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Jurnal Pendidikan Fisika Indonesia
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Articles 553 Documents
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DEVELOPING SCIENCE LEARNING INSTRUMENTS BASED ON LOCAL WISDOM TO IMPROVE STUDENT’S CRITICAL THINKING SKILLS Wahyuni, S.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.4228

Abstract

This research aims to develop learning instruments of science i.e. textbook, student worksheet, syllabus, and lesson plan based on local wisdom that can improve critical thinking skills of junior high school students. Indicators of student's critical thinking skills include interpretation, analysis, evaluation and inference. This study is a Research and Development by using analysis, desaign, development, implementation and evaluation (ADDIE) method. Expert validation was conducted with the expert test related to the format, content/material, and language. The instruments ware used on the collection data are documentations, validation sheets, observation sheets, and tests. The result of the instrument in the 7th grade of junior high school at Bustanul Ulum Panti Jember showed that there are the improvement of critical thinking skills of student based on the data from test and observation. According to indicator of critical thinking skills, the n-gain value is around 0.47, means moderate interpretation. The conclusions of this research are the learning instruments of science based on local wisdom which develope in the valid category is quite effective to improve students' critical thinking skills.Penelitian ini bertujuan mengembangkan perangkat pembelajaran IPA yang berupa Buku ajar, LKS, Silabus, dan RPP berbasis kearifan lokal untuk meningkatkan kemampuan berpikir kritis siswa SMP. Indikator kemampuan berpikir kritis siswa mencakup interprestasi, analisis, evaluasi dan inferensi. Penelitian ini merupakan penelitian Research and Development dengan metode Analysis, Desaign, Development, Implimentation and Evaluastion (ADDIE). Validasi ahli dilakukan dengan uji expert terkait dengan format, isi/materi, dan bahasa. Instrumen yang digunakan dalam pengambilan data adalah dokumentasi, lembar validasi, lembar observasi, dan tes. Hasil ujicoba instrumen di kelas VII SMP Bustanul ulum Panti Kabupaten Jember menunjukkan adanya peningkatan kemampuan berpikir kritis siswa, baik yang diambil dari teknik tes maupun observasi. Berdasarkan indikator kemampuan berpikir kritis diperoleh nilai rata-rata N gain 0,47 dengan interpretasi sedang. Simpulan penelitian ini menunjukkan perangkat pembelajaran IPA berbasis kearifan lokal yang dikembangkan dalam katagori valid sehingga cukup efektif dalam meningkatkan kemampuan berpikir kritis siswa.
Mapping Students' Problem-Solving Skills in Physics Subject After Inquiry Learning at Class X SMAN 1 Prambanan Putri, R Z; Jumadi, J; Ariswan, A; Kuswanto, H
Jurnal Pendidikan Fisika Indonesia Vol 15, No 2 (2019)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v15i2.15246

Abstract

Problem-solving skills is necessary to be mastered by students to help them in solving the problems of their daily life in the future. The purpose of this study was to map the student problem-solving skills after inquiry learning in Physics subject, impulse, and momentum in class X SMAN 1 Prambanan, Yogyakarta. Experimental research model with one-shot case study design was used in this study. Data collection was performed through essays at the end of the learning process. The results of the mapping show that students have different problem-solving skills levels at each stage. At the stage of problem identification, students were in a very good category. At the stage of planning the problem solution and problem-solving implementation, the students were in a good category, while in results evaluation, the students were in a fairly good category. The result of this study can contribute to giving the point of view to the teacher about students' problem-solving skills level based on the indicators as well as giving the additional information as a literature in the topic of students’ problem-solving skills after inquiry learning.
SOLID WASTE-SILICA COMPOSITE FOR HIGH STRENGTH AND LIGHTWEIGHT MATERIAL APPLICATION Masturi, M.; Rustad, S.; Sunarno, S.; Hindarto, N.
Jurnal Pendidikan Fisika Indonesia Vol 12, No 1 (2016)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v12i1.4289

