Article Per Year (5 Year)
p-Index From 2019 - 2024
0.778
P-Index
This Author published in this journals
All Journal JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Jurnal POLIMESIN PEDAMAS (Pengabdian Kepada Masyarakat)
Kartika Sari
Jenderal Soedirman University
Humanities Automotive Engineering Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Social Sciences

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
Properties of Pineapple Leaf Fibers with Paper Waste as An Absorbing-Composite to Reduce Noise Kartika Sari; Yazid Zainur Isnen; Agung Bambang Setio Utomo; Sunardi Sunardi
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 11, No 2 (2022): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v11i2.12356

Abstract

Natural product-based noise-absorbing composite can be an alternative to replace synthetic fiber because of its advantages of high strength, toughness, low price, and abundance to reduce noise. The materials used were pineapple leaf fibers with paper waste. This research aims to study the advantage of natural products to reduce noise by analyzing the coefficient of sound absorption and impact strength to evaluate the absorbing composite. The composites were tested with the Charpy method with ISO 11654 standard and ASTM E23 for sound absorption and impact strength. Sound absorption was carried out using an impedance tube at a frequency range of 250 – 3000 Hz. The volume fraction of pineapple leaf fibers, paper waste, and resin epoxy concentrations were 20% : 30% : 50%, 25% : 25% : 50%, and 30% : 20% : 50%. The thickness for the sound absorption coefficient was 2 cm and 3 cm, while the thickness of the impact strength was 0.5 cm. The highest sound absorption coefficient of pineapple leaf fibers composite for 30% : 20% : 50% volume fraction was 0.788 for sample 2 cm. The highest impact strength for 20% : 30% : 50% volume fraction of the thickness of 0.5 cm was 3.527 J/mm2. The results of the sound absorption coefficient will increase if used more pineapple leaf fibers but it will decrease the impact strength. Based on this research, the pineapple leaf fibers will improve the quality of the composite that can be used as a sound-absorbing material as well. These materials possess the promising potential to decrease waste and are used in industries for a low cost.
Natural Dyes as a Photosensitizer from Dragon Fruit (Hylocereus polyrhizus) for Dye-Sensitized Solar Cells Kartika Sari; Sunardi sunardi; Dita Asa Panunggul; Agung Bambang Setio Utomo; Parmin Lumban Toruan; Ampala Khoryanton
Jurnal POLIMESIN Vol 21, No 1 (2023): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i1.3082

Abstract

Natural Dye is one of the important materials of DSSC which absorbs photons from the sun’s rays and transmits the photoelectron. One of the natural dyes is Dragon fruit dye. The characterization of the optical and electrical properties of a sensitizer DSSC used a UV-Vis spectrometer, FTIR spectrometer, and solar power meter. The absorption spectra of the UV-Vis spectrometer are being measured by a wavelength range of  400 – 700 nm and show a maximum peak of 535 nm. The result of the FTIR spectrometer shows the functional group of  H-bond stretching, C=O, and C-O-H stretching vibrations.  It is a part of anthocyanin and chlorophyll.  Zinc Oxide (ZnO) paste coated on the Indium Tin Oxide (ITO) as the thin film is dipped in the Dragon fruit dye extracted for 30 hours. Thin film is prepared as the working electrode and counter electrode. The characteristic of current and voltage (I-V) as electrical properties are measured by the solar power meter.  The result of the current and voltage DSSC from Dragon fruit dye extracted coated ZnO obtained, indicated that the energy bandgap could be optimized to make a wide bandgap. ZnO thin film needs the Dragon fruit dye to decrease the surface and move electrons in the bandgap. The Dragon fruit dye extracted coated ZnO thin film could be used as a sensitizer since it will increase the correlation between the ZnO thin film and dye. And the last, it will improve the quality of solar cells as well.
Properties of Pineapple Leaf Fibers with Paper Waste as An Absorbing-Composite to Reduce Noise Kartika Sari; Yazid Zainur Isnen; Agung Bambang Setio Utomo; Sunardi Sunardi
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 11, No 2 (2022): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v11i2.12356

