Vol 20 No 2 (2026): BAREKENG: Journal of Mathematics and Its Application | BAREKENG: Jurnal Ilmu Matematika dan Terapan

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The June 2026 issue (Volume 20, Issue 2) of BAREKENG: Journal of Mathematics and Its Applications, comprising 60 peer-reviewed articles and 1 article retraction, showcases contributions from 241 authors, including 122 male and 119 female researchers. Altogether, the authors contributing to this issue are based in 9 countries. Of these, 216 are affiliated with Indonesian institutions, while 25 are international scholars from 8 countries, namely India, Iran, Malaysia, Nigeria, Oman, Saudi Arabia, Philippine, United Kingdom. In total, the contributors represent 56 domestic affiliations and 19 international affiliations, reflecting both a robust national base and an expanding global presence. We extend our sincere gratitude to the 203 reviewers from 12 countries: Indonesia, Cambodia, China, Estonia, India, Iraq, Italy, Japan, Malaysia, France, Nigeria, United Kingdom; who have dedicated their time, shared their expertise, and provided constructive feedback throughout the review process for these 60 articles. This June 2026 issue has been available online since January 2026. Volume 20 of the journal is published quarterly, with issues scheduled for March, June, September, and December. The authors contributing to this issue are affiliated with institutions from the following 9 countries.
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DOI: https://doi.org/10.30598/barekengvol20iss2year2026

Published: 2026-01-26

Articles

SEGMENTING MATERNAL AND CHILD HEALTH DEGREE IN INDONESIA USING SEM-PLS POS

Nurhanifa Nurhanifa, Hendra Perdana, Neva Satyahadewi

0897-0912
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COMPARISON OF FIRST-TO-DIE AND LAST-SURVIVOR JOINT LIFE INSURANCE UNDER COMMON SHOCK

Neva Satyahadewi, Louis Putra Jaya, Hendri Kurniawan, Yuyun Eka Pratiwi

0913–0926
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MARKETING GAMES AND SENSITIVITY ANALYSIS FOR ANY NUMBER OF COMPANIES

Almira Amir, Ruth Mayasari Simanjuntak, Yenny Suzana, Riri Syafitri Lubis, Fatmah Syarah, Fajriana Fajriana, Zahedi Zahedi

0927–0940
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FIXED POINT THEOREMS FOR MULTIVALUED MAPPINGS IN MODULAR B-METRIC SPACES

Hartono Hartono, Lusi Harini, Afifah Hayati, Syamsudin Mas'ud, Thesa Adi Saputra Yusri, Karyati Karyati, Fitriana Yuli Saptaningtyas

0941–0954
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FORECASTING THE INFLATION RATE IN INDONESIA USING ARIMA-GARCH MODEL

Toha Saifudin, Suliyanto Suliyanto, Fitriana Nur Afifa, Aini Divayanti Arrofah, Doni Muhammad Fauzi, Fachriza Yosa Pratama, Isryad Yoga Adyatma

0955-0970
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SOME CHEMICAL TOPOLOGICAL INDICES FOR THE COPRIME GRAPH OF THE INTEGERS MODULO GROUP

Gustina Elfiyanti, Mutia Nofita Sari, I Gede Adhitya Wisnu Wardhana, Ade Candra, Ghazali Semil Ismail

0971–0980
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HETEROGENEOUS GRAPH NEURAL NETWORKS FOR STOCK PRICE PREDICTION: MODELING TEMPORAL AND CROSS-STOCK DEPENDENCIES

Hilmi Aziz Bukhori, Elayaraja Aruchunan, Syaiful Anam, Saiful Bukhori, Avin Maulana

0981–1000
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WHOLE LIFE INSURANCE UTILIZING THE COMMISSIONERS METHOD AND THE VASICEK INTEREST RATE MODEL FOR PREMIUM RESERVE ANALYSIS

Krishna Prafidya Romantica, Arsyelina Husni Johan, Anuraga Jayanegara, Jason Filbert Leo

1001–1018
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OPTIMIZING LANDSLIDE SUSCEPTIBILITY MAPPING IN CENTRAL SULAWESI WITH RECURSIVE FEATURE ELIMINATION AND RANDOM FOREST ALGORITHM

