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All Journal Jurnal Neutrino : jurnal fisika dan aplikasinya JGE (Jurnal Geofisika Eksplorasi) JOURNAL ONLINE OF PHYSICS Jurnal Pengabdian UntukMu NegeRI BIOLINK (Jurnal Biologi Lingkungan, Industri, Kesehatan) JURNAL PHOTON Jurnal Ilmu Fisika Jurnal Pengabdian Papua JURNAL FISIKA PAPUA Sipakaraya : Jurnal Pengabdian Masyarakat
Ngaderman, Hubertus
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Monte Carlo Simulation to Understand the Working Mechanism of The Electrolytes Lithium Hexafloorophosphate and Ethylene Carbonate Sinaga, Ego Srivajawaty; Ngaderman, Hubertus
Jurnal Ilmu Fisika Vol 18 No 1 (2026): March 2026 (Forthcoming Issue)
Publisher : Jurusan Fisika FMIPA Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.18.1.1-13.2026

Abstract

Monte Carlo (MC) simulations provide a powerful approach to investigate electrolyte–electrode interactions and to optimize battery design. This study aims to determine the entropy and average energy of a lithium salt–ethylene carbonate (EC) system, as these parameters are essential for evaluating the Boltzmann factor. The Boltzmann factor was derived from entropy concepts and the principle of maximum entropy, which involves the Boltzmann constant (k) and the number of accessible states (Ω). Simulations were performed using Lennard–Jones parameters within a canonical ensemble framework to compute entropy and energy for systems with varying atom numbers. Results show that the system entropy for two atom types (200 atoms) was 6.67 × 107 kJ·mol–1·K–1. For three atom types (300 atoms), the equilibrium entropy reached 1.1 × 1010 kJ·mol–1·K–1, and for four atom types (400 atoms), 1.3 × 1013 kJ·mol–1·K–1. When reduced to five atom types with only 300 atoms (to minimize computational cost), the entropy was 2.4 × 108 kJ·mol–1·K–1. The simulations, employing the Metropolis criterion, successfully identified globally stable configurations, providing new insights into entropy-driven behavior in lithium battery electrolytes.
IDENTIFIKASI PATAHAN SEISMO-TEKTONIK JAYAPURA BERDASARKAN PEMODELAN INVERSI 3D DATA GRAVITASI Sudrajad, Bangkit; Sutarman, Tatang; Sinaga, Ego Srivajawaty; Ngaderman, Hubertus
JGE (Jurnal Geofisika Eksplorasi) Vol. 10 No. 1 (2024)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v10i1.372

Abstract

Pada awal tahun 2023 wilayah Kota Jayapura dan sekitarnya mengalami gempabumi dengan seismisitas yang tinggi dan terjadi terus menerus. Gempabumi tersebut termasuk ‘Black Swan Earthquakes’ karena di luar prediksi para ahli; langka terjadi; dan sumber gempabumi belum terpetakan dengan baik. Berkaitan dengan hal tersebut maka dilakukan pemodelan 3D struktur bawah permukaan menggunakan metode gravitasi untuk mengidentifikasi struktur patahan pada sebaran episenter gempabumi Jayapura. Data yang digunakan adalah sebanyak 9021 titik data medan gravitasi GGMplus yang melingkupi wilayah darat dan laut; data model elevasi digital; data hiposenter gempabumi; data peta geologi; dan data densitas sampel batuan di lapangan. Dari hasil pengolahan peta anomali gravitasi dan pemodelan inversi 3D struktur bawah permukaan, ditemukan pola kontur anomali gravitasi dan distribusi densitas bawah permukaan yang mengindikasi keberadaan patahan di dasar laut sebelah utara Kota Jayapura pada koordinat 2,44092° LS (UTM Y=9730,20 km). Berdasarkan hasil interpretasi model akhir 3D dapat disimpulkan bahwa patahan gempabumi yang teridentifikasi tersebut merupakan patahan naik dengan orientasi membujur berarah Barat-Timur. 
IDENTIFICATION OF THE INTERACTION OF LITHIUM HEXAFLUOROPHOSPHATE SALT AND ETHYLENE CARBONATE (EC) SOLVENT IN LITHIUM ION BATTERY REDOX EVENTS USING CLASSICAL MOLECULAR DYNAMICS (MD) SIMULATION Ngaderman, Hubertus; Sinaga, Ego Srivajawaty
Jurnal Neutrino:Jurnal Fisika dan Aplikasinya Vol 16, No 2 (2024): APRIL
Publisher : Universitas Islam Negeri Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/neu.v16i2.23910

