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Algoritma: Jurnal Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa
Published by Asosiasi Riset Ilmu Matematika dan Sains Indonesia
ISSN : 30326230     EISSN : 30465427     DOI : 10.62383
Core Subject : Science, Education,
Earth & Planetary Sciences Mathematics
Bidang kajian dalam jurnal ini termasuk sub rumpun Ilmu Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa. Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa
Arjuna Subject : Matematika - Matematika (Lain-Lain)
Articles 204 Documents
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Characteristics of Meluhu Formation Sandstone, Southeast Sulawesi: A Systematic Literature Review Isman Saleh
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 4 No. 5 (2026): 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.v4i5.1084

Abstract

The Meluhu Formation is an important Mesozoic sedimentary unit in Southeast Sulawesi that records the geological and depositional evolution of the region. However, studies specifically addressing the characteristics of its sandstone remain relatively limited and show variations in lithology, provenance, depositional environment, and age interpretation. This study aims to synthesize the available literature on the lithological, petrographic, provenance, depositional, stratigraphic, and tectonic characteristics of Meluhu Formation sandstone. A systematic literature review was conducted using relevant peer-reviewed articles, conference proceedings, and geological reports. The reviewed studies were selected based on their relevance to the Meluhu Formation and the regional geological framework of Southeast Sulawesi, and the extracted information was synthesized thematically. The results indicate that the sandstones are dominated by quartz and lithic fragments, with variable feldspar contents, and are classified as sublitharenite, lithic arenite, arkose, subarkose, and greywacke. Provenance analysis indicates contributions from recycled orogen, interior craton, and undissected arc provinces, while the depositional environment evolved from fluvial and deltaic settings toward shallow marginal marine conditions. The formation also exhibits a significant age controversy between Triassic and Middle–Late Miocene interpretations. These findings highlight the need for integrated geochronological, sedimentological, petrographic, and diagenetic studies to refine the geological history and reservoir potential of the formation.
Analisis Sistematis Efektivitas Model Problem Based Learning terhadap Kemampuan Pemecahan Masalah Shofura Khaudhiya Zain; Hanun Fithriyatul Islam
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 4 No. 5 (2026): 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.v4i5.1090

Abstract

This study investigates how mathematical problem-solving ability can be strengthened through the implementation of Problem Based Learning (PBL). The research was carried out using a Systematic Literature Review (SLR) approach, which proceeded through the formulation of research questions, a literature search conducted via Google Scholar, application of inclusion and exclusion criteria, article selection, data analysis, and synthesis of results. Thirteen studies deemed relevant were then examined in depth based on their reported outcomes. The study confirms that PBL consistently drives positive advancements in mathematical problem-solving skills for both school and tertiary-level students. Its effectiveness is evident from increased pretest-posttest scores, significant differences between experimental and control groups, high N-Gain achievements, improved learning mastery, and substantial effect sizes. PBL's positive impact was consistently found across various educational levels and categories of students' initial mathematical ability. Moreover, PBL remained effective when combined with other instructional approaches, including differentiated instruction and local cultural contexts. In conclusion, these insights substantiate that Problem-Based Learning serves as a potent and versatile instructional framework for cultivating mathematical problem-solving proficiencies across various educational echelons.
Analisis Model Predator Prey Interaksi Maleo (Macrocephalon maleo) dan Biawak (Varanus salvator) Dengan Struktur Usia Serta Faktor Pemanenan Pada Maleo Ibran S. Tepanus; Emli Rahmi; Armayani Arsal; Agusyarif Rezka Nuha; Hasan S. Panigoro
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 4 No. 5 (2026): 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.v4i5.1112

Abstract

This study discusses the population dynamics of the interaction of the Maleo bird (Macrocephalon maleo) as prey and the monitor lizard (Varanus salvator) as predator by considering age structure in the prey and the presence of harvesting. The prey population is divided into three stages, namely eggs , juveniles , and adults , while the predator population is denoted by . The mathematical model is formulated in a four-dimensional nonlinear ordinary differential equation system. The objectives of this research are to construct the model, analyze the equilibrium points and their stability, and perform numerical simulations to illustrate the system’s behavior. The analysis yields two equilibrium points, namely the extinction point  and the coexistence point  Stability analysis using the Routh-Hurwitz criterion shows that  is locally asymptotically stable if it satisfies , while  is locally asymptotically stable if the coefficients of the characteristic polynomial satisfy certain conditions. Numerical simulations confirm that  is locally asymptotically stable in the form of a stable focus. Variations in the harvesting rate show that an increase in the value of  causes a decrease in the predator population, and even at , the Maleo bird and monitor lizard populations experience extinction. Biologically, age structure and harvesting rate significantly affect ecosystem sustainability. This research contributes to the development of mathematical ecology models and serves as a basis for consideration in Maleo bird conservation policies.
Analisis Tingkat Pemahaman Konsep Pengukuran pada Mahasiswa PGSD UNRI Angkatan 2024 Melly Sundari Sitorus; Nuraini Nuraini; Jesi Alexander Alim; Cici Oktaviani
Algoritma : Jurnal Matematika, Ilmu pengetahuan Alam, Kebumian dan Angkasa Vol. 4 No. 5 (2026): 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.v4i5.1115

Abstract

An understanding of mathematical concepts is a crucial competency for Primary School Teacher Education (PGSD) students—as prospective teachers—to teach mathematical concepts meaningfully. One fundamental concept that must be mastered is measurement, which encompasses an understanding of units, measuring instruments, and their application in various contexts. This study aims to analyze the level of understanding regarding measurement concepts among the 2024 cohort of PGSD students at the University of Riau. The study employs a quantitative approach using a descriptive method. Data were collected via a questionnaire administered to 40 students from the 2024 cohort and analyzed using descriptive statistics. The research results indicate that the majority of students possess a good understanding of measurement concepts. Based on the analysis of 25 statement items, the average positive response was 95.1% and the negative response was 4.9%, placing the results in the "very good" category. These findings demonstrate that the students have a solid grasp of fundamental measurement concepts, units, measuring instruments, and the application of measurement concepts in daily life. These results can serve as a basis for consideration in developing mathematics instruction for prospective elementary school teachers.

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