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INDONESIA
Jurnal Pendidikan Fisika Indonesia
Published by Universitas Negeri Semarang
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Articles 36 Documents
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Search results for , issue "Vol 12, No 2 (2016)" : 36 Documents clear
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): July 2016
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v12i2.4937

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
PENGARUH KARET ALAM SIKLIK (CYCLIC NATURAL RUBBER) TERHADAP RONGGA ASPAL MODIFIKASI Ritonga, W.; Irfandi, I.
Jurnal Pendidikan Fisika Indonesia Vol 12, No 2 (2016): July 2016
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v12i2.4389

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh karet alam siklik terhadap rongga aspal modifikasi. Tahapan peneltian meliputi pembuatan aspal modifikasi dengan menyampur aspal murni dengan karet alam siklik, pengujian persyaratan fisik aspal, pembuatan benda uji dan pengujian marshall. Berdasarkan pengujian sifat fisik aspal diperoleh data bahwa keseluruhan aspal modifikasi memenuhi persyaratan fisik aspal. Setelah pembuatan benda uji, dilakukan pengujian marshall untuk memperoleh rongga aspal meliputi VIM, VMA dan VFA. Nilai VIM pada penambahan 0 phr, 1 phr, 2 phr, 3 phr, dan 4 phr adalah 3,65%, 5,41%, 4,27%, 3,84%, dan 2,88%. Nilai VMA sebesar 15,52%, 17,26%, 16,07%, 15,80%, dan 15,17%. Nilai VFA sebesar 76,48%, 68,72%, 73,54%, 75,76%, dan 81,34%. Diperoleh kesimpulan bahwa karet alam siklik bisa dijadikan sebagai bahan memodifikasi aspal dan berpengaruh terhadap rongga aspal.This research aimed to determine the effect of cyclic natural rubber (CNR) to cavity of modified bitumen. The steps of the research were mixing the pure bitumen with CNR, testing bitumen physical requirement, making the specimen, and testing the cavity of modified bitumen with marshall method. Testing showed that all the modified bitumen met the physical requirement. After making specimen, marshall method was used to determine the cavity of bitumen, including VIM, VMA, and VFA. VIM in addition of 0 phr, 1 phr, 2 phr, 3 phr, and 4 phr was 3,65%, 5,41%, 4,27%, 3,84%, and 2,88%. The value of VMA was 15.52%, 17.26%, 16.07%, 15.80% and 15.17%. The value of VFA was 76.48%, 68.72%, 73.54%, 75.76% and 81.34%. The conclusion of this study was CNR could be used as material for bitumen modified and had the effect on bitumen cavity.
STUDY ON PHYSICAL-CHEMICAL PROPERTIES OF FURNACE-NICKEL-SLAG POWDER FOR GEOPOLYMER APPLICATION Samnur, S.; Husain, H.; Zulfi, A.; Sujiono, E. H.
Jurnal Pendidikan Fisika Indonesia Vol 12, No 2 (2016)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

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

Abstract

This research aims to prepare powder of nickel slag from furnace machine, identify, and analyze of the elements or compounds containing in the sample. The data retrieval was done with the analysis of elemental composition, phase microstructures, crystal size, distribution, and composition mapping of the samples by using XRD, Rigaku Miniflex II, and SEM-EDS, Tescan Vega-3. XRD result indicates that the formation which the similar to amorphous phase was identified and the formation at peak 2? = 28.01° is identified as the low quartz (SiO2). FWHM 0.18° was obtained using microcal origin 6.0 and average crystal size 53.37 nm was obtained by applying Scherer equation. SEM results show average grain size of samples which is less than 1?m and maximum to 4?m. Based on EDS result, the main constituent elements are Si 32.86 wt%, Mg 19.40 wt%, and Fe 32.03 wt%, respectively.Penelitian ini bertujuan untuk menyiapkan bubuk slag nikel yang berasal dari furnace, yang dilanjutkan dengan mengidentifikasi dan menganalisis unsur atau paduan yang terkandung di dalamnya. Data diperoleh dengan melakukan analisis terhadap komposisi unsur, fasa mikrostruktur, ukuran Kristal, distribusi dan komposisi paduan dari sampel bubuk slag nikel furnace dengan menggunakan XRD tipe Rigaku Miniflex II dan SEM-EDS tipe Tescan Vega-3. Hasil analisis XRD menunjukkan bahwa formasi yang dihasilkan menyerupai fase amorf dan formasi yang terbentuk pada puncak 2? = 28.01° diidentifikasi sebagai low quartz (SiO2). Dengan menggunakan microcal origin 6.0 diperoleh FWHM 0.18 ° dan menggunakan persamaan Scherer diperoleh rata-rata ukuran kristal 53.37 nm. Hasil pengukuan SEM menunjukkan bahwa rata-rata ukuran butir dari sampel bubuk slag nikel furnace bervariasi antara minimal 1?m dan maksimum 4 ?m. Berdasarkan pengukuran EDS diperoleh secara berturut-turut bahwa unsur utama penyusun paduan slag nikel furnace adalah Si 32.86 wt%, Mg 19.40 wt%, dan Fe 32.03 wt%.
PENINGKATAN HASIL BELAJAR FISIKA DENGAN MENERAPKAN MODEL PEMBELAJARAN ADVANCE ORGANIZER BERBANTU ANIMASI KOMPUTER Hatika, R. G.
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.v12i2.5210

