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All Journal Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Berkala Ilmiah Pendidikan Fisika Jurnal Penelitian Pendidikan IPA (JPPIPA) ORBITA: Jurnal Pendidikan dan Ilmu Fisika JURNAL EKSAKTA PENDIDIKAN (JEP) Pillar of Physics: Jurnal Berkala Ilmiah Fisika Journal of Climate Change Society
Rahmat Hidayat
Departement Of Physics, Universitas Negeri Padang, Jl Prof. Dr. Hamka Air Tawar Padang 25131, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Analysis of Students' Attitudes and Difficulties in Studying Computational Physics Revi Indriani; Akmam Akmam; Fatni Mufit; Rahmat Hidayat; Silvi Yulia Sari
Berkala Ilmiah Pendidikan Fisika Vol 10, No 1 (2022)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/bipf.v10i1.12408

Abstract

Ideally, students who study Computational Physics are required to think computationally. However, student learning outcomes tend to be low. Low learning outcomes are suspected by students having difficulties. One of the causes of learning difficulties is students' attitude in responding to learning. This study aims to determine student attitudes in studying Computational Physics and the factors influencing student learning difficulties. This research is descriptive research with a quantitative approach. The population in this study were students of Physics FMIPA UNP. The sample in this research is students who take Computational Physics courses in January-June 2021. The data analysis technique used is the multivariate analysis based on factor loading testing with Confirmatory Factor Analysis (CFA) using Lisrel 8.80. The results showed that students' attitudes toward Computational Physics were good, with a percentage of student responses of 67.16%. Factors that influence learning difficulties are internal factors in the form of psychological factors in the aspect of interest (65%), motivational aspects (58%), and aspects of study habits (49%). Meanwhile, external factors do not affect students' difficulties in studying Computational Physics. Further research, it is necessary to carry out a similar analysis by taking into account other factors that are thought to influence the attitudes and difficulties of students in studying Computational Physics, both internal and external factors, so that they are better in determining the next steps to overcome student difficulties in studying Computational Physics.
Kepraktisan Video Pembelajaran Kalkulus untuk Fisika dalam Proses Belajar Daring pada Masa Pandemi Covid-19 Rahmat Hidayat; Putri Dwi Sundari; Fadhila Ulfa Jhora; Hidayati Hidayati
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 5 No 1 (2021): 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/vol5-iss1/556

Abstract

Corona virus disease (covid-19) has spread all over the world and became a pandemic in short time. Indonesia is one of the countries that affected by covid-19 pandemic. Covid-19 changed everything in various area including education. Online learning became one of the solutions in universities in order to keep learning process going. Unfortunately, policy to apply online learning is facing many difficulties associated with infra-structure, student economic capability and time management. Learning video is presented to overcome difficulties of online learning during covid-19 pandemic in subject of Calculus for Physics. The video presents material supported by sample problem and solution. Practicality of the learning video was examined by collecting student`s responses in aspect of ease of use, learning time efficiency, attractiveness and benefits. Data was analyzed using percentage formula to determine criteria of practicality. The result of the observation revealed that learning video of calculus for physics has a good practicality that represented by score of each aspects of 81,26% for ease of use, 83,53% for learning time efficiency, 79,87% for attractiveness and 81,08% for benefits. Based on this result we conclude that learning video is very useful to assist student in online learning during covid-19 pandemic. Furthermore, learning video could be one of the best choices in learning media to apply digital and remote learning in facing of Industrial Revolution 4.0.
Analysis of student’s creative thinking ability in computation physics course Rizka Melia Putri; Akmam Akmam; Fatni Mufit; Silvi Yulia Sari; Rahmat Hidayat
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 8, No 2 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v8i2.13783

Abstract

Creative thinking is a crucial thing to support the development of students taking Computational Physics courses but is rarely considered, so it takes a description of students' creative thinking skills so as to provide alternative appropriate learning methods. The purpose is to determine the ability of creative thinking of college students within the Computational Physics courses. This kind of study is descriptive with a quantitative method. The studies populace is all college students taking courses of Computational Physics for the January-June 2021 semester. The studies tool is within the form of a questionnaire. The research results: Students' Creative Thinking Ability in Computational Physics Course as a whole is 65%, based on the Problem Sensitivity indicator has a direct effect value of 0.91, the Fluency indicator is 0.94, the Flexibility indicator is 0.96, the Originality indicator is 0.64, the Elaboration indicator is 0.69, and the Evaluation indicator 0.58.
ANALISIS KEBUTUHAN TERHADAP MEDIA PEMBELAJARAN BERBASIS ICT (INFORMATION AND COMMUNICATION TECHNOLOGY) Nadya Putri Herman; Hidayati Hidayati; Renol Afrizon; Rahmat Hidayat
ORBITA: Jurnal Kajian, Inovasi dan Aplikasi Pendidikan Fisika Vol 9, No 1 (2023): Mei
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/orbita.v9i1.14797

