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1
artículo
Publicado 2020
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The present study was carried out, with the purpose to determine the level of knowledge about non-ionizing radiation and cell phone use in students of the 1st, 2nd cycle of obstetrics at UDCH, November 2019. A study was conducted correlational, prospective cross where the following variables are considered: level of knowledge about non-ionizing radiation and the use of cell phones directly or indirectly at the time of the study. The studied sample was chosen at random, fulfilling the inclusion and exclusion criteria, where a total of 110 students are found. The level of knowledge was measured through a structured and validated survey by the researchers. It was found that the level of knowledge about non-ionizing radiation was 58.4%, being of a low level of knowledge, regarding the use of cell phones, 69.4% used the cell phone in an inappropriate way, 59.3% of the female students have low...
2
artículo
Publicado 2021
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The city of Bagua is located in the northern part of Peru, on a natural platform on the right bank of the Utcubamba River, at 400 meters above sea level, with an average temperature of 32 °C, where the university city is located. In order to measure UV radiation, a RIKA Electronic Technology Co., Ltd. mini-station, model RK900-05, was installed on the campus of the Universidad Nacional Intercultural Fabiola Salazar Leguía de Bagua, to record data during the period March-November 2019. The data were subjected to a statistical analysis that included, averages, standard deviation and frequency distribution among others. This work shows us the values of UV radiation in the university city finding a radiation ranging between 6000 μW/m2 to 7000 μW/m2 in the months March-April, between 4000 μW/m2 to 6000 μW/m2 in the months May-July, the highest values of UV radiation were recorded in the...
3
artículo
Publicado 2020
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The objective is to quantify and characterize the ultraviolet B radiation on the city of Tacna using the basic ultraviolet B (UV-B) radiation information corresponding to the period 2012 - 2014, registered in the main agricultural meteorological station MAP-Jorge Basadre Grohmann, city of Tacna, operated by SENAMHI, through the measurement of the ultraviolet radiation index (IUV). The ultraviolet B radiation indices determined at the daily, monthly, seasonal and multi-annual levels reached maximum values of 8 to 10 at very high risk levels and 11 at extremely high risk levels in the months of January, February, November and December with frequencies of occurrence 67% and 33%, while the minimum rates recorded were 3 to 5 with a moderate level of risk in the hours of 8:00 am and 5:00 pm, with frequencies of 40% and 83% during the months of June and July respectively. The results obta...
4
artículo
Publicado 2023
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This study includes the temporal analysis of the levels of NO2, CO, and ground-level O3 measured in Lima Metropolitana between the years 2015 to 2018 and the relationship between them and with air temperature and solar radiation. For this, descriptive, correlational, and regression temporal analyzes were carried out using hourly records taken in different areas of the city. The levels of the gases evaluated were mainly below the Peruvian regulations and the World Health Organization's air quality guidelines, so their influence on the health of the population was not relevant. The hourly levels of these gases were bimodal and were influenced by vehicular traffic for NO2 and CO, and by solar radiation for ground-level O3; although, the latter may also have been influenced by its nocturnal movement. Daily behavior showed the so-called "weekend effect". The correlation analysis indicated a h...
5
artículo
Publicado 2006
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From the discovery that low dose of radiation could produce effects on the human health, the study of the environmental radiation stopped to only be a scientific matter to become a problem of public health. Presently work, carried out in Julio’s months and August of the 2006 in the central area of the Peru, from the 0 to the 4800 meters on the level of the sea, two hundred fifty radiation measures have been obtained in twenty-five towns between Lima and Morococha, embracing five natural regions. The averages in opposing level of equivalent dose were, in the region Chala (0-500 meters of altitude), 240 nSv/h; in the region Yunga (500-2300 meters), 260,8 nSv/h; in the Quechua region (2300-3500 meters), 341.4 nSv/h; in the region Jalca (3500-4000 meters), 404,2 nSv/h; and the region Puna (4000-4800 meters), 515 nSv/h. The annual average in equivalent dose of the five regions was of 3,2 mS...
6
artículo
Publicado 2013
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The global average background dose for a human being is about 2.4 millisievert (mSv) per year. This exposure is produced mainly by cosmic radiation and radioactive materials that are naturally in the environment and are the reason why the level of natural radiation of the background varies from one zone to another in some areas and that this level is significantly higher than the average [3]. Such areas include Ramsar in Iran, Guarapari in Brazil, Kerala in India, the northern Flinders Ranges in Australia and Yangjiang in China. In order to know the background radiation in our country, and their possible impacts on living things continue along these lines, the present study was conducted environmental ionizing radiation measurements along routes linking Cuzco to Machu Picchu. In these locations 10 measurements were made at random locations away at least 6 meters of buildin...
7
artículo
Occupational exposure levels for Magnetic Equipment, Surgical and Therapeutics Diathermy were evaluated. No damage was observed, nonetheless workers still show concern; exposure levels are lower than the ICNIRP limits. Records should be established, to continue long-term research .
