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All Journal International Journal of Evaluation and Research in Education (IJERE) Jurnal Fisika dan Pembelajarannya Cakrawala Pendidikan Jurnal Penelitian dan Evaluasi Pendidikan Jurnal Civics: Media Kajian Kewarganegaraan Jurnal Ilmiah WUNY POSITRON Jurnal Penelitian Fisika dan Aplikasinya (JPFA) EDUSAINS Jurnal Sains Dasar Jurnal Sains dan Teknologi JURNAL FISIKA Journal of Mathematical and Fundamental Sciences JFA (Jurnal Fisika dan Aplikasinya) Omega: Jurnal Fisika dan Pendidikan Fisika REiD (Research and Evaluation in Education) JIPF (Jurnal Ilmu Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Pendidikan Fisika dan Keilmuan (JPFK) Spektra: Jurnal Fisika dan Aplikasinya Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Kasuari: Physics Education Journal (KPEJ) Jurnal Kumparan Fisika Jurnal Eduscience (JES) Indonesian Review of Physics (IRiP) Journal of Multidisciplinary Applied Natural Science Ethnomathematics Journal Kaunia: Integration and Interconnection of Islam and Science Journal Makara Journal of Science Jurnal Ilmu Fisika dan Terapannya (JIFTA) Jurnal Pendidikan MIPA

Wipsar Sunu Brams Dwandaru

Department Of Physics Education, Universitas Negeri Yogyakarta

Author-ID : 256169

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Pelatihan pembuatan sabun cuci tangan dari ekstrak daun jambu air dan nanopartikel perak bagi masyarakat Desa Widodomartani, Ngemplak, Sleman Ariswan Ariswan; Rita Prasetyowati; Warsono Warsono; Suparno Suparno; Fika Fauzi; Wipsar Sunu Brams Dwandaru
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol 5, No 1 (2021): Vol 5, No 1 (2021)
Publisher : Yogyakarta State University

AbstrakKegiatan pengabdian kepada masyarakat (PPM) ini bertujuan untuk melatih masyarakat Widodomartani, Ngemplak, Sleman untuk membuat sabun cuci tangan dengan bahan ekstrak daun jambu air dan nanopartikel perak. Kegiatan PPM ini juga memberikan pendampingan pemberdayaan masyarakat desa Widodomartani, Ngemplak, Sleman agar dapat meningkatkan keterampilan membuat sabun cuci tangan. Tim PPM melaksanakan pelatihan yang meliputi dua kegiatan yaitu, 1) pemaparan materi tentang manfaat membuat sabun cuci tangan dan teknologi pembuatan sabun cuci tangan; pelatihan membuat sabun cuci tangan dari ekstrak daun jambu air dan nanopartikel perak; dan 2) pendampingan pembuatan sabun cuci tangan kepada masyarakat desa Widodomartani, Ngemplak, Sleman. Hasil yang dicapai dari kegiatan PPM ini adalah peserta PPM dari masyarakat desa Widodomartani, Sleman memperoleh bekal tentang langkah-langkah konkret pembuatan sabun cuci tangan dari ekstrak daun jambu air dan nanopartikel perak dan pendampingan dalam praktek pembuatan sabun cuci tangan tersebut. Sehingga masyarakat tersebut dapat memaksimalkan pemanfaatan daun jambu air dan nanopartikel perak guna memproduksi sabun cuci tangan. Kata Kunci: sabun cuci tangan, ekstrak daun jambu air, nanopartikel perak

Carbon Dots Synthesized from Tofu Pulp for Liquid Tofu Waste Photo-degradation Yosi Nurohman; Elisabeth Pratidhina; Emi Kurnia Sari; Wipsar Sunu Brams Dwandaru
Indonesian Review of Physics (IRiP) Vol. 4 No. 1 (2021)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v4i1.3327

