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All Journal VALENSI EDUSAINS Komunikasi Fisika Indonesia JFA (Jurnal Fisika dan Aplikasinya) Spektra: Jurnal Fisika dan Aplikasinya JPF : JURNAL PENDIDIKAN FISIKA JURNAL PENDIDIKAN MIPA PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Makara Journal of Science Madani: Multidisciplinary Scientific Journal
Nurlaela, Ai
Tadris Fisika, Fakultas Ilmu Tarbiyah Dan Keguruan, Universitas Islam Negeri Syarif Hidayatullah Jakarta
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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Dye Sensitized Solar Cell (DSSC) Efficiency Derived from Natural Source Muhammad Fajri Maulana; Elvan Yuniarti; Ai Nurlaela; Sitti Ahmiatri Saptari
Jurnal Fisika dan Aplikasinya Vol 17, No 3 (2021)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v17i3.9616

Abstract

Dye Sensitized Solar Cell (DSSC) with natural dye from Leunca fruit (Solanum Nigrym L) and Jamblang fruit (Syzygium Cumini L) extract as sensitizer has been created. This DSSC is composed of ZnO doping TiO2 using milling tool for 30 minutes which would be used as photoelectrodes. This study used two natural dyes which are Leunca and Jamblang fruit. The characterizations were performed to examine crystal structure of ZnO-TiO2 with XRD, to measure ZnO-TiO2 particle size with SEM, to examine optical properties from the dye using UV-Vis spectrophotometer, and to run an electrical test to find the efficiency from DSSC. The results indicate that the use of Jamblang fruit as sensitizer is better than Leunca fruit. This is because Jamblang fruit extract has light absorption area on the range of 250 - 800 nm which is higher absorbance than that of Leunca fruit. In addition, the milling time applied was found to be not long enough to produce semiconductor with smaller crystal size. The electrical test result shows Jamblang fruit based DSSC performance is better than Leunca fruit. The maximum power output values are 4.01 x 10−8 Watt with the efficiency of 22.57 x 10−4 % and 2.16 x 10−7 Watt with efficiency of 6.02 x 10−4 % when radiated with Halogen lamp and sunlight, respectively. Aside from the fact that the preparation technique is relatively easy, natural dye material can be found abundantly in nature and its price is also cheap, hence this study is very promising. However, several changes are needed to gain better results. The brief of this research is to develop alternative energy from solar energy, so that its use can be maximized as environmentally-friendly energy source.
PROFILE OF SCHOOL READINESS IN APPLYING STEM (SCIENCE, TECHNOLOGY, ENGINEERING, MATHEMATIC) EDUCATION Yanti Herlanti; Usawatun Amalia; Ai Nurlaela
EDUSAINS Vol 14, No 1 (2022): EDUSAINS
Publisher : Faculty of Education and Teacher Training, UIN (State Islamic University) Syarif Hidayatul

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/es.v14i1.25541

Abstract

STEM knowledge and skills are needed by students in order to survive in the era of the industrial revolution 4.0. This study aims to determine the level of readiness of public high schools in Bogor City in implementing STEM education. Descriptive research with survey method with stratified sample selection. The number of samples is three principals, nine science teachers, and 75 students. The research instrument was in the form of a questionnaire assessing readiness from aspects of the curriculum, supporting extracurriculars, admission selection, and STEM supporting facilities as well as students' interest in STEM. Data analysis uses a modified readiness score according to Aydin & Tascy (2005). The findings of the study show that public high schools in the city of Bogor are ready to implement STEM education. Readiness to apply STEM education is shown by the Principal. Students also showed readiness to apply STEM education, but needed a little improvement. As for the teacher, it shows unpreparedness and needs improvement.PROFIL  KESIAPAN SEKOLAH SMA NEGERI KOTA BOGOR DALAM MENERAPKAN PENDIDIKAN STEM (SCIENCE, TECHNOLOGY, ENGINEERING, MATHEMATIC)AbstrakPengetahuan dan keterampilan STEM diperlukan peserta didik agar dapat bertahan pada era revolusi industry 4.0. Penelitian ini bertujuan untuk mengetahui tingkat kesiapan sekolah SMA Negeri di Kota Bogor dalam menerapkan pendidikan STEM. Penelitian deskriptif dengan metode survei dengan pemilihan sampel secara stratafikasi.  Jumlah sampel adalah tiga orang kepala sekolah, sembilan orang guru Sains, dan 75 orang peserta didik. Instrumen penelitian berupa angket menilai kesiapan dari aspek kurikulum, ekstrakuler penunjang, seleksi masuk, dan fasilitas penunjang STEM serta minat peserta didik terhadap STEM.  Analisis data menggunakan skor kesiapan menurut Aydin & Tascy (2005) yang telah dimodifikasi. Temuan penelitian menunjukan SMA Negeri di Kota Bogor siap menerapkan pendidikan STEM. Kesiapan penerapan pendidikan STEM ditunjukkan oleh Kepala Sekolah.  Peserta didik pun menunjukkan kesiapan penerapan pendidikan STEM, namun perlu sedikit peningkatan.  Adapun dari guru, menunjukkan ketidaksiapan dan perlu peningkatan.How To Cite: Yanti, H., Amalia, U., Nurlela, A. (2022). Profil  Kesiapan Sekolah Sma Negeri Kota Bogor Dalam Menerapkan Pendidikan Stem (Science, Technology, Engineering, Mathematic). EDUSAINS, 14 (1) : 14-23.
PENGARUH METODE DRILL BERBANTUAN SOAL ANIMASI TERHADAP KEMAMPUAN BERPIKIR REFLEKTIF SISWA PADA KONSEP DINAMIKA PARTIKEL Shinta Fitriyani; Erina Hertanti; Ai Nurlaela
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 6 (2017): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2017
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (289.725 KB) | DOI: 10.21009/03.SNF2017.01.EER.01

