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Network Coding Schemes and Cooperative Communication Systems Amplify and Forward in Outdoor Environments Khair, Ummul; Dahlan, Andi Ahmad; R, Ihsan Lumasa; Nita, Sri; Veronica, Vera
Journal of Computer Networks, Architecture and High Performance Computing Vol. 6 No. 4 (2024): Articles Research October 2024
Publisher : Information Technology and Science (ITScience)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/cnahpc.v6i4.4705

Fading is a phenomenon of decreasing signal strength during transmission, caused by changes in environmental conditions or physical obstacles in the propagation path. Fading can cause interference in signal reception, such as distortion or loss of information, especially in Non-Line of Sight (NLoS) paths, where signals must pass through many paths or obstacles such as buildings, trees, or other objects. To eliminate fading interference, a cooperative communication system is created to reduce the effects of fading in wireless networks. The cooperative communication system works by utilizing other nodes in sending signals to the destination. The relay protocol used in this study is amplify and forward, where the signal to be sent will be amplified and forwarded to the destination by the relay node. A network coding scheme is added to the cooperative communication system to improve network performance. This scheme encodes each piece of information with the XOR technique. The parameters used in measuring the network coding scheme in the cooperative communication system are BER and throughput. Viewed from the BER value, the conventional cooperative communication system has better performance compared to the cooperative communication system with network coding. Cooperative communication system scheme without NC BER value is 0 when the transmit power value is -19 dBm or Gain 32. While for the cooperative communication system scheme with network coding BER value is 0 when transmit power of -9.25 dBm. Throughput system with network coding has increased by 17% compared to the conventional system.

Design And Design Of A Temperature And Humidity Monitoring System For Broiler Chicken Cages Based Internet Of Things (IOT) Prasetia, Robby Adrian; Dahlan, Andi Ahmad; Lifwarda, Lifwarda
PERFECT: Journal of Smart Algorithms Vol. 1 No. 2 (2024): PERFECT: Journal of Smart Algorithms, Article Research July 2024
Publisher : LEMBAGA KAJIAN PEMBANGUNAN PERTANIAN DAN LINGKUNGAN (LKPPL)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/perfect.v1i2.23

In this research, we designed a tool that is used to help chicken farmers to continue their daily activities in raising livestock. Problems often experienced by chicken farmers are frequent theft, and having to check the temperature manually in the coop. So a Security and Temperature Monitoring and Light Control System for Broiler Chicken Cages Based on Internet of Things (IoT) was created using NodeMcu Esp32 as the controller of the entire system. The tools used in this system are, Buzzer, DHT22, LCD 16x2, ESP32, Breadboard, Relay, and Incandescent Lamp. The tool making method uses engineering design methods in making the automation system. The test results show that the system that has been made is able to maintain the temperature in the chicken coop in accordance with the ideal conditions for Broiler chickens.

IoT-Based Rainfall Monitoring System for Chili Farming Land Putri, Rahmadani; Dewi, Ratna; Rifka, Silfia; Nita, Sri; Dahlan, Andi Ahmad
Brilliance: Research of Artificial Intelligence Vol. 3 No. 2 (2023): Brilliance: Research of Artificial Intelligence, Article Research November 2023
Publisher : Yayasan Cita Cendekiawan Al Khwarizmi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/brilliance.v3i2.3649

This research focuses on the design and implementation of a rainfall monitoring system for chili pepper farms using Internet of Things (IoT) technology. The rainfall monitoring system consists of a transmitter system, a receiver system, the Thingspeak platform as a database, and a weather station application that can be accessed via a mobile device. The weather station application is built using the MIT App Inventor platform. In the testing phase, the system successfully collected data from two sensors used, namely the rainfall intensity sensor and the raindrop sensor. The test results showed that the data obtained from the rainfall intensity sensor was 0.25 inches and the raindrop sensor was 1. This result shows that there was no rain during the test. This rain intensity and raindrop data can provide farmers with an overview of the weather conditions in the chili pepper farm. So, with this rainfall monitoring system, farmers can monitor the condition of their agricultural land in real-time. The collected data can help farmers to care for chili pepper plants more effectively and adapt to environmental changes. In addition, this system is expected to increase the productivity of chili pepper farming because it uses a more precise and responsive approach to changes in environmental conditions on the chili pepper farm.