Indra Rivaldi Siregar, Anik Djuraidah, Agus Mohamad Soleh

1019–1034
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OPTIMAL CRYPTOCURRENCY PORTFOLIO CONSTRUCTION USING GARCH-BASED MONTE CARLO SIMULATION

Staenly Staenly, Maria Yus Trinity Irsan, Josep Ginting

1035-1046
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REVEALING THE STICKY FLOOR EFFECT OF THE GENDER WAGE GAP IN INDONESIA BY USING AN UNCONDITIONAL QUANTILE REGRESSION WITH RIF-OLS APPROACH

Aisyah ‘Azizah Nur Rahmah, Wahyuni Andriana Sofa

1047–1060
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MATHEMATICAL ANALYSIS OF QC-MDPC STRUCTURES IN BIKE V5.2 POST-QUANTUM KEY ENCAPSULATION SCHEME

Rosa Rosa, Sa'aadah Sajjana Carita, Nadia Paramita Retno Adiati, Sri Rosdiana

1061–1076
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APPLICATION OF UNCERTAIN MAX PLUS LINEAR FOR SHIP SCHEDULE SAFETY ANALYSIS: A CASE STUDY OF KM. LAMBELU

Nurul Fuady Adhalia H, Mardhiyyah Rafrin, Aditya Putra Pratama, Rifaldy Atlant Tungga, Bayu Bayu, Syahrul Ramadhan Tahir

1077–1088
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DESIGN OPTIMIZATION OF GAS TRANSMISSION SYSTEM WITH DIFFERENTIAL EVOLUTION ALGORITHM

Ahmad Afdhal, Tasmi Tasmi, Ariana Yunita, Rangga Ganzar Noegraha

1089–1098
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A MODIFIED GEOGRAPHICALLY AND TEMPORALLY WEIGHTED REGRESSION MODELING ON OPEN UNEMPLOYMENT RATE IN SOUTH SULAWESI

Siswanto Siswanto, Nurtiti Sunusi, Andi Isna Yunita, Muhammad Ridzky Davala, Andi M. Alfin Baso, Nurfadilah Nurfadilah

1099–1110
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MIXED-EFFECTS MODELS WITH GENERALIZED RANDOM FOREST: IMPROVED FOOD INSECURITY ANALYSIS

Herlin Fransiska, Agus Mohamad Soleh, Khairil Anwar Notodiputro, Erfiani Erfiani

1111–1124
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TRADITIONAL LOGISTIC REGRESSION AND MACHINE LEARNING APPROACHES OF SOCIODEMOGRAPHIC AND ANTHROPOMETRIC FACTORS INFLUENCING HYPERTENSION IN ATHLETES

A'yunin Sofro, Asri Maharani, Mutia Eva Mustafidah, Khusnia Nurul Khikmah, Affiati Oktaviarina, Danang Ariyanto

1125–1138
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HYBRID VECTOR AUTOREGRESSIVE AND LONG SHORT TERM MEMORY MODEL FOR PREDICTING ECONOMIC GROWTH INDICATORS IN INDONESIA: A COMPARISON OF ADAM, NADAM, AND RMSPROP OPTIMIZATION METHODS

Ariska Fitriyana Ningrum, Mulil Khaira

1139–1154
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THE METRIC DIMENSION OF CYCLE BOOK GRAPHS B_(C_(m,n) ) FORMED BY A COMMON PATH P_2

Jaya Santoso, Darmaji Darmaji, Ana Muliyana, Asido Saragih

1155–1166
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GENERALIZED NESTED COPULA REGRESSION TO UNVEIL THE IMPACT OF EXCHANGE RATES AND NIKKEI 225 ON BANK MANDIRI STOCK PRICE

Alfi Khairiati, Retno Budiarti, Mohamad Khoirun Najib

1167–1184
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SPATIAL INTERPOLATION OF RAINFALL DATA USING COKRIGING AND RECURRENT NEURAL NETWORKS FOR HYDROLOGICAL APPLICATIONS IN SURABAYA, INDONESIA

Danang Ariyanto, A'yunin Sofro, Riskyana Dewi I Puspitasari, Riska Wahyu Romadhonia, Hernando Ombao

