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All Journal International Journal of Electrical and Computer Engineering Perfecting a Video Game with Game Metrics Bulletin of Electrical Engineering and Informatics AKSIOMA: Jurnal Program Studi Pendidikan Matematika Briliant: Jurnal Riset dan Konseptual Jurnal Mercumatika : Jurnal Penelitian Matematika dan Pendidikan Matematika M A T H L I N E : Jurnal Matematika dan Pendidikan Matematika Jurnal Kajian Matematika dan Aplikasinya ALINIER: Journal of Artificial Intelligence & Applications SinarFe7 Journal of Social Outreach
Vita Kusumasari
Universitas Negeri Malang
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Library & Information Science Mathematics Social Sciences

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Kekuatan Tidak Teratur Sisi Graph Hasil Operasi Kali Sisir pada Lintasan, Sikel, dan Bintang Mayta Budiarti; Vita Kusumasari; Desi Rahmadani
BRILIANT: Jurnal Riset dan Konseptual Vol 6, No 3 (2021): Volume 6 Nomor 3, Agustus 2021
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (718.526 KB) | DOI: 10.28926/briliant.v6i3.666

Abstract

Pelabelan graph adalah penugasan bilangan bulat ke titik-titik atau sisi-sisi atau keduanya dengan kondisi tertentu. Pemetaan himpunan titik pada graph G(V(G),E(G)) ke suatu bilangan bulat positif, yaitu f:V(G)→{1,2,...,k} disebut pelabelan-k titik. Pelabelan-k tidak teratur sisi dari graph G adalah pelabelan-k titik pada graph G jika untuk setiap dua sisi yang berbeda, yaitu vivj dan vi’vj’, mempunyai bobot yang berbeda, wf(vivj)≠wf(vi’vj’). Nilai minimum k sehingga graph G mempunyai pelabelan-k tidak teratur sisi disebut sebagai kekuatan tidak teratur sisi (edge irregularity strength) dari G dan dinotasikan dengan es(G). Hasil kali sisir dari dua graph G1 dan G2, dengan titik v∈V(G2), didefinisikan sebagai graph yang dibentuk dengan mengambil salinan G2,i dari G2 untuk setiap titik di V(G1) dan menempelkan G2,i ke G1 dengan menempelkan titik v ke titik i dari G1. Hasil kali sisir dari dua graph G1 dan G2 dinotasikan dengan G1⊳vG2. Penelitian ini bertujuan untuk menentukan nilai kekuatan tidak teratur sisi pada graph hasil operasi kali sisir pada lintasan, sikel, dan bintang.
LHCP four patches stack triangular truncated antenna using corporate feed microstrip-line for CP-SAR sensor Muhammad Fauzan Edy Purnomo; Vita Kusumasari; Rudy Yuwono; Rahmadwati Rahmadwati; Rakhmad Romadhoni; Azizurrahman Rafli; Yuyu Wahyu; Akio Kitagawa
International Journal of Electrical and Computer Engineering (IJECE) Vol 11, No 5: October 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v11i5.pp4125-4134

Abstract

In this paper, we acquire the configuration of the left-hand circular polarization (LHCP) array four patches stack triangular truncated microstrip antenna. This construction use the basic corporate feed microstrip-line with modified lossless T-junction power divider on radiating patch for circularly polarized-synthetic aperture radar (CP-SAR) sensor embedded on unmanned aerial vehicle (UAV) with compact, small, and simple configuration. The design of circular polarization (CP) is realized by truncating the whole three tips and adjusting the parameters of antenna at the target frequency, f = 5.2 GHz. The results of characteristic performance and S-parameter for the LHCP array four patches stack antenna at the target frequency show successively about 9.74 dBic of gain, 2.89 dB of axial ratio (Ar), and -10.91 dB of S-parameter. Moreover, the impedance bandwidth and the 3 dB-Ar bandwidth of this antenna are around 410 MHz (7.89%) and 100 MHz (1.92%), respectively.
Development of triangular array eight patches antennas for circularly-polarized synthetic aperture radar sensor Muhammad Fauzan Edy Purnomo; Vita Kusumasari; Edi Supriana; Rusmi Ambarwati; Akio Kitagawa
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 2: April 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v18i2.14759