Abstract

ABSTRAKTujuan studi ini adalah mengetahui kebutuhan terhadap media pembelajaran berbasis ICT. Analisis kebutuhan dilaksanakan karena rendahnya minat belajar siswa terhadap pembelajaran fisika dan rendahnya prestasi belajar siswa dalam pelajaran fisika.  Studi dilakukan di SMA Negeri 6 Padang kelas X MIPA 3. studi ini menggunakan metode studi deskriptif kualitatif. Untuk memperoleh informasi, peneliti menyebarkan angket atau kuisoner secara langsung. Hasil studi ini menyatakan bahwa kebutuhan akan media pembelajaran berbasis ICT sangat diperlukan oleh siswa dengan persentase rata – rata 85,1% namun  sarana dan prasarana seperti akses internet terbatas menjadi hambatannya . Maka dari itu dibutuhkan media pembelajaran berbasis ICT yang bisa dipergunakan tanpa akses internet dan bisa disemua device smartphone  siswa dan guru. Media pembelajaran berbasis ICT tersebut bisa seperti bahan ajar elektronik, virtual laboratory atau game pembelajaran yang diharapkan mampu meningkatkan semangat belajar dan prestasi siswa. Kata kunci: analisis kebutuhan; media pembelajaran; ICT ABSTRACTThe purpose of this study is to determine the need for ICT-based learning media. A needs analysis was carried out because of the low interest of students in learning physics and low student achievement in physics subjects. The study was conducted at SMA Negeri 6 Padang class X MIPA 3. This study used a qualitative descriptive study method. To obtain information, researchers distribute questionnaires or questionnaires directly. The results of this study state that the need for ICT-based learning media is needed by students with an average percentage of 85.1%, but facilities and infrastructure such as limited internet access are the obstacle. Therefore, ICT-based learning media is needed which can be used without internet access and can be used on all student and teacher smartphone devices. ICT-based learning media can be electronic teaching materials, virtual laboratories, or learning games which are expected to increase student enthusiasm for learning and achievement. Keywords: need analysist; learning media; ICT
Analysis of The Optical Properties of The Synthesis of Fe3o4/Pani Nanocomposites with The Sol-Gel Method using Spin Coating Nadya Aztifa; Yenni Darvina; - Ramli; Rahmat Hidayat
PILLAR OF PHYSICS Vol 16, No 1 (2023)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/14332171074

Abstract

Research has been carried out on the analysis of the optical properties of Fe3O4/PANi nanocomposites synthesized by the sol-gel method using spin coating. The purpose of this study was to determine the crystal structure, crystal size, surface morphology, and optical properties of the Fe3O4/PANi nanocomposite thin films. One of the applications of optical properties is that it can be used as a semiconductor. In this study, the primary material used was iron sand obtained from Oyster Beach, Padang Pariaman Regency, West Sumatra. Iron sand contains a magnetite (Fe3O4) phase, which has the highest magnetic properties, and the polymer used is a type of polyaniline polymer (PANi) which has good chemical stability. Fe3O4 acts as a filler, while PANi acts as a matrix. In this study, five variations of the composition of Fe3O4 in PANi were used, namely 30%, 40%, 50%, 60%, and 70%. For the method used, namely the sol-gel method and sample testing using XRD, SEM, and UV-Vis Spectrophotometer characterization tools. The results of the XRD characterization showed that each addition of PANi into Fe3O4 did not affect the resulting crystal structure and had a crystal size below 100 nm. SEM testing revealed the presence of agglomeration and particle size at variations of 30%, 40%, 50%, 60%, and 70% were 27 µm, 53 µm, 61 µm, 84 µm, and 46 µm respectively. And the results of the UV-Vis Spectrophotometer test obtained energy gap values for variations in the composition of Fe3O4 in PANi, namely 30%, 40%, 50%, 60%, and 70%, respectively, namely 2.51 eV, 2.39 eV, 2.18 eV, 2.35 eV, and 2.30 eV. Based on the research results, it can be proven that the Fe3O4/PANi nanocomposite thin layer is a semiconductor material because it is in the range of 0-3 eV.
The Effect of The Addition of Seaweed Charcoal (Sargasum sp.) With Pure Graphite on The Absorptive Properties of Graphene Oxide Syntheses Using the Hummer Modification Method Dicko Maulana Syahdan; - Ramli; Rahmat Hidayat; Yenni Darvina
PILLAR OF PHYSICS Vol 16, No 1 (2023)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/14304171074

