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All Journal Jurnal SPEKTRUM Journal of Electrical, Electronics and Informatics International Journal of Engineering and Emerging Technology PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Jurnal SPEKTRUM

Yoga Divayana

Electrical Engineering Department Faculty Of Engineering, Udayana University Bali, Indonesia

Author-ID : 2932674

Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Physics Other

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Information System For Web Based-Report Household Violence In Denpasar Yoga Divayana; Linawati Linawati; N.M.A.E.D. Wirastuti; Luh Ika Dhivtyasari Suryani
Journal of Electrical, Electronics and Informatics Vol 2 No 1 (2018): JEEI (February 2018)
Publisher : Institute for Research and Community Services Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEEI.2018.v02.i01.p04

Domestic violence is the most common case in the community. Women and children are victims of domestic violence. In Denpasar, Indonesia, currently, data collection system of victims of domestic violence (KDRT) is conducted by the Women's Empowerment and Child Protection Agency. It is still has some limitations because it is operating manually. Through this web-based data collection system of domestic violence, a complaint report on domestic violence can be done digitally so it does not need to report manually to the authorities. In this system, the victims will be given freedom to show or hide their identity. This system receives input filled form of violent reports; next, the complaints report can be known by others (not admin) anonymously. After the complaint report get into in the system, it will be done the next process which is verification. The results of the verification process will determine the validity of complaint reports. After passing the verification process, report data will be recorded in the system and will be done the formulation of follow-up to the action of the case by the legislation authorities.

Boundary Value Analysis Testing Techniques on Learning Management System Applications I Putu Astya Prayudha; Rukmi Sari Hartani; Yoga Divayana
International Journal of Engineering and Emerging Technology Vol 4 No 2 (2019): July - December
Publisher : Doctorate Program of Engineering Science, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/IJEET.2019.v04.i02.p07

Application of Learning Management System of Lampung State Polytechnic (LMS Polinela) is an elearning application developed as an alternative teaching media that aims to complement existing teaching media to help students learn independently so that learning outcomes are more optimal and efficient. This study uses a black box testing boundary value analysis technique in testing the Polinela LMS application. This boundary value analysis technique works by determining the upper and lower limits of the data to be tested, after which the data is inputted to the Polinela LMS application. The results of the review of the journal from Zuriati et al with the title "Testing Technique of Boundary Value Analysis in the Polinela Learning Management System Application" is to provide a clear understanding of the theory of Boundary Value Analysis. The Boundary Value Analysis technique described has been able to provide a description of the stages and processes in testing each functionality. The process functionality is explained thoroughly so that the reader can better understand and know the entire process that is in the application. Index Terms— Learning management system, black box, boundary value analysis

RANCANG BANGUN SISTEM SMART HOME PADA RUMAH KOS BERBASIS INTERNET OF THINGS Gede Prananda Putra; Yoga Divayana; Pratolo Rahardjo
Jurnal SPEKTRUM Vol 9 No 1 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Technological developments in the field of electronics to date have made the humanmindset advanced in the application of electronic equipment. One example of its development isremote control of electrical equipment. Many people use these developments as a means offacilitating life activities in solving problems that occur. The use of the internet in life can beused as an example in the use of technological developments. The internet is one of thecommunication media that has many benefits in increasing effectiveness, work efficiency, andmonitoring. The internet can be used as a transmission medium for control and monitoringsystems. With the internet, one can control electrical equipment and monitor the condition of thehouse. The concept originated from the Internet of Things or IoT. IoT is a concept where alltools and services in the system are connected to each other using internet media. Based onthese problems, a smart home system was created that functions as control of electricalequipment, smoke detection, monitoring of temperature and humidity in the room. Themonitoring and control system is integrated with Android applications and based on the Internetof Things.

THE FÃ–RSTER-TYPE EXCITON QUENCHING MECHANISM AND ITS IMPACT TO THE QUANTUM EFFICIENCY AND EXCITON DIFFUSION IN ORGANIC SEMICONDUCTOR Yoga Divayana
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 1 (2012): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2012
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (431.153 KB)

Organic light-emitting diodes (OLEDs) have emerged as one of the most important generallighting technologies of the future. The current state-of-the-art OLED utilizes various differentlayers which function separately as carriers transport, carriers and excitons blocker, and emittinglayer. The emission layer of the OLED is normally formed by a host-guest system obtained byco-evaporating a small amount of guest molecule in the matrix of host material. It is generallyaccepted that in a host-guest system, concentration quenching is caused by molecules aggregation.As concentration of guest molecule increases, a drop in quantum efficiency is followed by a redshiftin the emission spectrum, characteristics of aggregate state. Here we show that concentrationquenching is also caused by another FÃ¶rster-type interaction. We investigate this FÃ¶rster-typeexciton quenching process in various organic molecules and its effect to the exciton diffusion.

