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INDONESIA
Jurnal Pendidikan Fisika Indonesia
Published by Universitas Negeri Semarang
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Education,
Education Physics
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Articles 553 Documents
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Kajian Fisika Aliran Material Granular Dedak Gandum Di Dalam Saluran Microfluidic -, A. Perima; Wijaya, I P. M.; Suharnoto, Y.; Widyarti, M.
Jurnal Pendidikan Fisika Indonesia Vol 10, No 1 (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.v10i1.3053

Abstract

Perkembangan teknologi mikroelektronik telah melahirkan suatu cabang ilmu baru yaitu microfluidics. Teknologi ini dapat memanipulasi instrumentasi laboratorium menjadi satu chip. Proses pembuatan chip diawali dengan pembuatan mask kemudian dilanjutkan dengan pencetakan master untuk kemudian dituangkan larutan Polydimethil siloxane (PDMS) dan diikatkan dengan kaca melalui teknologi plasma. Kemudian setelah chip dibuat, dilakukanuji microfluidics dengan melewatkan campuran material granular dedak gandum dan air di dalam saluran chip tersebut dengan kecepatan 5,000 μl/jam dan pola aliran direkam dengan menggunakan kamera kecepatan tinggi. Dari hasil rekaman, gambar dianalisis dengan menggunakan persamaan Navier-Stokes dan dilakukan simulasi untuk dapat menduga pola aliran yang terjadi di dalam saluran.Kesimpulan yang didapatkan menunjukkan bahwa aliran fluida yang diperoleh bersifat non-newtonian, dan partikel dedak gandum memiliki sifat tabrakan inleastik. The development of microelectronic technology leads to a new technology branch, namely microfluidics. This technology can manipulate a complicated laboratory instrument into a single chip. The process of making chip starts with making mask, molding a master, pouring of Polydimethilsiloxane (PDMS) into the master, and then making the bonding between the PDMS and glass by using plasma technology. The next step is microfluidics testing by passing the mixing of granular material wheatbran and dionized water through the chip’s channel with the speed of 5,000 μl/hour, and recording the flow of fluid by using high speed camera. The result was then analyzed by Navier-Stokes equation and employed the simulation to predict the flow inside the chip. It can be concluded that the characteristics of fluid’s flow found are non-newtonian fluid and the wheatbran particle has inelastic collision.
DEVELOPMENT OF SCIENCE TEXTBOOK BASED ON SCIENTIFIC LITERACY FOR SECONDARY SCHOOL Rusilowati, A.; Nugroho, S. E.; Susilowati, S. M.
Jurnal Pendidikan Fisika Indonesia Vol 12, No 2 (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.v12i2.4252

Abstract

The purpose of this research is to develop scientific literacy-based science text books and to determine the characteristics, validity, readability, as well as the effectiveness of the textbooks.The study started with product development and then continued by feasibility test and readability test. Feasibility test was done with the respondent of lecturer and science teachers of VII, VIII, IX grade at SMP N at Central Java. Readability test used cloze test that filled by VII, VIII, and IX grade students at that schools. The data analysis was done with percentage discription and t-test. The study results in feasibility test showed that the developed literacy science textbook has average score 90,74%. It means the literacy science textbook is suitable. Based on the readability test result, science literacy textbook is easy to learn. The average of score of cloze test was 88,14%. The effectiveness of the developed science textbook was classified as an effective stimulant to increase students’ scientific literacy.Tujuan penelitian ini adalah mengembangkan buku ajar IPA berbasis literasi sains, menentukan karakteristik, kevalidannya, tingkat keterbacaan, dan keefektifannya. Penelitian pengembangan ini dimulai dengan analisis kebutuhan, penyusunan tema, pengembangan buku ajar, uji kevalidan dan keterbacaan buku yang telah dikembangkan. Validasi dilakukan oleh dosen dan guru IPA kelas VII, VII, IX. Uji validitas, tingkat keterbacaan dan keefektifan buku dilakukan di SMP N di Jawa Tengah. Subjek ujicoba adalah siswa kelas VII, VIII, IX. Teknik analisis data menggunakan deskriptif persentase untuk uji kevalidan dan keterbacaan, dan uji t untuk keefektifan. Hasil validasi menunjukkan seluruh buku yang dikembangkan adalah valid dengan rata-rata skor 90,74% berada pada kategori sangat valid. Skor rata-rata tingkat keterbacaan sebesar 88,14% beradapada kategori mudah dipahami. Buku ajar yang dikembangkan efektif untuk meningkatkan kemampuan literasi sains.
OPTICAL ILLUSION DESIGN BASED ON FOUR CONVEX LENSES SYSTEM AND CLOAKING AREA CHARACTERIZATION Sugiarto, I. T.; Birowosuto, M. D.; Isnaeni, I.; Tresna, W. P.
Jurnal Pendidikan Fisika Indonesia Vol 14, No 1 (2018)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v14i1.5508