1185–1198
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TREE-BASED MIXED EFFECTS MODELING OF TEACHER CERTIFICATION OUTCOMES IN MADRASAH ALIYAH: A COMPARATIVE STUDY OF GLMM TREES AND GMET

Dodi Irawan Syarip, Khairil Anwar Notodiputro, Bagus Sartono

1199–1214
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DYNAMIC MODELING OF CARBON DIOXIDE EMISSIONS USING HIGH-ORDER DIFFERENTIAL EQUATIONS AND NONLINEAR ESTIMATION

Udjianna Sekteria Pasaribu, Adilan Widyawan Mahdiyasa, Asrul Irfanullah

1215–1228
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ENHANCED GIANT TREVALLY OPTIMIZER FOR ENGINEERING DESIGN AND EPIDEMIOLOGICAL MODEL

Ikhsan Rizqi Az-Zukruf As-Shidiq, E. Andry Dwi Kurniawan, Kuntjoro Adji Sidarto

1229–1250
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USE OF GLUE VALUE AT RISK FOR OPTIMAL PORTFOLIO RISK MEASUREMENT WITH THE SINGLE INDEX MODEL METHOD

Turnika Afdatul Rafni, Dina Agustina

1251–1262
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A NOVEL APPROACH TO SYMBOLIC DATA CLUSTERING USING ENHANCED K-MEANS ALGORITHM

Husty Serviana Husain, Sapto Wahyu Indratno, Sandy Vantika

1263–1282
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PRELIMINARY MATHEMATICAL MODEL FOR CANCER TREATMENT USING BORON NEUTRON CANCER THERAPY (BNCT)

Suryasatriya Trihandaru, Hanna Arini Parhusip, Yohannes Sardjono, Isman Mulyadi Triatmoko, Gede Sutresna Wijaya, Jane Labadin

1283–1300
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OPTIMAL STRATEGIES FOR DENGUE CONTROL: WOLBACHIA-INFECTED MOSQUITOES DEPLOYMENT, PUBLIC HEALTH EDUCATION, AND VACCINATION

Toni Bakhtiar, Jaharuddin Jaharuddin, Farida Hanum

1301–1316
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DESIGN AND IMPLEMENTATION OF ANFIS CONTROLLERS FOR STABILIZING FINANCIAL SYSTEMS: A COMPARATIVE STUDY WITH NONLINEAR FEEDBACK CONTROL

Lintang Patria, Seyed Mohamad Hamidzadeh, Mohamad Afendee Mohamed

1317–1330
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A SARIMA APPROACH WITH PARAMETER OPTIMIZATION FOR ENHANCING FORECAST ACCURACY FOR NATIVE CHICKEN EGG PRODUCTION

Rendra Gustriansyah, Deshinta Arrova Dewi, Shinta Puspasari, Ahmad Sanmorino

1331–1344
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COMPARISON OF FRUIT FLY OPTIMIZATION ALGORITHM (FOA) AND PARTICLE SWARM OPTIMIZATION (PSO) FOR SUPPORT VECTOR REGRESSION (SVR) IN UNITED TRACTORS STOCK PRICES FORECASTING

Belva Hadaya Wibowo, Iut Tri Utami, Masithoh Yessi Rochayani

1345–1358
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DEVELOPMENT OF A MATHEMATICAL MODEL FOR SMARTPHONE ADDICTION USING A DETERMINISTIC COMPARTMENTAL APPROACH

Amalina Amalina, Nor Azah Samat, Ahmad Sabri

1359–1372
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EVALUATING THE EFFECTIVENESS OF KERNEL EXTREME LEARNING MACHINES OVER CONVENTIONAL ELM FOR AIR QUALITY INDEX PREDICTION

Meta Kallista, Ignatius Prasetya Dwi Wibawa, Sultan Chisson Obie

1373–1388
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A COMPARATIVE EVALUATION OF SARIMA AND FUZZY TIME SERIES CHEN MODELS FOR RAINFALL FORECASTING IN MAKASSAR

Gavrilla Claudia, Atika Ratna Dewi, Aina Latifa Riyana Putri

1389–1404
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OPTIMIZATION OF ARIMA RESIDUALS USING LSTM IN STOCK PRICE PREDICTION OF PT MEDCO ENERGI INTERNASIONAL TBK

