Tópicos Sugeridos dentro de su búsqueda.
Tópicos Sugeridos dentro de su búsqueda.
1
artículo
Publicado 2024
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Denoising diffusion probabilistic models (DDPMs) have demonstrated significant potential in addressing complex image processing challenges. This paper explores the application of DDPMs in three different areas: reconstruction of remote sensing imagery affected by cloud cover, reconstruction of facial images with occluded areas, and segmentation of bodies of water from remote sensing imagery. Inpainting involves filling in missing regions in images, while DDPMs act as data generators capable of synthesizing information that alings coherently with the context of the original data. Inspired by the inpainting technique, the RePaint approach was adapted and applied to reconstruction tasks. The WaterSegDiff approach, which uses a diffusion model as a backbone, was employed for the segmentation task. To illustrate the model’s behavior and provide examples of the tasks, experiments were carrie...
2
artículo
Publicado 2024
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Denoising diffusion probabilistic models (DDPMs) have demonstrated significant potential in addressing complex image processing challenges. This paper explores the application of DDPMs in three different areas: reconstruction of remote sensing imagery affected by cloud cover, reconstruction of facial images with occluded areas, and segmentation of bodies of water from remote sensing imagery. Inpainting involves filling in missing regions in images, while DDPMs act as data generators capable of synthesizing information that alings coherently with the context of the original data. Inspired by the inpainting technique, the RePaint approach was adapted and applied to reconstruction tasks. The WaterSegDiff approach, which uses a diffusion model as a backbone, was employed for the segmentation task. To illustrate the model’s behavior and provide examples of the tasks, experiments were carrie...
3
artículo
Publicado 2021
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In the present work, a mathematical model is developed which involves the equations of fluid mechanics and the energy equation to determine the temperature field of the liquid steel that enters a container to solidify, a situation commonly found in production processes of steel today. Using mathematical techniques, a simplified equation of the energy equation is obtained in which a non-dimensional parameter Pe, the Peclet number, allows to evaluate the transport of the heat by convection to the transmission by diffusion occurred in the mold that contains liquid steel. Using finite differences method, the mathematical model formulated is solved numerically to visualize the cooling process of the liquid steel, from the beginning until the solidification process starts. Likewise, the numerical computations are carried out using GNU-Octave, which is a platform to the scientific programming w...
4
artículo
Publicado 2021
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In the present work, a mathematical model is developed which involves the equations of fluid mechanics and the energy equation to determine the temperature field of the liquid steel that enters a container to solidify, a situation commonly found in production processes of steel today. Using mathematical techniques, a simplified equation of the energy equation is obtained in which a non-dimensional parameter Pe, the Peclet number, allows to evaluate the transport of the heat by convection to the transmission by diffusion occurred in the mold that contains liquid steel. Using finite differences method, the mathematical model formulated is solved numerically to visualize the cooling process of the liquid steel, from the beginning until the solidification process starts. Likewise, the numerical computations are carried out using GNU-Octave, which is a platform to the scientific programming w...
5
artículo
Publicado 2020
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In the age of the Internet, anonymous online users can form a societal reaction by posting large quantities of critique and insulting comments against (perceived) norm violations on social media. These so-called online firestorms, or Enjō in Japanese, tend to include aggressive behavior against the target. This research aims to reveal the dynamics of Enjō and explores how people communicate with each other in the formation process of Enjō by conducting a comparative case study. This study collects tweets posted in five Enjō cases and compares each case to create conceptual categories of the communication process of Enjō. Results show that the participants of Enjō interact with each other to define the problem of concern through exchange of information. Moreover, it is revealed that there are two types of process in the escalation of Enjō, “social problematization” and “villa...
6
artículo
Purpose. The purpose of this article is to propose a detailed methodology to estimate, model and incorporate the non-constant volatility onto a numerical tree scheme, to evaluate a real option, using a quadrinomial multiplicative recombination. Design/methodology/approach. This article uses the multiplicative quadrinomial tree numerical method with non-constant volatility, based on stochastic differential equations of the GARCH-diffusion type to value real options when the volatility is stochastic. Findings. Findings showed that in the proposed method with volatility tends to zero, the multiplicative binomial traditional method is a particular case, and results are comparable between these methodologies, as well as to the exact solution offered by the Black–Scholes model. Originality/value. The originality of this paper lies in try to model the implicit (conditional) market volatility ...
7
artículo
Publicado 2025
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El estudio evaluó la acción antagonista in vitro de postbióticos, derivados de probióticos nativos de suri (Rhea pennata) frente a Escherichia coli asociado a enteritis bacteriana en suris. Las cepas probióticas aisladas, Lacticaseibacillus, Bacillus rugosus y Pichia ethanolica fueron obtenidas de 30 muestras de heces de suris en cautiverio aparentemente sanos. Los probióticos aislados fueron cultivados en solución de melaza al 5%, solos o en combinaciones para obtener los postbióticos. La prueba de inhibición se realizó mediante el método de difusión en agar Müeller-Hinton, empleando pozos perforados en el medio con cultivo de E. coli e inoculando 50 µL de los postbióticos filtrados a través de membranas con poros de 0.22 µm, obtenidos tanto de cultivos individuales como de combinaciones de dos y tres cepas probióticas. Se midieron los halos inhibitorios del crecimient...
