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Recent Submissions

Statistical-mathematical procedure to determine the cooling distribution of a chiller plant

Díaz Torres, Yamile; Hernández Herrera, Hernán; Torres del Toro, Migdalia; Álvarez Guerra, Mario A.; Gullo, Paride; Silva Ortega, Jorge I (Elsevier Ltd.United Kingdom, 2022)

This paper presents a procedure to determine the cooling capacity distribution of the chillers composing a chiller plant using a statistical analysis of the building cooling demand. The mathematical-statistical procedure ...
Evaluation, hierarchy and selection of the best source of energy by using AHP, as a proposed solution to an energy and socio-economic problem, in the case of Colombia’s Pacific zone

Moreno Rocha, Christian Manuel ; Fernández Pérez, David; Rodríguez Retamoza, Jesus; Silva Ortega, Jorge I; Brieva Bohorquez, Denis; TABORDA CATALAN, LUIS ALBERTO (EconJournalsTurkey, 2022-09-27)

This research presents the process and the results to weigh and classify a set of criteria and subcriteria to be considered in Renewable Energy Planning projects for a particular area of Colombia. The implementation of ...
Comparative experimental analysis of the fire resistance of sandwich panels with polyisocyanourate core reinforced with fiberglass fabric

Murillo, Michel; Acosta P, Aura; Quesada Q, Claudia; Abisambra G, Valery; Tutikian, Bernardo; Christ, Roberto (Elsevier BVUnited Kingdom, 2022)

Sandwich panels are systems with structural functions that are used in the field of civil construction, currently, they are used in the construction of buildings and also as cladding for walls, ceilings, among others. This ...
A deep learning model of radio wave propagation for precision agriculture and sensor system in greenhouses

Cama-Pinto, Dora; Damas, Miguel; Holgado-Terriza, Juan Antonio; Arrabal Campos, Francisco Manuel; Martínez Lao, Juan Antonio; Cama-Pinto, Alejandro; Manzano-Agugliaro, Francisco (MDPI AGSwitzerland, 2023-01-13)

The production of crops in greenhouses will ensure the demand for food for the world’s population in the coming decades. Precision agriculture is an important tool for this purpose, supported among other things, by the ...
An analysis of urban block initiatives influencing energy consumption and solar energy absorption

Acwin Dwijendra, Ngakan Ketut; Rahardja, Untung; Bharath Kumar, Narukullapati; Patra, Indrajit; Maher, Musaddak; Finogenova, Yulia; Grimaldo Guerrero, John William; Emad Izzat, Samar; Alawsi, Taif (MDPI AGSwitzerland, 2022-11-01)

Population growth and urbanization cause developing-country cities to create energy-intensive buildings. Building energy efficiency can be improved through active and passive solar design to reduce energy consumption, ...
Energy simulation and parametric analysis of water cooled thermal photovoltaic systems: energy and exergy analysis of photovoltaic systems

Candra, Oriza; NARUKULLAPATI, BHARATH KUMAR; Dwijendra, Ngakan Ketut Acwin; Patra, Indrajit; Majdi, Ali; Rahardja, Untung; Kosov, Mikhail; Grimaldo Guerrero, John William; R, Sivaraman (MDPI AGSwitzerland, 2022-11-14)

It is generally agreed that solar energy, which can be converted into usable electricity by means of solar panels, is one of the most important renewable energy sources. An energy and exergy study of these panels is the ...
Application of neural network and dual-energy radiation-based detection techniques to measure scale layer thickness in oil pipelines containing a stratified regime of three-phase flow

Mayet, Abdulilah; Tzu-Chia, Chen; Ahmad, Ijaz; Tag elDin, Elsayed; Al-Qahtani, Ali Awadh; Igor, Narozhnyy; Grimaldo Guerrero, John William; alhashim, Hala (MDPI AGSwitzerland, 2022-09-28)

first_pagesettingsOrder Article Reprints Open AccessArticle Application of Neural Network and Dual-Energy Radiation-Based Detection Techniques to Measure Scale Layer Thickness in Oil Pipelines Containing a Stratified ...
Innovative Strategies in agricultural production units: knowledge in development of new services and value chains

Ramírez Molina, Reynier Israel; Pinzon Acosta, Manuela Valentina; Viloria De la Hoz, Keren Daniela; Ríos Pérez, Juan David; LAY, NELSON (Universidad del ZuliaVenezuela, 2023)

The world faces unavoidable challenges that force organizations to undertake actions that solve, mitigate and reverse problems arising from the lack of social, economic and environmental sustainability, with climate change ...
La Psicología: un acercamiento desde la teoría

Ramírez Molina, Reynier Israel; Padrón Molina, María Gabriela; Vergara Ramos, Luis Alfonso; Santamaria Ruiz , Mauricio junior (Fundación Difusión CientíficaVenezuela, 2023-01-02)

