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All Journal JPMS (Jurnal Pendidikan Matematika dan Sains) Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Science and Technology Indonesia JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Communications in Science and Technology Kasuari: Physics Education Journal (KPEJ) Automotive Experiences Makara Journal of Science Jurnal MENTARI: Manajemen, Pendidikan dan Teknologi Informasi

Dwi Nanto, Dwi

Department Of Physics Education, Faculty Of Tarbiya And Teaching Science, UIN Syarif Hidayatullah Jakarta, Indonesia

Author-ID : 2527217

Aerospace Engineering Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Other

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Students’ Strategic Thinking Ability Enhancement in Applying Scratch for Arduino of Block Programming in Computational Physics Lecture Umi Pratiwi; Dwi Nanto
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol 5 No 2 (2019): JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika), Volume 5 Issue 2, D
Publisher : Program Studi Pendidikan Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

As newbie programmers, university students are not accustomed to computer coding. It difficult to solve programming problems especially related to physics phenomena. They need strategic thinking ability to solve problems. Therefore, computational physics subject/lesson applies learning of Scratch for Arduino on block programming in order to enhance students' strategic thinking. This attempt is examined by a study using a quasi-experimental method pre-experimental design approach which is one group pretest-posttest design using third-year physics education students 2018/2019 as the sample. The result shows that students happened to increase their strategic thinking up to 11.7%, particularly on the ability to prove the chosen solution it is appropriate to students' problems in finishing projects categorized as “very good.” It enables them to finish simple physics cases by using Arduino programming and improve their coding ability significantly.

Improvement of Science Process Skills Through Sound Variable Intensity Level Tool Kit Royhanun Athiyyah; Taufiq Al Farizi; Dwi Nanto
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

Science process skills (SPS) are essential to assist the learning of senior high school students according to the 2013 curriculum, which prioritizes a scientific approach. The learning method that supports SPS is experiment methods. Nevertheless, learning with experimental methods is still rarely applied in schools, especially in the sound intensity level concept. The reason is the limited number and variant of experiment tool kits to support learning in schools. This study aims to develop a sound variable intensity level sound tool kit based on development procedures proposed by Jan van de Akker (2006). Sound variable intensity level kit was developed based on tool kit, which was developed before by Fikri Habibi. Sound variable intensity level experiment kit was evaluated by several learning media and learning material experts before being tested on high school students in several stages, including the one-on-one evaluation stages, small group evaluations, and field tests. The researcher revised the sound variable intensity level kit based on suggestions from the experts and the students. After being revised, the sound variable intensity level kit was tested on summative evaluation. Based on the results of summative evaluations, the sound variable intensity level kit becomes a successful, practical, and effective learning support tool kit for improving the science process skills of the student in the concept of sound intensity level.

Four-Tier Diagnostic Test Assisted Website for Identifies Misconceptions Heat and Temperature Evi Septiyani; Dwi Nanto
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol 7 No 1 (2021): JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika), Volume 7 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 | DOI: 10.21009/1.07104

Misconceptions get special attention in educational research because they are inhibiting students in learning. Misconceptions often occur in learning physics, especially the concept of heat, and nearly every sub-concept of physics on students experience various misconceptions. One of them is defining heat. Many students believe that temperature is considered as a unit of measure for the amount of heat. This is a wrong conception. Thus, it needs to be identified using appropriate diagnostic test instruments to reduce students’ misconceptions. Four-tier diagnostic tests can detect students’ misconceptions because they can dig deeper into understanding students’ conceptions. Unfortunately, the diagnostic tests of student misconception are still rarely applied at most schools. The reason is time constraints in the implementation and correction of the diagnostic tests. Therefore, here we report digital four-tier diagnostic test instruments of student misconception on heat and temperature through a helpful website and can be accessed anywhere.