PERANCANGAN APLIKASI BASE STATION DALAM SISTEM KOORDINASI ROBOT SEPAK BOLA BERODA DENGAN MULTI THREAD Komang Edy Surya Prabowo; Yoga Divayana; Pratolo Rahardjo
Jurnal SPEKTRUM Vol 9 No 4 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The Indonesian Wheeled Football Robot Contest (KRSBI Beroda) is one of the divisions of the Indonesian Robot Contest (KRI). At KRSBI Beroda robots are expected to be able to move automatically by using the Base Station as a communication center between robots in the same team. Base Station has a function to forward orders from the referee or RefBox (Referee Box) to the robot. This study aims to add features to the Base Station by displaying the position of two robots in the field in animation using the multi-thread method to facilitate strategy formulation. The result is that the Base Station that is made can display the position of two robots in the field without any errors.

PERBANDINGAN ALGORITMA SUPERVISED MACHINE LEARNING UNTUK SISTEM PENGHINDARAN HALANGAN PADA ROBOT ASSISTANT UDAYANA 02 (RATNA02) Yohanes Andre Setiawan; Yoga Divayana; Wayan Widiadha
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Supervised Machine Learning can make robots smarter by making decisions automatically. This study compares various Supervised Machine Learning algorithms to determine the best algorithm that can be used on Robot Assistant Udayana 02 (RATNA02). The algorithms to be compared are Artificial Neural Network (ANN), Support Vector Machine (SVM), Decision Tree (DT), Random Forest (RF), Naïve Bayesian (NB), and K-Nearest Neighbor (KNN). Models were created using the TensorFlow and SKLearn libraries. The model is trained using 100.000 data of left sensor, right sensor, front sensor, robot offset, and data label. Data preprocessing is done using MinMaxScalar and LabelEncoder. The comparisons that will be measured are accuracy, training duration, and file size of the model. DT and RF algorithms get 100% accuracy followed by ANN, KNN and SVM with 99.87%, 97.42% and 98.52% respectively, and NB with 87.34%. Fastest training duration was achieved by NB for 0.03 seconds, followed by DT for 0.08 seconds, while other algorithms took more than one second. The smallest file size is owned by NB with a size of 2kb and DT ranks second with 4kb, other algorithms have a file size of more than 25kb. Decision Tree Algorithm is the best because the duration of the model training is relatively fast, the file size is small, and the accuracy is high.

RANCANG BANGUN MODUL TRAINER KIT MATA KULIAH SISTEM KENDALI+LAB BERBASIS INTERNET OF THINGS (IoT) Hernandi, William; Rahardjo, Pratolo; Alit Swamardika, Ida Bagus; Divayana, Yoga; Oka Saputra, Komang
Jurnal SPEKTRUM Vol 11 No 2 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar

Along with the development of technology, control systems can now control various devices using smartphones connected to the internet remotely (Internet of Things). In order to have a good understanding of this field, universities have a very important role as an education institution. One of them is Udayana University through the Control System + Lab Course in the Independent Campus Learning Curriculum. This study aims to design an IoT-based Lab + Control System Trainer Kit Module using DevKit ESP32. The designed system includes an IoT-based DC motor control system using an L298N motor driver, an IoT-based water cooling control system using a DS18B20 temperature sensor, and an IoT-based water level control system using an HC-SR04 ultrasonic sensor. The system will be controlled through an application that has been created and installed on a smartphone connected to the internet so that it can be tested and analyzed to draw conclusions.

RANCANG BANGUN SISTEM PENJADWALAN DAN KONTROL KANDANG KELINCI BERBASIS INTERNET OF THINGS Alie Sulthan, Mayben Sayyidina; Divayana, Yoga; Rahardjo, Pratolo
Jurnal SPEKTRUM Vol 10 No 4 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i04.p29

These days technology has developed rapidly, almost covering all aspects in humas life for example is automation system. The automation system works without human intervension and complete all works independently. Existing technology can already be connected to each other via the internet network so that it can transmit or receive data automatically. The Internet of Things (IoT) can support automated systems by providing real-time information so that users can monitor the performance of these automated systems. This research was to develop rabbit cage by utilizing microcontroller as monitoring system. The system utilizing Internet of Things (IoT) as monitoring medium between users and devices to help users monitor their rabbit cage remotely. The design installed several sensors such as ultrasonic, temperature, load cell sensors, DS18B20 and water level sensors. This research used Arduino Mega 2560 as main microcontroller and NodeMCU ESP8266 as communication device between the tools and database. The tools use android application on user smartphone that fuctions real time monitoring for the cage. Based on the results of this research by using Arduino Mega as microcontroller board to controlling and monitoring rabbit’s cage has succesfully in monitoring the cage via internet through the NodeMCU ESP8266 intermediary according to the design.