El artículo describe la condición científica de la Psicología desde un acercamiento teórico. Se utiliza como método el cualitativo, enfoque pospositivista, paradigma constructivista, técnica la hermenéutica, y para ...
Creativity and problem solving for people management: approaches from the Brian Tracy theory

Ramírez Molina, Reynier Israel; Vergara Ramos, Luis Alfonso; Morrales Charris, Andres Felipe; LAY, NELSON (Fundación Difusión CientíficaVenezuela, 2023-01-02)

The purpose of this study is to describe creativity and problem-solving for people management from Brian Tracy's theory as part of the classroom project "Creativity and problem solving for people management," linking ...
Perspectives of critical epistemology: the fundamental question about a new science

Villalobos Antúnez, José Vicente; Guerrero Lobo, José; Caldera Ynfante, Jesús Enrrique; Ramírez Molina, Reynier Israel (Universidad Católica de ColombiaColombia, 2022)

Many current problems surrounding science revolve around the complex epistemological framework that shapes a new vision of knowledge about reality. The traditional epistemological positions are characterized by the explanation ...
A platform for inpatient safety management based on iot technology

ARRIETA RODRIGUEZ, EUGENIA LUZ; Murillo, Luis; Castañez Orta, Gustavo ; Rivas Horta, Ana Milena; Baldovino Barco, Carlos; Jimenez Barrionuevo, Kelly; Cama-Pinto, Dora; Arrabal Campos, Francisco Manuel; Martínez Lao, Juan Antonio; Cama-Pinto, Alejandro (Multidisciplinary Digital Publishing Institute (MDPI)Switzerland, 2022-12-07)

There is a need to integrate advancements in biomedical, information, and communication technologies with care processes within the framework of the inpatient safety program to support effective risk management of adverse ...
Ingeniería popular: una contribución a la resiliencia para la sostenibilidad en la costa caribe colombiana

TORRES DIAZ, GABRIEL AGENOR; Bracamonte, Miguel; Altahona , Milagro ; Bolaño Melo, luis (Universidad del ZuliaVenezuela, 2022)

La ingeniería popular o vernácula, es considerada un método de construcción que potencialmente puede generar aportes positivos a la crisis ambiental, por tanto, el objetivo de este estudio procura explorar los beneficios ...
La fenomenología como método de investigación científica: una revisión sistemática

NAVARRO YEPES, NORIS ; Arenas Peñaloza, Jhonatan; Linero Racines, Ronald Miguel; Guerrero, Hilda (Universidad del ZuliaVenezuela, 2022-10-10)

El artículo analiza la fenomenología como corriente filosófica y como método de investigación científica. Para lograr tal fin, se realiza un recorrido por su fundación, considerando los principales preceptos de sus ...
Types of competencies of human talent supported by ICT: definitions, elements, and contributions

Santamaria Ruiz, Mauricio Junior; Ramírez Molina, Reynier Israel; Antequera Amaris, Ricardo Romario; Lay Raby, Nelson David (Elsevier BVNetherlands, 2022)

The recent turbulent global changes have highlighted the advancement of generic and technical skills, as responses to the comprehensive challenges of the environment. This is how in the present investigation constructionism ...
Air quality changes during the COVID-19 lockdown in an industrial city in North China: post-pandemic proposals for air quality improvement

Niu, Hongya; Zhang, Chongchong; Hu, Wei; Hu, Tafeng; Wen, Chunmiao; Hu, Sihao; Silva Oliveira, Luis Felipe; Gao, Nana; bao, xiaolei; Fan, Jingsen (MDPI AGSwitzerland, 2022-09-14)

To better understand the changes in air pollutants in an industrial city, Handan, North China, during the COVID-19 lockdown period, the air quality and meteorological conditions were recorded from 1 January to 3 March 2020 ...
Values and administrative practices for generations associated with organizational innovation

Gil Angel, Gustavo Adolfo; Gámez-Gutierrez, Jorge; Calvo, Robinson Ernesto (IGI Global, 2021)

Generational analysis and studies are a recent research trend that analyzes social, cultural, political, and economic changes within the framework of the digital revolution. In this work, an approach is made to the ...
Precision agriculture and sensor systems applications in Colombia through 5G networks

ARRUBLA HOYOS, WILSON DE JESÚS; Ojeda Beltran, Adelaida; Solano-Barliza, Andrés D.; Rambauth-Ibarra, Geovanny; Barrios-Ulloa, Alexis; Cama-Pinto, Dora; Arrabal Campos, Francisco Manuel; Martínez Lao, Juan Antonio; Cama-Pinto, Alejandro; Manzano-Agugliaro, Francisco (Multidisciplinary Digital Publishing Institute (MDPI)Switzerland, 2022-09-26)

