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All Journal Transformasi: Jurnal Pengabdian Masyarakat Jurnal Penelitian Pendidikan IPA (JPPIPA) Momentum: Physics Education Journal JURNAL EKSAKTA PENDIDIKAN (JEP) JURNAL PENDIDIKAN TAMBUSAI Jurnal Ilmiah Profesi Pendidikan Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika Phydagogic : Jurnal Fisika dan Pembelajarannya Journal of Innovative Physics Teaching (JIPT) Physics Learning and Education Journal of Civil Engineering and Vocational Education Journal of Experimental and Applied Physics Inventa: Journal of Science, Technology, and Innovation Jurnal Penelitian Pembelajaran Fisika
Fadhila Ulfa Jhora
Department Of Physics, Universitas Negeri Padang
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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Enhancing student comprehension of crystal structures: The effectiveness of Vesta as a learning tool Nadiyyah, Khoirotun; Aprianti, Rika; Zakirman, Zakirman; Widiasih, Widiasih; Jhora, Fadhila Ulfa; Ratnawulan, Ratnawulan
Momentum: Physics Education Journal Vol. 9 No. 1 (2025)
Publisher : Universitas PGRI Kanjuruhan Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21067/mpej.v9i1.10448

Abstract

The advancement of technology in education was evident in the development of digital-based learning media. It was expected to serve as a stimulus in transforming knowledge for students, particularly in abstract subjects such as crystal structures. Understanding crystal structures was crucial for studying the physical properties of materials, making it important for students to enhance their comprehension. The research objective was to determine the effectiveness of using Vesta software as a learning media to enhance students' understanding of crystal structures by employing standardized assessment instruments. This research was conducted using a quantitative approach focused on collecting numerical data and statistical analysis through an experimental method involving two groups of students taking a solid-state physics course. The research design involved a control and an experimental group. Both groups were given the same subject but using different learning media. The instrument used was a multiple-choice test that had been rigorously validated through validity, reliability, difficulty level, and discrimination index. Effectiveness was evaluated using independent sample t-test analysis with the aid of SPSS software. Instrument testing data revealed that out of 40 developed questions, 20 met the standards to be used as instruments. The results indicated a highly significant enhancement in students' understanding of crystal structures after using the Vesta software as a learning media, as represented by a sig. (2-tailed) value of 0.000. The findings indicate that Vesta can be integrated into science teaching. Further research can test the effectiveness of implementing Vesta in distance learning.
Analisis Sifat Penyerap Gelombang Mikro Nanokomposit Fe3O4/Karbon Aktif Dari Limbah Tongkol Jagung Putri, Ulfa Haldiani; Jhora, Fadhila Ulfa; Dwiridal, Letmi; Hidayat, Rahmat
Jurnal Pendidikan Tambusai Vol. 9 No. 1 (2025)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i1.25298

Abstract

Upaya yang dapat dilakukan untuk mengurangi limbah tersebut adalah dengan memanfaatkannya menjadi karbon aktif yang dapat diaplikasikan sebagai material penyerap radar (RAM). Tujuan dari penelitian ini adalah untuk menganalisis sifat penyerap gelombang mikro nanokomposit Fe3O4/karbon aktif dari limbah tongkol jagung. Jenis penelitian adalah penelitian eksperimen. Variabel bebas dari penelitian ini adalah komposisi Fe3O4 dan karbon aktif tongkol jagung. Waktu dan suhu dari pemanasan oven dan furnace, NaOH, etanol, massa karbon dan waktu sintesis dengan HEM sebagai variable kontrol. Sifat penyerap gelombang mikro nanokomposit Fe3O4/karbon aktif tongkol jagung sebagai variabel terikat. Hasil uji XRD menunjukkan bahwa setiap variasi memiliki fasa carbon dan iron oxide, dan struktur Kristal berbentuk cubic, hexagonal, dan orthorhombic. Hasil pengujian FTIR menunjukkan gugus fungsi C-H, C=C, dan C-O, gugus fungsi karbon (C) mengandung oksigen yang menunjukkan bahwa karbon tersebut adalah karbon aktif. Hasil uji VNA menunjukkan nilai reflection loss dari nanokomposit Fe3O4/karbon aktif.
Evaluasi Data Hujan Periodik terhadap Potensi Bencana Banjir Berulang di Kota Padang Bana, Vrielsha; Sudiar, Nofi Yendri; Amir, Harman; Jhora, Fadhila Ulfa
Jurnal Pendidikan Tambusai Vol. 9 No. 1 (2025)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i1.25586

