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All Journal POSITRON Jurnal Sains dan Pendidikan Fisika BERKALA SAINSTEK Berkala Fisika Indonesia : Jurnal Ilmiah Fisika, Pembelajaran dan Aplikasinya PROtek : Jurnal Ilmiah Teknik Elektro JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Jurnal Elektronika dan Telekomunikasi Jambura Physics Journal Dedication : Jurnal Pengabdian Masyarakat Madaniya Lumbung Inovasi: Jurnal Pengabdian Kepada Masyarakat Jurnal Kolaboratif Sains Inovasi Fisika Indonesia (IFI) Dedication : Jurnal Pengabdian Masyarakat International Journal of Research and Community Empowerment Dedikasi: Journal of Community Engagement and Empowerment JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah)
Yantidewi, Meta
Universitas Negeri Surabaya
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Socialization and Training on Processing LDPE (Low-Density Polypropylene) Plastic Waste into Paving Blocks Agustinur, Satya Cantika; Basmalah, Mazaya; Novianti, Eni; Lestari, Emilia Dwi; Martila, Lenny Intan; Putri, Rahadian Dwi Oktavia; Yantidewi, Meta; Deta, Utama Alan
International Journal of Research and Community Empowerment Vol. 1 No. 1 (2023): Febuary 2023
Publisher : Mitra Edukasi dan Publikasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58706/ijorce.v1n1.p14-21

Abstract

The increasing amount of waste in Indonesia, especially in Surabaya, is a severe problem that must be resolved immediately. The amount of plastic waste in the city of Surabaya is one of the causes of damage to the environment. So that the plastic waste must be processed so that it can be reduced. Surabaya State University KKN students made this problem the basis for implementing the Socialization and Training of Plastic Waste Processing Types of LDPE (Low-Density Polypropylene) into Paving Blocks. The purpose of this activity is as an effort to reduce the amount of plastic waste and provide alternative new jobs for the community. This activity applies the lecture method, question and answer, simulation and practice. The action begins with the opening and filling out of the pre-test, then continues with filling in the material, making simulations, and the activity ends with closing and filling in the post-test. The pre-test and post-test assessments results showed that the participant's knowledge of the material was still classified as "low" with an average pre-test score of 52.40% and an increase in knowledge of the material as indicated by the post-test average score of 87 .27%. The activity concludes that participants experience an increase in knowledge and understanding of handling plastic waste into paving blocks and have knowledge about tools, materials, and processing methods to be applied in everyday life.
Literature Review: Air Oxygen Level Monitoring System Agustinur, Satya Cantika; Khalifa, Khaled Issa; Yantidewi, Meta; Deta, Utama Alan
International Journal of Research and Community Empowerment Vol. 1 No. 2 (2023): August 2023
Publisher : Mitra Edukasi dan Publikasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58706/ijorce.v1n2.p62-70

Abstract

Oxygen is a very important gas for humans. The need for oxygen around the plant is very low because the exhaust gas from various factories often becomes pollutants, one of which is the cement industry. The oxygen content needs to be known so that the level of vigilance of workers and the community is higher. For this reason, it is necessary to make a monitoring device for oxygen content. In this view will be discussed several gas sensors, especially oxygen sensors. In addition, Arduino microcontrollers and Raspberry Pi microprocessors were also discussed. The goal is to be able to determine the type of oxygen sensor as a detector of oxygen levels in the air. The discussion of microcontrollers and microprocessors is also a determinant of the motherboard connected to the oxygen sensor. Thus, the explanation of this review can be used to develop a monitoring system for oxygen content in the air.  The research method used is in the form of literature studies. Literature study is the process of finding research data or information by reading scientific journals, reference books, and articles about oxygen content monitoring devices. This tool functions as a gas analyzer by choosing the MQ-135 sensor as an oxygen sensor because it is more affordable and easy to obtain which is supported by the Raspberry Pi device.
Pelatihan Penggunaan Fitur Kesehatan Digital Untuk Mencegah Kecanduan Gadget Pada Anak-Anak Zakaria, Aminudin; Safitri, Afaurina Indriana; Pertiwi, Nadila Wahyu; Febrianto, M. Aflah Rizqi; Alhusni, Hanan Zaki; Mahtari, Saiyidah; Yantidewi, Meta
Dedikasi: Journal of Community Engagement and Empowerment Vol. 1 No. 1 (2023): June 2023
Publisher : Mitra Edukasi dan Publikasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58706/dedikasi.v1n1.p22-27

