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Perhitungan Pathloss Teknologi 4G Ulfah, Maria; Jamal, Nurwahidah
JTT (Jurnal Teknologi Terpadu) Vol 4, No 2 (2016): JTT ( Jurnal Teknologi Terpadu )
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v4i2.142

Abstract

Propagasi gelombang melalui media transmisi udara sangatlah berperan penting bagi kelancaran komunikasi seluler, karena sinyal yang disalurkan oleh media transmisi udara yang akan diterima oleh penerima dipengaruhi oleh kontur bumi, media pantulan, penghalang (obstacle) serta jarak dan kemungkinan-kemungkinan yang tidak dapat diprediksi kemunculannya dan menghambat proses transmisi sinyal yang berlangsung.Penting dalam memperhitungkan rugi-rugi (pathloss) sinyal yang terjadi disepanjang saluran transmisi, karena mempengaruhi kualitas sinyal yang akan diterima. Dalam menentukan rugi-rugi sinyal digunakan model propagasi COST 231 karena sesuai dengan frekuensi 4G LTE yaitu 1800 MHz. Dalam penelitian ini dihitung rugi-rugi (pathloss) sinyal 4G LTE dengan variasi jarak antenna pemancar (E node B)  terhadap penerima (mobile station) yaitu 1 km, 5 km, 10 km, 15 km, 20 km, dengan ketinggian antenna pemancar 24  meter. Dari hasil perhitungan didapatkan semakin jauh jarak antara antena pemancar terhadap penerima maka nilai pathloss semakin besar yaitu dari 138.8853 dB menjadi 175.4915 dB  
Perencanaan Kebutuhan Base Station Jaringan Fixed WiMAX Berdasarkan Demand Site Jamal, Nurwahidah
Jurnal Teknologi Terpadu Vol 3, No 1 (2015): JTT ( Jurnal Teknologi Terpadu )
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

AbstractThis research is done to know the cell range and base station needs in specific area by using fixed WiMAX technology. The planning is started with some of assumption as the initial data to do a calculation of growth and density of customer which is used to calculate the cell range and base station needs for voice services and data.         In this research, for 500.000 population in an area with 240 km2 has taken the base station needs as 148 cell for the urban area with range of each cell is 0,98 km2 and 63 cell for sub-urban area with the cell range of each cell is 1,53 km2. Keywords : Fixed WiMAX, Demand Site, Urban, Sub-urban, Base Station.   AbstrakPenelitian ini dilakukan untuk mengetahui luas sel dan kebutuhan base station pada suatu wilayah tertentu dengan menggunakan teknologi fixed WiMAX. Perencanaan diawali dengan beberapa asumsi-asumsi sebagai data awal untuk melakukan perhitungan pertumbuhan dan kepadatan pelanggan yang selanjutnya digunakan untuk menghitung luas sel dan kebutuhan base station untuk layanan voice dan data. Pada penelitian ini untuk total populasi 500.000  jiwa pada suatu  wilayah seluas 240 km2 diperoleh  kebutuhan base station sebanyak 148 sel untuk wilayah urban dengan luas masing-masing sel adalah 0,98 km2  dan 63 sel untuk wilayah sub-urban dengan luas sel masing-masing sel adalah 1,53 km2. Kata kunci : Fixed WiMAX, Demand Site, Urban, Sub-urban, Base Station. 
Desain Model dan Simulasi PLC-Mikrokontroler sebagai Modul Pembelajaran Berbasis PLC Hidayati, Qory; Rachman, Fathur Zaini; Yanti, Nur; Jamal, Nurwahidah; Suhaedi, Suhaedi
JTERA (Jurnal Teknologi Rekayasa) Vol 2, No 2: December 2017
Publisher : Politeknik Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (857.786 KB) | DOI: 10.31544/jtera.v2.i2.2017.73-82

