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1
tesis doctoral
A crucial aspect of evaluating and maintaining a photovoltaic (PV) installation connected to the grid is the availability of models that describe its operation reliably in real operating conditions. The nominal power of the PV generator (P*M) is considered an essential input parameter, and several models have been proposed to estimate P*M for characterizing the PV system. In the case of PV generators in outdoor conditions, the American Society for Testing and Materials, the International Electrotechnical Commission, and others have proposed procedures to determine the P*M of the generator. As part of these procedures, monitoring days with ideal conditions is mandatory, notably days with a clear sky, high irradiance values, and low wind speeds. Such restrictions can limit the number of suitable monitoring days, especially in places where clouds frequently form. This thesis proposes a new ...
2
tesis doctoral
A crucial aspect of evaluating and maintaining a photovoltaic (PV) installation connected to the grid is the availability of models that describe its operation reliably in real operating conditions. The nominal power of the PV generator (P*M) is considered an essential input parameter, and several models have been proposed to estimate P*M for characterizing the PV system. In the case of PV generators in outdoor conditions, the American Society for Testing and Materials, the International Electrotechnical Commission, and others have proposed procedures to determine the P*M of the generator. As part of these procedures, monitoring days with ideal conditions is mandatory, notably days with a clear sky, high irradiance values, and low wind speeds. Such restrictions can limit the number of suitable monitoring days, especially in places where clouds frequently form. This thesis proposes a new ...
3
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 ...
4
artículo
Publicado 2018
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This article aims to present a model that reflects the need for educational innovation that higher education institutions (HEIs) should consider when restructuring their administration, renewing their educational curriculum including entrant/graduate profiles, and collaborating with the various interest groups within the industry and society. The methodology of this study is qualitative, supported by a documented and cross-sectional investigation. As a result, a model is shown that represents the various elements that make up the need and relevance of educational innovation in HEIs. Through this model, educational innovation is shown to be a current necessity and all HEIs must assume their capacities to give it importance and take action for change.
5
artículo
Publicado 2018
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This article aims to present a model that reflects the need for educational innovation that higher education institutions (HEIs) should consider when restructuring their administration, renewing their educational curriculum including entrant/graduate profiles, and collaborating with the various interest groups within the industry and society. The methodology of this study is qualitative, supported by a documented and cross-sectional investigation. As a result, a model is shown that represents the various elements that make up the need and relevance of educational innovation in HEIs. Through this model, educational innovation is shown to be a current necessity and all HEIs must assume their capacities to give it importance and take action for change.
6
artículo
Publicado 2022
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Currently there are tools that generate source code automatically. We propose a source code generation architecture focused on the 3-layer architecture, additionally we build a source code generation tool. The Tool allows to load a database schema and from this it generates the source code for the SQL Server and C# language, we use an .xls file to import or export the database schema. We have used 5 code generation requirements and their database schemas for the test, obtaining as a result the generation of source code without errors. Carrying out the time analysis, our model generates 6,998 lines of code per second, in total we have generated 13,283 lines of source code in 1472 milliseconds that correspond to 5 requirements for generating source code with their respective databases.
7
artículo
Publicado 2019
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The aim of study was to propose a learning model for the generation and cognitive technological reach in biomedicine. From the key words: learning model, cognitive technology domain, biomedicine on the ScienceDirect platform, a search was made of the last three complete years (2018, 2017, 2016) and published work until the present date of 2019. Only the research articles and the journals were considered: Computer Methods and Programs in Biomedicine; Future Generation Computer Systems, Computer Science Procedures, Computers in Biology and Medicine, Data & Knowledge Engineering, Technological Forecasting and Social Change, Social Science & Medicine. The Computer Methods and Programs in Biomedicine journal presented the largest number of articles. There were statistically significant differences in relation to the rest, but there were no articles that showed cognitive models for tec...
8
artículo
This article on the ethics of artificial intelligence, based on image generation, contains a comprehensive analysis of the ethical and practical dilemmas associated with AI. In the introduction, we highlight the widespread impact of AI on human society and emphasize the importance of addressing the ethical dilemmas arising from its use, distinguishing in areas such as decision making in autonomous vehicles. The methodology proposed includes literature review, ethical self-assessment using specialized tools, and case study analysis to identify ethical and unethical patterns. The results achieved reveal that the models are capable of generating high quality images in an ethical manner, avoiding the promotion of harmful stereotypes. However, the presence of biases and lack of transparency in the model is determined. Practical ethical considerations for the use of the model in real app...
9
artículo
Publicado 2020
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The possession of integral models that allow to dimension new knowledge continues being a challenge to demonstrate. The purpose of study was to describe a methodological cognitive model for the generation and contribution of scientific results. Through the quantitative technique by content analysis, the proposed model was constructed, which consisted of three processes: 1st) management of scientific information, 2nd) cognitive interpretation; and 3rd) scientific writing. Each process derives recognition structures in a transitional manner, which makes it possible to, the construction towards a validated information. It was concluded that, in any field of research, it is required from the capture of primary information until the new scientific communication achieved as far as the proposed model allowed.