8
artículo
In contrast to the concept that on Nefrósico Syndrome be had in the past, when a degenerative disease túbulis was accepted, is now considered ( 1, 7 , 39) that primitive disorder of Nefrósico Syndrome sits mainly in the basal membrane glomerulus , allowing increased permeability , especially for low molecular weight proteins ( Aliaand Gamma- globulins ) and only secondarily then occurs tubular alterations. Nefrósico syndrome , characterized clinically by marked edema, albuminaria , hypoalbuminemia and hypercholesterolemia , is presented in a series of processes , such as some Diffuse glomerulonephritis Chronic Renal amyloidosis , Diabetes Mellitus ( Kimmelstiel -Wilson syndrome ) , thrombosis renal vein , infectious (syphilis and malaria ) , effects of various drugs ( mercurial compounds , etc.).
9
artículo
In Peru, information on the biotechnological potential of native fungi for the degradation of cellulose presents few records. This work aimed to evaluate the cellulolytic activity of isolated fungi in the departments of Cajamarca, Lima, Junín and Huánuco. 289 species of fungi were subjected to reactivation after a conservation period of 7 years using filter paper and Czapeck broth, evaluated semi-quantitatively using the radial diffusion technique on Czapeck Na-CMC agar to then select five strains that were morphologically identified and its cellulolytic capacity was also determined by the Somogyi-Nelson method. 90% (260) of the fungi that underwent semi-quantitative evaluation were reactivated, selecting five strains for their greater clearance area: 14.9, 12.5, 12.0, 14.4 and 12.7 x 102 mm2; SA 726 (Paecilomyces sp), SA 668 (Paecilomyces sp), SA 651 (Paecilomyces sp), SA 683 (Fusariu...
10
artículo
Publicado 2022
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The following study has as purpose giving knowledge about the chemical and nutritional content of the vhite quinua coming from the main areas of production of our country, as well as it diffuseness of its nutritional value inside the population, contributing to improve the level and quality of life of peruvians.For this study, it was taken 30 samples of white quinua coming from different mountain soils of Junín, Puno, Apurímac, Cusco y Ancash deparments (six samples for each one).They were obtained at random from the cultivated fields. The circunstances of this work was when the crop of this species was carried out and taken to the regional markets.We proceeded to the determination of the protein content by the method of Microkjeldhal, aminoacids content by liquid cromatography of high performance, Fat determination, carbohydrates, ash, fiber, humidity and temperature according to Peru...
11
artículo
Publicado 2017
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Disease transmitting microorganisms, such as bacteria, viruses and fungi, are the main causes of hospital‐acquired infections (HAI). This is the justification for the development of nanotechnology‐based new materials and, in particular, for the synthesis of antibacterial nanocomposites of the type polymer / antibacterial metal, which create surfaces with a large bacteria inhibiting activity. In the present work, antibacterial polymeric nanocomposites have been created by preparing polyvinyl chloride (PVC) from a resin emulsion as plastisol and synthesizing copper nanoparticles in‐situ within the polymer matrix. The methodology of the process includes the synthesis of a copper precursor, its dispersion by ultrasonic pulses, its stabilization and mixing with other PVC additives, in order to obtain chemical reduction during the gelation of the plastisols. Analysis of the PVC / NPsCu0 ...
12
artículo
Publicado 2017
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Disease transmitting microorganisms, such as bacteria, viruses and fungi, are the main causes of hospital‐acquired infections (HAI). This is the justification for the development of nanotechnology‐based new materials and, in particular, for the synthesis of antibacterial nanocomposites of the type polymer / antibacterial metal, which create surfaces with a large bacteria inhibiting activity. In the present work, antibacterial polymeric nanocomposites have been created by preparing polyvinyl chloride (PVC) from a resin emulsion as plastisol and synthesizing copper nanoparticles in‐situ within the polymer matrix. The methodology of the process includes the synthesis of a copper precursor, its dispersion by ultrasonic pulses, its stabilization and mixing with other PVC additives, in order to obtain chemical reduction during the gelation of the plastisols. Analysis of the PVC / NPsCu0 ...
13
tesis de grado
Publicado 2019
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Esta tesis tuvo como objetivo determinar el nivel de relación entre el uso de una aplicación Android de realidad virtual en la difusión de los atractivos turísticos de Manacamiri 2019, es de tipo descriptiva–correlacional la misma que evalúa la relación de las variables: "Aplicación móvil de realidad virtual" y "difusión de los atractivos turísticos de Manacamiri 2019", para lograr los objetivos propuestos. El estudio es el no experimental de tipo transaccional. Como técnica de recolección de datos, se utilizó encuestas, porque se evaluó la valoración de los turistas con respecto al aplicativo Android y la opinión acerca de la información que muestra el aplicativo. Los datos fueron procesados empleando el software estadístico SPSS, los cuales se organizó en tablas para facilitar su análisis e interpretación de la información. Se utilizó la prueba estadística chi...