Rotating-Magnetic-Field-Assisted Electrodeposition of Copper for Ambulance Medical Equipment Syamsuir, Syamsuir; Susetyo, Ferry Budhi; Soegijono, Bambang; Yudanto, Sigit Dwi; Basori, Basori; Ajiriyanto, Maman Kartaman; Edbert, Daniel; Situmorang, Evi Ulina Margaretha; Nanto, Dwi; Rosyidan, Cahaya
Automotive Experiences Vol 6 No 2 (2023)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.9067

This study examines the influence of the application of a rotating magnetic field in the electrodeposition of copper (Cu). During the electrodeposition, five constant magnets were rotated (500 and 800 rpm) towards the bottom of the sample. To investigate deposition rate, surface morphology, phase, structure, corrosion resistance, and hardness in deposited Cu using a weighing scale, a scanning electron microscope equipped with energy dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD), potentiodynamic polarization, and hardness tester respectively. Bacterial activity was also evaluated through this research. Morphological surface observations showed that the increase in the rotational speed of the magnets during the electrodeposition process led to a smooth surface. A perfect Cu phase covers Al alloy with no oxide. The potentiodynamic polarization demonstrated by the increase in the rotating led to a shift to the more positive value of the corrosion potential. Moreover, the corrosion current also decreases with the increase in the rotating speed of the magnets. Less crystallite size promoted forming a higher hardness and inhibition zone of the Cu films.

Carbon Micron-size Content Dependency in Epoxy/Carbon Composite Coated onto SPCC Plate for Automotive Bodies Protection Anggrainy, Rani; Susetyo, Ferry Budhi; Lubi, Ahmad; Yudanto, Sigit Dwi; Rosyidan, Cahaya; Soegijono, Bambang; Ajiriyanto, Maman Kartaman; Kurniawan, Ova; Nanto, Dwi
Science and Technology Indonesia Vol. 9 No. 4 (2024): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.4.989-998

Conventional epoxy coating for surface metal corrosion protection reported many unsolved technical problems. Adding filler in the epoxy could enhance the promising properties of the composite coating. Our work describes in detail the synthesizing and characterizing epoxy/carbon composite coating. Epoxy was mixed with thinner high gloss (HG) and hardener and stirred using a stirrer apparatus. After blending, various carbons were added (1 wt. %, 3 wt. %, and 5 wt. %) and then appropriately stirred. The different mixture composite was coated onto the steel plate cold rolled coiled (SPCC) plate using high-volume low-pressure (HVLP) in two passes. Various characterizations were performed, including crystallographic orientation, Infra-Red (IR)-spectra, surface morphology, thickness, hydrophobicity, hardness, and corrosion using X-ray diffraction (XRD), Fourier transform infrared (FTIR), Scanning electron microscopy (SEM), portable dry film coating thickness (DFT), digital camera, Vickers microhardness tester, and Potentiostat, respectively. More carbon micron-sized content led to elevate the peak intensity, surface bumpiness, and hydrophobicity. The uppermost external bumpiness and hydrophobicity values are 23.51 µm and 101◦. Hardness depends on carbon content and more carbon leads to an increase in the hardness of the composited coating. The highest average Vickers hardness value is 28.24 HV. The coating thickness influenced the corrosion rate, more coating thickness promoted lesser corrosion rate. The highest coating thickness (60.8 µm) promoted a corrosion rate of around 5.65×10−4 mmpy.

A-Site Doped in Perovskite La(1-x)Bax/2Srx/2Mn0.4Ti0.6O3 (x = 0, 0.1, and 0.3) for Absorbing Microwave Material Saptari, Sitti Ahmiatri; Hapitanur, Dinda; Taryana, Yana; Sudrajat, Nanang; Rahman, Ikhwan Nur; Nanto, Dwi
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 13 No. 2 (2023)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v13n2.p106-118

