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1
tesis de maestría
Publicado 2007
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Las señales espectralmente puras son un requisito indispensable cuando el generador de señales (SG) se va a utilizar como parte de un banco de pruebas. Sin embargo, incluso los equipos sofisticados pueden no cumplir con las necesidades impuestas por ciertas aplicaciones. Este trabajo aborda el problema mediante el uso de la distorsión digital previa (DPD) basada en un modelo polinómico sin memoria obtenido para la SG. Usando la SG en modo arbitrario (ARB), una señal de entrada es generada por computadora y reproducida por la SG. La precisión de la medición se garantiza mediante el muestreo de coherencia y la coincidencia de cuadrícula con el analizador de señal (SA). Finalmente, se utiliza una cuidadosa alineación temporal para comparar las señales de tres tonos transmitidas y recibidas para obtener los coeficientes de los polinomios. Los resultados muestran que la precisión ...
2
artículo
Publicado 2024
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The primary focus of this article was to employ Ultralytics technology, specifically YOLOv8, in object recognition. This involved utilizing supervised learning and other machine learning techniques. The article took into consideration the definitions of object detection and model training to effectively categorize solid waste, thereby facilitating recycling efforts. Following this, each object class was manually identified using the LabelImg tagger, considering the positions of the objects within the images. This approach led to the analysis of 1517 images and produced notably high-quality and significant results.
3
artículo
The research analyzes the sustainability of environmental indicators, which is essential in the proposals for sustainable development models. In similarity to the ideal physical model of the harmonic movement of masses for its application in a sustainability concept, the Adapted Holzer Method is used to conceptualize the Sustainable Harmonic Movement (MAS) in its economic, social, environmental and institutional dimensions of the system components environmental. The main characteristics, advantages and disadvantages of MAS are exposed. Likewise, the requirements and the analysis of graphics are established for the acceptance of simulations of the models. Finally, the sustainability simulation results applied to a group of environmental indicators are presented. The application verifies that the analysis of sustainability components using the physical model facilitates decision-making to ...
4
artículo
The research analyzes the sustainability of environmental indicators, which is essential in the proposals for sustainable development models. In similarity to the ideal physical model of the harmonic movement of masses for its application in a sustainability concept, the Adapted Holzer Method is used to conceptualize the Sustainable Harmonic Movement (MAS) in its economic, social, environmental and institutional dimensions of the system components environmental. The main characteristics, advantages and disadvantages of MAS are exposed. Likewise, the requirements and the analysis of graphics are established for the acceptance of simulations of the models. Finally, the sustainability simulation results applied to a group of environmental indicators are presented. The application verifies that the analysis of sustainability components using the physical model facilitates decision-making to ...
5
tesis de maestría
Publicado 2022
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BERT produces state-of-the-art solutions for many natural language processing tasks at the cost of interpretability. As works discuss the value of BERT’s attention weights to this purpose, we contribute with an attention-based interpretability framework to identify the most influential words for stance classification using BERT-based models. Unlike related work, we develop a broader level of interpretability focused on the overall model behavior instead of single instances. We aggregate tokens’ attentions into words’ attention weights that are more meaningful and can be semantically related to the domain. We propose attention metrics to assess words’ influence in the correct classification of stances. We use three case studies related to COVID-19 to assess the proposed framework in a broad experimental setting encompassing six datasets and four BERT pre-trained models for Portugu...
6
tesis doctoral
Publicado 2025
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Maintaining the stability of bipedal walking remains a major challenge in humanoid robotics, primarily due to the large number of hyperparameters involved and the need to adapt to dynamic environments and external disturbances. Traditional methods for determining these hyperparameters, such as heuristic approaches, are often time- consuming and potentially suboptimal. In this thesis, we present an integrated approach combining advanced control and reinforcement learning techniques to improve the stability of bipedal walking, particularly in the face of ground disturbances and speed variations. Our main contribution lies in the integration of two complementary approaches: (1) an intrinsically stable model predictive control (IS-MPC) combined with whole-body admittance control, and (2) a reinforcement learning module implemented in the mc_rtc framework. This system allows for continuous mo...