This study was aimed to prepare and characterize carbon dots (CDs) from tofu pulp for liquid tofu wastes photo-degradation. The tofu pulp was dried, heated in an oven for an hour at 250 oC, mashed into powder, weighted as much as (g) 1; 2; 3; 4; and 5, dissolved into 100 ml distilled water, filtered, and characterized using UV-Vis, PL, and FTIR. The photo-degradation experiment was conducted for pure waste, waste + CDs, and waste + CDs + UV light, then the BODs were measured. The CDs reduced the wastes to 14.29% and 53.90% without and with UV light, respectively. The pure wastes, wastes + CDs, and wastes + CDs + UV light produced BOD values of (mg/l) 385; 200; and 135, respectively. The decrease in BOD showed that CDs with and without UV light successfully restore dissolved oxygen in the wastes.

Comparison of Euler and Euler-Cromer Numerical Methods for Undamped and Damped Spring Oscillation Nurul Miftakhul Janah; Fajrul Falah; Ratnawati; Ishafit; Wipsar Sunu Brams Dwandaru
Indonesian Review of Physics (IRiP) Vol. 4 No. 2 (2021)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v4i2.4803

This study aimed to numerically analyze damped and undamped oscillations of a spring using the Euler and Euler-Cromer methods via Spreadsheet software. The varied parameters in this study were the damping constant, namely 0.1 (damped) and 0.0 (undamped). Various quantities analyzed in this study were position (x), velocity (v), kinetic energy (K), potential energy (U), mechanical energy (E), and phase space as a function of time (t). Iteration was done in t < 60-time steps (seconds). The results of this study indicated that when the spring experiences damping, the numerical results of x, v, K, U, E, and the phase space decrease periodically to zero due to the damping force, both for the Euler and Euler-Cromer methods. Meanwhile, for the undamped spring (zero damping constant), there was a difference in the results for the Euler and Euler-Cromer methods. For the Euler method, the resulting values of x, v, K, U, E, and the phase space increased periodically with time, which was not following the actual situation. According to the simple harmonic oscillation, the Euler-Cromer method values of x, v, K, U, E, and the phase space were stable over time.

Pelatihan Pembuatan Sabun Cuci Tangan dari Nanopartikel Perak bagi Guru Fisika SMA di Lingkungan MGMP Gunungkidul Yogyakarta Ariswan Ariswan; Rita Prasetyowati; Wipsar Sunu Brams Dwandaru; Warsono Warsono; Suparno Suparno; Fika Fauzi
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol 6, No 2 (2022): Vol 6, No 2 (2022)
Publisher : Yogyakarta State University

Kegiatan pengabdian kepada masyarakat (PkM) ini bertujuan untuk melatih para guru Fisika Sekolah Menengah Atas (SMA) perwakilan MGMP Kabupaten Gunungkidul, Daerah Istimewa Yogyakarta (DIY) untuk membuat sabun cuci tangan dengan bahan tambahan nanopartikel perak (AgNP). Pelatihan ini diharapkan dapat memperluas wawasan dan keterampilan para guru Fisika dalam menyintesis material nano, yaitu AgNP dan pemanfaatannya dalam pembuatan sabun cuci tangan. Wawasan dan keterampilan ini nantinya dapat diteruskan kepada peserta didik di sekolah masing-masing di kawasan kabupaten Gunungkidul. Tim PkM melaksanakan pelatihan yang meliputi dua kegiatan, yaitu: 1) kegiatan daring yang berisi pemaparan materi tentang teknologi pembuatan sabun cuci tangan dan 2) praktik membuat AgNP dan membuat sabun cuci tangan yang ditambah bahan AgNP untuk para guru Fisika SMA di lingkungan MGMP Gunungkidul. Hasil yang dicapai dari kegiatan PkM ini adalah peserta PkM dari MGMP Gunungkidul memperoleh pengetahuan tentang langkah-langkah konkret pembuatan AgNP dan pembuatan sabun cuci tangan dengan bahan tambahan AgNP.

