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All Journal Jurnal Fisika Unand Jurnal Otomasi Kontrol dan Instrumentasi Jurnal Hilirisasi IPTEKS (JHI) Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks
Harmadi Harmadi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Dentistry Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics Public Health Social Sciences Veterinary Other

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SOSIALISASI DAN PEMETAAN POTENSI TANAH LONGSOR MENGGUNAKAN METODE MIKROSEISMIK DAN GEOLISTRIK DI KAWASAN OBJEK WISATA BUKIT NOBITA Marzuki Marzuki; Mutya Vonnisa; Ahmad Fauzi Pohan; Arif Budiman; Imam Taufiq; Trengginas Eka Putra Sutantyo; Elistia Liza Namigo; Dian Milvita; Alimin Mahyudin; Nini Firmawati; Muldarisnur Muldarisnur; Afdal Afdal; Dahyunir Dahlan; M. Ali Shafii; Afdhal Muttaqin; Rico Adrial; Dedi Mardiansyah; Harmadi Harmadi; Zulfi Zulfi; Geby Sri Ayu Oktavia; Fani Anjelina; Nurul Annisa
Jurnal Hilirisasi IPTEKS Vol 6 No 2 (2023)
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jhi.v6i2.655

Abstract

Nobita Hill is one of the areas being developed as a tourist attraction in the city of Padang. Above Nobita Hill is a beautiful view, and you can see the picture of Padang City. However, the hilly topography with steep slopes makes this area prone to landslides. This activity aims to map the potential for landslides on Novita Hill. Activities start from preparation, implementation in the field, and evaluation. Field activities are carried out in two stages. The first stage is an experiment to map the landslide potential. The second stage is socialization. The target audience for this activity is the Village Head of Jua Nan XX Village and its officials and the community around Nobita Hill. The results of the study and mapping were disseminated to the village administration and community leaders involved in the development of the Bukit Nobita tourism area, which was carried out on November 16, 2022. The result of tourist objects often changes land use and cover. However, mitigation of the potential for landslides in this area has never been done. Therefore, the Andalas University Physics Department team mapped the potential for landslides on Novita Hill for six months, using microseismic and geoelectric methods. This activity obtained a map of the distribution of dominant frequencies, a map of the distribution of amplification, and an identification of slip planes concerning the potential for landslides on Nobita Hill. Furthermore, the results of the mapping and mitigation efforts have been disseminated to the village administration and community leaders involved in the development of the Bukit Nobita tourism area. This activity was carried out well. The landslide potential distribution map obtained from this activity is input for the community and stakeholders in developing the Buki Nobita tourist attraction that is safe from disasters.
Education of Disaster Awareness through Disaster Readiness Socialization as an Effort to Increase Community Knowledge around the Nobita Hill Tourism Area on Disaster Mitigation Marzuki Marzuki; Mutya Vonnisa; Harmadi Harmadi; Dwi Pujiastuti; Arif Budiman; Dwi Puryanti; Sri Oktamuliani; Imam Taufiq; Meqorry Yusfi; Rahmat Rasyid; Astuti Astuti; Sri Handani; Sri Rahayu Alfitri Usna; Dian Fitriyani; Elvaswer Elvaswer; Muhammad Arif; Muhammad Kahfi; Naela Amalia Zulfa; Iqbal Ramadhan; Nurul Hasanah; Feriska Handayani Irka
Warta Pengabdian Andalas Vol 31 No 2 (2024)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.31.2.353-361.2024

Abstract

Nobita Hill, a tourist site in Padang City, is undergoing development as a tourist destination that offers a bird's-eye view of Padang City. Unfortunately, the hilly topography with steep slopes increases the risk of landslides in this area. In order to address the problem, the community service team from the Physics Department of Andalas University has carried out a six-month community service program from July to December 2022. It focused on disaster awareness education and used a qualitative approach. This activity aims to socialize disaster mitigation efforts, especially those related to landslides and earthquakes, considering that Padang City is also prone to earthquakes. The results of this activity showed an increase in the knowledge of the local community after the socialization, but repeated activities are needed to achieve optimal results. This ongoing activity is essential to ensure continuous improvement in the community's understanding of disaster mitigation and to support efforts to make Bukit Nobita a disaster-resilient area. Thus, this activity makes a positive contribution to shaping a safe, sustainable, and disaster-resilient tourism environment.
Rancang Bangun Alat Ukur Frekuensi Pernapasan Manusia Berbasis Sensor Serat Optik Lukita Sari Ikhsan; Harmadi Harmadi
Jurnal Fisika Unand Vol 8 No 4 (2019)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.8.4.301-307.2019