Abstract

Teknologi mengalami perkembangan yang sangat pesat ketika memasuki abad ke-20 serta memberikan dampak besar berupa perubahan dalam kehidupan manusia. Salah satu hal yang mampu memberikan perubahan besar dalam kehidupan manusia ialah gadget. Gadget merupakan barang yang memiliki kecanggihan memuat berbagai macam aplikasi serta menyediakan hal yang menjadi kebutuhan manusia. Di sisi lain, kemajuan teknologi berdampak pada perkembangan gadget tersebut memberikan dampak dalam kehidupan manusia, terutama bagi tumbuh kembang anak yaitu secara tidak langsung mampu memengaruhi kesehatan tubuh manusia, merubah sikap social anak, serta mampu menurunkan jiwa kreativitas siswa. Oleh karena itu, penulis menggagas kegiatan sosial dengan judul “Pelatihan Penggunaan Fitur Kesehatan Digital untuk Mencegah Kecanduan Gadget pada Anak-Anak”. Tujuan dari penulisan karya ini adalah untuk meningkatkan kesadaran orang tua serta anak agar bijak dalam menggunakan gadget. Metode penulisan yang digunakan dalam karya tulis ilmiah ini adalah deskriptif kuantitatif, dengan teknik pengumpulan data berupa kuisioner untuk memperkuat gagasan yang diajukan. Pada kuesioner, dapat dilihat masih rendahnya kesadaran masyarakat akan bahaya penggunaan gadget yang berlebihan serta pengetahuan fitur kesehatan untuk monitoring dan control penggunaan gadget. Dapat diketahui sebanyak 90% peserta dapat memasang fitur kesehatan digital dan timer aplikasi. 10% belum dikarenakan smartphone yang digunakan masih menggunakan sistem operasi dibawah android 8.1.
Pengukuran Koefisien Muai Volume Minyak Nabati dan Air Berdasarkan Relasi Linear Antara Perubahan Volume dan Perubahan Temperatur Yantidewi, Meta; Prastowo, Tjipto; Arief, Alimufi
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 2 No. 1 (2018): JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) - May 2018
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v2i1.160

Abstract

The objective of this research was to determine the volume expansion coefficient of vegetable oil and water as the effective way to study the fluids’ properties when they are heated. The vegetable oil used in this research is the unused vegetable oil of Filma, while the water used in this study is distilled water. The main instrument in this study is the dilatometer which works based on the principle of fluids expansion. The research methods adopted the methods of the previous researchers, in which the experiment of fluids volume expansion had been conducted in two stages for each fluids (in this case, the fluids were vegetable oil and water). The first stage was heating fluids indirectly through absorbed and distributed heat by an amount of water inside the boiling jug. In the second stage, the heat source was stopped and fluids were allowed to continue expanding in volume due to the rising temperature before the fluids finally experiencing volume contraction due to the decrease in temperature. When the cooling process was carried out, observation and recording of data of fluid column length in glass pipe as a function of temperature were held. Based on those data, the changes in fluids volume due to the cooling process could be estimated. By utilizing the linear relation between volume change and temperature change, the volume expansion coefficient values of vegetable oil and water were (7,2 ± 0,2) x 10-4/0C and (3,2 ± 0,2) x 10-4/0C within the limits of the accuracy of the measuring instrument used in the study.
Cardiac Imaging with Electrical Impedance Tomography (EIT) using Multilayer Perceptron Network Ristyawardani, Amelia Putri; Baidillah, Marlin Ramadhan; Adityawarman, Yudi; Busono, Pratondo; Rachmadi, Mochamad Adityo; Yantidewi, Meta; Rahmawati, Endah
Jurnal Elektronika dan Telekomunikasi Vol 25, No 1 (2025)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jet.705

