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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Riset dan Kajian Pendidikan Fisika Jurnal Pendidikan Fisika Indonesia JURNAL FISIKA Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran Emitor: Jurnal Teknik Elektro Journal of Natural Sciences and Mathematics Research Edufisika: Jurnal Pendidikan Fisika JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Jurnal Penelitian Sains JOURNAL OF INFORMATICS AND TELECOMMUNICATION ENGINEERING EnviroScienteae JRST (Jurnal Riset Sains dan Teknologi) Jurnal Pengelolaan Laboratorium Pendidikan Jurnal Pendidikan Matematika (JUDIKA EDUCATION) Jurnal Pendidikan Fisika dan Teknologi UPEJ Unnes Physics Education Journal Jurnal Fisika : Fisika Sains dan Aplikasinya Jurnal Teori dan Aplikasi Fisika Jurnal Inovasi Teknik Kimia Physics Education Research Journal Jurnal Penelitian Fisika dan Terapannya (JUPITER) Physics Communication Indonesian Journal of Environment and Disaster JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Jurnal Fisika UPEJ : Unnes Physics Education Journal Indonesian Journal of Mathematics and Natural Sciences
Upik Nurbaiti
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Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

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PEMODELAN FAKTOR KEAMANAN LERENG BERBASIS CURAH HUJAN DAN KEMIRINGAN LERENG DI KECAMATAN SUMEDANG SELATAN Nugraha, Abdurrohman; Upik Nurbaiti; Tri Sri Noor Asih
Indonesian Journal of Environment and Disaster Vol. 4 No. 2 (2025): Indonesian Journal of Environment and Disaster
Publisher : Disaster Research Center, Universitas Sebelas Maret, Surakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ijed.v4i2.2473

Abstract

Sumedang Selatan Subdistrict is one of the subdistricts in Sumedang Regency, West Java, which has had many landslide incidents. This is the main reason for the need for landslide disaster mitigation. The first step in landslide disaster mitigation is mathematical modeling as an early warning system. This study aims to model the mathematical equation for the slope safety factor (FK) in Sumedang Selatan Subdistrict based on rainfall data and slope inclination. The mathematical equation used is the Bowles 1996 slope safety factor (FK) equation. The data used are daily rainfall data from 2024 and slope inclination data (DEMNAS) from 2021. The results obtained are graphs of rainfall (P) and slope inclination (θ) against the slope safety factor (FK). The critical point was identified at a daily rainfall of 110 mm and a slope inclination 35°. Rainfall and slope inclination have a negative correlation with the slope safety factor.
Pengembangan Bahan Ajar Berbasis STEM (Science, Technology, Engineering, and Mathematics) Berbantuan Augmented Reality untuk Meningkatkan Pemahaman Konsep Nikmaturroby, Puji; Nurbaiti, Upik
Unnes Physics Education Journal Vol. 13 No. 2 (2024)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/upej.v13i2.15248

Abstract

Penelitian ini dilakukan dengan tujuan untuk mengetahui tingkat kelayakan bahan ajar berbasis STEM berbantuan Augmented Reality yang dikembangkan, mengetahui efektivitas penggunaan bahan ajar yang dikembangkat terhadap peningkatan pemahaman konsep peserta didik, serta mengetahui respon peserta didik terhadap bahan ajar tersebut. Penelitian ini menggunakan metode R&D dengan desain penelitian ADDIE. Hasil uji kelayakan dari kedua validasi ahli terhadap bahan ajar yang dikembangkan mendapatkan skor 90,27% dengan kategori sangat layak, sehingga bahan ajar dapat digunakan dalam pembelajaran. Perubahan kemampuan pemahaman konsep diukur dengan uji t dengan nilai sig. (2-tailed) yang didapatkan sebesar 0,000 yang menunjukkan bahwa sig. < 0,05, hasil analisis data tersebut dapat dikatakan bahwa terdapat perbedaan yang signifikan antara nilai pretest dan posttest dari kelas eksperimen dan kelas kontrol, kemudian keefektifan penggunaan bahan ajar diuji menggunakan uji n-gain dengan hasil kelas eksperimen sebesar 0,49 dan kelas kontrol didapatkan hasil sebesar 0,37, kedua kelas tersebut tergolong dalam kategori sedang dengan skor kelas eksperimen lebih besar dibandingkan kelas kontrol, sehingga dapat dikatakan bahwa kelas eksperimen mengalami peningkatan nilai lebih besar dibandingkan kelas kontrol. Berdasarkan hasil tersebut dapat disimpulkan bahwa penggunaan bahan ajar berbasis STEM dengan bantuan teknologi Augmented Reality efektif digunakan untuk meningkatkan pemahaman konsep peserta didik pada materi fluida statis. Hasil respon peserta didik terhadap bahan ajar tersebut didapatkan nilai rata-rata persentase sebesar 86,43% termasuk dalam kategori sangat baik.
Synthesis and Characterization of Wall Paint Based on Red Beetroot Betacyanin Pigment with Maceration Randa, Dendy; Nurbaiti, Upik; Fianti; Astuti, Budi; Yulianto, Agus
Jurnal Fisika Vol. 15 No. 1 (2025): Jurnal Fisika 15 (1) 2025
Publisher : Universitas Negeri Semarang