8
artículo
Occupational exposure levels for Magnetic Equipment, Surgical and Therapeutics Diathermy were evaluated. No damage was observed, nonetheless workers still show concern; exposure levels are lower than the ICNIRP limits. Records should be established, to continue long-term research .
9
artículo
Publicado 2020
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The objective is to quantify and characterize the ultraviolet B radiation on the city of Tacna using the basic ultraviolet B (UV-B) radiation information corresponding to the period 2012 - 2014, registered in the main agricultural meteorological station MAP-Jorge Basadre Grohmann, city of Tacna, operated by SENAMHI, through the measurement of the ultraviolet radiation index (IUV). The ultraviolet B radiation indices determined at the daily, monthly, seasonal and multi-annual levels reached maximum values of 8 to 10 at very high risk levels and 11 at extremely high risk levels in the months of January, February, November and December with frequencies of occurrence 67% and 33%, while the minimum rates recorded were 3 to 5 with a moderate level of risk in the hours of 8:00 am and 5:00 pm, with frequencies of 40% and 83% during the months of June and July respectively. The results obta...
10
artículo
Publicado 2024
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ABSTRACT This paper seeks to relate the level of perception and the use of protective measures by the population to bodily harm caused by the incidence of ultraviolet (UV) radiation. The research is relational in scope, cross-sectional in design and without manipulation of variables. As a procedure for collecting information, the survey was defined as a method, the interview as a technique and the questionnaire as an instrument; this tool was developed by the researcher and validated by experts. A population sample of 267 residents was used. The data collected was processed using the SPSS v. 25.0 program. The results allow us to assert the existence of a direct correlation between the perception of ultraviolet (UV) radiation and the measures adopted for their protection by the inhabitants of the city of Huaraz.
11
tesis de grado
Development of a prototype antenna radiation pattern measurement system using Software-Defined Radio
Publicado 2025
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Este trabajo presenta el diseño y la implementación de un prototipo de sistema automatizado para medir los patrones de radiación de antenas, utilizando radio definida por software (SDR), una plataforma giratoria accionada por motor paso a paso y componentes personalizados impresos en 3D. El sistema funciona con una unidad de procesamiento Raspberry Pi, equipada con una interfaz de pantalla táctil para el control en tiempo real y la visualización de datos. El prototipo permite barridos automatizados de 360° tanto en el plano horizontal (acimut) como en el vertical (elevación), lo que facilita las mediciones de la intensidad de la señal en un amplio rango de frecuencias inferiores a 6 GHz (70 MHz- 5,9 GHz). El prototipo se validó midiendo el patrón de radiación de una antena flexible de banda ultra ancha (700 a 6000 MHz) en condiciones de campo lejano y en un entorno no anecoico...
12
artículo
Publicado 2008
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The main objective of this study was to give a very simple approach to exposure levels from extremely low frequency fields (ELF) and radiofrequency (RF) electromagnetic fields from a sample of typical microwave ovens in Lima city, in arder to asses the compliance of emissions limits established by IEEE and the maximum exposure limits established as reference levels in the ICNIRP 's Guidelines. This work was carried out on a sample of 14 domestic microwaves ovens from different brands, installed in several office in INICTEL-UNI, in Lima city, in 2006. It consisted of a bibliographic research on biological and health efjects related to frequencies used in microwaves oven; a bibliographic research on emission and exposure limits; and measurements of ELF electric and magnetic fields at 60 Hz plus measurements of radiofrequency electric fields at 2. 4 GHz, evaluating them against internationa...
13
artículo
Publicado 2017
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This work focuses on simple methods that allow comparison of the photoprotective effects of sunscreens. One such method described by Mansur and colleagues relies on the spectrophotometric measurements of the organic filters extracted with ethanol. The extracts are subjected to absorbance measurements in the of 290 to 320 nm range, with 5 nm intervals. The sunscreen sun protection factor (SPF) is estimated with an equation that relates each absorbance value with their respective erythemal effect, at the wavelength used for each measurement. In the current work, three commercial sunscreens were assayed using this method, which produced SPF values that were markedly lower than those declared by the manufacturers. These results prompted a more thorough analysis, which concluded that the Mansur method is not suitable for assaying sunscreens with SPFs above 15. The analysis included a survey o...
14
artículo
Publicado 2024
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Detailed measurements of background radiation in counts per minute (cpm) and dose rates (µSv/h) have been conducted in all the libraries of the National University of San Marcos, located in the University City of Lima, Peru. Radiation measurements were carried out using Geiger-Müller counters to ensure a thorough evaluation of background radiation levels in these educational settings. The results show that the detected radiation levels range between \(14 \pm 1.22\) and \(26 \pm 1.14\) cpm, with an average of \(22 \pm 1.32\) cpm. Additionally, the dose rate values in the libraries range between \(0.16 \pm 0.02\) and \(0.25 \pm 0.03\) \(\mu Sv/h\), with an average of \(0.21 \pm 0.02\) \(\mu Sv/h\). The measurements were conducted in late June and early July 2024, a period of high student concentration due to the proximity of final exams. The facilities of the various libraries span from ...