Abstract

This research aims to prove the effect of drill method by questions format with animation to reflective thinking skills students on the dynamic particle concept. The research was conducted on February 2016 in SMA Negeri 1 Karawang. This research has two samples, there were X MIPA 1 as control class and X MIPA 6 as experiment class. The research method was a quasi experiment with nonequivalent control group design and the sampling technique was purposive sampling. The instrument divided into two types, test with essay questions and non-test with the questionnaire. A hypothesis based on testing that used t-test to post test result the value of tcount was 2.00 and table was 1,99, that showed the value of tcount>ttable, so H0 was rejected. It means, the drill method by questions format in the form of animation was proved the influence of reflective thinking skills students. Kata-kata Kunci: Metode Drill, Soal dalam format Animasi, Kemampuan Berpikir Reflektif
STUDI KOMPUTASI KARAKTERISTIK OPTIK CYANIDIN SEBAGAI SENSITISER DENGAN PELARUT ETHANOL, AIR, DAN ACETONITRILE Elvan Yuniarti; Ai Nurlaela
Komunikasi Fisika Indonesia Vol 20, No 1 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.1.39-48

Abstract

Cyanidin molecule is a type of anthocyanin that has the potential as a sensitizer for dye sensitiser solar cell (DSSC). This molecule is contained in blueberries, grapes, raspberries, and others. This study aims to determine cyanidin molecules' molecular orbitals and HOMO-LUMO energy levels with ethanol, water, and acetonitrile. In addition, this study aims to determine the optical properties of cyanidin dye with ethanol, water, and acetonitrile as solvents. The method used in this research is density functional theory (DFT) and TD-DFT/UB3LYP using Orca.2.02 and quantum espresso applications. The results obtained in the molecular orbitals of cyanidin with various solvents (ethanol, water, acetonitrile) obtained energy gap: 2.8 eV, 2.4 eV, and 3.2 eV. The results of UV-Vis absorption spectra (ethanol, water, acetonitrile) have the same wavelength (158.80 nm – 271.10 nm, 362.10 nm, 453.60 nm) but the intensity is different. Likewise the results of theinfra red spectra (1138 cm-1 – 1486 cm-1), and the Raman spectra (1141 cm-1 – 1606 cm-1) for different solvents have almost the same wave number.
Pengetahuan Masyarakat tentang Dampak Lingkungan dan Keamanan Reaktor Nuklir: Survei di Wilayah Tangerang Selatan Amelia Putri Wardhani; Halimatul Zahra Kurtubi; Ahmad Fikri Alfarizki; Windi Anggraini; Nabila Aprilia; Ai Nurlaela
Madani: Jurnal Ilmiah Multidisiplin Vol 1, No 11 (2023): Desember
Publisher : Penerbit Yayasan Daarul Huda Kruengmane

