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Indriawati, Anisa
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Analisis Kestabilan Lereng Tunggal Menggunakan Metode Fellenius dan Slide v.6.0 serta Lereng Keseluruhan dengan GeoStudio 2012 pada Pit I Banko Barat PT Bukit Asam (Persero) Tbk Tanjung Enim – Sumatera Selatan: Single Slope Stability Analysis using Fellenius Method and Slide v.6.0 and Overall Slope Stability with GeoStudio 2012 at Pit I Banko Barat PT Bukit Asam (Persero) Tbk Tanjung Enim –South Sumatera Simanjuntak, Devito Wirasto; Fahraini, Ferra; Indriawati, Anisa
MINERAL Vol 3 No 1 (2018): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v3i1.1576

Abstract

Slopes are a topography that is often found in opened pit mine that had been made by humans with the purpose of exploiting minerals that exist. Landslides can occur on any slopes that is formed due to the increase of shear stress, shear strength declining in the field of landslides or both simultaneously. Slope stability analysis performed to obtain the value of the safety factor of the field of potential landslides. The study conducted at a coal mine Pit 1 Banko Barat PT Bukit Asam (Persero) Tbk by comparing the value of a single slope safety factor Fellenius with manual method to Slide v.6.0 software and the overall slope safety factor with software GeoStudio 2012 From the analysis performed on a single slope 1 to 9, safety factor values ​​obtained below 1.25 for single slopes 1 and single slope 2 to 9 above 1.25. Of the value of the safety factor is obtained, a single slope 1 in critical condition and the single slopes 2 to 9 in stable condition. While the overall slope stability analysis using GeoStudio 2012 program obtained average value of the safety factor - average is 4.57 so the slope can be declared in a stable condition. Then there are effforts to increase the safety factor (FK) of single slopes by changing a single slope geometry previously at an angle of 55 ° to 47 ° in order to obtain the condition of the slopes in a stable condition.
The Potential of Pepper Shell (Piper Nigrum) for Supercapacitor Electrodes Kurniawan, Widodo Budi; Indriawati, Anisa; Marina, Dewi; Taer, Erman
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 8 No 1 (2019): 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.v8i1.3780

Abstract

A study has been carried out on supercapacitor electrodes as an electrical energy storage media based on pepper shell activated carbon. The Synthesis is done by mixing the waste carbon pepper shell with an activator HCl with a ratio of 1 : 4. Furthermore, the activated carbon is activated physically by using a pyrolysis temperature of 600 0C. The SEM results indicate that carbon has a porous morphology with a pore size of 24.6 nm which is a mesoporous category. Electrochemical properties are analyzed using cyclic voltammetry (CV). The CV results at the scan rate of 1 mV/s indicate the specific capacitance value generated is 0.45 Fg-1. The results showed that pepper shell waste has the potential to be used as a supercapacitor electrode material
Simulasi Mikromagnetik untuk Menganalisis Dampak Bentuk Geometri terhadap Sifat Magnetik Material Permalloy vavionita, Fenni; Indriawati, Anisa; Aldila, Herman
Jurnal Riset Fisika Indonesia Vol 5 No 2 (2025): Juni
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v5i2.5430

Abstract

The development of ferromagnetic material technology is currently experiencing very rapid progress in various fields. One of the technological developments in the field of developing ferromagnetic materials based on thin layers of soft magnetic properties is used in the manufacture of recording heads, Magnetic Tunnel Junction (MTJ) contained in Magnetoresistive Random Access Memory (MRAM) and various sensors. One example of a ferromagnetic material with softmagnetic properties is permalloy. Permalloy has high permeability and a magnetic moment configuration that is easily controlled with small changes in the magnetic field. The advantage of permalloy is that apart from its high permeability, it also has low coercivity, resistance to oxidation, and significant anisotropic magnetoresistance. Therefore, in this research micromagnetic simulations have been carried out for thin layers using permalloy material. This research was carried out using the OOMMF (Object Oriented Micromagnetic Framework) software simulation to obtain the influence of the shape of the permalloy material on the magnitude of the magnetization value, coercivity value and anisotropy energy value produced due to the influence of an external magnetic field. The research results show that the shift in the magnetic wall domain in this study produces different magnetization values ​​in each form of permalloy material, the difference in shape also affects the field coercivity value and the anisotropy energy value. This can be seen when the external magnetic field applied is 5000 Oe, the magnetization value in form 1 is 0.99997, with a coercivity field of 680 Oe and an anisotropy energy value of 5.72 × 10-28, for form 2 it has a magnetization value of 0, 9806628, with a coercivity field of 1240 Oe and an anisotropy energy value of 3.55 × 10-25, and form 3 has a magnetization value of 0.942093 with a coercivity field of 960 Oe and an anisotropy energy value of 1.00 × 10-25. An increasing magnetization value indicates that the material is saturated, and the resulting anisotropy energy value becomes smaller.
PENGUATAN LITERASI AKADEMIK MELALUI PELATIHAN KARYA TULIS ILMIAH UNTUK MEMBANGUN GENERASI CENDIKIA DI MAN INSAN CENDIKIA BANGKA TENGAH Kusmita, Tri; Puspita, Indah; Indriawati, Anisa; Saputri, Riny
Dharma Pengabdian Perguruan Tinggi (DEPATI) Vol 4 No 2 (2024): November 2024
Publisher : Fakultas Sains dan Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/depati.v4i2.5708

