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All Journal International Journal of Reconfigurable and Embedded Systems (IJRES) INTEK: Jurnal Penelitian Jurnal Teknologi Elekterika
Umar, Nuraeni
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Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering

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Pemodelan Single-Input Single-Output (SISO) Berbasis OFDM-Cooperative Sirmayanti, Sirmayanti; Umar, Nuraeni; Halide, Lidemar; Sulaeman, Sulaeman
Jurnal Teknologi Elekterika Vol 13, No 2 (2016): Nopember
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (366.729 KB) | DOI: 10.31963/elekterika.v13i2.985

Abstract

Komunikasi Single-Input Single-Output (SISO) pada dasarnya terdiri atas penggunaan pemancar (Tx) dan penerima (Rx) masing-masing untuk satu buah sistem penyambungan. Cooperative wireless merupakan konsep konektivitas eksis yang terjangkau signal oleh setiap perangkat Tx-Rx lain yang memiliki fungsi sama. Untuk mengandalkan pengoperasian sistem multicarrier maka digunakan Orthogonal Frequency Division Multiplexing (OFDM) agar bandwidth yang tersedia setelah spektrum dibagi menjadi sub band menjadi lebih hemat. Tulisan ini hanya mencakup hasil studi literatur yang bertujuan dalam membangun pemodelan SISO Tx-Rx berbasis OFDM-cooperative yang akan lebih mengoptimalkan fungsi perangkat Tx-Rx sebagai sebuah terminal relay, dimana Tx-Rx akan bekerjasama sebagai relay terhadap sistem lainnya.
Internet of things and long range-based bridge slope early detection systems Umar, Nuraeni; Syarif, Syafruddin; Dewiani, Dewiani; Baharuddin, Merna
International Journal of Reconfigurable and Embedded Systems (IJRES) Vol 13, No 3: November 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijres.v13.i3.pp674-680

Abstract

This research proposes an internet of things and long range (LoRa)-based bridge slope status monitoring and warning system that is wireless, low-cost, and user-friendly, with continuous data sent. Bridge inspection officers can easily obtain bridge slope data via a web browser on a cell phone. The design uses Arduino integrated development environment software and an ITGMPU accelerometer sensors, TTGO ESP32, cellphones, successfully identified tilt angle variations from 0.11° to 15.2° were the research's outputs, and and they were continuously transmitted to the bridge inspection officer's mobile phone. Measurements of throughput, quality of service (QoS), and latency characteristics have been made to assess the internet network's performance. The network system performance statistics show an average measured network delay of 1.2 seconds, a throughput of 85 bps, and a QoS of 0%. Consequently, the system performs well and the internet network performance falls into the very good range.
Penggunaan Sensor Fr-04 Untuk Atap Jemuran Umar, Nuraeni; Yuniarti, Yuniarti; Kato, Franklin Aditama; Gunawan R, Riyan
Jurnal Teknologi Elekterika Vol. 20 No. 1 (2023)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v20i1.4243

Abstract

The FR-04 sensor is used on a clothesline roof, the research aims to overcome problems with clothesline when it rains it gets wet. This system functions to prevent the clothesline from getting wet by rain. This system moves to close and open the clothesline roof. The clothesline roof system will move to open or cover the clothesline, according to the input conditions of the light sensor (LDR) and rain sensor. The FR-04 sensor detects the presence of water droplets on the surface, then the Servo (as the driving force for the clothesline) will rotate 1800 Clockwise (clockwise and buzzer on. The results of the FR-04 Sensor system functioned very well to detect the presence of water droplets on the surface, and the system managed to close and open the clothesline roof by rotating 1800. 
SENSOR MQ-2 DETEKSI ASAP ROKOK BERBASIS INTERNET OF THINGS Umar, Nuraeni; A. K., Sahbuddin; Halide, Lidemar; Rusjdi, Maudy Imayanthi; Ijsam, Ismah Afifah
Jurnal Teknologi Elekterika Vol. 20 No. 2 (2023)
Publisher : Jurusan Teknik Elektro Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/elekterika.v20i2.4637

Abstract

Cigarette smoke contains toxic chemicals such as carbon monoxide (CO), nicotine and tar. The dangerous/poisonous ingredients in cigarettes cause health problems for those who smoke (active smokers) or those who don't smoke (passive smokers). To avoid the accumulation of cigarette smoke in the room, this research was created and carried out to detect cigarette smoke and reduce the levels of cigarette smoke in the room. Fan. will emit cigarette smoke into the room. The results of the detection of cigarette smoke levels will be sent to Labtop. This system was built using an MQ-2 sensor, ESP8266 microcontroller. The implementation of the cigarette smoke detection system is installed in 3 different rooms/places and is accessed by Internet of Things (IoT) network users. The research results show that every room where this system is installed will send data from cigarette smoke detection results to the lab. The MQ-2 sensor detects cigarette smoke, the data is sent to the internet network via the ESP8266, the data will be displayed on the laptop. From the sample test the tool responded well. This system will activate the fan at certain levels of cigarette smoke to reduce the level of cigarette smoke in the room. When the level is 0 ppm with the Green LED indicator on, the fan is not working or OFF. When the level shows 7 ppm the LED indicator lights up yellow and the fan will turn ON. For the red LED, the cigarette smoke level displayed is 32 ppm with the fan ON. These results prove that the system is functioning properly, detecting and controlling the operation of the fan to remove cigarette smoke from the room and transmit data to the internet network.
Extraction Optimization of Pigeon Pea Seed Protein and Yield Using Response Surface Methodology Indriati, Sri; Yusuf, Muhammad; Irsal, Muhammad; Latief, Mahyati; Umar, Nuraeni; Usdyana Attahmid, Nur Fitriani
INTEK: Jurnal Penelitian Vol 9 No 1 (2022): April 2022
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v9i1.3530

Abstract

Pigeon Pea (Casanus Cajan L.) is one of the local foods in South Sulawesi. Pigeon pea seeds contain protein that the body can absorb. This study aims to determine the optimum operating conditions for extracting pigeon pea on protein and yield using Ultrasonic-Assisted Extraction (UAE). Response Surface Methodology (RSM) with Box-Behnken Design (BBD) was used by considering three variables, time (30, 40, and 50 min), temperature (40, 50, and 60oC), and methanol concentration (50, 70, and 90%). The experiment results show that yield ranges from 8.85663% to 31.4766% and 46.1538 mg/l to 15584.6 mg/l. Response variables were computed and used to create the contour plot graphs. The optimum operating conditions for sonication extraction were a time of 44.760 minutes, a temperature of 60oC, and a 90% methanol concentration.
Co-Authors A. K., Sahbuddin Dewiani Dewiani Gunawan R, Riyan Halide, Lidemar Ijsam, Ismah Afifah Indriati, Sri Irsal, Muhammad Kato, Franklin Aditama Latief, Mahyati Merna Baharuddin Muhammad Yusuf Rusjdi, Maudy Imayanthi Sirmayanti, Sirmayanti Sulaeman Sulaeman Syafruddin Syarif Usdyana Attahmid, Nur Fitriani Yuniarti Yuniarti