The growing global demand for food and the environmental impact caused by agriculture have made this activity increasingly dependent on electronics, information technology, and telecommunications technologies. In Colombia, ...
Large wood debris contributes to beach ecosystems but colombian beachgoer’s do not recognize it

Manzolli, Rogerio Portantiolo; Blanco, David; Portz, Luana; Yanes, Andrea; Zielinski, Seweryn; Ruiz Agudelo, Cesar Augusto; Suarez , Andres (MDPI AGSwitzerland, 2022-07-04)

Large Woody Debris (LWD) accumulation serves essential ecological functions and benefits society’s coastal ecosystems (e.g., beaches). Thus far, the ecosystem services perspective has paid little attention to LWD. Therefore, ...
The economic valuation of ecosystem services in Colombia. Challenges, gaps and future pathways

Ruiz Agudelo, Cesar Augusto; Suarez, Andrés; GUTIÉRREZ BONILLA, FRANCISCO DE PAULA; Cortés-Gómez, Angela M. (Taylor and Francis Ltd.United Kingdom, 2022-10-04)

This paper provides a comprehensive assessment of the economic values for ecosystem services (ESs) in Colombia. Were analyzed 154 studies that estimated economic values for 21 ESs in 18 general ecosystems. In total, 502 ...

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Artículos de investigación publicados por miembros de la comunidad universitaria.

LEER
Statistical-mathematical procedure to determine the cooling distribution of a chiller plant
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Díaz Torres, Yamile | 2022

This paper presents a procedure to determine the cooling capacity distribution of the chillers composing a chiller plant using a statistical analysis of the building cooling demand. The mathematical-statistical procedure uses tools such as frequency histograms, box-and-whisker plots, stem-and-leaf plots, the generalized least squares method, and finally an iterative factorial procedure to generate from the processed information. Besides the manufacturer’s data, all possible chiller plant combinations considering design constraints. The procedure was verified in a hotel facility. Eight thermal demand profiles were simulated. Statistical analysis yielded a range of individual capacities between 100–353 kW. The procedure generated 189 refrigeration plant combinations between 2 to 5 chillers, with a safety factor (SF) between 10%–20%. The highest number of combinations considered plants comprising three and four chillers, reaching 50 and 70 chiller plant options, respectively.

LEER
Evaluation, hierarchy and selection of the best source of energy by using AHP, as a proposed solution to an energy and socio-economic problem, in the case of Colombia’s Pacific zone
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Moreno Rocha, Christian Manuel | 2022-09-27

This research presents the process and the results to weigh and classify a set of criteria and subcriteria to be considered in Renewable Energy Planning projects for a particular area of Colombia. The implementation of electrification programs in the study area faces various obstacles, among them the inadequate selection of criteria and sub-criteria for assessing the relevance and credibility of the implemented projects, which is very important today, causing huge losses from many points of view. It is proposed to implement a multicriteria methodology (MMCM) that prioritizes criteria and subcriteria, the selected methodology is applied to the use of renewable and conventional energy sources in urban, rural,and isolated regions, one of the most used methods in the best selection process and also when making energy decisions. The Hierarchy Analysis Process (AHP) is used, the data is obtained from a survey to a group of experts with a collection and verification period of about 4 months, only to reduce inaccuracies on the developer side. This study explains the results obtained with a new multipurpose support system that helps to prioritize the most appropriate energy decision criteria and subcriteria of energy options to provide sufficient energy to meet local needs and improve living conditions. Based on the literature review, 4 criteria and 16 subcriteria were identified and submitted to review using the AHP methodology (Hierarchical Analysis Process). It can be determined that the most important criterion is the economic, followed by the social, environmental, and technical, and a hierarchy of subcriteria related to each criterion is established, establishing that for the study area the best source of energy is photovoltaic solar by communities.

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Comparative experimental analysis of the fire resistance of sandwich panels with polyisocyanourate core reinforced with fiberglass fabric
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Murillo, Michel | 2022

Sandwich panels are systems with structural functions that are used in the field of civil construction, currently, they are used in the construction of buildings and also as cladding for walls, ceilings, among others. This article shows the results of an experimental comparative analysis of the behavior of fire resistance in two sandwich panels with structural function composed of Polyisocyanurate (PIR) foam core and fiberglass-reinforced fabric of dimensions of 3150 mm × 2800 mm x 150 mm. The first-panel system on its face exposed to fire was coated with plaster plates while the other system with ceramic plates. The parameters subject to comparison for both systems were structural stability, tightness, and thermal insulation. For this, the fire resistance test was carried out evaluating the behavior of each of the Samples subjected to the exposure of the fire to compare with each other. According to the results obtained in this research, the materials used to shape the sandwich panel structure and the coating material influence the results of the parameters and the fire resist the behavior. Thus, in this study the plasterboard-coated system showed better performance against the evaluated parameters and a long time of resistance to fire than that of the ceramic-plated system, checking the thermal insulation benefits and fire protection qualities of the plaster.

