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This research was supported in part by the Peruvian National Council of Sciences, Technology and Innovation (CONCYTEC) through the Grant PROCYT315-2009 .
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Publicado 2018
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Introducción: la dispepsia funcional incluye trastornos crónicos y recurrentes del tracto digestivo superior y que no tienen origen orgánico. Objetivos: Los objetivos de este estudio fueron determinar los factores asociados con la dispepsia funcional entre los trabajadores de establecimientos de comida rápida en un centro comercial en Huancayo, Perú. Metodología: Este es un estudio analítico de corte transversal de 128 trabajadores de comida rápida en una ciudad en el altiplano peruano. Se utilizó un nuevo cuestionario para el diagnóstico de dispepsia para diagnosticar la dispepsia funcional y registrar las variables sociales, el consumo y los hábitos alimenticios. De esta información se obtuvieron medidas estadísticas de asociación. Resultados: el cuarenta por ciento de los encuestados tenía dispepsia funcional. Hubo una menor frecuencia de dispepsia funcional entre las m...
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Publicado 2021
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In automated plants, particularly in the petrochemical, energy, and chemical industries, the combined management of all of the incidents that can produce a catastrophic accident is required. In order to do this, an alarm management methodology can be formulated as a discrete event sequence recognition problem, in which time patterns are used to identify the safe condition of the process, especially in the start-up and shutdown stages. In this paper, a new layer of protection (a Super-Alarm), based on the diagnostic stage to industrial processes is presented. The alarms and actions of the standard operating procedures are considered to be discrete events involved in sequences; the diagnostic stage corresponds to the recognition of the situation when these sequences occur. This provides operators with pertinent information about the normal or abnormal situations induced by the flow of the ...
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Publicado 2022
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The geometric alteration of slopes is a reality that can be observed in several districts of the Peruvian capital. The construction of houses, roads, and other infrastructure can produce some slope instability and cause tragic events. Thus, a stability analysis was carried out for a slope located in the San Juan de Lurigancho district, specifically in the Virgen de Fátima sector. Therefore, for the present investigation, two models were made with the help of Phase2 software to identify the resistance reduction factors (SFR), which is a finite element-based program. To start the analysis, possible failures were identified, demonstrating that the slope does not present any possibility of failure. For the first model, we worked with a dip of 30° and identified an SFR = 19.26 for static conditions and an SFR = 9.66 for pseudo-static conditions. For the second model, we worked with a dip of...
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Publicado 2022
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Currently there are different techniques of soil improvement. One of them is the gravel columns that is one of the most popular and profitable techniques for soil improvement. This method of breeding increases the physical and mechanical properties of the soils. However, it has limitations, because part of the aggregates in non-specific areas can generate settlement that affects the structure. In this study, it reduces the settlement of the gravel column by making a change in a certain percentage in its structure by a concrete that is not reinforced. Different heights of the concrete are visualized, in addition to having different variants such as columns that are next to the base, as well as the columns that are on the sandy ground. The research was carried out with the simple compression machine with the concept of unit cell. The yield of the hybrid columns (gravel and concrete) had a ...
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Publicado 2019
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Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Producción Animal
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Publicado 2003
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En el presente trabajo se presenta el estudio del comportamiento de electrodos de Sn02 dopado con antimonio, Ti/SnO2-Sb y dopado con antimonio y platino, Ti/Sn02- Sb-Pt, así como del electrodo Co3O4 todos sobre soporte de titanio para su empleo en la electrooxidación de cianuro. Los electrodos fueron caracterizados por Microscopía electrónica de barrido (SEM), EDX y voltametría cíclica. Se ha evaluado el tiempo de vida útil de los electrodos en condiciones galvanostáticas, la densidad de corriente empleada fue de 100 mA/cm2. La electrooxidación de cianuro fue realizada en células tipo filtro prensa empleando densidades de corriente de 5 y 25 mA/cm2.
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Publicado 2003
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In this work the electrochemical behaviour of the electrodes of SnO₂ doped withantimony and also with antimony and platinum has been studied. A Co,O, electrodehas been also analysed all of them supported on a titanium substrate for its use in the electrooxidation of cyanide The electrodes were characterised by Scanning Electron Microscopy (SEM), EDX microanalysis and cyclic voltametry. The service life of the electrodes has been evaluated in galvanostatic conditions at 100 mA/cm². The electrooxidation of cyanide was performed in a filter press cell using current densities of 5 and 25 mA/cm².
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Introduction: Breast cancer is a heterogeneous disease, and the distribution of the different subtypes varies by race/ethnic category in the United States and by country. Established breast cancer-associated factors impact subtype-specific risk; however, these included limited or no representation of Latin American diversity. To address this gap in knowledge, we report a description of demographic, reproductive, and lifestyle breast cancer-associated factors by age at diagnosis and disease subtype for The Peruvian Genetics and Genomics of Breast Cancer (PEGEN-BC) study. Methods: The PEGEN-BC study is a hospital-based breast cancer cohort that includes 1943 patients diagnosed at the Instituto Nacional de Enfermedades Neoplásicas in Lima, Peru. Demographic and reproductive information, as well as lifestyle exposures, were collected with a questionnaire. Clinical data, including tumor Horm...
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Latina women in the U.S. have relatively low breast cancer incidence compared to Non-Latina White (NLW) or African American women but are more likely to be diagnosed with the more aggressive "triple negative" breast cancer (TNBC). Latinos in the U.S. are a heterogeneous group originating from different countries with different cultural and ancestral backgrounds. Little is known about the distribution of tumor subtypes in Latin American regions. Clinical records of 303 female Peruvian patients, from the Peruvian National Cancer Institute, were analyzed. Participants were diagnosed with invasive breast cancer between 2010 and 2015 and were identified as residing in either the Selva or Sierra region. We used Fisher's exact test for proportions and multivariable Cox Proportional Hazards Models to compare overall survival between regions. Women from the Selva region were more likely to be dia...
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Publicado 2021
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Background: In the face of unprecedented challenges because of coronavirus disease 2019, interdisciplinary pediatric oncology teams have developed strategies to continue providing high-quality cancer care. This study explored factors contributing to health care resilience as perceived by childhood cancer providers in all resource level settings. Methods: This qualitative study consisted of 19 focus groups conducted in 16 countries in 8 languages. Seven factors have been previously defined as important for resilient health care including: 1) in situ practical experience, 2) system design, 3) exposure to diverse views on the patient's situation, 4) protocols and checklists, 5) teamwork, 6) workarounds, and 7) trade-offs. Rapid turn-around analysis focused on these factors. Results: All factors of health care resilience were relevant to groups representing all resource settings. Focus group...
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Publicado 2023
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PURPOSEMultiple myeloma (MM) is a highly heterogeneous, incurable disease most frequently diagnosed in the elderly. Therefore, data on clinical characteristics and outcomes in the very young population are scarce.PATIENTS AND METHODSWe analyzed clinical characteristics, response to treatment, and survival in 103 patients with newly diagnosed MM age 40 years or younger compared with 256 patients age 41-50 years and 957 patients age 51 years or older.RESULTSThere were no statistical differences in sex, isotype, International Scoring System, renal involvement, hypercalcemia, anemia, dialysis, bony lesions, extramedullary disease, and lactate dehydrogenase (LDH). The most used regimen in young patients was cyclophosphamide, bortezomib, dexamethasone, followed by cyclophosphamide, thalidomide, dexamethasone and bortezomib, thalidomide, dexamethasone. Of the patients age 40 years or younger, o...