7
artículo
In this article we consider the importance of evaluation models based on competencies. First, we find the background that led to its realization, as a preamble to the problem is solved. It also considers the degree of acceptance of competencybased model. Then, we present the methodological processes that were used to provide an empirical answer and its agreement with the theory. Among the findings it was found that the learning assessment model sample acceptance levels (75.25%). It also is recommended to set an evaluation system under a model such as this, which integrates performance, performance, scope, goals and achievement clear and well defined, that is also reliable and allow the identification of the level of efficiency are performed individual and group activities.
8
artículo
In this article we consider the importance of evaluation models based on competencies. First, we find the background that led to its realization, as a preamble to the problem is solved. It also considers the degree of acceptance of competencybased model. Then, we present the methodological processes that were used to provide an empirical answer and its agreement with the theory. Among the findings it was found that the learning assessment model sample acceptance levels (75.25%). It also is recommended to set an evaluation system under a model such as this, which integrates performance, performance, scope, goals and achievement clear and well defined, that is also reliable and allow the identification of the level of efficiency are performed individual and group activities.
9
artículo
The recent concept of Territory-museum arose in the second half of the 90s, as a strategy to define a management model based on the musealization of a territory, in order to contribute to the sustainable development of rural areas. In that model, the following are emphasized: interventions in the conservation of natural and cultural heritage, tangible and intangible; the active and leading participation of society; and, the implementation of a territorial interpretation plan. In the present work, the origins of the concepts of ecomuseums and theories of interpretation will be detailed, and the characteristics of the Territory-museum and the elements that are part of it, will be explained. Finally, there will be a comparative analysis of three cases in Italy, Spain and Argentina, in order to show the shared characteristics and differences, within the framework of the scope and regional va...
10
artículo
The recent concept of Territory-museum arose in the second half of the 90s, as a strategy to define a management model based on the musealization of a territory, in order to contribute to the sustainable development of rural areas. In that model, the following are emphasized: interventions in the conservation of natural and cultural heritage, tangible and intangible; the active and leading participation of society; and, the implementation of a territorial interpretation plan. In the present work, the origins of the concepts of ecomuseums and theories of interpretation will be detailed, and the characteristics of the Territory-museum and the elements that are part of it, will be explained. Finally, there will be a comparative analysis of three cases in Italy, Spain and Argentina, in order to show the shared characteristics and differences, within the framework of the scope and regional va...
11
tesis de grado
Publicado 2022
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La industria de construcción ha experimentado a través de los años un problema preocupante el cual es el incremento de accidentes de trabajo. Esto ha ocasionado que muchos trabajadores tengan una lesión orgánica, perturbación funcional o psiquiátrica, una invalidez o en el peor de los casos la muerte. En Perú, se producen más de 20 mil accidentes de trabajo cada año. Estos accidentes generan pérdidas monetarias e ineficiencias en el proceso para la entrega final de la obra afectando la rentabilidad de las empresas. A partir del problema planteado, se desarrolló un modelo de seguridad basado en Lean Construction y Seguridad Basada en el Comportamiento con el objetivo de reducir el número de accidentes e implementar una cultura de seguridad dentro de una empresa peruana del sector construcción mediante el análisis de indicadores. La implementación se desarrolló mediante un...
12
artículo
Nowadays information systems are struggling to achieve the desired success, because one of its components is the development of web application struggle to be done, this is it because it takes a while for the creation of programming and once separately to create the data model, there is no technique that integrates both. Recent studies have shown that there are several programming techniques such as object oriented programming, aspect‐ oriented programming and programming targeted agents, and the creation of the data model are also techniques such as database connection object‐oriented entity, The this research aims to develop a web development technique based on database modeling object‐oriented model using entity relationship. Consequently, this study proposes two measures to validate the performance of web application development using analysis of variance, first the number of l...
13
artículo
Nowadays information systems are struggling to achieve the desired success, because one of its components is the development of web application struggle to be done, this is it because it takes a while for the creation of programming and once separately to create the data model, there is no technique that integrates both. Recent studies have shown that there are several programming techniques such as object oriented programming, aspect‐ oriented programming and programming targeted agents, and the creation of the data model are also techniques such as database connection object‐oriented entity, The this research aims to develop a web development technique based on database modeling object‐oriented model using entity relationship. Consequently, this study proposes two measures to validate the performance of web application development using analysis of variance, first the number of l...