RANCANG BANGUN MODUL TRAINER KIT SISTEM KENDALI BERBASIS DIGITAL Indra Christian, Febry; Rahardjo, Pratolo; Alit Swamardika, Ida Bagus; Divayana, Yoga; Oka Saputra, Komang; Elba Duta Nugraha, I Putu
Jurnal SPEKTRUM Vol 11 No 2 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar

A control system is defined as a combination of several components that aim to produce a system response in accordance with the desired process variables. Therefore, control systems are now widely used in various fields such as industry, automotive, public facilities, and household appliances. Especially in the industrial field, control systems play a role in improving production quality and reducing production costs. To create qualified human resources who have a good understanding in this field, universities have an important role in realizing this. One of them is Udayana University through the Electrical Engineering Study Program in the Independent Learning Curriculum in the Control System + Lab Course. This study aims to design a Digital-Based Control System + Lab Trainer Kit Module using Arduio Uno to support the process of implementing practicum in the laboratory. In the trainer kit module, there will be three systems designed, which are DC motor direction and speed control system using L298N motor driver, water heater control system using DS18B20 temperature sensor, and also water level control system using HC-SR04 ultrasonic sensor.

RANCANG BANGUN SISTEM MONITOR KONDISI AIR DAN PAKAN BERBASIS IOT DENGAN CATU DAYA PLTS PADA KOLAM LELE I Komang Alit Astawa; Putu Ananta Sastra Wijaya; I Made Aditya Wirawan; IGAP Raka Agung; I N Setiawan; I W Shandyasa; Pratolo Rahardjo; Yoga Divayana
Jurnal SPEKTRUM Vol. 12 No. 3 (2025): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2025.v12.i03.p3

Catfish farming requires proper monitoring of pond water quality and feed management. Limited time for farmers to monitor ponds directly poses challenges in maintaining water quality and feeding schedule accuracy. This study aims to implement a water quality monitoring device using sensors and an automated scheduled feeding system. This research uses a system development method based on the ADDIE model, consisting of five stages: Analysis, Design, Development, Implementation, and Evaluation. The developed device consists of sensors and actuators. Sensor data is displayed through the Firebase platform and OLED screen on the panel box. The system uses a 120 Wp solar panel with a LiFePO4 12V 22Ah battery as a power source. Testing for 3 days (May 18-20, 2025) showed an average pond water temperature of 25.1°C using DS18B20 sensor, average pH value of 7.7 using pH-4502c sensor, feed volume decreased from 6 kg to 4.9 kg (from 100% to 83%) measured using HC-SR04 sensor, and battery voltage between 13.2-13.8V measured using INA219 sensor. Automated feeding is carried out using a combination of a DC motor and servo motor. The results indicate that the system successfully integrates water quality monitoring and scheduled automated feeding using the Firebase platform. This system has the potential to be applied by fish farmers to overcome time constraints in direct pond monitoring.

Co-Authors Alie Sulthan, Mayben Sayyidina Amien Harist Hardiansyah Anak Agung Arta Darmika Anak Agung Ngurah Mahendra Wijaya Arya Sukma Krisnayoga Darmawan, I Gede Hadi Debbi Irfan Mudhoep Gede Humaswara Prathama Gede Prananda Putra Gede Sukadarmika Hernandi, William I Gede Hadi Darmawan I Gede Yogi Astawan I Gst Agung Putu Raka Agung I Gusti Ngurah Yoga Pawitra I Kadek Krisna Angga Pamungkas I Komang Alit Astawa I Made Aditya Wirawan I Made Arya Budhana I N Satya Kumara I N Setiawan I Nyoman Benny Rismawan I Nyoman Edy Saputra I Putu Ade Chandra Priyatna I Putu Astya Prayudha I Putu Elba Duta Nugraha I Putu Sudharma Yoga I W Shandyasa I. M. R. A Anantajaya Ida Bagus A. Swamardika Ida Bagus Agung Eka Mandala Putra Ida Bagus Leo Mahadya Suta Indra Christian, Febry Kadek Bintang Anjasmara Komang Edy Surya Prabowo Komang Nova Artawan Komang Oka Saputra Linawati Linawati Lintang Pramudya Luh Ika Dhivtyasari Suryani Made Dwi Mulyawan Moch. Farhan Arieffadillah Muhammad Namiruddin Al Hasan N. M. A. Wijaya Ni Ketut Novia Nilasari Ni Luh Ade Mita Rahayu Dewi Ni Made Ary Esta Dewi Wirastuti Oka Saputra, Komang Pramudya, Lintang Pratolo Rahardjo Purwania Ida Bagus Gede Putri Suardani Putu Ananta Sastra Wijaya Rukmi Sari Hartani Rukmi Sari Hartati Rukmi Sari Hartati Siti Ayu Oktavianti Surya Pramana Tander Risard Lowongan Tjok Gede Indra Partha Wayan Widiadha Wijaya, Anak Agung Ngurah Mahendra Yohanes Andre Setiawan

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