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All Journal International Journal of Electrical and Computer Engineering Teknika Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer e-Jurnal Arus Elektro Indonesia ELINVO (Electronics, Informatics, and Vocational Education) Jurnal Keterapian Fisik EMITTER International Journal of Engineering Technology Briliant: Jurnal Riset dan Konseptual JOIV : International Journal on Informatics Visualization JOURNAL OF APPLIED INFORMATICS AND COMPUTING JMM (Jurnal Masyarakat Mandiri) Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) Jurnal Kreativitas PKM AMALIAH: JURNAL PENGABDIAN KEPADA MASYARAKAT Placentum: Jurnal Ilmiah Kesehatan dan Aplikasinya Jurnal Teknik Elektro Uniba (JTE Uniba) Jurnal Abdi: Media Pengabdian Kepada Masyarakat Budimas : Jurnal Pengabdian Masyarakat Jurnal Empathy Pengabdian Kepada Masyarakat Jurnal Nasional Teknik Elektro dan Teknologi Informasi Sewagati Jurnal Rekayasa elektrika Quantum Wellness : Jurnal Ilmu Kesehatan The Indonesian Journal of Computer Science Jurnal Terapi Wicara dan Bahasa Aksi Nyata : Jurnal Pengabdian Sosial dan Kemanusiaan

Tri Budi Santoso

Politeknik Elektronika Negeri Surabaya

Author-ID : 371128

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Dentistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary Other

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Analysis of Channel Coding Performance in OFDM Technique for Underwater Acoustic Communication System Alhamidi, Machmud Roby; Puja Astawa, I Gede; Santoso, Tri Budi
EMITTER International Journal of Engineering Technology Vol 1 No 1 (2013)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24003/emitter.v1i1.5

One way to increase the performance of Orthogonal Frequency Division Multiplexing System (OFDM) system is by adding a channel coding (error correction code) in order to detect and correct errors that occur when sending data.At communication of acoustic underwater channel coding is required because of the characteristics of the channel bottom water is much different compared with the air channel and errors are likely to occur.In this research it was made simulation of acoustic underwater communication system with OFDM applied channel codingin which using Hamming code (7,4) and Hamming code (15,11) that is able to correct one error and detect two errors then BCH code capable to correct two errors for BCH (15,7) and correct 9 errors forBCH (127,64) and Reed Solomon code able to correct two errors for RS (15,11) and correct 8 errors for RS (31,15). Results of the study confirm the better performance when system usesOFDM with BCH Code (127.64) than other codes that are used, starting from 1 decibel (dB) to 3 dB for the performance of BER as10 -3 on Additive Gaussian White Noise (AWGN) channel while at the multipath channel, the performance of Bit Error Rate (BER) got better result on 1 dB up to 8 dB for BER performance as10 -3.Keyword: Underwater, Orthogonal Frequency Division Multiplexing (OFDM), channel coding

Ambient Noise Characterization of Shallow Water Environment Santoso, Tri Budi
EMITTER International Journal of Engineering Technology Vol 3 No 2 (2015)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Understanding of environmental characteristic is a key factor in design of communication system. This paper describes an ambientÂ noise characterization of measurement in the shallow water ofSurabaya bay. The result showed that probability density function (pdf) of ambient noise is close to a Gaussian distribution with the mean of -2.85x10-5 and deviation standard of 9.87x10-4. Validation has been done by using mean square error (MSE) and Bhattacharya distance. Fitting between cdf of measurement result and theory was done by using MSE with the value of and Kolmogorov Smirnov test with the value of 3.9x10-4 and 4.9x10-2 respectively. In the frequency domain analysis, it is showed that in the range of 0 ~ 9 kHz has a deceasing level from -100 until -140 dB. In the frequency of 9 ~ 13.5 kHz, the spectral is flat as like a white. It can be used as a reference in decision of range frequency of underwater acoustic communication systems that will be applied.Keywords: ambient noise, statistical characteristics, underwater acoustic.

