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<![CDATA[Sintesis dan Karakterisasi Material Nanokomposit CNT/MnO2 Untuk Aplikasi Material Superkapasitor ]]>
<![CDATA[ Jurnal Pendidikan Fisika Indonesia Vol 10, No 1 (2014) ]]>
Publisher : <![CDATA[Department of Physics, Faculty of Mathematics and Natural Sciences ]]>
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DOI: 10.15294/jpfi.v10i1.3056
<![CDATA[Telah dilakukan fabrikasi material nanokomposit CNT/MnO2 sebagai material elektroda superkapasitor dengan reaksi redox antara CNT dan KMnO4. Variasi komposisi dari kedua bahan tersebut dilakukan untuk mengetahui sifat struktur, morfologi dan kelistrikannya dengan perbandingan massa CNT/MnO2 sebesar 0, 25, 50 dan 75%. Pola struktur kristal dan morfologi dari material serbuk nanokomposit CNT/MnO2 dikarakterisasi dengan X-ray diffraction (XRD), scanning electron microscope (SEM) dan transmission electron microscope (TEM), sedangkan pola ikatannya dikarakterisasi dengan FTIR. Serbuk nanokomposit CNT/MnO2 ini selanjutnya dibuat pellet berbentuk silinder berukuran diameter 1 cm dan ketebalan 2 mm dengan variasi penambahan pengikat polyvinylidene difluoride (PVDF) sebesar 10, 20 dan 30% dari campuran CNT/MnO2. Pellet dari material CNT/MnO2 ini selanjutnya dipanaskan pada temperatur 70 oC selama 1 jam. Hasil pengukuran resistansinya menunjukkan bahwa material CNT/MnO2 dengan perbandingan massa CNT/MnO2 sebesar 75% dan penambahan pengikat PVDF sebesar 20% menunjukkan nilai resistansi yang paling rendah. Selanjutnya prototip superkapasitor CNT/MnO2 dengan menggunakan PVDF sebesar 20% diukur dengan metode electrochemical impedance spectroscopy menghasilkan nilai kapasitansi spesifik sebesar 7,86 F/gr. Nanocomposite materials CNT/MnO2 have been fabricated as candidate of supercapacitor electrode material with a redox reaction between CNT and KMnO4. Variations in the composition of the two materials were carried out to determine the structure, morphology and electrical properties of CNT/MnO2 with mass ratio of 0, 25, 50 and 75 %. Pattern of the crystal structure and morphology of the CNT/MnO2 nanocomposite powder were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM), while the bond pattern was characterized by FTIR. CNT/MnO2 nanocomposite powder was managed to make cylindrical pellets with diameter of 1 cm and thickness of 2 mm with variations addition of binder polyvinylidene difluoride (PVDF) of 10, 20 and 30%. Pellets of the material were then heated at a temperature of 70 oC for 1 hour. Resistance measurement results showed that the ratio of the mass of material CNT/MnO2 by 75% and additions by 20% PVDF binder showed the lowest resistance value. Furthermore, CNT/MnO2 supercapacitor prototype using PVDF of 20% measured with electrochemical impedance spectroscopy method showed specific capacitance of 7.86 F/gr.]]>
<![CDATA[The Influence of Causal Thinking with Scaffolding Type 2A and 2B on Optics Problem-Solving Ability ]]>
<![CDATA[ Jurnal Pendidikan Fisika Indonesia Vol 14, No 2 (2018) ]]>
Publisher : <![CDATA[Department of Physics, Faculty of Mathematics and Natural Sciences ]]>
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DOI: 10.15294/jpfi.v14i2.12185
<![CDATA[The effectiveness of learning is affected by the assistance stages (scaffolding) provided. For example, the scaffolding of type 2a and type 2b supports the causal-thinking approach in learning. The type 2a informs the causal model, number of causes and effect, while 2b informs its argument sample. This research aimed to identify the effect of causal thinking process (CTP) with scaffolding type 2a and 2b on optics problem-solving ability (PSA) of students. The type of the research was quasi-experiment with the non-equivalent-group design. Data were obtained with PSA-test and analyzed with the two-tail test with separated variance formula at significance degree of 5% to determine the effect of each type of the