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INDONESIA
Jurnal Pendidikan Fisika Indonesia
Published by Universitas Negeri Semarang
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Education,
Education Physics
Arjuna Subject : -
Articles 553 Documents
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PENINGKATAN KINERJA SISTEM KESELAMATAN PASIF PADA REAKTOR NUKLIR DENGAN PENAMBAHAN KOMPONEN RVACS Abdullah, A. G.; Ardiansyah, N. P.; Purnama, W.
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.v10i2.3453

Abstract

Kelengkapan sistem keselamatan pasif dan inheren pada reaktor lanjut merupakan prasyarat utama. Makalah ini mengeksplorasi hasil desain konseptual sistem pembuang sisa panas pada pusat listrik tenaga nuklir berjenis Very High-Temperature Reactor. Tujuan riset ini untuk merancang sistem pembuang sisa panas pusat listrik tenaga nuklir yang terdapat pada dinding reaktor. Studi kinerja Reactor Vessel Auxliary Cooling System (RVACS) dilakukan pada dua jenis pendingin yaitu Timbal-Bismut dan Liquid Salt. Panas dari dinding reaktor dihapus melalui sirkulasi alamiah pada keadaan tunak. Analisis melibatkan sistem perpindahan panas secara radiasi, konduksi dan konveksi alami. Perhitungan perpindahan panas dilakukan pada elemen reaktor vessel, dinding luar guard vessel, dan pelat pemisah. Hasil analisis kecelakaan menunjukkan kedua jenis sistem pendingin reaktor dan sistem pasif sisa pembuangan panas cukup menghapus sisa panas hasil peluruhan dengan sirkulasi alami.ABSTRACTCompleteness of passive safety systems and inherent in advanced reactors is a major prerequisite. This paper explores the results of a conceptual design of the heat removal system at the nuclear power plant (NPP) type Very High-Temperature Reactor. The purpose of this research was to design the reactor vessel auxiliary cooling system (RVACS) of NPP located within the reactor walls. The RVACS performance study was conducted on two types of coolant: Lead-Bismuth and Liquid Salt. Heat was removed from the reactor vessel through the natural circulation in the steady state. Analyses of heat transfer systems involved radiation, conduction and natural convection. Heat transfer calculations were performed on the reactor vessel, guard vessel, and perforated plate. The results from the accident analysis showed that both types, the reactor coolant system and the passive residual heat removal system, adequately remove remaining heat of the decay by a natural circulation.
RADIATION SAFETY ANALYSIS OF NEUTRON COLIMATOR BASED ON NICKEL MATERIAL FOR PIERCING RADIAL BEAMPORT UTILIZATION OF KARTINI RESEARCH REACTOR Widarto, W.; Trikasjono, T.; Akbar, F.
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.v12i2.4937

Abstract

Radiation safety analysis of nickel material neutron colimator (as requirement) for pearcing radial beamport utilization of Kartini research reactor has been done before the neutron colimator instaled. The neutron collimator made of nickel material with cyllindrical geometry which is 156 cm length. The Inside and outside diameter are 16 cm and 19 cm respectively with mean cyllindrical thickness is 1.5 cm. Irradiation process to the neutron collimator begin when the reactor beeing operated for 6 (six) hours per day and assumed optimum at 100 kW power level. Results of the analysis showed that gamma dose rate which was generated by collimator at a distance of 50 cm from the end of the collimator is 1.5328e-03 mr/hours. The dose rate is still below the dose limit value which was required by Nuclear Energy Regulatory Agency (BAPETEN) is 1 mr/hours. It can be concluded that utilization neutron colimator of nickel material which installed at the radial pierching beamport of Kartini Reactor is safelly.Telah dilakukan kajian analisis keselamatan paparan radiasi terhadap kolimator neutron (sebagai persyaratan) sebelum dipasang pada beamport tembus radial reaktor kartini. Kolimator neutron terbuat dari bahan nikel berbentuk silinder panjang 156 cm dengan diameter dalam 16 cm dan diameter luar 19 cm sehingga tebal silinder 1.5 cm. Proses iradiasi terhadap kolimator neutron terjadi pada saat reaktor dioperasikan pada suatu daya dan diasumsikan optimal pada daya 100 kw selama 6 jam dalam satu hari. Hasil analisis menunjukan laju dosis gamma yang dihasilkan kolimator pada jarak 50 cm dari ujung kolimator sebesar 1.5328e-03 mr/jam. Laju dosis tersebut masih dibawah nilai batas dosis yang ditetapkan oleh bapeten sebesar 1 mr/jam, sehingga penggunaan kolimator tersebut dalam batas aman
Kajian Pengaruh Radiasi Sinar Gamma Terhadap Susut Bobot Pada Buah Jambu Biji Merah Selama Masa Penyimpanan Akrom, M.; Hidayanto, E.; -, Susilo
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.v10i1.3055