14
tesis de grado
Publicado 2002
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The present study, was carried out in the laboratories of Analysis and Composition of Agroindustrial Products (ANACOMPA), Agroindustrial Products Technology of non Food (TEPANAL), Laboratory of Engineering and Design of the faculty of Agroindustrial Engineering of the San Martín National University. The research found for to even incentivate the use of the no exploted wild cultivations, like it is the case of the Jergón Sacha's (Dracontium sp.), which are distributed in the whole Amazonía, in cultivated or wild form, being used totally for the cure of diverse illnesses. The study understand diversa analysis, so much of the matter prevails as of the finished product, as well as the necessary chemical and sensorial analyses. The samples of Jergón Sacha's cormo ( Dracontiun sp.), were collected in the town of Pamashto, located to 1 O Km of province of lamas zone, with minimum temperatur...
15
tesis de maestría
Publicado 2024
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Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Estadística Aplicada
16
tesis de maestría
Publicado 2017
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En la presente tesis de maestría se reporta la preparación, caracterización y evaluación de electrodos de fieltro de grafito modificados con nanoaleaciones de Cu-Ag (NPs Cu- Ag), para su aplicación en procesos electro Fenton. El fieltro de grafito fue caracterizado mediante voltametría cíclica (VC), para evaluar su comportamiento electroquímico, encontrándose una mejor eficiencia al ser activado en un rango de voltaje de -2 a 2 V. Los electrodos activados fueron tratados mediante electro oxidación en presencia de HNO3 1 M y luego se caracterizaron mediante espectroscopía infrarroja por transformada de Fourier (FT-IR). Los electrodos tratados fueron modificados mediante la deposición de NPs Ag, Cu y Cu-Ag, en medio ligeramente ácido, mediante el método de amperometría de pulso diferencial (DPA). La presencia de las NPs se confirmó mediante análisis por UV-vis de reflectan...
17
tesis de grado
Publicado 2022
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El presente trabajo de investigación consistió en la evaluación de controles de velocidad autosintonizados por lógica difusa correspondientes a diferentes números de zonas de difusificación y desdifusificación en su sistema difuso, implementados en un robot móvil diferencial tipo oruga y desempeñado en un terreno agrícola a diferentes velocidades. Todo esto, con el objetivo de determinar las características en el dominio del tiempo para cada sistema de autosintonización a diferentes velocidades en terrenos agrícolas; los cuales, suelen ser de difícil acceso para robots no diseñados en condiciones de irregularidad en su trayectoria. El trabajo inició con el sustento del uso de los controladores autosintonizables basados en lógica difusa. Se mencionó que la mayoría de las plantas en el mundo real son no lineales y variantes en el tiempo, por lo tanto, para su accionamien...
18
tesis de maestría
Publicado 2017
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En la presente tesis de maestría se reporta la preparación, caracterización y evaluación de electrodos de fieltro de grafito modificados con nanoaleaciones de Cu-Ag (NPs Cu- Ag), para su aplicación en procesos electro Fenton. El fieltro de grafito fue caracterizado mediante voltametría cíclica (VC), para evaluar su comportamiento electroquímico, encontrándose una mejor eficiencia al ser activado en un rango de voltaje de -2 a 2 V. Los electrodos activados fueron tratados mediante electro oxidación en presencia de HNO3 1 M y luego se caracterizaron mediante espectroscopía infrarroja por transformada de Fourier (FT-IR). Los electrodos tratados fueron modificados mediante la deposición de NPs Ag, Cu y Cu-Ag, en medio ligeramente ácido, mediante el método de amperometría de pulso diferencial (DPA). La presencia de las NPs se confirmó mediante análisis por UV-vis de reflectan...
19
tesis de grado
Publicado 2016
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Universidad Nacional Agraria La Molina. Facultad de Industrias Alimentarias. Departamento Académico de Ingeniería de Alimentos y Productos Agropecuarios
20
tesis de grado
Publicado 2016
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The present qualified work of investigation "IMPLEMENTATION OF E-LEARNING PLATFORM FOR IMPROVING THE ACADEMIC LEVEL MANAGEMENT IN PRIVATE SECONDARY SCHOOL CARMELITAS ONES OF THE CITY OF TRUJILLO", has evaluated the characteristics of the development of the most relevant processes of the institution in study, problems being observed as the lack of diffusion of the web page, scanty didactic content in the portal Web, traditional use of informative means, unnecessary expenses of material for the diffusion of information, between others; of which was observed that deficiency in the Management of Information of the institution, of which it is not achieved to expire in its entirety with the goals that are planned. Our project seeks to improve the Management of Information across the construction of a e-learning platform for the secondary level, of which one expects to optimize the number of in...
