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Comparison of Absorbed Dose in Plasticine Bolus and Silicone Rubber Bolus Leony Chantika Leony; Viesca Fredilla Hanif; Eli Defira; Sri Oktamuliani Oktamuliani; Afdhal Muttaqin; Muhammad Ilyas
Journal of Physics: Theories and Applications Vol 6, No 1 (2022): Journal of Physics: Theories and Applications
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jphystheor-appl.v6i1.59117

Abstract

Bolus is a radiotherapy device used to increase the surface dose in the skin surface area when using electron or photon beams. The most commonly used bolus is a bolus made from plasticine, in addition to a plasticine bolus there is also a bolus made from silicone rubber which is currently being developed. This study aims to determine which bolus is more effectively used in radiotherapy, by comparing the absorbed dose, the value of Relative Electron Density (RED), and the transmission factor of each bolus. In this study, silicone rubber and plasticine boluses were made with dimensions of 12 cm x 12 cm, the variation of energy used in LINAC was 9 MeV and 12 MeV and the thickness variation of each bolus was 0.5 cm, 1.0 cm, 1, 5 cm and 2.0 cm. The RED value obtained from the plasticine bolus for a thickness of 0.5 cm is 0.837 g/cm3, a thickness of 1.0 cm is 1.011 g/cm3, a thickness of 1.5 cm is 1.06 g/cm3, and a thickness of 2.0 cm of 1.072 g/cm3, while for silicone rubber bolus for a thickness of 0.5 cm is 1.146 g/cm3, a thickness of 1.0 cm is 1.151 g/cm3, a thickness of 1.5 cm is 1.17 g/cm3, and a thickness of 1.5 cm is 1.17 g/cm3 2.0 cm is 1.193 g/cm3. From the results of the study for the RED value of each bolus, it can be concluded that the silicone rubber bolus has a RED value that is more consistent with the water density value compared to the plasticine bolus. Silicone rubber and plasticine boluses can also be said to be absorbent materials because the transmission factor value of both boluses is below 100%. From the results of the study, silicone rubber boluses were more able to reduce the range of absorbed doses compared to plasticine boluses.
THE EFFECT OF SYNTHETIC ZEOLITES ON SENSITIVITY AND STABILITY OF URIC ACID BIOSENSOR USING CYCLE VOLTAMETRY METHOD Iza Faizah; Dwi Puryanti; Afdhal Muttaqin
Spektra: Jurnal Fisika dan Aplikasinya Vol 3 No 3 (2018): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 3 Issue 3, December 2018
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (285.882 KB)

Abstract

The synthesis of synthetic zeolite modified biosensor material has been carried out to detect uric acid. This study aims to look at the effect of synthetic zeolite on uric acid biosensor material on sensor stability and sensitivity. The biosensor was use to measure uric acid using uricase produced Lactobacillus plantarum. Modification of biosensor material using synthetic zeolite content of Sodalit is added in a mixture of graphite and paraffin. Carbon paste electrode (EPK) was made with graphite and paraffin comparison 70 mg : 30 mg, while zeolite modified carbon paste electrode (EPKZ) with graphite, paraffin and zeolite comparison 50 mg: 30 mg: 20 mg. In each electrode, 7.5 μl of L.plantarum pellet (EPKZLP) was dropped. Electrode performance testing was carried out using Cyclic Voltammetry. Modification results affect biosensor performance such as sensitivity and stability. The highest current is produced by EPKZLP with a current range of 0.0143 - 0.0592 mA. The best sensitivity is produced in EPKZLP with a value of 0.031 mAcm-2mM-1. The best stability was found in EPKZLP with a percentage of stability on day 14 was 30.9%. The average standard deviation generated in this study is 0.0024 mA with a relative error value was 7.8%. Addition of zeolite to biosensor material produced in this study has met several criteria to be used as a sensor. Keywords: uric acid biosensor, zeolite, sodalit, sensitivity, stability.
SYNTHESIS OF SODALITE ZEOLITE FROM COAL BOTTOM ASH WITH VARIATION OF NaAlO2 CONCENTRATION USING ALKALI MELTING HYDROTHERMAL METHOD Rahmatul Hanifah; Dwi Puryanti; Afdhal Muttaqin
Spektra: Jurnal Fisika dan Aplikasinya Vol 3 No 3 (2018): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 3 Issue 3, December 2018
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (157.873 KB)

