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1
Publicado 2025
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Introducción: El cáncer gástrico es una de las principales causas de mortalidad a nivel mundial. Su detección temprana y una estadificación precisa es clave para mejorar pronóstico. La TCMD, EUS y RM son herramientas clave en su evaluación. Objetivo: Evaluar la eficacia de la TCMD y sus diferentes protocolos en la estadificación del cáncer gástrico, comparándola con la EUS y la RM, considerando precisión diagnóstica, impacto terapéutico y costo-efectividad. Metodología: Se realizó una revisión narrativa de 20 estudios publicados entre 2014 y 2024 en bases de datos como PubMed y Google Scholar, priorizando revisiones sistemáticas y estudios de alta rigurosidad metodológica, en inglés y español. Descripción de hallazgos: La TCMD presentó una sensibilidad del 100% en tumores avanzados (T4) y del 88% en afectación ganglionar, mientras que la EUS mostró mayor sensibil...
2
tesis de maestría
Studies indicate that air pollutant concentrations affect human health. Especially, Fine Particulate Matter (PM2.5) is the most dangerous pollutant because this is related to cardiovascular and respiratory diseases, among others. Therefore, governments must monitor and control pollutant concentrations. To this end, many of them have implemented Air quality monitoring (AQM) networks. However, AQM stations are usually spatially sparse due to their high costs in implementation and maintenance, leaving large áreas without a measure of pollution. Numerical models based on the simulation of diffusion and reaction process of air pollutants have been proposed to infer their spatial distribution. However, these models often require an extensive inventory of data and variables, as well as high-end computing hardware. In this research, we propose two deep learning models. The first is a generative...
3
tesis de grado
Publicado 2021
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Low Density Parity Check codes presents itself as the dominant FEC code in terms of performance, having the nearest performance to the Shannon limit and proving its usefulness in the increasing range of applications and standards that already used it. Low power devices are not except of this rapid development, where it emerges the necessity of decoders of low power without totally sacrificing performance or resource usage. The present work details the devolopment of a LDPC decoder compliant with the DVB-S2 standard for digital television, motivated for its already established use in uplink and downlink satellite applications and its great performance at large code lengths. This research presents the study of the min-sum algorithm and the design of the elements that conform the core decoder, including both functional units (variable and check nodes), memory blocks and routing network. In ...
4
artículo
Publicado 2021
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Digital competences in teachers imply the development of functional capacities for the progress of virtual educational activities, and due to the current context (global health crisis), they need them as a priority of technology to insert themselves into digital citizenship. In the educational task, precisely in the work performance of the teaching staff, they serve as tools that provide sustainability for the development of virtual education. The objective of this research is to review the theories and foundations of digital skills in teachers located between the years 2017 and 2021. The applied methodology is the systematic review with processes of review, selection and analysis of 441 articles. 40 scientific documents were compiled under criteria of selection of the literature. The results conclude that digital competences are the skills that empower the individual to use digital medi...
5
tesis de grado
Publicado 2021
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The evaluation of the quality of the water in rivers is necessary to manage the efficiency of its use, being necessary to carry out physicochemical and biological analyzes to determine its healthiness, but it implies in its determination of a series of parameters that use various analytical methods that often they are tedious and time consuming to calculate. The present study makes a comparison of machine learning models such as Multiple Linear Regression (MLR), Neural Network Backpropagation (BPNN) and Support Vector Regression (SVR) to estimate Dissolved Oxygen (DO) and Biochemical Oxygen Demand (BOD) to determine the quality of the water of the Rímac river. Water samples were collected from 26 stations and non-point sources of contamination along the Rímac River with 624 records made during the years 2010 to 2012. The physical and chemical parameters introduced in the models include...
6
tesis de grado
Publicado 2021
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Low Density Parity Check codes presents itself as the dominant FEC code in terms of performance, having the nearest performance to the Shannon limit and proving its usefulness in the increasing range of applications and standards that already used it. Low power devices are not except of this rapid development, where it emerges the necessity of decoders of low power without totally sacrificing performance or resource usage. The present work details the devolopment of a LDPC decoder compliant with the DVB-S2 standard for digital television, motivated for its already established use in uplink and downlink satellite applications and its great performance at large code lengths. This research presents the study of the min-sum algorithm and the design of the elements that conform the core decoder, including both functional units (variable and check nodes), memory blocks and routing network. In ...