Morphological and Structural Studiesof ZnO Micro-Nanorod Structures Synthesized Using a Low-Cost Hydrothermal Method Alfarisa, Suhufa; Toruan, Parmin Lumban; Atina, Atina; Dwandaru, Wipsar Sunu Brams; Safitri, Rika Noor
Makara Journal of Science Vol. 22, No. 2
Publisher : UI Scholars Hub

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

Micro-nanorod structuresof zincoxide (ZnO) have been successfully synthesized via a simple and low-cost hydrothermal method. ZnO solutions with different concentrations of 0.05 and 0.1 M were prepared using zinc nitrate tetrahydrate and hexamethylenetetramine precursors. They were dissolved inaquadesand stirred before the hydrothermal process at 95 °C for 4 hours in an oven. Extensive characterizations using scanning electron microscope (SEM) and X-ray diffraction (XRD) were conductedon ZnO powder samples. SEM results showed that hexagonally shaped ZnO micro-nanorods were formed with diameters ranging from hundreds of nanometers to several micrometers. The ZnO sample synthesized at 0.05 M was observedto have a better surface morphological structurethan the 0.1 M sample. In addition, XRD measurements confirmed that samples exhibited a hexagonal crystal structure of ZnO. Moreover, the calculated crystallite sizes of ZnO using the Debye-Scherrer equation using the full-width half maxima of the XRD peaks were 25.153 nm for the 0.05 M sample and 28.707 nm for the 0.1 M sample. The most prominent growth of ZnO had 101 plane orientation or nonpolara-plane followed by nonpolar 100 m-plane and 002 polar c-plane orientations.This studyoffersa simple andlow-costroute to producehigh-quality ZnO micro-nanorods for use in various electrical and optical devices.

Density Profiles, Energy, and Oscillation Strength of a Quantum Dot in Two Dimensions with a Harmonic Oscillator External Potential using an Orbital-free Energy Functional Based on Thomas–Fermi Theory Alfarisa, Suhufa; Dwandaru, Wipsar Sunu Brams; Darmawan, Denny
Makara Journal of Science Vol. 20, No. 1
Publisher : UI Scholars Hub

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This research aims i) to determine the density profile and calculate the ground state energy of a quantum dot in two dimensions (2D) with a harmonic oscillator potential using orbital-free density functional theory, and ii) to understand the effect of the harmonic oscillator potential strength on the electron density profiles in the quantum dot. This study determines the total energy functional of the quantum dot that is a functional of the density that depends only on spatial variables. The total energy functional consists of three terms. The first term is the kinetic energy functional, which is the Thomas–Fermi approximation in this case. The second term is the external potential. The harmonic oscillator potential is used in this study. The last term is the electron–electron interactions described by the Coulomb interaction. The functional is formally solved to obtain the electron density as a function of spatial variables. This equation cannot be solved analytically, and thus a numerical method is used to determine the profile of the electron density. Using the electron density profiles, the ground state energy of the quantum dot in 2D can be calculated. The ground state energies obtained are 2.464, 22.26, 90.1957, 252.437, and 496.658 au for 2, 6, 12, 20, and 56 electrons, respectively. The highest electron density is localized close to the middle of the quantum dot. The density profiles decrease with the increasing distance, and the lowest density is at the edge of the quantum dot. Generally, increasing the harmonic oscillator potential strength reduces the density profiles around the center of the quantum dot.

