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All Journal Jurnal Pendidikan Fisika Indonesia Jurnal Pendidikan IPA Indonesia
E. H. Sujiono
Department of Physics, Faculty of Mathematics and Sciences, Universitas Negeri Makassar, Indonesia
Education Physics

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KARAKTERISTIK SIFAT FISIS BATUAN NIKEL DI SOROWAKO SULAWESI SELATAN Sujiono, E. H.; Diantoro, M.; -, Samnur
Jurnal Pendidikan Fisika Indonesia Vol 10, No 2 (2014): July 2014
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v10i2.3452

Abstract

Sulawesi Selatan memiliki cadangan nikel berlimpah di daerah Sorowako, Kabupaten Luwu Timur, yang sampai saat ini masih terikat kontrak karya dengan P.T. Vale Indonesia. Potensi nikel dalam jumlah besar dan terus bertambah sehingga dalam proses produksi dan eksplorasinya harus tepat, ramah lingkungan agar memiliki nilai ekonomi tinggi. Data yang dilaporkan dalam penelitian ini berupa hasil karakterisasi komposisi unsur, senyawa dan kekerasan batuan nikel. Pemilahan dan penyiapan sampel dilakukan secara manual dalam ukuran 2 cm x 2 cm x 0,5 cm. Hasil analisis menunjukkan bahwa komposisi utama dari batuan nikel didominasi oleh nikel (Ni) dan silikon (Si). Kekerasan batuan nikel mencapai 130 sampai 155 HVN-100 serta temperatur transisi gelas pada kisaran 9000C. Berdasarkan data ini, batuan nikel potensial untuk diolah secara industri.ABSTRACTSouth Sulawesi has abundant reserve of nickel in Sorowako, East Luwu, which is still in the status of work contract bond with P.T. Vale, Indonesia. The huge nickel potential of the area and the growing production brings the need to process the exploration precisely and friendly to generate high economic value. The data reported in this study are characterization result of the elements composition, compounds and hardness of the nickel ore. Samples were prepared manually, each in size of 2cm x 2cm x 0,5cm. The analysis showed that the main composition of the nickel ore was dominated by nickel (Ni) and silicon (Si). Nickel ore hardness reaches 130 to 155 HVN-100 as well as the glass transition temperature in the range of 9000C. Based on the data found, the nickel ores are furthermore processable industrially.
STUDY ON PHYSICAL-CHEMICAL PROPERTIES OF FURNACE-NICKEL-SLAG POWDER FOR GEOPOLYMER APPLICATION Samnur, S.; Husain, H.; Zulfi, A.; Sujiono, E. H.
Jurnal Pendidikan Fisika Indonesia Vol 12, No 2 (2016): July 2016
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v12i2.4728

Abstract

This research aims to prepare powder of nickel slag from furnace machine, identify, and analyze of the elements or compounds containing in the sample. The data retrieval was done with the analysis of elemental composition, phase microstructures, crystal size, distribution, and composition mapping of the samples by using XRD, Rigaku Miniflex II, and SEM-EDS, Tescan Vega-3. XRD result indicates that the formation which the similar to amorphous phase was identified and the formation at peak 2θ = 28.01° is identified as the low quartz (SiO2). FWHM 0.18° was obtained using microcal origin 6.0 and average crystal size 53.37 nm was obtained by applying Scherer equation. SEM results show average grain size of samples which is less than 1μm and maximum to 4μm. Based on EDS result, the main constituent elements are Si 32.86 wt%, Mg 19.40 wt%, and Fe 32.03 wt%, respectively.Penelitian ini bertujuan untuk menyiapkan bubuk slag nikel yang berasal dari furnace, yang dilanjutkan dengan mengidentifikasi dan menganalisis unsur atau paduan yang terkandung di dalamnya. Data diperoleh dengan melakukan analisis terhadap komposisi unsur, fasa mikrostruktur, ukuran Kristal, distribusi dan komposisi paduan dari sampel bubuk slag nikel furnace dengan menggunakan XRD tipe Rigaku Miniflex II dan SEM-EDS tipe Tescan Vega-3. Hasil analisis XRD menunjukkan bahwa formasi yang dihasilkan menyerupai fase amorf dan formasi yang terbentuk pada puncak 2θ = 28.01° diidentifikasi sebagai low quartz (SiO2). Dengan menggunakan microcal origin 6.0 diperoleh FWHM 0.18 ° dan menggunakan persamaan Scherer diperoleh rata-rata ukuran kristal 53.37 nm. Hasil pengukuan SEM menunjukkan bahwa rata-rata ukuran butir dari sampel bubuk slag nikel furnace bervariasi antara minimal 1μm dan maksimum 4 μm. Berdasarkan pengukuran EDS diperoleh secara berturut-turut bahwa unsur utama penyusun paduan slag nikel furnace adalah Si 32.86 wt%, Mg 19.40 wt%, dan Fe 32.03 wt%.
PENGARUH MODEL PEMBELAJARAN DAN PENGETAHUAN AWALTERHADAP KEMAMPUAN MEMECAHKAN MASALAH FISIKAPESERTA DIDIK KELAS XI IPA MAN 2 MODEL MAKASSAR Rufaida, S.; Sujiono, E. H.
Jurnal Pendidikan IPA Indonesia Vol 2, No 2 (2013): October 2013
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v2i2.2718

