Computational and Applied Statistics (CAS 2023) -- Oversampling Methods for Handling Imbalance Data in Binary Classification -- Team Member Satisfaction, Teamwork Management, And Task Conflict: A Multilevel Mode -- Impact of Organizational Factors on Accident Prediction in the Retail Sector -- SAGA Application for Generalized Estimating Equations Analysis -- Performance evaluation of portfolio stocks selected with the EU-EV risk mode -- Computational Procedures for Improving Extreme Value Estimation in Time Series Modelling -- Sleep Disorders in Portugal Based on Questionnaire -- The Multiscale Maximum Change Algorithm for Subsurface Characterization -- Anonymized Data Assessment via Analysis of Variance: an Application to Higher Education Evaluation -- Cyber Intelligence and Applications (CIA 2023) -- Mitigating User Exposure to Dark Patterns in Cookie Banners through Automated Consent -- Secure Mobile Ad hoc Routing Using Confrontations (SMARUC) and Nodes Communication with CCM (Character Classification Model) - OKE (Optimal Key Exchange) - SSL (Secure Socket Layer) Model -- An association rules-based approach for Anomaly Detection on CAN-bus -- Recurrence Plots-based Network Attack Classification using CNN-Autoencoders -- Conversations South-North on climate change adaptation towards smarter and more sustainable cities (CLAPS 2023) -- Comparison of environmental benefits of warm or cold mix asphalt and its application in pavement layers -- A Theoretical Framework for Climate Change Adaptation Participatory Planning in Vulnerable Coastal Zones -- Legal protection issues for sustainable waterfront development: The Athenian Riviera, Greece -- Computational Mathematics, Statistics and Information Management (CMSIM 2023) -- Black Scabbardfish species distribution: Geostatistical Inference under Preferential Sampling -- Zika: a case study -- Mathematical Analysis ofAutonomous and Nonautonomous Hepatitis B Virus Transmission Models -- Modelling the Fuel Consumption of a NRP Ship Using a Kalman Filter Approach -- A Portuguese Case Study About Barotrauma -- A study on the maintenance of distributed lag model in time series prediction model -- The Possible Equivalent Value Set for Incomplete Data Set -- Computational Optimization and Applications (COA 2023) -- An Exact Optimization Approach for Personnel Scheduling Problems in the Call Center Industry -- A bi-objective optimization approach for wildfire detection -- Resource Dispatch Optimization for Firefighting Based on Genetic Algorithm -- OR in Hospital Admission Systems: an overview of the 20th century -- Comparison of Hybrid Direct-Search Approaches For Beam Angle Optimization in Intensity-Modulated Proton Therapy -- A Hybrid Genetic Algorithm for Optimal Active Power Curtailment Considering Renewable Energy Generation -- Multi-objective optimization of the job shop scheduling problem on unrelated parallel machines with sequence-dependent setup times -- Radial Basis Function and Bayesian Methods for the Hyperparameter Optimization of Classification Random Forests -- Workshop on Computational Science and HPC (CSHPC 2023) -- Optimization of multiple-precision LU decomposition using Ozaki scheme -- Cities, Technologies and Planning (CTP 2023) -- Project Smart SDI: Concept for improving NSDI for sustainable development in Serbia -- Project Smart SDI: Concept for improving NSDI for sustainable development in Serbia -- Comparative study for the investigation of safe movement with the method of Space Syntax: The case of Mati, Eastern Attica -- Building Collaboration for a Smart and Green Region-al Ecosystem: Insights from the Slovak Republic -- Typographic topology/Topographic typography. Reading the urban identity through the historical typescape: hypothesis for an AR situated mobileapp -- Spatial tools and ppWebGIS platforms for Sustainable Urban Development and Climate Change adaptation. Participatory planning in urban areas with special conditions -- Citizen E-participation: The Experience of LABMET in the Metropolitan City of Cagliari -- EU Mission on Climate-Neutral and Smart Cities Assessing Readiness to Join of 12 Greek Cities -- Application and evaluation of a cross-fertilization methodology in the AEC industry: new technologies, digitalization and robotization -- Computational Astrochemistry (CompAstro 2023) -- Fragmentation dynamics of astrochemical molecules induced by UV and EUV photons -- Computational Investigation of the N(2D)+ C2H4 and N(2D)+ CH2CHCN Reactions: Benchmark Analysis and Implications for Titan's Atmosphere -- A Computational Study of the Reaction between N(2D) and Simple Aromatic Hydrocarbons.

This nine-volume set LNCS 14104 - 14112 constitutes the refereed workshop proceedings of the 23rd International Conference on Computational Science and Its Applications, ICCSA 2023, held at Athens, Greece, during July 3-6, 2023. The 350 full papers and 29 short papers and 2 PHD showcase papers included in this volume were carefully reviewed and selected from a total of 876 submissions. These nine-volumes includes the proceedings of the following workshops: Advances in Artificial Intelligence Learning Technologies: Blended Learning, STEM, Computational Thinking and Coding (AAILT 2023); Advanced Processes of Mathematics and Computing Models in Complex Computational Systems (ACMC 2023); Artificial Intelligence supported Medical data examination (AIM 2023); Advanced and Innovative web Apps (AIWA 2023); Assessing Urban Sustainability (ASUS 2023); Advanced Data Science Techniques with applications in Industry and Environmental Sustainability (ATELIERS 2023); Advances in Web Based Learning (AWBL 2023); Blockchain and Distributed Ledgers: Technologies and Applications (BDLTA 2023); Bio and Neuro inspired Computing and Applications (BIONCA 2023); Choices and Actions for Human Scale Cities: Decision Support Systems (CAHSC-DSS 2023); and Computational and Applied Mathematics (CAM 2023).