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.10406143

Abstract

Dalam menghadapi perubahan energi global, reaktor nuklir menjadi salah satu opsi yang mungkin untuk memenuhi kebutuhan energi yang meningkat. Namun, keberhasilan implementasi reaktor nuklir sangat bergantung pada dukungan dan pemahaman masyarakat terkait dampaknya. Penelitian ini bertujuan untuk menginvestigasi tingkat pengetahuan masyarakat di Wilayah Tangerang Selatan mengenai dampak lingkungan dan keamanan reaktor nuklir. Hasil kuisioner yang telah terisi mendapatkan hasil bahwa sebagian besar responden masih mempunyai tingkat pengetahuan tertentu yang rendah mengenai reaktor nuklir dan kurangnya informasi terkait dampak lingkungan serta keamanannya. Banyak responden mengindikasikan ketidakpastian dan kurangnya pemahaman terhadap teknologi nuklir, yang tercermin dalam rendahnya tingkat kesadaran terkait risiko dan manfaat yang terkait dengan implementasi reaktor nuklir. Namun, temuan yang menarik adalah adanya minat yang signifikan dari sebagian masyarakat untuk mendapatkan informasi lebih lanjut melalui kegiatan sosialisasi. Sejumlah responden mengekspresikan ketertarikan mereka untuk memahami lebih mendalam tentang reaktor nuklir dan dampaknya.
Peran Penting Teknologi dalam Pendidikan Sains: Pengembangan dan Validasi Media Pembelajaran Berbasis Android dengan App Inventor untuk Pemahaman Materi Gelombang Cahaya Ghani Fauzan Fasna; Dzikri Rahmat Romadhon; Ai Nurlaela
JURNAL PENDIDIKAN MIPA Vol 14 No 1 (2024): JURNAL PENDIDIKAN MIPA
Publisher : Pusat Publikasi Ilmiah, STKIP Taman Siswa Bima

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37630/jpm.v14i1.1485

Abstract

Teknologi memiliki peran krusial dalam kegiatan belajar mengajar, terkhusus dalam konteks pembelajaran Ilmu Pengetahuan Alam (IPA) yang memerlukan pemahaman konsep kompleks dan abstrak. Artikel ini membahas pentingnya pemakaian media pembelajaran interaktif untuk memfasilitasi pemahaman konsep ilmiah, fokus pada pembelajaran fisika. Penelitian ini mengaplikasikan metode penelitian pengembangan dengan merujuk pada kerangka Jan Van Den Akker. Guru seringkali belum optimal dalam menggunakan media pembelajaran, menyebabkan kurangnya ketertarikan dan pemahaman konsep fisika oleh siswa. Produk yang dihasilkan, yaitu media pembelajaran berbasis Android dengan App Inventor, mengalami validasi oleh ahli media dan ahli materi dengan tingkat efektivitas tinggi dan Total Content Validity (TCR) dalam kategori "sangat baik". Pengujian selanjutnya, baik uji satu-satu maupun uji kelompok kecil, menunjukkan efektivitas yang tinggi dengan persentase TCR dalam kategori "sangat baik". Hasil uji lapangan juga menunjukkan efektivitas tinggi dengan TCR kategori "baik". Evaluasi sumatif menunjukkan peningkatan pemahaman konsep fisika dengan nilai N-Gain dalam kategori "sedang". Media pembelajaran ini dianggap valid, praktis, dan efektif, dapat diakses melalui smartphone, membantu guru dalam mengajar, dan meningkatkan efisiensi dan efektivitas proses pembelajaran. Riset ini bertujuan untuk mengembangkan media pembelajaran berbasis Android, khususnya materi gelombang cahaya, dengan implikasi positif terhadap keterlibatan siswa, kompetensi teknologi, dan perubahan paradigma dalam pendidikan sains. Dukungan terhadap riset ini diharapkan dapat memberikan kontribusi pada inovasi pendidikan global, mempersiapkan generasi masa depan menghadapi tantangan teknologi, dan meningkatkan aksesibilitas pendidikan di era digital.
SYNTHESIZE OF TiO2 NANOPARTICLES BY PLANETARY BALL MILL FOR DYE-SENSITIZED SOLAR CELLS (DSSC) PHOTOELECTRODE APPLICATION Nurlaela, Ai; Yuniarti, Elvan; Saptari, Siti Ahmiatri
Spektra: Jurnal Fisika dan Aplikasinya Vol 8 No 2 (2023): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 8 Issue 2, August 2023
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.082.02

