UPN (Universitas Pembangunan Nasional) Veteran Yogyakarta: Portal Journals
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Measuring the Financial Performance of Local Governments: A Ratio-Based Analysis
Full text linkDIY is classified as a region with low fiscal capacity because the region has consistently recorded the lowest local revenue realization on Java Island and remains heavily reliant on central government transfers. Financial ratio analysis serves as a crucial tool for identifying trends in the financial performance of regional governments over time. It provides a foundation for evaluating the effectiveness of their financial management. This study uses secondary data. The data were collected from financial reports for the period 2020-2024 to calculate eight core financial ratios, including the Effectiveness Ratio, Efficiency Ratio, Growth Ratio, Compatibility Ratio (for Both Operating and Capital Expenditures), Regional Financial Independence Ratio, Regional Financial Dependency Ratio, and Degree of Decentralization Ratio. The study shows high revenue effectiveness, but low spending efficiency, and financial independence is weak. The pandemic led to negative growth in 2020, followed by an uneven recovery. These results underscore the importance of enhancing local revenue, improving efficiency, and reducing reliance on central transfers for achieving sustainable fiscal health
Intelligent products pricing in dynamic competition based-on Stackelberg game theory
Full text linkOptimising product price is essential in dynamic competitive markets to maximise the total profit of all players and secure their survival in the market. This study addresses the intelligent optimisation of product prices in a competitive environment using Stackelberg game theory (SGT), where both a leader and follower player are considered. The objective is to determine the optimum selling prices for five main products to maximise the profits of all the players. Novel aspects of this study are the integration of optimisation models of all of the players and incorporation demand prediction accuracy into the optimisation process, ensuring that the predicted demand resulting from optimised prices aligns with historical demand data—a factor that has been disregarded by prior studies. Genetic Algorithm (GA) is employed for the optimisation algorithm due to the complexity of the model that involves numerous parameters and decision variables. The results demonstrate that the proposed products selling prices not only enhances the total profits of all of the players but also ensures that the predicted demand pattern closely fits the historical demand data pattern, validating the effectiveness of the approach
Production of Liquid Fuel from Motorcycle Used Tire via Pyrolysis: Effect of Temperature on Yield and Calorific Value
Full text linkThe continuous accumulation of used tires has raised serious environmental concerns due to their non-biodegradable nature. Pyrolysis offers a promising thermal conversion method to transform used tires into alternative energy sources. This study investigates the pyrolysis of used motorcycle tires, cut into 1 x 1 cm pieces, under atmospheric pressure at various temperatures ranging from 400°C to 750°C, using 500 grams of tire material for each run. The tar and char yields were collected, and the calorific values of the liquid product were analyzed. The optimum operating condition was found at 700°C, yielding 276.56 g of tar and 184.55 g of char after 2 hours and 35 minutes of reaction. The highest calorific value obtained was 39.98 MJ/kg. Although the liquid fuel produced exhibits significant energy content, its calorific value remains lower than that of conventional fuels used in vehicles. This indicates the potential of tire-derived oil as a supplementary fuel, with further improvement needed in quality and performance
Optimization of Rotation Speed, Disc Diameter, and Lighting Time in Batik Waste Treatment Using Rotary Algae Biofilm Reactor (RABR) with Ulva sp.