Abstract

Tujuan penelitian untuk mengetahui pengaruh model pembelajaran dan pengetahuan awal terhadap kemampuan memecahkan masalah Fisika pada kelompok peserta didik yang diajar dengan menggunakan model pembelajaran learning cycle 5E dan problem posin. Penelitian ini merupakan true experiment. Hasil penelitian menunjukkan terdapat perbedaan kemampuan memecahkan masalah pada kelompok peserta didik yang diajar dengan menggunakan model pembelajaran learning cycle 5E dan problem posing. Simpulan yang dapat diambil yaitu terdapat pengaruh model pembelajaran dan pengetahuan awal terhadap kemampuan memecahkan masalah Fisika pada kelompok peserta didik yang diajar dengan menggunakan model pembelajaran learning cycle 5E dan problem posin. Research purposes to determine the effect of early models of learning and knowledge of the physics problem-solving skills in a group of students who were taught using the 5E model of teaching and learning cycle posin problem. This method is true experiment. The results indicate there are differences in the ability to solve problems in a group of students who were taught using the 5E learning cycle model of learning and problem posing. Conclusion can be drawn that there is a model of the influence of prior knowledge on learning and problem-solving skills in physics in the group of students who were taught using the 5E model of teaching and learning cycle posin problem.
KARAKTERISTIK SIFAT FISIS BATUAN NIKEL DI SOROWAKO SULAWESI SELATAN Sujiono, E. H.; Diantoro, M.; -, Samnur
Jurnal Pendidikan Fisika Indonesia Vol 10, No 2 (2014)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v10i2.3452

Abstract

Sulawesi Selatan memiliki cadangan nikel berlimpah di daerah Sorowako, Kabupaten Luwu Timur, yang sampai saat ini masih terikat kontrak karya dengan P.T. Vale Indonesia. Potensi nikel dalam jumlah besar dan terus bertambah sehingga dalam proses produksi dan eksplorasinya harus tepat, ramah lingkungan agar memiliki nilai ekonomi tinggi. Data yang dilaporkan dalam penelitian ini berupa hasil karakterisasi komposisi unsur, senyawa dan kekerasan batuan nikel. Pemilahan dan penyiapan sampel dilakukan secara manual dalam ukuran 2 cm x 2 cm x 0,5 cm. Hasil analisis menunjukkan bahwa komposisi utama dari batuan nikel didominasi oleh nikel (Ni) dan silikon (Si). Kekerasan batuan nikel mencapai 130 sampai 155 HVN-100 serta temperatur transisi gelas pada kisaran 9000C. Berdasarkan data ini, batuan nikel potensial untuk diolah secara industri.ABSTRACTSouth Sulawesi has abundant reserve of nickel in Sorowako, East Luwu, which is still in the status of work contract bond with P.T. Vale, Indonesia. The huge nickel potential of the area and the growing production brings the need to process the exploration precisely and friendly to generate high economic value. The data reported in this study are characterization result of the elements composition, compounds and hardness of the nickel ore. Samples were prepared manually, each in size of 2cm x 2cm x 0,5cm. The analysis showed that the main composition of the nickel ore was dominated by nickel (Ni) and silicon (Si). Nickel ore hardness reaches 130 to 155 HVN-100 as well as the glass transition temperature in the range of 9000C. Based on the data found, the nickel ores are furthermore processable industrially.
PENGARUH MODEL PEMBELAJARAN DAN PENGETAHUAN AWALTERHADAP KEMAMPUAN MEMECAHKAN MASALAH FISIKAPESERTA DIDIK KELAS XI IPA MAN 2 MODEL MAKASSAR Rufaida, S.; Sujiono, E. H.
Jurnal Pendidikan IPA Indonesia Vol 2, No 2 (2013): October 2013
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v2i2.2718

