Garuda - Garba Rujukan Digital

Simulasi Channel Coding Pada Sistem DVB-C (Digital Video Broadcasting-Cable) dengan Kode Reed Solomon Ruliyanto Ruliyanto; Idris Kusuma
Jurnal Ilmiah Giga Vol 19, No 2 (2016): Volume 19 Edisi 2 Tahun 2016
Publisher : Universitas Nasional

Digital Video Broadcasting (DVB) adalah salah satu sistem yang digunakanuntuk mentransmisikan siaran TV digital hingga ke end-user. Dengan teknologi digital,DVB dapat memanfaatkan penggunaan bandwidth secara lebih efisien. Salah satunyaadalah DVB-C (Digital Video Broadcasting-cable). Dalam simulasi ini membandingkanperforma antara sistem DVB-C (Digital Video Broadcasting-Cable) tanpa Reed Solomondengan DVB-C (Digital Video Broadcasting-Cable) yang menggunakan metode ReedSolomon. Hasil penelitian menunjukkan bahwa Reed Solomon mampu memperbaikikinerja sistem.

Simulasi Dan Analisa Efek Doppler Terhadap OFDM Dan MC-CDMA Ruliyanto Ruliyanto; Rianto Nugroho
Jurnal Ilmiah Giga Vol 18, No 1 (2015): Volume 18 Edisi 1 Tahun 2015
Publisher : Universitas Nasional

Pada penelitian ini dilakukan Simulasi dan Analisa efek Doppler terhadapOFDM dan Multi carrier CDMA yang menggunakan frekuensi carrier 900 MHz dan 1800MHz pada kanal AWGN dengan maksud untuk menghitung pengaruh doppler pada BER (BitError Rate) pada kecepatan doppler 20 m/s atas penerimaan OFDM dan MC-CDMA.Simulasi dan Analisa ini menggunakan piranti lunak Javascript untuk mendapatkanperbandingan jumlah kesalahan bit (Bit Error Rate) pada OFDM dan MC-CDMA. Dari hasilsimulasi dengan menggunakan 2 jenis frekuensi carrier yang berbeda serta menggunakan Eb/ No dari 1 dB hingga 20 dB maka BER pada MC-CDMA lebih bagus dari OFDM. Hal initerlihat dari hasil BER yang dihasilkan, misalnya pada nilai Eb / No = 12 dB dengan frekuensicarrier 1800 MHz, maka untuk OFDM memiliki nilai BER = 0.0159 sedangkan pada MCCDMAmemiliki BER = 0.0006.

Pengaruh Ketidakseimbangan Beban Terhadap Arus Netral dan Arus Ground pada Trafo 1 dan Trafo 2 pada Beban Puncak Sesaat Ruliyanto Ruliyanto
Jurnal Ilmiah Giga Vol 23, No 1 (2020): Volume 23 Edisi 1 Tahun 2020
Publisher : Universitas Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47313/jig.v23i1.867

Transformator atau trafo adalah salah satu komponen utama peralatan gedung untuk menurunkan tegangan sesuai dengan kebutuhan. Permasalahan yang sering dijumpai adalah masalah ketidakseimbangan beban. Umumnya penyebab ketidakseimbangan adalah pada beban-beban satu fasa pada jaringan. Akibat ketidakseimbangan beban tersebut munculah arus di netral trafo. Arus yang mengalir di netral trafo ini menyebabkan terjadinya losses (rugi-rugi), yaitu losses akibat adanya arus netral pada penghantar netral trafo dan losses akibat arus netral yang mengalir ke ground. Setelah dianalisis, terjadi ketidakseimbangan beban pada Trafo 1 sebesar 5.23%, akan berakibat muncul arus netral IN sebesar 300 ampere, dan losses akibat arus netral IG yang mengalir ke tanah sebesar 0.15%. Kapasitas daya yang terpakai saat ini sebesar 84.65%.

