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All Journal Komunikasi Fisika Indonesia Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam SEMIRATA 2015 Journal of Aceh Physics Society Spektra: Jurnal Fisika dan Aplikasinya Jurnal Fisika Indonesia Jurnal Pengabdian Kesehatan Journal Of Human And Education (JAHE) PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Jurnal Bakti UPPR

Rahmi Dewi

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Author-ID : 252841

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Veterinary Other

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Karakterisasi Mikrostruktur Material Feroelektrik Ba0.8Sr0.2TiO3 (BST) dengan Variasi Suhu Annealing (Halaman 70 s.d. 72) Rahmi Dewi; Krisman -; Khaironiati -; Fauziana -
Jurnal Fisika Indonesia Vol 18, No 53 (2014)
Publisher : Department of Physics Universitas Gadjah Mada

Sampel Barium Strontium Titanate, Ba0.8Sr0.2TiO3 (BST) telah disediakan dengan menggunakan reaksi kimia padatan. Mikrostruktur sampel telah dikarakterisasi dengan menggunakan teknik difraksi sinar-X (XRD) dan Scanning Electron Microscopy (SEM). Sampel disediakan dengan variasi suhu yang berbeda yaitu pada suhu 600oC, 700 oC dan 800oC selama 60 menit di udara. Karakterisasi XRD menunjukkan dengan meningkatnya suhu annealing maka kristaline sampel semakin meningkat dengan struktur tetragonal. Karakterisasi SEM menunjukkan sampel adalah homogen dengan ukuran butiran seragam. Ukuran butiran sampel akan bertambah dengan bertambahnya suhu annealing. Seluruh sampel mempunyai ukuran butiran dalam nanometer.

Karakterisasi Mikrostruktur Material Feroelektrik Ba0.3Sr0,7TiO3 (BST) dengan variasi suhu annealing Rahmi Dewi; Krisman Krisman
Jurnal Fisika Indonesia Vol 21, No 1 (2017)
Publisher : Department of Physics Universitas Gadjah Mada

Telah dilakukan pembuatan sampel dari bahan Barium Strontium Titanat (BST) dengan komposisi Ba0,3Sr0,7Tio3 dengan menggunakan metode sol gel dan di annealing pada suhu 600oC,650oC dan 700oC. Ukuran butira dan ketebalan sampel dikarakterisasi menggunakan Field Emission Scanning Microscopy (FESEM). Ukuran butiran meningkat dengan meningkatnya suhu annealing. Nilai rata-rata ukuran butiran dari temperatur 600oC, 650oC dan 700oC adalah : 21,20 nm; 22,30 nm dan 26.8 nm. Nilai ketebalan sampel masing-masing adalah 31,28 nm;37,5nm dan 39,08nm.

PENENTUAN CELAH PITA ENERGI FILM TIPIS BARIUM STRONSIUM TITANAT (Ba1-xSrxTiO3) UNTUK x= 0,4 ; 0,5 DAN 0,6 Rahmi Dewi; Krisman Krisman; Taufiq Hidayat
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Barium Strontium Titanate (BST) thin film on the substrate glass was successfully fabricated by using sol-gel method. The purpose of this research is to obtain optical energy band gap value by adopting Tauc plot method with various composition and temperature. Obtaining of such information could be through identifying the degree of absorbance, degree of transmittance, the extent of refractive index, the usage of thin film and its quantified coefficients. Subsequently, the optical properties of thin film are characterized by using Ultraviolet-Visible Spectrophotometer with a thin film of Ba1-xSrxTiO3 subjected to temperatures of 650ÂºC. Upon subjected to temperature stated above, the wide energy band gap optical thin film Ba0,6Sr0,4TiO3 is in the range of 2.0 eV for Ba0,5Sr0,5TiO3 is in the range of 1.55 eV and for Ba0,4Sr0,6TiO3 is in the range of 2.0 eV. Keywords: Thin Film BST, Composition, Temperature, Energy Band Gap.