Full text linkBatik is one of the cultural heritages in Indonesia that must be maintained and preserved. The batik industry process itself produces liquid waste that comes from the coloring processing, washing, wax removing, also rinsing. Batik waste, if not treated properly, can harm the environment. Various studies have shown that effluent treatment using the Rotary Algae Biofilm Reactor (RABR) method is promising. This research focuses on improving the RABR design and optimal conditions for treating batik wastewater, as well as utilizing the synergy between batik production and Ulva sp. The variables used in this research are the rotation speed of 20, 30, and 40 rpm, the lightning time for 0, 6, and 12 hours, and the disk diameter size of 9, 11, and 13 cm. The parameters that analyzed are BOD, COD, and pH levels. Waste treatment optimization in this research uses the RSM with a combination of Design Expert 13 software. Based on the results, the most optimal batik wastewater treatment variable is when the disk diameter is 10.306 mm, the rotation speed is 20 rpm, and the lightning time is 7.805 hours, yielding response values of 55.673 mg/L for BOD, 25.538 mg/L for COD, and 10.406 for pH
Comparison of Income of Independent Rubber and Palm Oil Farming in Kenaman Village, Sekayam District, Sanggau Regency
Full text linkThis study compares the income levels of self-managed rubber and oil palm farms in Kenaman Village, focusing on farm management challenges. A quantitative descriptive approach was used, involving 95 farmers. Levene\u27s test indicated homogeneous income variances between the two farm types, while a mean difference test revealed a significant income disparity. The results highlight differences in annual income between rubber and oil palm farming. The results showed that the Levene test produced a result of 0.063 (>0.05), indicating that the rubber and oil palm income data were homogeneous (the T-test results read were the same variance as assumed). Sig. (2-tailed) is 0.000 (<0.05), indicating a significant difference between the annual income of rubber and oil palm farms in Kenaman Village
Efek Paparan Tagar #KaburAjaDulu terhadap Intensi Bekerja ke Luar Negeri Mahasiswa
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Perkembangan teknologi digital telah mengubah pola komunikasi masyarakat dan menjadikan media sosial sebagai ruang utama pembentukan opini publik serta perilaku sosial. Salah satu fenomena digital yang merepresentasikan dinamika sosial-ekonomi generasi muda Indonesia adalah viralnya tagar #KaburAjaDulu, yang mencerminkan kritik terhadap terbatasnya lapangan kerja dan ketidakpastian masa depan. Penelitian ini bertujuan untuk menganalisis pengaruh paparan dua jenis narasi media sosial—narasi bela negara dan narasi pragmatis—terhadap intensi bekerja ke luar negeri pada mahasiswa tingkat akhir Universitas Pembangunan Nasional “Veteran” Yogyakarta tahun akademik 2024/2025. Metode yang digunakan adalah eksperimen dengan desain post-test only control group melibatkan 90 responden yang dibagi ke dalam tiga kelompok perlakuan: narasi bela negara, narasi pragmatis, dan kelompok kontrol. Data dianalisis menggunakan uji Kruskal–Wallis dan uji lanjut Dunn Test. Hasil penelitian menunjukkan adanya perbedaan signifikan antar kelompok (p = 0,018). Kelompok yang terpapar narasi pragmatis memiliki intensi bekerja ke luar negeri tertinggi (M = 4,26), sedangkan kelompok bela negara terendah (M = 3,03). Temuan ini diinterpretasikan melalui Teori Pemrosesan Informasi (McGuire, 1985), yang menunjukkan bahwa pesan yang relevan secara emosional dan kontekstual lebih mudah diterima dan diinternalisasi. Penelitian ini menegaskan bahwa media sosial berperan sebagai arena ideologis tempat nilai-nilai nasionalisme dan pragmatisme ekonomi saling berinteraksi, serta menunjukkan perlunya strategi komunikasi bela negara yang adaptif terhadap realitas sosial generasi muda.
