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All Journal Management Analysis Journal Frontier Energy System and Power Engineering Efficient: Indonesian Journal of Development Economics
Fahmi, Tubagus
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Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy

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Optimizing Single Axis Tracking for Bat Algorithm-based Solar Cell Ali, Machrus; Fahmi, Tubagus; Wida Khaidir, Delief; Nurohmah, Hidayatul; Budiman, Budiman
Frontier Energy System and Power Engineering Vol 2, No 2 (2020): JULY
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um049v2i2p1-5

Abstract

Adding the solar tracking control system was an attempt to increase the efficiency of solar panels. The solar tracking control system was a control system that follows the sun position. The purpose of this solar tracking system was to position the cross-section always to face the sun. The Single Axis system in solar tracking was intended to follow the sun’s angle or solar azimuth angle from the east to the west. There needed a control optimization to get the position as desired. Optimization often used artificial intelligence to obtain the automatic best optimization, such as Bat Algorithm (BA). This research compared several methods: without control, using PID control, using PID-Auto control, and using PID-BA control. The simulations showed that the smallest elevation angle deviation was found in PID-BA controller. In conclusion, PID-BA was the best controller in this research. This research could be used as a future reference with other controllers to get the most optimized controller.
Dampak Aktivitas Objek Wisata Umbul Sidomukti terhadap Pendapatan Masyarakat Desa Sidomukti Fahmi, Tubagus
Efficient: Indonesian Journal of Development Economics Vol 4 No 1 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/efficient.v4i1.43735

Abstract

The purpose of this study was to determine the impact of the Umbul Sidomukti tourist attraction on the income of the village community. Data collection was carried out by interview method. Interviews were conducted with informants who had been determined by the researcher. The informants used in this study were the manager of the Umbul Sidomukti tourist attraction, the Sidomukti Village Government, the Sidomukti Village Community, and the Semarang Regency Tourism Office. The research method used is a qualitative approach using qualitative descriptive analysis. The data analysis technique uses the Delphi method, the Delphi method is a survey technique that involves expert opinion and the like which is directly involved in demographic, political, economic and technological issues. The results showed that the income of the Sidomukti Village community on the activities of the Umbul Sidomukti Tourism Object varied. People who work to maximize tourist objects, such as traders in tourism, tourism employees, self-employed people, have increased their income with the existence of tourism. Meanwhile, people who work as traders outside of tourism and farmers have no increase in income. Tujuan dari penelitian ini adalah untuk mengetahui dampak aktivitas objek wisata Umbul Sidomukti terhadap pendapatan masyarakat desa. Pengumpulan data dilakukan dengan metode wawancara. Wawancara dilakukan terhadap informan yang sudah ditentukan oleh peneliti. Informan yang digunakan dalam penelitian ini adalah Pengelola objek wisata Umbul Sidomukti, Pemerintah Desa Sidomukti, Masyarakat Desa Sidomukti, dan Dinas Pariwisata Kabupaten Semarang. Metode penelitian yang digunakan berupa pendekatan kualitatif dengan menggunakan analisis deskriptif kualitatif. Teknik analisis data menggunakan metode delphi, metode delphi merupakan teknik survei yang melibatkan pendapat pakar dan sejenisnya yang terlibat langsung bagi isu demografis, politik, ekonomi, dan teknologi. Hasil penelitian menunjukan pendapatan masyarakat Desa Sidomukti terhadap aktivitas Objek Wisata Umbul Sidomukti bervariasi. Masyarakat yang bekerja memaksimalkan objek wisata seperti pedagang di dalam wisata, pegawai wisata, wiraswasta pendapatannya ikut meningkat dengan adanya wisata. Sedangkan masyarakat yang bekerja sebagai pedagang di luar wisata dan petani pendapatanya tidak ikut meningkat.
The Effect of Perceived Usefulness and Perceived Risk to the Utilization of Internet Banking (Study on BRI Internet Banking Customers in Semarang City) Fahmi, Tubagus; Wiratama, Bayu
Management Analysis Journal Vol 7 No 2 (2018): Management Analysis Journal
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/maj.v7i2.27227