UV-Visible Optical Absorbance of Graphene Oxide Synthesized from Zinc-Carbon Battery Waste via a Custom-Made Ultrasound Generator based on Liquid Sonication Exfoliation Method Wisnuwijaya, Rhyko Irawan; Purwanto, Agus; Dwandaru, Wipsar Sunu Brams
Makara Journal of Science Vol. 21, No. 4
Publisher : UI Scholars Hub

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The objectives of this study are i) to synthesize graphene oxide (GO) from the waste materials of zinc-carbon (ZnC) batteries via the liquid sonication exfoliation (LSE) method using tweeter piezoelectric probes as speakers, and ii) to study the optical absorbance of the GO produced using a UV-Vis spectrophotometer by varying the mass of the graphite materials obtained from ZnC battery waste. The graphite materials are obtained from the carbon rods of the ZnC batteries, which are ground into powder. The powder is then mixed with distilled water, with powder mass variations of 0.4, 0.6, 0.8, and 1.0 grams. The solutions obtained are sonicated with a frequency of 30 kHz for six hours using a custom-made ultrasound generator based on piezoelectric probes. The effect of graphite material mass variation is studied by observing the UV-Vis spectrophotometer data before and after sonication. The results of this study show absorbance peaks at wavelengths of 221 nm to 227.5 nm, and shouldering peaks at 260 nm to 270 nm, indicating the presence of GO materials for all graphite mass variations. The best GO performances based on the UV-Vis results are obtained in samples with 0.8 and 1.0 grams of graphite powder, which undergo a red shift from 223.5 nm to 227.5 nm, respectively. Scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) are conducted upon the sample of 1.0 grams of graphite powder before and after sonication treatment. The SEM results before sonication show graphite materials forming in large chunks, whereas after sonication smaller islands of GO materials consisting of thin, transparent flakes are observed. The EDX results reveal that the sample material after sonication consists of 88% carbon, 11% oxygen, and a remaining 1% of aluminum, silicon, sulphur, ferrum, and zinc

MENINGKATKAN KETERAMPILAN PROSES SISWA DENGAN MENGGUNAKAN LKS BERBASIS INKUIRI Toni Hasmedi; Wipsar Sunu Brams Dwandaru; Putri Anjarsari; Aprina Defianti
Jurnal Kumparan Fisika Vol. 5 No. 2 (2022): Agustus 2022
Publisher : Unib Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/jkf.5.2.121-130

ABSTRAK Penelitian ini bertujuan untuk meningkatkan keterampilan proses siswa dengan menggunakan LKS berbasis inkuiri. Metode penelitian yang digunakan dalam penelitian ini adalah eksperimen semu dengan rancangan nonequivalent control-group pre-test post-test design. Subjek penelitian adalah siswa SMA Negeri 2 Kota Bengkulu. Data yang diperoleh dalam penelitian ini terdiri dari data hasil tes awal, data hasil tes akhir, dan data gain standar. Hasil penelitian menunjukkan: a) berdasarkan rata-rata hasil tes awal diperoleh bahwa tidak ada perbedaan keterampilan proses siswa antara kelompok perlakuan dan kelompok kontrol; b) berdasarkan rata-rata hasil tes akhir diperoleh bahwa keterampilan proses siswa kelompok perlakuan lebih besar dari pada kelompok kontrol; c) berdasarkan rata-rata gain standar diperoleh bahwa peningkatan keterampilan proses siswa kelompok perlakuan lebih besar dari pada kelompok kontrol. Kata Kunci: Inkuiri, LKS, keterampilan proses ABSTRACT This study aims to increase sudents’ process skills after using the worksheets based on inquiry. The method of this study was quasy eksperriment with nonequivalent control-group pre-test post-test design. The subject of this study was students of SMA Negeri 2 Bengkulu. The data were oftained by tes awalt, post test, and gain standard. The results showed: a) based on the average tes awalt results showed that there was no difference between the students' process skills perlakuan group and the control group; b) based on the average post-test results showed that the students' process skills perlakuants groups is greater than in the control group; c) based on the average standard gain is obtained that increase students' process skills perlakuants groups is greater than in the control group. Keywords: Inquiry, LKS, process skills

