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All Journal RADIASI: Jurnal Berkala Pendidikan Fisika POSITRON IPTEK The Journal for Technology and Science Jurnal Pendidikan Fisika Indonesia Abdimas Jurnal Kimia dan Kemasan JFA (Jurnal Fisika dan Aplikasinya) Jurnal Fisika FLUX Scientiae Educatia: Jurnal Pendidikan Sains JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Journal of Physics: Theories and Applications Ketenagalistrikan dan Energi Terbarukan Edu Sciences Journal Jurnal Sains dan Edukasi Sains Journal of Science and Science Education Magistrorum et Scholarium: Jurnal Pengabdian Masyarakat
Nur Aji Wibowo
Universitas Kristen Satya Wacana
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Pembuatan Media Pembelajaran Pengukuran Viskositas dengan Menggunakan Viskometer Dua Kumparan dan Freewave3 Shanti, M. R. S.; Oktaviara, A.; Sutresno, A.; Wibowo, N. A.
Jurnal Pendidikan Fisika Indonesia Vol 10, No 1 (2014): January 2014
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.v10i1.3048

Abstract

Saat ini banyak cara dilakukan untuk meningkatkan kualitas pembelajaran dengan memanfaatkan media pembelajaran yang dirancang sendiri oleh guru. Pada penelitian dirancang media pembelajaran yaitu mengukur viskositas oli menggunakan metode viskositas bola jatuh dengan memanfaatkan dua kumparan sebagai sensor pendeteksi. Dimana dua kumparan dihubungkan dengan osiloskop dan hasilnya diolah menggunakan software freewave3. Dengan memberikan sinyal sinusoidal pada kumparan dan menjatuhkan bola kedalam tabung yang berisi fluida, akan didapatkan informasi perubahan tegangan saat bola tepat melewati kumparan. Dari data yang terekam pada software freewave3 dapat dihitung besar kecepatan terminal bola. Kecepatan terminal bola ditentukan dengan menghitung gradien dari grafik jarak terhadap waktu. Sehingga didapatkan nilai viskositas oli sebesar μ=0.85 Ns/m2. Lembar kerja siswa diuji cobakan pada beberapa mahasiswa dan didapatkan 87,5% mahasiswa menganggap bahwa pengukuran viskositas dengan menggunakan viskometer dua kumparan adalah hal baru bagi mereka, mudah diikuti, mempermudah dalam memahami dan menghitung viskositas fluida, dan memotivasi mereka dalam belajar fisika. Nowadays, there are many ways done to improve quality of learning by taking benefits from learning media designed by teacher. In this research, a viscosity measurement learning media was designed by applying two coils as transducer. Two coils were connected to osciloscop and the result was managed by freeware3 software. By giving sinusiodal signal to the coils dan droping ball into the tube containing oilt, an information of voltage change at the time of the ball passes the coil will be gathered. From the recorded data, the ball terminal velocity can be found by calculating the slope of distance-time graph, with the result of μ=0.85 Ns/m2. Student worksheets were distributed to several students and it was found that 87,5 % of the students considered that the measurement was a new thing for them , easy to follow , make them easier to understand and calculate the viscosity of the fluid , and motivate them to learn physics.
UPAYA PEMANFAATAN LIMBAH BIJI MANGGA MENJADI PRODUK BERNILAI EKONOMI DI DESA KENDEL KABUPATEN BOYOLALI Soetjipto, Hartati; Linawati, Lilik; Wibowo, Nur Aji
Jurnal Abdimas Vol 19, No 1 (2015)
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M), Universitas Negeri Semarang

