Asymptotic estimates for a nonlinear wave problem

We study the asymptotic solutions for a nonlinear damped wave problem showing the existence and uniqueness of solutions by contractionWe study the asymptotic solutions for a nonlinear damped wave problem showing the existence and uniqueness of solutions by contractio

Nivel de aplicación del principio precautorio ambiental en el Ministerio Público Peruano - 2017

Es conocido en el mundo jurídico y no jurídico, que la Conferencia de las Naciones Unidas sobre el Medio Ambiente y el Desarrollo consagró en su “Declaración de Río" el "principio o enfoque precautorio", el mismo que impone que ante una eventual actividad humana con posibles impactos negativos en el medio ambiente, se tiene que asumir la decisión política de su no realización o concreción. La aplicación del principio se basa exclusivamente en indicios del posible daño sin necesidad de requerir la certeza científica absoluta al respecto. El objetivo general en la investigación fue determinar cuál fue el nivel de aplicación del Principio Precautorio Ambiental en el Ministerio Público peruano durante el año 2017 (nivel de aplicación ausente, mínimo, promedio, alto o muy alto). Se trazó asimismo como hipótesis, que nivel de aplicación del Principio Precautorio fue mínimo o casi ausente en el Ministerio Público peruano, en la carga fiscal que soportó en materia ambiental en dicho año. Los resultados han concretado nuestros objetivos, y han confirmado la hipótesis formulada, ya que de manera general se ha obtenido como resultado, mediante una encuesta-cuestionario, que un porcentaje considerable, el 58.3% de fiscales peruanos, señalan que la aplicación del principio precautorio ambiental fue mínimo durante el 2017, en tanto que 41.6% señalaron que su aplicación fue ausente, es decir que no se aplicó durante el año 2017, en las 38 Fiscalías Especializadas en Materia Ambiental (FEMAs) del Ministerio Público peruano (haciendo un total de 100% entre ambos resultados). Los resultados de la investigación podrían permitir al Estado peruano adoptar las decisiones que se requieran para enfrentar o regular los fenómenos económico-ambientales con relevancia jurídica que se vienen produciendo en el Perú

Sobolev Spaces Wm,p(W) with 1 p +¥

En este artículo hacemos una breve revisión de los espacios de Sobolev, para lo cual presentamos su estructura vectorial ligada a los espacios Lp. Además, Se muestran que dichos espacios son normados, de Banach, separables y algunos son reflexivos (i,e; es isomorfo a su bidual) y finalmente se demostrarán los teoremas de inmersión y de aproximación por funciones suaves en dichos espacios.  This article is a brief review of Sobolev spaces, for which we present vector structure linked to Lp spaces. In addition, such spaces are displayed are normed, Banach, and some are separable reflexive (i, e, is isomorphic to its bidual) and finally immersion prove theorems and approximation by smooth functions in such spaces

Agentes estresores laborales en las enfermeras del servicio de emergencia COVID de un hospital nacional de Lima, 2021

El presente estudio tiene como objetivo: identificar los agentes estresores laborales en Enfermeras del Servicio de Emergencia COVID de un Hospital Nacional de Lima. Metodología: enfoque cuantitativo, tipo descriptivo. Técnica: encuesta virtual que constituyen de 15 ítems. Población y muestra: 80 enfermeras. Se concluye que agente estresor con más nivel de significancia es el de la fase de alarma con un nivel Medio de 34%. Asimismo, se determinó que el nivel de alarma de las enfermeras; es de nivel Medio con un 34%. En cuanto al nivel de resistencia de las enfermeras; es de nivel Alto con un 31%. Finalmente, el nivel de agotamiento de las enfermeras; es de nivel Alto con un 32%

Trilha interpretativa geoturística na Serra de São José no entorno da estrada real / MG

The study was developed on a trail known as the "trail of slaves" in the mountains of São José, Tiradentes city, Minas Gerais State, Brazil. This place has major lithological and pedological variations, besides historical importance. The access to the trail is easy along 1,356m in length. The mapping permitted to identify the geological aspects which are essentials for the dissemination of the geological heritage, geoconservation and geotourism.O estudo foi realizado em uma trilha, conhecida como "trilha dos escravos" na Serra de São José no município de Tiradentes/MG. Esta possui grandes variações litológicas, pedológicas, além da importância histórica. A partir do mapeamento num local de fácil acesso com 1.356m de extensão, contempla-se os aspectos geológicos com intenção de divulgação do patrimônio geológico, sua conservação, bem como o seu aproveitamento geoturístico

Psychometric evaluation and invariance of the Spanish version of the Block Fat Screener (BFS-E) in university students

IntroductionUniversity students constantly face a number of health challenges related to an unhealthy diet, characterized by a high intake of saturated fats.ObjectiveThis study aimed to analyze the psychometric properties of the Spanish version of the Block Fat Screener (BFS-E) food frequency questionnaire in a university population.MethodsAn observational analytical study of instrumental type was carried out in 5608 Peruvian university students. Based on the Block Fat Screener questionnaire, a back-translation and cultural adaptation process was carried out. The validity of the questionnaire was determined through exploratory factor analysis (EFA) and confirmatory factor analysis (CFA), hypothesizing a unidimensional structure. For the determination of reliability, the alpha coefficients were considered; likewise, the ω and H coefficients were used to evaluate the construct. The model explained 63% of the cumulative variance.ResultsThe CFA confirmed the unidimensionality of the 16-item questionnaire with appropriate goodness-of-fit indicators; therefore, which model of the Peruvian version adequately fits the observed data. The values of the reliability coefficients were higher than 0.90, with ordinal α = 0.94, ω = 0.94, and H = 0.95.ConclusionThe Spanish version of the Block Fat Screener food frequency questionnaire presents adequate psychometric properties and is therefore a valid scale to quickly measure fat intake in university students in a Latin American context