Microwave radiation can have harmful effects on our bodies. With increased exposure due to online activities, it is essential to use absorber materials like perovskite manganate to reduce radiation. In this study, perovskite manganate La(1-x)Bax/2Srx/2Mn0.4Ti0.6O3 (x = 0, 0.1, and 0.3) was synthesized using the sol-gel method. X-ray diffraction (XRD) analysis revealed that the two samples were multi-phased, LaMnO3 and La2Ti2O7, and were formed, exhibiting a rhombohedral crystal structure (R -3 c). Morphological characterization of the sample surface using a Scanning Electron Microscope (SEM) showed that as doping increases, the grain size decreases from 282.02 to 245.63 nm at x=0 and x=0.3, respectively. This result implies that doping leads to more uniform grain distribution and enhanced grain refinement. Characterization via Vibrating Sample Magnetometer (VSM) revealed that the maximum saturation value, 0.79 emu/g, was attained when x = 0. This sample exhibits soft magnetic properties, as evidenced by its coercivity (Hc) value of < 1kOe. Results from the Vector Network Analyzer (VNA) indicate that the absorption capacity of La(1-x)Bax/2Srx/2Mn0.4Ti0.6O3 increases, with a maximum reflection loss value of -25.5 dB with 1.5 mm thickness. Consequently, La(1-x)Bax/2Srx/2Mn0.4Ti0.6O3 demonstrates potential as a microwave absorber material.

Preparation, synthesis and characterizations of La0.7Sr0.3Mn(1-y)Ni(y)O3 alloy Setiawan, Jan; Susetyo, Ferry Budhi; Nanto, Dwi; Simbolon, Silviana; Notonegoro, Hamdan Akbar; Al Farizi, Taufiq; Yunasfi; Tihera, Dinda; Ramlan
Communications in Science and Technology Vol 9 No 1 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.1.2024.1361

Nickel (Ni) doped in the perovskite manganite could result in superior properties. The effect of the Ni on the morphology, crystallographic orientation, and magnetic properties of La0.7Sr0.3Mn(1-y)Ni(y)O3 alloy (y = 0.1, 0.3, 0.5, and 0.7), therefore, was undertaken. La0.7Sr0.3Mn(1-y)Ni(y)O3 alloy was firstly processed using a ball milling process, and again processed through heat treatment and crushing at the end of the synthesis process. Powder alloy was then investigated using a scanning electron microscope equipped with scanning electron microscope and energy dispersive spectroscopy (SEM-EDS), x-ray diffraction (XRD), and vibrating sample magnetometer (VSM). The particle size became smaller and agglomerated as the amount of Ni doping increased. The polycrystal structure phase formed would become more complex when the Ni doping was 0.5 and 0.7, where the dominant phase formed was La2NiO4 even though the La0.7Sr0.3Mn(1-y)Ni(y)O3 phase was still formed. The magnetic characteristics showed that the Ni doping of 0.1 had a higher magnetization value around 4.2 emu/g at room temperature.

Pengaruh Hasil Belajar Pendidikan Fisika Siswa menggunakan Teknik Meta-analisis dengan Model PBL (Problem Based Learning) Permata Sari, Intan; Nanto, Dwi; Putri, Ananda Alifia
Jurnal MENTARI: Manajemen, Pendidikan dan Teknologi Informasi Vol 1 No 1 (2022): September
Publisher : Pandawan Sejahtera Indonesia

Model pembelajaran berbasis masalah atau PBL (Problem Based Learning) digunakan dalam penelitian ini untuk mengetahui pengaruh dan keefektifan terhadap hasil belajar fisika siswa. Metode penelitian yang digunakan adalah survei deskriptif jurnal nasional yang terakreditasi oleh sinta. Penggunaan teknik meta-analisis digunakan untuk mengetahui dampak pada model pembelajaran PBL. Hasil penelitian dapat diperoleh dengan menggunakan metode meta-analisis. Kebaruan yang didapat menunjukkan rata-rata effect size atau besar pengaruh 0,265 atau kategori efek besar. Sehingga secara keseluruhan berdampak positif dan efektif. Model PBL (Problem Based learning) berpengaruh positif jika dilihat dari segi tingkat pendidikan, materi yang digunakan, dan media yang dipakai. Dapat disimpulkan hasil belajar fisika siswa menggunakan model PBL (Problem Based Learning) dinilai efektif dan terlihat adanya peningkatan.

