Universidad de Lima

Well-posedness and polynomial decay for Rao–Nakra sandwich beam with memory and Kelvin–Voigt damping

Abstract In this paper, we investigate the well-posedness and long-term behavior of a Rao–Nakra sandwich beam model with two different damping mechanisms. The top layer is subjected to memory-type damping, described by a relaxation kernel that satisfies standard positivity and de...

Synthesis, DFT studies, and molecular docking of novel pyrazole semicarbazones targeting GPb, PPA-II, and DPP-4 enzymes

Abstract Six new phenyl-1 H -pyrazole-carbaldehyde semicarbazone derivatives ( 1 – 6 ) have been synthesized and characterized by FT-IR, NMR ( 1 H and 13 C), and mass spectrometry. NMR analysis indicated that these compounds in DMSO-d 6 exhibit a cisE isomeric form. This evidence...

Personal, Normative, and Access-Related Correlates of Fruit and Vegetable Purchase Intention in Peruvian Adults

Background/Objectives: Fruit and vegetable purchase intention may reflect personal, normative, and access-related factors, yet evidence from Peru remains limited. This study aimed to examine associations of health consciousness, family influence, perceived behavioral control, and...

Neonatal Oculomotor, Optomotor, Vestibulo-ocular, Protective Blink, and Pupillary Light Reflexes Following Perinatal Brain Trauma: Implications for Early Visual Rehabilitation in Mild Traumatic Brain Injury and Concussion

Perinatal brain trauma, including hypoxic-ischemic encephalopathy and mechanical injury during pregnancy, labor, or delivery, represents an early-acquired brain injury that disrupts the identical subcortical, brainstem, cerebellar, and emerging cortical visual, oculomotor, and ve...

The Challenge of Meaningful Comparison: Assessing the Relation Between Social Comparison Orientation and Meaning in Life

Social comparison processes play a central role in social cognition, but their relation to meaning in life remains unclear. We conducted an integrative analysis of three online studies with American, Indian, Peruvian, and French participants. After harmonizing the study-specific...

From Structural Inequalities to Labor Precarity: Adoption of Digital and AI Tools in Latin American Journalism

While inequalities in technological access and use have been widely documented, few studies have examined their link to labor precarity and social inequality in journalism in the Global South. This article analyzes this relationship through a multilevel study of Worlds of Journal...

The Concentration-Fragility Nexus: Early-Warning Systems and Portfolio Implications in Concentrated Markets

<ns5:p>Background The post-pandemic financial landscape presents a paradox: record asset price highs coexist with mounting systemic vulnerabilities. Market concentration in equity indices has reached levels comparable to the dot-com era, driven by passive investment inflows and t...