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All Journal Journal of Natural Sciences and Mathematics Research Al-MARSHAD: Jurnal Astronomi Islam dan Ilmu-Ilmu Berkaitan AMMA : Jurnal Pengabdian Masyarakat
Muztaba, Robiatul
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Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Education Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Nursing Physics

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Penyuluhan Tentang Pengiklanan Dan Pengemasan Produk Kewirausahaan Dalam Rangka Pencegahan Stunting Maulidia Rahayyu, Annisa; Pratama, Alvin; Muztaba, Robiatul; Nur Rohman, Tefur
AMMA : Jurnal Pengabdian Masyarakat Vol. 4 No. 6 : Juli (2025): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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

Abstract

Stunting is a serious health problem that has a long-term impact on the quality of human resources, especially in rural areas. This community service aims to increase the understanding of PKK and Posyandu cadres about stunting prevention through advertising and packaging education about simple nutritious food processing made from local ingredients. The method used is interactive socialization. This activity was carried out on December 18, 2024 in Bumisari Village, Natar District, South Lampung Regency. The results of the activity showed an increase in participants' understanding of advertising and packaging. The cadres are committed to disseminating this information to the wider community. Continuous assistance is expected to make Bumisari Village a pilot for simple nutritious food processing products made from local ingredients with attractive packaging.
Mineralogical classification and impact simulation of the Punggur (H7-Melt Breccia) Meteorite, Indonesia Muztaba, Robiatul; Danni Gathot Harbowo; Hakim Luthfi Malasan
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.v11i2.29459

Abstract

Meteorite falls in Indonesia are rarely examined through systematic scientific analysis, resulting in limited documentation of fall events and incomplete classification of recovered specimens. The Punggur meteorite fall of 28 January 2021 reportedly produced at least five fragments. This study addresses that gap by analyzing two fragments (PM-01 and PM-02) to confirm their extraterrestrial origin and to characterize their physical, chemical, and mineralogical properties. Physical characterization involved measurements of density, magnetic susceptibility, and surface morphology. The chemical composition was determined using X-ray fluorescence (XRF), while microscopic imaging was employed to compare fusion-crust features with interior textures. A web-based meteoroid-impact modeling tool was further employed to estimate the atmospheric entry behavior and environmental effects of the fall. The result is that PM-01 has dimensions of 13 × 6.5 × 8 cm, a volume of 419 mL, a mass of 2200 g, and a density of 5.25 ± 0.26 g/cm³. PM-02 measures 25 × 23 × 16 cm, with a volume of 443 mL, a mass of 1820 g, and a density of 4.06 ± 0.06 g cm⁻³. Modeling results indicate that post-airburst fragments retained a residual velocity of approximately 16.2 km s⁻¹, while the airburst released an estimated 2.12 × 10¹⁰ J of energy (0.51 × 10⁻⁵ megatons). The shock wave reached observers 1.78 minutes after the event, accompanied by a maximum wind velocity of 0.0422 m s⁻¹ and sound levels near 25 dB—consistent with witness reports and the observed impact crater. Microscopic and XRF analyses reveal coarse-grained textures with high concentrations of Fe, Si, and Mg. PM-01 contains 23.55% Fe, 20.18% Si, and 12.48% Mg, whereas PM-02 contains 48.09% Fe, 25.06% Si, and 10.21% Mg. Thus, this finding indicates that the specimen’s mineralogy is dominated by olivine ((Mg, Fe)₂SiO₄), confirming that it aligns with the classification of an H7 melt breccia.
Comparative Study of Observation with Theoretical Contrast using the Schaefer and Crumey Methods on the Image Result Observation Using OZT-ALTS Robotic Telescope Muztaba, Robiatul; Mufidanisa, Yasmin
Al-Marshad: Jurnal Astronomi Islam dan Ilmu-Ilmu Berkaitan Vol 11, No 2 (2025): Al-Marshad
Publisher : University of Muhammadiyah Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/jam.v11i2.25614

Abstract

Observing the crescent moon (hilal) is crucial as it significantly impacts religious activities, particularly for the Muslim community. However, there are challenges associated with hilal observation due to its appearance as a young crescent moon, making it very small apparent size, resulting in low visibility. Additionally, hilal observations are conducted before sunset when the sky still retains brightness, causing a narrow contrast between the moon's light and the background sky. This research aims to compare the contrast values obtained from observing the hilal with the OZT-ALTS Robotic Telescope to theoretical hilal values. Two theoretical contrast methods are examined in this study. The observed contrast values show an increase over time, albeit fluctuating due to cloud interference. The Schaefer contrast also increases over time, with values similar to observed contrast. The Crumey contrast decreases approaching dusk but increases after sunset. Spearman correlation analysis is used to investigate the relationship between each contrast. Observation contrast and Schaefer show a positive Spearman correlation of 0.1413. However, the contrast between observation and Crumey shows a negative correlation of -0.0603. The correlation between Schaefer and Crumey also resulted in a negative correlation of -0.8943. Theoretical contrast in this study only shows the ideal model at the time of observation because dynamic environmental factors are difficult to model, thus the relationship between observed and theoretical contrast is weak. The theoretical contrast in this study does not can be used as a reference in hilal observation
Co-Authors Danni Gathot Harbowo Hakim Luthfi Malasan Maulidia Rahayyu, Annisa Mufidanisa, Yasmin Nur Rohman, Tefur Pratama, Alvin