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All Journal Jurnal Ilmu Dasar BERKALA SAINSTEK Jurnal Sains Dasar GRADIEN JFA (Jurnal Fisika dan Aplikasinya) UNEJ e-Proceeding Jurnal Penelitian Pendidikan IPA (JPPIPA) Warta Pengabdian Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Journal of Fibers and Polymer Composites Newton-Maxwell Journal of Physics InSTEM
Endhah Purwandari
Physics Department, Faculty Of Mathematics And Natural Sciences, Jember University
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Other

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Application of Magneto-optical Characteristic in Liquid: Verdet Constant as Quality Indicator of Repeatedly Cooking Oil Sari, Silfiana Puspita; Misto, Misto; Purwandari, Endhah
BERKALA SAINSTEK Vol 9 No 1 (2021)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v9i1.19074

Abstract

The Faraday Effect is a magnetooptical phenomenon in physics describing the interaction of light and magnetic fields in a medium. A parameter that indicates the interaction is the Verdet constant. In this research, Verdet constant was measured on cooking oil that has been used several times. Magneto-optical properties were measured using the polarimetry method, which uses a He-Ne Laser beam with a magnetic field treatment of 50 gauss, 80 gauss and 100 gauss. The samples analyzed were bulk and non-bulk cooking oil. Repeated use of cooking oil causes a change in the polarization axis of the polarized laser. This has an impact on the Verdet constant of the material. The difference in the Verdet constant shows that the Verdet constant can be used as an indicator of cooking oil that has been used up to three times.
Validasi Kode OpenMC pada Reaktor Gas Berpendingin Helium Berbahan Bakar UC-PuC Karomah, Iklimatul; Syarifah, Ratna Dewi; Trianti, Nuri; Arkundato, Artoto; Rohman, Lutfi; Maulina, Wenny; Purwandari, Endhah; Hidayat, Umar Sahiful
Newton-Maxwell Journal of Physics Vol. 4 No. 1: April 2023
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/nmj.v4i1.26998

Abstract

Validasi perhitungan kekritisan pada Gas Cooled Fast Reactor (GFR) menggunakan kode OpenMC dan SRAC telah dilakukan. OpenMC merupakan kode analisis neutronik yang bersifat open source dan probabilistik yang sedang dikembangkan oleh MIT hingga sekarang. Validasi kode OpenMC perlu dilakukan untuk menunjukkan hasil validitas perhitungan OpenMC dibandingkan dengan kode lainnya. OpenMC yang bersifat probabilistik, mensimulasikan random sampling partikel yang berjumlah besar. Hal terseut bertujuan untuk menunjukkan akurasi perhitungan OpenMC dengan menggunakan partikel yang berjumlah kecil. Validasi dilakukan dengan melihat selisih perhitungan nilai  dari kode OpenMC dan SRAC. Nilai konvergensi yang dihasilkan dari kode OpenMC dan SRAC dikatakan tervalidasi dengan memiliki nilai error <1%. Pada penelitian ini menggunakan 50.000 partikel dengan total pengulangan 100 batch aktif dan 30 batch tidak aktif yang disimulasikan. Hasil perbandingan menunjukkan bahwa OpenMC memiliki error maksimal 0,06% terhadap hasil perhitungan kode SRAC
Project-Based Learning in Smart Solar Panel System for Analysis 21st Century Skills Ihtiari Prastyaningrum; Pramudya Ardi; Endhah Purwandari; Wahyu Hidayat
Jurnal Penelitian Pendidikan IPA Vol 10 No 9 (2024): September
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i9.7639

Abstract

Collaboration and communication are two types of 21st-century skills that are very important for students to have. By having good communication and collaboration skills, students can build a wider network in the future, which is useful to support their lives. Students' communication and collaboration skills can be known through various activities, one of which is the involvement of students in project-based learning. The purpose of this study is to determine the effect of a modified project-based learning model on students' collaboration and communication skills. The project-based learning that we did focused on the project of making a smart solar system. This research is a type of development research, with a mixed method research method. We developed a modified project-based learning model. The data collection process was carried out by conducting in-depth interviews, and in-depth observations, supported by literature studies. In addition, we also used a measurement questionnaire to provide a numerical assessment of students' collaboration and communication skills. Based on the research conducted, we found that the modified project-based learning model can be used to determine the extent of students' communication and collaboration skills. Where the measurement results show good criteria in some indicators and sufficient on several other indicators.
Determining the Deposition Rate of Semiconducting Intrinsic Layer Prepared by Nanospray Method: Aulia Anisa Firdaus, Endhah Purwandari, Retno Asih, Ahmad Sholih, Darminto Darminto Aulia Anisa Firdaus Aulia Anisa Firdaus; Endhah Purwandari Endhah Purwandari; Retno Asih Retno Asih; Ahmad Sholih Ahmad Sholih; Darminto Darminto
Jurnal Fisika dan Aplikasinya Vol 19 No 2 (2023): June 2023 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v19i2.16559

