In the world there are adverse climates, climates that hinder the good construction and paving of roads, generating insecurity among the locals and visitors. This over time affects the economy of a country, as a road boosts tourism, transport and commerce. Therefore, a mixture was designed to mitigate a problem in the placement of hot asphalt mixture at temperatures below zero degrees Celsius. That is, a conventional mix design was proposed, but with different types of filler (lime, Portland cement type I and silica) tested with the Marshall and Lottman method which are governed according to the EG-2013 standards [1] and parameters established in the Asphalt Institute [2]. To find the optimum, it was tested with 5.0%, 5.5% 6.0% and 6.5% asphalt cement. Then with the results obtained a comparative analysis was performed. Finally, specimens without any additives were made, the specimens on...

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The H-scan analysis of ultrasound images is a matched-filter approach derived from analysis of scattering from incident pulses in the form of Gaussian-weighted Hermite polynomial functions. This framework is applied in a preliminary study of thyroid lesions to examine the H-scan outputs for three categories: normal thyroid, benign lesions, and cancerous lesions within a total group size of 46 patients. In addition, phantoms comprised of spherical scatterers are analyzed to establish independent reference values for comparison. The results demonstrate a small but significant difference in some measures of the H-scan channel outputs between the different groups.

Objective. To identify the clinical and epidemiological characteristics related to lethality in patients hospitalized for COVID-19 at the Simón Bolívar Hospital in Cajamarca, during June-August 2020. Materials and Methods. This was a retrospective cohort, that used information collected from clinical records and official epidemiological surveillance systems (NOTIWEB, SISCOVID and SINADEF), on hospitalized patients with confirmed COVID-19 diagnosis. Information was collected on sociodemographic and clinical factors, considering discharge (death/survival) and days of hospitalization as outcomes. Results. The in-hospital fatality rate was 39.6%, and significant differences were found between hospitalization time and status at discharge in people over 60 years of age (p<0.001). Age older than 60 years (HR: 2.87; 95% CI: 1.76-4.68),) unattended ICU bed request (HR: 3.49; 95% CI: 2.02-6.05),...

Introducción: El control no farmacológico de los pacientes hipertensos debe ser evaluado pues ha demostrado ser beneficioso junto con el tratamiento farmacológico. No se conoce como es la autopercepción de consumo de sal en grupos hipertensos peruanos. Objetivo: Determinar la asociación entre percepción de consumo de sal en la dieta e hipertensión arterial en pobladores peruanos. Métodos: Estudio transversal analítico, mediante la entrevista de datos auto-reportados de la percepción de consumo de sal y el diagnóstico de hipertensión arterial, así como otras co-variables de interés. Se estimaron razones de prevalencia (RP) utilizando modelos lineales generalizados, familia Poisson, y usando ciudad como cluster.

Introduction: Non-pharmacological control of hypertensive patients should be evaluated as it has been shown to be beneficial along with pharmacological treatment. It is not known how is self-perception of salt consumption in Peruvian hypertensive groups. Objective: To determine the association between perception of salt consumption in the diet and arterial hypertension in Peruvian residents. Methods: Analytical cross-sectional study, through the interview of self-reported data on the perception of salt consumption and the diagnosis of arterial hypertension, as well as other co-variables of interest. Prevalence ratios (PR) were estimated using generalized linear models, Poisson family, and using the city as a cluster. Results: Of 4263 participants, 63.1% were women and the median age was 42 years. 53.3% said they consumed regular or a lot of salt in their diet. In multiple regression, the...