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Contact Name
Jumanto
Contact Email
jumanto@mail.unnes.ac.id
Phone
+6281339762820
Journal Mail Official
shmpublisher@gmail.com
Editorial Address
Jl. Karanglo Raya No. 64, Pedurungan, Semarang, 50191, Indonesia
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Jawa tengah
INDONESIA
Journal of Soft Computing Exploration
Published by shm publisher
ISSN : 27467686     EISSN : 27460991     DOI : https://doi.org/10.52465/joscex
The journal focuses on publishing high-quality, original research and review articles in the field of Soft Computing, Informatics and Computer Science, emphasizing the development, application, and rigorous evaluation of Advanced Computational Methods, Artificial Intelligence (AI), Machine Learning (ML), and Data Science to address complex real-world challenges. The scope of the journal includes, but is not limited to, innovative research in the following areas: 1. Artificial Intelligence and Machine Learning Novel Algorithms and Architectures: Development and comparison of ML/DL models for classification and prediction (including Logistic Regression, Ridge Classifier, SVM, k-NN, and Random Forest). Ensemble Learning: Evaluation and optimization of ensemble methods Balanced Random Forest, SMOTE-RF, SMOTEBoost, and RUSBoost for robust prediction. Data Challenges and Preprocessing: Techniques for mitigating issues like class imbalance (using methods like SMOTE and GAN) and feature extraction/dimension reduction techniques (including Principal Component Analysis (PCA) and Local Binary Pattern (LBP)). 2. Deep Learning and Computer Vision Convolutional Neural Networks (CNNs): Research on CNN architectures (VGG16, ResNet50, DenseNet121, EfficientNet, and MobileNetV2) and the impact of optimization functions (Adam, SGD, NAdam) on model performance. Hybrid and Concatenated Architectures: Proposing and evaluating hybrid models (MobileNetV2 combined with LBP) or concatenated architectures (MobileNetV2 and DenseNet201) to improve classification and feature representation. Image Analysis Tasks: Advanced techniques for image classification (specifically Diabetic Retinopathy), image similarity detection (using Siamese Networks and Test-Time Augmentation), and multi-object segmentation (using FCN with Squeeze-and-Excitation and Attention Mechanisms for palm oil images). 3. Data Science and Advanced Analytics Pattern Detection and Data Mining: Performance evaluation of data mining algorithms, including Biclustering (Cheng & Church and Spectral Biclustering), specifically under challenging structural conditions like collinearity and overlap. Time Series Analysis and Forecasting: Application of advanced decomposition and clustering methods (Ensemble Empirical Mode Decomposition (EEMD) and Time Series Clustering with DTW/ARIMA) for accurate economic or temporal prediction. 4. Applied Informatics (Domain-Specific Applications) Health and Medical Informatics: Classification models for disease diagnosis (including Heart Attack Disease and Diabetic Retinopathy). Agricultural Informatics: Automated detection and classification of plant diseases from leaf/crop images (including Mango Leaf Disease and Chili Plant Disease) and Palm Oil Segmentation. Business and Economic Informatics: Predictive modeling for crucial business metrics (Customer Churn Prediction in Telecommunications) and economic forecasting (Rice Price Forecasting).
Articles 74 Documents
Graph-based text summarization using LexRank to uncover student perspectives on social media Sulfayanti F. Situju; Siti Aulia Rachmini; Nadia; Fitriyani Umar
Journal of Soft Computing Exploration Vol. 7 No. 4 (2026): December 2026
Publisher : SHM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52465/joscex.v7i4.161

Abstract

The large number of student comments challenged efficient manual analysis. This study addressed the problem by applying the LexRank algorithm to generate automatic summaries that captured the most important information. A summary of the student comment data was obtained through sentence segmentation, text preprocessing, TF-IDF weighting, cosine similarity calculation, graph construction, and sentence ranking using the LexRank algorithm. The summary results were evaluated using the ROUGE metric by comparing LexRank-generated summaries with those produced by generative AI. The test results showed that direct summarization of 500 comments simultaneously produced F1-scores of ROUGE-1 = 0.309, ROUGE-2 = 0.093, and ROUGE-L = 0.191. Additional experiments were conducted by dividing the data into five subsets, each containing 100 comments, and yielded the best F1-scores of ROUGE-1 = 0.351648, ROUGE-2 = 0.171429, and ROUGE-L = 0.274510. The data partitioning made LexRank more effective in selecting important sentences, thereby improving the quality of the summaries compared with summarizing the entire dataset at once. The ROUGE evaluation indicated that the generated summaries were reasonably accurate and informative.
Designing ambidextrous application architecture using TOGAF 10 to support AI-enabled learning for smartco’s digital transformation Raissa Eva Ramadhanty Sukmana; Rahmat Mulyana; Iqbal Yulizar Mukti
Journal of Soft Computing Exploration Vol. 7 No. 4 (2026): December 2026
Publisher : SHM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52465/joscex.v7i4.193

