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All Journal Voteteknika (Vocational Teknik Elektronika dan Informatika) Jurnal Sains dan Seni ITS Jurnal Reka Lingkungan IPTEK Journal of Proceedings Series WAKTU: Jurnal Teknik UNIPA Jurnal Abdimas PHB : Jurnal Pengabdian Masyarakat Progresif Humanis Brainstorming Jurnal Review Pendidikan dan Pengajaran (JRPP) Jurnal Informatika dan Rekayasa Elektronik Nusantara Science and Technology Proceedings Best : Journal of Applied Electrical, Science and Technology Seminar Nasional Hasil Riset dan Pengabdian (SNHRP) Inovasi Fisika Indonesia (IFI) SinarFe7 Journal FORTEI-JEERI Faraday: Journal of Fundamental Physics, Research, and Applied Science
Akbar Sujiwa
Physics Study Program, Faculty Of Engineering And Science, Pembangunan Nasional “Veteran” Jawa Timur University, Surabaya 60294, Indonesia
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Design and Construction of A Self Balancing Robot using Long Range Control Based on NRF24L01 Sujiwa, Akbar; Suhadata
BEST Vol 5 No 2 (2023): BEST
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/best.vol5.no2.8165

Abstract

At first, robots were created to replace routine human work, requiring a high level of precision, and also to replace humans in dangerous situations. Robots that have the ability to maintain self-balance are called Self Balancing Robots. The Self Balancing Robot is the result of the development of an inverted pendulum model which is positioned on top of a wheeled train. The robot is controlled using a remote control using NRF 24L01 which can be controlled remotely. And to find out the situation in running the robot which is controlled from the remote using To detect the tilt angle of the robot, the MPU6050 sensor is used which is a module that integrates three sensors, namely the gyroscope and accelerometer on three different axes.
Baby Weight And Length Based On Arduino Uno With Combination Of Ultrasonic Sensor Hc-Sr04 And Weight Sensor (Load Cell) Sujiwa, Akbar; Marta, Bayu Tirta; Afif Nuril Musthofa
BEST Vol 6 No 1 (2024): BEST
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/best.vol6.no1.8822

Abstract

Infant development and growth at the age of 0 to 1 year. Babies are easily affected by malnutrition or, if parents ignore the development and growth of the baby. Generally, parents will take their babies to Posyandu or Midwives to have their weight weighed and the length of the baby's body measured. At the time of measuring the baby's body weight and length still using separate and manual measurements. Therefore we need a weighing device that is able to measure the baby's weight and baby's length simultaneously. Then an "Arduino Uno-Based Baby Weight and Length Weighing Device was made by Combining the HC-SR04 Ultrasonic Sensor and the Weight Sensor (Load Cell)" to simplify the process of measuring the baby's weight and length simultaneously and recording the results of these measurements. The benefit of making this tool is that it helps parents to know the growth and development of their babies aged 0 to 1 year. And the purpose of making this tool is to measure the baby's weight and length simultaneously, which in general the process of measuring the baby's weight and length is still not automatic, and still uses analog or digital scales but there is no tool that can measure automatically and simultaneously in the process of measuring the baby's weight and length. From here we submit a research proposal in which the results of this research proposal are expected to contribute well as a first step in our research so that in the process of designing the tool it can work well and be useful for parents and medical personnel
TensorFlow Based AI Training for Translating Indonesian Sign Language (BISINDO) Sujiwa, Akbar; Hasan, Nailul; Aruan, Nenni Mona
BEST Vol 7 No 1 (2025): BEST
Publisher : Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36456/best.vol7.no1.10312

Abstract

Communication is an important aspect of social life, including for deaf people who rely on sign language as their primary means of interaction. However, the limited understanding of sign language in society, especially BISINDO (Bahasa Isyarat Indonesia), is often a barrier to effective communication. This study aims to develop a simple sign language translator system using TensorFlow and Keras-based machine learning technology, as well as image processing support from OpenCV. The system is trained to recognize six basic signs in BISINDO, namely “Halo”, “Nama”, “Saya, “A”, “D”, and “I”, using hand images as training data. Each word is represented by 20 images with variations in horizontal position. The test results show that the system is able to recognize signs with fairly good accuracy under certain conditions, but still has difficulty when faced with variations in hand positions that are different from the training data. This study shows the potential of sign language recognition technology in supporting inclusive communication, as well as the importance of data enrichment and variation in viewpoints in the model training process so that the system can function more optimally in various real conditions.
STUDI KUALITATIF TENTANG TANTANGAN KALIBRASI DAN AKURASI CLAMP METER SEBAGAI ALAT UKUR ENERGI LISTRIK DI PLN PLOSO SURABAYA: PERSPEKTIF MAHASISWA MAGANG FISIKA INSTRUMENTASI Nabilla, Nabilla; Sujiwa, Akbar; Satrio, Eko Nurhadi
Jurnal Review Pendidikan dan Pengajaran Vol. 8 No. 2 (2025): Volume 8 No. 2 Tahun 2025
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jrpp.v8i2.46424

