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Design of automatic fire extinguishing system with interactive web display Adziimaa, Ahmad Fauzan; Azizah, Salma
Jurnal Nasional Aplikasi Mekatronika, Otomasi dan Robot Industri (AMORI) Vol 3, No 2 (2024): December
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27213560.v3i2.12415

Abstract

An automatic fire extinguishing system prototype has been designed. This design consists of software and hardware design. Software design involves sensors, actuators, controllers, sim900 modules and website interfaces. Hardware design is to make a prototype fire extinguishing system. Fire extinguishing system testing is done by testing the system's components such as sensors, actuators, sim900 modules, and website responses to the database. LM35 Sensor testing resulted in a measurement error of 3.29% with a measurement accuracy of 96.8% and MQ135 Sensor testing resulted in an error of 16.6% with a measurement accuracy of 90.4%. The MQ135 Sensor error is quite large because the standard measuring instrument used as a comparison measures changes in ppm levels very quickly. The actuator test results show that the buzzer can provide notification when the LM35 Sensor exceeds the set point of 57 ℃ and the MQ135 Sensor reaches 101 ppm. The relay is active when both sensors have reached the set point, and the pump will turn on to extinguish the fire. The results of testing the entire system show that the sensor works well in detecting temperature and smoke level changes so that the actuator will turn on when the temperature and smoke levels have reached the set point. The SIM900 module will send an SMS to the user if a fire is indicated. The interface of this system displays the temperature measurement levels and smoke levels in real time on the website.
Faktor Faktor Yang Mempengaruhi Minat Mahasiswa Dalam Memilih Program Studi Nabila, Azzahra Putri; Novitasari, Eka; Darmadi, Ines Shopie; Falahudin, Muhammad Akmal; Azizah, Salma; Nugraha, Joko Tri
Complex : Jurnal Multidisiplin Ilmu Nasional Vol. 2 No. 1 (2025): COMPLEX - Februari
Publisher : PT. Faaslib Serambi Media

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

Abstract

Penelitian ini bertujuan untuk mengetahui faktor faktor yang mempengaruhi minat mahasiswa dalam memilih program studi di perguruan tinggi. Mahasiswa memilih program studi dipengaruhi oleh faktor sosial, pribadi, keluarga, teman, fasilitas kampus, reputasi perguruan tinggi serta minat. Penelitian ini menggunakan metode kuantitatif dengan pendekatan survey, dimana data primer diperoleh melalui penyebaran kuisioner. Responden dalam penelitian ini adalah mahasiswa program studi ilmu komunikasi. Hasil penelitian ini menunjukan bahwa pemilihan program studi di perguruan tinggi dipengaruhi oleh  keinginan pribadi, keluarga, teman, adanya prospek dan peluang karier, fasilitas kelas dan kampus yang memadai, kualitas dosen pengajar, adanya kegiatan studi banding. 
Evaluation of the Performance of Corroded Concrete with Bottom Ash and Bacteria using Resistivity and Impact Echo Techniques Zaki, Ahmad; Azizah, Salma; P. Rosyidi, Sri Atmaja; Mahbubi, Khairil; Ibrahim, Zainah
SINERGI Vol 29, No 2 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2025.2.003

Abstract

Concrete is a significant contributor to global emissions, necessitating the development of environmentally friendly alternatives. This study explores the use of reinforced concrete (RC) incorporating industrial by-products, specifically bottom ash (BA), as a partial sand replacement to address this issue. Additionally, the study examines the potential of Bacillus subtilis bacteria to enhance the self-repair capabilities of corroded RC with BA. Concrete mixtures with 10%, 20%, and 30% BA were prepared and subjected to accelerated corrosion for 48, 96, and 168 hours. The corroded RC specimens were then tested for compressive strength, flexural strength, corrosion rate, non-destructive testing (NDT) methods, and SEM analysis. NDT methods included impact echo (IE) and resistivity techniques. Results showed that increasing BA content led to a decrease in corrosion resistance, with current measurements of 2.07, 1.64, and 1.47 amperes for 10%, 20%, and 30% BA, respectively. After 168 hours of corrosion, the IE frequency of the Bacillus subtilis-treated specimens was 2561.04 Hz, the lowest among all samples, while the 30% BA specimen exhibited the highest frequency at 7924.81 Hz. Resistivity measurements after 168 hours showed lower resistivity in Bacillus subtilis-treated specimens (18.25 kΩ·cm) compared to the 20% BA specimen (29.27 kΩ·cm). These findings suggest that the addition of BA and Bacillus subtilis bacteria can reduce the corrosion risk in concrete, making it a viable alternative to traditional RC.