Abstract

Synthesis of zeolites from bottom ash using alkali melting hydrothermal method with variation concentration of NaAlO2 solution had been done. Concentration of NaAlO2 solution was varied for 2,5 M (Z1), 2 M (Z2), 1,5 M (Z3) and 1 M (Z4). The bottom ash and NaOH are melted for 3 hours at 750C. Then, the sample is heated through a hydrothermal process with NaAlO2 crystallization medium. Then the sample is neutralized with aquades up to pH 9-10. Characterization of sample includes characterization zeolite type using of. The results of characterization using XRD show that the zeolite formed on samples Z1, Z2, and Z3 are zeolites of sodalite type and on Z4 sample of zeolite type are sodalit, nosean, and megakalsilit. The highest sodalite purity was obtained in Z3 sample, which is 73%.
Optimalisasi Pemanfaatan Media Online Phet Simulation Untuk Upaya Peningkatkan Pemahaman Konsep Fisika di SMA N 2 Harau Ramacos Fardela; Dedi Mardiansyah; Meqorry Yusfi; Elistia Liza Namigo; Afdal; Mutya Vonnisa; Muldarisnur; Harmadi; Imam Taufiq; Ahmad Fauzi Pohan; Astuti; Afdhal Muttaqin; Dian Fitriyani; Dwi Pujiastuti; Sri Handani; Dwi Puryanti; Trengginas Eka Putra Sutantyo; Zulfi; Feriska Handayani Irka; Alimin Mahyudin; Nini Firmawati; Dian Milvita; Sri Oktamuliani; Sri Rahayu Alfitri Usna; Rico Adrial
Indonesian Journal of Community Empowerment and Service (ICOMES) Vol. 2 No. 2: December 2022
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (561.748 KB) | DOI: 10.33369/icomes.v2i2.24459

Abstract

Fisika menganut metodologi ilmiah (sains) yang memuat tiga kegiatan terpadu dan membentuk daur (cycles) empirico-logico-verification yang pertama kali dirintis oleh I. Newton yaitu (1) pengamatan gejala-gejala alam (kegiatan empiris melalui fisika eksperimen), (2) Penalaran untuk menjelaskan hasil pengamatan tersebut dan ekstensinya sehingga mampu menghasilkan ramalan mengenai gejala baru (kegiatan berlogika melalui fisika teori) dan (3) pengujian mengenai kesesuaian ramalan tersebut dengan realitas alam (kegiatan verifikasi melalui fisika eksperimen). Keberadaan laboratorium di sekolah-sekolah menjadi kunci keberhasilan dalam memperkenalkan tiga kegiatan terpadu tersebut. Sekolah Menengah Atas Negeri (SMAN) 2 Harau, Kabupaten Lima Puluh Kota merupakan sekolah di bawah naungan Provinsi Sumatera Barat dengan jarak sekitar 138 km dari Jurusan Fisika FMIPA Universitas Andalas tepatnya berada di Kecamatan Harau. Dari informasi yang diperoleh masih terbatasnya sarana dan prasarana seperti jumlah peralatan praktikum. Berdasarkan hal tersebut, tim pengabdian Jurusan Fisika FMIPA Universitas Andalas akan melaksanakan rangkaian kegiatan pengabdian masyarakat di SMA N 2 Harau dengan pemanfaatan media online salah satunya Phet- Simulation. Hasil pengabdian menunjukkan 90 % siswa mengatakan setuju dan sangat setuju bahwa kegiatan seperti ini memberikan manfaat bagi pemahaman materi di bidang Fisika. Kegiatan seperti ini perlu dilakukan lebih banyak oleh Tim Pengabdian sehingga masyarakat merasakan keberadaan perguuruan tinggi yang ada didaerahnya. Kata kunci: PhET Colarado; Simulasi Fisika; dan Pengabdian Masyarakat
Pengelolaan Laboratorium Bagi Guru-Guru Fisika dan Perancangan Laboratorium Percontohan di SMAN 2 Harau Dedi Mardiansyah; Afdhal Muttaqin; Ramacos Fardela; Feriska Handayani Irka; Astuti; Sri Handani; Harmadi; Dahyunir Dahlan; Zulfi; Rahmad Rasyid; Marzuki; Mohammad Ali Shafii; Arif Budiman; Elvaswer; Mora; Wildian
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 1 (2023)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (543.253 KB) | DOI: 10.31949/jb.v4i1.3632