Abstract

Telah dilakukan radiasi pada sampel jambu biji merah (psidium guajava linn) pada variasi dosis 0.2, 0.4, 0.6, 0.8, dan 1 kGy menggunakan sinar gamma dengan sumber isotop Co-60 serta sampel yang tidak diradiasi sebagai sampel kontrol. Penelitian ini bertujuan untuk mengetahui pengaruh radiasi sinar gamma terhadap susut bobot sebagai indikasi dari terjadinya perlambatan proses fisiologis pada buah jambu biji merah selama masa penyimpanan. Sampel jambu biji merah diradiasi sesuai dosis yang ditentukan kemudian disimpan dalam wadah plastik selama 8 hari masa penyimpanan. Hari ke 4 dan ke 8 dilakukan evaluasi terhadap massa sampel untuk mengetahui penyusutan bobot yang terjadi. Hasilnya menunjukkan bahwa sampel yang tidak diradiasi mengalami penyusutan bobot rata-rata 20.27% dan sampel yang diradiasi mengalami penyusutan bobot rata-rata sebesar 1.23 – 5.98%. Perlakuan radiasi gamma mampu memperlambat proses fisiologis dimana terjadi perlambatan penyusutan bobot pada buah jambu biji merah selama masa penyimpanan. The samples of red guava (psidium guajava linn) have been irradiated at variation doses of 0.2, 0.4, 0.6, 0.8, and 1 kGy using gamma rays with Co-60 isotope source and un-irradiated samples as control. The purpose of this research was to determine the effect of gamma irradiation on shrinkage weights as indication of slowing in physiological processes on red guava fruit during storage. Red guava fruit samples were irradiated in certain doses then saved in plastic pan during 8 days storage time. The fourth and eighth day sample mass was measured to determine the shrinkage of the weight. The result showed that un-irradiated sample was shrinkage weighted average 20.27% and the samples were irradiated shrinkage weight by an average of 1.23 to 5.98%. Gamma irradiation is able to slow the physiological processes which cause shrinkage weight on red guava fruit during storage.
Integrasi Budaya Jawa Pada Pengembangan Bahan Ajar Bumi Dan Alam Semesta -, Sarwanto; Sulistyo, E.T.; Prayitno, B.A.; Pratama, H.
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.v10i1.3046

