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1
artículo
Publicado 2023
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Face recognition has become relevant in the search for non-physical contact solutions in enclosed spaces for identity verification in the context of the SARS-CoV-2 pandemic. One of the challenges of face recognition is mask occlusion which hides more than 50 % of the face. This research evaluated four models pre-trained by transfer learning: VGG-16, RESNET-50, Vision Transformer (ViT), and Swin Transformer, trained on their upper layers with a proprietary dataset. The analysis obtained an accuracy of 24 % (RESNET-50), 25 % (VGG-16), 96 % (ViT), and 91 % (Swin) with unmasked subjects. While with a mask, accuracy was 32 % (RESNET-50), 53 % (VGG-16), 87 % (ViT), and 61 % (Swin). These percentages indicate that modern architectures such as the Transformers perform better in mask recognition than the CNNs (VGG-16 and RESNET-50). The contribution of the research lies in the experimentation wit...
2
artículo
Publicado 2023
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Face recognition has become relevant in the search for non-physical contact solutions in enclosed spaces for identity verification in the context of the SARS-CoV-2 pandemic. One of the challenges of face recognition is mask occlusion which hides more than 50 % of the face. This research evaluated four models pre-trained by transfer learning: VGG-16, RESNET-50, Vision Transformer (ViT), and Swin Transformer, trained on their upper layers with a proprietary dataset. The analysis obtained an accuracy of 24 % (RESNET-50), 25 % (VGG-16), 96 % (ViT), and 91 % (Swin) with unmasked subjects. While with a mask, accuracy was 32 % (RESNET-50), 53 % (VGG-16), 87 % (ViT), and 61 % (Swin). These percentages indicate that modern architectures such as the Transformers perform better in mask recognition than the CNNs (VGG-16 and RESNET-50). The contribution of the research lies in the experimentation wit...
3
artículo
Publicado 2017
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This article proposes to use the concept of communication for peace as a tool to improve the quality of information disseminated by the media. Firstly, it seeks to build a definition of communication for peace, and establish the minimum standards that this type of social communication matters. Then, it is intended to establish certain criteria to identify their presence in the media, and propose reforms in the respective public policies, but not before performing an analysis using statistics on the current situation of our radio and television.
4
tesis de grado
Publicado 2023
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In the context of the pandemic, face recognition became important as a non-physical contact verification method. Thus, this research evaluated the accuracy of pre-trained models (VGG-16, RESNET-50, Vision Transformer, Swin Transformer) for identity verification, facing the challenge of mask occlusion. The results revealed that the transformer models outperformed the CNNs in accuracy. This work contributes significantly by exploring two types of architectures and creating a public dataset, enriching computer vision research for face recognition with mask occlusion.
5
artículo
Publicado 2016
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Transformational leadership is effectively coupled with the development of university academic functions. The objective of the research was to build a Leadership model for university teachers in the Lambayeque region based on the Transformational Leadership approach. The specific objectives were to elaborate the theoretical framework and Historical antecedents of the leadership of the teachers in the universities through primary, secondary and tertiary sources, to identify the characteristics of the leadership of the university professor developed in their work performance, in the universities of the region, to analyze the problems of the work performance that must give Answer the university teacher, build the theoretical model based on the results obtained. The type descriptive and ethnographic study with the methods systemic, structural - functional and modeling. The results obtained g...
6
artículo
Publicado 2019
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The present article exposes the development of the research on the modeling of the windings of a power transformer to determine and analyze the transient voltages transferred to the secondary winding when an atmospheric impulse voltage is applied to the primary winding. Each winding is modeled considering its geometric and constructive form by means of concentrated electrical parameters - Resistance, Dielectric Conductance, Series Capacitances, Earth Capacitance, Inductiveness and Mutual Inductance - calculated with conventional formulations, which are incorporated into an integral model of the windings that explains his behavior in front of surges. The analysis is carried out with the support of a software of fast transients in the time domain, being able to demonstrate the utility of the model since it is possible to calculate, inside the windings, the transient voltages propagated and...
7
artículo
Publicado 2001
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The present work tries on the construction of a versatile transformer using the principle of electromagnetic induction to modify the tension of the alternating current. Being developed the construction procedure and the experimets that can be implemented at educational level.
8
artículo
Publicado 2001
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The present work tries on the construction of a versatile transformer using the principle of electromagnetic induction to modify the tension of the alternating current. Being developed the construction procedure and the experimets that can be implemented at educational level.
9
artículo
Publicado 2019
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The present article exposes the development of the research on the modeling of the windings of a power transformer to determine and analyze the transient voltages transferred to the secondary winding when an atmospheric impulse voltage is applied to the primary winding. Each winding is modeled considering its geometric and constructive form by means of concentrated electrical parameters - Resistance, Dielectric Conductance, Series Capacitances, Earth Capacitance, Inductiveness and Mutual Inductance - calculated with conventional formulations, which are incorporated into an integral model of the windings that explains his behavior in front of surges. The analysis is carried out with the support of a software of fast transients in the time domain, being able to demonstrate the utility of the model since it is possible to calculate, inside the windings, the transient voltages propagated and...
10
artículo
The study presented aims to promote and understand the agent commitment of students, future educators, in initial education through an expanded educational experience in order to proactively rethink their professional role. Participated 41 students from the Faculty and the Bachelor of Initial Education, who were studying the third year of the career at the National University of Río Cuarto, Argentina. Under an interpretive qualitative design, an expansive educational experience was designed so that students could proactively rethink their professional role from their agencies, based on an activity that proposed going to the territory, specifically, walking the city, in search of art to teach. Data were collected in three moments, during the investigation almost finished and already concluded. The results show that students develop proactive actions and emotions that motivate rethinking ...