Abstract

Programmable Logic Controller (PLC) merupakan suatu piranti yang dibuat sebagai pengganti kumpulan relai-relai mekanik yang digunakan dalam sistem kontrol. PLC berkerja dengan cara membaca instruksi-instruksi dari masukannya. Karena PLC pada umumnya memiliki harga yang cukup mahal dan hanya beberapa orang yang dapat mempelajarinya, maka dibuatlah PLC trainer. PLC trainer dirancang menggunakan mikrokontroler Arduino Uno, modul input (berupa: toggle switch, push button, dan limit switch), dan modul output (berupa: LED, seven segment, motor DC, dan buzzer). PLC trainer juga dilengkapi prototype lampu lalu lintas sebagai modul output simulasi lampu lalu lintas empat arah. PLC trainer memanfaatkan LDmicro untuk membuat pemrograman ladder diagram dengan instruksi-instruksi sesuai dengan keinginan programmer dan menggunakan software Xloader untuk upload program ke Arduino Uno. Dari hasil pengujian diperoleh bahwa mikrokontroler Arduino Uno dapat dimanfaatkan sebagai PLC trainer untuk modul pembelajaran.
Jaringan Syaraf Tiruan Untuk Pengenalan Citra Sidik Jari Pada Smart Home Berbasis MYSQL Yanti, Nur; Rachman, Fathur Zaini; Jamal, Nurwahidah; Purwanto, Era; Fachrurozy, Fachrurozy
Jurnal Teknologi Informasi dan Ilmu Komputer Vol 5, No 5: Oktober 2018
Publisher : Fakultas Ilmu Komputer, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (652.279 KB) | DOI: 10.25126/jtiik.2018551032

Abstract

 Sistem keamanan yang bertujuan sebagai sistem monitoring pada smart home seperti memonitoring pengguna laboratorium, perpustakaan, atau ruangan penyimpanan dan peminjaman peralatan praktek di program studi suatu kampus, ruang penyimpanan senjata, hingga rumah tinggal, memerlukan sekuritas yang handal untuk memudahkan identifikasi pengguna ruangan atau pencegahan dari tindak pencurian, maka dirancang sistem monitoring melalui pengenalan citra sidik jari menggunakan sensor ZFM60, jaringan syaraf tiruan dan MySQL. Tujuannya agar di dapat pola yang relevan dari citra dan mengeliminasi informasi atau variabel yang tidak relevan. Metode yang digunakan yaitu experimental, terdiri dari pengumpulan data sidik jari, perancangan sistem pengolahan citra, pembuatan dan pengujian hardware dan software, serta implementasi sistem. Hasil proses pengenalan atau klarifikasi citra sidik jari melalui GUI Matlab, nilai error hasil pengolahan dan pelatihan citra sidik jari dengan jaringan syaraf tiruan, digunakan sebagai ciri citra dan disimpan sebagai data base pada MySQL, kemudian dibandingkan dengan nilai error citra sidik jari baru yang di klarifikasi. Nilai citra yang dapat dikenali berada diantara -0,0005 hingga 0,0005, diluar batas tersebut merupakan citra yang tidak dikenali. Selisih (nilai error) antara ciri citra yang tersimpan pada data base dan ciri citra yang diklarifikasi menghasilkan nilai error yang kecil yaitu < 0.0005, menunjukkan jaringan syaraf tiruan backpropagation handal diimplementasikan pada pengenalan sidik jari untuk melatih pola citra dari sidik jari. Konfigurasi jaringan yaitu maksimal epoch = 3000, learning rate = 1, target error = 0.1, hidden layer = 17. Pelatihan jaringan syaraf tiruan pada konfigurasi tersebut menghasilkan nilai error terkecil dari ciri citra sebesar 0.0000085. Abstract The security system that aims as a monitoring system in smart home such as monitoring laboratory users, libraries, or storage rooms and borrowing practical equipment in the study program of a campus, weapons storage room, to a residence, requires reliable securities to facilitate identification of room users or prevention from theft, it is designed a monitoring system through fingerprint image recognition using ZFM60 sensors, artificial neural networks and MySQL. The goal is to get relevant patterns from the image and eliminate irrelevant information or variables. The method used is experimental, consisting of fingerprint data collection, image processing system design, hardware and software manufacturing and testing, and system implementation. The result of the process of recognition or clarification of fingerprint images through the Matlab GUI, the error value of processing and training of fingerprint images with artificial neural networks, is used as a feature of the image and stored as a data base on MySQL, then compared with the error value of the new fingerprint image that is clarified. The recognizable image value is between -0,0005 to 0,0005, beyond this limit is an unrecognized image. The difference (error value) between the characteristics of the image stored in the data base and the clarified image feature produces a small error value of <0.0005, indicating a reliable backpropagation artificial neural network is implemented in fingerprint recognition to train the image pattern of fingerprints. Network configuration is maximum epoch = 3000, learning rate = 1, target error = 0.1, hidden layer = 17. Artificial neural network training in the configuration produces the smallest error value of the image characteristics of 0.0000085.
Pelatihan Sistem Digital dan Komunikasi Menggunakan Modul Arduino pada Sekolah Menengah Kejuruan Rachman, Fathur Zaini; Jamal, Nurwahidah; Yanti, Nur; Hidayati, Qory
ABDIMAS UNIVERSAL Vol 1 No 2 (2019): Oktober
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Balikpapan (LPPM UNIBA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (789.328 KB) | DOI: 10.36277/abdimasuniversal.v1i2.29