CHARACTERIZATION OF ENERGY BAND GAP THIN FILM BaTiO3 – BaZr0.5Ti0.5O3 USING DIFUSION REFLECTANCE SPECTROSCOPY (DRS) METHOD Dewi, Rahmi; Manalu, Wesly Arianto; Asrinaldo, Brian Noval; Rini, Ari Sulistyo; Yanuar, Yanuar
Spektra: Jurnal Fisika dan Aplikasinya Vol. 8 No. 1 (2023): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 8 Issue 1, April 2023
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.081.02

Ferroelectric material is a dielectric material that has a high dielectric constant value so that it can be made in the form of thin films. Its application is based on electro-optical properties, one of which is the infrared thermal switch. This paper aims to determine the bandgap energy (Eg) of a 0.3BaTiO3 – 0.7BaZr0.5Ti0.5O3 thin film. The 0.3BaTiO3 – 0.7BaZr0.5Ti0.5O3 thin film is a semiconductor material with the valence band and conduction band separated by an energy bandgap (Eg). Thin films of 0.3BaTiO3 – 0.7BaZr0.5Ti0.5O3 were grown on FTO substrates using the sol-gel method. The films of 0.3BaTiO3 – 0.7BaZr0.5Ti0.5O3 were annealed at different temperatures of 700°C, 750°C and 800°C within 1 hour. Characterization was carried out using Ultra Violet Visible (UV-Vis) spectroscopy to determine Eg using the Diffusion Reflectance Spectroscopy (DRS) method. The DRS method was found to be better for solid materials considering the scattering component. The UV-Vis characterization results show that an increase in annealing temperature causes a decrease in Eg. For example the values at 700°C, 750°C and 800°C are 3.5 ± 0.01 eV; 3.3±0.01 eV and 3.2±0.01 eV. The decrease in Eg is related to the diffusion of Barium Titanate (BaTiO3) ions into the Barium Zirconium Titanate (BZT) lattice forming a new sub-gap which in turn gives BT-BZT the ability to absorb lower light. Lower light absorption means more capable optics for multilayer systems.

Harnessing multi-doping porous carbon from Musa paradisiaca L. peel waste for solid-state supercapacitors Purba, Cenora Evelynza; Nursyafni, Nursyafni; Apriwandi, Apriwandi; Kresna, Pharada; Julnaidi, Julnaidi; Nasir, Muhammad; Farma, Rakhmawati; Dewi, Rahmi; Martin, Awaludin; Hardanto, Lilik Tri; Taslim, Rika; Taer, Erman
Indonesian Physics Communication Vol 21, No 3 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.3.187-196

The demand for low-cost carbons with multi-doping in supercapacitors has led to a significant focus on utilizing biomass waste to produce activated carbons. The research successfully utilized Musa paradisiaca L. (MPL) peel as a porous carbon for solid-state supercapacitor. The process involved collecting banana peel waste, drying the peels using sunlight, pre-carbonization using a furnace, pH neutralization, drying, crushing carbon particles, and ensuring uniform particle size. Different concentrations of the catalytic ZnCl2 solution (300, 500, and 700 mmol/g) were selected to optimize physical and electrochemical properties. The resulting chemically activated MPL carbon powder was evaluated using SEM-EDS, XRD, and BET. MPL activated carbon with a 500 mmol/g solution of ZnCl2 was found to have optimal physical properties with a carbon percentage of 81.65%, oxygen 17.39%, phosphorus 0.42%, and boron 0.52%. Electrochemical properties were evaluated using dual-electrode system was exhibited the highest specific capacitance of 67 F/g. These findings demonstrate the potential of MPL peel waste as a high quality electrode for supercapaicor next-generation.

Pengaruh Mengkonsumsi Pisang Ambon Bagi Penderita Hypertensi di Posyandu Lansia Desa Taman Sari UPTD Puskesmas Rawat Inap Ketapang Kabupaten Lampung Selatan Anisah, Aan; Zannah, Miftahul; Oktapiana, Putri Dian; Dewi, Rahmi; Besmaya, Beniqna Maharani
Jurnal Pengabdian Kesehatan Vol 7, No 3 (2024): Jurnal Pengabdian Kesehatan
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) STIKES Cendekia Utama Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31596/jpk.v7i3.491