Underwater Acoustic Channel Characterization of Shallow Water Environment Santoso, Tri Budi; Widjiati, Endang; Wirawan, Wirawan; Hendrantoro, Gamantyo
EMITTER International Journal of Engineering Technology Vol 6 No 1 (2018)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Understanding of channel propagation characteristics is a key to the optimal design of underwater acoustic communication. Generally, modelling of underwater acoustic channel is performed based on measurement result in certain site at certain times. Different sites might have different characteristics, each of which can generally be described by a model obtained by averaging measurement results at multiple points in the same environment. This paper describes a characterization of the underwater acoustic channel of tropical shallow water in a Mangrove estuary, which has sediment up to 60 cm at the bottom. Such a channel model is beneficial for the design of communication system in an autonomous underwater vehicle, for instance. The measurement result of delay spread parameter from three different points with the distance of 14 ~ 52 m, has various values. The root mean square (RMS) of delay spread ranges between 0.0621 ~ 0.264 ms, and the maximum delay spread varies with the value of 0.187 ~ 1.0 ms. The pdf fitting shows that Rayleigh distribution describes the fading variation more accurately than Nakagami and Ricean.

Automated Monitoring and Control of Public Street Lighting [PSL] with Placement Strategy Using LoRa-Based Web System Faridatun Nadziroh; Haniah Mahmudah; Rahardhita Widyatra Subdibyo; Iwan Kurnianto Wibowo; Lucky Pradigta S.R.; Muarifin; Aries Pratiarso; Tri Budi Santoso
Elinvo (Electronics, Informatics, and Vocational Education) Vol. 10 No. 2 (2025): November 2025 (In-Press)
Publisher : Department of Electronic and Informatic Engineering Education, Faculty of Engineering, UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/elinvo.v10i2.85009

Public Street Lighting (PSL) is essential for road safety at night. A common issue is the lack of routine inspections, leading to potential hazards. Most maintenance still relies on manual on-site visits. This study proposes an automated PSL system using Long-Range (LoRa) communication and a web-based platform to enhance efficiency and monitoring. The system enables optimized brightness control and scheduling, conserving energy and reducing environmental impact. Real-time monitoring and cloud-based data storage allow remote management via a centralized control system. Motion detection and automated lighting adjustments enhance security, while a user-friendly web interface simplifies issue identification and troubleshooting. This system is expected to improve energy efficiency, environmental sustainability, and public safety. Additionally, a placement strategy based on a predefined scheme is necessary for effective implementation.

THE RELATIONSHIP BETWEEN MATERNAL CHARACTERISTICS AND INTRAOPERATIVE HYPOTENSION DURING CESAREAN SECTION USING SPINAL ANESTHESIA Santoso, Tri Budi; Widodo, Widodo; Istiqomah, Nurul; Purwaningsih, Heni
Placentum: Jurnal Ilmiah Kesehatan dan Aplikasinya Vol 12, No 2 (2024): August
Publisher : Program Studi Kebidanan Fakultas Kedokteran Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/placentum.v12i2.93519

Background: The incidence of hypotension as a complication of spinal anesthesia in mothers who gave birth by cesarean section can occur due to various factors such as height, age, weight. The incidence rate in Indonesia in 2017 was 983 cases. In the preliminary study, there were 352 deliveries, of which 108 were delivered by cesarean section using spinal anesthesia techniques. [AF1] Objective: to determine the relationship between maternal characteristics and the incidence of intraoperative hypotension for sectio caesarea using spinal anesthesia at Hospital "A".Research Methods: this study used cross-sectional. The research population of sectio caesarea patients with spinal technique was collected with a total sampling of 46 respondents. The research instrument used medical records. Analysis of the data used in the form of chi-square test at a significance of 5%.Results: The results of the bivariate test showed that there was no relationship between early adulthood (20-29 years) (OR= 0.38; (95% CI= 0.10 to 1.44; p= 0.259); multipara parity (OR= 0.44; (95% CI) = 0.11 to 1.67; p = 0.365) and obesity BMI (OR = 1.59; (95% CI = 0.48 to 5.35; p = 0.650) on the incidence of hypotension in caesarean sectionConclusion: There is no relationship between early adulthood (20-29 years), parity and obesity BMI are risk factors for hypotension in cesarean section.