LEER
A deep learning model of radio wave propagation for precision agriculture and sensor system in greenhouses
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Cama-Pinto, Dora | 2023-01-13

The production of crops in greenhouses will ensure the demand for food for the world’s population in the coming decades. Precision agriculture is an important tool for this purpose, supported among other things, by the technology of wireless sensor networks (WSN) in the monitoring of agronomic parameters. Therefore, prior planning of the deployment of WSN nodes is relevant because their coverage decreases when the radio waves are attenuated by the foliage of the plantation. In that sense, the method proposed in this study applies Deep Learning to develop an empirical model of radio wave attenuation when it crosses vegetation that includes height and distance between the transceivers of the WSN nodes. The model quality is expressed via the parameters cross-validation, R2 of 0.966, while its generalized error is 0.920 verifying the reliability of the empirical model.

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An analysis of urban block initiatives influencing energy consumption and solar energy absorption
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Acwin Dwijendra, Ngakan Ketut | 2022-11-01

Population growth and urbanization cause developing-country cities to create energy-intensive buildings. Building energy efficiency can be improved through active and passive solar design to reduce energy consumption, increase equipment efficiency, and utilize renewable energy, converting renewable energy into thermal energy or electricity. In this study, passive architecture was evaluated for both urban block and building energy usage. When reliable information and analysis of signs and parameters impacting energy consumption are available, designers and architects can evaluate and passively design a building with higher precision and an accurate picture of its energy consumption in the early stages of the design process. This article compares the location of Baku’s building mass to six climate-related scenarios. Three methodologies are used to determine how much solar energy the models utilize and the difference between annual heating and cooling energy consumption. The structure’s rotation has little effect on the energy utilized in most forms. Only east-west linear designs employ 6 to 4 kWh/m2 of area and are common. Most important is the building’s increased energy consumption, which can take several forms. The building’s westward rotation may be its most important feature. Any westward revolution requires more energy. Building collections together offers many benefits, including the attention designers and investors provide to all places. Having an integrated collection and a sense of community affects inhabitants’ later connections. Dictionary and encyclopedia entries include typology discoveries. These findings will inform future research and investigations. An architect must know a variety of qualities and organizations to define and segregate the environment because architecture relies heavily on the environment. This research involves analyzing the current situation to gain knowledge for future estimations. The present will determine the future.

LEER
Energy simulation and parametric analysis of water cooled thermal photovoltaic systems: energy and exergy analysis of photovoltaic systems
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Candra, Oriza | 2022-11-14

It is generally agreed that solar energy, which can be converted into usable electricity by means of solar panels, is one of the most important renewable energy sources. An energy and exergy study of these panels is the first step in developing this technology. This will provide a fair standard by which solar panel efficiency can be evaluated. In this study, the MATLAB tool was used to find the answers to the math problems that describe this system. The system’s efficiency has been calculated using the modeled data created in MATLAB. When solving equations, the initial value of the independent system parameters is fed into the computer in accordance with the algorithm of the program. A simulation and a parametric analysis of a thermal PV system with a sheet and spiral tube configuration have been completed. Simulations based on a numerical model have been run to determine where precisely the sheet and helical tubes should be placed in a PV/T system configured for cold water. Since then, the MATLAB code for the proposed model has been developed, and it agrees well with the experimental data. There is an RMSE of 0.94 for this model. The results indicate that the modeled sample achieves a thermal efficiency of between 43% and 52% and an electrical efficiency of between 11% and 11.5%.

LEER
Application of neural network and dual-energy radiation-based detection techniques to measure scale layer thickness in oil pipelines containing a stratified regime of three-phase flow
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Mayet, Abdulilah | 2022-09-28