Abstract

The aim of the activity is to increase the competence of teachers and students by training Arduino-based practice modules in the implementation of digital and communication systems that have multi-input and multi-output devices. Partner problems are industry technology 4.0 and teacher competence. Industry 4.0 technology issues are implemented in practical training modules that are useful as learning media that can be implemented for various applications. The problem of teacher competence with training and development of learning media so as to be able to create and innovate in digital and communication systems. The method used in this activity is discussion, explanation, demonstration, exercise, and observation. The results of this activity increase the competence and knowledge of vocational schools by marked the participants are able to operate and implement modules.
Peningkatan Kompetensi Mekatronika Bagi Guru SMK Balikpapan Hidayati, Qory; Yanti, Nur; Jamal, Nurwahidah
ABDIMAS UNIVERSAL Vol 1 No 2 (2019): Oktober
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Balikpapan (LPPM UNIBA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (459.109 KB) | DOI: 10.36277/abdimasuniversal.v1i2.30

Abstract

The greater the demands to make graduates with adequate skills, qualified instructors need to be prepared, as well as possessing good skills. One of the skills that need to be possessed by vocational school teachers in the fields of electricity, electricity and automation is mechatronics. Based on needs analysis and discussion with partners, 3 (three) main problems were identified, namely: (1) Teachers still often use the lecture method, so students become passive and result in low student competency in mechatronic subjects. (2) The condition of school facilities and infrastructure is still inadequate resulting in reduced interest and motivation of students in participating in learning. (3) The use of mechatronics learning media by teachers is less than optimal resulting in students' creativity in solving problems not appearing. The survey results of this community service implementation team found that Balikpapan vocational school teachers in engineering require mechatronics skills in using the Programable Logic Controller (PLC) related to making models, designing programs and programming them according to the needs of the teaching and learning process to anticipate technological progress in the field of control . Based on the problem, a Mechatronics Competency Enhancement training for Balikpapan Vocational Students was held, regarding PLC skills. The results of the activities carried out can be drawn several conclusions, among them (1) community service activities carried out in the form of Programable Logic Controller (PLC) skills training to be able to make models, design programs and program their own PLCs according to the learning process needs, (2) This activity was carried out on July 25-27 2019 with representatives from 5 Vocational High Schools in the city of Balikpapan. Keywords: Competence, electro, mechatronics,PLC,  vocational teacher
PENGARUH POST-TREATMENT PLASMA CVD LAPISAN DIAMOND-LIKE CARBON TERHADAP SIFAT KEKERASAN PERMUKAAN BAJA AISI 410 Anhar, Wahyu; Jamal, Nurwahidah; Suprapto, Suprapto
ROTOR Vol 10 No 1 (2017)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v10i1.5150

Abstract

This study is aimed to determine the effect of post-treatment plasma CVD on diamond-like carbon films of surface hardness AISI 410 steel. Enhancement of surface hardness on AISI 410 can be done with deposition thin layer by plasma CVD, and continued by post-treatment plasma CVD. Mixture of Ar (90%) with CH4 (10%), and He (76%) with CH4 (24%) are used as thin layer material. Deposition parameter of pressure, temperature, and time that been used are 1.6 mbar, 300 °C, and 4 hours, respectively. Furthermore, post-treatment process parameter is used by Ar gas, with pressure of 1 mbar, temperature 300 °C, and variation time of 10, 20, 30 minutes. Surface hardness test is used by Vickers microhardness tester. Cross-section microstructure and chemical compositions are examined by scanning electron microscopy coupled with energy dispersive spectroscopy. Based on surface hardness test, the surface hardness on AISI 410 is increased by post-treatment process. The surface hardness from 232.3 VHN increase to 301.2 VHN is produced by post-treatment of compound Ar-CH4 in 20 minutes. Futhermore, the surface hardness from 1,035.8 VHN increase to 1,743.2 VHN is produced by post-treatment of compound He-CH4 in 30 minutes.   Keywords: Post-treatment, Surface hardness, AISI 410, Ar-CH4, He-CH4