Abstract

The solid waste composite was successfully made. Preliminary, the composite was synthesized using polyurethane as binder mixed with the solid waste using simple mixing method and then hot-pressed at at pressure of 4 metric-tons and temperature of 100°C for 20 minutes. To enhance its strength, silica nanoparticles with varied content then were added in the polyurethane-solid waste mixture. From the compressive strength test, it was obtained that polyurethane-solid waste composite with solid waste volume fraction of 87.15% had optimum compressive strength of 160 MPa. Meanwhile, for silica addition with the fraction of 0.4975%, the compressive strength became 200 MPa, or increased 23% of that without nanosilica. The enhancement was also briefly confirmed from FTIR Spectroscopy where some polyurethane spectra shifted small due to silica addition, especially in amine and carbonyl groups as its active groups. The strength is better than of brick (80 MPa), shalestone (73 MPa), silstone (92 MPa) and other stones. From density measurement, the composite-produced has density about 0.7 g/cm3 that comparable to Jati (Tectona grandis) and Mahoni (Swietenia macrophylla) having densities about 0.8 g/cm3 and 0.7 g/cm3 respectively. Therefore, this composite is very adequate for building material application to compete the woods.  Komposit sampah sudah berhasil dibuat. Mula-mula, komposit disintesis dengan menggunakan poliuretan sebagai pengikat yang dicampur dengan sampah melalui metode pencamnpuran sederhana (simple mixing), kemudian dihot-press pada tekanan 4 metric ton dan suhu 100°C selama 20 menit. Untuk meningkatkan kekuatan mekaniknya, nanopartikel silica dengan berbagai komposisi ditambahkan dalam campuran poliuretan-sampah. Dengan menggunakan uji kekuatan tekan, didapatkan komposit poliuretan-sampah dengan fraksi volume sampah sebesar 87,15% memiliki kekuatan tekan sebesar 160 MPa. Selanjutnya, dengan penambahan silica sebesar 0,4975% (v/v) kekuatan tekan komposit menjadi 200 MPa, atau meningkat sebesar 23% dibandingkan komposit tanpa silica. Peningkatan ini juga dikonfirmasi melalui FTIR Spectroscopy yang menunjukkan adanya pergeseran kecil pada puncak spektra poliuretan akibat penambahan silica, utamanya pada gugus fungsi amina dan karbonil. Kekuatan mekanik komposit ini lebih baik daripada batu bata (80 MPa), batuan shale (73 MPa), batuan siltstone (92 MPa) dan beberapa jenis batuan yang lain. Dengan menggunakan uji kerapatan didapatkan komposit ini memiliki massa jenis 0,7 g/cm3, setara dengan kayu Jati (Tectona grandis) dan Mahoni (Swietenia macrophylla) yang memiliki massa jenis masing-masing 0,8 g/cm3 dan 0,7 g/cm3. Ini menunjukkan komposit yang dihasilkan sangat cocok untuk diaplikasikan sebagai bahan bangunan pengganti kayu.
IMPLEMENTATION OF GUIDED INQUIRY PHYSICS INSTRUCTION TO INCREASE AN UNDERSTANDING CONCEPT AND TO DEVELOP THE STUDENTS' CHARACTER CONSERVATION Sarwi, S.; Sutardi, S.; Prayitno, W. W.
Jurnal Pendidikan Fisika Indonesia Vol 12, No 1 (2016)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v12i1.4264

Abstract

The Measurement Concepts Instruction (MCI) is carried out by implementation of guided inquiry experiment  model. The objectives is to develop the understanding concept and SMA students' character. The method used experiment educational research, with post- test control group design. The data of the understanding on property and measurement is collected by essay test and an observation sheets for students' character conservation. The subject of tutorial and non tutorial groups consist of 32 students respectively. The data were analyzed by t test and correlation analysis. The results showed a) the positive correlation between students' character and mastery on concept in high category (p = 0.002) and b) students' character conservation is significantly difference between tutorial and non tutorial groups. It can be concluded that the implementation of the guided inquiry experiment model to effective increase the understanding property and measurement and to develop students' character of senior high school students.Pembelajaran Fisika (PF) dilaksanakan melalui implementasi model eksperimen inkuiri terbimbing. Tujuan utama penelitian ini untuk mengungkap konsep besaran dan pengukuran dan mengembangkan nilai karakter konservasi siswa SMA. Metode penelitian ialah eksperimen kependidikan dengan post-test control group design digunakan. Subjek penelitian adalah kelompok perlakuan dengan tutorial dan non tutorial masing-masing 32 siswa. Data penelitian konsep besaran dan pengukuran dan nilai karakter konservasi dikumpulkan dengan tes uraian dan lembar observasi. Data dianalisis menggunakan uji t dan uji korelasi. Hasil penelitian yaitu: a)  ditemukan korelasi positif antara nilai karakter konservasi dan penguasaan konsep besaran dan pengukuran pada kategori tinggi dan sangat signifikan (p = 0,002), dan  b) diperoleh perbedaan penguasaan konsep yang signifikan antara kelompok tutorial dan non tutorial. Simpulan penelitian bahwa implementasi model eksperimen inkuiri terbimbing efektif untuk meningkatkan penguasaan besaran dan pengukuran dan mengembangkan nilai karakter konservasi siswa SMA.
DEVELOPMENT OF PHYSICS STUDENT WORK SHEET (SWS) TO BUILD SCIENCE PROCESS SKILL VALUED CONSERVATION Yulianti, D.; Marfu'ah, S.; Yulianto, A.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.4246

