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Home > Archives > Vol 8, No 2: August 2026

DOI: https://doi.org/10.37905/jjom.v8i2

Table of Contents

Articles

On Deformed-Metric Equivalence of Hilbert Space Operators DOI : 10.37905/jjom.v8i2.36685 | Abstract views : 63 times Amenya Collins,  Maasai Mara University,  Kenya Victor Wanjala,  Maasai Mara University,  Kenya John Matuya,  Maasai Mara University,  Kenya

PDF 138-142

The Expected-Based Method of Value-at-Risk Prediction DOI : 10.37905/jjom.v8i2.37273 | Abstract views : 66 times Jacob Stevy Seleky,  Matana University,  Indonesia Lina Cahyadi Cahyadi,  Pelita Harapan University,  Indonesia Sausan Ramadhani,  Matana University,  Indonesia

PDF 143-151

A Construction of a Smooth Travel Groupoid on a Spanning Tree Associated with Lotus Graphs DOI : 10.37905/jjom.v8i2.38029 | Abstract views : 88 times Husnul Khotimah,  Universitas Sriwijaya,  Indonesia Andi Tenri Ajeng Nur,  Universitas Sriwijaya,  Indonesia Putri Nilam Cayo,  Universitas Sriwijaya,  Indonesia

PDF 152-158

Optimal Control of an Age-Structured Pneumonia Transmission Model with Vaccination and Treatment Strategies DOI : 10.37905/jjom.v8i2.38190 | Abstract views : 43 times Dwi Lestari,  Universitas Negeri Yogyakarta,  Indonesia Nikenasih Binatari,  Universitas Negeri Yogyakarta,  Indonesia Eminugroho Ratna Sari,  Universitas Negeri Yogyakarta,  Indonesia

PDF 159-168

Modeling and Optimizing State-Based Electricity Consumption Distributions in Dodoma Region, Tanzania Using Hidden Markov Models DOI : 10.37905/jjom.v8i2.34047 | Abstract views : 53 times Eliasi M Jeremiah,  University of Mzumbe, Morogoro,  Tanzania, United Republic of Ramkumar T Balan,  The University of Dodoma, Dodoma,  Tanzania, United Republic of Jairos K. Shinzeh,  The University of Dodoma, Dodoma,  Tanzania, United Republic of

PDF 169-187

Hyperparameter-Optimized Gradient Boosting for Daily Rainfall Prediction Using BMKG Meteorological Data in Malang Regency, Indonesia DOI : 10.37905/jjom.v8i2.38554 | Abstract views : 58 times Mohamad Arif Abdul Syukur,  UIN Maulana Malik Ibrahim,  Indonesia Suhartono Suhartono,  UIN Maulana Malik Ibrahim,  Indonesia Mochamad Imamudin,  UIN Maulana Malik Ibrahim,  Indonesia

PDF 188-201

Geographically and Temporally Weighted Log-Logistic 3-Parameter Regression Model for Poverty Severity Index : A Case Study on East Java Province DOI : 10.37905/jjom.v8i2.38021 | Abstract views : 51 times Nur Huda,  Institut Teknologi Sepuluh Nopember,  Indonesia Purhadi Purhadi,  Institut Teknologi Sepuluh Nopember,  Indonesia Tintrim Dwi Ary Widhianingsih,  Institut Teknologi Sepuluh Nopember,  Indonesia

PDF 202-208

Optimal IDX30 Stock Portfolio Construction Using a Two-Constraint Mean-Variance Model with Robust S-Estimation DOI : 10.37905/jjom.v8i2.39603 | Abstract views : 57 times Anis Faiqo Tuzzainiyah,  Universitas Tanjungpura,  Indonesia Evy Sulistianingsih,  Universitas Tanjungpura,  Indonesia Nurfitri Imro’ah,  Universitas Tanjungpura,  Indonesia

PDF 209-217

The Connection Between Jordan Derivations and Nilpotent Derivations on 2-Torsion-Free Semiprime Rings DOI : 10.37905/jjom.v8i2.37723 | Abstract views : 165 times Rahmah Mutiara Ayu Ningtiyas,  Universitas Lampung,  Indonesia Fitriani Fitriani,  Universitas Lampung,  Indonesia Ahmad Faisol,  Universitas Lampung,  Indonesia

PDF 218-226

Mathematical Modeling and Parameter Estimation of Meningitis Transmission Dynamic using Vaccination Strategies in Indonesia DOI : 10.37905/jjom.v8i2.39751 | Abstract views : 37 times Aufa Al Musyarof,  Institut Teknologi Sepuluh Nopember,  Indonesia Faris Nur Hibban,  Institut Teknologi Sepuluh Nopember,  Indonesia Mardlijah Mardlijah,  Institut Teknologi Sepuluh Nopember,  Indonesia Didik Khusnul Arif,  Institut Teknologi Sepuluh Nopember,  Indonesia

PDF 227-234

Joint Life Long-Term Care Insurance: A Semi-Markov Multi-State Model Integrating LTC Prevalence and Mortality Trends DOI : 10.37905/jjom.v8i2.39021 | Abstract views : 47 times Roro Anteng,  Universitas Gadjah Mada,  Indonesia Adhitya Ronnie Effendie,  Universitas Gadjah Mada,  Indonesia

PDF 235-241

Parameter Estimation of a Climate-Based Dengue Mathematical Model in Bandung City Using the Particle Swarm Optimization Algorithm DOI : 10.37905/jjom.v8i2.39153 | Abstract views : 55 times Sindi Meli Nur Afni,  Universitas Pendidikan Indonesia,  Indonesia Khusnul Novianingsih,  Universitas Pendidikan Indonesia,  Indonesia Ririn Sispiyati,  Universitas Pendidikan Indonesia,  Indonesia

PDF 242-256

Elegant Labeling of the Lotus Graph and Its Variations DOI : 10.37905/jjom.v8i2.39844 | Abstract views : 25 times Faliza Hanifatul Husna,  Universitas Negeri Malang,  Indonesia Desi Rahmadani,  Universitas Negeri Malang,  Indonesia

PDF 257-264

HIV Transmission Dynamics and Workforce Productivity in Indonesia: A Nonlinear Modeling and Parameter Estimation Study DOI : 10.37905/jjom.v8i2.39823 | Abstract views : 21 times Rizqi Aridh Dwi Prasetyo,  Institut Teknologi Sepuluh Nopember,  Indonesia Nuansa Cahaya Muhammad,  Institut Tekonologi Sepuluh Nopember,  Indonesia Didik Khusnul Arif,  Institut Teknologi Sepuluh Nopember,  Indonesia Mardlijah Mardlijah,  Institut Teknologi Sepuluh Nopember,  Indonesia

PDF 265-272

Latent Markov Modeling of HIV Vulnerability Transitions Among Adolescent Girls and Young Women in Zimbabwe DOI : 10.37905/jjom.v8i2.40071 | Abstract views : 0 times Fungai Hamilton Mudzengerere,  University of KwaZulu-Natal,  South Africa Oliver Bodhlyera,  University of KwaZulu-Natal,  South Africa Henry Mwambi,  University of KwaZulu-Natal,  South Africa

PDF 273-285