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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 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 Jurnal Kumparan Fisika Jurnal Eduscience (JES) Indonesian Review of Physics (IRiP) Journal of Multidisciplinary Applied Natural Science Ethnomathematics Journal Makara Journal of Science Jurnal Ilmu Fisika dan Terapannya (JIFTA) Jurnal Pendidikan MIPA
Wipsar Sunu Brams Dwandaru
Universitas Negeri Yogyakarta
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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Kajian efek Mpemba pada pendinginan air keran yang awalnya dipanaskan secara infinitesimal Founda Noviani, Elisabeth Pratidhina; Setiawan, Arif; Dwandaru, Wipsar Sunu Brams
Jurnal Sains Dasar Vol 2, No 2 (2013): October 2013
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v2i2.3291

Abstract

Abstract   The purpose of this research is to know whether in the cooling process of tap water that is initially heated infinitesimally follow the Mpemba effect or not. The sample that is used in this research is tap water from a uniform source. The control variables are freezer temperature, the content of water, volume of water, and type of water. Two variations are done on the sample, i.e. the water is initially heated infinitesimally and the water is not heated. Both samples are cooled together in a freezer. For some period of time their temperature is measured. The experiment is repeated nine times. Based on the analysis, water that is initially heated infinitesimally takes shorter time to reach zero centigrade than water that is initially unheated. The cooling graph of water that is initially heated infinitesimally intersects the cooling graph of water that is initially unheated. The intersection lies between 5.5oC until 26.5o C. From all parameters that are obtained from the data analysis, it can be concluded that the Mpemba effect occurs consistently in the cooling process of tap water that is initially heated infinitesimally.   Key words: Mpemba effect, freezing, tap water, infinitesimal heating, cooling, time
Preparation and Synthesis of Micro-Sized Carbon Material from Coconut Shell with Variation of Material Mixing Time Using a Blender for Fe Filtration of Mataram Canal Water Hastuti, Irnawati Widya; Andriani, Nur Baeity; Pratama, Buki Wahyu; Dwandaru, Wipsar Sunu Brams
Omega: Jurnal Fisika dan Pendidikan Fisika Vol 3 No 2 (2017)
Publisher : Program Studi Pendidikan Fisika UHAMKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31758/OmegaJPhysPhysEduc.v3i2.50

Abstract

This study aims to synthesis micro-sized carbon material from coconut shell leftovers or wastes using piezoelectric-based ultrasonication in liquid phase. The micro-sized carbon material produced is then utilized as a filtration material for Mataram canal water in Yogyakarta. This study begins with synthesizing the micro-sized carbon material by mixing i) mashed coconut shells, ii) 100 ml distilled water, and iii) 2 grams of detergent into a blender. The aforementioned materials are blended with mixing time variation of 30 minutes and 60 minutes. The resulted solution is left alone for a night and then ultrasonicated for 4 hours. The solution is then characterized using UV-Vis spectrophotometer. The sediments obtained from the carbon materials are characterized using X-ray diffraction (XRD) for each mixing time variation whereas scanning electron microscopy (SEM) is conducted upon the micro-sized carbon material with 60 minutes mixing time. The solution and the sediment is poured onto a filter paper, heated until dry, and fitted to a simple filtration device. Water from Mataram canal is used to test the Fe filtration ability of the micro-sized carbon material. The water samples before and after filtration are characterized using atomic absorption spectroscopy (AAS). The UV-Vis results show that increasing the mixing time of material, increases the absorbance value. Based on XRD results the synthesized micro-sized carbon material from coconut shell has an amorphous phase. The SEM result at 60 minutes of mixing time looks like an irregular bulk material with sizes of about 1 $\mu$m to 12 $\mu$m with thicknesses of around 0.6 $\mu$m to 0.8 $\mu$m. The AAS results indicate that the longer the mixing time, the lower the Fe content in the water samples after filtration.
OPTICAL PROPERTIES COMPARISON OF CARBON NANODOTS SYNTHESIZED FROM KANGKUNG (IPOMOEA AQUATICA) WITH DEEP FRYING AND ROASTING TECHNIQUES Dwandaru, Wipsar Sunu Brams; Fauzi, Fika; Sari, Dyah Silviana; Sari, Emi Kurnia; Santoso, Iman; Suhendar, Haris
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 9, No 2 (2019)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v9n2.p123-131