Network Coding Schemes and Cooperative Communication Systems Amplify and Forward in Outdoor Environments Khair, Ummul; Dahlan, Andi Ahmad; R, Ihsan Lumasa; Nita, Sri; Veronica, Vera
Journal of Computer Networks, Architecture and High Performance Computing Vol. 6 No. 4 (2024): Articles Research October 2024
Publisher : Information Technology and Science (ITScience)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/cnahpc.v6i4.4705

Fading is a phenomenon of decreasing signal strength during transmission, caused by changes in environmental conditions or physical obstacles in the propagation path. Fading can cause interference in signal reception, such as distortion or loss of information, especially in Non-Line of Sight (NLoS) paths, where signals must pass through many paths or obstacles such as buildings, trees, or other objects. To eliminate fading interference, a cooperative communication system is created to reduce the effects of fading in wireless networks. The cooperative communication system works by utilizing other nodes in sending signals to the destination. The relay protocol used in this study is amplify and forward, where the signal to be sent will be amplified and forwarded to the destination by the relay node. A network coding scheme is added to the cooperative communication system to improve network performance. This scheme encodes each piece of information with the XOR technique. The parameters used in measuring the network coding scheme in the cooperative communication system are BER and throughput. Viewed from the BER value, the conventional cooperative communication system has better performance compared to the cooperative communication system with network coding. Cooperative communication system scheme without NC BER value is 0 when the transmit power value is -19 dBm or Gain 32. While for the cooperative communication system scheme with network coding BER value is 0 when transmit power of -9.25 dBm. Throughput system with network coding has increased by 17% compared to the conventional system.

Monitoring Real-time Server Dan Router Berbasis Zabbix Dengan Notifikasi Alert Telegram: Studi Pra-Pasca Di SDIT Raudhatul As-Salimy Gobah Rahayu, Putri Dwi; Dahlan, Andi Ahmad; Vitria, Rikki
Intellect : Indonesian Journal of Learning and Technological Innovation Vol. 4 No. 1 (2025): Intellect : Indonesian Journal of Learning and Technological Innovation
Publisher : Yayasan Lembaga Studi Makwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57255/intellect.v4i1.1372

Reliable network monitoring technology is essential for educational institutions to ensure uninterrupted digital services. This study aims to implement a Zabbix-based server and router monitoring system integrated with Telegram notifications at SDIT Raudhatul As-Salimy Gobah. A mixed-methods approach was applied, combining quantitative pre–post evaluation with qualitative interviews and observations of the school’s IT staff. The results show that the system detected failures with an average delay of 2 minutes 30 seconds and delivered recovery notifications within 20 seconds. Integration with Telegram significantly reduced the mean time to acknowledge (MTTA) from 1–2 hours to 10–20 minutes, thereby improving IT team responsiveness in handling incidents. This implementation not only minimized network downtime but also enhanced operational efficiency, infrastructure stability, and the quality of digital-based learning services. The main contribution of this study is the development of a low-cost, open-source, and replicable network monitoring model suitable for K-12 schools in rural areas. Abstrak Pemanfaatan teknologi monitoring jaringan yang handal menjadi kebutuhan penting bagi institusi pendidikan untuk menjaga kelancaran layanan digital. Penelitian ini bertujuan mengimplementasikan sistem monitoring server dan router berbasis Zabbix yang terintegrasi dengan notifikasi Telegram di SDIT Raudhatul As-Salimy Gobah. Metode penelitian menggunakan pendekatan mixed-methods, yaitu evaluasi kuantitatif pre–post implementasi serta wawancara dan observasi kualitatif terhadap tim IT sekolah. Hasil pengujian menunjukkan bahwa sistem mampu mendeteksi gangguan dengan rata-rata waktu 2 menit 30 detik dan mengirimkan notifikasi dalam 20 detik setelah perangkat kembali normal. Integrasi dengan Telegram secara signifikan menurunkan mean time to acknowledge (MTTA) dari 1–2 jam menjadi 10–20 menit, serta memperbaiki responsivitas tim IT dalam menangani gangguan. Implementasi ini tidak hanya mengurangi downtime jaringan, tetapi juga meningkatkan efisiensi kerja, stabilitas infrastruktur, serta kualitas layanan pembelajaran berbasis digital. Kontribusi penelitian ini adalah penyusunan model monitoring jaringan open-source, biaya rendah, dan replikatif yang dapat diterapkan oleh sekolah K-12 di wilayah rural.

Web Application Penetration Testing Using SQL Injection Attack Alanda, Alde; Satria, Deni; Ardhana, M.Isthofa; Dahlan, Andi Ahmad; Mooduto, Hanriyawan Adnan
JOIV : International Journal on Informatics Visualization Vol 5, No 3 (2021)
Publisher : Society of Visual Informatics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/joiv.5.3.470

A web application is a very important requirement in the information and digitalization era. With the increasing use of the internet and the growing number of web applications, every web application requires an adequate security level to store information safely and avoid cyber attacks. Web applications go through rapid development phases with short turnaround times, challenging to eliminate vulnerabilities. The vulnerability on the web application can be analyzed using the penetration testing method. This research uses penetration testing with the black-box method to test web application security based on the list of most attacks on the Open Web Application Security Project (OWASP), namely SQL Injection. SQL injection allows attackers to obtain unrestricted access to the databases and potentially collecting sensitive information from databases. This research randomly tested several websites such as government, schools, and other commercial websites with several techniques of SQL injection attack. Testing was carried out on ten websites randomly by looking for gaps to test security using the SQL injection attack. The results of testing conducted 80% of the websites tested have a weakness against SQL injection attacks. Based on this research, SQL injection is still the most prevalent threat for web applications. Further research can explain detailed information about SQL injection with specific techniques and how to prevent this attack.

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