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Abstract

Limbah biji mangga yang terbuang percuma dapat diolah menjadiberbagai produk yang memiliki nilai jual seperti minyak, sabun dan tepung biji mangga. Hasil penelitian di laboratorium Kimia FSM UKSW telah diaplikasikan di kelompok ibu-ibu PKK desa Kendel kabupaten Boyolali sejak April–Oktober 2014. Minyak biji mangga yang diperoleh dengan metoda ekstraksi, dibuat sabun mandi dengan metoda dingin sedangkan tepung biji mangga diperoleh dengan metoda pengeringan. Tujuan dari pelatihan ini adalah untuk meningkatkan kemampuan SDM ibu-ibu yang tergabung dalam kelompok PKK desa Kendel agar mampu menghasilkan produk barang layak jual untuk membantu perekonomian keluarga.Kata kunci: Kendel, minyak biji mangga, sabun alami, tepung biji mangga
Analisis Elektron Beam Profile Constancy pada Pesawat Linac Wibowo, Nur Aji; Hidayatullah, Muhammad; Guritna, Edi; Maslebu, Giner
Jurnal Fisika FLUX Vol 14, No 2 (2017): Jurnal Fisika FLUX Edisi Agustus 2017
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v14i2.4134

Abstract

Radioterapi adalah pengobatan penyakit terutama tumor atau kanker ganas dengan menggunakan radiasi elektromagnetik (Sinar-X dan Gamma) dan radiasi partikel (elektron, proton, dan neutron). Salah satu alat radioterapi modern yang digunakan dalam pengobatan penyakit kanker adalah linear accelerator (linac). Alat radioterapi ini menghasilkan elektron dan sinar-X (foton) yang dibangkitkan oleh generator dan mempunyai energi yang bervariasi. Dalam penelitian profil dosis, digunakan pesawat liner accelerator (linac) Siemens Primus berkas elektron 5 MeV dengan luas lapangan radiasi berkisar dari 5×5 cm2 sampai 25×25 cm2. Pengukuran profil dosis dilakukan dengan menggunakan water phantom,  detektor farmer chamber dan condenser chamber yang dilengkapi dengan  computer control units (CCU) serta dilakukan untuk arah crossline dan inline pada kedalaman Dmax dan kedalaman tertentu. Penelitian ini bertujuan untuk menganalisis profil berkas sinar elektron energi 5 MeV pada kedalaman tertentu dan Dmax dengan variasi luas lapangan 5×5 cm2, 10×10 cm2, 15×15 cm2, 20×20 cm2, 25×25 cm2. Hasil analisis profil dosis pada berkas elektron 5 MeV menunjukkan bahwa lapangan 5×5 cm2 memiliki nilai flatness yang cukup besar sehingga dalam kalibrasi maupun terapi radiasi perlu diperhatikan penggunaan  luas lapangan tersebut. Dalam penelitian ini juga didapatkan bahwa nilai flatness paling ideal (nilai flatness rendah) terjadi pada lapangan 15×15 cm2. Sehingga ada luas lapangan lain yang bisa digunakan untuk treatment maupun kalibrasi selain 10×10 cm2 yaitu 15×15 cm2 yang memiliki nilai flatness rendah.
THICKNESS DEPENDENCE OF MAGNETIC SWITCHING DYNAMICS OF BARIUM-FERRITE AS A HIGH-DENSITY PERPENDICULAR MAGNETIC STORAGE MEDIA Aji, P. P.; Rondonuwu, F. S.; Wibowo, N. 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.v13i2.8499

Abstract

Micromagnetic study of material thickness dependence of Barium-ferrite nano-dot magnetization dynamics has been performed. The used materials characteristics in this research represent the properties of Barium-ferrite. Barium-ferrite was modeled as a nano-dot with a surface area of 50 × 50 nm2 and its thickness varies from 5 nm to 100 nm. This nano-dot was simulated using micromagnetic simulator software by solving Landau-Lifshitz-Gilbert equation. According to this study, obtained that the Barium-ferrite nano-dot has excellent thermal stability. Magnetization rate of this nano-dot decreases exponentially with the increase of thickness. The fastest magnetization rate observed in 5 nm of nano-dot thickness, meanwhile 45 nm for the slowest rate. Magnetization reversal mode of this Barium-ferrite nano-dot is dominated by domain wall nucleation and propagation. During the propagation of the domain wall, the exchange interaction becomes the main aspect compared to the other contributed energies.
THE POROSITY CALCULATION OF VARIOUS TYPES OF PAPER USING IMAGE ANALYSIS Astuti, N. H.; Wibowo, N. A.; Ayub, M. R. S. S. N.
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.v14i1.9878