Abstract

In this paper, we obtain the left-handed circularly polarized (LHCP) and right-handed circularly polarized (RHCP) of triangular array eight patches antennas using corporate feeding-line for circularly polarized-synthetic aperture radar (CP-SAR) sensor embedded on unmanned aerial vehicle (UAV) with compact, simple, and efficient configuration. Although the corporate feeding-line design has already been developed, its design was for the side antenna view of 0° and only produced one of LHCP or RHCP instead of both. Here, the design for LHCP and RHCP eight patches array fed by corporate feeding-line having the side antenna view of 36° at f=1.25 GHz for CP-SAR are discussed. We use the 2016 version of computer simulation technology (CST) to realize the method of moments (MoM) for analyzing. The performance results, especially for gain and axial ratio (Ar) at resonant frequency are consecutively 13.46 dBic and 1.99 dB both of LHCP and RHCP. Moreover, the 12-dBic gain-bandwidth and the 3-dB Ar-bandwidth of them are consecutively around 38 MHz (3.04%) and 6 MHz (0.48%). Furthermore, the two-beams appeared at boresight in elevation plane for average beamwidth of 12 dBic-gain and the 3 dB-Ar LHCP and RHCP have similar values of around 12° and 46°, respectively.
Development of patch stack antenna for CP-SAR sensor Muhammad Fauzan Edy Purnomo; Vita Kusumasari; Rusmi Ambarwati; Sigit Kusmaryanto; Sholeh Hadi Pramono; Dwi Fadila Kurniawan; Akio Kitagawa
Bulletin of Electrical Engineering and Informatics Vol 10, No 1: February 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v10i1.2672

Abstract

In this paper, we obtain the basic configuration of the left-hand circular polarization (LHCP) array two patches stack triangular truncated microstrip antenna. This construction use the basic corporate feed microstrip-line with modified lossless T-junction power divider on radiating patch for circularly polarized-synthetic aperture radar (CP-SAR) sensor embedded on airspace with compact, small, and simple configuration. The design of Circular Polarization (CP) is realized by truncating the whole three tips and adjusting the parameters of antenna at the resonant frequency, f=5.2 GHz. The results of characteristic performance and S-parameter for the LHCP array two patches stack antenna at the resonant frequency show successively about 7.24 dBic of gain, 1.99 dB of axial ratio (Ar), and -11.43 dB of S-parameter. Moreover, the impedance bandwidth and the 3 dB-Ar bandwidth of this antenna are around 560 MHz (10.77%) and 50 MHz (0.96%), respectively.
Metode Level Set pada Hyperbolic Mean Curvature Flow Vita Kusumasari; Makbul Muksar; Tjang Daniel Chandra; Kridha Pusawidjayanti
Jurnal Mercumatika : Jurnal Penelitian Matematika dan Pendidikan Matematika Vol 5, No 2 (2021)
Publisher : Universitas Mercu Buana Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26486/jm.v5i2.1437

Abstract

Pada artikel ini, metode level set diterapkan pada masalah pergerakan kurva berdasarkan hyperbolic mean curvature flow. Simulasi yang dilakukan meliputi masalah hyperbolic mean curvature flow dan hyperbolic mean curvature flow dengan kendala. Realisasi pergerakan kurva pada kedua permasalahan masing-masing menggunakan algoritma Hyperbolic MBO (HMBO) dan algoritma HMBO yang telah dimodifikasi untuk masalah dengan kendala. Kurva initial pada kedua permasalahan berupa lingkaran. Hasil simulasi yang ditampilkan berupa plot level set nol dan plot tiga dimensi. Hasil pergerakan kurva pada kedua permasalahan menunjukkan bahwa kurva semakin menyusut. Untuk masalah hyperbolic mean curvature flow, kurva akan menyusut dan menghilang. Sedangkan pada masalah hyperbolic mean curvature flow dengan kendala, kurva akan menyusut dan berhenti bergerak setelah menyentuh kurva kendala.
ESTIMASI MATEMATIS UNTUK JUMLAH PENGIRIMAN PAKET BARANG DI JNE MOJOKERTO DENGAN METODE DOUBLE EXPONENTIAL SMOOTHING Dwi Roudhotillah; Vita Kusumasari; Mochammad Hafiizh; Imam Supeno
Jurnal Kajian Matematika dan Aplikasinya (JKMA) Vol 2, No 1 (2021): January
Publisher : UNIVERSITAS NEGERI MALANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um055v2i12021p19-23