Abstract

Kesulitan siswa dalam mempelajari IPA salah satunya disebabkan oleh sebagian besar materi IPA diadopsi dari sains Barat. Padahal budaya yang mendasari pengembangan sains Barat tidak sama dengan budaya Jawa, maka pembelajaran sains berpotensi menimbulkan kesenjangan (clash) dengan sains lokal. Kesulitan lain disebabkan oleh pembelajaran IPA selama ini dilakukan memisahkan antara konten IPA dan pedagoginya. Penelitian ini bertujuan untuk mengintegrasikan Budaya Jawa dalam pembelajaran IPA yang meliputi proses dan produk (materi) IPA menjadi satu kesatuan pengetahuan (Pedagogical Content Knowledge/PCK). Metode penelitian ini adalah penelitan pengembangan (R&D). Tahap-tahap penelitian meliputi (1) studi pendahuluan; (2) pengembangan PCK; (3) validasi PCK; dan (4) pengembangan produk. Hasil penelitian menunjukkan modul yang dikembangkan layak untuk diujicobakan pada tingkat yang lebih luas dalam perkuliahan Fisika Sekolah Menengah. Western-adoption of most material of science causes student’s difficulties in learning science. Meanwhile, the culture base of Western science development is different from the Javanese one. This is why science learning causes potentially clash to local science. Other difficulty is caused by learning science which has been done by separating content from its pedagogy. This study aims to integrate Javanese culture into science teaching that include process and product to become a unified science knowledge (Pedagogical Content Knowledge/PCK). The research method used was a research & development (R & D), with the stages of (1) preliminary study, (2) development of PCK, (3) validation PCK, and (4) product development. The results showed that the developed modul decent for piloting at a broader level in High School Physics class.
INFLUENCE OF PROBLEM BASED LEARNING MODEL ON STUDENT CREATIVE THINKING ON ELASTICITY TOPICS A MATERIAL Wartono, W.; Diantoro, M.; Bartlolona, J. R.
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.v14i1.10654

Abstract

The phenomenon in the classroom where teachers are still limited space to train and to improve students' creative thinking skills (CTS) on the topic of material elasticity is the main reason for this research. Information on improving students' creative thinking skills in material elasticity topics by implementing problem based learning model (PBL) in learning is also limited. Previous research has not revealed any effort related to improving students' creative thinking skills on material elasticity topics by comparing two different learning models. Therefore this study aims to reveal differences in student learning outcomes on material elasticity materials in PBL and conventional models. Based on the research results obtained information that students 'creative thinking skills scores using PBL model is higher compared with that of conventional learning. It also revealed at each meeting that the CTS indicator of students are always improve. It can be concluded that PBL is very effective in training and improving students' creative thinking skill in physics learning. Thus PBL can be recommended in improving students' creative thinking skills.
PEMBUATAN ELEKTRODA KARBON BERPORI DARI TEMPURUNG KEMIRI DAN PERANCANGAN PROTOTIPE SISTEM CAPACITIVE DEIONIZATION (CDI) UNTUK DESALINASI AIR PAYAU Astuti, A.; Taspika, M.
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.v11i1.4008

Abstract

Telah dilakukan pembuatan karbon aktif dengan bahan dasar tempurung kemiri menggunakan H3PO4 2,5% sebagai aktivator dengan suhu aktivasi (400, 500, dan 600) oC.Luas permukaan aktif yang dihasilkan masing-masing adalah (6,6; 95,6; dan 391,6) m2/g. Karbon yang diaktivasi pada suhu 600 oC digunakan sebagai bahan dasar pembuatan elektroda kapasitor untuk system capacitive deionization (CDI) menggunakan polimer polyvinyl alcohol (PVA) sebaga ipengikat. Berdasarkan data voltammogram siklik terhadap elektroda CDI diperoleh besar kapasitansi spesifik elektroda adalah 50,21 mF/g.  Proses desalinasi dilakukan pada larutanNaCl 0,24 M dengan menyusun elektroda menggunakan system monopolar dan diberitegangan DC 1,2 V.  Penurunan konduktivitas larutan NaCl menggunakan sistem CDI ini sebesar 61,58%, dengan penurunan kadar natrium dalam larutan NaCl yaitu dari 138,0 mg/L menjadi 80,7 mg/L  selama 40 menit. Karbon aktif tempurung kemiri ini sangat potensial untuk dikembangkan sebagai elektroda CDI untuk sistem desalinasi air payau.The writers had done the research of the activated carbon that prepared with the candlenut shell by using H3PO4 2,5% as the activating agent.  All samples were heated at the temperatures of (400, 500, and 600) oC.  The activated carbon have specific surface area (6.582; 95.623; and 391.567) m2/g respectively. Capacitor electrode for capacitive deionization (CDI) was fabricated by using activated carbon that was heated at activation temperature of 600 oC with polyvinyl alcohol (PVA) as the binder. Based on cyclicvoltammogram of electrode, specific capacitance of CDI electrode is 50.21 mF/g.  To observe desalination process of electrode, CDI was made by monopolar system and immersed in NaCl 0.24 M as brackish water sample.  Direct current voltage 1.2 V was applied to CDI cell.  The decreased of NaCl conductivity with CDI system respectively is 61.58%.  Sodium concentration in NaCl decreases from 138.000 mg/L to 80.667 mg/Labout 40 minutes of desalination process.The activated carbon that prepared from candlenut shell is potential to develop as CDI system for desalination of brakish water.
THE DEVELOPMENT OF QUESTIONNAIRE TO INVESTIGATE STUDENTS ATTITUDES AND APPROACHES IN PHYSICS PROBLEM SOLVING Sirait, J.; Sutrisno, L.; Balta, N.; Mason, A.
Jurnal Pendidikan Fisika Indonesia Vol 13, No 2 (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.v13i2.6592