Forecast of COVID-19 Cases in Indonesia with the Triple Exponential Smoothing Algorithm Ruliyanta Ruliyanta; Endang Retno Nugroho
Jurnal Ilmiah Giga Vol 23, No 2 (2020): Volume 23 Edisi 2 Tahun 2020
Publisher : Universitas Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47313/jig.v23i2.933

The Coronavirus (SARS-CoV-2), also known as COVID-19, has brought a worldwide threat to the living. The whole world is making extraordinary efforts to combat the spread of this deadly disease in terms of infrastructure, finances, data sources, protective equipment, life risk treatment, and several other resources. Artificial intelligence researchers focus their knowledge of expertise on developing mathematical models to analyze this epidemic situation using shared national data. To contribute to the welfare of the living community, this article proposes to utilize the Triple Exponential Smoothing algorithm to predict the development of COVID-19 throughout the country by utilizing real-time information from the Task Force for the Acceleration of Handling of Coronavirus Disease 2019 in Indonesia. Based on forecasting results, in Indonesia by the end of 2020, COVID-19 will continue to grow significantly, the number of confirmed COVID-19 people is 386,571 people with a death toll of 15,622.

Rancang Bangun Antena Mikrostrip Pattch Rectangular Array 4x1 pada Frekuensi 1800 MHz-2300 MHz Ruliyanta Ruliyanta; Endang Retno Nugroho
Jurnal Ilmiah Giga Vol 24, No 1 (2021): Volume 24 Edisi 1 Tahun 2021
Publisher : Universitas Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47313/jig.v24i1.1144

4G network is a technology that is currently being developed, known as LTE or 4G. An antenna microstrip for 4G technology is used in this paper. The antenna designed to resonate at a frequency of 1800 MHz-2300 MHz. The antenna design will use FR-4 for its substrate which functions as a dielectric for the antenna. The design is done using the help of CST Studio Suite 2014 software and NI AWR Design Environment v.12 to get the desired antenna characteristics through simulation. From our research we obtained the antenna characteristics such as return loss, VSWR (Voltage Standing Wave Ratio), gain, and bandwidth. In this research, a 4×1 patch rectangular microstrip array antenna has been designed and built that works at a frequency of 2.05 GHz for 4G technology. The antenna design uses the FR-4 for its substrate which functions as a dielectric for the antenna. The design is carried out with the help of CST Studio Suite software to obtain the desired antenna characteristics through simulation. From the research results obtained antenna characteristics such as return loss of -25.225 dB. VSWR (Voltage Standing Wave Ratio) of 1.15, the gain of 3.1 dBi, and bandwidth of 500 MHz with a 4×1 rectangular array antenna design.

Load Flow Analysis Capacitor Bank dengan Metode Konpensasi Individual dan Konpensasi Global Ruliyanta Ruliyanta; R.A. Suwodjo Kusumoputro; Idris Kusuma; Adhyarta Keraf
Jurnal Ilmiah Giga Vol 25, No 1 (2022): Volume 25 Edisi 1 Tahun 2022
Publisher : Universitas Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47313/jig.v25i1.1591

