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Resonansi Bragg Pada Aliran Air Akibat Dinding Sinusoidal Di Sekitar Muara Sungai Noviantri, Viska
ComTech: Computer, Mathematics and Engineering Applications Vol 1, No 1 (2010): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v1i1.2165

Basically, the water wave (wave) that passes through uneven base will have a solution to the wave transmission and reflection. It has been found also that the sinusoidal basis with certain conditions can cause the Bragg resonance. This paper will show that the wave propagation through the wall of river water can also cause sinusoidal Bragg resonance. Bragg resonance will occur if the sinusoidal wall of the wave number twice the number of incoming waves. Both analytically and numerically, the river wall with amplitude sinusoidal small amplitude can be reduced significantly due to the Bragg resonance. More specifically, the situation would be different if we consider the river mouth in the form of a hard wall of the dam. The existence of the hard wall of the dam at the mouth of the river it can cause the amplitude of the waves crashing against the transmission of large dams increased many-fold.

Dasar Laut Sinusoidal Sebagai Reflektor Gelombang Noviantri, Viska
ComTech: Computer, Mathematics and Engineering Applications Vol 2, No 1 (2011): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v2i1.2781

This article discusses about the influence of sinusoidal sandbars towards the amplitude of incident wave. sinusoidal sandbars may lead to Bragg resonance. Basically, when a wave meets a different depth, it will scatter into a transmitted wave and a reflected wave. Bragg resonance happens when the wavelength of incident wave is twice of the wavelength of the periodic bottom disturbance. We apply the multi-scale asymptotic expansion to obtain the results. Eventually we find that a larger amplitude disturbance leads to larger reflected wave amplitude. This result explains that the sinusoidal sandbars indeed can reduce the amplitude of incident wave and protect a beach from large amplitude incident waves.

Bragg Resonance around the Coast of Hardwall Noviantri, Viska; Rachmawati, Ro?fah Nur
ComTech: Computer, Mathematics and Engineering Applications Vol 7, No 4 (2016): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v7i4.2547

Basically, when waves pass an uneven basis, then this wave will be split into transmission and reflection waves. First of all, it will be shown that a sinusoidal seabed can lead to the phenomenon of Bragg resonance. Bragg resonance occurs when the wave-length comes at twice the wave-length of a sinusoidal basis. The method used to obtain approximation solution is a multi-scale asymptotic expansion method. A research on the effect of Bragg resonance on sinusoidal basis had been studied. Sinusoidal basis can reduce the amplitude of the incoming wave so that the amplitude of the wave transmission is quite small. In these researcher, the coast is assumed ideal and can absorb all the energy of the wave transmission. If the beach can reflect waves, this indicates that the existence of sinusoidal basis is more harmful to the coast. This mechanism relies on the distance between the base sinusoidal and beaches. The present research will examined the influence of the base, when there was a beach of hard-wall on the right, which was perfectly capable of reflecting waves. Having regard to the phase difference, from super positioned waves when they hit the beach, so it can determine the safert and the most dangerous distance.

ANALISIS NUMERIK MODEL SEIQRS-V UNTUK PENYEBARAN VIRUS PADA JARINGAN KOMPUTER Febrian Yuwono; Viska Noviantri; Alexander A. S. Gunawan; Heri Ngarianto
Computatio : Journal of Computer Science and Information Systems Vol 2, No 2 (2018): COMPUTATIO : JOURNAL OF COMPUTER SCIENCE AND INFORMATION SYSTEMS
Publisher : Faculty of Information Technology, Universitas Tarumanagara

Penelitian ini menjelaskan mengenai model komplementer SEIQRS-V (Susceptible - Exposed - Infectious - Quarantined - Recovered - Vaccinated) yang digunakan untuk menganalisis kondisi jaringan di setiap waktu. Dengan menerjemahkan model komplementer menjadi sistem persamaan differensial, dapat diperoleh kondisi jaringan di setiap waktu dengan menggunakan metode numerik Runge-Kutta Fehlberg dan metode numerik Adam Bashforth Orde 3 yang diimplementasikan ke dalam aplikasi untuk analisis kondisi dan kestabilan jaringan komputer. Aplikasi analisis ini dibuat untuk menampilkan jumlah komputer pada setiap kelompok dalam bentuk tabel, grafik dua dimensi, maupun grafik tiga dimensi. Dengan menggunakan metode numerik yang diimplementasikan pada aplikasi ini, diharapkan pengguna dapat mensimulasikan kondisi jaringan komputer yang ada.