Abstract

Laboratorium merupakan salah satu sarana dan prasarana pembelajaran fisika di sekolah untuk menarik pembelajaran dan mendorong motivasi siswa dalam belajar fisika. Kegiatan yang dilaksanakan di laboratorium biasanya dalam bentuk praktikum atau demonstrasi. Laboratorium harus dikelola dan direncanakan dengan baik agar fungsinya optimal sebagai sarana pembelajaran fisika. Hasil observasi di beberapa SMA yang ada di Kabupaten Lima Puluh Kota ditemukan permasalahan bahwa laboratorium tidak dikelola dengan baik sehingga keberadaanya tidak efektif. Siswa jarang diajak praktikum di laboratorium. Alat-alat praktikum yang sudah diperoleh dari Dinas Pendidikan jarang digunakan untuk kegiatan praktikum, sehingga banyak alat yang sudah rusak karena jarang dipakai. Penataan alat dan fasilitas di laboratorium cukup memprihatinkan, tidak tertata dengan rapi dan tidak di inventaris dengan baik. Guru fisika kesulitan dalam mengadakan praktikum karena tidak adanya modul praktikum/buku petunjuk praktikum. Oleh karena itu kegiatan praktikum yang biasanya dilaksanakan di laboratorium kini dilaksanakan di ruang kelas dengan peralatan yang seadanya. Ini menyebabkan keberadaan laboratorium fisika tidak dimanfaatkan dengan baik. Atas dasar permasalahan-permasalahan tersebut, maka kami tim Pengabdian Kepada Masyarakat mengadakan pembinaan pengelolaan laboratorium fisika bagi guru-guru MGMP fisika yang ada di Kabupaten Lima Puluh Kota agar para guru fisika mampu mengelola laboratorium dengan baik sehingga dapat digunakan untuk kegiatan praktikum maupun proses pembelajaran. Rencana kegiatan PKM antara lain 1) Memberikan sosialisasi pengelolaan laboratorium, 2) Melakukan pengembangan Laboratorium Percontohan Implementasi Merdeka Belajar, 3) Melakukan diskusi pembuatan alat-alat praktikum dari peralatan sederhana, 4) Melakukan diskusi pembuatan modul praktikum/ buku petunjuk praktikum, dan 5) Melakukan monitoring awal dan lanjutan terhadap laboratorium dibeberapa sekolah yang berada di Kebupaten Lima Puluh Kota.
Pengembangan alat ukur kapasitas vital paru-paru dan frekuensi pernapasan manusia berbasis sensor serat optik Mega Roza Lia; Harmadi Harmadi; Afdhal Muttaqin
Jurnal Ilmu Fisika Vol 15 No 1 (2023): March 2023
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.15.1.39-47.2023

Abstract

The development of measuring instruments for vital lung capacity and human respiratory rate based on the fiber-optic sensor has a system consisting of a laser diode as a light source, optical fiber as a waveguide, and OPT101 as a photodetector. This research consists of three stages: hardware design, software design, and data analysis. Each component used is tested and then tested on the entire system to determine each component's performance when used together. In the software system, the analog signal in the form of voltage from OPT101 is converted into an ADC value by an analog-to-digital converter. Based on the ADC value obtained, the threshold value is determined as the threshold for reading the respiratory rate. The number of ADC values ​​during the measurement of vital lung capacity is then converted to volume. Testing of measuring instruments is carried out by comparing the results of instruments developed with a standard medical measuring device. The results of the tests and analyses that have been carried out have obtained an accuracy value of 92.62% for the measurement of vital lung capacity, 95.14% for the measurement of respiratory rate, and 92.62% for the measurement of the respiratory rate of variations in activity.
VERIFIKASI DOSIMETRI ANISOTROPIC ANALYTICAL ALGORITHM (AAA) PADA TREATMENT PLANNING SYSTEM (TPS) ECLIPSE BERDASARKAN VARIASI MULTILEAF COLLIMATOR Fadillah Ahmad; Afdhal Muttaqin; Dian Fitriyani; Ridwan Ridwan
Jurnal Ilmu Fisika Vol 15 No 1 (2023): March 2023
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.15.1.48-55.2023

