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Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam (JURRIMIPA)
Published by Pusat Riset dan Inovasi Nasional
ISSN : 28289382     EISSN : 28289390     DOI : https://doi.org/10.55606/jurrimipa.v1i1
Core Subject : Education,
Mathematics
Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam adalah jurnal yang ditujukan untuk publikasi artikel ilmiah yang diterbitkan oleh Pusat riset dan Inovasi Nasional, Universitas Sains dan Teknologi Komputer. Jurnal ini adalah jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam yang bersifat peer-review dan terbuka. Bidang kajian dalam jurnal ini termasuk sub rumpun Ilmu IPA, Ilmu Matematika, Ilmu Kebumian dan Angkasa. Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam menerima artikel dalam bahasa Inggris dan bahasa Indonesia dan diterbitkan 2 kali setahun: April dan Oktober.
Arjuna Subject : Matematika - Matematika (Lain-Lain)
Articles 200 Documents
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Analisis Probabilitas Hujan Menggunakan Data Historis Dari BMKG Wilayah I Tahun 2013-2015 Arnah Ritonga; Asni Al Amini; Livia Mutianda; Riamonda Singarimbun; Aiman Hidayat Baeha; Glensius Rayhane Pasaribu; Juanda Arief Darmawan Damanik
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 4 No. 1 (2025): April : Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v4i1.4367

Abstract

Rainfall potential analysis plays a critical role in the management of air resources, mitigation of hydrometeorological disasters, and agricultural activity planning. Accurate estimation of rainfall patterns is essential to ensure effective decision-making in irrigation systems, water resource management, and disaster risk reduction strategies. This study aims to model the probability of rainfall occurrence using a statistical approach based on historical data obtained from the Bureau of Meteorology. The data spans a multi-year period and captures seasonal and regional variability in rainfall events. To characterize rainfall patterns, various probability distributions are tested, including the exponential distribution and the Weibull distribution, which are commonly applied in hydrological studies. Furthermore, the Markov chain method is employed to assess the likelihood of rainfall occurrence on a given day based on the conditions of the preceding day, thereby capturing temporal dependencies. Parameter estimation is conducted using Maximum Likelihood Estimation (MLE), a robust statistical method that enhances the precision of the model. The suitability of each probability distribution in representing the observed rainfall data is evaluated through goodness-of-fit tests such as the Kolmogorov-Smirnov test. The findings reveal that certain distributions align more closely with the local rainfall characteristics, demonstrating the importance of regional analysis in climate modeling. The combination of probabilistic modeling, Markov analysis, and rigorous statistical testing provides a reliable framework for forecasting rainfall. These results are expected to serve as a scientific basis for stakeholders in agriculture, environmental planning, and disaster preparedness, offering insights that support sustainable water resource utilization and risk management.
Analisis Hubungan Kemampuan Pemahaman Konsep IPA terhadap Keterampilan Berpikir Kritis Siswa SMP pada Materi Pesawat Sederhana Desmauli Lumbanbatu; Nancy Susianna; Alvin Stanza Kiswandhi; Nerru Pranuta Murnaka
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 4 No. 1 (2025): April : Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v4i1.4381

Abstract

This study aims to analyze the relationship between students' understanding of science concepts and their critical thinking skills in junior high school, specifically on the topic of simple machines. The research method used is descriptive correlational with a quantitative approach. The sample consisted of one class. Data were collected through tests, including a concept understanding test and a critical thinking skills test. The analysis results show a significant relationship between the understanding of science concepts and students' critical thinking skills. These findings are consistent with previous studies stating that a strong understanding of concepts can enhance students’ critical thinking abilities. Based on these results, it is recommended that science curricula integrate learning approaches that simultaneously promote conceptual understanding and critical thinking.
Literature Study of The Effect of Aluminum Doped ZnO Nanoparticles on Structure and Gap Energy Muchamad Anjar Fadillah; Heru Harsono; Mauludi Ariesto Pamungkas
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 4 No. 1 (2025): April : Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v4i1.4491

Abstract

Nanomaterials have a variety of uniqueness and attractiveness, it is considered necessary to carry out literature study, beside the laboratory investigation, among others, on the nanoparticle structure and energy gap of ZnO nanoparticles doped with aluminum (Al) resulting from synthesis using various methods. In this study, the structure of the nanoparticles was divided into three types, namely crystal structure, crystallite size, and morphology. The crystal structure of the Al doped ZnO nanoparticles is hexagonal wurtzite. It is found, that, a decrease in crystallite size occurs as the doping of Al into ZnO increases to its solubility limit. A similar pattern also occurs in particle size. The high concentration of Al doping results in agglomeration. The morphology of Al doped ZnO nanoparticles in some references of this study are rod, spherical, and irregular spheres. The energy gap value of Al doped ZnO nanoparticles increases with the increasing concentration of Al doping in ZnO. So, it can be said, that Al as a doping material has an influence on the structure and optical properties of ZnO nanoparticles.
Analisis Tingkat Pemahaman Mahasiswa Universitas Negeri Medan PSPK 23 B Terhadap Soal Teori Atom Freddy Tua Musa Panggabean; Dimas Ridho; Christy Chirona Veronika; Happy Glory Maritoma; Siti Zahara
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 4 No. 1 (2025): April : Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v4i1.4551