Abstract

The increasing number of package shipments of goods at JNE Mojokerto could highly affect the delays in time delivery. It is strongly necessary to mathematically estimate the number of package shipments of goods for the next month to prepare the resources that are needed by the company. The estimated number of deliveries is calculated by applying the Double Exponential Smoothing method. The monthly data obtained from January 2017 until December 2019 are used in that method, while the 4 months data from January 2020 until April 2020 are used to validated the estimation results. This result shows that the estimation for 4 months from January 2020 until April 2020 are 86421, 87787, 89154, and 90520 respectively. From the validation, the mean absolute percentage error 8%. 
STUDI ALGORITMA IGVNS, ALGORITMA GVNS, DAN ALGORITMA ABC PADA MULTIPLE TRIP VEHICLE ROUTING PROBLEM (MTVRP) Nurul Faridhatul Aini; Vita Kusumasari; Desi Rahmadani
Jurnal Kajian Matematika dan Aplikasinya (JKMA) Vol 2, No 2 (2021): July
Publisher : UNIVERSITAS NEGERI MALANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um055v2i22021p26-31

Abstract

The Multiple Trip Vehicle Routing Problem (MTVRP) is one of the VRP variants with vehicle capacity constraints, and the limited number of vehicles allows each vehicle to distribute more than one route so as to minimize the number of vehicles used. The algorithm used in this study is the Improved General Variable Neighborhood Search (IGVNS) algorithm. The IGVNS algorithm is a hybrid between the GVNS algorithm and the VNS algorithm. The calculation results of the IGVNS algorithm will be compared with the GVNS algorithm and the ABC algorithm. The main stages of the IGVNS and GVNS algorithms are initial solution formation, perturbation, and solution improvement. The main stages of the ABC algorithm are initialization, solution improvement and optimization. Based on manual calculations using 8 points, the ABC algorithm produces a distance of 86 km and a service time of 1.47 hours, the GVNS algorithm produces a distance of 80 km and a service time of 1.37 hours, the IGVNS algorithm produces a distance of 79 km and service time is 1.35 hours. Based on one example of the ABC algorithm, the calculation solution using the IGVNS algorithm shows more optimal results. Based on the results of parameter testing, the  parameter affects the calculation results, that is the greater the  value, the more optimal the resulting solution. While the  parameter does not affect the calculation results because it shows constant results in two successive iterations carried out.
APLIKASI ROF TOTAL VARIATION MENGGUNAKAN SPLIT BREGMAN UNTUK MENGURANGI NOISE PADA GAMBAR PEMBULUH DARAH KAPILER DALAM JARI MANUSIA Mochammad Hafiizh; Vita Kusumasari; Defri Ahmad
Jurnal Kajian Matematika dan Aplikasinya (JKMA) Vol 1, No 1 (2020): July
Publisher : UNIVERSITAS NEGERI MALANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um055v1i12020p33-36

Abstract

An image might have noises that could lose important information on that image. As a consequence, we need a consistent method to reduce the noise without erasing the important information. In this paper, ROF Total Variation using Split Bregman is applied to the image to reduce the noise. We choose the monochrome image of the human capillaries on the fingertips.
Desain Antena Mikrostrip Segitiga Terpancung Tunggal LHCP Patch Stack sebagai Basic Sensor CP-SAR Muhammad Fauzan Edy Purnomo; Vita Kusumasari; Rini Nur Hasanah; Hadi Suyono
ALINIER: Journal of Artificial Intelligence & Applications Vol. 1 No. 2 (2020): ALINIER Journal of Artificial Intelligence & Applications
Publisher : Program Studi Teknik Elektro S1 ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (826.545 KB) | DOI: 10.36040/alinier.v1i2.3163