Abstract

This research explores the enhancement of Electrical Impedance Tomography (EIT) for cardiac imaging using Multilayer Perceptron (MLP) networks, focusing on supervised and semi-supervised learning approaches. Using synthetic thoracic datasets simulating dynamic cardiac and respiratory conditions, the study demonstrates that supervised learning achieves lower mean squared error (MSE) values (minimum 4.76) and more stable predictions compared to semi-supervised learning (minimum MSE 5.08). However, semi-supervised learning excels in edge accuracy and noise reduction, particularly in regions with sharp conductivity gradients, making it viable for scenarios with limited labeled data. Dropout regularization at 0.3 provided optimal balance, enhancing model generalization and robustness. While supervised learning outperformed semi-supervised methods in overall accuracy, the latter showed potential for cost-effective and scalable applications in EIT-based cardiac imaging. These findings suggest that integrating advanced machine learning with EIT can improve diagnostic accuracy and enable efficient use of sparse labeled data, paving the way for future optimizations and clinical applications.
Carbon Monoxide (CO) Level Measurement Using Internet of Things (IoT) Based Drone with NodeMCU ESP32 Trisnanti, Sefrina Putri; Yantidewi, Meta; Deta, Utama Alan
PROtek : Jurnal Ilmiah Teknik Elektro Vol 11, No 3 (2024): Protek: Jurnal Ilmiah Teknik Elektro
Publisher : Program Studi Teknik Elektro Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/protk.v11i3.6237

Abstract

Carbon monoxide (CO) is a dangerous gas with no odor, color, or taste and can easily mix with other air around it. This study aims to design and determine the results of measuring CO levels using a drone integrated with an MQ-7 gas sensor and an IoT-based ESP32 nodeMCU by manipulating the time and height of measuring CO levels. The method used is data acquisition in the form of a data retrieval process from the MQ-7 sensor programmed with the ESP32 nodeMCU via the ThingSpeak web.  The results of measurements of CO levels in Ketintang, Surabaya air quality in the medium category at 07.00-11.00 WIB and good at 15.00 WIB. Measurement at 07.00 WIB CO levels are higher than at 11.00 WIB and 15.00 WIB. This can occur because the use of motorized vehicles and the process of burning waste in households is denser. Most of these activities are carried out close to the ground so that the higher the altitude in measuring CO levels, the lower the CO levels detected. Other factors that affect CO levels are temperature, wind speed, and weather when taking measurements. Based on the results of the study, it can be concluded that hours and altitude affect the CO levels produced.
Analisis Pengaruh Variasi Fiber Doped Amplifier dan Panjang Gelombang Laser terhadap Optical Power pada Perancangan Sistem FMCW LiDAR: Analysis of the Effect of Variations in Doped Fiber Amplifier and Laser Wavelength on Optical Power in FMCW LiDAR System Design Ramadani, Riski; Yantidewi, Meta; Firdaus, Rohim Aminullah; Afiyah Nikmah
Jurnal Kolaboratif Sains Vol. 7 No. 5: MEI 2024
Publisher : Universitas Muhammadiyah Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56338/jks.v7i5.5267

Abstract

Frequency Modulated Continuous Wave (FMCW) LiDAR merupakan teknologi pendeteksian objek dengan teknik memodulasi frekuensi sinar laser secara kontinu. FMCW LiDAR memiliki kelebihan dalam mendeteksi objek karena dapat menghasilkan pendeteksian objek secara akurat. Salah satu paramater yang berperan dalam pendeteksian sistem ini adalah optical power. Namun optical power dapat berkurang karena ketidaksesauian kombinasi fiber doped amplifier dengan panjang gelombang laser sehingga pada penelitian ini dilakukan pengukuran optical power secara simulasi terhadap berbagai jenis fiber doped amplifier dan panjang gelombang laser. Hasil penelitian menunjukan bahwa jenis Holmium Doped Fiber Amplifier (HDFA) mengeluarkan optical power yang lebih besar dibandingkan jenis fiber doped amplifier lainnya, yakni sebesar 20,02 mW. Selain itu, panjang gelombang 1550 nm menghasilkan keluaran optical power yang optimal diberbagai jenis fiber doped amplifier. Pada penelitian ini semua jenis fiber doped amplifier dan panjang gelombang laser menghasilkan frekuensi beat sebesar 20 MHz dan objek terdeteksi pada jarak 100 meter.
Analisis Kalibrasi Sensor BME280 dengan Pendekatan Regresi Linear pada Pengukuran Temperatur, Kelembaban Relatif, dan Titik Embun : BME280 Sensor Calibration Analysis with Linear Regression Approach for Temperature, Relative Humidity and Dew Point Measurements Vonie Rachmawati, Arum; Dzulkiflih, Dzulkiflih; Yantidewi, Meta
Jurnal Kolaboratif Sains Vol. 7 No. 5: MEI 2024
Publisher : Universitas Muhammadiyah Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56338/jks.v7i5.5272

