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A customized digital image correlation (DIC) system was implemented to monitor the strain produced in a cold-rolled AL-6XN stainless steel plate, 3.0 mm thick, subjected to quasi-static and cyclic loading tests. A comparison of the DIC strain measurements was made against those provided by conventional extensometers. Furthermore, the DIC system was used to monitor the fatigue crack initiation in low-cycle fatigue tests. The true stress–strain behavior for the AL-6XN material was properly captured by the DIC measurements. For low-cycle fatigue tests (strain control), the strain mapping generated by DIC allowed for identifying zones with higher strain than the nominal strain amplitude applied ( ε a ) since the first stages of the fatigue life (FL). These zones become potential fatigue crack initiation sites. [ABSTRACT FROM AUTHOR]

In this paper, we propose a Leslie–Gower predator–prey model in which the predator can only be captured when its population size exceeds a critical value; the mean growth rate of the prey in the absence of the predator is subject to a semi‐saturation rate that affects its birth curve, and the interaction between the two species is defined by a Holling II predation functional with alternative food for the predator. Since the proposed model is equivalent to a Filippov system, its mathematical analysis leads to a local study of the equilibria in each vector field corresponding to the proposed model, in addition to the study of the stability of its pseudo‐equilibria located on the curve separating the two vector fields. In particular, the model could have between one and three pseudo‐equilibria and at least one limit cycle surrounding one or two inner equilibria, locally unstable points. [ABSTRACT FROM AUTHOR]

Purpose: Traditional fermented beverages are a valuable cultural, economic, and social heritage of Latin American societies that deserve to be preserved and strengthened with sustainable development and respect for diversity. Therefore, this article will demonstrate, through scientific literature, the importance for indigenous societies and the nutritional contributions of the most traditional beverages of North and South America. Methods: This systematic review followed the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analysis) verification protocol. The study focused on exploring the nutritional information of South and Central American fermented beverages. The search was conducted in the Biomed, PubMed, ScienceDirect, Scopus, Scielo, and Google Scholar databases to identify publications published within the past 15 years. Results: However, the presence of toxic compounds such as biogenic amines and phenols that affect the quality of the product and human health has been detected. In addition, it was found that macro-and micronutrients, vitamins, and microorganisms differ according to the type of raw material used. It was concluded that corn is the most widely used raw material to produce fermented beverages in Latin America. At the same time, Mexico has conducted more research on this product, and most analyses are being carried out on the use of corn in the production of fermented beverages. In addition, several studies have shown that using validated and standardized methodologies to detect biogenic weapons is crucial to ensure accurate identification, effective response, and compliance with legal and security requirements in this critical area. [ABSTRACT FROM AUTHOR]

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Copyright of QhaliKay: Revista de Ciencias de la Salud is the property of QhaliKay Revista de Ciencias de la Salud and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)