Abstract

The paper porosity study has been done by observing microscopically.The purpose is provide airborne porosity data on various paper types, so that we can rank the ability of liquid absorption on the same paper type. This porosity analysis is done by using ImageJ, with converting the image to binary, set the threshold limit, and clarify the watershed limit. The result of the porosity of filter paper A=51,50586 , B=18,30719 ,C=21,68076 ,D=29,72028 ; tissue paper A=9,174071 ,B=20,96931 ,C=32,76454 ; HVS paper A=23,31616 ,B=27,70944 . So it can be concluded that the ability of filter paper absorption A > filter paper D > filter paper C > filter paper B. Absorption ability tissue paper C > tissue paper B > tissue paper A. Absorption ability HVS B paper > HVS paper A. In general can be inferred that the higher the porosity value of the paper the greater ability to absorb liquids on paper.
PENGUJIAN PROTOTIPE GENERATOR TERMOELEKTRIK BERBAHAN BAKAR MINYAK JELANTAH Siswantika, Priskila Harli; Wibowo, Nur Aji; Setiawan, Andreas
Ketenagalistrikan dan Energi Terbarukan Vol 12, No 2 (2013): KETENAGALISTRIKAN DAN ENERGI TERBARUKAN
Publisher : P3TKEBTKE

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Abstract

Jelantah merupakan limbah yang jumlahnya cukup melimpah tetapi pemanfaatannya belum maksimal. Dengan teknologi termoelektrik, jelantah dapat dimanfaatkan sebagai bahan bakar penghasil energi listrik. Penelitian ini bertujuan untuk menguji efisiensi prototipe generator termoelektrik berbahan bakar minyak jelantah. Generator tersebut terdiri dari 2 sel termoelektrik, pipa pendingin, penerima panas, tungku pembakaran dan tangki bahan bakar. Sumber panas atau kalor dihasilkan dari pembakaran minyak jelantah secara langsung pada tungku pembakaran. Pengujian dilakukan dengan mengukur keluaran tegangan yang dihasilkan dengan memasangkan sebuah hambatan beban (dummy load) secara paralel serta mengukur suhu pada sisi dingin dan sisi panas. Dari hasil percobaan menunjukkan bahwa semakin besar selisih suhu (∆T) maka tegangan keluaran (VRL), daya keluaran (Pout) dan efisiensi generator (ht ) meningkat. Pout dan efisiensi generator maksimum terukur pada pemasangan RL = 11 ohm pada ∆T = 78,1 0C yaitu 0,86 watt dan 1,96%. Dengan menganalisa karakteristik keluaran daya generator pada pemasangan RL=11 ohm keluaran daya didekati dengan suatu permodelan yang dibagi dalam dua bagian. Bagian I pada ∆T 2,5 0C sampai 18,3 0C menunjukkan Rin = 15,58 ohm dan [S1]2= 0,33 volt2/K2 dengan err = 17% terhadap hasil percobaan. Sedangkan bagian II pada ∆T 18,4 0C sampai 78,1 0C diperoleh [S2]2 = 0,06 volt2/K2 dan C = 0,458 dengan err = 2,2%. The quantity of used cooking oil is overflow but it’s utilization is not maximized. By thermoelectric technology, used cooking oil can be used to fuel electricity. This research aims to test the efficiency a thermoelectric generator prototype fueled by used cooking oil. The generator consists of two thermoelectric cells, cooler pipes, thermal receivers, burner and fuel tanks. The sources of heat are generated from the combustion of used cooking oil directly on the furnace. The output voltage is measured by pairing a load resistance (dummy load) in parallel and also by measuring the temperature on the cold side and hot side. The experimental results show when ∆T increases, VRL, Pout and generator efficiency (ht ) also increases. Pout and ht maximum is measured at 0.86 watt and 1.96% when installation of RL = 11 ohm and ΔT = 78.1 0C. Based on analyzing of power output, generator characteristics at installation of RL = 11 ohm can be approached by a modeling which is divided into two parts. The first section on ∆T 7 0C to 18.3 0C shows Rin = 15.58 ohm and [S1]2 = 0.11 volt2/K2 with err = 17%. The second section on ∆T 18.4 0C to 78.1 0C gets [S2]2 = 0.0038 volt2/K2 and C = 0,458 with err = 2.2%.
The Design of One-Dimensional Motion and Two-Dimensional Motion Learning Media Using Digital Camera and Tracker-Based Air Track Fransisca Indra Dewi; Nur Aji Wibowo; Debora Natalia Sudjito; Ferdy Rondonuwu
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol 6 No 1 (2020): JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika), Volume 6 Issue 1, J
Publisher : Program Studi Pendidikan Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (762.407 KB) | DOI: 10.21009/1.06107