7
artículo
Publicado 2025
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Background: Breast cancer is one of the main causes of morbidity and mortality among women around the world. In Peru, it has recently surpassed cervical cancer as the most commonly reported cancer. Studying the relationship between intrinsic breast cancer subtypes and disease staging can optimize diagnosis, prognosis, and treatment. Therefore, there is a need for better risk stratification, selection of personalized treatment, and improved early detection strategies. We conducted this study to address the lack of data on underrepresented populations such as the Peruvian population. The objective of the study was to analyze the distribution of intrinsic subtypes of breast cancer and their correlation with prognostic factors and demographic characteristics among women in Peru. Methods: A descriptive, retrospective observational study was conducted, analyzing 67 cases of breast cancer of va...
8
artículo
Publicado 2012
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The study describes the development of pathological lesions in guinea pigs (Cavia porcellus) experimentally intoxicated through the ingestion of pellets containing one third of Pteridium aquilinum and two thirds of concentrate during 135 days. The guinea pig was used as a experimental model for cattle with Bovine Enzootic Haematuria (BEH). Twelve female animals with a mean of 400 g body weight were used. Two of them, selected at random, were slaughtered on days 30, 60, 90 and 120 days and the last 4 on day 135 of the trial. The lesions developed were neoplastic, inflammatory, degenerative and adaptation processes. Tumors mainly developed in the bladder, lung, intestine, spleen and lymph nodes. In the bladder, epithelial neoplasms (transitional cell carcinomas) and nonepithelial neoplasms (leiomyosarcoma and myxoma), together with inflammatory processes (chronic nonsuppurative cystitis) a...
9
artículo
Publicado 2012
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The study describes the development of pathological lesions in guinea pigs (Cavia porcellus) experimentally intoxicated through the ingestion of pellets containing one third of Pteridium aquilinum and two thirds of concentrate during 135 days. The guinea pig was used as a experimental model for cattle with Bovine Enzootic Haematuria (BEH). Twelve female animals with a mean of 400 g body weight were used. Two of them, selected at random, were slaughtered on days 30, 60, 90 and 120 days and the last 4 on day 135 of the trial. The lesions developed were neoplastic, inflammatory, degenerative and adaptation processes. Tumors mainly developed in the bladder, lung, intestine, spleen and lymph nodes. In the bladder, epithelial neoplasms (transitional cell carcinomas) and nonepithelial neoplasms (leiomyosarcoma and myxoma), together with inflammatory processes (chronic nonsuppurative cystitis) a...
10
artículo
Publicado 2025
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La producción de material vegetal en viveros forestales, requiere de sustratos que generen condiciones favorables para el crecimiento y desarrollo de la plántula, más aún, en regiones secas del trópico en Latinoamérica donde estos procesos se hacen complejos por las pocas alternativas para conformarlos. Se evalúa, la viabilidad de integrar a sustratos de crecimiento el residuo estéril de carbón mineral generado por la extracción en socavón en el municipio de Enciso Santander - Colombia. Para esto se estableció en predios de la Mina Peña Rica 1, un diseño de bloques al azar de veinte repeticiones, en cinco tratamientos conformados por residuo estéril de carbón, materias primas locales como bovinaza, caprinaza, arena, suelo local y cascarilla de arroz en diferentes combinaciones. La respuesta al crecimiento se evaluó durante seis meses, en condiciones controladas de vivero...
11
informe técnico
Publicado 2025
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Introducción: El Carcinoma Hepatocelular (CHC) es una de las neoplasias malignas más frecuentes del hígado y requiere de métodos de diagnóstico precisos para su estudio, como la Tomografía Computarizada de Energía Dual (TCED), que aporta información detallada de la composición tisular y vascularización de las lesiones. Objetivo: Analizar los beneficios, limitaciones y la eficacia diagnóstica de la Tomografía Computarizada de Energía Dual en el diagnóstico del Carcinoma Hepatocelular comparándola con otras técnicas diagnósticas. Metodología: Esta revisión narrativa empleó artículos en inglés publicados del 2014 al 2024, extraídos de PubMed. Inicialmente, se seleccionó artículos en base a título y abstract, luego sólo los de texto completo. Finalmente, se aplicaron criterios de elegibilidad. Descripción de hallazgos: Se revisaron 56 artículos según criterios d...