Abstract

Clamp meter termasuk alat pengukur arus listrik yang krusial dalam aktivitas pengawasan energi oleh PT PLN karena keterampilannya untuk mengukur arus tanpa menghentikan rangkaian. Akan tetapi, ketepatan pengukuran alat ini sangat tergantung pada proses kalibrasi yang diterapkan secara berkala dan selaras dengan prosedur. Studi ini dilaksanakan oleh mahasiswa fisika instrumentasi mengacu pada pengalaman magang di PLN, dengan maksud untuk mengidentifikasi tantangan utama pada kalibrasi clamp meter serta menilai pengaruhnya pada akurasi pengukuran. Metode yang diterapkan yaitu kualitatif deskriptif dengan cara pengambilan data dengan cara wawancara, pengamatan, dan dokumentasi. Temuan penelitian mengindikasikan adanya hambatan seperti terbatasnya alat kalibrasi, kurangnya konsistensi dalam pengoperasian kalibrasi rutin, serta rendahnya persepsi teknis dari operator mengenai signifikansi kalibrasi. Hasil ini menegaskan kebutuhan akan pelatihan teknis yang lebih mendalam untuk teknisi lapangan serta pentingnya kerja sama antara lembaga pendidikan dan dunia industri guna memastikan keandalan alat ukur dan meningkatkan kualitas pengukuran di lapangan.  
RANCANG BANGUN BIDAI ORTOPEDI PINTAR BERBASIS 3D PRINTING DENGAN WIRELESS REAL-TIME MICROCLIMATE MONITOR timur, fajar; Rizkiarna, Reffany Choiru; Wardhani, Primasari Cahya; Sujiwa, Akbar; Prasetya, Bayu
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p216-223

Abstract

Abstrak Imobilisasi ortopedi merupakan bagian penting dalam proses penyembuhan patah tulang atau fraktur. Bidai merupakan alat yang digunakan untuk proses imobilisasi patah tulang atau fraktur dan umumnya berbahan dasar gips dan fiberglass. Bidai jenis ini sering menyebabkan komplikasi kulit akibat penumpukan panas dan kelembapan di bawah permukaan bidai. Kondisi mikroklimat dengan suhu dan kelembapan tinggi dapat memicu maserasi kulit, bau tidak sedap, dan infeksi sekunder yang memerlukan intervensi medis. Penelitian ini dilakukan dengan maksud mengembangkan prototipe bidai ortopedi biofungsional berbasis 3D Printing yang dilengkapi modul sensor suhu dan kelembapan yang ditransmisikan secara wireless.  Hasil pengujian menunjukkan bahwa prototipe bidai memiliki kekuatan tekan yang lebih tinggi dibandingkan bidai gips. Uji pemantauan waktu nyata selama dua jam dilakukan pada relawan sehat dengan suhu lingkungan 25 °C menunjukkan bahwa suhu internal bidai berada pada rentang 30–31,2 °C dan kelembapan relatif 64–66%, dengan deviasi ≤1,3% terhadap alat referensi dan nilai p > 0,05 untuk seluruh titik waktu. Fluktuasi suhu dan kelembapan yang diamati mencerminkan dinamika termal fisiologis dan efektivitas ventilasi pada struktur bidai. Prototipe bidai ini menunjukkan kemajuan penting dalam perawatan ortopedi dengan meningkatkan kenyamanan pasien patah tulang, mengurangi komplikasi kulit, dan mengintegrasikan rekayasa biomedik dengan teknologi kesehatan digital.   Abstract Orthopedic immobilization plays a critical role in the healing process of bone fractures. Casts are commonly used to immobilize fractured bones and are traditionally made from materials such as plaster of Paris or fiberglass. However, these conventional casts often cause skin-related complications due to the buildup of heat and moisture beneath the surface. An enclosed microclimate with elevated temperature and humidity can lead to skin maceration, unpleasant odor, and secondary infections that require clinical intervention. The present study aims to develop a biofunctional orthopedic cast prototype fabricated via 3D printing, equipped with embedded temperature and humidity sensors capable of wireless data transmission. Mechanical testing demonstrated that the 3D-printed cast exhibited higher compressive strength compared to traditional plaster-based casts. A two-hour real-time monitoring test was performed on a healthy volunteer in a controlled environment (25 °C). The internal microclimate within the cast ranged from 30 to 31.2 °C with a relative humidity of 64–66%, showing a deviation of no more than 1.3% compared to calibrated reference instruments (p > 0.05 for all time points). The observed fluctuations in temperature and humidity reflect the physiological thermal dynamics of the skin and the effectiveness of the lattice ventilation design. Overall, the developed prototype represents a notable advancement in orthopedic care by improving patient comfort, reducing the risk of skin complications, and integrating biomedical engineering with modern digital health technologies.
PEMODELAN KOMPUTASIONAL SIFAT MEKANIK THIN FILM BERBASIS PEKTIN KULIT DURIAN Rizkiarna, Reffany Choiru; Timur, Fajar; Sujiwa, Akbar; Wardhani, Primasari Cahya
Inovasi Fisika Indonesia Vol. 14 No. 2 (2025): Vol 14 No 2
Publisher : Prodi Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v14n2.p209-215