Abstract

Dosimetry verification of anisotropic analytical (AAA) algorithms based on variations of the multileaf collimator has been investigated using the Eclipse Treatment Planning System. This study used a 0.6cc ionization chamber farmer detector and Linac Clinical CX variant equipped with TPS Eclipse with AAA. This study used 6 MV energy and 2 Gy dose. The multileaf collimator was varied into six groups with the size (A, B, C, D, E, F) of the irradiation field used 20 cm x 20 cm. The measurement results were a dose deviation value or a dose ratio presentation in each irradiation area. The dose deviation of the multileaf collimator variation was A 0.86% for each group. Group B had 6.8%, Group C had -0.43%, Group D had 0.73%, Group E had 1.11%, and Group F had 0.84%. The mean dose deviation value for all multileaf collimator forms was 1.67%, where this value is within the tolerance value recommended by ICRU, namely 3-5%. The p-value in the Analysis of variance (ANOVA) for the entire group was 0.00. This data shows that there is no effect of variation in the multileaf collimator on the dose given.
Sekolah Binaan-HIMAFI Universitas Andalas Mengajar SMP 41 Padang Afdhal Muttaqin; Ahmad Fauzi Pohan; Imam Taufiq; Trengginas Eka Putra Sutantyo; Mora; Zulfi; Wildian; Dedi Mardiansyah
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2023)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (455.376 KB) | DOI: 10.31949/jb.v4i2.4670

Abstract

Kebijakan Kampus Mengajar merupakan bagian dari program Merdeka Belajar oleh Kementerian Pendidikan, Kebudayaan, Riset, dan Teknologi Republik Indonesia. Program ini memberikan kesempatan kepada mahasiswa untuk membantu guru dan kepala sekolah dalam melaksanakan kegiatan pembelajaran pada sekolah yang membutuhkan pendampingan. Tujuan dari pembelajaran ini adalah untuk mengenalkan ilmu Fisika kepada Siswa SMP melalui pendekatan yang menarik. Sejauh ini, pada umumnya siswa SMP menganggap Ilmu Fisika merupakan ilmu yang sulit untuk dipahami. Sehingga diperlukan pendekatan khusus dalam penyampaiannya dan menjadi menarik. Mitra yang terlibat dalam pengabdian ini yakni SMP 41 Padang. Pengabdian ini dilaksanakan dalam tiga tahap yakni : 1. Persiapan dengan mengikuti pembekalan dan melakukan observasi sekolah penempatan. 2. Pelaksanaan HIMAFI mengajar; dan 3. Melakukan evaluasi hasil pelaksanaan program HIMAFI Mengajar. Dalam pelaksanaan kegiatan ini, siswa yang mengikuti kegiatan ini terlihat antusias dalam kegiatan ini. Siswa juga didorong untuk aktif bertanya dan menyampaikan ide kreatif.
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.
PENGAYAAN MATERI FISIKA : INDUKSI ELEKTROMAGNETIK DI SEKOLAH MENENGAH ATAS Ramacos Fardela; Zulfi Zulfi; Afdhal Muttaqin; Marzuki Marzuki; Dedi Mardiansyah; Mora Mora; Muldarisnur Muldarisnur; Harmadi Harmadi; Rahmad Rasyid; Dahyunir Dahlan; Elvaswer Elvaswer; Imam Taufiq; Wildian Wildian; Trengginas Eka Putra Sutantyo; Feriska Handayani Irka; Dwi Puryanti; Rani Delvihardini
MONSU'ANI TANO Jurnal Pengabdian Masyarakat Vol 6, No 2 (2023)
Publisher : Universitas Muhammadiyah Luwuk