Abstract

The training on scientific writing (KTI) for teachers at MAN Insan Cendikia Bangka Tengah represents a strategic step to enhance scientific literacy, given that KTI is a requirement for graduation and class advancement. This training aims to improve teachers' understanding of scientific writing through a guided tutorial method that combines theory with practical application. This method is designed to assist teachers in grasping the stages of KTI writing, from topic selection to proper citation techniques. Results following the training indicate a significant improvement in teachers' comprehension of KTI writing. Therefore, this training not only strengthens the academic literacy skills of teachers but also prepares them to guide students more effectively, thereby creating a quality educational environment that supports the development of an intellectual generation.
Purification and Characterization of Monazite from Bangka using Mechanical-Magnetic Separation Method Aldila, Herman; Indriawati, Anisa; Putro, Permono Adi
Jurnal Penelitian Pendidikan IPA Vol 10 No 5 (2024): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i5.6644

Abstract

In this research, the purification and characteristics of monazite, a by-product of the tin ore enrichment process. Monazite is given pre-treatment to monazite sand using the mechanical-magnetic separation method to increase the content of rare earth metal elements. Based on the results of the analysis of monazite samples from Tin mine tailings concentrate that has been purified, the dominant elements of the highest rare earth metals are cerium (Ce), lanthanum (La), neodymium (Nd), and Yttrium (Y). The mechanical-magnetic separation method, monazite from Tin mine tailings concentrate can have higher purity. These rare earth metal elements can be further extracted or synthesized; and used as supporting or even main materials in developing advanced technological industries.
PROFIL KEPADATAN DAN ARUS PADA TASEP 2D DENGAN VARIASI PROBABILITAS INPUT DAN OUTPUT PADA JUNCTION Indriawati, Anisa
Jurnal Riset Fisika Indonesia Vol 1 No 1 (2020): Desember 2020
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v1i1.2020

Abstract

Salah satu pemodelan yang dapat menggambarkan kepadatan kendaraan pada suatu jalan adalah Totally Asymentric Simple Exclusion Process (TASEP). TASEP merupakan suatu proses stokastik dimana partikel yang menempati sebuah kekisi akan bergerak ke kekisi tetangga terdekat selama kekisi tersebut tidak ditempati partikel lain. Pada penelitian ini telah dilakukan pemodelan TASEP 2D dengan satu input dan dua output. Hal ini bisa dianalogikan sebagai fenomena yang terjadi pada kendaraan yang memasuki sauatu jalan pertigaan. Profil kepadatan dianalisis berdasarkan perubahan input dan output. Fase yang terjadi pada penelitian ini ialah MC-LD-HD dan LD-LD. Arus maksimal terjadi ketika kepadatan partikel memiliki fase MC, dimana probabilitas maksimal arus kepadatan adalah 0.125.Salah satu pemodelan yang dapat menggambarkan kepadatan kendaraan pada suatu jalan adalah Totally Asymentric Simple Exclusion Process (TASEP). TASEP merupakan suatu proses stokastik dimana partikel yang menempati sebuah kekisi akan bergerak ke kekisi tetangga terdekat selama kekisi tersebut tidak ditempati partikel lain. Pada penelitian ini telah dilakukan pemodelan TASEP 2D dengan satu input dan dua output. Hal ini bisa dianalogikan sebagai fenomena yang terjadi pada kendaraan yang memasuki sauatu jalan pertigaan. Profil kepadatan dianalisis berdasarkan perubahan input dan output. Fase yang terjadi pada penelitian ini ialah MC-LD-HD dan LD-LD. Arus maksimal terjadi ketika kepadatan partikel memiliki fase MC, dimana probabilitas maksimal arus kepadatan adalah 0.125.
Uji Linieritas Kalium Tiosianat (KSCN) Sebagai Indikator Kolorimetri Untuk Mendeteksi Konsentrasi Fe Pada Air Fahmi, Azrul; Kurniawan, Widodo Budi; Indriawati, Anisa
Jurnal Riset Fisika Indonesia Vol 2 No 2 (2022): Juni 2022
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v2i2.3215