CTP on the PSA, also to determine its difference. The results showed that tcount for each of the first two t-tests were greater than ttable, but tcount for the third one was smaller than its ttable. This research concluded that the implementation of the CTP with the scaffolding of type-2a and 2b were effective to improve the student’s PSA. However, the improvements were not different.Efektivitas pembelajaran dipengaruhi bantuan tahapan (scaffolding) yang diberikan. Dengan pendekatan berpikir kausalitik ini, diperkenalkan scaffolding tipe-2a dan tipe-2b. Kedua scaffolding ini menginformasikan model kausal serta jumlah Cause dan Effect tetapi pada tipe-2b ditambah contoh argumentasinya. Penelitian ini bertujuan mengidentifikasi pengaruh proses-berpikir-kausalitik (PBK) ber-scaffolding tipe-2a dan tipe-2b terhadap kemampuan-pemecahan-masalah (KPM) optik siswa. Jenis penelitian kuasi-eksperimen dengan desain non-equivalent-group. Data diambil menggunakan alat tes-KPM dan dianalisis dengan uji-t dua pihak menggunakan rumus separated varians pada signifikansi 5% untuk mengetahui pengaruh PBK tipe-2a dan 2b terhadap KPM, serta perbedaan kedua pengaruh tersebut. Hasil menunjukkan nilai thitung untuk dua uji-t pertama lebih besar dari tTable terkait tetapi nilai thitung untuk uji ketiga adalah lebih kecil dari tTable-nya. Simpulan penelitian implementasi PBK ber-scaffolding tipe-2a dan 2b masing-masing berpengaruh terhadap peningkatan KPM siswa tetapi kedua pengaruh tersebut tidak berbeda.]]>
<![CDATA[DETERMINANTS FACTORS ANALYSIS OF INDONESIAN STUDENTS’ PHYSICS ACHIEVEMENT IN TIMSS 2011 ]]>
<![CDATA[ Jurnal Pendidikan Fisika Indonesia Vol 13, No 1 (2017) ]]>
Publisher : <![CDATA[Department of Physics, Faculty of Mathematics and Natural Sciences ]]>
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DOI: 10.15294/jpfi.v13i1.8641
<![CDATA[This study aimed to find the structure of the theoretical model that can illustrate the achievements of Indonesian students in the field of physics. This study also examines the variables that directly or indirectly influence the physics achievement of Indonesian students. The data in this study are data of TIMSS 2011 on physics test with population involved were 4572 Indonesian students grade 8. This research used path analysis from LISREL 8.30. The physics achievement model of Indonesian students based on TIMSS 2011 results are as follows: (1) physics achievement is directly influenced by self-confidence, interest in learning, and students 'attitudes toward the importance of physics; (2) physics achievement indirectly influenced by students' involvement in physics learning indicated from their interest and confidence in physics learning; (3) attitudes toward the importance of physics have an indirectly positive impact on physics achievement. Students' self-confidence in physics learning has a stronger direct influence on their achievements than their interest in physics.]]>
<![CDATA[APPLICATION OF VERTICAL GRADIENT METHODS OF MICROGRAVITY TIME FUNCTION TO DETERMINE GROUND WATER REDUCTION IN SEMARANG PERIOD OF 2013 ]]>
<![CDATA[ Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015) ]]>
Publisher : <![CDATA[Department of Physics, Faculty of Mathematics and Natural Sciences ]]>
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DOI: 10.15294/jpfi.v11i2.3267
<![CDATA[The development of Semarang city requires the availability of water for daily use and industry in line with population growth. Uncontrolled use of water will damage the groundwater system. The purpose of this study was to determine the zone of the decrease of water level to obtain information about area that utilizes excess water. The method used is a micro-gravity vertical gradient between times. Gravity measurements were done at 124 points spread evenly between May and October 2013. The results showed that there was a decrease in ground water level in the Industries area Kaligawe, Tanah