14
artículo
Objetive: The investigation consisted in investigating and validating an evaluation model of teacher's performance through the modeling of structural SEM equations applying LISREL. Method: An initial model based on the results of investigations and data from bibliographic referents was proposed. In previous studies they only consider the influence of some variables over the result variable. The proposed initial model consists of fourteen constructs. Six exogenous and six endogenous with their respective observable or measureable variables and in accordance with the causal methodology a diagram of cause is plotted — effect among the constructs, each relationship between the variables is codified for its statistical treatment. Information about the observable variables was collected through previously validated questionnaires from three sources: students, teachers and the immediate autho...
15
artículo
Objetive: The investigation consisted in investigating and validating an evaluation model of teacher's performance through the modeling of structural SEM equations applying LISREL. Method: An initial model based on the results of investigations and data from bibliographic referents was proposed. In previous studies they only consider the influence of some variables over the result variable. The proposed initial model consists of fourteen constructs. Six exogenous and six endogenous with their respective observable or measureable variables and in accordance with the causal methodology a diagram of cause is plotted — effect among the constructs, each relationship between the variables is codified for its statistical treatment. Information about the observable variables was collected through previously validated questionnaires from three sources: students, teachers and the immediate autho...
16
artículo
Objetive: The investigation consisted in investigating and validating an evaluation model of teacher's performance through the modeling of structural SEM equations applying LISREL. Method: An initial model based on the results of investigations and data from bibliographic referents was proposed. In previous studies they only consider the influence of some variables over the result variable. The proposed initial model consists of fourteen constructs. Six exogenous and six endogenous with their respective observable or measureable variables and in accordance with the causal methodology a diagram of cause is plotted — effect among the constructs, each relationship between the variables is codified for its statistical treatment. Information about the observable variables was collected through previously validated questionnaires from three sources: students, teachers and the immediate autho...
17
artículo
Publicado 2019
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The consulting companies that are engaged in market research and the development of public and private projects are facing the excessive time spent in the field, which results in the loss of customers and under the commitment of the services that are offered. During the data collection, there is a non-sample error, which comes from the interviewee, where they are not sufficiently objective and sincere with their performance on the survey. For this study we consider the veracity patterns to admit a survey that can come from: questionnaires, scales or inventories. The objective of this study was to develop an android application that allows to elaborate a veracity model of surveys in urban and rural areas. In this context, the research shows a solution based on a model of veracity of surveys, which is based on an android application and that can be used in any District, it also allows to p...
18
artículo
Publicado 2019
Enlace
Enlace
The consulting companies that are engaged in market research and the development of public and private projects are facing the excessive time spent in the field, which results in the loss of customers and under the commitment of the services that are offered. During the data collection, there is a non-sample error, which comes from the interviewee, where they are not sufficiently objective and sincere with their performance on the survey. For this study we consider the veracity patterns to admit a survey that can come from: questionnaires, scales or inventories. The objective of this study was to develop an android application that allows to elaborate a veracity model of surveys in urban and rural areas. In this context, the research shows a solution based on a model of veracity of surveys, which is based on an android application and that can be used in any District, it also allows to p...
19
artículo
Publicado 2019
Enlace
Enlace
The consulting companies that are engaged in market research and the development of public and private projects are facing the excessive time spent in the field, which results in the loss of customers and under the commitment of the services that are offered. During the data collection, there is a non-sample error, which comes from the interviewee, where they are not sufficiently objective and sincere with their performance on the survey. For this study we consider the veracity patterns to admit a survey that can come from: questionnaires, scales or inventories. The objective of this study was to develop an android application that allows to elaborate a veracity model of surveys in urban and rural areas. In this context, the research shows a solution based on a model of veracity of surveys, which is based on an android application and that can be used in any District, it also allows to p...
20
artículo
Publicado 2019
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The main objective of this research was to propose a management model based on transformational leadership to improve the quality of university processes. It was attended by all managers (10 participants), administrative workers (7 participants), teachers (164 teachers) and students (340 participants) who belong to the different Professional Schools of the Private University Filial Chiclayo. A quasi-experimental study was made. The results obtained show that after having analyzed the components of the university process and having made a 360 ° assessment in relation to the leadership of the managers, it is necessary to apply a management model with a certain type of leadership, which according to the theory It should be based on the type of transformational leadership. This type of management model has contributed to improving the quality of the processes of the aforementioned universit...
