Rocío del Campo-Pedrosa1, Diego del Campo-Pedrosa1, Bettina Merlin2 and Ana González-Marcos1, 1Department of Mechanical Engineering, Universidad de La Rioja, Logroño, La Rioja, Spain, 2Fakultät International Business, Hochschule Heilbronn, Heilbronn, Germany
Traditional sensory analysis in food innovation provides limited insight into consumer behavior, whereas social platforms such as Reddit offer large-scale, real-time textual data on food-related practices and perceptions. This study evaluates Reddit as a scalable source for detecting food trends and healthy eating patterns in Spanish-language discussions using artificial intelligence (AI) and natural language processing (NLP). An end-to-end pipeline was implemented, including targeted data scraping across seven food-related domains, Spanish-language filtering (≥70% confidence), customized preprocessing, and unsupervised topic discovery via k-means clustering. The system processed 17,774 Spanish-language posts from an initial corpus of 92,949 entries. Despite linguistic challenges such as polysemy and lemmatization errors, the method produced coherent and representative themes, including barriers to home cooking, weight management concerns, economic factors, food categories, and nutrition-related consultations. These results demonstrate the effectiveness of unsupervised NLP techniques for large-scale monitoring of food-related discourse on social media.
Natural Language Processing, Unsupervised Learning, Social Media Mining, Artificial Intelligence.
Bettina Merlin and Ana González-Marcos, Department of Computer Science, College of Computer, Qassim University, Buraydah, 51452, Saudi Arabia
As automated optical character recognition (OCR) and deep learning-based solvers achieve near-human accuracy in breaking conventional CAPTCHAs, there is a critical need for security mechanisms that exploit the inherent limitations of machine perception. This paper proposes a novel methodological framework for "Calligraphic Obfuscation," a security-by-design approach that leverages the structural complexity and fluid entropy of traditional Arabic calligraphic styles. Unlike standard text-based challenges, our approach introduces a multi-phase generation pipeline that systematically maps linguistic strings into high-complexity visual domains. The methodology integrates a four-tier classification of calligraphic fonts—ranging from high-legibility styles like Naskh to high-entropy scripts such as Shakstah—and augments them with an adversarial layer utilizing Jacobian-based Saliency Map Attacks (JSMA). By formalizing the transition from cloud-centric generation to resource-efficient on-device architectures, this study provides a repeatable blueprint for developing robust, human-interactive proofs. The proposed framework offers a dual-benefit: significantly increasing the computational cost for adversarial machine learning models while maintaining a sustainable cognitive load for human users. This work lays the foundation for a new generation of linguistically-diverse and adversarially-hardened authentication challenges tailored for modern, resource-constrained mobile environments.
Calligraphic Obfuscation, CAPTCHA Security, Adversarial Machine Learning, Arabic Script Complexity, Human-Interactive Proofs, JSMA.
Allison Hensgen, Independent Researcher, USA
This report presents an empirical validation of the Δ.72 field equation within a real-world physiological dataset measuring stress responses in students during examination periods. The Δ.72 model posits that coherence within biological systems arises from dynamic alignment between internal variability, environmental fields, and phase-synchronized information flow. Using the publicly available Wearable Exam Stress dataset, this study tests whether measurable alignment (A), phase coherence (λ), and emergent output (E) follow the theoretical relationships predicted by the Δ.72 equation. Results show statistically significant coupling between field alignment and emergent coherence, supporting the model’s claim that adaptive, not rigid, synchrony underlies systemic health.