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32529/tano.v6i2.2992

Abstract

The concept of electromagnetic induction is very important in understanding and developing modern electrical technology. Some factors cause students to often find it difficult to understand electromagnetic induction material in school is that this material involves abstract concepts such as magnetic flux, magnetic field changes, and emf. For some students, understanding these concepts may be difficult due to a lack of direct experience or concrete representations. Enrichment of physics material on electromagnetic induction has been implemented at SMA N 1 Gunung Talang. This service activity aims to improve students' understanding of the basic concepts of Electromagnetic Induction in Class XII. This service consists of three stages including: preparation, implementation and evaluation. The evaluation of this activity was carried out by comparing the pre-test results before enrichment and the post-test scores of students after being given enrichment material by the lecturer (service team). The results obtained show an increase in student knowledge towards understanding the concept of electromagnetic induction. This service activity can be an effort for school and university cooperation to support student success in understanding physics concepts that are considered complicated
Co-Authors A. Fadhil Desafa Adrial, Rico Afdal Afdal Afdal Afdal Afdal Afdal, Afdal Ahmad Fauzi Pohan Alfian Darmawan Alimin Mahyudin Analia, Rika Anggi Anggi Anggi, Anggi Arif Budiman Arif Budiman Astuti Astuti Astuti - Astuti Astuti Astuti Astuti Betta Centaury Dahlianum, Dahlianum Dahyunir Dahlan Damayanti, Elok Dedi Mardiansyah Delvihardini, Rani Desy Yulia Ningsih Dewi Fajriani Dian Fitriyani Dian Fitriyani Dian Milvita Dwi Pujiastuti Dwi Pujiastuti Dwi Puryanti Efendi Efendi Eka Putra Sutantyo, Tringginas Eli Defira Elistia Liza Namigo, Elistia Elvaswer Elvaswer Elvaswer Emriadi - Fadillah Ahmad Faizah Faizah Faizah Faizah Fani Anjelina Febriati Nanda Feriska Handayani Feriska Handayani Irka, Feriska Handayani Fifi Yunica Fifi Yunica Fiqi Diyona Fiqi Diyona, Fiqi Fuji Astuti Febria Geby Sri Ayu Oktavia Haldis Alvaro Hamidah . Hamidah Hamidah Hanifah, Rahmatul Hanisti, Fidhia Harmadi Harmadi Harmadi Harmadi Haryanto Saputra Herviya, Herviya Herviyana, Herviyana Ilham, Muhammad Samudra Imam Taufik Imam Taufiq Imam Taufiq Imam Taufiq Isdi, Muhammad Ridho Iza Faizah J Juniarti Leony Chantika Leony Lestari, Tuti M. Ali Shafii Machmudah Mairawita, Mairawita Marzuki Marzuki Marzuki Marzuki Mega Roza Lia Meqorry Yusfi Mildawati Mildawati Mohammad Ali Shafii Mora Mora Mora Mora Mora Mora Muhammad Ilyas Muhammad Ilyas Muldarisnur, Mulda Murdahayu Makmur Musra, Faizah Mutya Vonnisa Nanda, Febriati Narwen Narwen Nila Sriwahyuni Nila Sriwahyuni, Nila Nini Firmawati Nita Kurnia Sari Novelia Tohiri Nurhabibah Nurhabibah Nurhabibah Nurhabibah Nurul Annisa Nurwijayanti Oktavia, Amel Olly Norita Tetra Olly Norita Tetra Pratama, Teguh Nugraha Rafli, Rhandyka Rahmad Rasyid Rahmad Rasyid Rahmat Rasyid Rahmatul Hanifah Rahmatul Hanifah Ramacos Fardela Rani Delvihardini Rena, Suci Ramda Ria Susmita Ridwan Ridwan Ridwan, Ridwan Rika Juniarti Waleza, Rika Juniarti Rully Mandela Rully Mandela, Rully Salim Muhaimin Saputra, Haryanto Sari, Nita Kurnia Sofhia Ulga Solfiyeni Solfiyeni Solly Aryza Sri Handani Sri Oktamuliani Syafwan, Mahdivan Teguh Nugraha Pratama Tiya Lestari Tiya Lestari, Tiya Tohiri, Novelia Trengginas Eka Putra Trengginas Eka Putra Sutantyo Ulga, Sofhia Usna, Sri Rahayu Alfitri Viesca Fredilla Hanif Wildian Wildian Wildian Yefrida - Yunisa Oktaviani Yunisa Oktaviani, Yunisa Zhafirah Putri Fadhilah Zozy Aneloi Noli Zulfi Zulfi Zulfi Zulfi Zulfi Zulfi Zulfi Zulfi Zulfi Zulfi, Zulfi