Resonansi Bragg Pada Aliran Air Akibat Dinding Sinusoidal Di Sekitar Muara Sungai Viska Noviantri
ComTech: Computer, Mathematics and Engineering Applications Vol. 1 No. 1 (2010): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v1i1.2165

Basically, the water wave (wave) that passes through uneven base will have a solution to the wave transmission and reflection. It has been found also that the sinusoidal basis with certain conditions can cause the Bragg resonance. This paper will show that the wave propagation through the wall of river water can also cause sinusoidal Bragg resonance. Bragg resonance will occur if the sinusoidal wall of the wave number twice the number of incoming waves. Both analytically and numerically, the river wall with amplitude sinusoidal small amplitude can be reduced significantly due to the Bragg resonance. More specifically, the situation would be different if we consider the river mouth in the form of a hard wall of the dam. The existence of the hard wall of the dam at the mouth of the river it can cause the amplitude of the waves crashing against the transmission of large dams increased many-fold.

Bragg Resonance around the Coast of Hardwall Viska Noviantri; Ro’fah Nur Rachmawati
ComTech: Computer, Mathematics and Engineering Applications Vol. 7 No. 4 (2016): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v7i4.2547

Basically, when waves pass an uneven basis, then this wave will be split into transmission and reflection waves. First of all, it will be shown that a sinusoidal seabed can lead to the phenomenon of Bragg resonance. Bragg resonance occurs when the wave-length comes at twice the wave-length of a sinusoidal basis. The method used to obtain approximation solution is a multi-scale asymptotic expansion method. A research on the effect of Bragg resonance on sinusoidal basis had been studied. Sinusoidal basis can reduce the amplitude of the incoming wave so that the amplitude of the wave transmission is quite small. In these researcher, the coast is assumed ideal and can absorb all the energy of the wave transmission. If the beach can reflect waves, this indicates that the existence of sinusoidal basis is more harmful to the coast. This mechanism relies on the distance between the base sinusoidal and beaches. The present research will examined the influence of the base, when there was a beach of hard-wall on the right, which was perfectly capable of reflecting waves. Having regard to the phase difference, from super positioned waves when they hit the beach, so it can determine the safert and the most dangerous distance.

Dasar Laut Sinusoidal Sebagai Reflektor Gelombang Viska Noviantri
ComTech: Computer, Mathematics and Engineering Applications Vol. 2 No. 1 (2011): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v2i1.2781

This article discusses about the influence of sinusoidal sandbars towards the amplitude of incident wave. sinusoidal sandbars may lead to Bragg resonance. Basically, when a wave meets a different depth, it will scatter into a transmitted wave and a reflected wave. Bragg resonance happens when the wavelength of incident wave is twice of the wavelength of the periodic bottom disturbance. We apply the multi-scale asymptotic expansion to obtain the results. Eventually we find that a larger amplitude disturbance leads to larger reflected wave amplitude. This result explains that the sinusoidal sandbars indeed can reduce the amplitude of incident wave and protect a beach from large amplitude incident waves.

ANALISIS NUMERIK MODEL SEIQRS-V UNTUK PENYEBARAN VIRUS PADA JARINGAN KOMPUTER Yuwono, Febrian; Noviantri, Viska; Gunawan, Alexander A. S.; Ngarianto, Heri
Computatio : Journal of Computer Science and Information Systems Vol. 2 No. 2 (2018): COMPUTATIO : JOURNAL OF COMPUTER SCIENCE AND INFORMATION SYSTEMS
Publisher : Faculty of Information Technology, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/computatio.v2i2.2347

Penelitian ini menjelaskan mengenai model komplementer SEIQRS-V (Susceptible - Exposed - Infectious - Quarantined - Recovered - Vaccinated) yang digunakan untuk menganalisis kondisi jaringan di setiap waktu. Dengan menerjemahkan model komplementer menjadi sistem persamaan differensial, dapat diperoleh kondisi jaringan di setiap waktu dengan menggunakan metode numerik Runge-Kutta Fehlberg dan metode numerik Adam Bashforth Orde 3 yang diimplementasikan ke dalam aplikasi untuk analisis kondisi dan kestabilan jaringan komputer. Aplikasi analisis ini dibuat untuk menampilkan jumlah komputer pada setiap kelompok dalam bentuk tabel, grafik dua dimensi, maupun grafik tiga dimensi. Dengan menggunakan metode numerik yang diimplementasikan pada aplikasi ini, diharapkan pengguna dapat mensimulasikan kondisi jaringan komputer yang ada.

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