first_pagesettingsOrder Article Reprints Open AccessArticle Application of Neural Network and Dual-Energy Radiation-Based Detection Techniques to Measure Scale Layer Thickness in Oil Pipelines Containing a Stratified Regime of Three-Phase Flow by Abdulilah Mohammad Mayet 1ORCID,Tzu-Chia Chen 2,3,*ORCID,Ijaz Ahmad 4,*,Elsayed Tag Eldin 5ORCID,Ali Awadh Al-Qahtani 1,Igor M. Narozhnyy 6,John William Grimaldo Guerrero 7ORCID andHala H. Alhashim 8 1 Electrical Engineering Department, King Khalid University, Abha 61411, Saudi Arabia 2 College of Management and Design, Ming Chi University of Technology, New Taipei City 243303, Taiwan 3 International College, Krirk University, Bangkok, 3 Ram Inthra Rd, Khwaeng Anusawari, Khet Bang Khen, Krung Thep Maha Nakhon 10220, Thailand 4 Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences (UCAS), Shenzhen 518055, China 5 Electrical Engineering Department, Faculty of Engineering & Technology, Future University in Egypt, New Cairo 11845, Egypt 6 Department of Commercialization of Intellectual Activity Resultse Center for Technology Transfer of RUDN University, Mining Oil and Gas Department, RUDN University, 117198 Moscow, Russia 7 Department of Energy, Universidad de la Costa, Barranquilla 080001, Colombia 8 Department of Physics, College of Science, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia * Authors to whom correspondence should be addressed. Mathematics 2022, 10(19), 3544; https://doi.org/10.3390/math10193544 Received: 3 August 2022 / Revised: 15 September 2022 / Accepted: 17 September 2022 / Published: 28 September 2022 (This article belongs to the Special Issue Application of Artificial Neural Network as Mathematical Tool in Engineering and Management Problems) Download Browse Figures Versions Notes Abstract Over time, oil pipes are scaled, which causes problems such as a reduction in the effective diameter of the oil pipe, an efficiency reduction, waste of energy, etc. Determining the exact value of the scale inside the pipe is very important in order to take timely action and to prevent the mentioned problems. One accurate detection methodology is the use of non-invasive systems based on gamma-ray attenuation. For this purpose, in this research, a scale thickness detection system consisting of a test pipe, a dual-energy gamma source (241Am and 133Ba radioisotopes), and two sodium iodide detectors were simulated using the Monte Carlo N Particle (MCNP) code. In the test pipe, three-phase flow consisting of water, gas, and oil was simulated in a stratified flow regime in volume percentages in the range from 10% to 80%. In addition, a scale with different thicknesses from 0 to 3 cm was placed inside the pipe, and gamma rays were irradiated onto the pipe; on the other side of the pipe, the photon intensity was recorded by the detectors. A total of 252 simulations were performed. From the signal received by the detectors, four characteristics were extracted, named the Photopeaks of 241Am and 133Ba for the first and second detectors. After training many different Multi-Layer Perceptron(MLP) neural networks with various architectures, it was found that a structure with two hidden layers could predict the connection between the input, extracted features, and the output, scale thickness, with a Root Mean Square Error (RMSE) of less than 0.06. This low error value guarantees the effectiveness of the proposed method and the usefulness of this method for the oil and petrochemical industry.

LEER
Innovative Strategies in agricultural production units: knowledge in development of new services and value chains
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Ramírez Molina, Reynier Israel | 2023

The world faces unavoidable challenges that force organizations to undertake actions that solve, mitigate and reverse problems arising from the lack of social, economic and environmental sustainability, with climate change being one of the most pressing. The implementation of new technologies would mean a costly transition, but fundamental and necessary to trace paths that help preserve the planet and the institutions of all kinds that exist in it. The research seeks to describe innovative strategies in agricultural production units as part of the knowledge in the development of new services and value chains. The innovation and adoption of new technologies in processes and consumption patterns will only be possible if companies manage to develop markets that provide in their value offer, the component of environmental sustainability in a transversal way in all their activities. The findings show that the adoption of innovative strategies in agricultural production companies has been slow, so the accompaniment of government entities, civil society organizations, academia, research centers and others is crucial to address these problems and generate strategies to solve them.

LEER
La Psicología: un acercamiento desde la teoría
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Ramírez Molina, Reynier Israel | 2023-01-02

El artículo describe la condición científica de la Psicología desde un acercamiento teórico. Se utiliza como método el cualitativo, enfoque pospositivista, paradigma constructivista, técnica la hermenéutica, y para el análisis de los resultados la interpretación. La Psicología pasó de ser una variable difícil de explicar, a una ciencia independiente, capaz de estudiar la mente y conducta humana, prevaleciendo en ella los registros observables, sus objetivos y técnicas, lo que repercute en su confiabilidad y validación científica

LEER
Creativity and problem solving for people management: approaches from the Brian Tracy theory
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Ramírez Molina, Reynier Israel | 2023-01-02

The purpose of this study is to describe creativity and problem-solving for people management from Brian Tracy's theory as part of the classroom project "Creativity and problem solving for people management," linking students in the framework of classroom processes that strengthen the didactic strategies used by the primary author teacher to ensure learning. With a post-positivist methodological approach, a hermeneutic method with a constructionist perspective, using as a technique and data analysis the interpretation of disciplinary documentary sources of the study variable, both classical and current. It is concluded that contemporary creative efforts by helping to identify problems, think clearly about them, and achieve results, have generated mechanical responses that invite human talent to be problem-solving due to the changing dynamics of the environment. The results show that ideas and skills are guided by creative thinking and developing vitality; these can be developed with practice and tools, and the more focused on solutions, the more integrating intelligence of knowledge and ideas develops.