Abstract. Large buildings use lots of electrical equipment. The equipment includes air conditioning systems, building transportation, pumps, and others. One of the problems often encountered is the emergence of a decrease in power factor due to inductive loads. These induction machines cause this inductive load. One way to overcome this problem, Capacitor Bank is needed. The building that we observed is a building that has been operating for more than 20 years and has undergone a Single Line Diagram (SLD) change, where the capacitor bank does not work properly so the power factor is close to 0.85. This study rearranges the SLD according to the latest electrical loads in the building. The new SLD results are simulated using the Load Flow Analysis method with ETAP software, to achieve a quality factor of 0.99. In the Individual Compensation Method, it produces a savings of 13.9 kW, and this will result in a return on investment in the 40th month, and in the 2nd method, we use the Global Compensation Method which results in an improvement of 9.7 kW and a return on investment in the 57th month. Abstrak. Pada gedung-gedung besar menggunakan peralatan listrik. Peralatan tersebut seperti sistem tata udara, transportasi gedung, pompa dan lain-lain. Salah satu permasalahan yang sering dijumpai adalah timbulnya penurunan faktor daya akibat beban induktif. Beban induktif ini disebabkan oleh mesin-mesin induksi. Salah satu cara untuk mengatasinya adalah dengan menambahkan Capacitor Bank. Gedung yang kami teliti adalah gedung yang sudah beroperasi lebih dari 20 tahun dan sudah mengalami perubahan Single Line Diagram (SLD), selain itu capasitor bank tidak bekerja dengan baik sehingga faktor daya mendekati 0.85. Penelitian ini menyusun ulang SLD sesuai dengan beban listrik terbaru dalam gedung. Hasil SLD yang baru kami simulasikan dengan metode Load Flow Analysis dengan perangkat lunak ETAP, untuk mencapai faktor kualitas sebesar 0,99. Pada Individual Compensation Method menghasilkan penghematan sebesar 13.9 kW dan ini akan menghasilkan return of investment pada bulan ke-40 dan pada metode ke-2 kami pakai Global Compencsation Method yang menghasilkan perbaikan 9.7 kW dan return of investment di bulan ke-57.

Adaptive Wi-Fi offloading schemes in heterogeneous networks, the survey Ruliyanta Ruliyanta; Mohd Riduan Ahmad; Azmi Awang Md Isa
Indonesian Journal of Electrical Engineering and Computer Science Vol 28, No 1: October 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v28.i1.pp254-268

At present, the need for data traffic is experiencing tremendous growth. The growth of smartphones technology offers new applications. On the other hand, the growth in cellular network access infrastructure has not been able to keep up with the increasing demand for data package services. For this reason, Wi-Fi offloading is needed, namely cellular users, using Wi-Fi access for their data needs. In 2016, global data communication traffic growth reached 63%. Many researchers have proposed the adaptive wireless fidelity (Wi-Fi) offloading (AAWO) algorithm to transfer data on heterogeneous networks. In this study, the proposed adaptive incentive scheme is classified, to obtain an adaptive scheme based on cost, energy, service quality, and others. From the survey results shown, there is no proposed adaptive algorithm based on the quality of experience (QoE). This provides an opportunity for further research where the Wi-Fi offloading scheme uses the perspective user or user experient options. In addition, open research uses artificial intelligence and machine learning methods as adaptive methods.

Perancangan Antena Pesawat Tanpa Awak Menggunakan ANSYS High-Frequency Structure Simulator Ruliyanta Ruliyanta; Muhammad Fahrurozi; Herry Satria Utama
Jurnal Ilmiah Giga Vol 25, No 2 (2022): Volume 25 Edisi 2 Tahun 2022
Publisher : Universitas Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47313/jig.v25i2.1914

Using crewless aircraft or Unmanned Aerial vehicles (UAV) is rife in the civil and military world. The problem that often occurs is that the UAV has disconnected from the control center. One of the reasons was that the aircraft was operating outside the radio control center's range. This study aims to design a control antenna with a higher gain than the previous research antenna, which is used as a reference. The method we used is designing a 2×8 circular array microstrip antenna using the Ansys high-frequency structure simulator (HFSS) software. The result gives a return loss value of -30.25 dB, a voltage standing wave ratio (VSWR) of 1.11, and a bandwidth of 512,1 MHz. The amount of gain is 12.94 dB. The magnitude of the reflection coefficient of the designed antenna is 0.017. This value means that the amount of power reflected by the designed antenna is 1.7%, or the antenna is capable of capturing signals of up to 98.3%.