Kata kunci: #KaburAjaDulu; intensi migrasi; bela negara; narasi media sosia
The Influence of Social Media Marketing on Instagram to the Creation of Brand Equity: Case of @kitabisacom
Full text linkA social enterprise initiated a crowdfunding application to gather funds from people. Those who are in need could post an announcement of the amount of funds they needed. Majority used the funds for medical treatment, some used to rebuild infrastructure in places that experienced calamities. The platform’s popularity not only gets good attention but also invites those who had scamming intentions. Thus, continuous communication and dialogue must be in place to restore trust. This study investigates the influence of social media marketing that is conducted by the organization via social media account kitabisacom on Instagram to the creation of brand equity. The independent variable is social media marketing that consists of four dimensions which are brand awareness, brand loyalty, brand association and perceive quality. Data is gathered using purposive sampling. The finding revealed that kitabisacom is a top-of-mind platform related to digital donation and has a positive sentiment among the crowds
Pemodelan Spasial Kelembaban Tanah Berbasis Indeks Spektral dengan Integrasi Citra Satelit Multi Sensor
Full text linkTujuan: Keakuratan estimasi kelembaban tanah merupakan faktor penting dalam memonitor dan manajemen sumber daya air serta mitigasi dampak lingkungan. Pengukuran kelembaban tanah secara in-situ terbatas oleh biaya dan cakupan spasial yang rendah. Karenanya, integrasi data iklim dan citra satelit menjadi alternatif yang menarik untuk meningkatkan keakuratan estimasi kelembaban tanah. Penelitian ini mengembangkan model spasial kelembaban tanah dengan menggabungkan data iklim (suhu permukaan tanah dan curah hujan) dan indeks spektral dari citra satelit multi-sensor, termasuk Landsat 8 dan Sentinel-2, serta menggunakan algoritma Random Forest untuk klasifikasi kelembaban tanah. Hasil penelitian menunjukkan bahwa pendekatan ini menghasilkan peta kelembaban tanah dengan akurasi Overall Accuracy (OA) sebesar 0.8 dan kappa 0.75 untuk Random Forest, dan akurasi OA sebesar 0.93 dan kappa 0.92 untuk Gradient Boosting. Penelitian ini menyimpulkan bahwa integrasi data iklim dan citra satelit multi-sensor secara signifikan meningkatkan akurasi prediksi kelembaban tanah, memberikan manfaat signifikan bagi perencanaan dan pengelolaan lahan
Pengembangan Website untuk Sistem Pengontrolan Reservoir Air Bersih Berbasis IoT pada Bandung City View I
Full text linkPerumahan Bandung City View I (BCV I) sering menghadapi masalah meluapnya air di reservoir atas, terutama saat penggunaan air warga rendah pada malam hari. Untuk mengatasi masalah ini, dikembangkan sebuah sistem pengontrolan reservoir air berbasis IoT yang dapat beroperasi secara kontinu selama 24 jam. Sistem ini menggunakan perangkat keras yang aman dan dapat diakses melalui web dan aplikasi mobile untuk mempermudah proses pemantauan dan pengontrolan reservoir air secara jarak jauh dan real-time. Pengembangan website untuk sistem ini melibatkan penggunaan HTML, CSS, dan JavaScript di bagian frontend, serta Laravel framework di bagian backend. Firebase Realtime Database digunakan untuk penyimpanan data dan sinkronisasi real-time. Pengujian sistem menunjukkan bahwa website yang dikembangkan dapat mengontrol pompa dan memonitor kondisi reservoir dengan efektif, mengurangi pemborosan air, dan menurunkan biaya operasional. Hasil ini mengindikasikan bahwa sistem pengontrolan reservoir berbasis IoT yang diakses melalui website dapat menjadi solusi yang efisien dan efektif dalam mengelola sumber daya air di perumahan BCV I
Performance Analysis of Power Link Budget and Rise Time Budget to Support Fiber Optic Connectivity Telkom University
Full text linkFaculty of Applied Sciences, Telkom University has an Optical Communication System Laboratory designed as a supporting facility for the Optical Communication System course. One of the main obstacles is that this laboratory does not yet have a miniature Fiber to the X (FTTX) network like the optical cable-based internet network topology owned by internet service providers, resulting in a digital divide and limited practical experience for students. To overcome this problem, the development of an optical cable layout on a special FTTX network was applied to the Optical Communication System laboratory, so that participants understand the concept of Optical Distribution Cabinet (ODC) to Optical Distribution Point (ODP). The results of this study indicate that the fiber optic cable layout has succeeded in connecting the Optical Line Termination (OLT) at the Faculty of Applied Sciences to the Optical Distribution Point (ODP) 800 meters away (Hotel Lingian), as well as connecting to several laboratories in the Faculty of Applied Sciences environment that are connected to the Optical Distribution Center (ODC). The results of the Power Link Budget measurements for Downlink and Uplink and Bit Error Rate have values of -23.920 dBm, -24.631 dBm, respectively. While the Rise Time Budget value in uplink, downlink conditions with a value of 0.334 ns and 0.426 ns and the results of the Bit Error Rate (BER) are 16.37 × 10^(-13) and 15.25 × 10^(-12). The measurement value shows that the design has met the standards of the existing value parameters.