Mas, and Tlogosori which was identified with the vertical gradient anomaly of micro gravity between the times from May to October 2013. The regions which have high negative changes in ground water level (1.2-1.4 m / year) were the monitoring wells Madukoro 2, LIK Kaligawe and PT Aquaria which are the industrial areas. Exploitation of ground water in industrial areas is relatively high compared to the other regions.Perkembangan kota Semarang yang menuntut ketersediaan air untuk keperluan sehari-hari dan industri seiring dengan pertambahan jumlah penduduk. Pemanfaatan air yang tidak terkendali akan menyebabkan sistem air tanah rusak. Tujuan penelitian ini adalah menentukan zona penurunan muka air tanah untuk memperoleh informasi daerah yang memanfaatkan air secara berlebihan. Metode yang digunakan adalah gradien vertikal gaya berat mikro antar waktu. Pengukuran gaya berat di lakukan di 124 titik yang tersebar merata pada periode Mei dan Oktober 2013. Hasil peneltian menunjukkan telah terjadi penurunan muka air tanah di lingkungan Industri Kecil Kaligawe, perumahan Tanah Mas, Perumahan Tlogosori yang ditandai dengan anomali gradien vertikal gaya berat mikro antar waktu Mei-Oktober 2013. Wilayah yang memiliki perubahan muka air tanah negative tinggi (1,2-1,4 m/tahun), berada di sekitar sumur pantau Madukoro 2, LIK Kaligawe dan PT Aquaria dimana tutupan lahan di sekitar sumur pantau tersebut merupakan kawasan industri. Eksploitasi air tanah pada kawasan industri relatif tinggi jika dibandingkan dengan kawasan lainnya. ]]>
<![CDATA[SIKLUS PRAPEMBELAJARAN MODEL PENILAIAN FORMATIF WEB-BASED PADA PEMBELAJARAN FISIKA MATERI SUHU DAN KALOR UNTUK SISWA SMK KELAS X ]]>
<![CDATA[ Jurnal Pendidikan Fisika Indonesia Vol 12, No 2 (2016) ]]>
Publisher : <![CDATA[Department of Physics, Faculty of Mathematics and Natural Sciences ]]>
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DOI: 10.15294/jpfi.v12i2.5906
<![CDATA[Model penilaian formatif Web-based dibagi menjadi tiga siklus yaitu siklus prapembelajaran, siklus pembelajaran dan siklus pascapembelajaran. Penelitian kali ini mengembangkan siklus prapembelajaran model penilaian web-based pada mata pelajaran fisika materi suhu dan kalor untuk siswa SMK kelas X. Metode penelitian yang digunakan dalam penelitian ini adalah penelitian dan pengembangan. Langkah-langkah yang digunakan untuk pengembangan siklus prapembelajaran model penilaian formatif web-based yaitu 1) mengumpulkan informasi, 2) melakukan perencanaan, 3) mengembangkan bentuk produk awal, 4) melakukan uji permulaan, 5) revisi, dan 6) Uji coba. Berdasarkan hasil uji coba, ditemukan bahwa siklus prapembelajaran model penilaian formatif web-based dapat membantu guru dan siswa untuk mendapatkan umpan balik yang cepat. Umpan balik yang cepat dapat membantu siswa untuk mendapatkan pemahaman konsep dengan cepat dan dapat membantu guru untuk menemukan masalah siswa sehingga dapat dipecahkan dengan cepat.Web-based Formative Assessment Model is divided into three cycles: pre-teaching, whilst teaching, post-teaching. This research develops Pre-teaching Cycle of Formative Web-Based Assessment Model on physics material teaching: Temperature and Heat for X Grader of Vocational High School Students. The method used in this research is a Research and Development (R D). The steps used for the development of pre-learning cycle of web-based formative assessment models: 1) collecting information, 2) conducting planning, 3) developing pre-product form, 4) conducting pre-test, 5) revision, 6) trial test. Based on the trial test, the findings show that pre-teaching cycle of formative web-based assessment model is able to assist teachers and students to get fast feedback. Fast feedback can helps students to gain fast conceptual comprehension and help teachers to find out the students’ problems so it enables to solve faster.]]>
