Article Per Year (5 Year)
p-Index From 2020 - 2025
6.072
P-Index
This Author published in this journals
All Journal EKSAKTA: Journal of Sciences and Data Analysis Jurnal Penelitian dan Pembelajaran Fisika JURNAL FISIKA JFA (Jurnal Fisika dan Aplikasinya) Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika JPSE (Journal of Physical Science and Engineering) Science and Technology Indonesia Jurnal Penelitian Sains Jurnal Penelitian Pendidikan IPA (JPPIPA) INDONESIAN JOURNAL OF APPLIED PHYSICS Dinamisia: Jurnal Pengabdian Kepada Masyarakat Journal of Physics and Its Applications JURNAL EKSAKTA PENDIDIKAN (JEP) JURNAL PENDIDIKAN TAMBUSAI Eksakta : Berkala Ilmiah Bidang MIPA MANAZHIM Sainstek : Jurnal Sains dan Teknologi Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Natural Science: Jurnal Penelitian Bidang IPA dan Pendidikan IPA Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika Indo-MathEdu Intellectuals Journal Journal of Renewable Energy, Electrical, and Computer Engineering JRFES Indonesian Journal of Physics (IJP) Physics Learning and Education Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Hamdi Rifai
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Universitas Negeri Padang, Jl. Prof. Dr. Hamka, Padang,
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

Published : 65 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 65 Documents
Search

 3   4   5   6   7 
Pengintegrasian Wahana Permainan Wisata Alam Ngarai Sianok dan Wisata Buatan MiFan Water Park Padang ke dalam Materi Fisika Hamdi Rifai; Yohandri Yohandri; Dewi Puspa Sari; Wenda Emafri
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 3 No 2 (2019): JEP : Jurnal Eksakta Pendidikan
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jep/vol3-iss2/400

Abstract

Edupark is a park with a variety of rides and ecosystems that can be used as a learning tool. Ngarai Sianok, Bukittinggi is a national Geopark area that has a nature tourism vehicle and Minang Fantasy (MiFan) Padang Panjang Water Park is an artificial tourist game vehicle. In general, visitors to attractions only take advantage of the natural landscape or a vehicle to take photos, sports such as jogging, hiking, camping, family gathering or low impact outbound. Without them knowing it, there are many physics concepts in both natural and artificial games that can be used as learning resources by integrating into high school physics learning in the form of physics teaching materials or integrated in learning models. However, there are actually educa-tional values, especially the physical concepts contained in the game. The purpose of this study is to integrate Edupark Ngarai Sianok and MiFan Water Park because it remembers so many Physics concepts found in natural or artificial tourism. The process of collecting data through observation and study of literature. The results showed that Edupark physics could be integrated in learning physics according to the 2013 curriculum
Tingkat Penerapan Pendekatan Saintifik antara Buku Ajar Edupark Fisika Mifan Waterpark Padang Panjang dengan Buku Standar Elsi Trisma; Hamdi Hamdi; Dewi Puspa Sari
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 4 No 1 (2020): JEP : Jurnal Eksakta Pendidikan
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jep/vol4-iss1/424

Abstract

The scientific approach is a learning process that is procedurally designed according to the general steps of scientific activity. This study aims to determine the suitability of the application of the scientific approach in accordance with the 2013 curriculum for SMA / MA. The research used is descriptive research with a qualitative approach. The population in this study was the Edupark Physics research books. The standard book used is seen from several high school physics textbooks made in Indonesia and used in West Sumatra. The sample in this study was the Edupark Textbook of Mifan Waterpark Padang Panjang Physics and standard books namely Physics book for SMA / MA class X curriculum 2013 revised 2016 and class XI curriculum 2013 in 2017 published by Erlangga with the instruction of Marthen Kanginan. The data in this study were taken using research instruments and data collection techniques through documentation studies. The results showed that the level of appropriateness of the application of the scientific approach in the textbook Edupark Physics Mifan Waterpark Padang Panjang based on Permendikbud No. 103 of 2014, there are still many subject matter that have not applied the steps in the scientific approach, so that the results obtained are not in accordance with the percentage 39.6 %. Whereas the standard book that is used has a percentage of 38.2% with the category not quite right. Thus it can be concluded that the Teaching Edupark Textbook of Mifan Waterpark Padang Panjang has a category that is equivalent to the standard book used. However, it is necessary to conduct a review so that the application of the scientific approach to the two books has more appropriate results.
Characterization of Magnetic Minerals of Iron Sand Pasia Nan Tigo Padang Beach Using X-Ray Diffraction (XRD) Ardilla Nofri Yuwanda; Riza Rahmayuni; Dwi Anisa Visgun; Anisa Rahmi; Hamdi Rifai; Letmi Dwiridal
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): IJAP Volume 12 ISSUE 01 YEAR 2022
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.51531