Abstract

This study aims to analyze the effect of perceived usefulness and perceived risk of consumers to internet banking utilization. The population of this study is the bank’s customers who use BRI’s internet banking in semarang city with the number of samples are 50 respondents by using purposive sampling technique. The result of this study shows that the significance value of simultaneous hypothesis test < 0.05, thus Ho is rejected. It means that Ho stating both perceived usefulness and perceived risk variable significantly affect to the participation of BRI bank members in Semarang city is accepted. In addition, the partial hypothesis of t-test for the perceived usefulness variable is 5.949 with the significance value < 0.05, thus Ho is rejected. The test result of perceived risk variable obtained t count value equal to 3.925 with the significance value < 0.05, then Ho is rejected. It means that the performance of hypothesis (H1) stating the perceived usefulness and perceived risk variable significantly influence to the success of BRI bank in Semarang city is accepted. The conclusion of this study is that the higher perceived usefulness and perceived risk to the consumer will enhance the success of internet banking utilization. The recommendation for the future research is that they should consider other variables which have effect to the internet banking utilization.
Dampak Aktivitas Objek Wisata Umbul Sidomukti terhadap Pendapatan Masyarakat Desa Sidomukti Fahmi, Tubagus
Efficient: Indonesian Journal of Development Economics Vol 4 No 1 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/efficient.v4i1.43735

Abstract

The purpose of this study was to determine the impact of the Umbul Sidomukti tourist attraction on the income of the village community. Data collection was carried out by interview method. Interviews were conducted with informants who had been determined by the researcher. The informants used in this study were the manager of the Umbul Sidomukti tourist attraction, the Sidomukti Village Government, the Sidomukti Village Community, and the Semarang Regency Tourism Office. The research method used is a qualitative approach using qualitative descriptive analysis. The data analysis technique uses the Delphi method, the Delphi method is a survey technique that involves expert opinion and the like which is directly involved in demographic, political, economic and technological issues. The results showed that the income of the Sidomukti Village community on the activities of the Umbul Sidomukti Tourism Object varied. People who work to maximize tourist objects, such as traders in tourism, tourism employees, self-employed people, have increased their income with the existence of tourism. Meanwhile, people who work as traders outside of tourism and farmers have no increase in income. Tujuan dari penelitian ini adalah untuk mengetahui dampak aktivitas objek wisata Umbul Sidomukti terhadap pendapatan masyarakat desa. Pengumpulan data dilakukan dengan metode wawancara. Wawancara dilakukan terhadap informan yang sudah ditentukan oleh peneliti. Informan yang digunakan dalam penelitian ini adalah Pengelola objek wisata Umbul Sidomukti, Pemerintah Desa Sidomukti, Masyarakat Desa Sidomukti, dan Dinas Pariwisata Kabupaten Semarang. Metode penelitian yang digunakan berupa pendekatan kualitatif dengan menggunakan analisis deskriptif kualitatif. Teknik analisis data menggunakan metode delphi, metode delphi merupakan teknik survei yang melibatkan pendapat pakar dan sejenisnya yang terlibat langsung bagi isu demografis, politik, ekonomi, dan teknologi. Hasil penelitian menunjukan pendapatan masyarakat Desa Sidomukti terhadap aktivitas Objek Wisata Umbul Sidomukti bervariasi. Masyarakat yang bekerja memaksimalkan objek wisata seperti pedagang di dalam wisata, pegawai wisata, wiraswasta pendapatannya ikut meningkat dengan adanya wisata. Sedangkan masyarakat yang bekerja sebagai pedagang di luar wisata dan petani pendapatanya tidak ikut meningkat.
Co-Authors Bayu Wiratama, Bayu Budiman Budiman Hidayatul Nurohmah, Hidayatul Machrus Ali Wida Khaidir, Delief