Abstract

Student Work Sheet (SWS) which contains only a summary of the material and exercises does not train students to investigate and develop conservation values. The research objective is to also prepared worksheets guided inquiry that can enhance science process skills, understanding of the concept and develop conservation value. Elements of inquiry and conservation value generated through work instructions and investigation. The study was performed by using one group pretest-posttest design. Research procedures include observation and identification of weaknesses worksheets, planning, early product development and initial field trials. Feasibility and legibility using questionnaires and tests hiatus. The value of understanding the concept derived from the pretest-posttest. Data science process skills gained from the observation during the lesson. Conservation values obtained from the students' self-assessment questionnaire and assessment questionnaire between friends. The analysis showed guided inquiry SWS easy to understand and very fit for use as teaching materials. Test gain showed guided inquiry SWS can enhance science process skills and conceptual understanding, and can be used as a medium to develop conservation value.LKS yang hanya berisi ringkasan materi dan latihan soal tidak melatih siswa melakukan penyelidikan dan mengembangkan nilai konservasi. Tujuan penelitian R&D ini adalah menyususn LKS yang mampu meningkatkan keterampilan proses sains, pemahaman konsep dan nilai konservasi. Nilai konservasi dimunculkan melalui petunjuk kerja dan kegiatan penyelidikan.Ujicoba menggunakanOne Group Pretest-Posttest Design. Prosedur penelitian meliputi observasi dan identifikasi kelemahan LKS, perencanaan, pengembangan produk awal dan uji coba lapangan awal. Uji kelayakan dan keterbacaan menggunakan angket dan tes rumpang. Nilai pemahaman konsep  diperoleh dari pretest-posttest. Data keterampilan proses sains diperoleh dari hasil observasi selama pembelajaran. Nilai konservasi siswa diperoleh dari hasil angket penilaian diri dan angket penilaian antarteman. Hasil analisis menunjukkan LKS mudah dipahami dan sangat layak digunakan sebagai bahan ajar. Uji gain menunjukkan LKS dapat meningkatkan keterampilan proses sains  dan pemahaman konsep, sertadapat digunakan sebagai media untuk mengembangkan nilai konservasi.
Invers Modeling Gravity Data for Semi-Infinite Slab Using Matlab Adhi, A; Sismanto, S; Setiawan, A
Jurnal Pendidikan Fisika Indonesia Vol 15, No 2 (2019)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v15i2.21937

Abstract

Semi-infinite slab modeling has been made through inverse data gravity using Matlab. Inversion of gravity data is done by first determining the simulation data. Forward modeling uses simulation data to produce an initial guess inversion model expressed with parameters n0 (1), n0 (2), n0 (3) and n0 (4). The forward modeling is performed on the next initial guess that the value of the misfit is as small as possible through an iteration using the Jacobian matrix. Accuracy of inversion results is determined by the initial guess and the number of iterations. The results obtained show that inversion modeling is more valid in the inversion modeling process compared to advanced modeling, because the value of the parameters sought is generated from mathematical observations of the observation data. Guesses greatly affect the results of inversions obtained. Initial guesses are given in the form of parameters n0 (1), n0 (2), n0 (3) and n0 (4). The initial guess for the parameters n0 (1), and n0 (2) that are made far deviant does not affect inversion. The initial guess for the parameters n0 (3), and n0 (4) that are made deviating far influences the inversion caused by a very small RCON value so that the result is NAN
STUDENTS’ UNDERSTANDING OF FUNDAMENTAL CONCEPTS OF MECHANICAL WAVE Sutopo, S.
Jurnal Pendidikan Fisika Indonesia Vol 12, No 1 (2016)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v12i1.3804

