SAGA: Journal of Technology and Information System

The Application of Augmented Reality as a Learning Medium for Acid-Base Reactions

Mochammad Osama Abdu Robbani — 2026-10-21

Chemistry learning at the junior high school level often faces challenges because many concepts are abstract and difficult to imagine, such as acid-base reactions. To overcome this, Augmented Reality (AR) technology can be used as an interactive and engaging learning medium. This study aims to develop an AR-based learning medium that can help junior high school students understand the concept of acid-base reactions in a more visual and enjoyable way. This medium displays 3D simulations of acid and base solutions, indicator color changes, and reaction results directly through devices such as smartphones or tablets. The results of the trial show that the use of AR in learning can increase students' interest in learning, understanding of concepts, and active participation in class. With an attractive and easy-to-use display, AR is an innovative solution to bring students closer to chemistry concepts that were previously difficult to understand.

Design Build System Information Rental Bus Tourism Using the Agile Method

Tiwi Irichanti — 2026-10-21

The development of information technology has had a significant impact on the transportation sector, particularly in improving service quality and customer satisfaction. One example of this is the development of a web-based tourist bus rental information system, which can overcome various obstacles in manual systems such as recording errors, information delays, and inefficient schedule management. PO Hariono Trans, a bus company operating in Sidoarjo, currently still uses conventional methods in managing fleet rentals. To address this challenge, this study proposes the development of a web-based information system using the Agile method. The Agile approach was chosen for its flexibility in responding to changing needs and its ability to improve collaboration and system development efficiency.Based on the results of testing using the Black Box Testing and User Acceptance Testing (UAT) methods, the system showed good performance with a 100% success rate in functionality testing and obtained a satisfaction score of 93% from 15 respondents. Thus, the developed system has proven to be effective in improving operational efficiency and providing easier and more responsive rental services for PO Hariono Trans customers.

Information Systems Audit at The Language Center of Muhammadiyah University of Sidoarjo

Muhammad Syauqil — 2026-10-21

This research conducts an information systems audit at the Language Center of Muhammadiyah University Sidoarjo using the COBIT 5 DSS domain framework. The audit aims to evaluate system reliability and efficiency amidst operational issues such as restricted website access and TOEFL certificate printing failures. Data collection involved interviews with unit leaders and technical observations. Results show maturity levels ranging from 2.1 (DSS03 - Problem Management) to 4 (DSS06 - Business Process Controls). Critical gaps include the absence of a ticketing system and backup automation. Recommendations focus on implementing centralized incident management and cybersecurity training. The study provides a governance model for optimizing language service systems in higher education institutions.

WasteGPS: A GPS-Based Mobile Application Connecting Households and Informal Collectors for Plastic Waste Collection in Airmadidi, Indonesia

Stevi Stevanus Gabriel — 2026-11-02

Informal waste collectors recover a considerable share of the plastic produced by Indonesian households. Interviews in Airmadidi District, North Sulawesi, however, revealed that collectors spend much of their working day searching for households with plastic to sell, while residents have no way to tell collectors that their sorted plastic is ready. To address this problem, we designed and implemented WasteGPS, a two-role Android application that connects residents and collectors through GPS-tagged reports. A resident submits a report containing the location coordinates, a description of the plastic, and a photograph. A collector sees each open report as a map marker, navigates to it with Google Maps, communicates with the resident through in-app chat, and closes the report after pickup. Collectors also post the types of plastic they buy and their price per kilogram. The application was developed with the prototyping model: requirements were elicited through interviews with two collectors, and the system was modeled in UML. All 20 black-box test scenarios (ten per role) passed on one Android 10 phone, covering the main path with valid input. The study contributes a functionally validated prototype of a role-based, location-aware workflow for independent collectors, a group that waste applications built for municipalities, pickup officers, and waste banks leave out. It also specifies the safeguards and the field pilot that deployment requires.

Closing the Loop in Citizen Waste Reporting: An Android E-Government Application with Status Tracking and Service Rating for North Minahasa Regency, Indonesia

Petro Pit Heinan Lewi Tobolu — 2026-11-02

Citizens of North Minahasa Regency report illegal waste dumping to the Environmental Agency through a public Facebook page, and operators relay the posts to field officers through a WhatsApp group. Interviews with the head of the agency’s waste management division revealed three shortcomings: responses were immediate or absent, operators could not confirm that reported piles existed, and citizens never learned the outcome of their reports. We developed an Android application that brings the process into one workflow for three roles. The citizen submits a report with a description, an address, and a photograph and tracks its progress. The field officer accepts or rejects the report, marks it as on the way, and closes it by uploading a photograph of the cleaned site. The citizen then rates the service on a five-point scale, and the ratings are made available to the head of the agency. It was built with Rapid Application Development, UML, React Native, Expo, and Firebase Realtime Database. A walkthrough with test accounts for all three roles showed a report passing through every status from submission to rating. None of the reviewed systems asks citizens to rate the service or routes their ratings to agency leadership, which this study adds. Because the walkthrough shows functional feasibility only, the study also specifies the verification, access control, data protection, exception handling, rating design, and field evaluation that deployment requires.