Nanomaterial Carbon-Dots Berbahan Dasar Daun Sirih (Piper Betle L.) Sebagai Antibakteri Terhadap Bakteri S. Mutans dan E. Coli Emi Kurnia Sari; Danvi Sekartaji; Athi' Nur Auliati Rahmah; Wipsar Sunu Brams Dwandaru
POSITRON Vol 10, No 2 (2020): Vol. 10 No. 2 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Penelitian ini bertujuan untuk mensintesis, mengkarakterisasi, dan mengetahui peran nanomaterial carbon-dots (Cdots) sebagai antibakteri terhadap bakteri S. mutans dan E. coli. Cdots dibuat dengan bahan dasar daun sirih (Piper Betle L.) menggunakan metode pemanasan oven. Terdapat tiga buah sampel Cdots yang dihasilkan yaitu 0,5 g serbuk daun sirih+aquades (Cdots A), 0,5 g serbuk daun sirih+ekstrak daun sirih (Cdots B), dan 1 g serbuk daun sirih+ekstrak daun sirih (Cdots C). Ketiga sampel memiliki karakteristik yang hampir sama, yaitu adanya puncak absorbansi pada rentang panjang gelombang 257nm – 320 nm. Daya serap yang tinggi pada rentang ultraviolet (UV) merupakan salah satu sifat yang dimiliki Cdots. Selain itu, ketiga sampel Cdots memiliki pendaran biru-kehijauan (cyan) ketika dikenai laser UV.Hal ini merupakan sifat luminesensCdots yang dapat berpendar pada panjang gelombang cahaya tampak. Cdots tersusun dari core dan surface state yang masing-masing ditunjukkan dengan adanya gugus fungsi C=C dan gugus O-H serta C-O yang terdeteksi oleh uji FTIR dari ketiga sampel Cdots. Pengujian antibakteri menggunakan metode Kirby-Bauer menunjukkan sampel Cdots C memiliki aktivitas antibakteri tertinggi karena memiliki konsentrasi Cdots yang lebih banyak dan bekerja sama dengan ekstrak sirih yang memiliki sifat antibakteri sehingga berpotensi sebagai agen antibakteri dibandingkanekstrak daun sirih murni.

The Imaginary Line Across Yogyakarta Land as an Ethnomathemathics Study Febriani Febriani; Aditia Pramudia Sunandar; Ulfa Aulia Syamsuri; Wipsar Sunu Brams Dwandaru
Ethnomathematics Journal Vol 4, No 1 (2023): March
Publisher : Universitas negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ej.v4i1.59984

In attempt to explore Yogyakarta, the heritage city of Indonesia, the well known landmark, Tugu Pal Putih and the Yogyakarta Imaginary Line is explored. The purpose of this paper is to describe that this cultural context may be used as a reference for geometry learning. The method used in this research is a descriptive qualitative involving two historian experts in interviews. The results are that this line can be explored through ethnomathematics studies based on points, straight lines, comparison of distances between points on the imaginary line and the extension of the imaginary line. This line can be illustrated by an imaginary point located at the Tugu Pal Putih as the starting point to focus on thinking of the mathematical object. This line not only divides Yogyakarta imaginatively but also according to natural boundaries such as rivers. The extension of the imaginary line forms an area called the fertility area. The description of the patterns formed on the Yogyakarta Imaginary Line through ethnomathematics is expected to be used further as materials in the mathematics learning process.