Untuk menurunkan tekanan darah dapat dilakukan dengan pengobatan farmakologi dan non farmakologi salah satu pengobatan non farmakologi yang dapat dilakukan yaitu dengan pemberian buah pisang ambon Berdasarkan penelitian yang dilakukan dengan mengonsumsi 2 pisang ambon dalam sehari dengan dosisi ±280 gram perhari untuk mencukupi asupan kalium perhari yang dapat menurunkan tekanan darah sistolik maupun diastolik sehingga dapat mencegah terjadinya hipertensi. Selain itu, buah pisang ambon sangat baik dikonsumsi sebagai alternatif pengganti obat antihipertensi karena cara kerjanya mirip dengan cara kerja obat antihipertensi dan bisa dimanfaatkan untuk terapi nonfarmakologis. Tujuan: kegiatan pengabdian pada masyarakat ini adalah untuk mensintesis gagasan kreatif melalui sebuah program edukasi dengan menitikberatkan pada terapi nonfarmakologi pada lansia penderita hipertensi dengan mengkonsumsi pisang ambon. Pelakasanaan dalam kegiatan pengabdian masyarakat ini diikuti lansia penderita hipertensi di Desa Taman Sari yang berjumlah 20 lansia. Metode yang digunakan dalam kegiatan ini adalah ceramah, dan diskusi serta tanya jawab, dimana sebelum dan sesudah kegiatan lansia diberikan pretest dan posttest.Hasil: Kegiatan ini meningkatkan pemahaman lansia tentang hipertensi dan pemanfaatan pisang ambon untuk menurunkan tekanan darah

Synthesis and characterization of optical properties of barium titanate (BaTiO3) with the addition of moringa, banana, matoa, and ketapang leaves extracts Dewi, Rahmi; Apriwandi, Apriwandi; Hamzah, Yanuar; Sari, Eza Tirta; Butarbutar, Kheny Kernila; Putri, Nadja Melika; Nathania, Nazhiwa; Aritonang, Surya Ardika; Hartini, Titin; Hayati, Fitri; Maslyah, Maharani Nur; Sawitri, Seli Novalin; Komariah, Siti; Nursyahara, Septia; Nuraini, Nasywa; Aisy, Rihla Datul; Safira, Putri; Rusmanianty, Rusmanianty; Pratiwi, Dinda; Adela, Adela; Pasaribu, Veny Sriulina; Azhara, Vina Naomi; Febrita, Ayang
Indonesian Physics Communication Vol 22, No 2 (2025)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.22.2.169-174

Environmentally friendly synthesis of barium titanate (BaTiO3) nanoparticles was conducted using natural leaf extracts of Moringa oleifera, Musa spp., Pometia pinnata, and Terminalia catappa as green dopants via the sol-gel method. This study aims to evaluate the influence of different leaf extracts on the optical properties of BaTiO3 characterized by UV-Vis spectroscopy. Each sample exhibited distinct absorption spectra, reflecting variations in phytochemical composition among the extracts. The results showed that Terminalia catappa and Pometia pinnata extracts produced the highest band gap values, 3.36 eV and 3.35 eV respectively, indicating optical activity in the ultraviolet region. Musa spp. extract resulted in a band gap of 2.81 eV, while Moringa oleifera extract yielded the lowest value of 2.59 eV. These differences suggest that the type of plant extract significantly affects the optical characteristics of the synthesized BaTiO3. This research highlights the potential use of local biomass in the development of functional BaTiO3-based materials through green synthesis approaches.

PEMBINAAN DAN PENGELOLAAN LINGKUNGAN DI DESA SELAT BARU KECAMATAN BANTAN KABUPATEN BENGKALIS Zulfa, Zulfa; Dewi, Rahmi; Krisman, Krisman; Muhammad, Juandi
JURNAL BAKTI UPPR: Jurnal Pengabdian Kepada Masyarakat Vol 2 No 2 (2024): JURNAL BAKTI UPP: Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM Universitas PGRI Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54683/jbuppr.v2i2.117

Dalam rangka upaya penyelamatan lingkungan di Desa Sekat Baru, Kecamatan Bantan, Kabupaten Bengkalis, kegiatan pembinaan dan pengelolaan lingkungan difokuskan pada penguatan kapasitas pemerintah desa dan masyarakat, khususnya mereka yang tergabung dalam kelompok peduli kebakaran. Program ini bertujuan untuk membekali mereka dengan pengetahuan dan keterampilan yang diperlukan untuk mengelola dan menjaga lingkungan sekitar secara lebih efektif, serta memitigasi dampak dari kebakaran hutan dan lahan yang sering terjadi di wilayah tersebut. Kegiatan pembinaan ini dilaksanakan dengan pendekatan metodologi yang mengutamakan keterlibatan aktif peserta. Salah satu metode yang digunakan adalah ceramah, yang menjadi sarana untuk menyampaikan pengetahuan dasar terkait pengelolaan lingkungan yang berkelanjutan.