Abstract

As organizations advance digital transformation, learning and competency development can no longer rely on systems that operate in silos. In specific learning related functions, actions at SmartCo rely on various unconnected systems leading to challenges in how applications interact with each other, accessing competency data, and working across services as the organization needs to integrate artificial intelligence into its workforce development strategy. Although previous studies have explored Enterprise Architecture, Agile Enterprise Architecture, AI-enabled learning, and ambidextrous governance independently, no prior study has translated organizational ambidexterity into TOGAF Standard, 10th Edition-based application architecture artifacts for AI-enabled learning. This study aims to design an Ambidextrous Application Architecture using The Open Group Architecture Framework Standard 10th Edition to support AI-enabled learning within SmartCo’s digital transformation agenda. The design combined a Traditional Enterprise Architecture component to manage core enterprise applications with an Agile Enterprise Architecture component to accommodate rapid innovation in learning services. Building this architecture involved mapping organizational capabilities, modeling the application structure, and defining governance mechanisms that balance application stability with continuous innovation. The resulting architecture integrates core enterprise applications with AI-enabled learning services through a shared integration layer. The proposed architecture introduces integrated governance artifacts to operationalize organizational ambidexterity. This architecture gives SmartCo room to keep its core operations stable while moving forward with continuous innovation. Validation by SmartCo practitioners and Enterprise Architecture experts indicated implementation feasibility with evaluation scores of 4–5 across key assessment criteria.
Comparative analysis of proximal policy optimization and deep Q-network for HVAC energy–comfort control using IoT data Ikhsanudin; Kusnawi
Journal of Soft Computing Exploration Vol. 7 No. 4 (2026): December 2026
Publisher : SHM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52465/joscex.v7i4.235

Abstract

This study compared Proximal Policy Optimization (PPO) and Deep Q-Network (DQN) for heating, ventilation, and air-conditioning (HVAC) energy–comfort control using an Internet of Things (IoT)-informed simulation. A dataset comprising 2,027,520 observations of temperature, humidity, voltage, current, electrical power, and occupancy was aggregated into five-minute intervals. After preprocessing, 25,544 intervals from 90 calendar dates were retained; 72 dates were used for training and 18 for chronological testing. Both algorithms shared the same state representation, five discrete HVAC actions, reward formulation, and nominal training budget to enable a controlled comparison. PPO and DQN were trained using five independent random seeds across six scenarios, yielding 60 models. Under baseline conditions, PPO consumed 18.995 ± 0.320 kWh of simulated energy, compared with 19.505 ± 0.116 kWh for DQN. Mean comfort deviations were 0.239 ± 0.072 °C and 0.246 ± 0.069 °C, respectively. Paired Wilcoxon tests with Holm correction indicated a statistically significant PPO–DQN difference only in simulated energy. Reward-function and environmental-parameter sensitivity analyses showed that the relative ranking of comfort and return changed across configurations, whereas PPO consistently used less simulated energy. A fixed rule-based thermostat used the least simulated energy but exhibited greater comfort deviation. The findings were limited to the specified, uncalibrated simulator and did not establish measured HVAC energy savings or universal algorithm superiority.
Explainable machine learning for coffee shop location analysis in Surabaya: Random forest, XGBoost, and logistic regression under spatial cross-validation Ahmad Rafli; Muhammad Itqan Mazdadi; Andi Farmadi; Muliadi; Mohammad Reza Faisal
Journal of Soft Computing Exploration Vol. 7 No. 4 (2026): December 2026
Publisher : SHM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52465/joscex.v7i4.256

Abstract

Data-driven studies of coffee shop location are usually validated through random splits and interpreted through global importance rankings, leaving their accuracy estimates and explanations open to question. This study aims to compare tree-based ensembles with a linear baseline under spatially blocked validation, to quantify feature contributions, and to interpret the co-location structure of coffee shops in Surabaya, Indonesia. Across a hexagonal grid, 436 cells split evenly between presence and pseudo-absence were described by eleven OpenStreetMap-derived spatial features. Random Forest, XGBoost, and a logistic regression baseline were evaluated under nested cross-validation blocked by the 31 sub-districts, since the labels were significantly autocorrelated, with paired significance testing and bootstrap confidence intervals. The ensembles proved statistically equivalent, and neither surpassed the linear baseline in ranking ability, with areas under the receiver operating characteristic curve of 0.865, 0.862, and 0.867. They improved threshold-dependent metrics instead, raising the Matthews correlation coefficient from 0.493 to 0.562 and recall from 0.715 to 0.814. Hotel and competitor density led the permutation importance ranking, with no ablated configuration below 0.842. Shapley additive explanations exposed a saturating co-location structure in which competitor density contributed positively to presence, a pattern linear models cannot represent. Spatial blocking altered the metrics by less than 0.01, guarding against over-optimistic evaluation rather than driving these results, and the feature profiles give operators and municipal planners an instrument for screening candidate areas.