Abstract

Telah dirancang bangun alat ukur frekuensi pernapasan manusia berbasis sensor serat optik dengan metode ekstrinsik. Alat ukur frekuensi pernapasan tersebut terdiri dari laser dioda sebagai sumber cahaya, serat optik FD-620-10 step index multimode sebagai pandu gelombang, dan fotodioda OPT101 sebagai fotodetektor. Arduino UNO R3 digunakan sebagai pengolah data, hasil pengukuran ditampilkan melalui LCD I2C 16x2 karakter dan membran uji berupa membran mikrofon, membran polimer karet yang terbuat dari bahanlateks dan membran polimer dari glukosa (C6H12O6). Pernapasan padamanusia menjadi sumber getaran pada membran. Membran yang bergetar merubah intensitas cahaya yang berasal dari laser dioda melalui serat optik transmitter. Perubahan intensitas cahaya tersebut ditangkap oleh fotodioda OPT101 melalui serat optik receiver. Tegangankeluaran yang dihasilkan oleh fotodioda OPT101 digunakan sebagai indikator untuk mencacah frekuensi pernapasan manusia. Pengujian alat ukur dilakukan dengan variasi umur dan variasi aktivitas. Hasil pengujian menunjukkan, jarak sensor serat optik terhadap membran yang optimal adalah 1 mm dan tegangan keluaran rata-rata sebesar 4,2 volt. Akurasi alat ukur frekuensi pernapasan manusia ini sebesar 91% berdasarkan variasi umur pengguna dan 88% berdasarkan variasi aktivitas pengguna.Kata kunci: fotodioda OPT101, frekuensi, getaran, laser dioda, seratoptik
Rancang Bangun Alat Ukur Konsentrasi Oksigen yang Dihasilkan oleh Fotobioreaktor Mikroalga Chlorella Vulgaris Aminah Nurrahmawati; Harmadi Harmadi; Nadya Okta Biolita
Jurnal Otomasi Kontrol dan Instrumentasi Vol 10 No 1 (2018): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2018.10.1.5

Abstract

AbstrakTelah dilakukan perancangan alat ukur konsentrasi oksigen yang dihasilkan oleh fotobioreaktor mikroalga Chlorella vulgaris. Sensor yang digunakan adalah sensor SK-25F dengan penguat non-inverting sebagai pengondisi sinyal. Penguat non-inverting digunakan untuk menguatkan tegangan keluaran sensor yang masih dalam skala mV supaya dapat diproses oleh mikrokontroler Atmega328 pada Arduino Uno R3. Pengukuran dilakukan pada dua fotobioreaktor yakni fotobioreaktor yang disuplai  dan yang tidak disuplai CO2 dan menggunakan tiga jenis sumber cahaya yaitu lampu halogen, LED dan cahaya matahari, selain itu, pengukuran juga dilakukan pada fotobioreaktor pada keadaan tanpa cahaya (0 lux). Nilai konsentrasi oksigen maksimum dihasilkan oleh fotobioreaktor yang disuplai dengan CO2. Persen error rata-rata alat yang dirancang sebesar 1,383% yang didapatkan dengan membandingkan nilai alat yang dirancang dengan alat ukur acuan (Gas Alert Microclip).
Co-Authors Adrial, Rico Afdal Afdal Afdhal Muttaqin Ahmad Fauzi Pohan Alimin Mahyudin Aminah Nurrahmawati Astuti Astuti Dahyunir Dahlan Dedi Mardiansyah Dian Milvita Dwi Pujiastuti Dwi Puryanti Elistia Liza Namigo, Elistia Elvaswer Elvaswer Fani Anjelina Feriska Handayani Irka, Feriska Handayani Geby Sri Ayu Oktavia Imam Taufiq Iqbal Ramadhan Lukita Sari Ikhsan M. Ali Shafii Marzuki Marzuki Meqorry Yusfi Muhammad Arif Muhammad Kahfi Muldarisnur, Mulda Mutya Vonnisa Nadya Okta Biolita Naela Amalia Zulfa Nini Firmawati Nurul Annisa Rahmat Rasyid Solly Aryza Sri Handani Sri Oktamuliani Trengginas Eka Putra Sutantyo Usna, Sri Rahayu Alfitri Veithzal Rivai Zainal Zulfi Zulfi