LEER
Perspectives of critical epistemology: the fundamental question about a new science
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Villalobos Antúnez, José Vicente | 2022

Many current problems surrounding science revolve around the complex epistemological framework that shapes a new vision of knowledge about reality. The traditional epistemological positions are characterized by the explanation of nature by means of concatenated facts; that is, as bricks attached to each other giving shape to the edifice of science. A conception of this nature showed that the idea of certainty was nothing more than a mere illusion, opening the way, on the contrary, to the idea of the uncertainty of knowledge based on the descriptions of quantum physics, also a product of the non-reductionist conception of reality, thus criticizing the specular representation. This article addresses the main problems surrounding the critical conceptions that the emerging epistemology reveals about knowledge, pointing towards a much more complex vision of reality.

LEER
A platform for inpatient safety management based on iot technology
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ARRIETA RODRIGUEZ, EUGENIA LUZ | 2022-12-07

There is a need to integrate advancements in biomedical, information, and communication technologies with care processes within the framework of the inpatient safety program to support effective risk management of adverse events occurring in the hospital environment and to improve inpatient safety. In this respect, this work presents the development of a software platform using the Scrum methodology and the integrated technology of the Internet of Things for monitoring and managing inpatient safety. A modular solution is developed under a hexagonal architecture, using PHP as the backend language through the Laravel framework. A MySQL database was used for the data layer, and Vue.js was used for the user interface. This work implemented an RFID-based nurse call system using Internet of Things (IoT) concepts. The system enables nurses to respond to each inpatient within a given time limit and without the inpatient or a family member having to approach the nursing station. The system also provides reports and indicators that help evaluate the quality of inpatient care and helps to take measures to improve inpatient safety during care. In addition, diet management is integrated to reduce the occurrence of adverse events. A LoRa and Wi-Fi-based IoT network was implemented using a LoRa transceiver and the ESP32 MCU, chosen for its low power consumption, low cost, and wide availability. Bidirectional communication between hardware and software is handled through an MQTT Broker. The system integrates temperature and humidity sensors and smoke sensors, among others.

LEER
Ingeniería popular: una contribución a la resiliencia para la sostenibilidad en la costa caribe colombiana
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TORRES DIAZ, GABRIEL AGENOR | 2022

La ingeniería popular o vernácula, es considerada un método de construcción que potencialmente puede generar aportes positivos a la crisis ambiental, por tanto, el objetivo de este estudio procura explorar los beneficios de las acciones de este método, para generar resiliencia que contribuya a convertir los espacios urbanos y rurales de la costa caribeña colombiana en territorios sostenibles. Los resultados muestran las interrelaciones existentes entre los constructos de hábitats en base a ingeniería popular, con los sistemas socio ecológicos propios de la región del Caribe colombiano, donde los factores culturales, étnicos y bioclimáticos son de influencia determinante como característica para generar resiliencia en pro de la sostenibilidad. La metodología empleada es la investigación cualitativa-fenomenológica, a partir del análisis de documentos desde un enfoque hermenéutico de los referentes teóricos indizados en la base de datos Scopus-Elsevier, así como investigaciones arbitradas en otras plataformas de almacenamiento de literatura.

LEER
La fenomenología como método de investigación científica: una revisión sistemática
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NAVARRO YEPES, NORIS | 2022-10-10

El artículo analiza la fenomenología como corriente filosófica y como método de investigación científica. Para lograr tal fin, se realiza un recorrido por su fundación, considerando los principales preceptos de sus precursores, tales como Edmund Husserl y Martin Heidegger, acerca de la manera de comprenderse y percibirse los fenómenos. Al mismo tiempo, se presenta un análisis de contenido mediado por la revisión sistemática de las investigaciones que se han realizado en el último año a través del empleo de la fenomenología como problema o método de investigación, tomando en cuenta las principales disciplinas, áreas temáticas y aportes que se han hecho a la investigación científica.

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Types of competencies of human talent supported by ICT: definitions, elements, and contributions
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Santamaria Ruiz, Mauricio Junior | 2022

The recent turbulent global changes have highlighted the advancement of generic and technical skills, as responses to the comprehensive challenges of the environment. This is how in the present investigation constructionism and hermeneutics are used as a methodology to achieve contributions of scientific rigor, conceptualizing the variables; with a positivist approach, using literary study, to generate theoretical reflections based on contemporary and disciplinary foundations, and thus understand literature, build concepts, and generate reflections. The findings show that ICT-focused skills condition the employability of human talent and its effect on resources, elements, and capabilities in generating value. It is concluded that the generic and specific skills of people currently prevail as indicators of achievement, resulting in the actions performed and sustainability.

