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All Journal International Journal of Electrical and Computer Engineering Physics Student Journal Jurnal EECCIS
Imam Sholihuddin
Jurusan Fisika, FMIPA, Universitas Brawijaya
Computer Science & IT Electrical & Electronics Engineering Engineering Physics

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KALIBRASI DETEKTOR NaI(Tl) UNTUK PEMANTAUAN KONTAMINASI BAHAN RADIOAKTIF DI TANAH SECARA IN-SITU Sholihuddin, Imam; Noor, Johan A. E.; Bunawas, bunawas
Physics Student Journal Vol 1, No 1 (2013)
Publisher : Department of Physics - Faculty of Science

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

Abstract

Telah dilakukan kalibrasi terhadap spektrometer gamma dengan detektor NaI(Tl). Kalibrasi ini terdiri dari kalibrasi energi yang menunjukkan hubungan antara energi sinar gamma dengan channel pada sofware portable gamma mapping acquisition, kalibrasi efisiensi yang menunjukkan hubungan antara cacahan spektrometer dengan aktivitas sinar gamma. Kalibrasi energi dilakukan dengan menentukan puncak energi hasil pencacahan sumber titik Co-60 dan Cs-137. Kalibrasi efisiensi dilakukan dengan cara melakukan pencacahan terhadap sumber standar tanah dengan kandungan radionuklida alam dan sumber standar tanah dengan kandungan radionuklida buatan dengan nilai variasi ketinggian detektor yang berbeda antara detektor menggunakan shielding dan detektor tanpa menggunakan shielding. Hubungan energi dengan channel pada software dirumuskan oleh energi = 3,153 channel + 29,97. Nilai faktor koreksi stripping rasio 𝛼 dan 𝛽 untuk detektor menggunakan shielding adalah 0,03 dan 0,60, sedangkan untuk detektor tanpa menggunakan shielding adalah 0,02 dan 0,47. Nilai KMD (Konsentrasi Minimum yang dapat Dideteksi) untuk selang kepercayaan 1σ (68,5%) untuk detektor tanpa menggunakan shielding pada ketinggian 38 cm untuk radionuklida Cs-137 = 4,6 Bq/kg, K-40 = 23,4 Bq/kg, U-238 = 10,3 Bq/kg, Th-232 = 10,1 Bq/kg, sedangkan nilai KMD untuk detektor dengan menggunakan shielding pada ketinggian 23 cm untuk radionuklida Cs-137 = 1,9 Bq/kg, K-40 = 13,8 Bq/kg, U-238 = 5,9 Bq/kg, Th-232 = 5,8 Bq/kg.Kata kunci: kalibrasi, detektor NaI(Tl), energi, efisiensi, dan KMD.
Autonomous mobile robot implementation for final assembly material delivery system Firdaus, Ahmad Riyad; Sholihuddin, Imam; Hutasoit, Fania Putri; Naba, Agus; Suciningtyas, Ika Karlina Laila Nur
International Journal of Electrical and Computer Engineering (IJECE) Vol 16, No 1: February 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v16i1.pp158-173

Abstract

This study presents the development and implementation of an autonomous mobile robot (AMR) system for material delivery in a final assembly environment. The AMR replaces conventional transport methods by autonomously moving trolleys between the warehouse, production stations, and recycling areas, thereby reducing human intervention in repetitive logistics tasks. The proposed system integrates a laser-SLAM navigation approach, customized trolley design, RoboShop programming, and robot dispatch system coordination, enabling real-time route planning, obstacle detection, and material scheduling. Experimental validation demonstrated high accuracy in path following, with root mean square error values ranging between 0.001 to 0.020 meters. The AMR achieved an average travel distance of 118.81 meters and a cycle time of 566.90 seconds across three final assembly stations. The overall efficiency reached 57%, primarily due to reduced idle time and optimized material replenishment. These results confirm the feasibility of AMR deployment as a scalable and flexible intralogistics solution, supporting the transition toward Industry 4.0 smart manufacturing systems.
A Data-Driven Framework for Digital Fire Pump Condition Monitoring and NFPA 25 Compliance Support in Industrial Buildings Sholihuddin, Imam; Naba, Agus; Sucinintyas, Ika Karlina Laila Nur; Dharmawan, Hari Arief; Simatupang, Deo Dekri
Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems) Vol. 20 No. 2 (2026)
Publisher : Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jeeccis.v20i2.2046

Abstract

Fire pump systems are critical components of building fire protection infrastructure, yet their predominantly standby operation increases the risk of undetected failures between inspections. This study presents a digital monitoring framework for fire pump condition monitoring and NFPA 25 compliance support that continuously records hydraulic and operational data, automatically classifies weekly and annual test events, and generates structured digital records without modifying certified fire protection control functions. The framework was implemented in an industrial facility with electric- and diesel-driven fire pumps. Hydraulic evaluation of a Monoflo KP MX150-140 fire pump covered a flow range of 4,410–6,724 L/min (70.0%–106.7% of rated capacity). Digitalpressure measurements closely matched manual readings, with differences of 0.00–0.10 bar, and all 22 labeled test events werecorrectly identified. The system also enabled performance trending and reduced annual testing and documentation effortfrom approximately four days to 10–30 min (>90% reduction). Because the no-flow and 150% rated-flow conditions were notevaluated, the results represent a partial hydraulic assessment. Overall, the proposed human-in-the-loop framework improvesmonitoring visibility, inspection traceability, and audit readiness while supporting compliance-oriented digitalization.
Co-Authors Agus Naba Ahmad Riyad Firdaus Bunawas Bunawas Hari Arief Dharmawan Hutasoit, Fania Putri Ika Karlina Laila Nur Suciningtyas Johan A. E. Noor Simatupang, Deo Dekri Sucinintyas, Ika Karlina Laila Nur