Abstract

Penelitian kalibrasi sensor BME280 dengan pendekatan regresi linear bertujuan untuk mennetukan tingkat akurasi dan ketelitian dari parameter temperatur, kelembaban relatif, dan titik embun dengan thermohygormeter digital sebagai referensi. Kalibrasi dengan pendekatan regresi linear memiliki sifat yang relatif sederhana, namun efektif dalam memperbaiki ketidakakuratan pengukuran. Kalibrasi dilakukan diruangan tertutup dan ber-AC dengan pengaturan temperatur AC yang berbeda. Setelah kalibrasi dilakukan pengambilan data dengan temperatur AC yang tetap bertujuan untuk menentukan tingkat akurasi dan ketelitian sensor. Persamaan regresi linear hasil kalibrasi akan diterapkan pada program sensor BME280 yang dapat memberikan nilai sensor mendekati nilai pengukuran sebenarnya. Hasil penelitian menunjukkan bahwa tingkat ketelitian dalam pengukuran temperatur, kelembaban relatif, dan titik embun setelah kalibrasi sensor BME280 cukup tinggi, menunjukkan akurasi yang baik dalam pengukuran tersebut. Tingkat akurasi dan ketelitian, keduanya menunjukkan nilai mendekati 100%.
Pemberdayaan Masyarakat Melalui Eco-Enzyme untuk Pengelolaan dan Degradasi Limbah Cair Industri Tempe di Desa Sukorejo Trenggalek Firdaus, Rohim Aminullah; Rahmawati, Endah; Dzulkiflih, Dzulkiflih; Khoiro, Muhimmatul; Putri, Nugrahani Primary; Yantidewi, Meta
Lumbung Inovasi: Jurnal Pengabdian kepada Masyarakat Vol. 10 No. 4 (2025): December
Publisher : Lembaga Penelitian dan Pemberdayaan Masyarakat (LITPAM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/6eyqtz37

Abstract

Limbah cair industri tempe memiliki beban organik tinggi (COD, BOD, TSS) yang berpotensi menurunkan kualitas lingkungan jika dibuang tanpa pengolahan. Sebagian besar pelaku UMKM tempe di pedesaan belum memiliki akses terhadap teknologi pengolahan yang murah dan sederhana, sehingga diperlukan pendekatan alternatif berbasis partisipasi masyarakat. Kegiatan Pengabdian kepada Masyarakat (PKM) ini bertujuan memberdayakan warga Desa Sukorejo, Trenggalek dalam pengelolaan limbah cair menggunakan eco-enzyme hasil fermentasi sampah organik rumah tangga. Berbeda dari pendekatan konvensional, kegiatan ini menerapkan model partisipatif dengan pembuatan dan penerapan eco-enzyme berbasis rumah tangga yang terintegrasi dengan monitoring masyarakat, sebuah pendekatan yang belum umum diterapkan pada pengelolaan limbah tempe skala kecil. Metode meliputi pemetaan pelaku usaha, sosialisasi, pelatihan pembuatan eco-enzyme (rasio 3:1:10; fermentasi ±90 hari), penyusunan SOP aplikasi (1–5% v/v), dan pendampingan uji sederhana (pH, bau, kekeruhan). Program diikuti 18 peserta dan menghasilkan kelompok pengelola serta unit percontohan. Observasi menunjukkan penurunan bau dan kekeruhan dalam 24–48 jam serta peningkatan pengetahuan peserta. Evaluasi respon peserta menunjukkan kategori sangat baik (rata-rata >90%). Kegiatan ini efektif meningkatkan kapasitas masyarakat dan menunjukkan potensi eco-enzyme sebagai solusi awal pengolahan limbah cair tempe yang murah dan berkelanjutan. Community Empowerment Through Eco-Enzymes for the Management and Degradation of Liquid Waste from Tempeh Industries in Sukorejo Village, Trenggalek Abstract Liquid waste from tempeh production contains high organic loads (COD, BOD, TSS) that can degrade environmental quality if discharged without proper treatment. Most small-scale tempeh producers in rural areas lack access to simple and low-cost treatment technologies, necessitating an alternative approach grounded in community participation. This Community Service Program (PKM) aims to empower residents of Sukorejo Village, Trenggalek in managing liquid waste using eco-enzymes produced from the fermentation of household organic waste. Unlike conventional approaches, this program adopts a participatory model involving the household-based production and application of eco-enzymes integrated with community monitoring—an approach that is rarely implemented for small-scale tempeh wastewater management. The methods included stakeholder mapping, awareness-building activities, training on eco-enzyme production (3:1:10 ratio; ± 90-day fermentation), preparation of application SOPs (1–5% v/v), and facilitation of simple testing (pH, odor, turbidity). The program involved 18 participants and resulted in the formation of a management group and a pilot demonstration unit. Observations indicated reductions in odor and turbidity within 24–48 hours, alongside improved participant knowledge. Participant response evaluations showed excellent results (average >90%). This program effectively enhanced community capacity and demonstrated the potential of eco-enzymes as a low-cost and sustainable preliminary solution for treating liquid waste from tempeh production.
Three-Dimensional Soliton Propagation in Ruby for High-Stability Optical Communication Yantidewi, Meta; Firdaus, Rohim Aminullah; Khoiro, Muhimmatul; Winarno, Nanang; Ramadani, Riski; Nikmah, Afiyah; Alhusni, Hanan Zaki
POSITRON Vol 16, No 1 (2026): Vol. 16 No. 1 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v16i1.93213

