Autonomous University of Guerrero

This study presents an extensive mathematical framework for the stability analysis and validation of advanced control applications in continuous, nonlinear, hybrid, and Caputo–Fabrizio fractional-order systems. The proposed methodology integrates Lyapunov theory, Input-to-State Stability analysis, passivity, and small-gain techniques into a cohesive, generalizable criterion suitable for both linear and nonlinear dynamics. The method covers systems that are defined by Caputo–Fabrizio fractional derivatives and can handle uncertainty, disturbances, and mixed events. Validation is part of the stability analysis, which combines proof-based assurances with verification through simulation in real-world conditions. Scenario-based probabilistic analysis links the results of Monte Carlo tests to formal risk limitations. This makes it possible to verify that stability and contract compliance are both fully assured. Case studies featuring robotic manipulators, process control with model predictive control, and adaptive aeronautical systems demonstrate the methodology, achieving significant robustness margins and statistical performance assurance. This unified technique provides a theoretically robust and empirically substantiated pathway from controller synthesis to implementation.

This visual essay examines the colonia of San Isidro Labrador, located on the urban margins of Acapulco, Mexico-a territory shaped by Afro-descendant heritages and enduring conditions of socio-environmental marginalization. Drawing on an ethnographic and more-than-human approach, the article explores how urban space is co-produced through a hybrid geography in which nonhuman actors-such as the creek-operate simultaneously as sources of livelihood and as agents of risk and destruction, particularly after extreme events such as Hurricane Otis (October 2023). The essay shows how state abandonment and institutional precarity intensify persistent forms of territorial injustice, compelling residents to develop local strategies of care, repair, and resistance amid a prolonged crisis. Through situated observations of everyday practices, collective memories, and fragile materialities-homes built on unstable ground and improvised infrastructures-the piece offers a critical reading of unequal urbanization, recognizing the agency of the nonhuman and the political force of local ways of inhabiting, rebuilding, and repairing the territory. Este ensayo visual analiza la colonia San Isidro Labrador, ubicada en los m & aacute;rgenes urbanos de Acapulco, M & eacute;xico, un territorio atravesado por herencias afrodescendientes y por condiciones hist & oacute;ricas de profunda marginaci & oacute;n socioambiental. Desde un enfoque etnogr & aacute;fico y m & aacute;s-que-humano, el art & iacute;culo examina c & oacute;mo el espacio urbano se coproduce a trav & eacute;s de una geograf & iacute;a h & iacute;brida, en la que actores no humanos -como el arroyo- operan simult & aacute;neamente como fuentes de sustento y como agentes de riesgo y destrucci & oacute;n, especialmente tras eventos extremos como el hurac & aacute;n Otis (octubre de 2023). El texto muestra c & oacute;mo el abandono estatal y la precariedad institucional intensifican formas persistentes de injusticia territorial, obligando a la comunidad a desplegar estrategias locales de cuidado, reparaci & oacute;n y resistencia en un escenario de crisis prolongada. A partir de una observaci & oacute;n situada de pr & aacute;cticas cotidianas, memorias colectivas y materialidades fr & aacute;giles -viviendas asentadas sobre suelos inestables e infraestructuras improvisadas-, el ensayo propone una lectura cr & iacute;tica de la urbanizaci & oacute;n desigual que reconoce la agencia de lo no humano y la potencia pol & iacute;tica de las formas locales de habitar, reconstruir y reparar el territorio.

Systematic collection and analysis of antimicrobial resistance data from key bacterial pathogens is essential to contribute to control antimicrobial resistance (AMR). The aim of this work was to survey the drug resistance on clinically relevant organisms stratified according to age, gender, clinical specimens and facilities. Microbiological data were collected from 55 centers across 24 states in Mexico between January 1 and March 31, 2025. Bacterial identification and antimicrobial susceptibility testing were performed at each participating center using locally available methods. Data was processed using WHONET 2025. Isolates obtained from lower respiratory specimens, urine, blood, biopsies and abscesses were analyzed. Carbapenem non-susceptible isolates were further analyzed by PCR for common carbapenemase-encoding genes. Resistance frequencies were compared using the chi-square test. A total of 11,290 clinical isolates were analyzed, mostly from urine (n = 7,149; 63.3

Background/Objectives: Our aim is to describe the clinical, imaging, and histopathological features of odontogenic keratocyst in a Mexican cohort. Methods: This is a retrospective, descriptive, and cross-sectional study. Clinical records and histopathology reports (2015-2025) from multiple laboratories were reviewed. Slides stained with hematoxylin and eosin were evaluated by pathologists using standardized criteria. Descriptive statistics were performed. Results: A total of 106 cases were included. Ages ranged from 10 to 86 years (mean 33.4 ± 17.7). There was a predominance of males (61/106; 57.5%). The most frequent location was the posterior mandible (49/106; 46.2%), followed by anterior mandible (30/106; 28.3%), posterior maxilla (19/106; 17.9%), and anterior maxilla (8/106; 7.5%). Most cases were asymptomatic (73/106; 68.9%). Association with an impacted tooth was documented in 37/106 (34.9%) and root resorption in 26/106 (24.5%). Satellite epithelial islands were observed in 8/106 (7.5%), satellite cysts in 17/106 (16.0%), and both findings in 4/106 (3.8%). Chronic inflammation was present in 62/106 (58.5%). Conclusions: In this Mexican series, odontogenic keratocyst predominated in males and, in the posterior mandible, was frequently asymptomatic, and showed satellite foci and chronic inflammation in a relevant proportion, reinforcing the need for clinical-imaging and histopathological correlation, as well as follow-up.