers from junior high and high schools in Kertajaya Village through counseling, demonstrations, direct practice, and mentoring. The results of the activities showed that participants understood how to use Microsoft Word and Microsoft Excel applications and found wise and healthy ways to use the internet. Participants also showed increased confidence in using digital technology to support learning. Overall, the training activities successfully improved participants' digital literacy, both in terms of technical skills and awareness of using the internet productively and positively.Abstrak: Perkembangan teknologi informasi menuntut generasi muda memiliki kemampuan literasi digital yang memadai agar dapat memanfaatkan teknologi secara produktif dan bertanggungjawab. Namun, beberapa remaja di Kelurahan Kertajaya, Kota Surabaya, masih kekurangan pengetahuan tentang cara menggunakan aplikasi perkantoran dan cara menggunakan internet sehat. Oleh karena itu, kegiatan pengabdian masyarakat bertujuan untuk meningkatkan literasi digital remaja melalui Microsoft Office dan penggunaan internet sehat. Metode kegiatan pengabdian melalui beberapa tahap yaitu menemukan masalah mitra, koordinasi dengan pihak kelurahan, membuat modul pelatihan, melaksanakan pelatihan, mendampingi peserta, monitoring dan evaluasi kegiatan. Kegiatan pelatihan melibatkan 20 remaja dari SMP dan SMA di Kelurahan Kertajaya melalui penyuluhan, demonstrasi, praktik langsung, dan pendampingan. Hasil kegiatan menunjukkan bahwa peserta memahami menggunakan aplikasi Microsoft Word dan Microsoft Excel, serta memahami cara bijak dan sehat dalam menggunakan internet. Peserta juga menunjukkan peningkatan kepercayaan diri dalam menggunakan teknologi digital untuk membantu pembelajaran. Secara keseluruhan, kegiatan pelatihan berhasil meningkatkan literasi digital peserta, baik dari segi keterampilan teknis maupun kesadaran menggunakan internet secara produktif dan positif.
Detecting Optical Fiber Wavelength Shifts Induced by Sugar Solution Concentration Using Lagrange Interpolation Ni'matut Tamimah; Aslam C. P. Siregar
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 10 No. 2 (2026)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v10i2.1034

Abstract

Optical fiber can be used as a sensor because changes in the surrounding medium affect light propagation. This study aims to detect changes in the wavelength of light in optical fiber caused by different sugar solution concentrations using Lagrange interpolation. This study uniquely integrates stripped-cladding optical fiber sensing with Lagrange interpolation to estimate unmeasured wavelength responses across varying sugar concentrations using a safe, environmentally friendly sugar solution. The method involved removing the cladding layer of the optical fiber and applying sugar solutions with concentrations from 44.444% to 54.545%. A 589-nm yellow LED was transmitted through the fiber and measured with a spectrometer. The results showed that increasing sugar concentration reduced the wavelength from 555.26 nm to 546.75 nm. Therefore, this method is effective for detecting changes in solution concentration. Contribution to Sustainable Development Goals (SDGs):SDG 4: Quality EducationSDG 8: Decent Work and Economic GrowthSDG 9: Industry, Innovation and InfrastructureSDG 12: Responsible Consumption and Production
Rekonfigurasi Antena Folded Dipole Mikrostrip Berbasis Laser Merah dan Microwave Multifunctional Analyzer (MMA) Aslam Chitami Priawan Siregar; Yono Hadi Pramono; Gatut Yudoyono; Ni’matut Tamimah
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 9 No. 2 (2025): November Edition
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v9i2.4745

Abstract

With the increasing use of communication devices across various regions, antennas with stable signal performance are essential to ensure reliable information transmission. In this study, a microstrip folded-dipole antenna operating in the SHF band was developed using a reconfiguration mechanism based on a 650-nm red laser and metamaterial absorber (MMA). The initial antenna structure was designed and simulated in CST software with a target operating frequency of 9 GHz. Experimental results show that the antenna without a resonator exhibits an operating frequency of 13.77 GHz when the laser is off and 3.15 GHz when the laser is on. When integrated with the resonator, the operating frequencies shift closer to the simulation results, ranging from 15.75 GHz (laser off) to 7.02 GHz (laser on). The return-loss performance also improves with the implementation of the resonator. Without the resonator, the antenna achieves −33 dB return loss in laser-off mode and −34.15 dB in laser-on mode. With the resonator, the return loss values are −21.88 dB (laser off) and −26.61 dB (laser on). These findings indicate that the proposed configuration technique is applicable for outdoor Wi-Fi signal enhancement in the 5 GHz band and as a blind-spot sensing element for automotive radar systems.
Impact of Copper (Cu) and Lead (Pb) Conductive Materials on the Radiation Performance of Printed Circuit Dipole Antennas A. C. P. Siregar; A. D. Ardiyanti; A. R. Hilmi; Y. E. Setiawan; N. Tamimah; E. A. Saputro; Purnomo; A. H. R. Inaku
Journal of Engineering and Scientific Research Vol. 8 No. 1 (2026)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v8i1.239