Abstract

Optical communication in digitalisation is a significant catalyst in supporting high-speed and large capacity data transmission. However, optical communication applications face substantial challenges, such as energy loss, dispersion effects, and signal stability over long transmission distances. One material that has the potential to overcome these problems is ruby due to its nonlinear characteristics. This research work numerically investigates soliton propagation in ruby material analysis as a Nonlinear Schrödinger Equation numerical modelling and three-dimensional visualisation with Cubic B-Spline, modified Korteweg-de Vries-Zakharov-Kuznetsov, and Boussinesq methods to understand ruby material characteristics more deeply. The simulations show that the soliton waveform remains stable during propagation, with its amplitude confined within approximately -1.05 to 0.35, indicating robust shape preservation under anisotropy and temperature variations. like most previous studies that are limited to one or two dimensional modelling or to dispersive fibre media, this study implement a full 3D NLSE framework tailored to the physical properties of ruby. The results show that both numerical modelling and three-dimensional visualisation indicate that ruby material can maintain the soliton waveform during propagation. This finding suggests that ruby has the potential to be applied in optical communication systems with high stability to support long-distance data transmission.
Co-Authors Abu Zainuddin Adikuasa, M Biyadihie Adityawarman, Yudi Afiyah Nikmah Agustinur, Satya Cantika Alhusni, Hanan Zaki Alim, Andu Mahdy ALIMUFI ARIEF Alimufi Arief Asandi, Ruhi Baidillah, Marlin Ramadhan Basmalah, Mazaya Binar Kurnia Prahani Dzulkiflih Dzulkiflih Dzulkiflih, Dzulkiflih Endah Rahmawati Endah Rahmawati Fadhilah, Nisa'ul Fahmi, Muhammad Nurul FAJAR SETIAWAN Fathur Rokhman Iskandar Febrianto, M. Aflah Rizqi Firdaus, Rohim Aminullah Frida U. Ermawati Frida Ulfah Ermawati funny qorry ain Imam Sucahyo Imam Sucahyo Imam Sucahyo Indralaksono, Rio Ismi R. Setiaji Khairunnisa, Safira Adara Khalifa, Khaled Issa Khoiro, Muhimmatul Lestari, Emilia Dwi Lydia Rohmawati Martila, Lenny Intan Mita Anggaryani Moh. Ahsanit Taqwim Muhammad Habibbulloh Mutawakkillah, Nainunis Nanang Winarno Natasya, Adinda Nur Nikmah, Afiyah Novianti, Eni Nugrahani Primary Putri Nursifaun Nikmah Pertiwi, Nadila Wahyu Pratondo Busono Putri, Rahadian Dwi Oktavia Rachmadi, Mochamad Adityo Rachmawati, Arum Vonie Ramadani, Riski Riandana, I Made Niantara Ristyawardani, Amelia Putri Rochmania, Alven Rozikin, Muchamad Khoirur Safitri, Afaurina Indriana Saiyidah Mahtari Sita Nurachmah Yurika Syahriannanda, Kinanta Tjipto Prastowo Tjipto Prastowo Trisnanti, Sefrina Putri Ulfa, Khansa Zanadia Utama Alan Deta Vonie Rachmawati, Arum Wati, Jhulinda Nizar Zakaria, Aminudin