Abstract

Contrast to force and motion concepts, students’ difficulties related to physics concepts underlying mechanical wave propagation has getting less attention in physics education research. This study exposed common students’ difficulties in solving conceptual problems related to mechanical wave propagation. Subject consisted of 128 first-year students in physics department of UM, enrolling the Introductory Physics II in 2013/2014 academic year. Data was gathered using two-tier, multiple choices test with Confidence Scale Rating. The study concluded that some fundamental concepts of wave such as general mathematical representation of wave propagation, motion of medium particles, and the relationship of v = λf, were not well understood by most students; even many students hold misconceptions. The study suggested further research to explore the causes of student’s difficulties more outentically, for example, using think aloud or clinical interview methods.Kontras dengan topik gaya dan gerak, kesulitan siswa terkait konsep-konsep yang melandasi fenomena perambatan gelombang masih kurang mendapatkan perhatian para peneliti pendidikan fisika. Artikel ini mengangkat kesulitan umum yang dialami mahasiswa dalam memecahkan masalah konseptual terkait fenomena perambatan gelombang. Subjek penelitian terdiri atas 128 mahasiswa tahun pertama jurusan fisika UM yang mengikuti perkuliahan Fisika Dasar II tahun akademik 2013/2014. Analisis didasarkan pada jawaban mahasiswa terhadap soal pilihan ganda dan tingkat keyakinan mahasiswa terhadap ketepatan jawabannya. Penelitian menyimpulkan bahwa konsep-konsep fundamental yang meliputi representasi matematis tentang karakteristik umum gelombang berjalan, gerakan partikel medium saat dilewati gelombang, dan hubungan  belum dipahami dengan baik oleh sebagian besar mahasiswa; bahkan banyak mahasiswa yang terindikasi mengalami miskonsepsi. Disarankan untuk dilakukan penelitian lanjutan untuk mengeksplorasi lebih dalam dan lebih otentik penyebab kesulitan tersebut, misalnya menggunakan teknik think aloud atau interview klinis.
IMPLEMENTASI MODEL PEMBELAJARAN INQUIRY TRAINING DALAM PEMBELAJARAN FISIKA UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR FORMAL SISWA Nasution, D.; Mihardi, S.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i2.4679

Abstract

Low ability of formal thinking students caused the learning outcomes they get too low. This study aims to determine the effectiveness of the inquiry learning model training in improving students' ability to think formal. The design was used quasi-experimental "non-equivalent groups pretest-posttest design". Implementation  experimental class learning with inquiry learning model training, control class learning with direct instruction. Data obtained through a formal thinking ability test thinking ability. Learning model efectivity in improving formal thinking ability is determined based on the gain score average which normalized by average difference test of statistic, namely t test. The results of the reasearch found that the inquiry training learning model is more effective in improving students formal thinking ability compared with the direct instruction learning model. The N-gain percentage of formal thinking ability of students in the experiment class in the indicators of hypothetical deductive thinking, combination thinking and reflection thinking are in the medium category, just proportional thinking is the high category. N-gain average percentage of control class for the hypothesis deductive thinking is just in the low category, while the proportional thinking, combination thinking and reflection thinking are in the medium category.Rendahnya kemampuan berpikir formal siswa menyebabkan hasil belajar yang mereka peroleh juga rendah. Penelitian ini bertujuan untuk mengetahui efektivitas  model pembelajaran inquiry training dalam meningkatkan kemampuan berpikir formal  siswa. Disain yang digunakan adalah kuasi eksperimen “non-equivalent groups pretest-posttest design”. Implementasi pembelajaran kelas eksperimen dibelajarkan dengan model pembelajaran inquiry training, kelas kontrol dengan model pembelajaran direct instruction.  Data kemampuan berpikir formal diperoleh melalui tes kemampuan berpikir formal. Efektivitas  model pembelajaran  dalam meningkatkan kemampuan berpikir formal ditentukan berdasarkan rerata skor gain yang dinormalisasi dengan statistik uji beda rerata, uji t.  Hasil penelitian ditemukan bahwa pembelajaran dengan model inquiry training lebih efektif dalam meningkatkan kemampuan berpikir formal siswa dibandingkan dengan pembelajaran direct instruction. Persentase N-gain kemampuan berpikir formal untuk siswa kelas eksperimen untuk indikator berpikir hipotesis deduktif, berpikir kombinasi dan refleksi berada pada kategori sedang, berpikir proporsional pada kategori tinggi. Untuk siswa kelas kontrol perentase N-gain rata-rata untuk berpikir hipotesis deduktif  berada pada kategori rendah, sementara berpikir proporsional, berpikir kombinasi dan berpikir refleksi berada pada kategori sedang.
Development of Physics Teaching Materials of Optical Devices Based on Learning Assisted Guided Inquiry Crossed Puzzles Rambe, A; Lubis, A M; Aritonang, S
Jurnal Pendidikan Fisika Indonesia Vol 15, No 2 (2019)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v15i2.21649