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Abstract

Every year, the paint industry in Indonesia continues to grow. This is due to the growth of the property and housing sectors, which increases the demand for paint nationwide. This research aims to develop environmentally friendly wall paint using betacyanin pigment from red beet tubers through a maceration process as an alternative paint color that is sustainable and beneficial for health and the environment. Betacyanin pigment extraction was carried out using the maceration method with 96% ethanol for 48 hours, then filtered using filter paper and evaporated. Binder and pigment are mixed in a ratio of 14.3:2, 14.3:5, 14.3:8, 14.3:11, 14.3:14, and 14.3:17 until homogeneous. Paint characterization is done through pH, color, density, and adhesion tests. The research results show that the sixth paint variation, with a binder and pigment composition ratio of 14.3 ml:17 ml, provides the most optimal results that closely align with SNI. The paint has a deep red color, pH 7.6, density of 1.18 g/cm³, and adhesion of 100%.
Eyeliner Fabrication from Coconut Shell Waste (Cocos Nucifera) with Xanthan Gum Binder (C35H49O29) Senda, Tamara Rizky; Nurbaiti, Upik; Fianti; Astuti, Budi; Yulianto, Agus
Jurnal Fisika Vol. 15 No. 1 (2025): Jurnal Fisika 15 (1) 2025
Publisher : Universitas Negeri Semarang

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Abstract

Eyeliner is a decorative cosmetic or make-up product. Eyeliner functions to help emphasize and make the shape of the eyes more prominent and more expressive, make makeup more dramatic without doing many steps, and cover the false eyelash line that sticks to the eyes. This study aims to determine whether activated carbon from coconut shell waste can be used as a natural dye in eyeliner fabrication. This research uses a laboratory experiment method, namely by mixing materials consisting of distilled water, xanthan gum, tween 80, propylene glycol, methylparaben, CH_3 COOH solution with distilled water, ethanol, and carbon pigments in it. Xanthan gum and carbon are mixed in a ratio of 1:10; 1:12; 1:14; 1:16; 1:8; and 1:20 until homogeneous.  Fabrication properties were tested, namely homogeneity, pH, drying time, and color tests on eyeliner fabrication. the results were analyzed descriptively. Based on the results obtained, the six fabricated formulations have a deep black color and have an average particle size of 8.1 µm, have an average pH of 6.3, an average drying time of 303 seconds, the six formulations have an evil Minister color, After Dark, Deep Forest chocolate, Holy Crow, Smoked black coffee, Indigo brown ink. It was concluded that pigments from coconut shell carbon can be used as natural dyes in eyeliner fabrication. However, in the physical properties test, namely the homogeneity test and dry time test for eyeliner fabrication, there are still discrepancies in the literature.
Studi Karakteristik Gelombang di Perairan Selat Makassar Menggunakan Model Numerik Spektrum Gelombang Resolusi Tinggi Oktauvan Damyanto, Puguh Dwi; Adiprabowo, Samuel Radityo; Alfahmi, Furqon; Putra, Ngurah Made Darma; Nurbaiti, Upik; Yulianti, Ian
Jurnal Pendidikan Matematika : Judika Education Vol. 8 No. 5 (2025): Jurnal Pendidikan Matematika:Judika Education
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/g72mme18

Abstract

Penelitian ini bertujuan untuk menganalisis karakteristik gelombang dan swell di Selat Makassar selama tahun 2021 menggunakan model numerik SWAN beresolusi tinggi. Data angin dari GFS dan kondisi batas dari BMKG digunakan untuk simulasi gelombang signifikan, dengan resolusi spasial 0,01°. Hasil simulasi dianalisis secara deskriptif kuantitatif untuk memahami pola spasial dan temporal gelombang. Penelitian ini menunjukkan bahwa dinamika gelombang di Selat Makassar dipengaruhi oleh monsun barat laut dan tenggara, dengan tinggi gelombang signifikan rata-rata dalam kategori rendah (0,5–1,25 meter) selama musim barat laut, dan rendah hingga sedang (0,5–2,5 meter) selama musim tenggara. Arah swell mencerminkan pola monsun dengan kategori dominan tenang (0,1–0,5 meter). Korelasi positif antara kecepatan angin dan tinggi gelombang (koefisien korelasi 0,36) menunjukkan kontribusi angin terhadap pembentukan gelombang, meskipun faktor lain seperti arus laut turut memengaruhi. Hasil penelitian menunjukkan bahwa pola angin, gelombang signifikan, dan swell di Selat Makassar tahun 2021 dipengaruhi oleh dinamika monsun barat laut dan tenggara. Monsun barat laut menghasilkan angin lemah hingga sedang (2–15 knot) dengan gelombang rendah (0,5–1,25 m), sedangkan monsun tenggara menghasilkan angin lebih kuat dengan gelombang rendah hingga sedang (0,5–2,5 m). Swell didominasi kategori tenang (0,1–0,5 m) sepanjang tahun, mengikuti perubahan arah monsun. Simpulan, korelasi antara kecepatan angin dan tinggi gelombang menunjukkan hubungan lemah (r = 0,36), menandakan adanya pengaruh faktor lain seperti arus laut dan swell regional.   Kata Kunci: Gelombang Signifikan, Selat Makassar, Swell, SWAN, Monsun.
Utilization of Magrove Muds In the Kuala Langsa as A Source of Electricity Meutia, Eva; Nurbaiti, Upik; Yulianto, Agus
Physics Education Research Journal Vol. 7 No. 1 (2025)
Publisher : Faculty of Science and Education, UIN Walisongo Semarang