Abstract

Abstrak Pektin yang diekstrak dari kulit durian merupakan salah satu bentuk pemanfaatan limbah biomassa berpotensi tinggi sebagai material ramah lingkungan, khususnya untuk aplikasi kemasan pangan biodegradable. Pada penelitian ini dilakukan simulasi numerik berbasis COMSOL Multiphysics untuk menganalisis perilaku mekanik film tipis pektin kulit durian di bawah berbagai kondisi pembebanan. Studi dilakukan dengan membangun model tiga dimensi (3D) film tipis, kemudian pemetaan tegangan von Mises, analisis distribusi tegangan, serta evaluasi nilai tegangan maksimum (peak stress), minimum, dan rata-rata. Hasil simulasi menunjukkan distribusi tegangan tidak merata di seluruh volume film, melainkan terkonsentrasi pada tepi dan sudut akibat efek geometri. Nilai peak stress berfluktuasi terhadap waktu dan cenderung meningkat pada siklus pembebanan tertentu, yang berimplikasi pada potensi inisiasi retakan di area kritis. Meskipun demikian, sebagian besar area film masih berada dalam kondisi elastis, sehingga deformasi bersifat reversibel. Analisis ini menegaskan bahwa ketahanan jangka panjang film tipis pektin dipengaruhi oleh kombinasi sifat intrinsik material, kondisi batas, serta variasi pembebanan. Temuan ini memberikan dasar penting bagi pengembangan material kemasan berbasis pektin kulit durian yang lebih andal melalui modifikasi struktur maupun penambahan aditif penguat.   Abstract Pectin extracted from durian rind represents a promising valorization of biomass waste with potential applications as an eco-friendly material, particularly for biodegradable food packaging. In this study, a COMSOL Multiphysics-based numerical simulation was conducted to investigate the mechanical behavior of durian rind pectin thin films under various loading conditions. A three-dimensional (3D) thin-film model was developed, followed by von Mises stress mapping, stress distribution analysis, and evaluation of maximum (peak stress), minimum, and average stress values. The results revealed that stress distribution was not uniform across the film volume but concentrated along the edges and corners due to geometric effects. Peak stress exhibited temporal fluctuations and tended to increase during specific loading cycles, indicating a high probability of crack initiation in critical regions. Nevertheless, the majority of the film remained within the elastic regime, allowing reversible deformation. This analysis highlights that the long-term reliability of durian pectin thin films is strongly governed by the interplay of intrinsic material properties, boundary conditions, and loading variations. The findings provide a scientific basis for further optimization of durian rind pectin films through structural modification or reinforcement additives to enhance their performance as sustainable packaging materials.
The Effect of Inaccurate Electronic Component Values on The Output Frequency Characteristics of Fourth Order Butterworth Type Low-pass Filter Circuits Sujiwa, Akbar; Maniani, Billy Sopater
Faraday: Journal of Fundamental Physics, Research, and Applied Science Vol. 1 No. 1 (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.v1i1.4