Abstract

The mineral extraction of iron sand from Pasia Nan Tigo Beach has been carried out. Iron sands in this area are widely spread and have decent potential but have not been used optimally. The iron sand of Pasia Nan Tigo Beach contains minerals that are indicated by the variation in susceptibility values of type 265.8×10-8m3/kg to 12,445.53×10-8m3/kg. Therefore, it is necessary to separate minerals from iron sand so that the minerals contained in them are known so that they are suitable for usability. The iron sand obtained is extracted using two magnets, namely a strong magnet and a weak magnet. The extraction results from iron sand still contain impurities to remove them, the sand is purified and then the sand extraction results are characterized using the XRD method. Content The type and structure of the mineral species found in the samples extracted from iron sand using strong magnets are Magnetite (Fe3O4) with Cubic structure, Hematite (α-Fe2O3) with Hexagonal structure, and Ilmenite (FeTiO3) with Hexagonal structure. While the use of weak magnets is Magnetite (Fe3O4) with Cubic structure, Hematite (α-Fe2O3) with Rhombohedral structure, and Ilmenite (FeTiO3) with Rhombohedral structure. Meanwhile, the non-magnetic mineral namely Quartz (SiO2), works as an impurity. The average crystal size using a strong magnet for PNT-B01 0-5 cm is 100.85 nm and a weak magnet is 49.36 nm, sample A06 30-35 cm uses a strong magnet of 88.25 nm and a weak magnet of 46, 80 nm, meanwhile sample B10 0-5 cm with a strong magnet of 109.22 nm and a weak magnet of 45.60 nm.
Analysis of b-Value and Peak Ground Acceleration (PGA) in West Sumatra Province using Maximum Likelihood Method and Empirical Formula (Earthquake data Period 2007-2020) Fandu Alfadilah; - Syafriani; - Hamdi; Letmi Dwiridal; Fajri Syukur Rahmatullah
PILLAR OF PHYSICS Vol 15, No 1 (2022)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12553171074

Abstract

West Sumatra Province has four active fault segments, namely part of the Sumatran fault zone which causes frequent earthquakes. Therefore, it is necessary to research b-value analysis and PGA in the province of West Sumatra by using the maximum likelihood method and empirical formula for earthquake disaster mitigation efforts. This study aims to determine the b-value associated with rock stress and PGA as the level of earthquake activity and analyze the distribution map. The data used is earthquake data for the period 2007-2020 with a magnitude ≥ 5 SR and a depth of ≤ 100 km. The results of data processing produce a map of the distribution of b-value and PGA in the province of West Sumatra. The b-value in each region ranged from 0.8421-1.4477. Based on the b-value distribution map, the area that has the smallest b-value is in region 6, while the largest value is in region 2. A low b-value correlates with high rock stress conditions. This value illustrates that area 6 has a high chance of a major earthquake occurring. Furthermore, the calculation of the PGA value refers to the general form of Lin and Wu's empirical equation to obtain a new empirical formula model. The value of the coefficient a=−1.20543, b=−0.839093, and c=6.88858. The PGA value of West Sumatra province ranges from 10.87-376.98 gal. The city/regency with the largest PGA value is in the Mentawai Islands Regency, which ranges from 84.11-328.17 gal and the lowest value is in Dharmasraya Regency, which is between 10.87-35.28 gal.
Identification of Elemental Content and Rock Types in West Lampung Regency Nadya Fitra Kurnia; Hamdi Rifai; Syafriani Syafriani; Letmi Dwiridal; Fatni Mufit
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 3, ISSUE 2, August 2022
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol3.iss2.art1