Abstract

The aim of the research is to find the maximum velocity possessed by the molecules (Maxwell velocity distribution) of the solvation event of lithium hexafluorophosphate salt  interacting with ethylene carbonate (EC) solvent. We examined the electrolyte simulation of the reaction between lithium ions  and hexafluorophosphate  with ethylene carbonate (EC) solvent while the potential involved is the Lennard Jones potential. We use the epsilon (ε) and sigma (σ) parameters of Lennard Jones. These parameters are the independent variables used as a reference in determining the response variable which is the velocity of the molecules. Due to the large number of molecules involving the parameters and response variables per molecule mentioned above, we use a microcanonical assembly system (N, V, E) where the number of particles (N), system volume (V) and energy (E) are constant. The energy kT and the distance between molecules σ of 1 are inputted to the program in order to facilitate the computer in the simulation process. Solvation events where litium hexafluorophosphate  salt and solvent ethylene carbonate  interact then in the final positions of particles (equilibrium) the result is almost symmetry randomly in all planes. The velocity used is the most frequent velocity ( ) and is related to the kinetic energy.
Pelatihan Pembuatan Filter Air Sumur Bor Dan Survei Identifikasi Akuifer Air Tanah Sebagai Upaya Penyediaan Sumber Air Bersih Bagi Warga Kelurahan Gurabesi Jayapura Papua Sudrajad, Bangkit; Sutarman, Tatang; Sinaga, Ego Srivajawaty; Ngaderman, Hubertus; Muzzaki, Fauzan Afraa; Kurni, Yoseph Nelson
Jurnal Pengabdian UntukMu NegeRI Vol. 9 No. 3 (2025): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jpumri.v9i3.10199

Abstract

Kegiatan pengabdian masyarakat di RW 06 Kelurahan Gurabesi, Jayapura Utara, dilatarbelakangi oleh pencemaran air bersih akibat keterbatasan akses air tanah, pencemaran lingkungan, dan kondisi geografis wilayah di dataran tinggi. Tujuan utama program ini adalah meningkatkan kapasitas masyarakat dalam penyediaan air bersih melalui pelatihan pembuatan filter air dan pemetaan akuifer. Kegiatan dilakukan secara partisipatif melalui tahapan sosialisasi, pelatihan, penerapan teknologi, pendampingan, dan evaluasi. Teknologi yang diperkenalkan berupa filter air sumur bor tipe low pressure dengan media pasir zeolit, silika, ferolit, manganese greensand, dan karbon aktif. Survei geofisika menggunakan tomografi resistivitas berhasil mengidentifikasi lapisan batuan terfragmentasi yang berpotensi menyimpan air tanah, sekaligus mengungkap risiko pencemaran dari limbah rumah tangga dan aktivitas pendulangan. Hasil pelatihan menunjukkan peningkatan pengetahuan mitra sebesar 47,27%. Hasil pelatihan dan pendampingan meunjukkan peningkatan kapsitas mitra pada aspek produksi yang ditunjukkan oleh dihasilkannya lima unit filter air oleh mitra dan tim pengabdi.
Co-Authors Anou, Kezia Anou, Kezia N. Anou, Kezia Noviani Bangkit Sudrajad Benny Abraham Bungasalu Bunga', Martina Daniel Napitupulu Daniel Napitupulu Ego Srivajawati Sinaga Ego Sriwijayaty sriwijayati Eva Papilaya Flinn C Radjabaycolle Kezia Noviani Anou Kezia Noviani Anou Kurni, Yoseph Nelson Maikson Molama Martina Bunga Muzzaki, Fauzan Afraa Napitupulu, Daniel Noper Tulak Payage, Yohanis Rahman Rahman Rahman Rahman S, Ego Srivajawaty Saputrina, Truly Theresia Sinaga, Novianti Sutarman, Tatang Tabuni, Wani Truly Theresia Saputrina Yulia Fitri Yulia Fitri Zakaria Victor Kareth