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All Journal Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Journal of Applied Information, Communication and Technology (JAICT) Jurnal Akademik Pengabdian Masyarakat
Eni Dwi Wardihani
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Computer Science & IT Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Social Sciences

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Analisa Kinerja Sistem Deteksi Terdistribusi Pada Jaringan Sensor Nirkabel Eni Dwi Wardihani; Wirawan Wirawan
Seminar Nasional Aplikasi Teknologi Informasi (SNATI) 2008
Publisher : Jurusan Teknik Informatika, Fakultas Teknologi Industri, Universitas Islam Indonesia

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Abstract

Pada sistem deteksi terdistribusi jaringan sensor nirkabel, sejumlah sensor disebar dalam suatu daerahtertentu untuk mendeteksi suatu target. Sensor mengumpulkan data dan membuat keputusan sementaraberdasarkan data yang diperoleh. Keputusan sementara dari sensor dikirimkan ke pusat pengolahan data yangdisebut fusion center. Fusion center membuat keputusan final hipotesa yang mendekati benar berdasarkan datayang dikirimkan sensor. Kinerja dari system dapat dilihat dari parameter yang dinamakan probabilitas deteksisystem dan probabilitas false alarm. Disini akan dievaluasi parameter-parameter tersebut untuk berbagai macamkondisi jaringan sensor nirkabel.Kata kunci : deteksi terdistribusi , jaringan sensor nirkabel, fusion center, probabilitas deteksi, probabilitasfalse alarm
Design And Development Of Presence System System Using Rfid Based On Raspberry Pi Eni Dwi Wardihani
JAICT Vol 2, No 1 (2017)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (623.775 KB) | DOI: 10.32497/jaict.v2i1.1296

Abstract

Presence of students of the Master of Telecommunications Engineering Study Program majoring in Electrical Engineering Semarang State Polytechnic is currently still managed and carried out manually. This does not rule out the possibility of errors in managing data attendance and cheating students in faking their presence, and also with the development of science and technology that is currently completely automated. From this background, it was made the Presence Using RFID Based Raspberry Pi System where the PBM became Admin to be able to access all the attendance data of the S2 Telecommunications Engineering students. Student attendance recording is done by PBM by opening a MySQL database that has been created and stored, then processed and adjusted to existing student data as student ID. The end result obtained is a tool and system that are integrated automatically and also precisely, so that students are required to arrive on time so that they do not get the Compensation if they have passed the deadline and PBM admin can manage the recapitulation data through the website including student data, data lecturer, course data, room data, lecture schedule, attendance activities, and print reports in PDF format. The trial was carried out in the Computer Lab of the Semarang State Polytechnic Applied Science Master. The conclusion is that this tool and system is able to educate students to come and have a scheduled presence and can also record attendance automatically.
Performance of MiMo-OFDM Systems in Rayleigh Channel Eni Dwi Wardihani
JAICT Vol 4, No 1 (2019)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1292.544 KB) | DOI: 10.32497/jaict.v4i1.1318

Abstract

Along with the development of wireless communication makes the increasing demand for obtaining quality services and better range, bandwidth-efficient and reliable system. OFDM is a multicarrier transmission technique to overcome multipath fading, which may result in intersymbol interference (ISI). On the other hand there is the antenna system with the use of multiple antennas at the transmitter and receiver that can also be overcome multipath fading,ie Multiple Input Multiple Output (MIMO) to increase channel capacity and diversity gain. MIMO techniques used in this Final adaldah Space Time Block Code. Simulation aims to simulate and analyze the MIMO OFDM technique using space-time block code against the influence of the number of subcarriers and influence user speed in AWGN channel and Rayleigh. The simulation results based on the number of subcarriers in AWGN channel, the best performance is obtained by subcarrier number 256. With BPSK and QPSK modulation obtained BER = 6 10-4 when SNR 4 dB. Simulation based on Rayleigh channel obtained when BER = 9.7 10-5 with BPSK modulation. Based on the comparison of the greater frequency doppler given doppler frequency, resulting in BER generated even greater, because the state of the canal will be getting worse.
DESIGN AND IMPLEMENTATION OF AN X DOUBLE BAZOOKA ANTENNA IN A HYBRID COMMUNICATION SYSTEM Agik Septhiani; Hesty Fitriana; Budi Basuki Subagio; Tahan Prahara; Eko Supriyanto; Eni Dwi Wardihani; Agus Rochadi; Muhlasah Novitasari Mara
JAICT Vol. 11 No. 02 (2025): JAICT
Publisher : Politeknik Negeri Semarang

