Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

8.903

P-Index

This Author published in this journals

All Journal Jurnal Penelitian dan Pembelajaran Fisika Jurnal Pendidikan IPA Indonesia Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Science and Technology Indonesia JIPF (Jurnal Ilmu Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) Momentum: Physics Education Journal JURNAL EKSAKTA PENDIDIKAN (JEP) JPF : JURNAL PENDIDIKAN FISIKA JURNAL PENDIDIKAN TAMBUSAI International Journal of Educational Dynamics (IJEDS) Eksakta : Berkala Ilmiah Bidang MIPA Jurnal Lentera Pendidikan Pusat Penelitian LPPM UM Metro JURNAL PENDIDIKAN MIPA Pelita Eksakta Jurnal Ilmiah Profesi Pendidikan Natural Science: Jurnal Penelitian Bidang IPA dan Pendidikan IPA Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika Al-DYAS : Jurnal Inovasi dan Pengabdian kepada Masyarakat Journal of Innovative Physics Teaching (JIPT) Physics Learning and Education Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Journal of Experimental and Applied Physics

Ratnawulan .

Departement Of Physics, Universitas Negeri Padang, Padang, 25132, Indonesia

Author-ID : 3501882

Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

Published : 102 Documents Claim Missing Document

Claim Missing Document

Articles

4 5 6 7 8

The Synthesis of CuO/Polystyrene Nanocomposite Superhydrophobic Layer using The Spin Coating Method Ratnawulan Ratnawulan; Ahmad Fauzi; Sarimai Sarimai
Science and Technology Indonesia Vol. 7 No. 2 (2022): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

This paper shows the synthesis of CuO/Polystyrene(PS) nanocomposite superhydrophobic layer using the spin coating method. The objective of this study was to determine the effect of calcination temperature on the contact angle, morphology, and energy gap of the CuO/PS nanocomposite thin layer. Preparation of copper powder into copper oxide (CuO) nanoparticles using the method of High Energy 3 Dimensional Milling (HEM-3D) for 20 hours. The calcination temperature variations used were 100◦C , 150◦C, 180◦C, 200◦C, and 300◦C. In this study, sample analysis was performed using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Ultraviolet-Visible (UV-Vis) Spectrophotometry. The contact angle was determined using the sessile drop method. The findings indicate that the calcination temperature affects the contact angle of the nanocomposite thin films the highest contact angle was obtained at 162◦ at a temperature of 200◦C. The results of SEM analysis obtained that at a temperature of 200◦C, the particle size was 62.91 nm and the particles were evenly distributed in the composite layer. The energy gap at 200◦C is 2.03 eV. We found that CuO/PS synthesized at a temperature of 200◦C was superhydrophobic.

THE EFFECT OF COOPERATIVE LEARNING MODEL USING PHET SIMULATION ON PHYSICS STUDENT’S ACHIEVEMENT nabila aulia rahma; Ratnawulan Ratnawulan; Letmi Dwiridal; Renol Afrizon
PILLAR OF PHYSICS EDUCATION Vol 16, No 1 (2023)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/14327171074

The purpose of this study was to measure students' academic skills using a group survey model using Phet.. These skills can be acquired by adopting an appropriate learning model in terms of mastery of materials and skills.. A survey was conducted at Senior High School and information was obtained that students' learning results still needed to be higher. Students' learning outcomes can be improved by using learning models and media. The solution that can be done is to apply the GO type cooperative model using PhET simulation. This research is pseudo-experimental, posttest-only design. The population of this study were all XI science classes of Senior high scholl , registered in the 2022/2023 academic year. Sampling was done using a purposive sampling technique, grade XI IPA 1 and grade XI IPA 2 classes were selected as samples. The instruments used were posttest questions for knowledge-skills observables for attitudes and skills-skills, and the research hypothesis was tested using the t-test. Research results using t-test lead to the conclusion that in students' knowledge competency, the value of Tcounts 5,279> Ttable 1,994437. Regarding attitude competency, the value of T is 11,89> Ttable 1,994437. In the skill competency, the value of Tcount is 3,3580> Ttable 1,994437. This shows that the hypothesis is accepted. So, motivating in the form of a posttest can improve the learning outcomes of physics students in Class XI IPA at Senior high school in the 2022/2023 school year.