Abstract

Rock is a constituent of the earth's crust from a collection of minerals that harden due to natural processes. Rocks formed from volcanic eruption materials in each place have different characteristics in distribution patterns, types of minerals and the content of elements contained therein. These rocks contain elements that form magnetic minerals. However, in rocks in West Lampung Regency the elemental content in the rocks has not been identified. This study aims to determine the composition of rock-forming elements and rock types found in West Lampung Regency. The elemental content in rocks can be identified using X- Ray Fluorescence (XRF) and determine rock types using SiO2and K2O diagrams. The results of the analysis using XRF show that Si (Silica) is the most dominant element found in 4 rocks in Lampung Regency. West. In addition, the elements found in rocks in West Lampung are Al, Si, K, Ca, Fe, P, Cl, Ti, Mn, Ni, Cu, Zn, Ga, As, Rb, Sr, Y, Zr, Ag, In, Eu, and Pb , from the content of these elements there are elements that form magnetic minerals, namely Fe and Ti , with rock types of Foidite and Decite.
Magnetic Susceptibility of Volcanic Soil on the Surface of Mount Singgalang, Sumatra Barat Azmi Renaldi Renaldi Alrahmadana; Hamdi Rifai; Syafriani Syafriani; Fatni Mufit; Nofi Yendri Sudiar
Jurnal Fisika dan Aplikasinya Vol 18, No 2 (2022)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v18i2.12361

Abstract

Volcanic soil is a part of interest for physical, chemical, and morphology studies of soil derived from volcanic ash, which is known to be fertile and is one of the most productive soils in the world. They are also known to have a high environmental carrying capacity, as evidenced by the dense population in the area around the volcano. The soil contains many minerals, one of which is magnetic minerals. However, there is no document so far that records the value of the magnetic susceptibility of volcanic soil on the surface of Mount Singgalang. This study aims to determine the abundance of magnetic minerals based on their magnetic susceptibility values. To achieve this goal, the rock magnetism method is applied with the Bartington magnetic susceptibility meter type MS2B sensor instrument. Magnetic susceptibility values can be used as initial characteristics to understand past volcanic processes and explain environmental changes. This method is very effective, inexpensive, sensitive, fast, and non-destructive. The results showed that the value of the magnetic susceptibility of volcanic soils varied with a value range of 93.3 - 352.5 (x10−8 m3/kg). Based on this value, it is assumed that the magnetic mineral properties are antiferromagnetic. The average frequency dependent susceptibility (χfd) (%) ranges from 0.831 - 2.090 %, indicating that the measured volcanic soil contains almost no superparamagnetic grains and is generally dominated by multi-domain grains.
Challenges in the Measurement of LUSI’s Physical Properties Hamdi Rifai; Satria Bijaksana; Umar Fauzi; Bagus E. B. Nurhandoko
Indonesian Journal of Physics Vol 18 No 4 (2007): Vol. 18 No. 4, October 2007
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (622.565 KB)

Abstract

An extraordinary mud volcano, commonly referred to as LUSI or Lumpur (mud) Sidoarjo, erupted in May of 2006 in Sidoarjo, East Java. Since then, LUSI has claimed approximately 700 hectares of rice fields, factories, villages and other infrastructures. A bold attempt to reduce the volume of mud by inserting sets of high density chained balls (HDCB) has been tried by a team of scientists and engineers from Bandung Institute of Technology. This effort requires, among others, measurement of LUSI’s physical properties (temperature, density, water content, viscosity, magnetic susceptibility, etc.) as a part of its evaluation and monitoring system. We will describe how this challenging task was performed. The environment in which the samples were obtained is harsh as the in situ temperature of the mud is about 90 degree centigrade, the ground in unstable, and the presence of water vapor with high content of H2S. In general, mud samples were collected on daily basis during the HDCB insertion. The results of these measurements of physical properties are valuable in assessing the effectiveness of the HDCB operation.
Application of Rock Magnetic Methods to Landslide Disaster Vulnerability: a Case Study (Malalak, Agam Regency) Cindy Rara Silvia; Hamdi Rifai; - Akmam
PILLAR OF PHYSICS Vol 15, No 2 (2022)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/13024171074