Abstract

Penelitian ini menyelidiki faktor-faktor yang mempengaruhi curah hujan periodik dan potensi bencana banjir berulang di Kota Padang. Penelitian ini mengaplikasikan teknik analitik untuk memahami karakteristik data curah hujan periodik dan korelasinya dengan kejadian frekuensi banjir. Faktor-faktor yang mempengaruhi curah hujan periodik, seperti kondisi peta standar cuaca dan pola geografis, diperiksa untuk memberikan wawasan tentang hubungan antara intensitas curah hujan periodik dan frekuensi kejadian banjir. Studi ini menerapkan analisis deskriptif untuk merangkum data karakteristik curah hujan periodik, analisis spasial untuk mengevaluasi distribusi curah hujan periodik, dan analisis korelasi dilakukan untuk mengeksplorasi hubungan antara variabel independen dan dependen yang terkait dengan curah hujan periodik dan banjir. Temuan ini bertujuan untuk berkontribusi pada strategi manajemen bencana dan perencanaan di Kota Padang, serta meningkatkan ketahanan kota terhadap peristiwa banjir.
Pengembangan Bahan Ajar Digital Suhu dan Kalor Berbasis Model PBL Berbantuan Flip Pdf Professional untuk Siswa Fase F SMAN 7 Padang Ilahiyah, Fitratul; Darvina, Yenni; Ratnawulan, Ratnawulan; Ulfa Jhora, Fadhila
Jurnal Ilmiah Profesi Pendidikan Vol. 10 No. 1 (2025): Februari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jipp.v10i1.3097

Abstract

SMAN 7 Padang telah memiliki berbagai bahan ajar, termasuk bahan ajar digital yang dikembangkan oleh guru untuk proses pembelajaran. Namun, belum ada bahan ajar digital yang berbasis model PBL. Terdapat peluang untuk meningkatkan kualitas pembelajaran dengan bahan ajar berbasis teknologi yang menarik, guna meningkatkan minat, motivasi, dan gaya belajar siswa dalam Fisika. Flip PDF Profesional merupakan software untuk mengonversi materi dalam format file PDF menjadi bentuk buku elektronik (e-book) yang dapat ditambahkan gambar/ilustrasi, animasi, dan video yang menarik. Dalam penelitian yang akan dikembangkan oleh peneliti yaitu pengembangan Bahan Ajar Digital Suhu dan Kalor Berbasis Model PBL berbantuan Flip Pdf Profesional Untuk Siswa Fase-F Pada E-learning SMAN 7 Padang. Jenis penelitian yang digunakan peneliti adalah penelitian dan pengembangan atau yang disebut istilah Research Development (R&D), menggunakan skala Aiken dalam mengolah data. Kesimpulan penelitian yaitu Bahan Ajar Digital Suhu dan kalor berbasis model PBL berbantuan flip pdf professional  untuk siswa fase F telah diperoleh produk yang valid dan layak digunakan setelah melakukan evaluasi oleh ahli dengan rata-rata nilai validitas sebesar 0,85. Hasil pengujian praktikalitas dari produk bahan ajar digital suhu dan kalor berbasis model model PBL berbantuan flip pdf professional untuk siswa fase F telah didapatkan produk yang praktis dan dapat digunakan dalam pembelajaran Fisika. Hal ini dibuktikkan dari penilaian praktikalitas yang diberikan kepada guru dengan rata-rata persentase sebesar 98,9% kategori sangat praktis, kemudian disebarkan kepada satu kelas di kelas XI dengan rata-rata persentase sebesar 88,7% berada dalam kategori sangat praktis.
Analysis of Optical Properties of Graphene Oxide from Bamboo Petung (Dendrocalamus Asper) Synthesized by Modified Hummer Method Indah Safira; Ramli; Yenni Darvina; Fadhila Ulfa Jhora
Journal of Experimental and Applied Physics Vol 1 No 2 (2023): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i2.20

Abstract

Carbon, hydrogen and oxygen are abundant in the structure of graphene oxide (GO), often known as graphene. In this study, petung bamboo was used in the manufacture of graphene oxide. The aim of this research is to find out how the sintering temperature influences the ability of graphene oxide to absorb waves. The modified hummer method is used to oxidize graphite and produce Graphene Oxide. This research was divided into several parts, namely burning carbonized petung bamboo, production of graphene oxide, and sonication and neutralization of graphene oxide using sintering temperatures of 300°C, 350°C, 400°C and 450°C. The synthesis results were characterized using a UV-Vis spectrometer to obtain an absorption spectrum resulting in a band gap of 2.68 eV-4.38 eV in Petung bamboo at a sintering temperature of 300oC - 400oC, the bandgap increasing as the sintering temperature increased. At a sintering temperature of 400oC - 450oC the band gap value decreases which is influenced by the results of cell changes from refinement which can change the band structure thereby affecting the size of the band gap. The absorption value obtained in the optical properties decreases because the high sintering temperature causes the reaction rate to become faster so that the absorption value becomes lower.
Determination of Thermal Conductivity and Porosity of Composite Panels from Fibers, Bagasse Powder and Polypropylene (PP) Plastic Waste Azca Aryadiva Mahengga; Yenni Darvina; Ramli Ramli; Fadhila Ulfha Jhora
Journal of Experimental and Applied Physics Vol 1 No 3 (2023): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i3.36

