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All Journal Journal of Research and Publication Innovation Algoritma: Jurnal Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa
Grace Purba
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Computer Science & IT Earth & Planetary Sciences Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences Other

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HUBUNGAN PANJANG BERAT IKAN LAYANG ( DECAPTERUS SP.) YANG TERTANGKAP DI PERAIRAN ACEH UTARA YANG DIDARATKAN DI PELABUHAN PERIKANAN SAMUDERA (PPS) LAMPULO ACEH UTARA Mila Sianipar; Lidia Samosir; Grace Purba; Erwin Sapeai; Wendy Pakpahan; Ria Retno
Journal of Research and Publication Innovation Vol 2 No 3 (2024): JULY
Publisher : Journal of Research and Publication Innovation

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Abstract

Aceh waters are a place for fishermen to look for fish, one of which was flying fish (Decapratus sp.) which was landed at the Lampulo Ocean Fisheries Port (PPS), North Aceh. Flying fish (Decapratus sp.) was a fishery commodity that was in great demand by people globally, especially in Indonesia. This research aims to measure the length and weight of flying fish (Decapratus sp.) using survey and analysis methods. The results of this research obtained a value for the total number of fish which was 50 fish. With the overall sample length of fish ranging from 140 mm to 205 mm, the dominant total length of fish caught was in the average range of 166.28 mm. Meanwhile, the weight of flying fish (Decapterus sp.) ranges from 31 to 76 grams, with an average fish weight of 46.06 grams. The calculation result of the b value obtained from testing the flying fish (Decapterus sp.) at the Pematangsiantar Parbesaran Market was 2.68, with the r2 value being 0.89. Based on the b value obtained, it can be stated that the length and weight of the fish was < 3, which means negative allometric meaning that length growth is faster than weight growth.  
Estimasi Volume Air Waduk Lau Kawar Menggunakan Pendekatan Integral Volume Kulit Tabung Rizka Nabila Damanik; Grace Purba; Klara Laoli; Bobby Delon Togatorop; Windy Suryani; Suvriadi Panggabean
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 3 No. 3 (2025): Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/algoritma.v3i3.483

Abstract

This study aims to estimate the water volume of Lau Kawar Reservoir using the cylindrical shell method of integral calculus. The reservoir is assumed to be a perfect cylinder with a radius of 564 meters and a depth of 8.45 meters. The volume is calculated using both the shell method and the standard analytical formula for cylinders. The result shows a water volume of 8,437,640.45 m³. Both methods produced identical results with an absolute error of 0.00 m³. This proves that the shell method is highly accurate for symmetrical reservoir shapes. The study demonstrates how integral calculus can be applied to real-world problems in hydrology.
Co-Authors Bobby Delon Togatorop Erwin Sapeai Klara Laoli Lidia Samosir manik, ria retno Mila Sianipar Rizka Nabila Damanik Suvriadi Panggabean Wendy Pakpahan Windy Suryani