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Abstract

The double bazooka antenna is an antenna developed for military applications and later adapted by amateur radio enthusiasts for high-frequency (HF) communication. The double bazooka antenna consists of two elements: the main element, which functions as the transmitter element that transmits and receives radio frequency (RF) signals, and the auxiliary element, which serves to widen the bandwidth. The main element is the most significant factor influencing the antenna’s parameter characteristics. This study aims to realize a double bazooka antenna with a semi-directional radiation pattern at an operating frequency of 433 MHz, which will be applied as an external antenna in a hybrid communication system. The antenna material used in this study is RG-8 cable with a relative permittivity (εᵣ) of 2.3. Antenna parameter testing was conducted at the Telecommunication Engineering Laboratory of the State Polytechnic of Semarang using a Spectrum Analyzer, Vector Network Analyzer, Radio Frequency Generator, and Antenna Trainer Kit. The results of the double bazooka antenna parameter testing showed a return loss value of -23,345537 5 and a VSWR of 1:1.24 at a frequency of 433 MHz, which is in accordance with standards, and has a gain of 19.55 dBi with a semi-directional radiation pattern and vertical elliptical polarization. The double bazooka antenna was successfully implemented in a hybrid communication system, with test results showing that the antenna operates optimally. Keywords: double bazooka antenna, radio communication, hybrid communication system, handy talkie
Pendampingan Penerapan Payment Gateway pada Sistem Penerimaan Peserta Didik Baru (PPDB) Berbasis Web di Yayasan Nurul Ulum Pungkuran Semarang Dewi Anggraeni; Yusnan Badruzzaman; Ari Sriyanto; Amin Suharjono; Arif Nursyahid; Budi Basuki Subagio; Catur Budi Waluyo; Eko Supriyanto; Eni Dwi Wardihani; Helmy Helmy; Siti Femila; Aulia Tanaya; Salwa Zahra Aulia
JURNAL AKADEMIK PENGABDIAN MASYARAKAT Vol. 4 No. 3 (2026): Mei
Publisher : CV. KAMPUS AKADEMIK PUBLISING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61722/japm.v4i3.9821

Abstract

Proses Penerimaan Peserta Didik Baru (PPDB) di banyak sekolah pendanaan yayasan pendidikan masih dilakukan secara manual. Kondisi tersebut juga ditemukan di Yayasan Nurul Ulum Pungkuran Semarang, yang menaungi SD Nurul Ulum Pungkuran dan SMP Hasanuddin 3. Permasalahan utama meliputi proses administrasi yang lambat, potensi duplikasi data, kesulitan dalam verifikasi pembayaran, serta tidak adanya sistem berbasis web yang dapat diakses secara real time. Kegiatan pengabdian masyarakat ini bertujuan merancang dan menerapkan sistem PPDB berbasis web yang terintegrasi dengan payment gateway Midtrans, serta melakukan pendampingan kepada tenaga administrasi agar mampu mengoperasikan sistem secara mandiri. Metode pelaksanaannya meliputi analisis kebutuhan, perancangan sistem, pengembangan sistem PPDB, uji coba, pendampingan, dan evaluasi. Hasil kegiatan menunjukkan bahwa sistem berjalan secara efektif, mempermudah proses pendaftaran, mempercepat verifikasi pembayaran, dan meningkatkan efisiensi administrasi. Evaluasi melalui Focus Group Discussion (FGD) menunjukkan bahwa sistem memenuhi kebutuhan mitra, mudah digunakan, dan sangat membantu dalam monitoring pembayaran secara real time. Kata kunci: PPDB Online, Payment Gateway, Sistem Informasi, Pengabdian Kepada Masyarakat, Midtrans Abstrak Proses penerimaan siswa baru (PPDB) di banyak sekolah di bawah yayasan pendidikan masih dilakukan secara manual. Kondisi ini juga ditemukan di Yayasan Nurul Ulum Pungkuran di Semarang, permasalahannya meliputi proses administrasi yang lambat, potensi duplikasi data, kesulitan dalam verifikasi pembayaran, dan tidak adanya sistem berbasis web yang dapat diakses secara real time. Kegiatan pengabdian masyarakat ini bertujuan untuk merancang dan mengimplementasikan sistem PPDB berbasis web yang terintegrasi dengan gerbang pembayaran Midtrans, serta memberikan bantuan kepada staf administrasi agar mereka dapat mengoperasikan sistem tersebut secara mandiri. Metode penerapannya meliputi analisis kebutuhan, desain sistem, pengembangan sistem PPDB, pengujian, pendampingan, dan evaluasi. Hasil penelitian menunjukkan bahwa sistem berfungsi secara efektif, mengaktifkan proses pendaftaran, mempercepat verifikasi pembayaran, dan meningkatkan efisiensi administrasi. Evaluasi melalui Diskusi Kelompok Terfokus (FGD) menunjukkan bahwa sistem memenuhi kebutuhan mitra, mudah digunakan, dan bermanfaat untuk pemantauan pembayaran secara real-time. Kata kunci: Pendaftaran Mahasiswa Online (PPDB Online), Gerbang Pembayaran, Sistem Informasi, Pelayanan Masyarakat, Midtrans
Co-Authors Agik Septhiani Agus Rochadi Amin Suharjono Ari Sriyanto Arif Nursyahid Aulia Tanaya Budi Basuki Subagio Catur Budi Waluyo Dewi Anggraeni Eko Supriyanto Helmy Helmy Hesty Fitriana Muhlasah Novitasari Mara Salwa Zahra Aulia Siti Femila Tahan Prahara Wirawan Wirawan Yusnan Badruzzaman