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Air quality changes during the COVID-19 lockdown in an industrial city in North China: post-pandemic proposals for air quality improvement
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Niu, Hongya | 2022-09-14

To better understand the changes in air pollutants in an industrial city, Handan, North China, during the COVID-19 lockdown period, the air quality and meteorological conditions were recorded from 1 January to 3 March 2020 and the corresponding period in 2019. Compared to the corresponding period in 2019, the largest reduction in PM2.5–10, PM2.5, NO2 and CO occurred during the COVID-19 lockdown period. PM2.5–10 displayed the highest reduction (66.6%), followed by NO2 (58.4%) and PM2.5 (50.1%), while O3 increased by 13.9%. Similarly, compared with the pre-COVID-19 period, NO2 significantly decreased by 66.1% during the COVID-19 lockdown, followed by PM2.5–10 (45.9%) and PM2.5 (42.4%), while O3 increased significantly (126%). Among the different functional areas, PM2.5 and PM2.5–10 dropped the most in the commercial area during the COVID-19 lockdown. NO2 and SO2 decreased the most in the traffic and residential areas, respectively, while NO2 increased only in the township and SO2 increased the most in the industrial area. O3 increased in all functional areas to different extents. Potential source contribution function analysis indicated that not only the local air pollution lessened, but also long-distance or inter-regional transport contributed much less to heavy pollution during the lockdown period. These results indicate that the COVID-19 lockdown measures led to significantly reduced PM and NO2 but increased O3 , highlighting the importance of the synergetic control of PM2.5 and O3 , as well as regional joint prevention and the control of air pollution. Moreover, it is necessary to formulate air pollution control measures according to functional areas on a city scale.

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Values and administrative practices for generations associated with organizational innovation
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Gil Angel, Gustavo Adolfo | 2021

Generational analysis and studies are a recent research trend that analyzes social, cultural, political, and economic changes within the framework of the digital revolution. In this work, an approach is made to the generational phenomena in the SMEs. The objective is to identify the correlations between entrepreneurship and management operations from the logic of individual values and the practices of SMEs managers and owners in Bogotá, from the Blackman model, according to their correspondence with the generational classification taking into account your date of birth. The sample is 383 entrepreneurs from Bogotá, and it was found that there are significant differences associated with generations in skills and abilities, risk management, honesty, responsibility, and work in the provision of services and facilities.

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Precision agriculture and sensor systems applications in Colombia through 5G networks
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ARRUBLA HOYOS, WILSON DE JESÚS | 2022-09-26

The growing global demand for food and the environmental impact caused by agriculture have made this activity increasingly dependent on electronics, information technology, and telecommunications technologies. In Colombia, agriculture is of great importance not only as a commercial activity, but also as a source of food and employment. However, the concept of smart agriculture has not been widely applied in this country, resulting in the high production of various types of crops due to the planting of large areas of land, rather than optimization of the processes involved in the activity. Due to its technical characteristics and the radio spectrum considered in its deployment, 5G can be seen as one of the technologies that could generate the greatest benefits for the Colombian agricultural sector, especially in the most remote rural areas, which currently lack mobile network coverage. This article provides an overview of the current 5G technology landscape in Colombia and presents examples of possible 5G/IoT applications that could be developed in Colombian fields. The results show that 5G could facilitate the implementation of the smart farm in Colombia, improving current production and efficiency. It is useful when designing 5G implementation plans and strategies, since it categorizes crops by regions and products. This is based on budget availability, population density, and regional development plans, among others.

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Large wood debris contributes to beach ecosystems but colombian beachgoer’s do not recognize it
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Manzolli, Rogerio Portantiolo | 2022-07-04

Large Woody Debris (LWD) accumulation serves essential ecological functions and benefits society’s coastal ecosystems (e.g., beaches). Thus far, the ecosystem services perspective has paid little attention to LWD. Therefore, we aim to contrast social perceptions on LWD and its ecological significance in Puerto Velero beach, Caribbean, Colombia. In consequence, the contribution of LWD to the conformation and creation of Puerto Velero beach was analyzed, as well as how beachgoers perceive the importance of LWD and if they were willing to pay to remove LWD in this beach. To achieve this, a quantitative convergent approach was then proposed using GIS analysis and remote sensing to understand the contributions of LWD to the Puerto Velero beach ecosystem; and in addition, a survey was performed to determine how beachgoers perceived LWD and how they valued the phenomenon. Results indicate that LWD contributed to beach maintenance; nevertheless, most people neglected LWD values because of its lack of visual attractiveness. As such, ecosystem services targets become conflicted because people positively perceived ecosystem services provided by beaches, but they did not assign importance to the beach dynamics they deemed unattractive, regardless of their vast importance.