11
tesis de grado
Arquitectura transformable como alternativa para implementar un CETPRO orientado al paisaje en Lurín
Publicado 2025
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Los huertos en el valle del río Lurín están en riesgo de desaparecer, uno de los principales motivos es que los terrenos agrícolas están siendo ocupados para usos de suelo prohibidos como: industrias, depósitos y comercio. Adicionalmente, el distrito de Lurín enfrenta una crisis de desocupación en la población joven, la cual contribuye a casos de inseguridad. Ante esta situación, se presenta un proyecto arquitectónico con el objetivo de integrar la actividad agraria con un programa que genere valor en la comunidad a través de los jóvenes vulnerables. La viabilidad de la propuesta se sustenta a través del estudio de la evolución histórica del lugar, la normativa vigente, casos análogos, teorías arquitectónicas, y el análisis del contexto social, ecológico y económico. Los datos indican que, la educación técnica a corto y mediano plazo es una propuesta atractiva por...
12
artículo
Publicado 1978
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In the present article the evolution of property is exposed. Previously, the essence of property was constituted by the right of enjoyment, disposition and organization of social work. Now, the property covers various aspects such as the relationship between the shareholder and its action, the right of the owner of rental houses, the relationship between the company and its asset assets. For all these reasons, the author affirms that property has become an analogical concept that allows confronting diverse realities. First of all, the concept of Napoleonic property will be taken as the starting point of reference, to then compare and observe the changes made in the legal system. Then analyze what is the role of property as an instrument and manifestation in society. In other words, the functioning of the liberal society within which classical property is developed will be examined to det...
13
libro
Traducción al inglés del libro “La voz puede ser un río transformador (Mujeres del Agua, Lambayeque)“ (ANA, diciembre del 2018)
14
artículo
This study addresses the global issue of marine pollution, with a particular focus on plastic bag contamination, by leveraging real-time object detection techniques powered by deep learning algorithms. A detailed comparison was carried out between the YOLOv8, YOLO-NAS, and RT-DETR models to assess their effectiveness in detecting plastic waste in underwater environments. The methodology encompassed several key stages, including data preprocessing, model implementation, and training through transfer learning. Evaluation was conducted using a simulated video environment, followed by an in-depth comparison of the results. Performance assessment was based on critical metrics such as mean average precision (mAP), recall, and inference time. The YOLOv8 model achieved an mAP50 of 0.921 on the validation dataset, along with a recall of 0.829 and an inference time of 14.1 milliseconds. The YOLO-N...
15
artículo
This study addresses the global issue of marine pollution, with a particular focus on plastic bag contamination, by leveraging real-time object detection techniques powered by deep learning algorithms. A detailed comparison was carried out between the YOLOv8, YOLO-NAS, and RT-DETR models to assess their effectiveness in detecting plastic waste in underwater environments. The methodology encompassed several key stages, including data preprocessing, model implementation, and training through transfer learning. Evaluation was conducted using a simulated video environment, followed by an in-depth comparison of the results. Performance assessment was based on critical metrics such as mean average precision (mAP), recall, and inference time. The YOLOv8 model achieved an mAP50 of 0.921 on the validation dataset, along with a recall of 0.829 and an inference time of 14.1 milliseconds. The YOLO-N...
16
artículo
Publicado 2025
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This paper presents a noise reduction method for electrocardiographic (ECG) signals with real-time application. The method was evaluated using digitized signals with resolutions of 14, 16, and 24 bits, durations ranging from 30 to 60 seconds, and a sampling frequency of 1000 Hz. Prior to its application, power line interference (220V/60Hz) is attenuated if present. The approach is based on signal decomposition via the Stationary Wavelet Transform (SWT), analyzing 10 detail levels and 10 approximation levels. It was identified that noise is primarily concentrated in the first four levels, occasionally extending to the fifth. To differentiate between useful signal and noise, histograms of the detail coefficients were analyzed, and key metrics such as kurtosis, relative wavelet energy (RWE), and standard deviation were computed to establish adaptive thresholds for effective noise removal. T...
17
artículo
Publicado 2021
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The objective of this work is to study some properties and applications of the Schwartz space. Initially, the Fourier transform is used to demonstrate the transform of the derivative and derivative of the transform. Then the completeness of the Schwartz space is studied and some properties are demonstrated. Finally the Fourier inversion formula and Plancherel’s theorem are proved.
18
artículo
Publicado 2020
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Many companies today say they are customer-centric and implementing digital transformation. We will address the first topic in this essay, which is thought to be the foundation and most importantly before beginning a process of digital transformation. Professor Peter Fader, from The Wharton School of the University of Pennsylvania, a university of preponderance, defines a customer centric company as one that knows its customers with greater future profitability and that aligns the development of products and the company's operations towards them.
19
artículo
Publicado 2020
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Many companies today say they are customer-centric and implementing digital transformation. We will address the first topic in this essay, which is thought to be the foundation and most importantly before beginning a process of digital transformation. Professor Peter Fader, from The Wharton School of the University of Pennsylvania, a university of preponderance, defines a customer centric company as one that knows its customers with greater future profitability and that aligns the development of products and the company's operations towards them.
20
artículo
Publicado 2020
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Many companies today say they are customer-centric and implementing digital transformation. We will address the first topic in this essay, which is thought to be the foundation and most importantly before beginning a process of digital transformation. Professor Peter Fader, from The Wharton School of the University of Pennsylvania, a university of preponderance, defines a customer centric company as one that knows its customers with greater future profitability and that aligns the development of products and the company's operations towards them.