Abstract

A set up of optical illusion based on 4f system and characterization of cloaking area have been carried out. The cloaking area is an area where the object is placed on the area as if it disappears from view; the set-up of cloaking area is located at the top of the third lens. The distance between the lens and the cloaking, which is generated from 4f system, depends on the size of the focal point and the size of the lens used. The larger the focal point of the lens used the wider the distance between the lenses and the larger the size of the diameter of the lens, the cloaking range will be increasingly wide, and vice versa. From the experimental results that we obtained that the cloaking area for set up using FL (focusing lens) 100, 50, 50 and 100 mm with a diameter of 3.6 cm lens is ± 2 cm, whereas for the set up using lens FL 150, 100, 100 and 150 mm with lens diameter 2.54 cm is ± 1 cm.
PERCOBAAN GRAVITY CURRENT UNTUK MENGUJI KONSEP HIDRODINAMIKA DAN HUKUM KEKEKALAN MASSA PADA FLUIDA INKOMPRESIBEL EXPERIMENTS ON GRAVITY CURRENT TO EXAMINE CONCEPTS OF HYDRODYNAMICS AND MASS CONSERVATION FOR INCOMPRESSIBLE FLUIDS Prastowo, T.; Ain, T. N.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 1 (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.v11i1.4006

Abstract

Konsep hidrodinamika membicarakan sistem fisis berupa fluida yang mengalir. Fenomena alam yang berkaitan dengan konsep hidrodinamika adalah penetrasi air laut ke daratan dan limbah aliran sungai ke pantai pada arah yang berlawanan di estuari (tempat pertemuan antara air laut dan air sungai). Fenomena ini dapat dipelajari melalui percobaan gravity current di laboratorium sebagai sistem dua fluida dengan beda kerapatan. Tujuan penelitian adalah membuktikan perbedaan kerapatan sebagai gaya penggerak internal sistem tersebut dan keberlakuan kekekalan massa pada fluida inkompresibel (tidak mampu mampat). Serangkaian percobaan dilakukan dengan variasi perbedaan kerapatan dan ketinggian permukaan air dalam tangki. Hasil-hasil percobaan menunjukkan bahwa perbedaan kerapatan merupakan penyebab gerak sistem. Kecepatan tak-berdimensi gravity currrent dalam percobaan ditemukan sebesar 0,45 ± 0,02 menunjukkan pengaruh friksi adalah kecil sepanjang perambatan gravity currrent dalam tangki. Perubahan volume terukur relatif terhadap volume awal hanya 0,4% menunjukkan volume dan massa sistem adalah kekal sesuai dengan teori fisika untuk fluida inkompresibel. The concept of hydrodynamics involves moving fluids. Relevant natural phenomena are seawater intruding to the land and a river discharge flowing to the ocean in the opposite direction in estuaries. These can be examined using laboratory experiments on gravity current as a system of two fluids of different  densities. The aims of this research are to prove that the density difference is internal driving force for the current and that mass is conserved for incompressible fluids. A number of runs were performed by varying the density difference and the surface height in the reservoirs. The results show that the density difference is a source for the horizontal motion of the current. The non-dimensional current speed is 0,45 ± 0,02 implying that friction is small along the propagation of the current. In all runs, a small fraction of only 0,4% is accounted for the change in water volume indicating that volume and mass are conserved for incompressible fluids. 
Pengaruh Advance Organizer Berbasis Proyek Terhadap Kemampuan Analisis – Sintesis Siswa -, Tasiwan; Nugroho, S.E.; -, Hartono
Jurnal Pendidikan Fisika Indonesia Vol 10, No 1 (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.v10i1.3044