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The economic valuation of ecosystem services in Colombia. Challenges, gaps and future pathways
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Ruiz Agudelo, Cesar Augusto | 2022-10-04

This paper provides a comprehensive assessment of the economic values for ecosystem services (ESs) in Colombia. Were analyzed 154 studies that estimated economic values for 21 ESs in 18 general ecosystems. In total, 502 values were coded and classified according to the Common International Classification of Ecosystem Services – CICES. Despite being a technique that is not based on primary economic valuation information, Benefits transfer was the most common method used to estimate the value of ESs in Colombia, followed by market prices and contingent valuation. Opportunities for recreation and tourism, climate regulation, habitat conservation, and water have been the most valued ESs. Many important ESs remain unnoticed and are not adequately accounted (e.g. pollination). Additionally, 53% of the information available on the economic values of ESs is concentrated in only 5 of the 32 Colombian departments. Finally, this review highlights the multiple challenges of Colombian academics and practitioners to improve the economic valuation practice and complement and recognize the multiple social relationships and the multiple views in terms of the values nature has.

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Statistical-mathematical procedure to determine the cooling distribution of a chiller plant ﻿

Evaluation, hierarchy and selection of the best source of energy by using AHP, as a proposed solution to an energy and socio-economic problem, in the case of Colombia’s Pacific zone ﻿

Comparative experimental analysis of the fire resistance of sandwich panels with polyisocyanourate core reinforced with fiberglass fabric ﻿

A deep learning model of radio wave propagation for precision agriculture and sensor system in greenhouses ﻿

An analysis of urban block initiatives influencing energy consumption and solar energy absorption ﻿

Energy simulation and parametric analysis of water cooled thermal photovoltaic systems: energy and exergy analysis of photovoltaic systems ﻿

Application of neural network and dual-energy radiation-based detection techniques to measure scale layer thickness in oil pipelines containing a stratified regime of three-phase flow ﻿

Innovative Strategies in agricultural production units: knowledge in development of new services and value chains ﻿

La Psicología: un acercamiento desde la teoría ﻿

Creativity and problem solving for people management: approaches from the Brian Tracy theory ﻿

Perspectives of critical epistemology: the fundamental question about a new science ﻿

A platform for inpatient safety management based on iot technology ﻿

Ingeniería popular: una contribución a la resiliencia para la sostenibilidad en la costa caribe colombiana ﻿

La fenomenología como método de investigación científica: una revisión sistemática ﻿

Types of competencies of human talent supported by ICT: definitions, elements, and contributions ﻿

Air quality changes during the COVID-19 lockdown in an industrial city in North China: post-pandemic proposals for air quality improvement ﻿

Values and administrative practices for generations associated with organizational innovation ﻿

Precision agriculture and sensor systems applications in Colombia through 5G networks ﻿

Large wood debris contributes to beach ecosystems but colombian beachgoer’s do not recognize it ﻿

The economic valuation of ecosystem services in Colombia. Challenges, gaps and future pathways ﻿

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Artículos científicos

Statistical-mathematical procedure to determine the cooling distribution of a chiller plant

Evaluation, hierarchy and selection of the best source of energy by using AHP, as a proposed solution to an energy and socio-economic problem, in the case of Colombia’s Pacific zone

Comparative experimental analysis of the fire resistance of sandwich panels with polyisocyanourate core reinforced with fiberglass fabric

A deep learning model of radio wave propagation for precision agriculture and sensor system in greenhouses

An analysis of urban block initiatives influencing energy consumption and solar energy absorption

Energy simulation and parametric analysis of water cooled thermal photovoltaic systems: energy and exergy analysis of photovoltaic systems

Application of neural network and dual-energy radiation-based detection techniques to measure scale layer thickness in oil pipelines containing a stratified regime of three-phase flow

Innovative Strategies in agricultural production units: knowledge in development of new services and value chains

La Psicología: un acercamiento desde la teoría

Creativity and problem solving for people management: approaches from the Brian Tracy theory

Perspectives of critical epistemology: the fundamental question about a new science

A platform for inpatient safety management based on iot technology

Ingeniería popular: una contribución a la resiliencia para la sostenibilidad en la costa caribe colombiana

La fenomenología como método de investigación científica: una revisión sistemática

Types of competencies of human talent supported by ICT: definitions, elements, and contributions

Air quality changes during the COVID-19 lockdown in an industrial city in North China: post-pandemic proposals for air quality improvement

Values and administrative practices for generations associated with organizational innovation

Precision agriculture and sensor systems applications in Colombia through 5G networks

Large wood debris contributes to beach ecosystems but colombian beachgoer’s do not recognize it

The economic valuation of ecosystem services in Colombia. Challenges, gaps and future pathways