SCIENCE LITERACY ANALYSIS OF PHYSICS INSTRUCTIONAL MATERIAL FOR SENIOR HIGH SCHOOL GRADE IN PADANG CITY BASED ON DIGITAL TECHNOLOGY Sinthia Dwi Jayanti; Ratnawulan -; Asrizal -; Silvi Yulia Sari
PILLAR OF PHYSICS EDUCATION Vol 16, No 1 (2023)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/14237171074

The development of science and technology in the era of the industrial revolution 4.0 is increasing rapidly and has its own challenges for the world of education. Existing and growing digital technology supports all the demands of this curriculum. The internet can be accessed by anyone, including students. However, some of the information they obtained cannot be confirmed. For this reason, literacy skills are needed for students to be able to sort information. Indonesia's science literacy condition is currently lagging far behind compared to other countries, as can be seen throughPISA. The purpose of this study was to determine the emergence of the scope of science literacy in physics instructional material for class X senior high school in Padang city. This type of research used descriptive research with a qualitative approach. The research method is the document analysis method. The research population is all instructional material used by class X high school students in the city of Padang. The research samples are three instructional material used by high school class X students in Padang City. The research results (1) science as a body of knowledge by 90.93%, 59, and 80%, (2) science as a way of investigating by 21.85%, 21.24% and 4.57%, (3) science as a way of thinking by 24.07%, 6.42% and 4.57%, and (4) the interaction of science, technology and society by 3.33%, 0.76% and 4.57%. This shows that it is necessary to develop these instructional material so that there is a science literacy component.

THE EFFECT OF PROBLEM-BASED LEARNING MODEL USING PHET SIMULATION ON PHYSICS STUDENT’S ACHIEVEMENT aisyah fadillah; Ratnawulan Ratnawulan; Silvi Yulia Sari; Renol Afrizon
PILLAR OF PHYSICS EDUCATION Vol 16, No 1 (2023)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/14328171074

The purpose of this study is to determine the effect of a problem-based learning model supported by PhET media on student physics learning results. This research conducted at Senior High School 6 PadangThe type of study conducted was a design of quasi-experimental. The study design used was a posttest-only control design. Samples were selected from Class X IPA Senior High School Number 6 Padang, the study population for the 2021/2022 school year, using a targeted technique of sampling. XI IPA 1 class as the experimental class and XI IPA 2 as the control class. The data collection instrument used is a test instrument. The analysis of data techniques used are descriptive statistical analysis the tes are, normality, homogeneity, and U test (Mann-Whitney). From the research data analysis, the experimental class's average value was 80.69, higher than the control class, 62.14. The results of hypothesis testing obtained zcount = 7.24 and ztabel = 1.96 by the Ho rejection criteria, namely, reject Ho if zcount <-ztabel or zcount>ztabel. The conclusion that the effect of learning problem-based model in static fluid learning using LKPD Based on PhET on physics learning results at Senior High School number 6 Padang.

The Characterization of the Hydrophobic Surface of Nanocomposites Aloe vera/PS for Antimicrobial Pathogens Lathifa Zonesya Putri; Ratnawulan Ratnawulan; Ramli Ramli; Hamdi Rifai; Faridah Lisa Supian; Irna Humairah
Science and Technology Indonesia Vol. 8 No. 2 (2023): April
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.2023.8.2.212-218

The spread of pathogenic microorganisms on a large scale creates a health disaster for the world. Modifying the surface of the fabric so that it is antimicrobial pathogens with hydrophobic properties is one solution to inhibit the spread of microorganisms. Surface modification was carried out using Aloe vera powder as filler and polystyrene matrix with Aloe vera:PS composition variations of 1:5, 2:5, and 3:5 using the dip coating method and drying temperatures of 10◦C, 50◦C, and 90◦C. The characterization results that have been carried out with the best composition variations are 3:5 and 50◦C with a layered morphology using Scanning Electron Microscopy (SEM), resulting in a surface particle size of 21.243 nm, large contact angle/WCA using a Canon D350 camera with a size of 150.23◦, Fourier Transmission Infrared Analysis (FTIR) with the dominant functional group in the vibration band 2629 cm−1 indicates the presence of a long hydroxyl chain, the vibration band 1500 cm−1 with C-H stretching of the aromatic ring is caused by the characteristics of the polystyrene polymer and the wave number is 1700 cm−1 with stretching C=O which shows the characteristics of the carbonyl group in the Aloe vera sample is a flavonoid compound. The resistance of Aloe vera/PS solution to Klebsiella pneumonia resulted in a 20.18 mm diameter barrier showing strong resistance against bacteria and X-Ray Diffraction analysis showed that the AV powder was amorphous. Thus, the AV/PS 3:5 composition with a calcination temperature of 50◦C represents the greatest variation in the synthesis and characterization of hydrophobic thin films for pathogenic antimicrobial organisms.