Abstract

Malalak is a landslide-prone area that has an undulating hilly topography with a height of more than 850 meters above sea level. Landslide potential can be determined by the value of magnetic susceptibility Percent Frequency-Dependent Susceptibility (%). The study was conducted on slopes where landslides have occurred (A) and have not occurred (B) using the rock magnetism method to compare the potential for landslides on the slopes. Soil that has been taken and measured using a Bartington Magnetic Susceptibility Meter sensor type B (MS2B), the measured values are analyzed and interpreted to see a comparison between two different samples. The results showed that the value of low-frequency magnetic susceptibility () ranged from 447.5-698.8× with an average of 580.6×, it is estimated that the magnetic mineral is ferrimagnetic with the type of mineral Hematite (Fe2O3). The graph of the relationship between the values of lf and fd% on slope A has a value of % > 2% and a slope B of % < 2%. Slope A contains superparamagnetic grains between 10%-75% which is a mixture of fine and coarse-sized superparamagnetic grains, while slope B does not exist or contains less than 10% superparamagnetic grains. The samples with high superparamagnetic grain content were almost all fine-grained soils which caused the level of soil mineral attachment by water to decrease. So that when the rainfall is high, the soil becomes saturated and accumulates on the slip plane, causing lateral movement on the slopes and landslides to occur
Identification of Clay Element Content in Fabric Dyeing Process Using X-Ray Fluorescence Spectrometry Nengsih, Reni Fitria; Rifai, Hamdi; Dwiridal, Letmi; Akmam, Akmam; Fauzi, Ahmad; Yusrizal, Yusrizal
Jurnal Fisika Vol 12, No 1 (2022)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v12i1.34991

Abstract

Clay in West Sumatra has been used as a natural dye for batik, so the batik is known as clay batik. The dyeing of the cloth is done by boiling and soaking the clay together with the cloth for 10 days. The color of the fabric is caused by certain elements present in the clay. Currently, no one has investigated the changes in elemental content due to the dyeing process. This research aims to investigate the changes in the concentration of the elements that affect the color of the fabric. Samples were taken from 4 areas, namely Solok, Sijunjung, Lima Puluh Kota, and Pesisir Selatan with a total of 8 samples, of which 4 samples were measured before the staining process and 4 more samples after the staining process. Changes in the elemental content of clay were investigated using X-Ray Fluorescence (XRF). The results of the study showed changes in the content of the dominant element, namely Al, Si, and Fe contained in samples CL-PYKLN 2A and CL-TJG GDG 210422. While the samples CL-PSB-SJJ 210421 and CL-SPPS 1 210314 the change in the concentration of the elemental content was not too significant. The elements that cause colored cloth are all elements in clay, but the dominant element in coloring cloth is Fe.
Dissemination of the Existence of the Cave as a Geotourism and Science Study Center Siti Zulaikah; Hari Wisodo; Yoyok Adisetyo Laksono; Cahyo Aji Hapsoro; Hamdi Rifai; Ferdinal Ferdinal; Dini Fitriani; Anis Nurullaili; Muhammad Fathur Rouf Hasan
Dinamisia : Jurnal Pengabdian Kepada Masyarakat Vol. 7 No. 1 (2023): Dinamisia: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/dinamisia.v7i1.12407

