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All Journal Journal of Tropical Soils BAREKENG: Jurnal Ilmu Matematika dan Terapan Jurnal Pengabdian Masyarakat Singa Podium (JPMSIPO)
Djafar, Muhammad Kabil
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Social Sciences Transportation

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Pelatihan Matematika Bagi Tim Lomba Cepat Tepat (LCT) SMP Negeri 9 Kota Kendari Dalam Rangka Persiapan Mengikuti LCT Tingkat SMP/MTs se-Sulawesi Tenggara di FMIPA UHO Somayasa, Wayan; Jufra, Jufra; Sani, Asrul; Djafar, Muhammad Kabil; Budiman, Herdi; Muhtar, Norma
Jurnal Pengabdian Masyarakat Singa Podium (JPMSIPO) Vol. 1 No. 3 (2023): Oktober
Publisher : LPPM Universitas Bung Karno

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58965/jpmsipo.v1i3.15

Abstract

Title of this community service is “Mathematics Training for the Fast Precise Competition (LCT) Team at a SMP Negeri 9 Kendari in Preparation for Taking Part in LCT at SMP/MTs Level Throughout Southeast Sulawesi at FMIPA UHO”. Implemented with the aim of increasing the capacity of mathematics teachers at SMP Negeri 9 Kendari and improving the abilities of the LCT Team at SMP Negeri 9 Kendari in preparation for taking part in LCT level throughout Southeast Sulawesi at FMIPA UHO. The results of this community service activity are increased capacity of mathematics teachears and an increase in knowledge and abilities of the LCT Team at SMP Negeri 9 Kendari in the mathematics. The LCT Team SMP Negeri 9 is ready to take part in LCT Mathematics.
USING A MONOTONE SEQUENCE OF FUNCTIONS TO DETERMINE THE SHORTEST ARC LENGTH OF CIRCLES CONNECTED ANY TWO POINTS ON SPHERE Djafar, Muhammad Kabil; Safiuddin, La Ode; Laome, Lilis; Muhtar, Norma; Budiman, Herdi; Cahyono, Edi; Gubu, La.; Alfian, Alfian; Alamsyah, Indra; Kohalsum, Askar
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 19 No 3 (2025): BAREKENG: Journal of Mathematics and Its Application
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol19iss3pp1923-1932

Abstract

This paper discusses about arc length of circles that connected any two points on a sphere. On a sphere, there are infinitely many circles that connect any two points. Using a monotone sequence of functions, we can show that the shortest arc length of circle that connect any two points on sphere is the circle with its center at the origin.
Vermicast of Earthworm as Ecosystem Engineers within Different Vermireactor Shape Kilowasid, Laode Muhammad Harjoni; Sanjaya, Muhammad Fahyu; Rakian, Tresjia Corina; Alam, Syamsu; Djafar, Muhammad Kabil; Muliddin, Muliddin
JOURNAL OF TROPICAL SOILS Vol. 25 No. 2: May 2020
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2020.v25i2.83-92

Abstract

Earthworms as ecosystem engineers can modify the quality of vermibed assembled from mixed soil with organic material in a vermireactor. Various in shapes of the vermireactor are used to produce a vermicast for biofertilizer in agriculture. The objective of this research was to study the vermicast production and its quality produced from a variety of vermireactor shapes. Earthworm (Pheretima sp.) which was applied to the vermireactor consists of: with- and without of earthworms. Three shapes of the vermireactor, namely cylinder, square, and rectangular has been tested. Compost of Chromolaena odorata pruning mixed with soil was used as vermibed. The vermicast process ran until 28 days. The results showed that vermireactor with earthworms which were successfully converted to vermicast was about 49.24% from the vermibed volume, however, no vermicast formed was found from vermireactor without earthworms. The difference in vermicast produced from different vermireactor shapes was not significant. The value of pH, total-N, and C/N ratio among the vermicast was different. The number of the morphological character of bacteria colonies in the vermicast produced from the square vermireactor was the highest, while from cylinder vermireactor was the lowest. We concluded that the quality of vermicast from earthworm (Pheretima sp.) activity was determined by the shape of the vermireactor.
Co-Authors Alfian Alfian Asrul Sani Budiman, Herdi Edi Cahyono Gubu, La. Indra Alamsyah Jufra, Jufra Kohalsum, Askar la Ode Safiuddin Laode Muhammad Harjoni Kilowasid Lilis Laome Muhtar, Norma Muliddin Sanjaya, Muhammad Fahyu SYAMSU ALAM TRESJIA CORINA RAKIAN, TRESJIA CORINA Wayan Somayasa