ANALYSIS OF THE SUITABILITY OF PHYSICS LABORATORY FACILITIES AND INFRASTRUCTURE Muhammad Ridwan Azizi; Ratnawulan Ratnawulan
Physics Learning and Education Vol. 1 No. 1 (2023): March Edition
Publisher : Department of Physics Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/ple.v1i1.11

This study aims to determine the level of suitability of physics laboratory facilities and infrastructure based on the Ministry of National Education Number 24 of 2007. The method in this research is descriptive quantitative using survey method. Data collection techniques using observation sheets have been adapted to Ministry of National Education Number 24 of 2007 and interviews. The subjects in this study were the facilities and infrastructure of the physics laboratory. The data analysis technique was carried out to describe the results of observations and interviews that had been carried out. Data analysis that will be carried out in the research is after the data is collected, the next step is to compare the existing physics laboratory facilities and infrastructure with Permendiknas Number 24 of 2007 whether they are suitability or not. The results of the research on the analysis of the suitability of the physics laboratory facilities and infrastructure at senio high school in west sumatera showed the level of conformity based on Ministry of National Education Number 24 of 2007 showed different results for each suggestion and infrastructure studied, namely in the learning facilities section of 100%, the basic measuring instrument of 84 .4%, practicum materials with a percentage of 92.4%, experimental tools by 69.2%, for educational media and other equipment and infrastructure with a percentage of 100%. Meanwhile, the results of the suitability of all existing facilities and infrastructure are 90% with the very appropriate category.

Pengaruh Penambahan Carboxymethyl Cellulose (CMC) terhadap Kualitas Plastik Biodegradable dari Tongkol Jagung M. Bayu Ihsan; Ratnawulan
Jurnal Penelitian Pendidikan IPA Vol 9 No 7 (2023): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i7.4010

This study aims to determine the effect of CMC addition on thickness, tensile strength, elongation and biodegradation of biodegradable plastic from corn cob starch. In this study, the addition of Carboxymethyl Cellulose which plays a role in increasing the tensile strength of biodegradable plastics. This research was conducted in 2 stages. The first stage is varying CMC as much as 20%, 30%, 40%, 50% and 60% (w/b starch) and the second stage is mixing corn cob starch as much as 2 grams with CMC 20% - 60% w/b starch. The test results showed that the addition of CMC concentration of 20% w/w with corn cob starch mixing material had an effect on increasing the tensile strength value and decreasing the elongation value of the plastic. The addition of CMC concentration as much as 20%-60% w/b starch with corn cob starch blending material has an effect on increasing the percent weight loss of biodegradable plastics.

The Effect of Compositional Optical Analysis of ZnO/TiO2 Composites In a Sunscreen Product Maritza Syalsabilla; Fuad Sofaturahman; Mira Syuriyani; Lia Rifka Septiana; Nadia Raisa Aryani; Riri Jonuarti; - Ratnawulan; Rahmat Hidayat
PILLAR OF PHYSICS Vol 16, No 2 (2023)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/14929171074

