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All Journal Jurnal Geliga Sains: Jurnal Pendidikan Fisika Jurnal Sains dan Teknologi Jurnal Neutrino : jurnal fisika dan aplikasinya Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI JOURNAL ONLINE OF PHYSICS Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Jurnal Fisika FLUX Edumatsains Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) Spektra: Jurnal Fisika dan Aplikasinya KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Gorontalo Agriculture Technology Journal Kumawula: Jurnal Pengabdian Kepada Masyarakat Journal of Engineering and Scientific Research (JESR) Journal of Appropriate Technology for Community Services Indonesian Review of Physics (IRiP) Jurnal Pendidikan Fisika dan Sains (JPFS) Journal of Innovation and Technology Jurnal Riset Fisika Indonesia Indonesian Journal of Community Empowerment Newton-Maxwell Journal of Physics Dharma Pengabdian Perguruan Tinggi (DEPATI) Science Technology and Management Journal (STMJ)

Fitri Afriani

Department Of Physics, Universitas Bangka Belitung

Author-ID : 220826

Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Model Konduktivitas Termal Nanofluida Berdasarkan Grup Tak-Berdimensi dengan Parameter Termofisika Kompleks Yuant Tiandho; Fitri Afriani
Jurnal Fisika FLUX Vol 17, No 1 (2020): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

This article presents a model of thermal conductivity of nanofluids based on dimensionless-group methods. In addition to the thermal conductivity of base fluids and nanoparticles, nanoparticle diameter, temperature, and volume fraction of nanoparticles, the proposed model involves several thermophysical parameters such as specific heat, density, and viscosity. The reason for the development of the model requires complex thermophysical parameters because, based on the experiments, these parameters determine the thermal conductivity of nanofluids. Validation of the model through comparison of the model with the experimental results shows that the models that have non-linear correlation have good accuracy in predicting the thermal conductivity of nanofluids.

Pengaruh Lama Pemanasan Terhadap Karakteristik Kristal Kalsium dari Limbah Cangkang Kerang Fitri Afriani; Mustari Mustari; Yuant Tiandho
EduMatSains : Jurnal Pendidikan, Matematika dan Sains Vol 2 No 2 (2018): Januari
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Kristen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/edumatsains.v2i2.606

The high number of tin mining in the Bangka Belitung Islands leaves a number of problems such as unused land after tin mining. Whereas on the other side, the post tin mining areas can be used as a source of water reserves although additional treatment is needed because it is feared contain heavy metals. Calcium oxide is a compound that can be used to coagulate dispersed pollutants in water so that it can be used to improve the quality of water stored in the post tin mining area. One of the most abundant sources of calcium in the Bangka Belitung Islands comes from wasted cockle shell. Through a heating process at temperatures of about 700Â°C calcium carbonate in the wasted cockle shell will begin to decompose into calcium oxide. Based on the results obtained have known that the longer the heating process then the decomposition process of calcium carbonate more and more occur. Keywords: Rietveld, calcium crystal, heat treatment.

Development of Hydroxyapatite-Based Bioceramic Hardness Model Based on Variations in Synthesis Conditions Fitri Afriani; Yuant Tiandho
Jurnal Inovasi Teknologi Vol 1 No 1 (2020): April
Publisher : Engineering Forum of Western Indonesian Government Universities Board (Forum Teknik, BKS-PTN Wilayah Barat) Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/jit.v1i1.2135

Hydroxyapatite is bioceramics which have conducive biocompatible property and have been widely used in bone scaffolds. Although they have potential development, there have not been any matematical model that elaborates the relation between the parameter of synthetic conditons and the mechanical properties of hydroxyapatite. That is why, this article tries to present the relation model between the hardness of hydroxyapatite based on variety of synthetic conditions and sintering temperature, relative density, and the size of particle as well. Developing hardness model is performed on the basis of its relation with the responses from each experiment factor. Validating model which was carried out through comparison between the model and the data of experiments indicates that the model proposed has a good accuracy and capable for explaining the bond between the parameter of synthetic and the hardness of hydroxyapatite.