Abstract

Penelitian ini dilakukan untuk mengetahui pengaruh model pengatur kemajuan (advance organizer) berbasis proyek terhadap kemampuan analisis – sintesis siswa pada konsep Energi. Sebelum pembelajaran, diberikan tugas proyek pada siswa untuk merealisasikan bel listrik sederhana, rangkaian arus seri - paralel, dan tuas. Produk proyek digunakan sebagai advance organizer dalam pembelajaran di kelas. Penguatan kognitif dilakukan melalui diskusi kelompok dan pembuatan peta konsep, ekspositori guru di kelas, dan kegiatan eksperimen laboratorium. Data diambil melalui pretest, post test, observasi partisipatif pembelajaran oleh dua orang observer, penilaian produk, peta konsep dan laporan kegiatan eksperimen. Teknik analisis data meliputi uji prasyarat data dan uji hipotesis Hasil penelitian menunjukkan bahwa siswa mengalami peningkatan kemampuan analisis – sintesis dalam aspek menguraikan, mengkategorikan, mengidentifikasi, merumuskan pernyataan, merekonstruksi, menentukan konsep, dan menganalisis konsep dengan rata – rata peningkatan delta skor sebesar 54,46 %, uji t sebesar 6,4, dan skala gain sebesar 0,3. This study was conducted to determine the effect of project-based advance organizer model on student’s analysis - synthesis ability of the energy concept. Students were given an assignment to realize the project on simple electric bell, the series – parallel circuit, and lever, before learning. The products of project were used as an advanced organizer in the learning activity. Cognitive strengthening was done through group discussions and concept mapping, expository learning in the classroom, and laboratory experiments activities. The data were taken through a pretest, post-test, participant observation study by two observers, product assessment, concept maps and report of experiment activities. Results showed that the students’ analysis - synthesis ability increased in the aspect of describing, categorizing, identifying, statement formulating, reconstructing, concept determining, and analyzing the concept. The average increase in delta score was 54.46 %, while the t-test score was of 6.4 and a gain scale of 0.3.
TSUNAMI-MAGNETIC SIGNALS AND MAGNETIC ANOMALY GENERATED BY TSUNAMI WAVE PROPAGATION AT OPEN SEAS Prastowo, T.; Cholifah, L.; Ngkoimani, L. O.; Safiuddin, L. O.
Jurnal Pendidikan Fisika Indonesia Vol 13, No 1 (2017)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v13i1.7822

Abstract

This research examines the generation of tsunami-induced magnetic signals, where local magnetic anomaly were measured as variations in the vertical bz and horizontal bH components of the secondary field. The maximum amplitudes of bz and bH were analytically estimated and compared to magnetogram provided by INTERMAGNET and BCMT for the 2010 Chilean, the 2011 Tohoku, the 2010 Mentawai and the 2004 Aceh tsunamis. For the first two cases, frozen-flux theory was used to estimate bz and bH where the phase lag between bz and bH was ?/2, relevant to time interval of T/4 between the two signals. For the Mentawai case, oceanic diffusion was unignored and bz significantly deviated from that calculated using the theory. However, the data from Mentawai where bz ? 2 nT were in good agreement with bz generated by large tsunamis occurring in regions near the equator and with magnetogram from the Aceh event.
DESIGN OF ELECTROPHORESIS DEVICE FOR OPTIMATION OF DNA VISUALIZATION AND DNA CONCENTRATION USING SOFTWARE Kusumaningrum, H.P.; Budi, W. S.; Azam, M.; Bawono, A.
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.v10i2.3456

Abstract

Molekul DNA menunjukkan polarisasi yang kuat sehingga memungkinkan baik gerak elektroforesis berdasarkan muatan negatifnya maupun gerak dielektroforesis berdasarkan induksi polarisasi. Perancangan alat menggunakan kombinasi prinsip elektroforesis dan dielektroforesis dilengkapi perangkat lunak untuk mengukur konsentrasinya sangat diperlukan. Utamanya mengingat uji kualitatif DNA berbasis visualisasi pada gel elektroforesis bersifat sangat subyektif dan kurang terukur. Pengukuran konsentrasi DNA menggunakan spektrofotometer UV/VIS sangat tergantung oleh ketersediaannya di laboratorium. Penelitian bertujuan untuk mendesain piranti untuk mengukur konsentrasi DNA berdasarkan visualisasinya pada gel elektroforesis menggunakan perangkat lunak berbasis MatLab. Pengukuran konsentrasi DNA didasarkan visualisasinya pada gel elektroforesis lalu dibandingkan dengan hasil penghitungan spektrofotometer UV/VIS. Hasil penelitian menggunakan piranti tersebut memperlihatkan visualisasi DNA yang lebih optimal. Hasil pengukuran jumlah DNA menggunakan spektrofotometer memiliki kecenderungan yang sama dengan hasil pengukuran menggunakan perangkat lunak berbasis MatLab meskipun terdapat perbedaan nilai kuantitatif.ABSTRACTMolecules of deoxyribo nucleic acid (DNA) show a strong polarization allowing for both motions of the dielectrophoresis induced by polarization and electrophoresis based on its negative charge. Considering high subjective and less quantifiable result of the visualization based qualitative test of DNA on gel electrophoresis, designing the tool using a combination of the principles of electrophoresis and dielectrophoresis completed with a software for optimization of DNA visualization and to measure the concentration of small and large–sized DNA fragment is very needed. Accuracy of measurement of DNA concentration using a spectrophotometer UV /VIS is depend on its availability in the laboratory. The aim of this study was to design device for optimization of DNA visualization and measuring the concentration in the gel electrophoresis using MatLab- based software. Experiment using this software measured the concentration of DNA based on its visualization and compared it with calculation obtained from spectrophotometer UV/VIS. The research results showed that the amount of DNA analysed using a spectrophotometer tend to similar with the measurement results using the MatLab-based software although there was differences in quantitative values.
Pre-service Physics Teachers’ Knowledge, Decision Making, and Self-system Toward Energy Conservation Yusup, M.; Setiawan, A.; Rustaman, N.Y.; Kaniawati, I.
Jurnal Pendidikan Fisika Indonesia Vol 14, No 2 (2018)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v14i2.16638