Co-Authors Aang Zainul Abidin Adiella Zakky Juneid Adiella Zakky Juneid Aditia Pramudia Sunandar Adiwinoto, Nur Rahmatika Agisna Nursita AGUS PURWANTO Agus Sugiarto Alfarisa, Suhufa Alviana, Jaynis Dhifa Aminuyati Anak Agung Gede Sugianthara Ananda Aprilia Andriani, Nur Baeity Anisha Nurcahyati Annisa Indriawati Aprilia, Ananda Aprina Defianti Aprlilia, Ananda Arfa, Trirahma Novalia Putri Arif Rahman Aris Kurniawan Ariswan Ariswan Ariswan, Ariswam Asya Nailul Fauziah Athi' Nur Auliati Rahmah Atina - Atina, Atina Ayub, Made Rai Shanti Aziz, Khafidh Nur Azzahra Qurrata A’yun Bagas Prakoso Bambang Ruwanto Bambang Ruwanto, Bambang Bian Itsna Ashfa Al Ashfiya Bian Itsna Ashfa Al Ashfiya Bob Widodi Buky Wahyu Pratama Damayanti, Silva Danvi Sekartaji Denny Darmawan Dewi, Imelda Zahra Tungga Dian Puspita Eka Putri Dian Puspita Eka Putri Duden Saepuzaman, Duden Dwi Wahyu Nugroho Dyah Silviana Sari Edi Istiyono Eggydhia Ananda Rania Balqist Elisabeth Pratidhina Elisabeth Pratidhina Emi Kurnia Sari Eryuni Setyani Fajrul Falah Febriani Febriani Febriani Fika Fauzi Fitria Ayu Sulistiani Fitria Irawan Fitria Wulandari Galih Ramadhan Alwaasith Hari Sutrisno Haris Suhendar Hastuti, Irnawati Widya Heru Kuswanto Hidayat Tullah Hidayatullah, Abdul Rosyid Husna, Salsabila Iman Santoso Iman Santoso Indriawati, Annisa Insih Wilujeng Irnawati Widya Hastuti Ishafit Juli Astono Juliana Megawati Simanjuntak Julius Elfino Jumadi Jumadi Jumadi Jumadi Kartika Aulia Widyani Khasanah, Ayu Hana Umi Laeli, Silvia Laila Nur Hanif Lilik Kurniawan Lilis Misnawati Listari, Eka Sentia Ayu Millah, Syari Fatul Muhammad Ikrom Nasir, Muhammad Hilmi Niken Kristiyanti Nisrina Hasna Mustofa nosiyosa judenori Nugan Tadeko Nunung Fadilah Nur Baeity Andriyani Nur Kadarisman Nurohman, Yosi Nurul Miftakhul Janah Nurul Taufiqu Rochman Oktiana Lusi Priyani Parmin Lumbantoruan Permana, Hilmi Ardian PHATMA DIAN PRATIWI Pratama, Buki Wahyu Pratama, Buky Wahyu Pujianto Pujianto Purwanto, Agus Purwoko Haryadi Santoso Putri Anjarsari Putri, Sabrina Elysia R. A. Adipurno Rachman, Anisyah Raden Wisnu Murti Sulaindra Radyum Ikono Rahmatullah Rahmatullah Ratnawati Retnowati, Rahayu Dwisiwi Sri Revnika Faizah Rhyko Irawan Wisnuwijaya Rhyko Irawan Wisnuwijaya Rhyko Irawan Wisnuwijaya Rika Noor Safitri Rini Septiana Rita Prasetyowati Rukasih, Tina Safitri, Rika Noor Sari, Dyah Silviana Sari, Emi Kurnia Sari, Riska Arsita Septiana, Rini Silvia Nur Fatmawati Siti Choerotun Nisa’ SL, Deby Grace Sudarsono Sukardiyono Sukardiyono Sunardi Rahman Suparno Suparno Suparno Suparno Suparno Suparwoto Suparwoto Surya Jatmika Susanto, Duwi Tessa, Adhis Tito Prastyo Rahman Toni Hasmedi Toruan, Parmin Lumban Trisonia Fitria Ufairah, Ghina Syifa Ulfa Aulia Syamsuri Utami, Ridho Warsono Warsono Warsono Warsono Warsono Watuna, Monica Ananda Widayanti Widayanti Wiratama, Pradeo Putra Wisnuwijaya, Rhyko Irawan Yosi Aprian Sari Yosi Nurohman Yuflihza, Zaharani Yusman Wiyatmo Yusron, Eri Yutisa Is Dhiarni Yuwana Widada Zakwandi, Rizki

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