Abstract

Amorphous carbon (a-C) film provides potential ability as an i-type layer in semiconductor material for photovoltaic purposes due to its tunable properties. Here, we investigate how to get the deposition rate estimation of the thickness and homogenous surface of a-C film as an i-type in solar cell applications. The a-C was prepared from palmyra liquid sugar using nebulizer as a nanospray method. The thick palmyra liquid sugar was carbonized at 250 C for 2.5 hours then continued at 300 C for 2 hours to obtain high-carbon charcoal. The thickness was examined using a SEM cross section, and the amorphous phase was measured using XRD. The amorphous characteristic of a-C is confirmed by broad peaks in XRD patterns. The thickness of a-C films was found to be thinner than in a previous study that used a similar materials and methods but different equipment in the deposition process. The average thickness of a-C films is in the range of 200 to 450 nm, followed by an increase in the deposition time of 5 to 25 s. By these value, the deposition rate estimation was obtained using extrapolation linier method from the SEM result around 11.62 nm/s. This result can be used as a reference to make various thicknesses for the i-layer in order to find the maximum thickness that gives high efficiency to amorphous carbon film.
Perbandingan Citra Hasil Rekonstruksi Metode Newton-Raphson dan Landweber pada Electrical Capacitance Tomography: Analisis Resolusi dan Akurasi: Rifang Pri Asmara, Agung Tjahjo Nugroho, Endhah Purwandari Rifang Pri Asmara Rifang Pri Asmara; Agung Tjahjo Nugroho Agung Tjahjo Nugroho; Endhah Purwandari Endhah Purwandari
Jurnal Fisika dan Aplikasinya Vol 16 No 1 (2020): January 2020 Edition
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i1.5238

Abstract

Penelitian untuk membuat desain Electrical Capacitance Tomography dilakukan menggunakan metode numerik Finite Difference Method (FDM) untuk forward problem dan ditentukan tingkat akurasinya terhadap metode analitik. Solusi berbasis FDM yang diperoleh, digunakan dalam proses rekonstruksi menggunakan metode Landweber dan Newton-Raphson. Perbandingan citra hasil rekonstruksi dari kedua metode dianalisis berdasarkan resolusi dan akurasi citra yang dihasilkan. Hasil penelitian ini menunjukkan bahwa akurasi Finite Difference Method dengan melakukan pemotongan garis pada objek domain, didapatkan 90,57% pada garis horizontal dan 87,43% pada garis vertikal. Adapun hasil untuk rekonstruksi didapatkan akurasi proses rekonstruksi 98% untuk Newton-Raphson dan 88% untuk Landweber. Resolusi citra yang direkonstruksi dengan menggunakan Newton-Raphson mampu membedakan 2 benda dengan jarak pisah minimal 3 cm, sedangkan Landweber mampu membedakan 2 benda dengan jarak pisah minimal 8 cm.
Effect of Hair Particle Filler on the Characteristics of Green Composite Based on Bacterial Cellulose Umi Lailatul Jamilah; Endhah Purwandari; Sujito Sujito
Journal of Fibers and Polymer Composites Vol. 5 No. 1 (2026): Journal of Fibers and Polymer Composites
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jfpc.v5i1.563

Abstract

The growing demand for sustainable materials and effective waste management has encouraged the development of environmentally friendly composites. Green composites are a promising alternative to conventional materials for environmental preservation. In this study, bacterial cellulose derived from nata de coco was used as a matrix, while haircut waste particles served as a filler. Composites were fabricated via compression molding at 170 °C with filler contents of 0, 15, 25, 35, and 45 wt.%. The synthesized materials were characterized through tensile testing, scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) spectroscopy. Increasing hair-particle content increased the elastic modulus from 44.11 ± 3.02 MPa (A1) to 130.46 ± 4.94 MPa (A2), indicating enhanced stiffness of the composite; however, further increases in filler content slightly reduced the modulus due to possible void formation and weaker interfacial adhesion. In contrast, the tensile strength decreased progressively from 11.54 ± 0.56 MPa (A1) to 5.16 ± 0.52 MPa (A5) with increasing filler content. SEM observations revealed the formation of voids and weaker matrix–filler interactions at higher filler contents, which contributed to the reduction in tensile strength. FTIR spectra showed the presence of O–H, C–H, and C=O functional groups, suggesting possible interactions between bacterial cellulose and hair particles. Overall, a filler content of 15 wt.% provides the best balance between stiffness and structural integrity, demonstrating the potential of hair waste as a sustainable reinforcement in bacterial cellulose-based green composites.
Co-Authors Aan Ubaidillah Agung Tjahjo Nugroho Ahmad Sholih Ahmad Sholih Ahmad Sholih Arry Y. Nurhayati Artoto Arkundato Aulia Anisa Firdaus Aulia Anisa Firdaus Aulia Anisa Firdaus Bintoro Siswo Nugroho Darminto . Darminto Darminto Darminto Darminto Dewi, Yuningtyas Nely Kusuma Edi Supriyanto, Edi Edy Supriyanto Endang Haryati Fachry Abda El Rahman Firdaus, Aulia Anisa Greta Andika Fatma Hanim Munawaroh Hidayat, Umar Sahiful Ihtiari Prastyaningrum Imam Wahyudi Indrawan, Imam Wahyudi Imanullah, Muhammad Abdul Bashar Karomah, Iklimatul Khoirul Anwar Lutfi Rohman Misto Misto Misto Musyarofah, L. Ni’mah, Khiptiatun Pramudya Ardi Putra, Fikri Abdi Retno Asih Retno Asih Retno Asih Retno Asih, Retno Rifang Pri Asmara Rifang Pri Asmara Rifang Pri Asmara S. Sujito Sari, Silfiana Puspita Sholih, Ahmad Siti Lailatul Arofah Soleha, Imroatus Supriyadi Supriyadi Syarifah, Ratna Dewi Toto Winata Trianti, Nuri Umi Lailatul Jamilah Wahyu Hidayat Wenny Maulina Yudi Aris Sulisitiyo Yuniarsih, Rahayu Setyo