Achmad Fachril Yusuf Ababil, Abdulloh Hamid, Hani Khaulasari, Dian Candra Rini Novitasari, Wika Dianita Utami

1405–1420
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AN INVESTOR’S OPTIMAL PLAN IN A DC SCHEME WITH REFUND OF CONTRIBUTIONS FOR MORTGAGE HOUSING SCHEME

Edikan Edem Akpanibah, Sylvanus Kupongoh Samaila, Ase Matthias Esabai

1421–1436
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ENHANCING CERVICAL CANCER IMAGES QUALITY: HYBRID SMO-PMD FILTER FOR NOISE REDUCTION

Ach Khozaimi, Isnani Darti, Syaiful Anam, Wuryansari Muharini Kusumawinahyu

1437–1452
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A GENETIC ALGORITHM–PARTICLE SWARM OPTIMIZATION OPTIMIZED DOFCM APPROACH TO ENHANCE CLUSTERING AND OUTLIER DETECTION

Sintia Afriyani, Rohmatul Fajriyah

1453–1472
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IMPLEMENTATION OF KALMAN FILTER, RECURRENT NEURAL NETWORK, AND DECISION TREE METHOD TO FORECAST HIV CASES IN EAST JAVA

Nurwijayanti Nurwijayanti, Firman Yudianto, Panca Radono, Rizky Amalia Sinulungga, Mochammad Romli Arief, Rahayu Budi Utami, Hamzah Arof

1473–1484
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SPATIAL EXTRAPOLATION OF MALARIA CASES IN CENTRAL PAPUA USING CO-KRIGING BASED ON RAINFALL AND OBSERVATIONAL DATA FROM PAPUA PROVINCE

Toha Saifudin, Nur Chamidah, Azizah Atsariyyah Zhafira, Gabriella Agnes Budijono, Rivaldi Sihite, Mochamad Baihaqi, R. Arya Januarta

1485–1500
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APPLICATION OF DISCRETE HIDDEN MARKOV MODELS IN ANALYZING BLOOD TYPE INHERITANCE PATTERNS

Nahrul Hayati, Eko Sulistyono, Andini Setyo Anggraeni

1501–1512
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RESIDUAL-BASED MEWMA CONTROL CHART FOR DRINKING WATER QUALITY MONITORING AT PDAM TIRTA

Agung Muhammad Takdir, Erna Tri Herdiani, Nurtiti Sunusi

1513–1526
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SURVIVAL ANALYSIS OF CHRONIC KIDNEY FAILURE PATIENTS USING THE COX STRATIFIED MODEL AND RANDOM SURVIVAL FOREST

Assyifa Lala Pratiwi Hamid, Budi Susetyo, Anang Kurnia

1527–1540
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COMPARISON OF MARS AND BINARY LOGISTIC REGRESSION MODELS FOR IDENTIFYING STUNTING RISK FACTORS IN TODDLERS IN TELUK WARU, EAST SERAM REGENCY

Johan Bruiyf Bension, Ferry Kondo Lembang, Nurul Fadillah Idris, Norisca Lewaherilla

1541–1556
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WAVELET-BASED COMPUTATIONAL FRAMEWORK FOR THE SOLOW-SWAN ECONOMIC MODEL

Jay Kishore Sahani, Pankaj Sharma, Nikhil Khanna, Ajay Kumar

1557–1568
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MATHEMATICAL MODEL FOR DETECTING DIABETES IN BLOOD CELLS WITH THE INFLUENCE OF CORTISOL

Imam Sujarwo, Juhari Juhari, Adelia Irma Feby Ariyanti, Sutrisno Sutrisno

1569–1582
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FUZZY LOGIC APPROACH TO FOREST FIRE RISK ASSESSMENT IN TANJUNG PUTTING NATIONAL PARK

Rani Natalia Purba, Esther Sorta Mauli Nababan, Prana Ugiana Gio, Zahedi Zahedi, Muhammad Romi Syahputra

1583-1598
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ENHANCING FUZZY TIME SERIES FORECASTING WITH REVISED HEURISTIC KNOWLEDGE: A CASE STUDY ON TUBERCULOSIS IN SABAH