15
tesis de grado
Publicado 2024
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Los nanofluidos son excelentes sustitutos de los refrigerantes en los radiadores de los vehículos y tienen la capacidad de mejorar significativamente el rendimiento del sistema de refrigeración en los mismos. Se realizó un estudio numérico del desempeño térmico e hidráulico de un radiador de pala hidráulica minera utilizando nanofluidos. Hasta el momento no se registran trabajos de investigación realizados previo a analizar el radiador de este equipo minero. Se utilizó óxido de aluminio en etilenglicol y agua como nanofluido en concentraciones de volumen del 0,5%, 1,0% y 1,5%. Los resultados mostraron que el rendimiento de transferencia de calor del radiador puede verse afectado si no se varían los parámetros de funcionamiento térmico del equipo para aprovechar los beneficios que brindan los nanofluidos. Adicionalmente, se ha encontrado que el desempeño de la caída de pre...
16
artículo
Publicado 2022
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In radiotherapy, it is essential to have an alternative dosimetric system to identify possible errors at some stage of the process. The optically stimulated luminescence (OSL) technology represents a great advance in the detection of radiation in different areas, one of them being in the area of clinical dosimetry. Objective: To implement an alternative dosimetric system, based on OSL technology of carbon-doped aluminum oxide crystals. Material and methods: Al2or3:C detectors called "nanodot", MicroStar reader, ionization chambers (Standard Imaging and PTW Freiburg), electrometers (PTW-Freiburg and MNCNP) and other accessories. Results: The dosimetric - algorithmic procedure, developed for the calculation of the adsorbed dose in the tumor volume, reproduces the dose values with uncertainties less than 2% for a confidence level of 95% and with relative differences less than 5%...
17
artículo
Publicado 2006
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Desde el descubrimiento que dosis bajas de radiación podría producir efectos sobre la salud humana, el estudio de la radiación ambiental dejó de ser sólo un asunto científico para convertirse en un problema de salud pública. En el presente trabajo, realizado en los meses de julio y agosto del 2006 en la zona central del Perú, desde los 0 a los 4800 metros sobre el nivel del mar, se han obtenido doscientas cincuenta medidas de radiación en veinticinco localidades entre Lima y Morococha, abarcando cinco regiones naturales. Los promedios en nivel de dosis equivalentes encontrados fueron, en la región Chala (0-500 metros de altitud), 240 nSv/h; en la región Yunga (500-2300 metros), 260,8 nSv/h; en la región Quechua (2300-3500 metros), 341,4 nSv/h; en la región Jalca (3500-4000 metros), 404,2 nSv/h; y la región Puna (4000-4800 metros), 515 nSv/h. El promedio anual en dosis equiv...
18
tesis de grado
Publicado 2024
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El presente informe por suficiencia profesional ha sido por la puesta en marcha, montaje y traslado del tomógrafo multicorte de marca SIEMENS modelo Somaton Definition AS – 64 líneas para ser instalado en el Hospital San José de Chincha, con el objetivo de poder realizar un diagnóstico mucho más preciso y saber el estado de severidad de la neumonía por COVID-19 La demanda para instalar un tomógrafo computarizado de alta tecnología en la provincia de Chincha, ha sido por un aumento exponencial de casos por COVID-19 reportados en esta ciudad según DIRESA ICA (marzo 2021) [1], debido a esto, el objetivo de este informe fue la instalación del tomógrafo multicorte que tuvo como finalidad reducir la tasa de mortalidad mientras se esperaba una vacuna para este mal y así mejorar la calidad en la atención del sector de salud pública. Este tomógrafo permite a los pacientes, tomar ...
19
artículo
Publicado 2024
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Cone Beam Computed Tomography offers highly precise 3D images ideal for diagnosis and case planning, although this imaging method involves the use of high doses of radiation. When considering the optimization principle, radiation dose reduction methods aim to modify the technical parameters of the equipment to obtain an ideal combination between dose and image quality. This is important in the pediatric patient because the highest levels of risk are associated with X-ray exposure in this age group. We present the case of an 11-year-old female patient is presented, in which a low-resolution protocol is used to locate the maxillary retained canines. The advantages and practical application of this imaging study method are analyzed by performing variations in exposure parameters. Supported by tomographic images, the surgical procedure is carried out to subsequently a guided eruption, achiev...
20
artículo
Publicado 2005
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A software was implemented in visual environment that carries out the analysis of covering of a BTS of cellular telephony, starting from parameters provided by the maker of the antenna and of the digital data corresponding to the topography of the place. The implemented software has graphic interfaces to enter the parameters of the antenna, radiation pattern, etc. and coordinated of the location. The program presents a visual report of the covering by means of a code of colors, indicating the different reception levels and the report on the obtained data of the calculation of covering of a station bases, using mathematical models for systems outdoor. The data for the validation of the present work were obtained of the implementation of a station it bases cellular of tests, consistent in a transmitter of cellular telephony in the band of 800 MHz, sectoral antenna, was carried out the mens...
