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The Design of Capacitive Slit on Improving the Antenna Gain of Binomial Double Strip Hexacula Omnidirectional Broadband Antenna Syahrial Syahrial; Safwan Safwan; Rizal Munadi; Roslidar Roslidar
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 16, No 5: October 2018
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v16i5.8669

Abstract

The capacitive slit is a method of making the impedance value to be resistive. To achieve this goal is a challenge in addition to the slit antenna and gives impact to gain as one of the important parameters in antenna design. The antenna gain in a particular direction is defined as 4π times the ratio of radiation intensity in that direction to the power received by the transmitter antenna. In this research, the proposed capacitive slit method was tested on the hexacula omnidirectional broadband antenna operating on frequency 0.85-3 GHz and gain 4.8 dBi. The testing was conducted to obtain the gain improvement of the hexacula omnidirectional broadband antenna. The placement of the capacitive slit was implemented on double strip antenna with 4 times experiments. The best experiment result was obtained when three capacitive slits were placed on different strips. The capacitive slit was designed by analyzing the average value of input impedance before calculating the dimension of the capacitive slit that applied to the antenna. The experiment result shows that the best value of antenna gain is 7.19 dBi. The gain increment is linear to the number of capacitive slits applied to the antenna.
Implementasi Metode Simple Additive Weighting Pada Penentuan Peringkat Kerentanan Website (Studi Kasus Website Universitas Negeri Aceh) Mukhroji Mukroji; Rizal Munadi; Syahrial Syahrial
Informatika Mulawarman : Jurnal Ilmiah Ilmu Komputer Vol 14, No 1 (2019): Informatika Mulawarman : Jurnal Ilmiah Ilmu Komputer
Publisher : Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (584.53 KB) | DOI: 10.30872/jim.v14i1.1431

Abstract

Dewasa ini, penggunaan website sebagai media informasi merupakan suatu hal lazim yang dilakukan oleh berbagai institusi atau organisasi. Informasi yang disajikan sangat bervariatif, dari hanya informasi sederhana hingga informasi yang sensitif yang memerlukan penanganan keamanan yang baik. Terjadinya tindakan penyusupan atau penyalahgunaan terhadap suatu website dapat dilakukan oleh pihak tertentu dengan berbagai motif jika tindakan pengamanan tidak diimplementasikan. Akibatnya, kerentanan website dapat mengganggu informasi yang diakses oleh masyarakat. Oleh karena itu, dalam penelitian ini kerentanan website menjadi fokus yang dikaji dan pengujian kerentanan dilakukan dengan software Open Web Application Security Project (OWASP). Kemudian, hasil dari pengujian dengan OWASP akan diimplementasikan dengan menggunakan metode Simple Additive Weighting (SAW). Penerapan metode SAW ini akan menghasilkan pengurutan nilai kerentanan dari setiap website yang diuji dan dapat menjadi gambaran kualitas keamanan website Universitas Negeri di Provinsi Aceh. Berdasarkan hasil pengujian diperoleh tingkat kerentanan tertinggi terjadi pada universitas yang tidak menggunakan CMS sebagai aplikasi pada website yang dibangun.
Perancangan Augmented Reality dengan Metode Marker Card Detection dalam Pengenalan Karakter Korea Nurrisma Nurrisma; Rizal Munadi; Syahrial Syahrial; Ernita Dewi Meutia
Informatika Mulawarman : Jurnal Ilmiah Ilmu Komputer Vol 16, No 1 (2021): Informatika Mulawarman : Jurnal Ilmiah Ilmu Komputer
Publisher : Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jim.v16i1.5152

Abstract

Augmented Reality (AR) merupakan teknologi yang menggabungkan objek nyata dan objek virtual dalam dua dimensi (2D) atau tiga dimensi (3D) secara real time. Pengembangan aplikasi AR telah banyak dilakukan pada berbagai bidang, termasuk bidang pendidikan yaitu pada pembelajaran bahasa asing. Penelitian ini bertujuan untuk membangun aplikasi pengenalan karakter huruf Korea yang berjumlah 24 huruf pada sistem operasi Android. Aplikasi ini dibangun menggunakan Unity 3D, Vuforia dengan algoritme FAST corner detection dan objek 3D yang dibuat menggunakan Blender 3D. Aplikasi ini memanfaatkan metode marker based tracking terhadap marker yang dirancang, yaitu marker card detection. Marker ini digunakan untuk menentukan titik munculnya objek 3D. Berdasarkan hasil pengujian, marker yang dirancang mampu menangkap objek 3D pada jarak 270 cm. Pengujian pengenalan karakter Korea terhadap 30 pengguna menunjukkan peningkatan sebesar 70% dalam memahami karakter Korea. Hasil pengukuran respon terhadap aplikasi dengan menggunakan skala Likert, diperoleh skor 82,6% dengan kriteria sangat baik. Penelitian ini berhasil membuktikan bahwa AR dapat digunakan sebagai media alternatif untuk pembelajaran bahasa asing, khususnya pengenalan karakter Korea.
Analisis TCP Cubic dan Simulasi untuk Menentukan Parameter Congestion Window dan Throughput Optimal pada Jaringan Nirkabel Ad Hoc Ary Firnanda; Teuku Yuliar Arif; Syahrial Syahrial
Jurnal Rekayasa Elektrika Vol 13, No 2 (2017)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1.311 KB) | DOI: 10.17529/jre.v13i2.4874