Co-Authors Achmad Basuki Afifah, Izza Nur Agus Indra Gunawan Ahmad Baihaqi Adi Putro Ahmad Izzudin Aini, Widyati Nur Aji, Rendra Suprobo Amang Sudarsono, Amang Andang Sudarmono Anggraeni, Martianda Erste Anggraini , Martianda Erste Anisa Rizki Julfatwiah Anteti Andinafar Arfianto, Afif Zuhri Ari Wijayanti Ari Wijayanti Aries Pratiarso Aries Pratiarso Ashafidz Fauzan Dianta, Ashafidz Fauzan Ashafidz Fauzan, Ashafidz Budi Aswoyo, Budi Budi, Erindra Cahyanto, Erindra Budi Darmawan, Zakha Maisat Eka Dewi, Florista Dhiyavia, Fuad Dinda Ayu Oktaviasari Dwi Susanto Eko Supriyanto Endang Widjiati Faradisa, Rosiyah Faridatun Nadziroh Faridatun Nadziroh Fathoni, Kholid Fitriana, Azizah Nur Fitriana, Fia Florista Dewi Gamantyo Hendrantoro Haniah Mahmudah Hari Wahjuningrat Suparno Harumi, Linda Hary Octavianto Heni Purwaningsih I Gede Puja Astawa I Gede Puja Astawa I Gede Puja Astawa, I Gede I Nyoman Gunantara Ika Subekti Wulandari Ika Subekti Wulandari, Ika Subekti Izza Nur Afifah Kanthi Suratih Karimatun Nisa Karimatun Nisa’ Khoirotul Aini, Yulistia Kurniajaya, Moga Lucky Pradigta S.R. M. Hafiduddin Machmud Roby Alhamidi, Machmud Roby Mardawia M Panrereng Megasari, Anis Laela Miftachul Huda Miftahul Huda Mike Yuliana Moga Kurniajaya Moh. Zikky, Moh. Mohamad Ridwan Mohamad Ridwan Mohammad Basuki Rahmat, Mohammad Basuki Mr. Arifin Muarifin Muhammad Edy Hidayat Muhammad Hafiduddin Muhammad Kholid Saifulloh Mujahidatul Musfiroh Nadziroh, Faridatun Nailul Muna NIHAYATUS SAADAH Nur Adi Siswandari Nurul Istiqomah Okkie Puspitorini Okkie Puspitorini, Okkie Paramita Eka Wahyu Lestari Prihantono, Prihantono Prima Kristalina Rahardhita Widyatra Subdibyo Rahmaningrum, Ainulia Salsabila Raihan, Dafa Ramadhani, Aura Kamilla Rante, Hestiasari Rena Widyaningtyas Reni Soelistijorini Rini Satiti Sa'adah, Nihayatus Salwadilla, Ika Shafira Sendi Eka Nilasari, Sendi Eka Siswahyudianto Soelistijorini, Reni Sri Mulyani Sri Mulyani Sultan Syahputra Yulianto Supriyatno, Abigael Thea Rahmany Susilowati, Amanda Bintang Thariqo Falsafah Titon Dutono Tri Winarno Tri Winarno Umi Fitria P Valian Yoga Pudya Ardhana Wahyu, Gilang Arya Wibowo, Iwan Kurnianto Widi Sarinastiti Widodo Widodo Wirawan Wirawan Wirawan Wirawan Yoedy Moegiharto Yudha, Kurniawan Try Zainuddin, Muhammad Agus Zikky, Moh

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