Abstract

This study aims to develop physics problem solving survey utilized to obtain students’ attitude and approach while solving physics problem. Several steps are conducted to develop the survey: validating, computing reliability, and testing. This research involves Physics Education students-Tanjungpura University who study at Fourth and Sixth semester. Furthermore, after questionnaire administered to the students, data are analysed through determining average score of the students and computing average percentage of students who are agree, neutral, and disagree based on semester and gender. The results show that the sixth semester students’ responses are more expertlike than those of the fourth semester students and female students are less expert than those male students. Based on semester and gender, majority of students have the same attitudes and approaches while solving problems. Students and experts have different attitudes about the role of mathematics in problem solving.
MODEL PEMBELAJARAN SAINS BERBASIS PROSES KREATIF-INKUIRI UNTUK MENINGKATKAN BERPIKIR KREATIF DAN PEMAHAMAN KONSEP SISWA SMP Panjaitan, M. B.; Nur, M.; Jatmiko, B.
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.v11i1.3999

Abstract

The purpose of this research is to develop and describe science characteristics learning model based on Creative-Inquiry process to increase students’ creative thinking and understanding in SMPN Pematangsiantar. The learning model used Borg & Gall with One-Group Pretest Posttest Design. The data collection used validation method, observation, test, and questionnaire. The technique of data analysis used descriptive quantitative, qualitative, and non-parametric statistic. The research results are: 1)The learning material has valid category, 2) Learning material from lesson plan implementation has practical category, 3)The effectiveness of learning material is seen from Improving students’ learning achievement and Creative thinking ability through N-gain has high category. Result of non-parametric statistic analysis, namely: There isn’t difference and improvement of students’ creative thinking ability in SMPN P.siantar. Students’ responds in learning material implementation are very positive. The conclusion is science learning materials based on Creative-Inquiry process are valid, practical, and effective in SMPN Pematangsiantar. Penelitian ini bertujuan untuk mengembangakan dan mendeskripsikan karakteristik model pembelajaran sains berbasis proses kreatif-inkuiri untuk meningkatkan pemahaman dan berpikir kreatif siswa di SMPN. Model pembelajaran menggunakan model Borg & Gall dengan One-Group Pretest Posttest Design. Pengumpulan data menggunakan metode validasi, observasi, tes, dan angket. Teknik analisis data menggunakan analisis deskriptif kuantitatif, kualitatif, uji statistik non-parametrik. Hasil penelitian adalah: 1) perangkat pembelajaran berkategori tinggi, 2) perangkat pembelajaran ditinjau dari pelaksaan RPP berkategori tinggi, 3) keefektifan perangkat pembelajaran dilihat dari peningkatan hasil belajar siswa dan kemampuan berpikir kreatif siswa melalui N-gain berkategori tinggi. Hasil dari analisa uji statistik non-parametrik adalah tidak terdapat perbedaan dan peningkatan dari kemampuan berpikir kreatif siswa di SMPN Pematangsiantar. Respon siswa terhadap pelaksanaan perangkat pembelajaran sangat positif. Kesimpulannya adalah perangkat pembelajaran sains berbasis proses kreatif-inkuiri adalah valid, praktis, dan efektif di SMPN Pematangsiantar.
THE IMPLEMENTATION OF LEARNING DEVICES WITH SCIENTIFIC APPROACH TO IMPROVE STUDENT LIFE SKILLS Hikmawati, H.; Rokhmat, J.; Sutrio, S.
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.v13i1.10152