Abstract

Ad hoc wireless network performance often declines caused the onset of congestion on the process of sending data. TCP Congestion Control used to solve these problems. TCP Cubic is one variant TCP Congestion Control. This research was conducted with the test and compare between variable value b=0.2 with the value of the variable b to be used in ad hoc wireless networks. This research was conducted with the experimental method using network simulation software NS-3. The results showed that the value of variable b is the right on ad hoc wireless network with packet loss by 5% to generate optimal congestion window max is b=0.5 and the average throughput optimal is b=0.1
Penerapan Metode Naïve Bayes pada Honeypot Dionaea dalam Mendeteksi Serangan Port Scanning DESI KURNIA NURILAHI; RIZAL MUNADI; SYAHRIAL SYAHRIAL; AL BAHRI
Jurnal Elkomika Vol 10, No 2 (2022): ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektr
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v10i2.309

Abstract

ABSTRAKPeningkatan serangan terhadap jaringan komputer terus terjadi setiap tahunnya dan dampaknya membuat layanan menjadi terganggu. Pada Penelitian ini Dionaea Honeypot yang merupakan jenis Low Interaction Honeypot, diterapkan untuk mengevaluasi serangan yang terjadi berdasarkan teknik serangan Port Scanning. Data Log yang diperoleh dari pengujian, dianalisis dengan metode Naïve Bayes. Lebih lanjut, data pemetaan Port Scanning dengan menggunakan perangkat lunak Nmap, ditemukan port yang terbuka sebanyak 359 data. Hasil uji klasifikasi dengan menggunakan perangkat lunak WEKA dan penerapan metode Naïve Bayes. Hasil uji klasifikasi diperoleh nilai akurasi sebesar 86,2% dengan nilai rata-rata Precision sebesar 0,885%, Recall sebesar 0,862% dan F-measure sebesar 0,849%. Hasil ini menunjukkan penerapan metode Naïve Bayes berhasil mengklasifikasikan potensi serangan yang dilakukan berdasarkan teknik Port Scanning.Kata kunci: Jaringan Komputer, Low Interaction Honeypot, Port Scanning, Uji Klasifikasi, Akurasi ABSTRACTIncreasing attacks on computer networks continue to occur every year, and the impact makes services disrupted. In this study, Dionaea Honeypot, a type of Low Interaction Honeypot, is applied to evaluate attacks based on the Port Scanning attack technique. Log data obtained from the test were analyzed using the Naïve Bayes method. Furthermore, Port Scanning mapping data using Nmap software on the network found 359 open ports data. The results of the classification test using WEKA software and the application of the Naïve Bayes method. The classification test results obtained are accuracy value, 86.2% with an average value of 0.885% Precision, 0.862% Recall and 0.849% F-measure. This result shows that the application of the Naïve Bayes method has succeeded in classifying potential attacks based on the Port Scanning technique.Keywords: Computer Network, Low Interaction Honeypot, Port Scanning, Classification Test, Accuracy
Penerapan Multiple Attribute Decision Making dengan Metode Simple Additive Weighting untuk Pemeringkatan Kerentanan Keamanan Website RIZAL MUNADI; MUKHROJI MUKHROJI; SYAHRIAL SYAHRIAL; ERNITA DEWI MEUTIA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 6, No 2 (2018): ELKOMIKA
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v6i2.194