Sintesis Karbon Aktif Tempurung Ketapang (Terminalia catappa) Sebagai Adsorben Minyak Jelantah Megiyo Megiyo; Herman Aldila; Fitri Afriani; Robby Gus Mahardika; Sito Enggiwanto
Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2017: Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) 2017
Publisher : Universitas Sebelas Maret

Abstract: Activated carbon is the most common adsorbents used in regeneration of cooking oil process. Waste frying oil is a residual of frying that has been destructed due to repeated use. For reusable, it must through by oil regeneration process to eliminate impurities and free radicals. One of the abundant biomass and feasible to be activated carbon is ketapang shell. The synthesis of activated carbon used activator H2SO4 11% with ratio 1: 4 (w / v) followed by thermal activation at 650oC for 2 hours. Activated carbon is then mixed with waste frying oil with variations of 5%, 7.5% and 10% and is left for 24 hours. As an antioxidant to free radicals added extract iding-iding (Stenochlaena palustris) of 5%. Based on the observation data SEM pore distribution on activated charcoal fairly evenly with the average pore width around 10 mm. The results of acid number and free fatty acid test showed that the greater amount of activated carbon used, the value of acid number and free fatty acid content will decrease. The optimum condition was obtained on 10% active carbon and 5% extract with 0.8% acid value and 0.78% free fatty acid content. Abstrak: Karbon aktif merupakan salah satu adsorben yang umum digunakan dalam upaya peningkatan regenerasi minyak jelantah. Minyak jelantah merupakan limbah hasil sisa penggorengan yang telah terdestruksi akibat pemakaian yang berulang-ulang. Untuk dapat digunakan kembali minyak jelantah harus mengalami proses regenerasi minyak untuk menghilangkan impuritas dan radikal bebas. Salah satu biomassa yang begitu melimpah dan layak untuk dijadikan karbon aktif adalah tempurung ketapang. Sintesis karbon aktif tempurung ketapang dilakukan dengan menggunakan aktivator H2SO4 11% dengan perbandingan 1:4 (b/v) dilanjutkan dengan aktivasi termal pada temperatur 650oC selama 2 jam. Karbon aktif yang diperoleh kemudian dicampurkan dengan minyak jelantah dengan variasi 5%, 7,5% dan 10% dan dibiarkan selama 24 jam. Sebagai penangkal radikal bebas ditambahkan ekstrak iding-iding (Stenochlaena palustris) sebesar 5%. Berdasarkan hasil pengamatan data SEM sebaran pori pada arang aktif tempurung ketapang cukup merata dengan lebar pori rata-rata berkisar 10 mm. Hasil uji bilangan asam dan kadar asam lemak bebas menunjukkan bahwa semakin besar jumlah karbon aktif yang digunakan maka nilai bilangan asam dan kadar asam lemak bebas akan semakin menurun. Kondisi optimum diperoleh pada komposisi 10% karbon aktif dan 5% ekstrak iding-iding dengan nilai bilangan asam 0,8% dan kadar asam lemak bebas 0,78%.

THE DESIGN OF DISPLAY DIGITAL DATA INTERFACE CLAMP-METER COMPLEMENTED BY SENSOR GMR (GIANT MAGNETORESISTANCE) Yulkifli Yulkifli; Fitri Afriani; Yohandri Yohandri; Ramli Ramli
Spektra: Jurnal Fisika dan Aplikasinya Vol 5 No 1 (2020): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 5 Issue 1, April 2020
Publisher : Program Studi Fisika Universitas Negeri Jakarta

This article discusses the design of a robust data interface system that displays an electric current using the GMR sensor. Robust measurement of electrical current to detect magnetic fields contained in the current-carrying wire. The magnetic field on the cable should be the input signal to the GMR sensor to be processed by the interface program. This interface used the Arduino IDE program and displayed in the LCD screen. This research is an experimental research laboratory. The results of the data interface can be displayed in the form of comparative measurements with the power of the conventional electric current. Comparison measurements can be viewed in graphical form. The results of the study have an average measurement accuracy of 91.2%, with an average of 0.96. Besides, this study also obtained a standard deviation of 0.21 and an average error of 0:08.