Abstract

Exploring the Impact of Cd Doping on the Crystal Structure and Electrical Properties of ZnO Using Pymatgen-Based Simulation Aprilia Dewi Ardiyanti; Tanzilal Mustaqim; Allif Rosyidy Hilmi; Yofinda Eka Setiawan; Aslam Chitami Priawan Siregar
Jurnal Fisika Vol. 16 No. 1 (2026): Jurnal Fisika 16 (1) 2026
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v16i1.36257

Abstract

Advances in computing technology are driving the development of advanced materials research. This study aims to model and compare the semiconductor properties of ZnO and ZnO doped with Cd (x=0.5) to form Zn0.5Cd0.5O using a computational approach based on Python Materials Genomics (Pymatgen 3.0) approach within a Python 3.10.18 environment. Modeling was carried out to analyze changes in crystal structure, band gap values, and the correlation between charge carrier concentration and temperature. BSDOS Plotter based on Density Functional Theory (DFT) calculations, was used for energy and Density of States (DOS) graph analysis. The simulation results show that the crystal structure of both materials has a wurtzite lattice shape with angles α = β = 90° and χ = 119°. The band gap value of ZnO is obtained at 3.1 eV, while in Zn0.5Cd0.5O it decreases to 2.7 eV due to the influence of Cd doping which lowers the conduction band energy. The temperature ranges from 500K to 600 K the charge carrier concentration in ZnO increases from 3x10⁵/cm³ to 10⁸/cm³. Meanwhile, the concentrations of electron and hole Zn0.5Cd0.5O increase to 10⁸/cm³ and 7x10⁷/cm.
Temperature-Dependent Elongation Sensitivity of a Silica Singlemode–Multimode–Singlemode Optical Fiber Sensor at 1310 nm Yofinda Eka Setiawan; Aslam Chitami Priawan Siregar; Allif Rosyidy Hilmi; Aprilia Dewi Ardiyanti
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 10 No. 3 (2026)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v10i3.1193

Abstract

The elongation sensor based on the singlemode–multimode–singlemode (SMS) optical fiber structure is an interesting candidate for strain measurement applications, as its optical response is quite sensitive to light propagation changes in the multimode section. Even so, temperature's influence should not be overlooked, as it affects the sensor's response and is a parameter that warrants serious consideration during calibration. Based on this, the study examined the extent to which temperature affects the elongation sensitivity of a silica-based SMS optical fiber sensor, using a 5.4 cm multimode segment tested at a wavelength of 1310 nm. Testing covered three temperature variations (38, 48, and 58 °C), with elongation applied gradually from 0 to 100 µm in 10 µm increments, and each point was repeated 3 times to evaluate short-term repeatability. Changes in optical loss (dB) were used as the main indicator of the sensor's response. The results showed a fairly consistent pattern, optical loss tended to increase with elongation across all three tested temperatures. The linear regression results showed a sensitivity of 0.002388 dB/µm at 38 °C, increasing to 0.002723 dB/µm at 48 °C and reaching 0.003062 dB/µm at 58 °C. The respective R² values were 0.9378, 0.9273, and 0.9346. These values confirming a near-linear relationship between optical loss and elongation within this testing range. When the temperature was raised from 38 to 58 °C, the sensitivity increased approximately 28%. The relatively small standard deviation further supports the sensor's fairly good repeatability. Overall, these results indicate that temperature needs to be incorporated into the calibration process of SMS elongation sensors. However, these findings remain preliminary and apply specifically to the tested configuration, namely a 5.4 cm MMF segment at 1310 nm, within a temperature range of 38–58 °C and elongation of 0–100 µm. Contribution to Sustainable Development Goals (SDGs):SDG 9: Industry, Innovation, and InfrastructureSDG 11: Sustainable Cities and CommunitiesSDG 12: Responsible Consumption and Production
Co-Authors A. D. Ardiyanti A. H. R. Inaku A. R. Hilmi Allif Rosyidy Hilmi Allif Rosyidy Hilmi Aprilia Dewi Ardiyanti Aprilia Dewi Ardiyanti Aprilia Dewi Ardiyanti Danang Haryo Sulaksono, Danang Haryo E. A. Saputro Gatut Yudoyono Inaku, Awaluddin Hidayat Ramli Ni’matut Tamimah Purnomo Purnomo Purnomo Saputra, Syifa Tanzilal Mustaqim Titus Kristanto Y. E. Setiawan Yofinda Eka Setiawan Yofinda Eka Setiawan Yono Hadi Pramono