Abstract

Natural product-based noise-absorbing composite can be an alternative to replace synthetic fiber because of its advantages of high strength, toughness, low price, and abundance to reduce noise. The materials used were pineapple leaf fibers with paper waste. This research aims to study the advantage of natural products to reduce noise by analyzing the coefficient of sound absorption and impact strength to evaluate the absorbing composite. The composites were tested with the Charpy method with ISO 11654 standard and ASTM E23 for sound absorption and impact strength. Sound absorption was carried out using an impedance tube at a frequency range of 250 – 3000 Hz. The volume fraction of pineapple leaf fibers, paper waste, and resin epoxy concentrations were 20% : 30% : 50%, 25% : 25% : 50%, and 30% : 20% : 50%. The thickness for the sound absorption coefficient was 2 cm and 3 cm, while the thickness of the impact strength was 0.5 cm. The highest sound absorption coefficient of pineapple leaf fibers composite for 30% : 20% : 50% volume fraction was 0.788 for sample 2 cm. The highest impact strength for 20% : 30% : 50% volume fraction of the thickness of 0.5 cm was 3.527 J/mm2. The results of the sound absorption coefficient will increase if used more pineapple leaf fibers but it will decrease the impact strength. Based on this research, the pineapple leaf fibers will improve the quality of the composite that can be used as a sound-absorbing material as well. These materials possess the promising potential to decrease waste and are used in industries for a low cost.
PENGUATAN MATERI FISIKA FLUIDA STATIS “HUKUM ARCHIMEDES” MENGGUNAKAN MODEL PEMBELAJARAN CTL (COLLABORATIVE TEAMWORK LEARNING) PADA SISWA KELAS X JURUSAN TEKNIK OTOMOTIF SMK N 1 PURWOREJO Umi Pratiwi; Gigih Anggita; Kartika Sari; Aldilla Luthfia
PEDAMAS (PENGABDIAN KEPADA MASYARAKAT) Vol. 1 No. 1 (2023): MEI 2023
Publisher : MEDIA INOVASI PENDIDIKAN DAN PUBLIKASI

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

Abstract

Pembelajaran fisika sebagai pembelajaran yang masih menjadi kendala bagi sebagain siswa. Perlu adanya inovasi pembelajaran untuk memperkuat pemahaman konsep-konsep fisika agar pemahaman siswa lebih komperehensif dan lebih terwujud pada tujuan pembelajaran. Kegiatan ini bertujuan untuk memperkuat materi fisika dengan penerapan model pembelajaran Colaborative Teamwork Learning (CTL) dan sekaligus untuk mengetahui peningkatan keterampilan kolaborasi peserta didik SMK Negeri 1 Purworejo pada pokok pembahasan fluida statis. Penerapan model CTL diperkuat dengan pembelajaran praktikum pada materi hukum archimedes. Obyek kegiatan ini adalah peserta didik kelas X Teknik Otomotif-A Purworejo yang berjumlah 36 peserta didik. Sedangkan teknik pengumpulan data yaitu dengan tes dan observasi. Metode dengan indikator pemecahan masalah dengan pre-test dan post-test. Metode observasi mewakili indikator indikator kontribusi, manajemen waktu,bekerja dengan orang lain dan teknik penyelidikan. Data yang telah dikumpulkan dianalisis menggunakan analisis kuantitatif. Hasil dari penelitian ini yaitu pada pre-test nilai minimun yang didapatkan peserta didik sebesar 65 dan maksimum sebesar 75 dengan rata-rata 68,75. Sedangkan pada hasil post-test diperoleh nilai minimum sebesar 80 dan maksimum sebesar 95 serta nilai rata-rata yang didapatkan peserta didik mencapai 86,53. Hasil pengukuran nilai tersebut terjadi peningkatan sesudah diberikan penerapan model pembelajaran CTL. Hasil penilaian observasi sebelum penerapan meodel pembelajaran CTL nilai minimun yang didapatkan peserta didik sebesar 56 dan maksimum sebesar 75 dengan rata-rata 65,14. Sedangkan hasil penialian sesudah penerapan model pembelajaran CTL mendapatkan nilai minimum sebesar 75 dan maksimum sebesar 94 serta nilai rata-rata yang didapatkan peserta didik mencapai 85,44. Hasil tersebut menunjukkan penerapan model CTL secara signifikan meningkatlan kemampuan kolaborasi dan kemampuan pemecahan masalah berkaitan dengan materi fluida statis. Sehingga terdapat peningkatan keterampilan kolaborasi peserta didik pada indikator kontribusi, manajemen waktu,bekerja dengan orang lain dan teknik penyelidikan. Sehingga dapat disimpulkan bahwa model collaborative teamwork learning mampu meningkatkan keterampilan kolaborasi peserta didik secara signifikan. Diharapkan dikegiatan lebih lanjut dapat dimodifikasi dengan model pembelajaran lainnya agar kemampuan problem solving siswa lebih meningkat lebih baik lagi.
Co-Authors Agung Bambang Setio Utomo Agung Bambang Setio Utomo Aldilla Luthfia Ampala Khoryanton Dita Asa Panunggul Gigih Anggita Parmin Lumban Toruan Sunardi sunardi Sunardi Sunardi Umi Pratiwi Yazid Zainur Isnen