Metode Komputasi Murah Untuk Sinkronisasi Fasa Optik Pada Optical Beamforming Networks

Optical Beamforming Networks (OBFNs) is used to optimized the received signal power in airplane-satellite communication by controlling the signal beams towards the desired direction.  The control of these OBFNs is a difficult and very complex nonlinear problem. The complexity of OBFN can be reduced by lowering the bandwidth of the modulated optical signals at its inputs. It can be achieved by performing optical single-sideband suppressed-carrier (SSB-SC) modulation. However, there is potential problem due to the fact that the phase relation between the optical carrier and the remaining sideband is lost when the group delay response is only optimized for the sideband frequency range. Optical phase synchronization is used to correct this issue by adding extra phase shifters. However, there is not any simple yet effective method to determine the value of the extra phase shifters needed for a certain OBFN. This paper propose a simple and computationally cheap feedback approximation approach to solve this problem

Analisis Kebutuhan untuk Membangun Media Pembelajaran Maya yang Mendukung Proyek Energi Baru dan Terbarukan: Analisis Kebutuhan Pengguna

Energy security has become the main issue for Indonesia Government because Indonesia is targeted to be independent in energy field.To reach the goals NRE USAge, there should be cooperations amongst all party : government, society, academicians as well as corporates. Virtual Learning Environment (VLE) is a powerful application to deliver knowledge in the digital age while contributes to educate society about New and Renewable Energy (NRE). However, user requirements are needed before developing VLE to reveal existing conditions and understand the users' behaviour. This paper purposes to understand the user requirements, who are university students, to contribute to NRE project. Research methods used are interview, observation and questionnaire. Interview was conducted with Lentera Bumi Nusantara who develops NRE technology especially wind turbine in Indonesia. Observation was done in Lentera Bumi Nusantara's office and questionnaire was distributed amongst 92 students in Universitas Pertamina, Jakarta, Indonesia. The results show that university students are human resources needed in NRE project. Then, learning materials regarding how to build blade and wind turbine have not distributed to others. Furthermore, results show that 84% of university students are ready to contribute in NRE project. However, only 37% of university students own original idea for NRE project related to their academic background. To build the VLE to support NRE projects, there should be menu for university students to discuss online so they can share ideas regarding NRE and menu for contributing to NRE project in Indonesia

Penerapan Metode Genetic Alghorithm untuk Meminimalkan Biaya Perawatan Sistem Pembangkit Energi Hibrid Solar Panel dan Turbin Angin

Sebagai renewable energy, Teknologi hybrida solar panel dan wind tubine menjadi salah satu sistem yang dapat dipergunakan di masa mendatang, pada sistem ini ketika siang maupun malam alat dapat bekerja sehingga menghasilkan sumber energi secara berkesinambungan. Untuk dapat menyediakan cukup energi listrik untuk pemakaian seharian, perlu menentukan jumlah panel surya dan turbin angin yang cukup. Masing-masing panel surya dan turbin angin menghasilkan energi listrik yang berbeda, serta biaya perawatan yang berbeda pula. Oleh sebab itu, maintenance system dari alat ini harus diperhatikan agar tidak memakan banyak biaya, namun tetap dapat menyediakan energi listrik yang cukup. Pada metode yang disimulasikan pada matlab, Genetic Alghorithm(GA) dan Fmincon dipilih karena pada 2 metode ini fungsi global minimum bisa didapatkan dengan berbagai iterasi maupun generasinya. Kedua metode ini dapat menentukan jumlah panel surya dan turbin angin yang tepat agar kebutuhan listrik dapat terpenuhi serta dengan biaya perawatan yang minimal

Feasibility Study: Online Learning for Supporting Rural Renewable Energy Projects

Indonesian government set the target for new and renewable energy (NRE) is expected to be 23% in 2025 and 31% in 2050, where in 2017, NRE was only 12,5%. Building a new and renewable energy project is the easy part. Keeping the generator working over time, however, is a complex business that requires money, training and innovative thinking. One of essential parameters that can help in achieving a successful sustainable project is community involvement. If the community feels a strong sense of ownership, they'll see their generator as a critical asset to everyone and take good care of it collectively. Training and educating the community about how to take care of the generator after the project construction has completed becomes important. Considering Indonesia's geographical location, e-learning might be a potential tool to reduce training and education cost in new and renewable project. This study aims to identify whether e-learning is an effective and efficient method to deliver training material and educate local people which will improve renewable energy project's sustainability in Indonesia