Abstract

Graphene Oxide or Graphene Oxide (GO) Is a graphite oxide in the form of a monolayer obtained from exfoliating graphite oxide into sheets through a sonication or stirring process. In this study, the material used was a mixture of pure graphite and seaweed (Sargasum sp). Seaweed (Sargasum sp) is used as a mixture of pure graphite because the carbon content in seaweed (Sargasum sp) is good enough to reduce the use of pure graphite as the main ingredient in making graphene oxide. There are are 4 variations of composition with the aim of seeing the best results from these five compositions, namely the composition between Graphite and Sargassum sp, namely 70%: 30%, 60% ; 40%, and 50% : 50%. The research results obtained showed that graphene oxide had been successfully synthesized from the addition of seaweed charcoal because of some of the typical properties of graphene oxide. By X-ray diffractogram at an angle of 2, it was found to contain C-O, C=O, C=C, and O-H functional groups. In the VNA test, it obtained high reflection loss and adsorption coefficient values in a mixture of 50% pure graphite: 50% seaweed with a reflection loss value of -7.40 dB and an adsorption coefficient of 0.57342
Crystal Structure Analysis of Graphene Oxide based on Bamboo “Betung” Synthesized By Modi-Fied Hummer Method Ledia Elan Safitri; Ramli; Gusnedi; Rahmat Hidayat
Journal of Climate Change Society Vol. 1 No. 1 (2023)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jccs/Vol1-iss1/10

Abstract

Bamboo is a non-timber forest product with a very large population in Indonesia. One of them is bamboo betung which can be found from the lowlands to the highlands but has not been used properly. Therefore, research was conducted to utilize bamboo betung to benefit the society. In this study, the synthesis of graphene oxide (GO) from bamboo betung stems will be carried out. The purpose of GO synthesis to further observe the crystal structure and crystal size of GO itself because it can be applied in various fields such as wave absorbers, radio frequency electronics, data display panels, and photovoltaic cells. GO synthesis was carried out using the Modified Hummers Method. The sintering temperatures used in this study were 300oC, 350oC, 400oC and 4500C. GO characterization was carried out using XRD and FTIR to reveal the system of crystal, crystal structure, and size, in addition functional groups, and phases of graphene oxide. GO has an average crystal size of 23.30165 nm as the largest average crystal size. GO layer is formed due to the bond between Carbon (C), Hydrogen (H) and Oxygen (O). GO Layer can be typed at any temperature variations carried out..
The Practicality of Applying Physics Learning Games with Scientific Literacy Poppy Julia Oxana; Hidayati; Renol Afrizon; Rahmat Hidayat
Jurnal Penelitian Pendidikan IPA Vol 9 No 7 (2023): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i7.3883

Abstract

Physics is part of the natural sciences which plays an essential role in life. Learning physics must be distinct from various learning environments to achieve the stated learning objectives. One of the things that play an essential role, in this case, is the learning media. One of the learning media that can be used is a game. Experts have validated this physics learning game with scientific literacy, but it has yet to be tested for practicality. This study aimed to determine the practicality of implementing physics learning games with scientific literacy for Padang City High School students. This type of research is descriptive, with a sample of students and teachers in six high schools in Padang City, which have been grouped into three levels high, medium, and low. The research instrument used a practical questionnaire with four answer choices. The data analysis used in this research is a descriptive analysis technique. The results showed that the convenience aspect obtained a practicality percentage of 76.76% according to students and 90.63% according to the teacher, the attractiveness aspect obtained a percentage of 79.10% according to students and 86.25% according to teachers, and the last aspect of efficiency obtained a percentage of 79. 43% according to students and 92.50% according to teachers. Overall, according to the students, this game is practical to use, with a percentage of 78.43%. According to the teacher, the game has a percentage of 90.63%, with a very practical category.
The Effect of Compositional Optical Analysis of ZnO/TiO2 Composites In a Sunscreen Product Maritza Syalsabilla; Fuad Sofaturahman; Mira Syuriyani; Lia Rifka Septiana; Nadia Raisa Aryani; Riri Jonuarti; - Ratnawulan; Rahmat Hidayat
PILLAR OF PHYSICS Vol 16, No 2 (2023)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/14929171074