Abstract

Keberadaan gua umumnya hanya dimanfaatkan sebagai tempat wisata biasa atau bahkan belum dikembangkan menjadi obyek wisata. Dalam kajian ini, keberadaan gua tidak hanya dikembangkan sebagai tempat wisata biasa, namun dimanfaatkan sebagai wisata edukasi dan Pusat Kajian Ilmu Pengetahuan. Kegiatan ini bertujuan untuk sosialisasi pengembangan fungsi Gua Lowo, Watulimo, Trenggalek sebagai Pusat Kajian Ilmu Pengetahuan. Metode yang digunakan yaitu sosialisasi yang bekerjasama dengan mitra Pemda Kecamatan Watulimo, Trenggalek yang diikuti oleh 30 peserta. Proses evaluasi dilakukan dengan instrumen kuisioner dan Focus Group Discussion. Kegiatan dalam pengabdian masyarakat ini meliputi: pembuatan poster, buku perfectus, serta video yang berisi hasil penelitian sebelumnya, seperti peran gua dalam merekam perubahan iklim dan lingkungan dimasa lampau, perubahan arah medan magnet bumi, serta kejadian gempa dimasa lampau. Hasil kuesioner menunjukkan rata-rata 90% persen responden menyatakan sangat setuju karena mendapatkan pengetahuan baru, sehingga perlu mendapatkan pelatihan lanjutan untuk pemandu wisata profesional. Hasil pengabdian masyarakat ini dapat digunakan sebagai role model bagi pengembangan wisata gua di Indonesia.
Co-Authors Adek Wulandari Adji Waskita Ahmad Fauzi Ahmad Fauzi Akmam Akmam Amelia Roza Haqu Anis Nurullaili Anisa Janna Anisa Meysi Wardi Anisa Rahmi Anisa Rahmi Ardilla Nofri Yuwanda Ardilla Nofri Yuwanda Asrizal Ayu Desra Andira Azmi Renaldi Renaldi Alrahmadana Bagus E. B. Nurhandoko Bayu Kurnia Rahman Caroline Bouvet De La Maisonneuve Cindy Rara Silvia Delvia Safitri Dessupri Niarti Dewi Puspa Sari Dewi Puspa Sari Dewi Puspa Sari Dewi Puspa Sari, Dewi Puspa Dian Syahfitri Dini Fitriani Dini Fitriani Dio Ade Putra Dwi Anisa Visgun Dwi Anisa Visgus Elsa Yanfatriani Elsi Trisma ELvisa, Gita Oktia Emafri, Wenda Erni Erni Fadilla Septiani Fajar Akmal Fajri Syukur Rahmatullah Fandu Alfadilah Faridah Lisa Supian Fathia Rahmi Fatni Mufit Fauzi Ahmad Muda Febbi Angraini Ferdinal, Ferdinal Festiyed Forni, Francesca Francesca Forni Gustika Yonanda Hapsoro, Cahyo Aji Hari Wisodo, Hari Harman Amir Helena Pentury Heni Nofira Hidayati Hidayati Hidayatul Lisma, Rahmi Hilmi Rizki Anjani Husna Husna Husna Husna Irna Humairah Jeffrey Anthony G. Oalmann Kinanti, Ihsania Ikrima Lathifa Zonesya Putri Letmi Dwiridal Letmi Dwiridal Luthfika Putri Antari M. Irvan M. Irvan Maidani, Delvi Putri Marcus Phua Marlisa Angriani Mentari Ritonga Miftahul Arrazi Monica Ihksan Almauiza Muhammad Fathur Rouf Hasan Mutiara Kusuma Febriwanti Nadya Fitra Kurnia Nengsih, Reni Fitria Nofi Yendri Sudiar Nofi Yendri Sudiar Noka Hendra Nur Azizah Nurhabibah Nasution Nurhayati Nurhayati Nurmala Dewi Siregar Nurul Hazwani Pratiwi Ineke Anwar Puput Mulya Sari Putra, Amali Putri Dwi Sundari Putri, Rani Septiani Ramli Ramli Ratnawulan . Renol Afrizon Retna Junia Rima Cemani rina, rina novita Riska Erfina Irsyad Riyasni, Selma Riza Rahmayuni Riza Rahmayuni Rizaldi Putra RR. Ella Evrita Hestiandari Sadraini, Sadraini Sani Aprisilia Satria Bijaksana Selvia Selvia Silvi Yulia Sari Siti Zulaikah Sofya, Rani Solly Aryza Sri Nilam Sari Steffen Eisele Suherman, Dea Stivani sulistiyono, andi Syafriani Syafriani Syafriani Syamina Syamina Sylvina Tebriani, Sylvina Tessa Destia Putri Lisa Titin Agustina Tri Wijayanti Ulil Kurnia Umar Fauzi Venny Haris Viviandri Viviandri Wahyuni Satria Dewi Wenda Emafri Widya Widya Yelda Sufetri Yenni Darvina Yohandri Yoyok Adisetyo Laksono Yulhendri Yulhendri Yuni Wulandari Yurnetti Yurnetti Yusrizal Yusrizal Zaturrahmi Zaturrahmi Zulhendri Kamus