10
artículo
Publicado 2020
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The possession of integral models that allow to dimension new knowledge continues being a challenge to demonstrate. The purpose of study was to describe a methodological cognitive model for the generation and contribution of scientific results. Through the quantitative technique by content analysis, the proposed model was constructed, which consisted of three processes: 1st) management of scientific information, 2nd) cognitive interpretation; and 3rd) scientific writing. Each process derives recognition structures in a transitional manner, which makes it possible to, the construction towards a validated information. It was concluded that, in any field of research, it is required from the capture of primary information until the new scientific communication achieved as far as the proposed model allowed.
11
tesis de maestría
Publicado 2023
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Descargue el texto completo del repositorio institucional de la Universidade de São Paulo: https://doi.org/10.11606/D.18.2023.tde-14062023-095148
12
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...
13
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...
14
artículo
Publicado 2019
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The purpose was to analyze how the transfer of knowledge is managed in an institution of higher education by analyzing a model of structural equations. The research was conducted on the basis proposed by Molina and Marsal (2002) model, analyzing the implication of the high direction, organizational culture, management skills, technology, knowledge management processes and indicators. The questionnaire consisted of 34 questions in Likert scale. Cronbach’s alpha coefficient obtained for the six variables was .948. It was noted that managers integrate and support knowledge management; participants are considered responsible for their own information. The influence of the observed variables in the variable under study was identified through analysis of a structural equation model.
15
artículo
Publicado 2022
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Different companies that provide digital services must have sophisticated software that allows various operations to be carried out in a timely and safe manner, keeping the program in constant improvement, updating and options to incorporate new market technologies. Many companies still use legacy systems as their main tool for business processes, while others use outdated technologies that limit their ability to upgrade or migrate to modern technologies, turning this scenario into a threat to the security of IT systems with which they operate, which jeopardizes the performance and productivity of the company. This article implements a software architecture modeling and code generation tool based on Microservices and Domain Driven Design (DDD), to facilitate and accelerate the development of software projects and the migration of legacy systems to new independent services, by while using...
16
artículo
Publicado 2018
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This paper describes the implementation of a tool for automated generation of user stories from a graphical model. The objective-oriented modeling approach is applied, which uses the notation i*. The main rationale is that the business objective is not the one that changes, but the ways in which it can be achieved. Once the requirements are compiled through this model, user stories are generated automatically for later traceability. These comply with the basic standard proposed in agile methodologies ensuring that, when arriving at the hands of the developer, there are no ambiguities in either of the two perspectives: graphical and narrative. The results of the tests with developers and analysts, as well as the application of a questionnaire, showed that the proposed tool contributes directly to the establishment of precise, complete and consistent requirements, optimizing the time used ...
17
artículo
Publicado 2018
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This paper describes the implementation of a tool for automated generation of user stories from a graphical model. The objective-oriented modeling approach is applied, which uses the notation i*. The main rationale is that the business objective is not the one that changes, but the ways in which it can be achieved. Once the requirements are compiled through this model, user stories are generated automatically for later traceability. These comply with the basic standard proposed in agile methodologies ensuring that, when arriving at the hands of the developer, there are no ambiguities in either of the two perspectives: graphical and narrative. The results of the tests with developers and analysts, as well as the application of a questionnaire, showed that the proposed tool contributes directly to the establishment of precise, complete and consistent requirements, optimizing the time used ...
18
artículo
Software development underwent a significant transformation through the integration of generative artificial intelligence (AI) technologies. The research set out to evaluate the influence of these technologies in different industries and their implications on development processes through a systematic analysis of their impact and implementation in various industrial sectors. The PRISMA methodology was implemented for the analysis of publications between 2022 and 2024 in the Scopus and SciELO databases, using specific inclusion criteria and key terms related to AI applications. The study revealed significant adoption in the pharmaceutical, food, dental and maxillofacial health, maritime, mining, telecommunications, mental health and medical education industries, registering a substantial increase in scientific production, which evolved from 40 documents in 2022 to 54 in 2024. The geograph...
19
artículo
The objective of the research is to present a model of knowledge management for micro and small enterprises engaged in the sale of computers and software; for which we have considered the identification of activities that generate knowledge, the mechanisms that contribute to communication, communication control and integration of knowledge; as well as the identification and understanding of the contextual elements associated with communication, control and generation of knowledge. These elements were analyzed through the study of five cases in qualitative research and thirty respondents in quantitative research. The interview, direct observation, documents and surveys were the main data collection methods used in the study and the empirical validation of the model of knowledge management. The results indicate that the generation of knowledge depends on the technical personnel of enterpri...
20
tesis de grado
Publicado 2024
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This research work describes a project to improve the electrical installations of a mining site in Peru due to energy shortage problems. The mining site is vital for the national production of silver, lead and zinc, which boosts the economy and generates employment. The lack of electricity supply affects ventilation in underground workings and other operations. The capacity of the existing generator sets does not cover the demand, and energy is rationalized, generating outages in the camp and other operational areas, affecting the quality of life of the collaborator. The improvement proposal consists of centralizing two generating sets in the same place, a main GE and an auxiliary one, an installation design is proposed that covers the sizing of the generating set to the power distribution, and applying reactive power compensation through capacitors. A model 3508TA generator set with a p...