Abstract

This research aims to produce the teaching materials based on the inquiry learning model with valid, effective, and practical crossword puzzle of a physics lesson, especially in the optical appliance material of junior high school. The type of this research is developmental research using a 4 D model. The 4-D model consists of 4 stages of defining, designing, developing, and distributing. This research uses the development model. The methodology used is quantitative descriptive. Likert scale is used in this research as the validity analysis. Furthermore, the practical analysis is achieved from observation instrumental of lesson plan implementation, which written in the observation sheet, and student and teacher response questionnaire.  The result of the research showed that the validity analysis of teaching material is valid. Moreover, the result of lesson plan implementation, teacher response questionnaire, student response questionnaire, categorized to very practical. The findings of this research showed that inquiry learning with a crossword puzzle in optical appliance material was very valid, practical, and useful.
ZERO-FIELD NUCLEAR MAGNETIC RESONANCE FOR STUDY OF ANTIFERROMAGNETIC PROPERTIES OF FeF3 MATERIALS Suwandi, G. R. F.; Khotimah, S. N.; Haryanto, F.
Jurnal Pendidikan Fisika Indonesia Vol 12, No 1 (2016)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v12i1.3688

Abstract

Nuclear Magnetic Resonance (NMR) has been used as a research tool in many fields. In this study, the magnetic properties, especially anti-ferromagnetic properties of FeF3 materials were investigated. Zero-field custom-built NMR method was used to investigate the anti-ferromagnetic properties in the materials. Experiments have been carried out by varying the sample temperatures from 8 K to 220 K. Ordinary spin echo pulse sequence 90⁰RF–τ–180⁰RF were used. Using Fast Fourier Transform, the signals in NMR spectrum were analyzed and the peak showed the resonance frequency. The result showed that resonance frequencies decrease with increasing in temperature. The frequency of the spectrum was around 85.41 MHz in the zero-temperature limit, and this corresponds with Fe hyperfine field at zero-temperature limit was 2.14 T. The temperature dependence of the local magnetization does not fit T2 Bloch’s Law very well. Instead, it fits the exponential form having an energy gap in the dispersion relation of the spin wave. It is obtained from the result that FeF3 is antiferromagnetic materials with energy gap of 11.466 meV and anisotropy energy of 1.045 meV.Nuclear Magnetic Resonance (NMR) telah banyak digunakan sebagai “research tool” pada berbagai bidang kajian di fisika. Pada studi ini, akan dilakukan eksperimen untuk menguji sifat magnetik, khususnya antiferromagnetik pada material FeF3. Telah dilakukan eksperimen dengan memvariasikan temperatur pada sampel dari 8 K hingga 220 K. Pulse sequence yang digunakan adalah 90⁰RF–τ–180⁰RF. Dengan memanfaatkan Fast Fourier Transform, sinyal echo ini dapat dianalisis dalam bentuk spektrum NMR dengan puncak spektrum menunjukkan frekuensi resonansinya. Diperoleh bahwa frekuensi resonansi akan menurun seiring dengan kenaikan temperatur. Posisi frekuensi pada temperatur 0 K adalah sebesar 85,41 MHz, hal ini memperlihatkan bahwa medan hyperfine dari Fe sebesar 2,14 T pada temperatur 0 K. Kurva antara frekuensi resonansi dengan temperatur menunjukkan bahwa magnetisasi tidak tepat sebanding dengan hukum Bloch T2 namun lebih cocok dengan bentuk persamaan eksponensial yang berkaitan dengan suatu gap energi yang berasal dari dispersi spin wave. Hal ini menguatkan bahwa bahan FeF3 merupakan bahan yang bersifat antiferromagnetik, namun bukan antiferromagnetik sederhana. Berdasarkan fitting, diperoleh gap energi sebesar 11,466 meV dan energi anisotropi sebesar 1,045 meV.

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