Abstract

The method of testing water quality that is in great demand by researchers because it is practical and inexpensive, one of which is the colorimetric method. To detect the concentration of Fe using a colorimetric method used a colorimetric indicator such as potassium thiocyanate (KSCN). KSCN is a compound consisting of the elements potassium (K), sulfur (S), carbon (C), and nitrogen (N) which can produce an orange color when reacted with Fe. In this study, 20 variations of Fe solution were used with a concentration difference of 0.5 ppm starting from 0.5 ppm to 10 ppm and obtained a correlation coefficient of 0.9962 through the UV-Vis spectrophotometer test so that potassium thiocyanate (KSCN) can be used as a colorimetric indicator for detect the concentration of Fe in water.
Analisis Anomali Gravity Daerah Panas Bumi Non-Vulkanik Di Bangka Tengah (Studi Kasus Panas Bumi Terak dan Keretak) Gusnia, Eri; Kusmita, Tri; Indriawati, Anisa
Jurnal Riset Fisika Indonesia Vol 2 No 2 (2022): Juni 2022
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v2i2.3233

Abstract

Central Bangka is one area that has geothermal potential such as the Terak and Keretak area. These area have hot spring manifestation. Geothermal manifestations in Bangka is the type of non-volcanic radiogenic geothermal. Origin sources of this manifestation suspected from rocks run into the crack, folds and faults. The purpose of this study was to identify rock speading in geothermal area and it’s correlation between geothermal manifestation in Terak and Keretak. The data obtained from the TOPEX/Poseidon satellite is in the form of FAA (Free Air Anomaly) data. The data is then corrected using Burger correction and field correction. Spectral analysis was performed by Fourier transform with moving average filter. The results showed that Complete Bouger Anomaly has 13 mGal-39 mGal. Regional anomaly has 5,4 mGal - 9.8 mGal. Residual anomaly has 7 mGal sampai 29 mGal. There area was consist of intrusive granite rock from the Granite Klabat formation, clas and sandstone from Tanjung Genting Formation. Gravity anomaly shown Geothermal Terak and Keretak are composed of the same distribution of rock.
Pengaruh Penambahan Karbon Aktif Dari Kulit Lada dan Suhu Aktivasi Karbon terhadap Nilai Konduktivitas Anoda Berbasis LTO Akbar, Jefri; Kurniawan, Widodo Budi; Widyaningrum, Yekti; Indriawati, Anisa
Jurnal Riset Fisika Indonesia Vol 4 No 1 (2023): Desember 2023
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v4i1.3823

Abstract

Sintesis Teori A dan B sebagai Upaya Menjelaskan Inonsistensi Teori C dalam Proses Agitated Leaching Tailing Timah Sahroni, Muhammad; Indriawati, Anisa; Kurniawan, Widodo Budi
Jurnal Riset Fisika Indonesia Vol 3 No 2 (2023): Juni 2023
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v3i2.4125

Abstract

Inkonsistensi teori C merupakan anomali dimana teori C tidak berlaku dalam proses Agitated Leaching. Hal ini menuntut penjelasan sehingga banyak peneliti berspekulasi untuk menjelaskannya. Contohnya teori A yang kontra- intuitif dan teori B yang cenderung menentang teori A. Dalam penelitian ini telah dilakukan penyelidikan terhadap teori A dan B melalui pendekatan tidak-langsung dengan variabel terikat dari proses Agitated Leaching adalah Total Dissolved Solid (TDS), laju pengadukan sebagai variabel bebas dan variabel tetap adalah rasio solid-likuid (1:20 Gr/mL) dan lama pengadukan (10 menit). Proses pelaruran dilakukan pada keadaan STP dan membatasi proses hanya pada tahap pelarutan sampel menggunakan HNO3 5%. Sampel yang digunakan adalah pasir tailing timah. Hasil penelitian menunjukkan bahwa inkonsistensi terjadi pada laju pengadukan 1000 rpm. Teori A1 tidak dapat disimpulkan keberlakuannya dalam proses pelindian tailing timah. Teori A2 berlaku dalam proses pelindian tailing timah. Teori B berlaku dalam proses pelindian tailing timah.
Co-Authors Adi Kurniawan Afni, Githa Nurvilia Akbar, Jefri Andina Syafrina Antasari, Deza Pahlevi Asisah, Tina Awwab Hafizh Azrul Fahmi Daus, Reza Firdaus Fir Dea Amelia, Dea Erman Taer Fahraini, Ferra Gusnia, Eri Herman Aldila Indah Puspita, Indah Irvani, Irvani Marina, Dewi Miratsi, Lizia Permono Adi Putro Sahroni, Muhammad Saputri, Riny Setiawan, Ahmad Reza Simanjuntak, Devito Wirasto Tampubolon, Amri Tono, E.P.S.B Taman Tri Kusmita vavionita, Fenni Widodo Budi Kurniawan Widyaningrum, Yekti