Abstract

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.
Seismic Hazard and Microzonation Study of Tanjung Region, North Lombok (Indonesia) using Microtremor Measurement Syamsuddin, S.; Ashari, I.; Adhi, M. A.
Jurnal Pendidikan Fisika Indonesia Vol 14, No 2 (2018)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v14i2.9919

Abstract

Tanjung Region is one of the severely damaged areas by the Lombok earthquake on June 22, 2013. Therefore, to anticipate the similar events, it is necessary to perform microzonation in this region. Objective of this study is to map the distribution of the physical quantities related to the vulnerability of area included the frequency characteristics, amplification factor, and soil vulnerability index. The results showed that the value of the resonant frequency in this region ranged from 0.401 to 16.92 Hz. In general, the lower frequency was 0.40 to 5.91 Hz contained 87 data (71%) were located in the north of the region, which meant that that area has a high vulnerability. While based on the H/V amplitude and vulnerability index, the zone that suffered severe damage on the earthquake of June 22, 2013, showed a different uncertainty of amplification and vulnerability index value.Wilayah Tanjung adalah salah satu daerah yang mengalami rusak parah akibat gempa Lombok pada tanggal 22 Juni 2013. Oleh karena itu, untuk mengantisipasi kejadian serupa, maka perlu untuk melakukan mikrozonasi di daerah tersebut. Tujuan dari penelitian ini adalah untuk memetakan distribusi besaran fisis yang terkait dengan kerentanan suatu daerah terhadap gempa bumi yang meliputi frekuensi respon, amplitudo getaran tanah dan indeks kerentanan tanah. Hasil penelitian menunjukkan bahwa nilai frekuensi resonansi di wilayah ini berkisar antara 0,401-16,92 Hz. Secara umum, frekuensi respon di daerah ini rendah yaitu 0,40-5,91 Hz dengan jumlah 87 data (71%) yang terletak di utara dari wilayah tersebut, yang berarti bahwa bagian utara wilayah memiliki kerentanan yang tinggi. Meskipun berdasarkan nilai amplitudo H/V dan indeks kerentanan, daerah yang mengalami kerusakan parah saat gempa 22 Juni 2013 menunjukkan pola amplifikasi dan indeks kerentanan yang sangat tidak biasa.
The Effectiveness of Basic Physics Experiment Module Based on Guided Inquiry Model in Improving Hard Skills and Soft Skills of Prospective Physics Teachers Suprianto, S.; Kholida, S. I.; Andi, H. J.; Mahardika, I. K.
Jurnal Pendidikan Fisika Indonesia Vol 14, No 2 (2018)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v14i2.11579

Abstract

The purpose of this research is to identify the effectiveness of the first basic physics practice module based on guided inquiry on improving students’ hard skills and soft skills. The experimental design is "One Group Pretest-Pottest Control Groups Design". The samples of the research are the students who take the first basic physics practice. Data analysis techniques were effect size and gain score. Based on the result of the research, it was found that the improvement of hard skills and soft skills of the students reached 0.49 and 0.61 which was categorized as moderate. For effect size obtained data of 2.65 and 3.61 for hard skills and soft skills are categorized very high. It can be concluded that the effectiveness of the use of the first basic physics practice module based on guided inquiry is very significant to improve hard skills and soft skills of the students.Tujuan penelitian ini untuk mengidentifikasi keefektifan penggunaan panduan praktikum fisika dasar 1 berbasis guided inquiry terhadap peningkatan hard skills dan soft skills mahasiswa. Desain eksperimen yang digunakan adalah One Group Pretest-Postest Control Groups Design. Sampel penelitian adalah mahasiswa yang menempuh praktikum fisika dasar 1. Teknik analisis data yang digunakan adalah effect size dan gain score. Berdasarkan hasil penelitian diperoleh peningkatan hard skills dan soft skills mahasiswa mencapai 0.49 dan 0.61 yang berkategori sedang. Hal ini menunjukkan bahwa penggunaan panduan praktikum fisika dasar 1 dapat meningkatkan hard skills dan soft skills mahasiswa. Untuk uji effect size diperoleh data sebesar 2.65 dan 3.61 untuk hard skills dan soft skills yang berkategori tinggi. Dari hasil penelitian dapat disimpulkan bahwa kefektivitas penggunaan modul panduan praktikum fisika dasar 1 berbasis guided inquiry sangat efektif untuk meningkatkan hard skills dan soft skills mahasiswa.

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