Abstract

The development of SAR radar technology (Synthetic Aperture Radar) and aircraft as the carrier media is relatively fast and demands the need for communication facilities and infrastructure that have a variety of platforms and high-quality imaging, which can produce processed data with high resolution and good images for all type explored terrain. Based on the demands of the progress of civilization, the antenna placed on the carrier media should have simple, compact, thin, and conformal characteristics. This research will analyze and study the need for a single, low power microstrip antenna in the L-band (1.25 GHz - 1.27 GHz) for CP (Circularly Polarized)-SAR radar applications. The use of Method of Moments (MoM) show that the result of characteristic performance and S-parameter for the single triangular truncated patch stack Left-Handed Circular Polarization (LHCP) antenna, f = 1.25 GHz, are consecutively 7.23 dBic of gain, 0.51 of axial ratio, -16.35 dB of S-parameter. Moreover, the 3-dB axial ratio bandwidth LHCP antenna is around 15 MHz or the percentage around 1.2% Perkembangan teknologi radar SAR (Synthetic Aperture Radar) dan pesawat terbang sebagai media pembawanya relatif cepat dan menuntut kebutuhan sarana dan prasarana komunikasi yang memiliki ragam platform dan pencitraan yang berkualitas tinggi, yang mampu menghasilkan data olahan dengan resolusi tinggi dan gambar yang baik untuk segala jenis medan yang dijelajahi. Berdasarkan tuntutan kemajuan peradaban zaman, maka antena yang diletakan pada media pembawa tersebut, seyogyanya memiliki karakteristik sederhana, compact, tipis, dan conformal. Dalam makalah ini akan dianalisis dan dikaji kebutuhan antena mikrostrip tunggal berdaya rendah pada pita L (1,25 GHz - 1,27 GHz) untuk aplikasi radar CP (Circularly Polarized)-SAR. Penggunaan Method of Moments (MoM) menunjukkan bahwa hasil performansi karakteristik dan S-parameter untuk antena segitiga terpancung tunggal Left-Handed Circular Polarization (LHCP) patch stack, f = 1.25 GHz, berturut-turut yaitu gain sebesar 7.23 dBic, axial ratio sebesar 0.51, dan S-parameter sebesar -16.35 dB. Selain itu, bandwidth axial ratio 3-dB antena LHCP sekitar 15 MHz atau persentasinya sebesar 1,2%.
Design Antena Mikrostrip Segitiga Terpancung Tunggal LHCP Patch Stack Sebagai Basic Sensor CP-SAR Muhammad Fauzan Edy Purnomo; Vita Kusumasari; Rini Nur Hasanah; Hadi Suyono
SinarFe7 Vol. 3 No. 1 (2020): Sinarfe7-3 2020
Publisher : FORTEI Regional VII Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (337.466 KB)

Abstract

Perkembangan teknologi radar SAR (Synthetic Aperture Radar) dan pesawat terbang sebagai media pembawanya relatif cepat dan menuntut kebutuhan sarana dan prasarana komunikasi yang memiliki ragam platform dan pencitraan yang berkualitas tinggi, yang mampu menghasilkan data olahan dengan resolusi tinggi dan image yang baik untuk segala jenis medan yang dijelajahi. Sehingga, berdasarkan tuntutan kemajuan peradaban zaman, maka antena yang diletakan pada media pembawa tersebut, seyogyanya memiliki karakteristik sederhana, compact, tipis, dan conformal. Dalam makalah ini akan dianalisis dan dikaji kebutuhan antena mikrostrip tunggal berdaya rendah pada pita L (1,25 GHz – 1,27 GHz) untuk aplikasi radar CP (Circularly Polarized)-SAR. Untuk sementara menggunakan Method of Moments (MoM) bahwa hasil performansi karakteristik dan S-parameter untuk antena segitiga terpancung tunggal Left-Handed Circular Polarization (LHCP) patch stack, f = 1.25 GHz, menunjukkan berturut-turut gain sebesar 7.23 dBic, axial ratio sebesar 0.51, dan S-parameter sebesar -16.35 dB. Selain itu, bandwidth axial ratio 3-dB antena LHCP sekitar 15 MHz atau persentasinya sebesar 1,2%
Co-Authors Akio Kitagawa Asmianto Asmianto Azizurrahman Rafli Defri Ahmad Desi Rahmadani Dwi Fadila Kurniawan Dwi Roudhotillah Edi Supriana Hadi Suyono Hadi Suyono Hanik Hanik Imam Supeno Kridha Pusawidjayanti Kridha Pusawidjayanti Lathiful Anwar Latifah Mustofa Lestyanto Makbul Muksar Mayta Budiarti Melati Khoirunnisya Mochammad Hafiizh Muhammad Fauzan Edy Purnomo Muhammad Fauzan Edy Purnomo Nurul Faridhatul Aini Rahmadwati, n/a Rakhmad Romadhoni Rini Nur Hasanah Rini Nur Hasanah Rudy Yuwono Rusmi Ambarwati Sigit Kusmaryanto Tjang Daniel Chandra Yuyu Wahyu