Green-Synthesis Of Silver Nanoparticles Based On Bioreductor Key Orange Extract As Antibacterial Fitri Afriani; Susanti Susanti; Fadillah Ramadhani; Muntaz Soraya; Evi.J Evi.J
KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Vol 7 No 1 (2022): KONSTAN (Jurnal Fisika dan Pendidikan Fisika)
Publisher : Universitas Islam Negeri (UIN) Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/konstan.v7i01.101

Silver nanoparticles are nano-sized particles ranging from 1-100 nm which are commonly used as antifungal and antibacterial agents in various products. In this study, silver nanoparticles were synthesized from a natural bioreductant, namely key orange peel extract. The silver nanoparticle phase which was successfully synthesized and then XRD test was carried out was cubic in shape with the highest peak at 2θ : 38.1959˚; 44.4038˚; 64.5491˚ The lattice parameter of silver nanoparticles is a=b=c= 4.0861 . The resulting crystal structure of silver nanoparticles is cubic with a crystallite size of 39.84 nm, in addition to XRD test, XRF test was conducted to determine the main constituent components of silver nanoparticles, while the main component of synthesized silver nanoparticles was Ag of 97.66%. Antibacterial activity of silver nanoparticles was indicated by the formation of inhibition against the growth of Staphylococcus aureus bacteria with a clear zone formed around 12.091 mm. Therefore, the antibacterial inhibition formed from the silver nanoparticles synthesized in this study can be classified as a strong antibacterial property.

SOSIALISASI TEKNIK PENYIMPANAN PRODUK HASIL TANGKAPAN LAUT DENGAN METODE BEKU DI DESA PENYAK Fitri Afriani; Yekti Widyaningrum; Widodo Budi Kurniawan; Herman Aldila; Yuant Tiandho
Journal of Appropriate Technology for Community Services Vol. 1 No. 2 (2020)
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/jattec.vol1.iss2.art8

In this paper, the location that is targeted for community service activities is Penyak Village, Koba Sub-District, Central Bangka Regency. The majority of the profession of the Penyak Village community are fishermen because the village is directly adjacent to the South China Sea. Maritime resources in Penyak Village are quite abundant including various types of fish, shellfish and small crab. But most people who market these resources have not used techniques for storing fishery products. Therefore, it is feared that the fishery products will decline in quality. The solution offered to this community service is the socialization of frozen fishery product storage. In addition, in order for the community to directly utilize it, the freezer box equipment was provided to Penyak Village. Through the evaluation process, it is known that the freezer box provided can be utilized by Penyak Village community, especially for storing food products.

Pelatihan Pemanfaatan Limbah Plastik Menjadi Berbagai Kreasi Daur Ulang Bagi Masyarakat Desa Penyak Yuant Tiandho; Herman Aldila; Yekti Widyaningrum; Tri Kusmita; Anisa Indriawati; Widodo Budi Kurniawan; Fitri Afriani
Journal of Appropriate Technology for Community Services Vol. 2 No. 2 (2021)
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/jattec.vol2.iss2.art2

As an archipelago, handling plastic waste in the Province of Bangka Belitung Islands is an aspect that needs to be taken seriously. Apart from being focused on developing tourist areas, plastic waste will easily be carried to the sea and prone to be degraded into microplastics, often consumed by marine animals. This community service activity focuses on Penyak Village, Kec. Koba, Kab. Central Bangka, Bangka Belitung Islands. To solve the plastic problem in that location, the community service team conducted training for the community, especially for Pendidikan Kesejahteraan Keluarga (PKK) members, related to processing plastic waste into various recycled creations such as bags, pencil cases, and different kinds of souvenirs. The training program is carried out by providing materials and direct training to increase the understanding and skills. To broaden people's insights, the team conducted training with the Ecoplantstic start-up, which focuses on developing waste-based products. Through the evaluation, it is known that the training provided can improve the knowledge and skills of the community in processing plastic waste into various recycled creations, and several participants plan to develop the skills acquired for entrepreneurial purposes.