Abstract

Dalam usaha mendapatkan hasil belajar siswa yang baik maka tenaga pendidikan harus mempunyai strategi dalam melakukan pembelajaran. Salah satu model pembelajaran yang dapat digunakan yaitu Advance Organizer. Dalam hal menunjang penggunaan suatu model, maka diperlukannya penggunaan media pembelajaran tertentu, salah satu media yang dapat digunakan yaitu media animasi komputer. Sampel penelitian diambil berdasarkan Sampling Jenuh. Desain penelitian yang digunakan dalam penelitian ini adalah desain kelompok Two group posttest only. Hasil analisis daya serap dalam kategori baik, ketuntasan belajar secara klasikal sudah tuntas dan efektivitas pembelajaran adalah efektif. Ini berarti bahwa penggunaan model Advance Organizer berbantu animasi komputer adalah efektif digunakan dalam melihat hasil belajar fisika siswa SMA Rambah Hilir baik ditinjau melalui daya serap, ketuntasan belajar dan efektivitas pembelajarannya.In an effort to get the good results of student learning the teacher must have strategies for learning. One model of learning that can be used is Advance Organizer. In terms of supporting the use of a single model, there is a need for the use of specific instructional media. The media that can be used is computer animation media. The design used in this research was the group design of two group posttest only. The results of the analysis of absorption was in good, classical learning completeness has been completed and the effectiveness of learning was effective. This means that the use of model Advance Organizer assested computer animation is effective in view student learning outcomes of physics at SMA Rambah Hilir well reviewed through absorption, mastery learning and learning effectiveness.
PENGUKURAN KUALITAS CITRA DIGITAL COMPUTED RADIOGRAPHY MENGGUNAKAN PROGRAM PENGOLAH CITRA Ningtias, D. R.; Suryono, S.; Susilo, S.
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.v12i2.5950

Abstract

Penelitian yang telah dilakukan adalah pembuatan dan penghitungan kualitas citra digital menggunakan program Modulation Transfer Function (MTF) pada sistem Computed Radiography (CR) untuk kegiatan Quality Control (QC). MTF dapat digunakan untuk menganalisis resolusi spasial citra digital secara akurat. Pada penelitian ini menggunakan phantom yang terbuat dari tembaga berukuran 15x15 cm dengan ketebalan 1 mm. Phantom dieksposi dengan variasi tegangan 50 kV, 60 kV, 70 kV dan 81 kV dan masing-masing dilakukan variasi arus. Data yang diperoleh berupa file citra digital radiografi format DICOM yang kemudian dilakukan analisis kualitas citranya menggunakan PC diluar sistem CR dengan metode MTF. Metode ini sangat efisien dalam melakukan QC resolusi spasial secara kuantitatif sehingga dapat digunakan untuk menilai kualitas pesawat CR. Hasil pengukuran menunjukkan bahwa semakin tinggi tegangan yang digunakan, maka kualitas citra semakin baik dengan arus optimal pada rentang 4-8 mAs dengan rata-rata nilai resolusi spasial 7,26 lp/mm.The research was analyzing of digital image quality by using Modulation Transfer Function (MTF) on Computed Radiography (CR) system for Quality Control (QC). MTF can be used for analyzing digital image spatial resolution accurately. The research used phantom that made of 15x15 cm2 copper and 1 mm thickness. The phantom was expounded with voltage variations by 50 kV, 60 kV, 70 kV dan 81 kV and each of them have been taken by variations of the current. The the image quality of data obtained in the form of radiography digital image files with DICOM format were then analyzed using PC out of CR system with methode of MTF. This methode is really efficient for QC spatial resolution quantitatively and so it can be used for assesing the quality of CR. The measurement results showed that the higher the voltage, the better image quality with optimal current was on the range between 4-8 mAs with the average value of MTF 7,26 lp/mm.
PENGARUH BALIKAN FORMATIF TERINTERGRASI STRATEGI PEMBELAJARAN DIAGRAM VEE DAN KEMAMPUAN AWAL TERHADAP PENGUASAAN KONSEP SISWA Sofianto, E. W. N.; Wartono, W.; Kusairi, S.
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.v12i2.4269