Abstract

Global warming causes temperatures on the earth's surface to increase. High temperatures during the day will make the temperature in the room of the residential house increase. The impact will affect the warmth of residents. One of the causes of the increase in indoor temperature is due to the absorption of solar heat by the components of the walls and roof. One alternative that can be done is the manufacture of composite panels that act as heat insulators using bagasse fibers, bagasse powder and the matrix of polypropylene plastic waste with low thermal conductivity, and high porosity. The composition of the composite varies the percentage of fibers and powders with a fixed percentage of polypropylene plastic waste of 90%. The percentage variation of polypropylene plastic waste of bagasse fiber and powder used is 100%:0%:0%, 90%:10%:0%, 90%:8%:2%, 90%:6%:4%, 90%:4%:6%, 90%:2%:8%, and 90%:0%:10%. Based on the test results, successive thermal conductivity values were 0.226715 W/moC, 0.16241 W/moC, 0.13543 W/moC, 0.09582 W/moC, 0.11457 W/moC, 0.15351 W/moC, 0.18276 W/moC. The porosity values of successive samples were 0.63116%, 2.84024%, 3.36151%, 3.85179%, 3.24880%, 3.09383%, 2.65145%. From the test results, it was obtained that variation 4 had the highest thermal conductivity value with a value of 0.09582 W / moC. while the highest porosity value was obtained in variation 4 with a value of 3.85179%. Composite panels with a variation of 4, and a variation of 5 are optimum variations that can be used as a good heat insulation material.
Effect of Polyvinyl Alcohol (PVA) Concentration and Stirring Time on The Mechanical Properties of Biodegradable Plastic from Kepok Banana Peel Starch Doni, Monica Anatasya; Jonuarti, Riri; Wulan, Ratna; Jhora, Fadhila Ulfa
CIVED Vol. 10 No. 3 (2023): September 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i3.499

Abstract

One solution is to use bioplastics, which can replace synthetic plastics that are difficult to decompose. Starch is one of the materials used in the manufacture of bioplastics because it is naturally degradable. However, bioplastics made from starch tend to be brittle and easily damaged, so additional materials are needed to overcome this problem. Polyvinyl alcohol (PVA) is one of the materials used in the manufacture of bioplastics because it has properties that can be degraded naturally, is non-toxic, and is able to form good quality plastic films. This study aims to examine the effect of PVA concentration and stirring time on the mechanical properties of biodegradable plastic derived from kepok banana peels. This study used a completely randomized design with three variations of PVA concentration (3%, 4%, and 5%) and three variations of stirring time (25 minutes, 35 minutes, and 45 minutes). The results showed that at a PVA concentration of 5% with a stirring time of 45 minutes, bioplastics showed the best quality with a tensile strength value of 2.25 MPa, the best elongation at break was 416%, and the best elasticity was 0.541. In biodegradation, all samples were completely degraded within 7 days. It can be included that the addition of PVA concentration and the length of stirring effecth the mechanical properties of bioplastics but not on the biodegradation test.
Analysis of the Influence Mass Variations of Banana STEM Fibres with Polypropylene (PP) Matrix on Accoustic and Porosity Properties Santika, Viera Alvio; Darvina, Yenni; Ratnawulan, Ratnawulan; Jhora, Fadhila Ulfa
Journal of Experimental and Applied Physics Vol 2 No 2 (2024): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i2.54

Abstract

Noise pollution is sound that you do not want to hear or is known as noise. If people hears loud noises continuously, it can disrupt hearing function. Therefore, it is necessary to have noise control by making an acoustic material that will be coated on the room's walls. A cheap and environmentally friendly alternative material is using banana stem waste from the fibre taken and with polypropylene as a fibre binder. This research aims to determine the effect of variations in the mass composition of banana stem fibre with the matrix polypropylene on the value of the acoustic properties and porosity, and determine the relationship between porosity with acoustic properties. Characteristics of the acoustics that will be measured are sound absorption coefficient, sound reflection coefficient, and transmission loss. The method used is using a characterizaton tool with one microphone impedance tube and porosity test tool with a digital scale. Acoustic material is made by varying the mass percentage in the ratio of polypropylene and midrib fibre banana, namely 90%:10%; 85%:15%; 80%:20%; 75%:25%; and 70%:30%. Based on the research results, it is known that the more fibre composition in the composite, the sound absorption coefficient values, transmission loss values, and porosity values were higher produced, but the resulting sound reflection coefficient value was lower. Then, the relationship between porosity with acoustic properties was that the higher porosity value, the resulting sound absorption coefficient and transmission loss value are higher too. However, the resulting sound reflection coefficient value was getting lower.
Effect of The Camposition Nanocomposite Fe3O4-Graphene Oxide on Optical Properties Synthesized from Coconut Shell Charcoal Angraini, Sri; Gusnedi, Gusnedi; Jonuarti, Riri; Jhora, Fadhila Ulfa
Journal of Experimental and Applied Physics Vol 2 No 2 (2024): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i2.60