<![CDATA[THE APPLICATION OF AUTHENTIC ASSESSMENT WITH FEEDBACK TO IMPROVE THE COMPETENCE OF MTS 2 BANDUNG STUDENTS IN CONSTRUCTING A SCIENTIFIC REPORT OF MOTION MATERIAL IN SCIENCE LEARNING ]]>
<![CDATA[ Jurnal Pendidikan Fisika Indonesia Vol 11, No 2 (2015) ]]>
Publisher : <![CDATA[Department of Physics, Faculty of Mathematics and Natural Sciences ]]>
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DOI: 10.15294/jpfi.v11i2.4227
<![CDATA[This research was carried out to describe the application of authentic assessment with feedback in science learning of motion material which can increase the grade VIII G MTs Negeri 2 Kota Bandung students’ ability of making scientific reports and to analyse the increase. This classroom action research was performed at Madrasah Tsanawiyah Negeri 2 Kota Bandung in the even semester 2014/2015 academic year with 35 students consisting of 18 boys and 17 girls as the subjects. The success indicator of the research was a minimum of 80% of the students were able to make scientific reports in good category (with minimum score of 80). The result showed that the application of the authentic assessment with the feedback increased the ability of students of MTs Negeri 2 Kota Bandung in writing the scientific reports. There was an increase of students’ ability in writing the scientific reports from the first cycle to the second one. Initially, 14% of the students got good category in the first cycle. This number increased, then, to 83% in the second cycle. Penelitian ini dilakukan untuk mendeskripsikan penerapan penilaian otentik dengan feedback dalam pembelajaran IPA materi gerak yang dapat meningkatkan kemampuan menulis laporan ilmiah dan menganalisis peningkatan kemampuan menulis laporan ilmiah siswa kelas VIII G MTs Negeri 2 Kota Bandung. Penelitian yang dilakukan merupakan penelitian tindakan kelas. Subjek penelitian adalah 35 orang siswa kelas VIII G yang terdiri dari 18 laki-laki dan 17 perempuan. Tempat penelitian dilaksanakan di Madrasah Tsanawiyah Negeri 2 Kota Bandung pada semester genap tahun pelajaran 2014/2015. Indikator keberhasilan dari penelitian tindakan kelas yang dilakukan adalah minimal 80% dari siswa memiliki kemampuan menulis laporan ilmiah dalam kategori baik (dengan skor minimal 80). Hasil penelitian menunjukkan bahwa kami telah berhasil menerapkan penilaian otentik dengan feedback yang dilakukan guru dalam pembelajaran IPA materi gerak untuk meningkatkan kemampuan siswa MTsN 2 Bandung dalam menyusun laporan ilmiah. Kemampuan menulis laporan ilmiah siswa mengalami peningkatan siklus I ke siklus II yang semula sebesar 14 % menjadi 83 % jumlah siswa yang berkategori baik.]]>
<![CDATA[Pre-Service Science Teachers’ Skills to Express The Algorithms Used in Solving Physics Problems with Flowcharts (An Example From Turkey) ]]>
<![CDATA[ Jurnal Pendidikan Fisika Indonesia Vol 16, No 1 (2020) ]]>
Publisher : <![CDATA[Department of Physics, Faculty of Mathematics and Natural Sciences ]]>
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DOI: 10.15294/jpfi.v16i1.21371
<![CDATA[Due to the nature of physics, problem-solving strategies are applied in some cases to teach many subjects. Problem-solving is a process that individuals use, not only in physics classes but also in every stage of life. An algorithm is a pathway to solving a problem or achieving a specific purpose. The purpose of this study is to identify how pre-service science teachers express the algorithms they utilize in the process of solving physics problems. The research design of the study was determined as survey design which is one of the quantitative research methods. The study was carried out with the number of 34 pre-service science teachers consisting of 1st and 3rd-year university students who took General Physics I and General Physics Lab I courses in the undergraduate program in science education at a state university. They were given three problems regarding classical mechanics and then asked to solve these problems and schematize their algorithms