Abstract

Penelitian ini bertujuan untuk mengetahui interaksi antara penilaian formatif dengan kemampuan awal terhadap penguasaan konsep siswa materi fluida statis, suhu, dan kalor. Metode penelitian menggunakan kuasi eksperimen faktorial 2 x2. Populasi penelitian ini adalah seluruh siswa kelas X MIA SMA Negeri 1 Singosari tahun ajaran 2014/2015 yang terdiri dari 5 kelas dengan jumlah 170 siswa yang akan mendapatkan materi fluida statis, suhu dan kalor. Sampel yang digunakan adalah kelas X MIA 1 dengan pembelajaran Diagram Vee-balikan formatif, sedangkan X MIA 3 menggunakan Diagram Vee-penugasan. Penguasaan konsep siswa diukur dengan tes penguasaan konsep pada materi fluida statis, suhu dan kalor. Hasil dari tes penguasaan konsep dianalisis dengan uji prasyarat analisis. Pada uji normalitas, kemampuan awal siswa dan penguasaan konsep siswa terdistribusi normal dengan nilai p (sig) > 0,05. Pada uji homogenitas, kemampuan awal siswa dan penguasaan konsep siswa data homogen dengan p (sig) > 0,05. Hasil uji hipotesis penelitian menggunakan uji Anova Two Ways, menunjukkan tidak ada interaksi antara kemampuan awal dan penilaian formatif terhadap penguasaan konsep.This study aimed to determine interaction among formative assessment, prior knowledge and the student mastery of the concept of static fluid, heat and temperature. This research used quasi experimental method using 2x2 factorial. The population was all students of grade X, science program of Senior High School Singosari, school year 2014/2015 which consists of five class with 170 students who will get material of static fluid, heat and temperature. The samples were grade X science 1 with Diagram Vee formative assessment and grade X science 3 with Diagram Vee assignment. Mastery of concepts were measured by using sumative test of static fluid, heat and temperature. Result of mastery of concepts were tested by using analysis precondition test. The normality test showed that prior knowledge and mastery of concepts of student was normally distributed with p (sig) > 0,05. The homogeneity test showed that prior knowledge and mastery of concepts of student were homogenous with p (sig) > 0,05. Result of hypothesis testing with Anova Two Ways showed no interaction among prior knowledge, formative assessment and mastery of concepts .
THIN FILM-BASED SENSOR FOR MOTOR VEHICLE EXHAUST GAS, NH3, AND CO DETECTION Sujarwata, S.; Marwoto, P.; Handayani, L.
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.v12i2.4621

Abstract

A copper phthalocyanine (CuPc) thin film based gas sensor with FET structure and channel length 100 ?m has been prepared by VE method and lithography technique to detect NH3, motor cycle exhaust gases and CO. CuPc material layer was deposited on SiO2 by the vacuum evaporator (VE) method at room temperature and pressure of 8 x10-4 Pa. The stages of manufacturing gas sensor were Si/SiO2 substrate blenching with ethanol in an ultrasonic cleaner, source, and drain electrodes deposition on the substrate by using a vacuum evaporator, thin film deposition between the source/drain and gate deposition. The sensor response times to NH3, motorcycle exhaust gases and CO were 75 s, 135 s, and 150, respectively. The recovery times were 90 s, 150 s and 225, respectively. It is concluded that the CuPc thin film-based gas sensor with FET structure is the best sensor to detect the NH3 gas.Sensor gas berbasis film tipis copper phthalocyanine (CuPc) berstruktur FET dengan panjang channel 100 ?m telah dibuatdengan metode VE dan teknik lithography untuk mendeteksi NH3 gas buang kendaraan bermotor dan CO. Lapisan bahan CuPc dideposisikan pada permukaan silikon dioksida (SiO2) dengan metode vacuum evaporator (VE) pada temperatur ruang dengan tekanan 8 x10-4 Pa. Tahapan pembuatan sensor gas adalah pencucian substrat Si/SiO2 dengan etanol dalam ultrasonic cleaner, deposisi elektroda source dan drain di atas substrat dengan metode vacuum evaporator, deposisi film tipis diantara source/drain dan deposisi gate. Waktu tanggap sensor terhadap NH3, gas buang kendaraan bermotor dan CO berturut-turut adalah 75 s, 135 s,dan 150 s. Waktu pemulihan berturut-turut adalah 90 s, 150 s,dan 225 s. Disimpulkan bahwa sensor gas berstruktur FET berbasis film tipis CuPc merupakan sensor paling baik untuk mendeteksi adanya gas NH3.
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
PENGARUH KARET ALAM SIKLIK (CYCLIC NATURAL RUBBER) TERHADAP RONGGA ASPAL MODIFIKASI Ritonga, W.; Irfandi, I.
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.v12i2.4389