TiO2 and ZnO are active components in commercialized physical sunscreens that have a broad protective spectrum, which includes UVB and UVA. The combination of ZnO/TiO2 composites has more effective performance in blocking Ultra Violet rays in a wide wavelength range compared to ZnO or TiO2 alone. However, the high refractive index of TiO2 can cause a white cast. To solve the issue, a cream was created by incorporating antioxidants such as Virgin Coconut Oil (VCO). The purpose of this study is to determine the effect of the ZnO/TiO2 composite optical composition on visible and ultra violet light. Three composition comparisons were investigated in the study: ZnO/TiO2 10% added VCO, ZnO/TiO2 5% added VCO, and ZnO/TiO2 5% without VCO. UV-vis spectroscopy characterization showed that the ZnO/TiO2 composite absorbed more effectively in the ultra violet range than in visible light, and the greatest absorption and maximum reflectance are in the UVA1 range. The higher the concentration of ZnO/TiO2 in the cream composition, the higher the cream's absorption and reflection peaks. The reflectance in the visible light region is low, between 30% and 40%, implying that visible light passes through the sunscreen cream 70% to 80% of the time. As a result, the higher the ultra violet reflectance of the physical sunscreen cream, the lower the transparency. The higher the concentration of ZnO/TiO2, the greater the band gap value of the physical sunscreen, in the range of 3.1–3.5 eV

Making of Biodegradable Plastic Based on Corn Starch (Amylum Maydis) with Addition of Acid (CH3 COOh) and Gliserol Plasticizer Desti Yuspita Sari; - Ratnawulan; Riri Jonuarti; Rahmat Hidayat
PILLAR OF PHYSICS Vol 16, No 2 (2023)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/15040171074

Almost all countries face the problem of plastic waste due to the large production of conventional plastics and the long degradation process. Therefore, to protect nature from the accumulation of plastic waste, research on biodegradable plastics needs to be done. Biodegradable plastics are made from starch, cellulose, chitosan, and proteins extracted from renewable biomass. Starch for making biodegradable plastics can be obtained from plants, one of which is corn. This study aims to determine the effect of the composition of acetic acid, glycerol and corn starch on the quality of biodegradable plastics which include tensile strength, elongation and biodegradation. The independent variables were variations of acetic acid and glycerol. Control variables are plastic mold size, corn starch mass of 5 grams, other compounds outside the independent variables. The dependent variable is tensile strength, elongation and biodegradation. To test the tensile strength and elongation of biodegradable plastic, Ultimate Testing Machine Mini was used. The results showed that the addition of acetic acid and glycerol to the corn starch and glycerol blending material had an effect on increasing the tensile strength value and reducing the elongation and biodegradation values of biodegradable plastics. The highest tensile strength value is 50.04 Mpa, obtained from the addition of 1.44% acetic acid and 35.71% glycerol from a volume of distilled water of 70 ml. The highest length gain or elongation of 90% was obtained from the addition of 0.48% acetic acid and glycerol as much as 21.43% of the 70 ml volume of distilled water. Percent weight loss of the largest plastic obtained from the addition of acetic acid as much as 0.48% and glycerol as much as 21.43% of the volume of distilled water as much as 70 ml, which amounted to 93.33%.

Validitas E-modul Fisika Energi Alternatif dan Pemanasan Global Kelas X Berbasis Model Pembelajaran Berbasis Masalah Terintegrasi Pembelajaran Abad 21 Korry Nilyani; Ratnawulan
Jurnal Penelitian Pendidikan IPA Vol 9 No 11 (2023): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i11.5512

This research aims to reveal the level of validity of class prepared based on the syntax of the problem based learning model and integrated with the four 21st century skills, namely, collaboration skills, critical thinking skills, creative thinking skills and communication skills. This research is research and development using the Plomp model. The instrument used was a questionnaire and the data was analyzed descriptively based on the validation score sheet. Products are validated by experts. The observation results were analyzed using the Aiken V formula. The results of the analysis showed the average value of Aiken's V was 0.97. The validity results show that the physics e-module meets the valid criteria. These findings indicate that the physics e-module on alternative energy and global warming material, based on problem based learning integrated with 21st century learning, is suitable for use.