by using flowcharts. The International System of Units (SI) was used throughout the research. An evaluation was made by comparing the 3 algorithms of the solution, whose reliability and validity was ensured, and which was previously created with the help of 3 experts. In the study, descriptive survey model was used. Frequency tables were frequently used in the analysis of the data with the intent to present the study in the best way by doing an in-depth analysis. In the findings of the research, it was observed that pre-service science teachers had problems in expressing their algorithms and some of them could not express these algorithms at all. It was also observed that pre-service science teachers had difficulty describing the solutions they created while setting up the problem. However, it was observed that preservice science teachers who could illustrate their algorithms well were usually the ones who solved the problems correctly.]]>
<![CDATA[Penerapan Model Pembelajaran Conceptual Understanding Procedures untuk Meningkatkan Curiosty dan Pemahaman Konsep Siswa ]]>
<![CDATA[ Jurnal Pendidikan Fisika Indonesia Vol 10, No 1 (2014) ]]>
Publisher : <![CDATA[Department of Physics, Faculty of Mathematics and Natural Sciences ]]>
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DOI: 10.15294/jpfi.v10i1.3047
<![CDATA[Penelitian ini bertujuan untuk mengetahui keefektifan model pembelajaran Conceptual Understanding Procedures (CUPs) serta meningkatkan pemahaman konsep dan curiosity siswa pada pelajaran fisika. Penelitian ini merupakan penelitian eksperimen, dengan desain kelompok eksperimen dan kelompok kontrol, menggunakan metode eksperimen, pretest-posttest control group design. Untuk mengetahui peningkatan pemahaman konsep dan curiosity digunakan tes, angket, dan observasi. Uji gain untuk mengetahui peningkatan pemahaman konsep dan peningkatan curiosity, uji-t satu pihak (pihak kiri) untuk menguji keefektifan model pembelajaran CUPs. Hasil penelitian menunjukkan peningkatan pemahaman konsep pada kelas eksperimen diperoleh sebesar 0,67 dan kelas kontrol sebesar 0,58. Peningkatan curiosity pada kelas eksperimen diperoleh sebesar 0,21 dan kelas kontrol sebesar 0,20, dan dapat disimpulkan bahwa model pembelajaran CUPs terbukti lebih efektif untuk meningkatkan pemahaman konsep dan curiosity siswa pada pelajaran fisika. The purposes of this research were to determine effectiveness of Conceptual Understanding Procedures (CUPs) in enhancing students’ conceptual understanding and curiosity in physics. This research used experimental method by conducting pretest-posttest control group design. The data were obtained by using paper and pencil test, questionnaires, and observations to determine students’ improvement in understanding the concept and curiosity. Therefore, the data were analyzed by using gain test and t-test. The obtained gain of conceptual understanding in experiment group was 0.68 and control group was 0.58. Meanwhile, the obtained gain of curiosity in experiment group was 0.21 and control group was 0.20. The result of hypothesis testing about students’ improvement of conceptual understanding and curiosity showed that Ho was accepted and Ha was rejected. Based on data analysis, it can be inferred that the CUPs is more effective in improving students' understanding of concepts and curiosity in physics.]]>
<![CDATA[Pre-service Physics Teachers’ Knowledge, Decision Making, and Self-system Toward Energy Conservation ]]>
<![CDATA[ Jurnal Pendidikan Fisika Indonesia Vol 14, No 2 (2018) ]]>
Publisher : <![CDATA[Department of Physics, Faculty of Mathematics and Natural Sciences ]]>
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DOI: 10.15294/jpfi.v14i2.16638