Abstract

This research describes the results of the development of 2D air track tools designed for one and two-dimensional motion experiments with small frictional forces. Friction is minimized by using wind gusts through small holes made in all parts of the runway. Motion detection devices used are digital cameras and trackers. Digital cameras are used to record the motion of objects on a platform in the form of video with a specific frame-rate. Tracker is used to analyzing videos that contain information about object motion. This tool has been tested on one-dimensional motion, that is, an object that slides over an inclined plane and two-dimensional motion in the case of a collision of two objects. In the case of one-dimensional position graphs against time can be displayed, the instantaneous velocity and average and acceleration can be accurately determined. In the case of the collision of two objects, the position graph against time can also be displayed for each object before and after the collision. The velocity vector can be determined accurately so that the law of conservation of momentum and kinetic energy can be verified. One and two-dimensional motion are the concepts that underlie almost all other concepts in physics. Therefore one and two-dimensional motion experiments are important to build students’ experiences of the concept. Thus 2D air track platform based on digital cameras and Tracker software can be used as a physics learning media on motion kinematics materials that can display various kinematics graphs so that information about motion is complete.
Desain Modul Pembelajaran Mandiri Tentang Gerak Parabola Pada Bidang Miring Tanpa Gesekan Udara Beta Sugesti Situmeang; Debora Natalia Sudjito; Nur Aji Wibowo
Radiasi : Jurnal Berkala Pendidikan Fisika Vol. 12 No. 1 (2019)
Publisher : Universitas Muhammadiyah Purworejo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.283 KB) | DOI: 10.37729/radiasi.v12i1.16

Abstract

Generally, the learning about projectile motion on inclined surface neglecting air friction can not be delivered during the meeting hours because of the limited time. One way that can be done is by doing independent learning about projectile motion on inclined surface neglecting air friction which is assisted by an independent learning module. The purpose of this study is to design an independent learning module of projectile motion on inclined surface neglecting air friction and to investigate the effectiveness of the module toward undergraduate students’ understanding. Hopefully, this module can enrich the mechanic's modules for the undergraduate students and support them in learning about projectile motion on the inclined surface out of the meeting hours so that they can learn about the projectile motion comprehensively. The method of this study is the ADDIE model of development method consisting of Analysis, Design, Development, Implementation, and Evaluation steps. This independent learning module is applied to three freshmen of the Physics and Physics Education Department. Based on the observation sheet, the undergraduate students were able to do 88% of the module correctly, they also give 90% positive response to the statements of the module, and gets an average evaluation score of 75. Therefore, this independent learning module about projectile motion on inclined surface neglecting air friction is effective in assisting undergraduate students to understand the projectile motion on inclined surface neglecting air friction material.
Karakterisasi Nanopartikel Fe3O4 dan Aplikasinya dalam Adsorpsi Ni(II) DAN Co(II) Cucun Alep Riyanto; Nur Aji Wibowo
Jurnal Kimia dan Kemasan Vol. 41 No. 1 April 2019
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (209.545 KB) | DOI: 10.24817/jkk.v41i1.4013