Abstract

TiO2 and ZnO are active components in commercialized physical sunscreens that have a broad protective spectrum, which includes UVB and UVA. The combination of ZnO/TiO2 composites has more effective performance in blocking Ultra Violet rays in a wide wavelength range compared to ZnO or TiO2 alone. However, the high refractive index of TiO2 can cause a white cast. To solve the issue, a cream was created by incorporating antioxidants such as Virgin Coconut Oil (VCO). The purpose of this study is to determine the effect of the ZnO/TiO2 composite optical composition on visible and ultra violet light. Three composition comparisons were investigated in the study: ZnO/TiO2 10% added VCO, ZnO/TiO2 5% added VCO, and ZnO/TiO2 5% without VCO. UV-vis spectroscopy characterization showed that the ZnO/TiO2 composite absorbed more effectively in the ultra violet range than in visible light, and the greatest absorption and maximum reflectance are in the UVA1 range. The higher the concentration of ZnO/TiO2 in the cream composition, the higher the cream's absorption and reflection peaks. The reflectance in the visible light region is low, between 30% and 40%, implying that visible light passes through the sunscreen cream 70% to 80% of the time. As a result, the higher the ultra violet reflectance of the physical sunscreen cream, the lower the transparency. The higher the concentration of ZnO/TiO2, the greater the band gap value of the physical sunscreen, in the range of 3.1–3.5 eV
Making of Biodegradable Plastic Based on Corn Starch (Amylum Maydis) with Addition of Acid (CH3 COOh) and Gliserol Plasticizer Desti Yuspita Sari; - Ratnawulan; Riri Jonuarti; Rahmat Hidayat
PILLAR OF PHYSICS Vol 16, No 2 (2023)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/15040171074

Abstract

Almost all countries face the problem of plastic waste due to the large production of conventional plastics and the long degradation process. Therefore, to protect nature from the accumulation of plastic waste, research on biodegradable plastics needs to be done. Biodegradable plastics are made from starch, cellulose, chitosan, and proteins extracted from renewable biomass. Starch for making biodegradable plastics can be obtained from plants, one of which is corn. This study aims to determine the effect of the composition of acetic acid, glycerol and corn starch on the quality of biodegradable plastics which include tensile strength, elongation and biodegradation. The independent variables were variations of acetic acid and glycerol. Control variables are plastic mold size, corn starch mass of 5 grams, other compounds outside the independent variables. The dependent variable is tensile strength, elongation and biodegradation. To test the tensile strength and elongation of biodegradable plastic, Ultimate Testing Machine Mini was used. The results showed that the addition of acetic acid and glycerol to the corn starch and glycerol blending material had an effect on increasing the tensile strength value and reducing the elongation and biodegradation values of biodegradable plastics. The highest tensile strength value is 50.04 Mpa, obtained from the addition of 1.44% acetic acid and 35.71% glycerol from a volume of distilled water of 70 ml. The highest length gain or elongation of 90% was obtained from the addition of 0.48% acetic acid and glycerol as much as 21.43% of the 70 ml volume of distilled water. Percent weight loss of the largest plastic obtained from the addition of acetic acid as much as 0.48% and glycerol as much as 21.43% of the volume of distilled water as much as 70 ml, which amounted to 93.33%. 
Co-Authors - Ramli Defrizal Saputra Desti Yuspita Sari Dicko Maulana Syahdan Fadhila Ulfa Jhora Fatni Mufit Fuad Sofaturahman Gusnedi Hidayati Hidayati Hidayati Ledia Elan Safitri Lia Rifka Septiana Mairizwan Mairizwan Maritza Syalsabilla Mira Syuriyani Nadia Raisa Aryani Nadya Aztifa Nadya Putri Herman Poppy Julia Oxana Putri Dwi Sundari Ramli Ramli Ramli Ratnawulan . Renol Afrizon Revi Indriani Riri Jonuarti Rizka Melia Putri RR. Ella Evrita Hestiandari Silvi Yulia Sari Solly Aryza Wahyuni Satria Dewi Yenni Darvina