Abstract

In this study, the production of TiO2 nanoparticles from microcrystalline powder was accomplished using the high-energy ball milling (HEBM) technique. Three samples were milled for 0.5, 1, and 1.5 hours. The unmilled powder was also characterized as a comparison. The X-ray diffraction (XRD) technique was utilized to investigate the changes in the microstructure of the milled powders over time. The XRD curve of milled samples showed the broadening of the diffraction peaks, which indicates a decrease in particle size after the milling process. Using the Debye–Scherrer relation, obtain the particle size that decreased from 138.43 nm before milled to 76.65 nm after 0.5 hours milled, 90.63 nm after 1 hour milled, and 83.05 nm after 1.5 hours milled. XRD analysis also showed that TiO2 was in an anatase phase before and after milling. Furthermore, two samples of TiO2, unmilled and after 0.5 hours milled, were used as a working photoelectrode of DSSC with dye from mustard leaves. DSSC efficiency was measured with a 1000-watt halogen lamp. The efficiency of DSSC with photoelectrodes using TiO2 after 0.5 hours milled, which is 0.1715, was higher than using TiO2 before milled, which is 0,0987. The Large surface area in TiO2 enhances the efficiency of DSSC, indicating that the HEBM technique is quite suitable for producing these nanoparticles for this aim.
Synthesis and Characterization of Optical Properties of Carbon Quantum Dots (CQD) Based on Mustard Green (Brassica juncea L) Leaf with Urea Addition Yuniarti, Elvan; Nurlaela, Ai
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 2, November 2023
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v9i2.34164

Abstract

Carbon quantum dots (CQDs) are a class of fluorescent carbon nanomaterials. Carbon quantum dots (CQDs) were synthesized in this work from Mustard Leaves (Brassica juncea L) with the Addition of Urea via a microwave-assisted reflux method. This research aims to characterize CQDs' optical properties, energy gap, and emission under UV light computationally and experimentally. The studied optical properties obtained the maximum absorption peak observed from the UV-Vis spectrum of CQDs without urea shown at 233 nm. The UV-Vis spectrum of CQDs with the addition of urea (1 g, 1.5 g, and 2 g urea) has maximum absorption peaks at 424 nm, 422 nm, and 418 nm. The addition of urea causes a shift in the peak of the UV-Vis absorption spectrum towards red wavelengths (redshift). CQDs display bright green emissions when exposed to UV irradiation. In this work, the structures of CQDs of various forms (CQD-24, CQD-54, CQD-24-NH2, CQD-54-NH2) are theoretically studied in detail, and the results present both models (CQD-24, CQD-54) shows that the calculation results are in accordance with the experimental results, namely having a maximum UV-Vis absorption at 233 nm and in the range 200-400 nm. The results of calculations based on experiments show the same trend, namely that with the addition of urea, there is a shift in the absorption peak (redshift). The gap energy obtained also decreased with the addition of urea. CQDs solution emits yellow-green light.
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

Abstract

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.
Optics Learning Transformation through Project-Based Learning: Enhancing Scientific Abilities and Affective Learning Outcomes in Students with the Pinhole Camera Project Fadilah, Nur; Nurlaela, Ai; Romadhon, Dzikri Rahmat
Jurnal Pendidikan Fisika Vol 12, No 3 (2024): PENDIDIKAN FISIKA
Publisher : Universitas Muhammadiyah Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26618/jpf.v12i3.15358

Abstract

In physics education, the topic of optics requires a thorough and detailed understanding due to its challenging and intangible nature. To help students learn physics through practice, it is necessary to enhance their scientific abilities. Additionally, learning outcomes serve as a benchmark for success in education. In this context, project-based learning is chosen as the instructional model for presenting optics material in the classroom, since several studies have found this model to be effective in teaching. This research aims to measure the improvement of scientific abilities and affective learning outcomes of students in the field of physics, specifically the topic of optics. The quasi-experimental design method was employed in this study. The research sample comprised 11th-grade science students divided into two groups: the control group using which employed an inquiry-based learning model and the experimental group which utilized a combination of inquiry-based learning and project-based learning. The final project for the applied teaching model involved a pinhole camera. Data was gathered using observation sheets and questionnaires and subsequently analyzed using non-parametric tests (Mann-Whitney U and Wilcoxon). The data analysis results revealed a significant value (0.001), demonstrating that the project-based learning model effectively enhanced students’ scientific abilities and affective learning outcomes, highlighting marked improvements in the experimental class compared to the control class. Additionally, the project-based learning model proved effective in engaging students actively, creating a more effective and interactive learning experience. Students also expressed greater interest in physics, as lessons incorporated practical activities rather than solely focusing on theoretical concepts.
Co-Authors Ahmad Fikri Alfarizki Amelia Putri Wardhani Azhar, Anugrah Dedi Dedi Dwi Nanto, Dwi Elvan Yuniarti Elvan Yuniarti Ghani Fauzan Fasna Halimatul Zahra Kurtubi Hertanti, Erina Muhammad Fajri Maulana Nabila Aprilia NUR FADILAH Rahmat Romadhon, Dzikri Saptari, Siti Ahmiatri Saptari, Sitti Ahmiatri Shinta Fitriyani Tony Kristiantoro, Tony Usawatun Amalia Windi Anggraini Yanti Herlanti Yuniarti, Elvan