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh karet alam siklik terhadap rongga aspal modifikasi. Tahapan peneltian meliputi pembuatan aspal modifikasi dengan menyampur aspal murni dengan karet alam siklik, pengujian persyaratan fisik aspal, pembuatan benda uji dan pengujian marshall. Berdasarkan pengujian sifat fisik aspal diperoleh data bahwa keseluruhan aspal modifikasi memenuhi persyaratan fisik aspal. Setelah pembuatan benda uji, dilakukan pengujian marshall untuk memperoleh rongga aspal meliputi VIM, VMA dan VFA. Nilai VIM pada penambahan 0 phr, 1 phr, 2 phr, 3 phr, dan 4 phr adalah 3,65%, 5,41%, 4,27%, 3,84%, dan 2,88%. Nilai VMA sebesar 15,52%, 17,26%, 16,07%, 15,80%, dan 15,17%. Nilai VFA sebesar 76,48%, 68,72%, 73,54%, 75,76%, dan 81,34%. Diperoleh kesimpulan bahwa karet alam siklik bisa dijadikan sebagai bahan memodifikasi aspal dan berpengaruh terhadap rongga aspal.This research aimed to determine the effect of cyclic natural rubber (CNR) to cavity of modified bitumen. The steps of the research were mixing the pure bitumen with CNR, testing bitumen physical requirement, making the specimen, and testing the cavity of modified bitumen with marshall method. Testing showed that all the modified bitumen met the physical requirement. After making specimen, marshall method was used to determine the cavity of bitumen, including VIM, VMA, and VFA. VIM in addition of 0 phr, 1 phr, 2 phr, 3 phr, and 4 phr was 3,65%, 5,41%, 4,27%, 3,84%, and 2,88%. The value of VMA was 15.52%, 17.26%, 16.07%, 15.80% and 15.17%. The value of VFA was 76.48%, 68.72%, 73.54%, 75.76% and 81.34%. The conclusion of this study was CNR could be used as material for bitumen modified and had the effect on bitumen cavity.
SYNTHESIS AND OPTIMIZATION OF CARBON NANOPARTICLES (C-DOTS) AS ABSORBER MATERIALS FOR SOLAR DISTILLATION APPLICATIONS Nuryadin, B. W.; Qulsum, U.; Mahen, E. C. S.; Nuryantini, A. Y.; Aliah, H.; Perkasa, Y. S.
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.v12i2.7518

Abstract

Carbon nanoparticles (C-Dots) were synthesized using citric acid and urea as carbon and fuel source, and combustion reaction methods. The absorption spectral and morphology particles of C-Dots were investigated. The morphology describes the synthesis of small (<1 ?m) and monodispersedC-Dots. Thus, the C-Dots solutions has absorption spectral range of about 86% at visible light spectral. This study suggests that the as-prepared carbon nanoparticles (C-Dots) with particle size and absorption spectral tunability might be utilized as solar energy absorber material.Karbon nanopartikel (C-Dots) disintesis menggunakan asam sitrat dan urea sebagai sumber karbon dan bahan bakar, melalui reaksi pembakaran sederhana. Spektrum absorpsi dan morfologi partikel C-Dots diinvestigasi menggunakan UV-Vis Spectrometry dan analisis SEM. Hasil SEM menunjukan bahwa morfologi partikel C-Dots sangat kecil (<1 ?m) dan seragam. Selain itu, larutan C-Dots memiliki spektrum absopsi pada rentang sekitar 86% pada daerah cahaya tampak. Hasil studi ini menunjukan bahwa karbon nanopartikel (C-Dots) dengan ukuran partikel dan spektrum absorpsi yang dapat diatur, sehingga dapat digunakan sebagai material penyerap sinar matahari.

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