Abstract

Nanopartikel magnetik Fe3O4 (MNPs) disintesis dari FeSO4•5H2O sebagai sumber Fe dengan penambahan NH4OH melalui proses sol-gel. MNPs digunakan untuk menyerap larutan Ni (II) dan Co (II). Larutan Ni (II) dan Co (II) dianalisis menggunakan spektrofotometer HACH. MNPs dikarakterisasi menggunakan X-Ray Diffraction (XRD), Transmission Electron Microscope (TEM), dan Scanning Electron Microscope (SEM). Hasil penelitian menunjukkan bahwa ukuran partikel MNPs dari 30 nm sampai dengan 70 nm. Dalam proses adsorpsi, MNPs cenderung menjerap larutan yang mengandung logam Co (II) daripada Ni (II). Berdasarkan analisis dengan spektrofotometer HACH, penurunan konsentrasi hanya terjadi pada larutan Co (II) sebesar 55,31% dari 0,47 ppm menjadi 0,21 ppm. 
Karakterisasi Nanopartikel Fe3O4 dan Aplikasinya dalam Adsorpsi Ni(II) DAN Co(II) Cucun Alep Riyanto; Nur Aji Wibowo
Jurnal Kimia dan Kemasan Vol. 41 No. 1 April 2019
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (209.545 KB) | DOI: 10.24817/jkk.v41i1.4013

Abstract

Nanopartikel magnetik Fe3O4 (MNPs) disintesis dari FeSO4•5H2O sebagai sumber Fe dengan penambahan NH4OH melalui proses sol-gel. MNPs digunakan untuk menyerap larutan Ni (II) dan Co (II). Larutan Ni (II) dan Co (II) dianalisis menggunakan spektrofotometer HACH. MNPs dikarakterisasi menggunakan X-Ray Diffraction (XRD), Transmission Electron Microscope (TEM), dan Scanning Electron Microscope (SEM). Hasil penelitian menunjukkan bahwa ukuran partikel MNPs dari 30 nm sampai dengan 70 nm. Dalam proses adsorpsi, MNPs cenderung menjerap larutan yang mengandung logam Co (II) daripada Ni (II). Berdasarkan analisis dengan spektrofotometer HACH, penurunan konsentrasi hanya terjadi pada larutan Co (II) sebesar 55,31% dari 0,47 ppm menjadi 0,21 ppm. 
Co-Authors A. Oktaviara Adita Sutresno Aji, P. P. Albertus Sigit Pradipta Andreas Setiawan Anisa Setiyani Astuti, N. H. Ayub, M. R. S. S. N. Beta Sugesti Situmeang Budi Purnama Cari Cari Cucun Alep Riyanto Debora Natalia Sudjito Dewi Intan Purwitasari Edi Suharyadi Eklesias Donesi Andresta Elfira Josmin Fillimditty Ferdy Rondonuwu Ferdy S. Rondonuwu Ferdy Semuel Rondonuwu Fransisca Indra Dewi Giner Maslebu Guritna, Edi Hafidz Bahtiar Hanny Hafiar Hidayatullah, Muhammad Istiqomah, Nurul Imani Ivana Helga Iriani Jodelin Muninggar, Jodelin Lilik Linawati Lilik Linawati Litta Marlin Patty M. R. S. Shanti Made R. S. S. N. Ayub Mamea, Cinndy Angel Mayasari, Anisa Purwoko, Agus Putri, Dera Anastasya Rahardian, Renaldy Baptista Rendi Hadi Perdana Sari, Emi Kurnia Shinta Monika Utami Siswantika, Priskila Harli Wachid Susilo