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Journal of Science and Science Education (JoSSEd)
Published by Universitas Mataram
ISSN : 27741869     EISSN : 27742105     DOI : https://doi.org/10.29303/jossed
Core Subject : Science, Education, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Neuroscience Physics
Journal of Science and Science Education (JoSSEd) is a Peer Review international journal published by Postgraduate Mataram University. It is firmly established as an authoritative voice in the world of science and science education. JoSSEd publishes scholarly papers that focus on science and science education like the teaching and learning of science in school settings ranging from early childhood to university education. It bridges the gap between research and practice, providing information, ideas, and opinion. As a truly international journal, JoSSEd welcomes contributions from any country provided that the authors explain their local contexts and demonstrate the significance of their work for a global readership.
Arjuna Subject : Umum - Umum
Articles 13 Documents
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Search results for , issue "Vol. 5 No. 1 (2024): April" : 13 Documents clear
Investigation of Radioisotope count fluctuation and Shifts of Their Content Accumulation in Rock Minerals Pasangka, Bartholomeus; Pasangka, Irvandi Gorby
Journal of Science and Science Education Vol. 5 No. 1 (2024): April
Publisher : Pascasarjana, Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jossed.v5i1.7384

Abstract

: The main problem studied in this study concerns the fluctuations in the number of radioisotopes and the shift in the center of their accumulation in rock minerals in Oesuu, Central Kupang after experiencing weathering a few years ago. The objectives of the study: determine the range of radioisotope counts in rock minerals in Oesuu Central Kupang after weathering several years ago, investigate the shift in the center of accumulation of radioisotope content in rock minerals in Oesuu Central Kupang by time-dependent radioisotope migration and decay processes. Research methods: observation, survey, mapping, analysis, and interpretation. Brief research procedures: Observations to determine the boundaries of the research site and create a grid, measure the background count around the survey location, measure the field data, correct the data, make three-dimensional curves and contours of the radioisotope radiation count, interpret and draw conclusions. Research result. The range of radioisotope radiation counts in rock minerals is 10 Counts per minute (cpm) to 107 cpm, and the results of the 2008 study were 9 cpm to 117 cpm. The distribution of the accumulation center of radioisotope content in rock minerals has shifted from the edge towards the center of the study site, which is most likely caused by radioisotope migration and accumulated by very strong cohesive forces between radioisotope elements contained in rock minerals.
The Effectiveness of Plant Growth Promoting Rhizobacteria (PGPR) on the Growth of Root Nodules of Peanut Genotypes under Water Deficit Condition Restiyah, Demy Afiya; Kisman, Kisman; Hemon, A Farid
Journal of Science and Science Education Vol. 5 No. 1 (2024): April
Publisher : Pascasarjana, Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jossed.v5i1.8363

Abstract

The deficiency of water sources and soil fertility are obstacles to producing peanuts in dry land. One of effort to increase production on dry land is the utilization of PGPR biofertilizers. This study aimed to determine the growth of plants and root nodules of several peanut genotypes applied with PGPR, to understand the interaction between several peanut genotypes and PGPR on plant growth and root nodules, and to examine the relationship between water deficit conditions and the formation of root nodules. This experiment used a Complete Randomized Design-split split-plot design with the main plots being D0 = optimal conditions (no water deficit) and D1 = water deficit. The subplots were P0 = no PGPR and P1 = with PGPR. The sub-subplots consisted of five peanut genotypes: V1 = Hypoma-I, V2 = Domba, V3 = Talam, V4 = Bison, and V5 = G300-II. The observations showed that the addition of PGPR resulted in higher plant growth compared to those without PGPR and had more effective root nodules in nitrogen fixation compared to treatments without PGPR. The application of PGPR and genotype did not show significant interaction on plant growth and root nodules under water deficit conditions. Water deficit significantly affected all parameters of plant growth and root nodules. PGPR significantly affected the parameters of leaf number rate, nodule number, and nodule weight. Genotype significantly affected the plant height rate. The interaction of water deficit and genotype significantly affected the leaf number rate, while the interaction of water deficit and PGPR, and the interaction of PGPR and genotype did not significantly affect all observation parameters.
A Stone Can Bounce on the Surface of Water: A Conceptual Physics Analysis Study of Students Wattimena, Herman Semuel; Jamaludin, Jamaludin; Batlolona, John Rafafy
Journal of Science and Science Education Vol. 5 No. 1 (2024): April
Publisher : Pascasarjana, Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jossed.v5i1.9564

Abstract

Throwing a stone on the surface of the water has been a popular hobby for thousands of years, but in recent times, this phenomenon is rarely encountered in physics education. Flat and round stones are the best choice due to their favorable surface area, which creates a rebound when they collide with the water. However, the "magic angle" between the rotating stone and the water must be around 20 degrees to achieve the maximum number of bounces. This is an interesting phenomenon to explore, especially for students in rural areas who often visit rivers or beaches to play. Therefore, this study was conducted to analyze the conceptual understanding of physics students regarding the phenomenon of stones bouncing on the surface of water. This research is a qualitative study that analyzes students' responses through direct questions posed by the teacher. The study was conducted with 20 ninth-grade students at SMP Negeri 81 Maluku Tengah. The findings show that students have a very weak understanding of the physics concepts related to the stone-bouncing phenomenon. They are unable to explain the phenomenon scientifically because they are still influenced by answers based on local and cultural experiences. As a result, the teacher took action by engaging students in direct learning and providing clear explanations of the concepts. Consequently, students' conceptual understanding of physics improved, and they were able to explain the phenomenon scientifically

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