Synthesis of Calcium Phosphate from Cockle Shell Loaded by Silver Nanoparticle and Its Antibacterial Activity Evaluation Yuant Tiandho; Rahmad Lingga; Evi.J Evi.J; Rifqi Almusawi Rafsanjani; Fitri Afriani
Indonesian Review of Physics (IRiP) Vol. 4 No. 2 (2021)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v4i2.4920

This study aimed to synthesize calcium phosphate loaded with silver nanoparticles and evaluate its antibacterial activity. We used cockle shells waste as raw material to prepare calcium phosphate. X-ray diffraction analysis showed that the constituent phases of calcium phosphate consist of hydroxyapatite (HA) and β-tricalcium phosphate (β-TCP). The incorporation process of silver nanoparticles on calcium phosphate was carried out in colloidal silver nanoparticles via the green-synthesis method using Citrus x microcarpa Bunge peel extract. The presence of colloidal silver nanoparticles through the green synthesis method was identified using UV-Vis spectrophotometer by the peak of the absorption band that occurred at 468 nm. The incorporation of silver nanoparticles into calcium phosphate did not significantly change the crystalline properties of HA and β-TCP. Evaluation of the antibacterial activity showed the silver nanoparticles had a strong antibacterial effect against Staphylococcus aureus, which also occurs in calcium phosphate loaded by silver nanoparticles. After being incorporated with silver nanoparticles, Calcium phosphate generally has no antibacterial effect. After being incorporated with silver nanoparticles, an inhibition zone with a diameter of about 9.8 mm can form. These results indicated that the method proposed in this study could be an alternative for developing calcium phosphate, which requires self-sterilization properties.

Pengukuran Koefisien Serapan Bunyi Spons dan Styrofoam dengan Menggunakan Smartphone Sandi Sandi; Kumalasari Kumalasari; Jefri Akbar; Rospita Sari; Fitri Afriani
Jurnal Riset Fisika Indonesia Vol 1 No 1 (2020): Desember 2020
Publisher : Jurusan Fisika, Universitas Bangka Belitung

In this study, we analyzed the characteristics of samples sound absorption coefficient from sponge and styrofoam using a smartphone. The sound absorption coefficient is measured using a sound level meter and a frequency generator installed on a smartphone to determine the sound absorption coefficient. Samples were formed in circles with different thickness variations ranging from 1.5 cm to 15 cm. Through the tests that have been done, it can be seen that styrofoam has a higher sound absorption coefficient value than sponges. This research provides an alternative solution for measuring the sound absorption coefficient based on a smartphone device so that it is easy to apply, primarily to support the learning process related to sound material.

Co-Authors Andrian Saputra Anisa Indriawati Asep Saefullah Diana Novita Sari Diana Novita Sari, Diana Novita Evi . J Evi J Evi J Evi.J Evi.J Evi.J Evi.J Fadillah Ramadhani Herman Aldila Indra Pardede Jefri Akbar Kumalasari Kumalasari Kumalasari Kumalasari Lingga, Rahmad Lizia Miratsi Lizia Miratsi Mahjur Mahjur Mahjur Mahjur Maryana, Okky Megiyo Megiyo Megiyo Megiyo Muntaz Soraya Mustari Mustari Nur Hamrin Rafsanjani, Rifqi Almusawi Rahmad Lingga Ramli Ramli Rena Aprilianti Rifqi Almusawi Rafsanjani Rifqi Almusawi Rafsanjani Rika Favoria Gusa Robby Gus Mahardika Rospita Sari Sandi Sandi Sari Wulan Siska Oktaviyani Siska Oktaviyani Siswoyo Siswoyo Sito Enggiwanto Susanti Susanti Tri Kusmita Wahri Sunanda Widodo Budi Kurniawan Yekti Widyaningrum Yekti Widyaningrum Yohandri Yuant Tiandho Yulkifli Yulkifli Yunita Febriani Zaitun Zalva Humaeroh

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