Abstract

This study aims to analyze the level of understanding of PSPK 23 B students at Medan State University on atomic theory questions. With a quantitative descriptive approach, data were collected through multiple-choice tests filled out by 30 students. The results showed an average understanding of 75.33%, which is quite good. However, there was significant variation where some students mastered basic concepts (eg Dalton and Thomson's atomic models), while others had difficulty with abstract topics (eg Bohr's model and quantum mechanics). This finding is in line with previous studies on misconceptions in atomic structure. This study emphasizes the importance of innovative learning strategies, such as visual media and conceptual approaches, to improve student understanding. Periodic evaluation is needed to detect learning gaps and adjust teaching methods. The results of this study can be a basis for developing more effective chemistry education practices.
Analisa Angka Kapang dan Khamir Pada Lulur Bedda Lotong Dengan Penambahan Rumput Laut (Eucheuma cottonii) Rahmawati Saleh; Andi Santi; Tasir Pammula; Ilham Ahmad; Ernawati Jassin; Afdalia Afdalia
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 4 No. 1 (2025): April : Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v4i1.4557

Abstract

Bedda Lotong is a traditional scrub from the Bugis tribe of South Sulawesi, Indonesia. The name ‘Bedda Lotong’ literally means ‘black powder’ in Bugis language, referring to the distinctive black colour of this scrub which comes from its main ingredient, white glutinous rice that is roasted until burnt. The purpose of this study was to determine the number of colonies of moulds (thread moulds) and yeasts (one-celled fungi) in Bedda Lotong with the addition of Eucheuma cottoni seaweed. In addition, this study also aimed to determine the level of panellists' liking through organoleptic tests. The research design used was a factorial Completely Randomised Design (CRD) with 3 levels of treatment with 3 replications. The treatment of adding Eucheuma cottoni seaweed as a microbial growth inhibitor. Data processing was done with analysis of variance (ANOVA) test and continued with Duncan test using SPSS V.23 software. Based on the results of the study, it was obtained that the effect of the addition of Eucheuma cottoni seaweed did not significantly affect the ALT/TPC test (>0.05) (0.087) and had a significant effect (<0.05) (0.003) on the Bedda Lotong pH test and in the treatment of A1 (5%) and B1 (10%) seaweed concentrations gave organoleptic test scores from panellists, namely a score of 4 (like).
Analisis Laju Pertumbuhan Kota Pematang Siantar dengan Menggunakan Konsep Integral Tak Wajar pada Tahun 2024–2025 Suvriadi Panggabean; Petra Putri Sarinah Pandiangan; Mhd Fachrizal; Arief Rachman Pakpahan; Alya Dwi Lestari; Livia Mutianda; Lestari Novianti Sinurat
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 4 No. 1 (2025): April : Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v4i1.4579

Abstract

In this study, the population growth rate of Pematang Siantar City during the period 2022–2025 is discussed through an improper integral approach. Population growth patterns must be analyzed and predicted in the long term. Linear, geometric, and exponential growth models are used to analyze data taken from the Statistics Center. The calculation results show that the population growth rate changes every year, with an average change of 0.10% per year. The prediction for 2025–2026 shows a growth of 0.59%, indicating an increase in population. However, through an improper integral approach, it is found that a population that experiences a decrease in growth rate over time will reach a limited cumulative total population value, even if the population continues to increase. These results indicate that a long-term downward trend can lead to population shrinkage, uncontrolled growth can lead to population density. As a result, this study is expected to provide a scientific basis for population policies and sustainable development planning in Pematang Siantar City.
Analisis Percepatan Gravitasi pada Ayunan Sederhana dengan Memanfaatkan PhET (Physics Education Technology) Diah Aryati Puji Lestari; Andi Nurcahyo; Iryan Dwi Handayani
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 3 No. 2 (2024): Oktober : Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v3i2.4598