Abstract

ABSTRAKPada universitas, website dibangun sebagai jendela informasi elektronik yang menyediakan informasi tentang pendidikan tinggi. Namun, adanya celah keamanan pada website berpotensi untuk dieksploitasi bagi kriminal teknologi informasi. Berdasarkan masalah ini, fokus penelitian ini ditekankan pada aspek keamanan. Dalam penelitian ini, perangkat lunak OWASP digunakan sebagai alat uji. Kemudian, evaluasi dan analisis dilakukan terhadap kerentanan website terhadap serangan. Akhirnya, dengan menggunakan teknik Multiple Attribute Decision Making dengan metode Simple Additive Weighting dilakukan proses pemeringkatan kerentanan terhadap lima website universitas negeri di Provinsi Aceh. Hasil pengujian menunjukkan bahwa potensi kerentanan yang paling tinggi terjadi pada Universitas-2 dengan nilai rata-rata kerentanan, 1,72. Kerentanan ini menunjukkan adanya celah keamanan ini yang harus segera diperbaiki segera agar informasi yang tersedia menjadi akurat.Kata kunci: Website, OWASP, MADM, SAW, KerentananABSTRACTAt the university, the website is built as a window of electronic information that provides information about higher education. However, the existence of security holes on the website has the potential to be exploited for criminal information technology. Based on this issue, the focus of this research is emphasized on the security aspect. In this study, OWASP software is used as a test tool. Then, the evaluation and analysis carried out against the vulnerability of the website against the attack. Finally, using the Multiple Attribute Decision Making technique using the Simple Additive Weighting method, vulnerability rating was made to five public university websites in Aceh Province. The test results show that the highest vulnerability potential occurs at University-2 with an average vulnerability score of 1.72. This vulnerability indicates a security hole that needs to be fixed immediatelyso that the information available becomes accurate. Keywords: Website, OWASP, MADM, SAW, Vulnerability
Evaluasi Pengaruh Parameter TIM Berdasarkan Multirate Terhadap Konsumsi Energi Jaringan IEEE 802.11ah Daifi Afrila Riefi; Teuku Yuliar Arif; Syahrial
Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Vol 5 No 4 (2021): Agustus 2021
Publisher : Ikatan Ahli Informatika Indonesia (IAII)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (569.73 KB) | DOI: 10.29207/resti.v5i4.3224

Abstract

WLAN IEEE 802.11ah is wireless standard technology which potentially used for IoT networking to provide longer range transmission than WPAN and LPWAN. MAC layer IEEE 802.11ah introduces TIM segmentation scheme that provides effective management toward STA in large amount to make the energy consumption efficiently. STA is organized in hierarchical structure that allows TIM segmentation to reduce the length of frame beacon contains TIM. In case there’s no segmentation in a network with many STA, the TIM would be longer and requires all STA to wake-up receiving beacon TIM including STA without downlink data. This research intends to evaluate and analyze the TIM optimal parameters. Those are Page Period, Page Slice Length and Page Slice Count toward IEEE 802.11ah energy efficiency based on multirate using simulator NS-3 implemented on IEEE 802.11ah. As the result of STA experiment shows that Non-TIM is only optimal on sleep duration while TIM is optimal on energy consumption and delay packet. In the experiment of impact of STA/Slot amount based on Page Slice Length shows that sleep duration and energy consumption is optimal depends on the amount of the STA/Slot and data rate used while the optimal packet delay varies for each Page Slice Length.
RANCANG BANGUN ANTENA BROADBAND ENAM CABANG SALURAN DENGAN METODE BINOMIAL CELAH KAPASITIF TUNGGAL Safwan; Syahrial; Rizal Munadi
J-Innovation Vol. 5 No. 1 (2016): Jurnal J-Innovation
Publisher : Politeknik Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (775.029 KB) | DOI: 10.55600/jipa.v5i1.27

Abstract

In general, only one antenna is used for one application. To streamline the use of an antenna, a broadband antenna can be utilized for various applications. One broadband antenna suitable for various applications are broadband antennas six branches of the plate with a single capacitive gap binomial method. This antenna works in the frequency range 0.81 GHz - 3 GHz, which has a bandwidth of 2.19 GHz with a VSWR ≤ 1.5. This antenna has a dielectric antenna different. Dielectric antenna using materials from household waste such as plastic, paper, stereofoam, and others. It became one of the benefits is because the antenna is able to utilize waste materials for the application of technology. This antenna is relatively large dimensions so that the antenna is suitable for use in the transmission system and not be used as a suitable handset. Applications that can use this antenna including GSM 1900, Wifi 2.4 GHz, amateur radio, and more. This antenna uses a binomial method and a single capacitive gap as a method of widening the bandwidth. Binomial method is used to make the antenna impedance into tiers binomial pointless to shrink the transition effect antenna impedance of each level. slit method serves as a single capacitive impedance value improvements that will affect to the bandwidth of the antenna.