Abstract

The low-pass filter opamp circuit is an active electronic circuit used to pass low frequencies. In practice, making this circuit requires active components in the form of an operational amplifier and several passive components such as resistors and capacitors. To obtain the required passive component values, calculations are carried out according to theory, but the results of these calculations sometimes make it difficult for users to find the values ​​for the same components. Components sold on the market do not always exactly match the user's needs, so sometimes these components are replaced with components whose size is close to the calculated value. Therefore, in this research, testing was carried out regarding the effect of inaccurate component values ​​on the filter output characteristics. From the results of this research, it was found that the cut-off frequency decreased by 6.25% and that premature damping occurred at low frequencies at 100 Hz. However, overall this series of filters is still suitable for use.
Implant Design Femur Bone using CAD Computation with Variation in Implant Plate Length Az Zahra, Ladya Cheril; Sudrajat, Oka Akbar; Santika, Arum Sinda; Ernawati, Dira; Sujiwa, Akbar
Faraday: Journal of Fundamental Physics, Research, and Applied Science Vol. 1 No. 1 (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.v1i1.9

Abstract

Femoral fractures are among the most common and severe musculoskeletal injuries, necessitating effective and reliable treatment strategies. This study explores the biomechanical performance of femur implants by evaluating the effects of material selection and implant design using the finite element method (FEM). Three biocompatible materials—titanium alloy Ti-6Al-4V, stainless steel, and PEEK—were analyzed under linear elastic isotropic conditions. Implant designs varied in length (10.02 mm, 13.37 mm, and 15.60 mm) with a fixed head thickness of 3 mm. Simulations assessed stress distribution, deformation, and overall structural performance under physiological loading conditions. Results demonstrated that implant length significantly affects mechanical behavior. The 15.60 mm implants exhibited the most uniform stress distribution and minimal deformation, indicating superior mechanical stability. In contrast, shorter implants (e.g., 10.02 mm) showed increased stress concentrations and deformation, suggesting a higher risk of mechanical failure. Among the materials tested, Ti-6Al-4V outperformed others due to its favorable combination of strength and biocompatibility. The study concludes that longer implants made from titanium alloy provide improved structural integrity, offering safer and more durable options for femoral fracture repair. These findings contribute to the optimization of implant design for enhanced clinical outcomes in orthopedic applications
Sosialisasi Rangkaian Filterisasi Air Berbasis Energi Surya di Desa Plaosan-Lamongan Aruan, Nenni Mona; Sujiwa, Akbar; Timur, Fajar; Puspitasari, Nia Dwi; Isabella, Adinda; Akbar, Musafa
Jurnal Pengabdian Masyarakat Progresif Humanis Brainstorming Vol 8, No 4 (2025): Jurnal Abdimas PHB : Jurnal Pengabdian Masyarakat Progresif Humanis Brainstormin
Publisher : Politeknik Harapan Bersama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30591/japhb.v8i4.9760

Abstract

Pelaksanaan sosialisasi rangkaian filterisasi air berbasis energi surya di desa Plaosan, Lamongan bertujuan mengedukasi masyarakat terkait pentingnya air bersih, dampak air bersih kepada kesehatan serta penerapan teknologi filterisasi rumah tangga yang ramah energi. Materi yang disampaikan meliputi manfaat air jernih dan penjernihan air, sistem filterisasi 4 housing 5 tahap, serta pemanfaatan panel surya sebagai sumber energi. Evaluasi dilakukan melalui pretest dan posttest, yang menunjukkan peningkatan pengetahuan masyarakat dari rata-rata 38.33% menjadi 47.22% dari 25 peserta. Hasil ini membuktikan bahwa metode sosialisasi dengan kombinasi pemaparan, demonstrasi, dan diskusi efektif dalam meningkatkan pemahaman. Warga juga memberikan respon positif, termasuk minat untuk mengadopsi sistem serupa di rumah tangga. Tantangan utama yang teridentifikasi adalah kebutuhan perawatan berkala dan penggantian media filter agar sistem berkelanjutan. Secara keseluruhan, kegiatan ini berkontribusi pada upaya pencapaian Tujuan Pembangunan Berkelanjutan (SDGs) 6 dan 7, khususnya terkait penyediaan air bersih dan pemanfaatan energi terbarukan di wilayah pedesaan.
PENURUNAN KADAR BOD, COD DAN TURBIDITY LIMBAH CAIR INDUSTRI BATIK MELALUI METODE KOMBINASI PRETREATMENT FILTRASI ADSORPSI DAN ELEKTROKOAGULASI Febrianto, Muhammad Akbar; Sujiwa, Akbar; Shofwan, Moch; Majid, Dian
Jurnal Reka Lingkungan Vol 11, No 3 (2023)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekalingkungan.v11i3.258-269