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Abstract

The economic potential of mangroves can be a provider of economic resources, preserving the ecological environment and providing environmental services. Mangrove soil in Kuala Langsa is important to study as the potential for carbon sequestration in the form of biomass, the social potential of the community in supporting the development of efforts. The purpose of this study was to determine how much electricity was generated by the Kuala Langsa mangrove mud soil and how the effect of variations in electrode material on the electricity produced by the Langsa mangrove mud soil. The method used is to use a series of voltaic cells. The results of this study obtained data that mangrove mud soil can be used as alternative energy by using variations of Cu-Zn and Cu-Al electrode pairs with a mangrove mud mass of 350 ml, at Cu-Zn electrode pairs the largest electric power obtained is 0,8736 J/s. with the lamp on while the Cu-Al electrode pair obtained an electric power of 0,1794 J/s with the lamp not lit
Potential of local material SiO2 water Hyacinth for semiconductor materials Hidayat, Sony; Ahmad Ziyan Nafis; Muhammad Noorman Perdana; Upik Nurbaiti
Journal of Natural Sciences and Mathematics Research Vol. 11 No. 2 (2025): December
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.v11i2.27406

Abstract

This study aims to examine the potential of local SiO₂ material synthesized from water hyacinth biomass waste as a candidate for semiconductor materials. Synthesis was carried out through a calcination process at temperatures above 600 °C to remove cellulose, lignin, and other impurities. Material characterization was carried out using UV-Vis spectroscopy, X-ray Diffraction (XRD), and Raman Spectroscopy. The results of UV-Vis spectroscopy showed that the water hyacinth derived SiO₂ exhibited an unusually reduced optical band gap of approximately 2.3 eV, likely influenced by impurity phases.. XRD tests indicated the presence of two crystal phases, namely the trigonal structure of SiO₂ and the monoclinic structure of the CaH₁₂O₁₇Si₂U₂ compound. Raman analysis confirmed the presence of functional groups such as Si, amorphous SiO2, CH₂/CH₃ and vibration signals from irregular sp² carbon. This combination of structures is thought to cause a lower band gap value compared to pure SiO₂. This finding indicates that SiO₂ from water hyacinth has potential as an intermediate semiconductor material, although further purification is still needed to increase the purity of the SiO₂ phase.
Co-Authors Adhitya Agung Pribadi Adina Widi Astuti Adiprabowo, Samuel Radityo Agus Yulianto Agus Yulianto Ahmad Minanur Rohim Ahmad Ziyan Nafis Alfahmi, Furqon Allif Silfiyana Rohman Allif Silfiyana Rohman Anisa Furtakhul Janah Arofah, Sitta Khusniati Aulia Rahma Azizah Billy Cessar Bimara Budi Astuti Dewi, Anggita Kharisma Didik Aryanto Dwi Indah Lestari DWI YULIANTI Ellianawati, Ellianawati Etik Irawati Eva Meutia Fariyani, Fariyani Febriani, Marosyana Ayu Fianti Fianti Fianti Fianti Fianti Fianti Fianti Fianti Fianti Fianti Fianti Fianti Fianti Fianti Fianti, Fianti Gita Ayu Permatasari H, S.S. Dewanti Hermawan, Mohamad Arif Hidayat, Sony Ian Yulianti IAN YULIANTI Ian Yulianti, Ian Ika Vidiasari Aristawati Ika Vidiasari Aristawati Iqbal Khoiru Ainin Nisa Khumaedi - Laily Nur Azizah Lubis, Mutia Hariza Meutia, Eva Mohamad Arif Hermawan Mugi Lestari Muhammad Noorman Perdana Mutia Hariza Lubis Mutia Hariza Lubis Muttaqin, Rodhotul Nafiusokhib Naila Hilmiyana Syifa Natalia Erna Setyaningsih Nikmaturroby, Puji Nugraha, Abdurrohman Oktauvan Damyanto, Puguh Dwi Permatasari, Gita Ayu Prayitno, Wasi Sakti Wiwit Putra, Ngurah Made Darma Putut Marwoto Randa, Dendy Rodhotul Muttaqin Rohim, Ahmad Minanur Rohman, Allif Silfiyana Senda, Tamara Rizky Setyaningsih, Natalia Erna Siti Wahyuni Sugianto Sugianto SUNARNO Sutikno Madnasri Sutikno Sutikno Swastika Ramadhanty Eka Putri Tri Anita Wulansari Tri Sri Noor Asih Utomo, Galih Ridho Utomo Yeni Rima Liana Yulita Nurbaiti Zayyinul Mushthofa