Co-Authors - Hamdi AA Sudharmawan, AA Abdul Aziz Adilla, Rika Afrilla, Sonya Ahmad Fauzi Ahmad Fauzi aisyah fadillah Akmam Akmam Al Naim, A. F. Almunazar, Fauziyah Amelia Roza Haqu Amirullah, Fajar Fikri Anisa Janna Anisa Surya Annisa Kurniawati Aprianti, Rika Aria Ulfa Aris Alfikri Arni Sopianti Asri Devialita Asrizal - Betty Mizarwan Bizar al furqan Dafri Zaldi Dani Gustaman Syarif Delianis Pringgenis Desnita Desti Yuspita Sari Deswita, Pipi Devana Dhiya Purnama Sari, Salsabila Dian Septiana Dila Juliawati Djusmaini Djamas Doni, Rahma Dwi Putri Ramadhani Elvira Diana. S Emiliannur Emiliannur Ernita Susanti Ernmaniati Ramli Fadhila Ulfa Jhora Fadli M Fanny Rahmatina Rahim Faridah Lisa Supian Fatni Mufit Fauzi Ahmad Muda Fauziyah, Faadhilah Febriona, Fhica Febriya, Dhea Fitri, Hidayatul Forni, Francesca Fran Surya Andi Fuad Sofaturahman Gusnedi Gusnedi Gusnedi Gusnedi Gusnedi Gusnedi Gusnedi, - Gusriandi, Dedi Gustaman Syarif Gusti, Dian Arima Gustika Yonanda Hamdi Rifai Hardina, Yuli Harman Amir Hayyu Yumna Hidayat, Zaitul Hidayati Hidayati Hidayati Hidayati Hidayatul Lisma, Rahmi Hosman, N. J. Hufri Hufri I Made Arnawa Idam Arif Ilahi, Fitratul Intan Purnama Yani Ipal Ipal Irna Humairah Ismira, Ismira Izzati Salsabilla Madina Jasmine, Alifa Jhora, Fadhila Jhora, Fadhila Ulfa Kharisma Marta Judenta Korry Nilyani Lailatul Rahmi Lathifa Zonesya Putri Letmi Dwiridal Letmi Dwiridal Lia Rifka Septiana M. Bayu Ihsan Maharani Erika Putri Maharani, M Maritza Syalsabilla Masril Masril Mayasari, Tantri Mira Syuriyani Mohd Azmi, M. S. Muhammad Ridwan Azizi Mutiara Kusuma Febriwanti nabila aulia rahma Nadia Raisa Aryani Nadiyyah, Khoirotun Najmiatul Fajri Naspin, Desi Ariyanti Nessa Aqila Novella Febriana Nur Azizah Nurhabibah Nasution Nurhayati Nurhayati PAT, Anggi Angelina PAT Angelina Putri Dwi Sundari Putri, Sri Fany Mulya Rahima Syabrina Sarmi Rahmad Efendi Rahmat Hidayat Rahmat Hidayat Rahmat Hidayat Raisa, Nadia Ramadhani, Dinda Ramli Ramli Renol Afrizon Renold Fernanda Retna Junia Rifka, Lia Riri Camara Putri Riri Jonuarti Riri Jonuarti Riri Yandari Rita Iranie Riyasni, Selma rizka fauziah Rizki Fernanda Rosa Ayuni Utami Rosi Selfia Putri Santika, Viera Alvio Saputri, Ririn Hustia Sarimai Sarimai Sarmi, Rahima Syabrina Septia, Zahwa Silvi Yulia Sari Sinthia Dwi Jayanti Sisi Gusti Putri Sofaturrohman, Fuad Suherman, Dea Stivani Sumanti, Syahputri Supian, F. L. Syafri Syafri Syafriani Syafriani Syafriani Syafriani, - Syahputra , Ilham Syakbaniah Syakbaniah Syalsabilla, Maritza Syuriyani, Mira Tho, S. W. Triana Dwi Restika Trisia Meidini, Ella Ulfa Jhora, Fadhila Ulfa Jhora, Fadhilla Ulfa Jhora, Fadila Urwatil Wuskha Usmeldi Usmeldi Vauzia, Vauzia Veni Wahyuni Vonny Tinedi Wardatul Ullya Widiasih, Widiasih Witriani Marvinatur Ihsan Wong, Y. Y. Yanna, Fitri Yedho Syahadha Yenni Darvina Yola sri Wahyuni Yuliani, Kurnia Dwi Yulianti, Lastri Yuliza Noerman, Kiki Yulkifli Yulkifli Yurnetti Yurnetti Zaitul Hidayat Zakirman Zaturrahmi Zaturrahmi Zoni, Muhammad Ari Zulhendra Zulhendra Zulhendri Kamus

Title

Found 102 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 102 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 102 Documents
Search