First-Principles Calculations of Thermoelectric Properties of Fe-Based Full- Heusler Fe2CuSi Nurlaela, Ai; Nanto, Dwi; Azhar, Anugrah; Yuniarti, Elvan; Kristiantoro, Tony; Dedi, Dedi
Makara Journal of Science Vol. 28, No. 3
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

A first-principle study using density functional theory (DFT) and Boltzmann transport was conducted to evaluate the thermoelectric (TE) properties of an Fe-based full-Heusler alloy. The compound studied is Fe2CuSi with a Cu2MnAl-type structure. The electronic properties of Fe2CuSi were obtained using DFT calculations by running the Quantum ESPRESSO (QE) package. By contrast, TE properties, including electron thermal conductivity, electric conductivity, and Seebeck coefficient, were computed using a semi-empirical Boltzmann transport model solved through the BoltzTraP software at 50–1,500 K temperature range. The spin-orbit coupling effect on these properties was also evaluated, demonstrating notable effects on the results. Multiple electronic bands crossing the Fermi level for both spin directions were confirmed by the density of state curve, indicating the metallic behavior of Fe2CuSi. The magnitude of the figure of merit was determined by the Seebeck coefficient, electric conductivity, and electron thermal conductivity. In this study, the maximum dimensionless figure of merit was 0.027, reached at 1,000 K for the spin-down channel.

Comparative Study Between Virtual Laboratory PhET Colorado Versus Applets in Photoelectric Effect Az-zahra, Puput Lismanda; Rohim, Fahmi; Amarulloh, Reza Ruhbani; Nanto, Dwi; Herpi, Aini Nadhokhotani
Kasuari: Physics Education Journal (KPEJ) Vol. 7 No. 2 (2024): December 2024
Publisher : Universitas Papua, Jurusan Pendidikan Fisika FKIP Unipa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37891/kpej.v7i2.644

Our work describes the differences and similarities in several aspects between two virtual laboratory (lab) media, namely Physics Education Technology (PhET) Colorado and Applets the King’s Centre forVvisualization (KCVS). The aspects compared include website appearance, ease of access and use, strengths and weaknesses of each virtual lab, and support for relevant concepts. Virtual lab such PhET Colorado and Applets provide a viable alternative, offering a safe and immersive environment for students to engage with scientific phenomena. The research used a qualitative descriptive approach with a comparative method. The researcher will compare the two virtual lab based on the aforementioned aspects. We find that the PhET Colorado website excels in visualization and data interpretation, meanwhile the Applet website excels in the availability of literature related to the photoelectric effect material.

Co-Authors Agus Jamaludin Aini Nadhokhotani Herpi Amarulloh, Reza Ruhbani Anggrainy, Rani Az-zahra, Puput Lismanda Azhar, Anugrah Bambang Soegijono Basori Basori Basori Cahaya Rosyidan Daniel Edbert, Daniel Dedi Dedi Etty Mutiara Evi Septiyani Evi Ulina Margaretha Situmorang Fathiah Alatas Ferry Budhi Susetyo Ginting, Dianta Hapitanur, Dinda Heri Hardiyanti Jan Setiawan Kurniawan, Ova Lubi, Ahmad Maman Kartaman Ajiriyanto Mansor, Muhd Ridzuan Mashadi Nanang Sudrajat, Nanang Notonegoro, Hamdan Akbar Nurlaela, Ai Nurlela, Ai Permata Sari, Intan Putri, Ananda Alifia Rahman, Ikhwan Nur Ramlan Rhye, Jong-Soo Rohim, Fahmi Rosika Kriswarini Royhanun Athiyyah Ruliyanta Ruliyanta Saptari, Sitti Ahmiatri Seong-Cho Yu, Seong-Cho Simbolon, Silviana Suhk-Kun Oh, Suhk-Kun Syamsuir, Syamsuir Taryana, Yana Taufiq Al Farizi Tihera, Dinda Tony Kristiantoro, Tony Toto Sudiro Tri Yulianto Umi Pratiwi Wahyujati, Wardani Indah Wen-Zhe Nan, Wen-Zhe Yudanto, Sigit Dwi Yunasfi Yuniarti, Elvan

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