Abstract

This study aims to determine the effect of Fe3O4 nanocomposite composition: Graphene Oxide on the optical properties of Fe3O4 Graphene Oxide nanocomposite by obtaining the results of absorbance value, transmittance, reflectance, and band gap value based on UV-Vis test. Graphene oxide used in this study is made from biomass waste coconut shell charcoal which contains carbon elements, most of whose pores are still covered by hydrocarbons and other organic compounds and the charcoal is used as activated carbon through an activation process, then synthesized using the modified hummers method. In this study, three variations were used, namely 20%: 80%; 30%; 70%; 40%: The results show that the effect of Fe3O4-Graphene Oxide Nanocomposite Composition on coconut shell waste using a UV-Vis spectrometer, the absorbance value of each sample was obtained in the range of 200-290 nm.. In the results of gap energy research with 3 variations respectively 3.269 eV, 3.79 eV, 3.91 eV obtained that if the variation of graphene oxide is higher than the value of the energy gap produced is smaller, so the addition of graphene oxide from coconut shell waste has the effect of reducing the energy gap of graphene oxide.
Analisis Struktur Mikro Nanokomposit Fe3O4/Karbon Aktif dari Limbah Tongkol Jagung Farras Drasih, Nabilah; Ulfa Jhora, Fadhila; Dwiridal, Letmi; Hidayat, Rahmat
Jurnal Pendidikan Tambusai Vol. 8 No. 2 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Alternatif untuk mengurangi limbah tongkol jagung adalah dengan memanfaatkan karbon tongkol jagung sebagai bahan anoda pengganti baterai lithium-ion. Tujuan penelitian ini adalah untuk menganalisis struktur mikro nanokomposit Fe3O4/karbon aktif. Jenis penelitian adalah penelitian eksperimen dengan perbedaan komposisi antara Fe3O4 dan karbon aktif tongkol jagung sebagai variabel bebas. Waktu dan suhu oven, waktu dan suhu furnace, NaOH, etanol, massa karbon dan waktu sintesis dengan HEM sebagai variabel kontrol. Struktur mikro nanokomposit Fe3O4/karbon aktif tongkol jagung sebagai variable terikatnya. Nilai Hasil uji XRD menunjukkan setiap varian memiliki fasa carbon dan iron oxide, serta bentuk kristal cubic, hexagonal, dan orthorhombik. Hasil uji FTIR menghasilkan gugus fungsi tersebut adalah C-H, C=C, dan C-O, sehingga gugus fungsi karbon (C) mengandung oksigen (O) yang menunjukkan bahwa karbon tersebut aktif. Hasil uji SEM pada ketiga variasi menunjukkan rata-rata ukuran partikel kurang dari seratus nanometer. Hal ini membuktikan bahwa karbon aktif tongkol jagung bersifat nanometrik.
Co-Authors - Ramli Akmam Akmam Angraini, Sri Aprianti, Rika Asrizal Azca Aryadiva Mahengga Bana, Vrielsha Cahyaningrum, Wahyu Dea Stivani Suherman Dea Stivani Suherman Dea Stivani Suherman Defrizal Saputra Doni, Monica Anatasya Fanny Rahmatina Rahim Farras Drasih, Nabilah Fitratul Ilahiyah Fitri Endriyani Fourier Dzar Eljabbar Latief Freddy Haryanto Gina Fadilah NST Gusnedi Gusnedi Gusnedi, - Harman Amir Hidayati Hidayati Ilahi, Fitratul Indah Safira Irfan Ananda Ismail Leni Aziyus Fitri Letmi Dwiridal M Ilham M Ilham M Ilham Munadia Insani Nadia Ardianti Nadiyyah, Khoirotun Nofi Yendri Sudiar Putri Dwi Sundari Putri, Ulfa Haldiani Qadriati Qadriati Rahmat Hidayat Rahmat Hidayat Ramli Ramli Ramli Ramli Ramli Ratna Wulan Ratnawulan . Ratnawulan Ratnawulan Ratnawulan Ratnawulan Raysa, Afrila Riri Jonuarti Santika, Viera Alvio Septia, Zahwa Silvi Yulia Sari Sri Aulia, Ruqayah Stivani Suherman, Dea Wahyuni Satria Dewi Widiasih, Widiasih Yenni Darvina Yohandri Bow Yuliana, Yuli Yulifarma, Rika Yuliza Noerman, Kiki Yurnetti, Yurnetti Zakirman