Edukasi Sari Kacang Hijau Untuk Mengatasi Anemia Pada Ibu Hamil Di Desa Sukapura Kecamatan Sragi Kabupaten Lampung Selatan Tahun 2024 Primadevi, Inggit; Anisah, Aan; Arti, Widi; Dewi, Dian Cynthia; Rohmawati, Rohmawati; Oktapiana, Putri Dian; Wulandari, Anna Dwi; Dewi, Rahmi; Trisnawati, Budi; Zannah, Miftahul
Journal Of Human And Education (JAHE) Vol. 4 No. 4 (2024): Journal Of Human And Education (JAHE)
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jh.v4i4.1253

The maternal mortality rate (MMR) is an indicator of the success of health services in Indonesia. Maternal death can occur due to anemia. The maternal mortality rate shows that the maternal mortality rate is 70% for anemic mothers. Anemia in pregnancy is also associated with increased maternal morbidity (Amalia, 2018). Anemia that commonly occurs during pregnancy is iron deficiency anemia. Iron (Fe) during pregnancy. Another way to reduce the incidence of anemia in pregnant women is not only to give Fe tablet supplements, but to be supported and assisted by providing food intake that is rich in iron. One type of legume that contains high iron is green beans. Green beans contain substances necessary for the formation of blood cells so they can overcome the effects of decreasing hemoglobin (USDA, 2016). The aim of this outreach to the community is to provide information and knowledge through educational outreach programs by carrying out preventive and promotive efforts to prevent and treat anemia in pregnant women. Counseling was carried out in Sukapura Village, Sragi District, South Lampung Regency in the Sragi Health Center Working Area. with a distance of 113 km from Aisyah Pringsewu University. Many health problems occur in the Puskesmas area. One of the health problems that must be addressed is anemia in pregnant women. So with this activity it is hoped that the community, especially pregnant women, will be able to understand and realize the importance of knowledge of green bean juice in overcoming anemia.

Co-Authors ', Krisman ', Krisman ', Nurmairanti ', Sugianto ', Susilawati Aan Anisah Adela, Adela Aisy, Rihla Datul Apriwandi Apriwandi . Aritonang, Surya Ardika Asrinaldo, Brian Noval Awaludin Martin Azhara, Vina Naomi Befriana Ayu Rizki Beniqna Maharani Besmaya Butarbutar, Kheny Kernila Detri Yulitah Dewi, Dian Cynthia Erman Taer Fauziana - Febrita, Ayang Fitri Hayati Hardanto, Lilik Tri Juandi Juandi Julnaidi, Julnaidi Khaironiati - Kresna, Pharada Krisman Krisman Manalu, Wesly Arianto Maslyah, Maharani Nur Mbantun Ginting Muhammad Nasir Nathania, Nazhiwa Nuraini, Nasywa Nursyafni, Nursyafni Nursyahara, Septia Oktapiana, Putri Dian Pasaribu, Veny Sriulina Pratiwi, Dinda Primadevi, Inggit Purba, Cenora Evelynza Putri, Nadja Melika Rahmad Efendi Rakhmawati Farma Richiy Brantasona Safri Awang Ali Rika Taslim Rini, Ari Sulistyo Rini, Ari Sulistyo Rohmawati Rohmawati Rusmanianty, Rusmanianty Safira, Putri Sari, Eza Tirta Sawitri, Seli Novalin Siti Komariah Taufiq Hidayat Tengku Said Hussain Shahab Tengku Said Luqman Hussain Shahab Tiara Pertiwi Titin Hartini Trisnawati, Budi Wahyu Akbar Illahi Widi Arti Wulandari, Anna Dwi Yanuar Hamzah Yanuar Yanuar, Yanuar Zannah, Miftahul Zuhdi Ma’aruf Zulfa Zulfa Zulkarnain Usman

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