Abstract

AbstrakLimbah cair industri batik pada Industri Batik X di Kampung Batik Jetis, Jln P. Diponegoro, Lemah Putro, Kec. Sidoarjo, Kabupaten Sidoarjo, mengandung zat pencemar seperti BOD dan COD. Sebagai solusi, metode kombinasi Pretreatment Adsorpsi dan Elektrokoagulasi diajukan sebagai alternatif. Penelitian ini bertujuan untuk mengevaluasi efektivitas metode kombinasi tersebut. Untuk proses Pretreatment Adsorpsi, digunakan reaktor model kontinu, sementara Elektrokoagulasi diterapkan dengan sistem batch. Penelitian dilakukan dengan variasi tegangan: 5; 7,5; 10; dan 12,5 V. Hasilnya, metode kombinasi ini berhasil menurunkan kadar BOD, COD, dan Turbiditas pada limbah cair industri batik. Efisiensi terbaik diperoleh pada tegangan 12,5 Volt untuk BOD dengan konsentrasi akhir mencapai 200,5 mg/L (efisiensi 85,19%) dan Turbiditas akhir mencapai 1,25 NTU (efisiensi 99,92%). Sedangkan untuk COD, penurunan optimal tercapai pada tegangan 10 V dengan COD akhir sebesar 445,5 mg/L (efisiensi 87,15%). Kata kunci: Limbah cair industri batik, Pretreatment Adsorpsi, Elektrokoagulasi.AbstractThe wastewater from the batik industry at Industri Batik X in Kampung Batik Jetis, Jln P. Diponegoro, Lemah Putro, Kec. Sidoarjo, Kabupaten Sidoarjo, contains pollutants such as BOD and COD. As a solution, a combination of Pretreatment Adsorption and Electrocoagulation methods is proposed as an alternative. This research aims to evaluate the effectiveness of this combined method. For the Pretreatment Adsorption process, a continuous model reactor was used, while Electrocoagulation was applied with a batch system. The study was conducted with variations in voltage: 5 Volts, 7.5 Volts, 10 Volts, and 12.5 Volts. The results show that this combined method successfully reduced the levels of BOD, COD, and Turbidity in the wastewater from the batik industry. The best efficiency was achieved at 12.5 Volts for BOD, with a final concentration of 200.5 mg/L (85.19% efficiency), and a Turbidity of 1.25 NTU (99.92% efficiency). Meanwhile, for COD, the optimal reduction was reached at 10 Volts, resulting in a final COD concentration of 445.5 mg/L (87.15% efficiency).Keywords: Batik industrial liquid waste, Adsorption Pretreatment, Electrocoagulation.
Co-Authors Adi Winarno Afif Nuril Musthofa Aini, Rasyida Shabihah Zukro Akbar, Musafa Akhmad Solikin Arif, Irfan Aruan, Nenni Mona Atmiasri Az Zahra, Ladya Cheril Dian Majid Dimas Ricky Saputra Dira Ernawati Edi Purwanto Edi Purwanto Endarko Endarko Fajar Timur Febrianto, Muhammad Akbar Hadi Pri Prasetyo Hadiwikarta, Oktavianus Hasan, Nailul Immanuel Siburian Irfan Arif Irwan Puji Raharjo Isabella, Adinda Iwan Santoso Kristianto Wahyu Lestari Maniani, Billy Sopater Marta, Bayu Tirta Moch. Shofwan Mochamad Arif Nurochman Mochamad Arif Nurochman Muhammad Ubaydillah Nabilla Nabilla Nailul Hasan Nenni Mona Aruan Nia Dwi Puspitasari Oktavianus Hadiwikarta Parama Diptya Widayaka Prasetya, Bayu Prasetyo, Hadi Pri Primasari Cahya Wardhani Raharjo, Irwan Puji Reffany Choiru Rizkiarna Risqi Rahmat Dianto Rizkiarna, Reffany C. Rizky Setyobudi Sagita Rochman Santika, Arum Sinda Satrio, Eko Nurhadi Sudrajat, Oka Akbar Suhadata Syahrul Ramadhan Ardiansyah Ubaydillah, Muhammad Widodo Winarno F. Bastari Winarno Fadjar Bastari