Abstract

Carbon nanodots (Cdots) have many unique properties such as luminescence that can be utilized in various fields. The purposes of this study are to synthesize Cdots from kangkung (Ipomoea aquatica) through frying and roasting techniques and compare the optical properties of the Cdots using UV-Vis, PL, and FTIR. Three stages of synthesizing process of Cdots, i.e.: preparing the kangkung powder (root, stem, leaf) and synthesizing the Cdots through frying and roasting techniques. Each part (root, stem, and leaf) was heated in an oven at 250 oC for 2 hours and mashed into powder. The frying method was done by frying 15 g of the powder in 120 ml oil for 5 minutes at 88 oC, filtered, and dissolved in n-hexane. In addition, the roasting method was done by frying the powder without oil as much as 15 g for 5 minutes, dissolved in 120 ml of distilled water, and then filtered. The UV-Vis characterization showed one absorbance peak for Cdots via frying and roasting techniques at 293 nm to 296 nm and 262 nm to 282 nm, respectively. The Cdots through frying and roasting techniques produce red and green luminescence, respectively. The FTIR characterization showed the presence of C=C and C=O functional groups, which are the core and surface state of the Cdots by frying technique, while the samples via roasting technique showed only the core. It can be concluded that the Cdots samples obtained from frying and roasting methods have different optical properties. The frying method produces Cdots with longer wavelength at the absorbance peak in the UV-Vis test compared to the roasting method. Moreover, the frying and roasting methods produce different color luminescence.
Integrasi Project Based Learning dalam Science Technology Engineering and Mathematics untuk Meningkatkan Keterampilan Proses Sains dalam Pembelajaran Fisika Jatmika, Surya; Lestari, Sri; Rahmatullah, Rahmatullah; Pujianto, Pujianto; Dwandaru, Wipsar Sunu Brams
Jurnal Pendidikan Fisika dan Keilmuan (JPFK) Vol 6, No 2 (2020)
Publisher : UNIVERISTAS PGRI MADIUN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/jpfk.v6i2.8688

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh project based learning (PjBL) berbasis science technology engineering and mathematics (STEM) terhadap kemampuan keterampilan proses sains peserta didik dalam pembelajaran Fisika. Penelitian ini menggunakan rancangan pre-experiment dengan jenis one-group pretest-postest design. Penelitian ini menggunakan satu kelompok (kelas) dengan teknik pengambilan sample random (acak). Kelas yang digunakan, yaitu kelas X MIPA 4 di SMA N 1 Yogyakata.  Responden penelitian sebanyak 36 peserta didik. Hasil analisis menunjukkan bahwa terjadi peningkatan hasil tes awal dan tes akhir. Semua indikator keterampilan proses sains yang diukur juga mengalami peningkatan. Peningkatan yang terjadi termasuk dalam kategori sedang. Hasil analisis uji-t one group pretest and posttest menunjukkan bahwa model PjBL terintegrasi STEM mempengaruhi keterampilan proses sains peserta didik. Berdasarkan hasil angket tanggapan peserta didik terhadap penerapan PjBL berbasis STEM secara keseluruhan sebesar 78,21%. Hasil ini menunjukkan bahwa penggunaan model PjBL terintegrasi STEM dalam pembelajaran fisika memberikan pengaruh positif terhadap keterampilan proses sains peserta didik.
Carbon Dots Synthesized from Tofu Pulp for Liquid Tofu Waste Photo-degradation Nurohman, Yosi; Pratidhina, Elisabeth; Sari, Emi Kurnia; Dwandaru, Wipsar Sunu Brams
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