PELATIHAN PENINGKATAN PENGETAHUAN OPERATOR GEDUNG DI KUALA TANJUNG KABUPATEN BATUBARA Ruliyanta Ruliyanta; Puji Hartono; Wismanto Setyadi
JMM (Jurnal Masyarakat Mandiri) Vol 6, No 6 (2022): Desember
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v6i6.11124

Abstrak: Gedung Inalum Kuala Tanjung adalah gedung termegah di kabupaten Batubara, Sumatera Utara. Gedung diresmikan pada 6 Januari 2021 oleh menteri BUMN. Dengan mengusung Smart and Green Building, pimpinan Inalum memiliki komitmen tinggi atas nilai-nilai keramahan lokal. Tenaga kerja yang diserap memprioritaskan warga lokal. Permasalahan timbul ketika tenaga lokal yang direkrut minim pengalaman dalam mengoperasikan gedung bertingkat tinggi. Tujuan kegiatan ini untuk memberikan pelatihan kepada karyawan pengelola gedung agar memahami instalasi listrik dan peralatan pendukung. Metode yang digunakan adalah dengan pelatihan dan praktek ke lokasi peralatan yang mendukung operasional gedung Inalum. Pelatihan diikuti oleh 12 anggota teknisi, 4 orang petugas keamanan, 5 orang petugas housekeeping dan 2 orang petugas gondola. Kegiatan dilaksanakan pada 12 Juli 2021. Capaian kegiatan ini meningkatkan soft skill yang semula test awal hasilnya 42% menjadi 88% saat post test.Abstract: The Inalum building Kuala Tanjung is the biggest in the Batubara district, North Sumatra. The Minister of SOEs inaugurated the building on January 6, 2021. By carrying out Smart and Green Building, Inalum's leadership is highly committed to local hospitality values. The absorbed workforce prioritizes residents. Problems arise when recruited local workers lack experience in operating high-rise buildings. The purpose of this activity is to provide training to building management employees to understand electrical installations and supporting equipment. The method used is by training and practicing the location of the equipment that supports the operation of the Inalum building. The training was attended by 12 technicians, four securities, five housekeeping, and two gondola man. The activity was carried out on July 12, 2021. The achievement of this activity increased soft skill from the initial test, and the results were 42% to 88% during the post-test.

PENDAMPINGAN PENGUKURAN BEBAN LISTRIK PADA MASA PANDEMI COVID-19 DI APARTEMEN Ruliyanta Ruliyanta; E. R. Nugroho; I Wayan Wiagra; R. A. Suwodjo Kusumoputro
JMM (Jurnal Masyarakat Mandiri) Vol 7, No 4 (2023): Agustus
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v7i4.15407

Abstrak: Dampak Pemberlakuan Pembatasan Kegiatan Masyarakat di Indonesia mempengaruhi tingkat hunian apartemen. Ketidakmerataan hunian berakibat beban listrik di apartemen tidak seimbang. Ketidakseimbangan beban listrik akan menghasilkan arus listrik yang mengalir pada kabel netral. Ini merupakan kerugian besar yang harus dibayar oleh pelanggan. Dampak lain dari ketidakseimbangan adalah kinerja perlatan listrik menjadi tidak optimal. Kegiatan ini bertujuan untuk melakukan pendampingan pengukuran beban listrik di Apartemen Pancoran Riverside Jakarta. Metode yang digunakan dengan mengukur beban listrik fasa R, S dan T. Keberhasilan kegiatan ini dilihat dari output yang dihasilkan berupa pengukuran kestidakseimbangan beban. Keyidakseimbangan ini akibat terjadinya pola tingkat hunia akibat adanya Pandemi COVID-19. Kami menganalisis ketidakseimbangan beban ketiga fasa tersebut. Hasilnya menunjukkan bahwa ketidakseimbangan lebih dari 5%.Abstract: The impact of imposition of restrictions on community activities in Indonesia affects the apartment occupancy rate. Inequality of occupancy results in an unbalanced electrical load in the apartment. An imbalance in the electrical load will result in an electric current flowing in the neutral wire. This is a huge loss to be paid by the customer. Another impact of the imbalance is that the performance of electrical equipment is not optimal. This activity aims to aid in measuring the electrical load at the Pancoran Riverside Apartment in Jakarta. The method used is to measure the electrical load of the R, S, and T phases. We analysed the load imbalance of the three phases. The results show that the imbalance is more than 5%.

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