Abstract

The purpose of this study was to test the effectiveness of the implementation of learning device with scientific approach to improve student life skills. The research uses one group pre test–post test design. Subjects in this study were students of grade ten (class X). Implementation of learning device supports effectively in learning activities if the implementation of a lesson plan by teachers, student social skills and student academic skills at least in a good category. The results showed that the implementation of lesson plan by teachers to get the average value of 3.38 are in the very good category, gain value of the student social skill at average value of 3.03 is in the very good category, and gain of student academic skill at average value of 76 is in the good category. It concludes that the implementation of learning tools with scientific approach support effectively in learning activities.
KORELASI PENGUASAAN MATERI MATEMATIKA DASAR DENGAN PENGUASAAN MATERI PENDAHULUAN FISIKA INTI Kereh, C. T.; -, Liliasari; Tjiang, P. C.; Sabandar, J.
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.v10i2.3449

Abstract

Perkuliahan Pendahuluan Fisika Inti (PFI) di Program Studi Pendidikan Fisika di suatu LPTK di Ambon terkendala oleh kurangnya penguasaan matematika dasar mahasiswa, juga tenaga dosen dan ruangan jumlahnya terbatas. Salah satu upaya yang dilakukan untuk mengatasi masalah tersebut di atas, maka dilakukan perkuliahan berbasis web dengan memperhatikan matematika dasar terkait. Tujuan penelitian ini adalah untuk mengetahui tentang: (1) konten matematika dasar yang berkaitan langsung dengan materi PFI, dan (2) korelasi antara penguasaan materi Matematika Dasar (MD) mahasiswa dan penguasaan materi PFI mereka setelah melalui suatu perkuliahan. Studi ini dilakukan secara kuasi eksperimen terhadap dua kelompok mahasiswa, masing-masing berjumlah 28 orang. Kelompok yang pertama diajarkan dengan menggunakan perkuliahan konvensional dengan tatap muka di dalam kelas selama delapan kali pertemuan sedangkan kelompok kedua menggunakan blended learning. Pada kedua kelompok mahasiswa dilakukan tes awal dan tes akhir materi MD dan PFI. Hasil penelitian ini menunjukkan bahwa ada korelasi yang tinggi antara penguasaan materi Matematika Dasar dengan materi Pendahuluan Fisika Inti.ABSTRACTNuclear Physics Introduction (NPI) is a course in Physics Education Program in a teacher education program in Ambon. It had been constrained by the lack of students’ mastery on basic mathematics. Moreover, the number of lecturers and rooms were limited. In order to overcome the problems, a web based NPI course had been carried out. The aims of this research were to know: (1) which mathematics contents related to NPI and (2) the correlation between students’ mastery on basic mathematics and their mastery on NPI. This study was conducted in a quasi-experimental design. There were two groups consisted of 28 students in each group. The first group had been taught by direct instruction, and the second by blended learning. There were administered a pre-test and a post-test of basic mathematics and NPI for both groups. The results showed that there was a strong correlation between students’ mastery on basic mathematics and their mastery on Nuclear Physics Introduction.

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