Abstract

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.
A computerized adaptive test for measuring the physics critical thinking skills in high school students Aang Zainul Abidin; Edi Istiyono; Nunung Fadilah; Wipsar Sunu Brams Dwandaru
International Journal of Evaluation and Research in Education (IJERE) Vol 8, No 3: September 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (693.474 KB) | DOI: 10.11591/ijere.v8i3.19642

Abstract

Classical assessments that are not comprehensive and do not distinguish students' initial abilities make measurement results far from the actual abilities. This study was conducted to produce a computerized adaptive test for physics critical thinking skills (CAT-PhysCriTS) that met the feasibility criteria. The test was presented for the physics subject of 11th grade high school students with two-tier multiple-choice format. This development research was based on the 4-D model combined with the test development model by Oriondo & Antonio. Eleven experts and 577 11th grade high school students in Kulonprogo, Indonesia, have participated. The media feasibility and the content validity of the items was assessed by experts, while item and abilities parameters were estimated by item response theory. The results obtained: 1) CAT media was declared very feasible and content validity of 136 items was declared valid; 2) all items fitted to partial credit model, the item reliability was classified as good, and the difficulty index of items was good; 3) the results of the CAT-PhysCriTS were equivalent to students academic achievement. Based on the results, CAT-PhysCriTS has fulfilled the requirements as a measuring instrument with measurement times were faster and more comprehensive for large-scale assessments.
Simple Investigation on the Optical Properties of Carbon Nanodots Using Lasers and a Lux Meter Febriani Febriani; Athi' Nur Auliati Rahmah; Bian Itsna Ashfa Al Ashfiya; Juli Astono; Wipsar Sunu Brams Dwandaru
Jurnal Fisika dan Aplikasinya Vol 18, No 1 (2022)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v18i1.11005

Abstract

Carbon nanodots (Cdots) have excellent optical properties. This study aims to investigate scattering and absorption of Cdots via simple exposure of ultraviolet (UV)/violet, red, and green lasers. The experiment was conducted by preparing the Cdots from cajuput oil distillation wastes as the precursor. The solid wastes were dried under the sun, grounded into powder, filtered, and carbonized inside an oven at 250 oC for one hour. The carbonized powder was then mixed with distilled water, left for a night, and then filtered again so that the Cdots solution was obtained. Here, the mass of the precursor was varied. The Cdots samples were characterized using ultraviolet-visible (UV-Vis) and photoluminescence (PL) spectroscopies, and also particle size analyzer (PSA). The lasers were directly exposed to the Cdots samples. A digital lux-meter was used to measure the intensity of the lasers transmitted from the sample. The angle of the lux-meter was varied on a circular track. The sample was on the center of the track. The UV-Vis characterization showed two peaks at 217 nm and 270 nm, and a tail extending to the visible region. The PL characterization showed an intensity peak at 509.57 nm, which confirms the cyan luminescence of the Cdots. The PSA characterization indicated that the size of the Cdots was 1.04 nm. Moreover, at an angle of 0o, the UV wavelength was strongly absorbed by the Cdots in accordance with the UV-Vis characterization result. The intensity of the green laser also dominates as it was less absorbed and strongly scattered by the Cdots.
AUDIO BIO HARMONIC WITH WT5001 SMARTCHIPUSING SOLAR CELL Nur Kadarisman; Fitria Ayu Sulistiani; Wipsar Sunu Brams Dwandaru; Rhyko Irawan Wisnuwijaya; Agus Sugiarto
Jurnal Fisika dan Aplikasinya Vol 16, No 2 (2020)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v16i2.3750