Suriana Lasaraiya, Suzelawati Zenian, Risman Mat Hasim, Azmirul Ashaari

1599–1612
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MATHEMATICAL MODELING OF VARICELLA TRANSMISSION USING SVEITR MODEL

Sadiyana Yaqutna Naqiya, Vina Lusiana, Achmad Abdurrazzaq

1613–1626
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MODELLING THE NUMBER OF CRIMES IN EAST JAVA USING A TRUNCATED SPLINE SEMIPARAMETRIC REGRESSION APPROACH

Yahya Vigo Tri Saputra, Moh. Hafiyusholeh, Hani Khaulasari, Yuniar Farida, Putroue Keumala Intan

1627–1642
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STATISTICAL MODELING FOR DOWNSCALING USING PRINCIPAL COMPONENT REGRESSION AND DUMMY VARIABLES: A CASE OF SIAK DISTRICT

Arisman Adnan, Elsa Riesta Alika, Divo Dharma Silalahi, Felia Rizki Aulia, Gustriza Erda

1643–1658
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SOIL MOISTURE PREDICTION USING LSTM AND GRU: UNIVARIATE AND MULTIVARIATE DEEP LEARNING APPROACHES

Jemsri Stenli Batlajery, Agus Buono, Mushthofa -Mushthofa

1659–1674
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A COMPARATIVE STUDY OF PIPELINE-VALIDATED MACHINE LEARNING CLASSIFIERS FOR PERMISSION-BASED ANDROID MALWARE DETECTION

Arif Ridho Lubis, Dewi Wulandari, Lilis Tiara Adha, Tika Ariyani, Yuyun Lase, Fahdi Saidi Lubis

1675–1692
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APPLICATION OF THE RANDOM FOREST ALGORITHM FOR ESTIMATING CONDITIONAL VALUE AT RISK (CVAR) ON THE STOCK PORTFOLIO OF INSURANCE COMPANIES IN INDONESIA

Purwanto Purwanto, Agna Olivia

1693–1708
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ANALYSIS OF MULTILINGUAL OPINION POLARIZATION WITH CROSS-LINGUAL LANGUAGE MODEL-ROBUSTLY OPTIMIZED BIDIRECTIONAL ENCODER REPRESENTATIONS FROM TRANSFORMERS APPROACH (XLM-ROBERTA)

Ghaitsa Shafa Cinta Kananta, Dewi Retno Sari Saputro, Sutanto Sutanto

1709–1718
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HYBRID INTEGRATION OF BERT AND BILSTM MODELS FOR SENTIMENT ANALYSIS

Nicolas Ray Amarco Tambunan, Dewi Retno Sari Saputro, Purnami Widyaningsih

1719–1730
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SMARTPHONE PURCHASING DECISION MAKING USING AN INTERVAL-VALUED INTUITIONISTIC FUZZY AHP APPROACH: A CASE STUDY IN MALANG CITY

Noor Hidayat, Vira Hari Krisnawati, Sobri Abusini, Desfi Rahmatul Khairi

1731–1742
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COMPARISON OF LINEAR REGRESSION AND ARTIFICIAL NEURAL NETWORK MODELS FOR PREDICTING FISH CATCH VOLUME IN URENG VILLAGE, CENTRAL MALUKU

Kasriana Kasriana, Rasid Ode, Eryka Lukman, Agung K. Henaulu

1743–1756
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HYBRID SES-LSTM RECURRENT NEURAL NETWORK MODEL FOR TIME SERIES FORECASTING OF ELECTRICITY EXPENDITURE IN A UNIVERSITY

Jasten Keneth De las Nadas Treceñe, Reynalyn O. Barbosa

1757–1774
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QUANTILE BASED PLS-SEM WITH WILD BOOTSTRAP

Abdul Malik Balami, Bambang Widjanarko Otok, Santi Wulan Purnami

1775–1790
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RETRACTION NOTICE TO “PID PATH FOLLOWING CONTROL SYSTEM DESIGN ON UNMANNED AUTONOMOUS FORKLIFT PROTOTYPE” [BAREKENG: J. Math. & App., vol. 18(4), pp. 2093-2112, Dec. 2024]

Teguh Herlambang, Hendro Nurhadi, Katherin Indriawati, Reza Maliki Akbar

1791
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