Body mass index and healthy lifestyle practices among Peruvian university students: a comparative study among academic discipline

BackgroundExcess body weight and an unhealthy lifestyle are a risk factor for noncommunicable diseases. University students are susceptible to unhealthy habits and obesity. This study compared body mass index (BMI) and healthy lifestyle practices among university students from four academic disciplines: Health Sciences, Business Sciences, Human Sciences and Education, and Engineering/Architecture.MethodsA cross-sectional study was carried out using a sample of 6,642 university students selected by non-probability convenience sampling. The Diet and Healthy Lifestyle Scale (DEVS), the Peruvian validation of the Vegetarian Lifestyle Index (VLI), was used to assess healthy lifestyle practices.ResultsStudents in the areas of Business Sciences and Engineering/Architecture had a higher BMI than their peers in Health Sciences (B = 0.35, 95% CI: 0.15–0.56 and 0.32, 95% CI: 0.13–0.52; p = 0.001). Additionally, these students tended to adopt less healthy lifestyle (B = −0.11, 95% CI: −0.20 to −0.01 and −0.09, 95% CI: −0.18 to −0.00; p < 0.05) compared to those in Health Sciences.ConclusionAlthough students of Health Sciences and Human Sciences and Education exhibited healthy lifestyle patterns, there is a clear need to improve eating and living habits in general among the university population to mitigate the risk factors associated with non-communicable diseases

Intake of foods high in saturated fats, vegetarian dietary pattern, and sociodemographic characteristics associated with body weight in Peruvian university students

BackgroundThe prevalence of obesity continues to increase among university students and the general population. Consumption of a diet high in saturated fats could be one of the risk factors.ObjectiveThe consumption of foods high in saturated fats, the vegetarian diet pattern, and sociodemographic characteristics associated with excess body weight (overweight/obesity) were evaluated in Peruvian university students.MethodsA cross-sectional study was carried out selecting 5,608 Peruvian university students through no probabilistic convenience sampling. The survey was carried out during the months of February and April 2022. The Chi-square test and binary logistic regression analysis were used to evaluate the association between diet (saturated fats intake and dietary pattern) and sociodemographic factors with excess body weight in a cross-sectional analysis.ResultsIt was observed that students who reported high consumption of foods high in saturated fats (ORB = 1.14) and those who had a non-vegetarian dietary pattern (ORB = 2.76) were found to be more likely to have excess body weight. On the contrary, students who reported adherence to the vegetarian diet pattern for more than 5 years were less likely to be overweight or obese (ORB = 0.84). Being ≥26 years of age (ORB = 3.28), living in urban areas (ORB = 1.68) and coastal areas of the country (ORB = 1.17), and enrolled in the engineering faculty (ORB = 1.19), were significantly associated with excess body weight.ConclusionThe findings of the current study evidenced several factors associated with excess body weight in university students. Therefore, it is necessary to promote and implement healthy lifestyle programs, considering sociodemographic and dietary aspects such as age and dietary intake to control and prevent obesity in university students

Associations between social network addiction, anxiety symptoms, and risk of metabolic syndrome in Peruvian adolescents—a cross-sectional study

BackgroundThe link between physical and mental health and screen time in adolescents has been the subject of scientific scrutiny in recent years. However, there are few studies that have evaluated the association between social network addiction (SNA) and metabolic risk in this population.ObjectiveThis study determined the association between SNA and anxiety symptoms with the risk of metabolic syndrome (MetS) in adolescents.MethodsA cross-sectional study was conducted in Peruvian adolescents aged 12 to 18 years, who completed a Social Network Addiction Questionnaire and the Generalized Anxiety Disorder 2-item scale (GAD-2), between September and November 2022. A total of 903 participants were included in the study using a non-probability convenience sample. Sociodemographic and anthropometric data were also collected. Binary logistic regression was used to explore the association between SNA and anxiety symptoms with MetS in a cross-sectional analysis.ResultsMales were more likely to have MetS than females (OR = 1.133, p = 0.028). Participants who were 16 years of age or older and those with excess body weight were 2.166, p = 0.013 and 19.414, p < 0.001 times more likely to have MetS, respectively. Additionally, SNA (OR = 1.517, p = 0.016) and the presence of anxiety symptoms (OR = 2.596, p < 0.001) were associated with MetS.ConclusionOur findings suggest associations between SNA, anxiety symptoms, and MetS among youth. However, more studies are needed to better understand this association and to deepen the possible clinical and public health implications

New genetic loci link adipose and insulin biology to body fat distribution.

Body fat distribution is a heritable trait and a well-established predictor of adverse metabolic outcomes, independent of overall adiposity. To increase our understanding of the genetic basis of body fat distribution and its molecular links to cardiometabolic traits, here we conduct genome-wide association meta-analyses of traits related to waist and hip circumferences in up to 224,459 individuals. We identify 49 loci (33 new) associated with waist-to-hip ratio adjusted for body mass index (BMI), and an additional 19 loci newly associated with related waist and hip circumference measures (P < 5 × 10(-8)). In total, 20 of the 49 waist-to-hip ratio adjusted for BMI loci show significant sexual dimorphism, 19 of which display a stronger effect in women. The identified loci were enriched for genes expressed in adipose tissue and for putative regulatory elements in adipocytes. Pathway analyses implicated adipogenesis, angiogenesis, transcriptional regulation and insulin resistance as processes affecting fat distribution, providing insight into potential pathophysiological mechanisms