Abstract

The design of audio bio harmonic (ABH) with smartchip WT5001 using solar cell technology in the form of ABH instrumentation with an electricity resource derived from solar energy has been successfully created and tested, which includes (i) testing the peak frequency of sound and sound output, and (ii) emptying and charging tests to determine the effectiveness of the use of the solar cell as the power provider. The ABH system consists of (i) a sound generator device composed of WT5001 sound modules, amplifiers, and horn speakers, and (ii) structured power supply devices for solar cell modules, charger controllers, and batteries for storing power. The test results of the peak frequency for the insect (garengpung) sound files and the output sound of the ABH device indicate a deviation of peak frequency of 13.46 Hz to140.81 Hz. The 15 hours emptying test results in on mode with battery charging for 7 hours shows that the use of 10Wp solar cell is effective to provide electrical power in ABH tool operation.
model kekisi untuk fluida dengan interaksi wipsar sunu brams dwandaru
Jurnal Sains Fisika dan Terapannya Vol 1
Publisher : Jurnal Sains Fisika dan Terapannya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (11.365 KB)

Abstract

telah dipelajari model kekisi untuk fluida dengan interaksi.
WEBSITE-BASED TECHNOLOGICAL PEDAGOGICAL AND CONTENT KNOWLEDGE FOR LEARNING PREPARATION OF SCIENCE TEACHERS Insih Wilujeng; Nugan Tadeko; Wipsar Sunu Brams Dwandaru
Jurnal Cakrawala Pendidikan Vol 39, No 3 (2020): CAKRAWALA PENDIDIKAN, VOL. 39, NO. 3, OCTOBER 2020
Publisher : LPMPP Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/cp.v39i3.31228

Abstract

This study produces technological pedagogical and content knowledge (TPACK) instruments, which conventionally use print modules. The aims of this study were 1) to develop appropriate website-based TPACK instruments, and 2) to determine the effect of the produced website-based TPACK instruments toward the pedagogy competence of Science teachers in their learning preparation in the classroom. The methodology used was based on the ADDIE stages which stand for analyze, design, develop, implement, and evaluate. The results of this study include 1) instructions for producing TPACK instruments based on the results of synthesis; 2) instructions for making a website format based on the synthesis results; 3) TPACK framework design in website content; 4) TPACK instruments validation results; and 5) website validation results. Moreover, limited and field tests were conducted upon the website-based TPACK instruments to determine their effect toward the pedagogy competence of Science teachers.  Quantitatively, the TPACK instruments scored 70 out of 76, while the website scored 60 out of 90. Finally, the limited and field tests results showed that website-based TPACK instruments positively affect the pedagogy competence of Science teachers in their learning preparation in the classroom with an overall Good category and a Very Good category for the usage evaluation from the users.
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 Andriani, Nur Baeity Annisa Indriawati Aprilia, Ananda Aprina Defianti Aprlilia, Ananda Arif Rahman Aris Kurniawan Ariswan Ariswan 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 Balqist, Eggydhia Ananda Rania Bambang Ruwanto Bambang Ruwanto, Bambang Bian Itsna Ashfa Al Ashfiya Bob Widodi Buky Wahyu Pratama Danvi Sekartaji Denny Darmawan Denny Darmawan Dhiarni, Yutisa Is Dian Puspita Eka Putri Dian Puspita Eka Putri Duden Saepuzaman, Duden Dwi Wahyu Nugroho Dyah Silviana Sari Edi Istiyono Elisabeth Pratidhina Elisabeth Pratidhina Emi Kurnia Sari Eryuni Setyani Fajrul Falah Fauzi, Fika Febriani Febriani Febriani Fika Fauzi Fitria Ayu Sulistiani Fitria Irawan Fitria Wulandari Galih Ramadhan Alwaasith Hari Sutrisno Haris Suhendar Hastuti, Irnawati Widya Heru Kuswanto 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 Mustofa, Nisrina Hasna Nasir, Muhammad Hilmi Niken Kristiyanti 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 R. Yosi Aprian Sari 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 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 Tullah, Hidayat Ulfa Aulia Syamsuri Utami, Ridho Warsono Warsono Warsono Warsono Warsono Watuna, Monica Ananda Wiratama, Pradeo Putra Wisnuwijaya, Rhyko Irawan Yosi Nurohman Yusman Wiyatmo Yusron, Eri Yuwana Widada Zakwandi, Rizki