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All Journal Jurnal Rekayasa Mesin JOIV : International Journal on Informatics Visualization Jurnal Pengabdian Kolaborasi dan Inovasi IPTEKS
Amran Yobioktabera
Fakultas Ilmu Komputer, Universitas Dian Nuswantoro, Semarang 50131
Agriculture, Biological Sciences & Forestry Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Mechanical Engineering Social Sciences

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STRATEGI PENINGKATAN PEMASARAN DAN PENJUALAN PAKET WISATA VW TOUR BOROBUDUR MELALUI PEMBUATAN WEBSITE Nur Aziz Thohari, Afandi; Raharjo, Parsumo; Hestiningsih, Idhawati; Handoko, Slamet; Karima, Aisyatul; Santoso, Kuwat; Yobioktabera, Amran
Jurnal Pengabdian Kolaborasi dan Inovasi IPTEKS Vol. 2 No. 2 (2024): April
Publisher : CV. Alina

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59407/jpki2.v2i2.621

Abstract

Volkswagen (VW) Tour Borobudur menyajikan pengalaman menarik bagi wisatawan yang berkunjung ke kota Magelang. Wisatawan dapat melihat pemandangan alam yang indah menggunakan mobil VW. Selain itu wisatawan juga dapat berkunjung ke sentra UMKM di daerah borobudur seperti UMKM rengginan, madu, dan kopi. Salah satu penyedia jasa VW Tour Borobudur adalah CV. Sinayang Group. Perusahaan yang dirintis sejak tahun 2022 ini mempromosikan jasa VW Tour melalui sosial media seperti facebook, instagram, dan tiktok. Penggunaan sosial media ini cukup efektif di awal merintis usaha, namun semakin banyaknya kompetitor membuat jumlah pesanan semakin sedikit. Oleh karena itu untuk mengoptimasi pemasaran paket wisata VW Tour Borobudur. Tim pengabdian kepada masyarakat dari Program Studi D3 Teknik Informatika Politeknik Negeri Semarang melakukan pendampingan pembuatan website untuk pemasaran jasa VW Tour Borobudur. Metode pelaksanaan kegiatan dimulai dari identifikasi kebutuhan, Perencanaan, Pengembangan Sistem, Pendampingan Operasional, dan Implementasi Teknologi. Adanya website pemasaran ini memudahkan wisatawan dalam melihat informasi dan melakukan pemasanan paket wisata VW Tour Borobudur. Website pemasaran VW Tour Borobudur sudah dapat diakses secara publik melalui alamat aavwborobudur.com. Berdasarkan hasil evaluasi pada bulan september sampai desember 2023, terjadi peningkatan jumlah pesanan paket VW Tour. Peningkatkan jumlah pesanan terjadi karena banyak faktor. Namun setelah dilakukan survey, wisatawan mengaku bahwa mereka mengetahui jasa VW Tour ini melalui website. Hal ini menunjukan bahwa adanya website dapat digunakan untuk pemasaran digital.
Smartphone-based Indoor Navigation for Guidance in Finding Location Buildings Using Measured WiFi-RSSI Triyono, Liliek; Prayitno, -; Rahaman, Mosiur; Sukamto, -; Yobioktabera, Amran
JOIV : International Journal on Informatics Visualization Vol 6, No 4 (2022)
Publisher : Society of Visual Informatics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/joiv.6.4.1528

Abstract

This study investigates a Wi-Fi-based indoor navigation system to determine building locations. The system was developed using the fingerprint method from the Received Signal Strength Indication (RSSI) of each Access Point (AP). The main components of a smartphone-based system use data from Wi-Fi and the Global Positioning System (GPS). The system developed for navigation is designed and implemented as an element of a dynamic, seamless mobility planning and building location route guidance application. Building map data is collected from Google Map data and enhanced by coloring the geographic location of buildings displayed on mobile devices. Navigational aids collected from sensors provide trip orientation and position updates. The approach of measuring the distance between known positions is compared to those displayed in the application with the haversine formula to measure the accuracy of the position displayed. A series of experiments were conducted in the Politeknik Negeri Semarang area, Indonesia. The experiment results showed that the Wi-Fi-based indoor positioning system was accurate within 7.050 meters of the error for that location, thus proving the system's usefulness for determining the location of buildings in the campus area. The measurement has not adopted the maximum APs placement for signal coverage and strength, only using the existing APs positions. The temperature nor humidity was neither measured in each area where the AP was installed, which is discussed later. This system can help visitors without asking, even though they have only visited once.
Two-Degree-of-Freedom Flow-Induced Vibrations of an Elastically-Mounted Cylinder under Oscillatory Flow: A Numerical Study Riadini, Elfrida Rizky; An-Nizhami, Avicenna; Yanuar, Padang; Yobioktabera, Amran; Lathief, Muttabik Fathul
Jurnal Rekayasa Mesin Vol. 20 No. 3 (2025): Volume 20, Nomor 3, Desember 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i3.7102

Abstract

Flow-Induced Vibration (FIV) in oscillatory flow represents a complex fluid–structure interaction that remains insufficiently explored, particularly for two-degree-of-freedom (2-DoF) systems allowing coupled inline and cross-flow motion. Previous studies have primarily focused on steady flows or limited parameter ranges, leaving a significant knowledge gap in understanding dynamic responses influenced by both reduced velocity ( ) and Keulegan–Carpenter (KC) numbers. This study aims to numerically investigate the vibration characteristics of a 2-DoF circular cylinder subjected to oscillatory flow, emphasizing the coupling mechanism between the two motion directions under varying  and KC values. The research employed a numerical approach based on the Direct Forcing Immersed Boundary (DFIB) method integrated with Navier–Stokes solvers and structural motion equations. Simulations were conducted for KC values of 5–20 and  ranges between 5–35. The temporal integration was performed using the third-order Adams–Bashforth schemes to ensure accuracy and stability. The results reveal that lock-in phenomena occur within specific UR ranges for each KC value, with resonance peaks identified at  = 5 for KC = 5,  = 10 for KC = 10,  = 15 for KC = 15, and  = 20 for KC = 20. Increasing KC values amplify the interaction between flow and structural responses, producing multi-mode vibrations and nonlinear coupling between inline and transverse motions. Furthermore, galloping phenomena were detected at higher UR, indicating a transition from vortex-induced vibration to hydrodynamic instability. These findings contribute to a deeper understanding of FIV dynamics in oscillatory environments, offering insights for optimizing offshore structure design and wave energy harvesting devices.
Co-Authors - Prayitno, - - Sukamto, - Afandi Nur Aziz Thohari Aisyatul Karima An Nizhami, Avicenna Elfrida Rizky Riadini Idhawati Hestiningsih Lathief, Muttabik Fathul Padang Yanuar Parsumo Raharjo, Parsumo Rahaman, Mosiur Santoso, Kuwat Slamet Handoko Triyono, Liliek