Abstract

Tujuan penelitian untuk mengetahui pengaruh model pembelajaran dan pengetahuan awal terhadap kemampuan memecahkan masalah Fisika pada kelompok peserta didik yang diajar dengan menggunakan model pembelajaran learning cycle 5E dan problem posin. Penelitian ini merupakan true experiment. Hasil penelitian menunjukkan terdapat perbedaan kemampuan memecahkan masalah pada kelompok peserta didik yang diajar dengan menggunakan model pembelajaran learning cycle 5E dan problem posing. Simpulan yang dapat diambil yaitu terdapat pengaruh model pembelajaran dan pengetahuan awal terhadap kemampuan memecahkan masalah Fisika pada kelompok peserta didik yang diajar dengan menggunakan model pembelajaran learning cycle 5E dan problem posin. Research purposes to determine the effect of early models of learning and knowledge of the physics problem-solving skills in a group of students who were taught using the 5E model of teaching and learning cycle posin problem. This method is true experiment. The results indicate there are differences in the ability to solve problems in a group of students who were taught using the 5E learning cycle model of learning and problem posing. Conclusion can be drawn that there is a model of the influence of prior knowledge on learning and problem-solving skills in physics in the group of students who were taught using the 5E model of teaching and learning cycle posin problem.
The Interpreting Ability on Science Kinematics Graphs of Senior High School Students in South Sulawesi, Indonesia Amin, B. D.; Sahib, E. P.; Harianto, Y. I.; Patandean, A. J.; Herman, H.; Sujiono, E. H.
Jurnal Pendidikan IPA Indonesia Vol 9, No 2 (2020): June 2020
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v9i2.23349

Abstract

This research was a descriptive case study. The purpose of this research was to describe the student’s ability to interpret the kinematics graph. The subjects of the study were 347 students of class XI science in the even semester of 2018/2019 in Luwu Raya, South Sulawesi Province, Indonesia. The research data were obtained from multiple-choice test results using instruments adapted from Test of Understanding Graph – Kinematics 2.6 and the results of in-depth interviews to find out the reasons learners choose answers and casual factors. The results of the study based on descriptive data analysis were 90 students or 25.94% in the low category, and 257 students or 74.06% were in the very low category. These results indicate the ability to interpret the graphs of students were still low, with the average achievement in answering questions on each of the highest indicators was 20.99 % on indicators identifying graphs based on the description. While the lowest average achievement was11.91%, which is the indicator to identify the graph that has a different variable. Base on the qualitative data analysis, the results are students had difficulties in solving the test, as follows: a) the difficulty in distinguishing symbol of the variables on the graph, b) the difficulty in determining the formula for solving test in graphical form, c) to determine when the curve on the graph v-t decreases then the object will move with speed slowed. The factors causing these difficulties are because students did not understand deeply about how to read graphs, how to solve test in graphical form, and did not understand the formula used to solve the test.
The Effect of Applying the Ethno-STEM-Project-based Learning Model on Students' Higher-order Thinking Skill and Misconception of Physics Topics Related to Lake Tempe, Indonesia Martawijaya, M. A.; Rahmadhanningsih, S.; Swandi, A.; Hasyim, M.; Sujiono, E. H.
Jurnal Pendidikan IPA Indonesia Vol 12, No 1 (2023): March 2023
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v12i1.38703

Abstract

This study aims to determine the effect of applying the Ethno-STEM-Project Based Learning model about the concept of physics related to Lake Tempe on students’ conceptual understanding of physics, which is characterized by higher-order thinking skills and the level of misconceptions. The sample in this study was eleventh-grade students in senior high school. Students are exposed to local wisdom-based learning strategies integrating science, technology, engineering, and mathematics through group project assignments. Students are given a pre-Achievement Test (PAT) to determine their initial Higher-Order Thinking Skill of physics concepts in everyday life. Then after being treated through project work, they are asked to do a Post-Achievement Test (PAT). A three-tier test was carried out before and after treatment to determine the level of misconceptions. In addition, focus group interviews were conducted with several students to strengthen the pre and post-test results. Student responses to focus group interviews and the PAT’s open-ended questions were analyzed using the N-Gain Score equation. The data in the initial and final tests were analyzed quantitatively and qualitatively. Based on the analysis results, it was found that using the Ethno-STEM-PjBL model affected the understanding of physics concepts. It was marked by increases in higher-order thinking skills and decreases in misconceptions on several physics topics related to students’ activities around Lake Tempe.
Co-Authors A. Zulfi, A. Ali Djamhuri Amin, B. D. Harianto, Y. I. Herman, H. Husain Ahmad, Husain M. A. Martawijaya M. Diantoro M. Hasyim, M. Patandean, A. J. Rahmadhanningsih, S. S. Rufaida Sahib, E. P. Samnur . Swandi, A.