Abstract

Physics is a part of natural science that has the properties of processes, products and values. Most of the concepts of physics are formulas, but they can be tested through experiments. Along with technological developments in experiments often used technology-based aids, for example the use of PhET (Physics Education Technology) applications to determine gravitational acceleration through simple swivel arrangements. The simple rotation experiment was performed by giving variations in rope lengths of 50 cm, 60 cm, 70 cm, 80 cm, 90 cm, and 100 cm for each of the different bulk masses of 0.5 kg and 1 kg. The study aims to determine the value of gravitational acceleration in simple rotations using PhET applications. (Physics Education Technology). Research data is displayed in tables and graphs. The data analysis uses a linear regression equation between the length of the string (L) and the square of the period (T2). Large gravitational acceleration is obtained through the gradient of the linear equation of the longness of the rope (L). The magnitude of gravitational acceleration obtained for a 0.5 kg body mass was 9.50 m/s2, for a 1 kg body weight was 9.67 m /s2, and the average perception of gravity was 9.58 m / s2.
Pengembangan LKPD Berbasis Pendekatan Saintifik untuk Melatih Kemampuan Berpikir Kritis Matematis Novi Avila Junianti; Isnaniah Isnaniah; M. Imamuddin; Arifmiboy Arifmiboy
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 4 No. 1 (2025): April : Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v4i1.4714

Abstract

This study is founded on the issues identified, specifically the dearth of learning resources, the LKPD's lack of training in mathematical critical thinking, and the fact that the LKPD that is currently available was created by educators who did not follow a scientific methodology, which has led to students' low levels of mathematical critical thinking. In order to educate mathematical critical thinking skills in class VIII MTsS Asy-Syarif Koto Laweh for the 2023–2024 academic year, this project intends to produce LKPD based on a scientific approach that satisfies the requirements of validity, practicality, and effectiveness. Using Sugiyono's development paradigm, this study is called research and development, or R&D. Student answer surveys, mathematical critical thinking ability assessments, and validation sheets are the equipment. The techniques for data analysis that are employed are validity analysis, practicality analysis, analysis of effectiveness. Based on development study conducted, LKPD is obtained with a validity level of 84.2%, of which 82.33% are on extremely practical criteria, 78.94% are on effective criteria, and 82.33% are on highly valid criteria for the level of practicality. We may conclude that the LKPD Asy-Syarif Koto Laweh created, which is based on the Scientific Approach to Train Mathematical Critical Thinking Skills in Class VIII MTsS, satisfies the requirements of being valid, practical, and efficient.
Pengembangan LKPD Berintegrasi Nilai-Nilai Keislaman untuk Melatih Kemampuan Pemecahan Masalah Matematis Tri Nanda Akbar Maualana; Tasnim Rahmat; M. Imamuddin; Pipit Firmanti
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 4 No. 1 (2025): April : Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v4i1.4716

Abstract

This research was motivated by the problems found, namely the lack of learning media, the LKPD used had not trained mathematical problem solving abilities, the existing LKPD was LKPD created by educators who had not been connected to Islamic teachings, resulting in a decline in students' mathematical problem solving abilities. This research aims to produce LKPD integrating Islamic values to train problem solving skills in class This research is development research or RnD using the Sugiyono development method. The instruments used were validation sheets, student response questionnaires, and mathematical problem solving ability tests. The data analysis techniques used are validity data analysis, practicality analysis, and effectiveness analysis. Based on the development research that has been carried out, an LKPD with a validity level of 80% is in the valid qualification, for the practicality qualification, namely 78.41% is in the practical criteria, and for the effectiveness level, namely 80,76% is in the effective qualification. It can be concluded that the LKPD integrates Islamic values to train mathematical problem solving abilities which was developed including valid, practical and effective criteria.
Pengaruh Self Efficacy Terhadap Kemampuan Pemecahan Masalah Matematis Siswa di Kelas VII MTsN 6 Agam Tahun Pelajaran 2024/2025 Siti Halimah; Isnaniah Isnaniah; Darul Darul; Rusdi Rusdi
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 4 No. 1 (2025): April : Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v4i1.4865

Abstract

This research is motivated by the problems found in the seventh-grade class at MTsN 6 Agam, where students' mathematical problem-solving abilities are still relatively lacking, with many students scoring below 40 in problem-solving with a percentage ranging from 33%-44%, categorized as low. The low problem-solving abilities of the students are suspected to be influenced by one factor, namely Self Efficacy.It was found by the researcher during the observation that students easily give up and are unwilling to try to complete tasks, indicating a lack of self-efficacy among the students.The purpose of this research is to determine the effect of self-efficacy on mathematical problem-solving abilities.The population in this study is the seventh-grade students of MTsN 6 Agam for the 2024/2025 academic year.The research method used is quantitative research employing the ex post facto type of research.The sample was randomly taken from 20% of each class VII at MTsN 6 Agam, resulting in 51 students.The instruments used were the self-efficacy questionnaire and mathematical problem-solving ability test questions.Based on the analysis of the research data, it was found that there is a significant influence of self-efficacy on students' mathematical problem-solving abilities.This is evidenced by the hypothesis test results with a t_value of 17.968 and a t_table of 2.009, thus t_value > t_table at a confidence level of α = 0.05, which means there is a significant influence of self-efficacy on students' mathematical problem-solving abilities.without any reference or formula.

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