<![CDATA[Along with the increase of world’s energy need in one hand and of the impact of its uses in the other hand, conservation is indispensable. This paper describes pre-service physics teachers’ knowledge about energy conservation, how they use their knowledge to make energy-related decisions, and how their self-system toward energy conservation. The data presented here are from selected items of a field test of instrument intended to measure energy literacy that involved 123 pre-service physics teachers from three state universities in Indonesia. They are one state university in South Sumatera and two state universities in West Java. Data from this survey study were analyzed qualitatively. Results showed that pre-service physics teachers were still lack of knowledge and knowledge utilization to make energy-related decision. However, they showed a tendency to engage in energy conservation efforts.Seiring meningkatnya kebutuhan energi dunia di satu sisi dan dampak penggunaannya di sisi lain, konservasi menjadi sangat penting. Artikel ini menggambarkan pengetahuan mahasiswa calon guru fisika tentang konservasi energi, bagaimana mereka menggunakan pengetahuan tersebut untuk mengambil keputusan, dan bagaimana self-system mereka terkait konservasi energi. Data diperoleh dari uji lapangan terhadap instrumen yang ditujukan untuk mengukur literasi energi yang melibatkan 123 mahasiswa calon guru fisika dari tiga perguruan tinggi negeri di Indonesia. Ketiga universitas negeri tersebut adalah satu berada di Sumatera Selatan, dan dua berada di Jawa Barat. Data dari penelitan survey ini dianalisis secara kualitatif. Hasil analisis menunjukkan mahasiswa calon guru fisika kurang dalam pengetahuan dan penggunaan pengetahuan untuk membuat keputusan terkait energi. Namun demikian, mereka menunjukkan kecenderungan untuk terlibat dalam upaya konservasi energi.]]>
<![CDATA[IMPROVING CONCEPT MAPPING SKILL THROUGH INQUIRY INSTRUCTION ]]>
<![CDATA[ Jurnal Pendidikan Fisika Indonesia Vol 12, No 2 (2016) ]]>
Publisher : <![CDATA[Department of Physics, Faculty of Mathematics and Natural Sciences ]]>
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DOI: 10.15294/jpfi.v12i2.7504
<![CDATA[The purpose of this research was to analyze implementation of inquiry instruction for improving concept mapping skill. The subject of the research was student on grade 10 in islamic senior high school in subang district. Method of research used was quasy experiment with matching control group pretest-posttest design. Instruments used in this research were test and concept map about electricity. The treatment of experiment group was the combination of virtual-real experiment and virtual experiment, while control group was only real experiment method. The result of analyzing data showed that the average of normalized gain g was in low criteria. Significant test of three averages normalized gain using analysis of varians (anova) showed that virtual-real experiment method was more significant in improving mapping concept skill than those virtual experiment and real experiment only.Penelitian ini bertujuan untuk menganalisis penerapan pembelajaran inkuiri dalam meningkatkan ketrampilan membuat peta konsep. Subjek penelitian yang digunakan adalah siswa kelas X pada salah satu Sekolah Menengah Atas Islam Terpadu di Kabupaten Subang. Metode penelitian yang digunakan adalah Quasy experiment dengan desain penelitian matching control group pretest-posttest. Instrumen yang digunakan dalam penelitian ini adalah tes dan peta konsep mengenai kelistrikan. Kelas eksperimen dalam penelitian ini memperoleh perlakuan kombinasi metode eksperimen nyata-virtual dan virtual saja, sedangkan kelas kontrol memperoleh perlakuan metode eksperimen nyata saja. Hasil perhitungan rataan gain g yang ternormalisasi menunjukkan bahwa peningkatan kemampuan membuat peta konsep berada pada kriteria rendah. Hasil uji signifikansi ketiga rataan g menggunakan analysis of varians (ANOVA) menunjukkan bahwa metode eksperimen nyata-virtual lebih signifikan dalam meningkatkan keterampilan membuat peta konsep dibandingkan dengan metode eksperimen virtual saja dan nyata saja.]]>
