Dyna最新文献

{"title":"RISK FAILURE REDUCTION IN 3D PRINTER THROUGH SECUENTIAL USE OF DFMEA, FAULT TREE AND BAYESIAN NETWORKS","authors":"Secundino RAMOS LOZANO, Manuel Arnoldo RODRIGUEZ MEDINA, Ericka Berenice HERRERA RIOS, Eduardo Rafael POBLANO OJINAGA","doi":"10.6036/10794","DOIUrl":"https://doi.org/10.6036/10794","url":null,"abstract":"The need to manufacture reliable devices, which include features that guarantee good performance and do not cause problems for the end user, is of paramount importance for manufacturers. To meet this objective, it is necessary to perform a thorough analysis of the devices to identify potential failure events in order to be able to take actions to reduce their risk of occurrence and increase the reliability and quality of the device. This research paper presents an effective tool for the detection from the design of possible failures in the devices, which allows actions to be taken for their correction in early stages. This analysis methodology combines several advanced fault analysis techniques, such as DFMEA, Fault Tree, and Bayesian networks, making the process of analyzing, detecting and correcting potential device failures more efficient. This methodology is applied to the analysis of a commercial 3D printer that uses fused filament deposition technology model Anet A8, making a preliminary filter using a DFMEA for subsequent analysis fault tree and Bayesian network managing to determine the probability of occurrence of 3D printing failures, this allows to take actions and establish priorities of corrective actions focused on reducing the risk of failure based on its probability of occurrence.\u0000Keywords: DFMEA, Fault tree, Bayesian Network, 3D printing, Fault probability","PeriodicalId":11386,"journal":{"name":"Dyna","volume":"47 12","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139454816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"METHODOLOGY FOR INTELLIGENT PLASTIC INJECTION POINT LOCATION BASED ON GEOMETRIC ALGORITHMS AND DISCRETE TOPOLOGIES FOR VIRTUAL DIGITAL TWIN ENVIRONMENTS","authors":"Cristina MARTIN DOÑATE, Jorge Manuel MERCADO COLMENERO, Abelardo TORRES ALBA","doi":"10.6036/11004","DOIUrl":"https://doi.org/10.6036/11004","url":null,"abstract":"Implementing intelligent design models can revolutionize the use of digital twins, which are crucial in product design by incorporating intelligent algorithms. This perspective is especially important for the design of injection-molded plastic parts, a complex process that often requires expert knowledge and costly simulation software not available to all companies. This article presents an innovative methodology for locating injection points in injection-molded parts using intelligent models with geometric algorithms for discrete topologies. The first algorithm calculates the center of mass of the discrete model based on the center of mass of each triangular facet in the system, ensuring uniform molten plastic distribution during mold cavity filling. Two sub-algorithms intelligently evaluate the geometry and optimal injection point location. The first sub-algorithm generates a geometric matrix based on a two-dimensional nodal quadrature adapted to the part's bounding box. The second sub-algorithm projects the nodal matrix and associated circular areas orthogonally on the part's surface along the demolding direction. The optimal injection point location is determined by minimizing the distance to the center of mass from the first algorithm's result. This novel methodology has been validated through rheological simulations in six case studies with complex geometries. The results demonstrate uniform and homogeneous molten plastic distribution with minimal pressure loss during the filling phase. Importantly, this methodology does not require expert intervention, reducing time and costs associated with manual injection mold feed system design. It is also adaptable to various design environments and virtual twin systems, not tied to specific CAD software. The validated results surpass the state of the art, offering an agile alternative for digital twin applications in new product design environments, reducing dependence on experts, facilitating designer training, and ultimately cutting costs\u0000Keywords: Injection Moulding, Product Design, Industrial Design, Geometrical Algorithms, Digital Twin","PeriodicalId":11386,"journal":{"name":"Dyna","volume":"70 S1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139396021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RECONSTRUCTION OF THE CORNEAL SURFACE OF THE HUMAN EYE USING A COMPUTATIONAL EVOLUTIONARY ALGORITHM. PRACTICAL APPLICATION IN NON-PATHOLOGICAL CASES","authors":"Francisco CAVAS MARTINEZ, Francisco Luis SAEZ GUTIERREZ, José Sebastián VELÁZQUEZ BLÁZQUEZ, Jorge L. Alió, J. L. Alio del Barrio","doi":"10.6036/10998","DOIUrl":"https://doi.org/10.6036/10998","url":null,"abstract":"Increasingly, the use of geometric modelling techniques in Applied Ophthalmology is significant in the characterization of important pathologies of the cornea, such as Keratoconus. This article presents a novel method for the geometric reconstruction of the corneal surface from optical topography using a genetic algorithm. Traditionally, mathematical programming methods such as the least squares method have been used to obtain the coefficients of the corneal surface function, such as Navarro model or Zernike polynomials. This new method uses non-dominated multivariable genetic algorithm optimization to obtain the surface function coefficients from the point cloud obtained with corneal topographer device. Once the reconstruction is performed, the surface is represented using CAD software, and morphogeometric parameters are obtained. The experimental sample consisted in 33 healthy patients eyes, aged from 11 to 63, and without previous ocular surgeries or pathologies. Topographic data were obtained using a Scheimpflug Sirius tomographer (CSO, Italy). The computational optimization was executed under Matlab software environment (Mathworks, USA). The new method provides a lower mean squared error (MSE) than those obtained by the least squares or the nonlinear programming algorithms. Thus, the morphogeometric parameters obtained from the patient's corneas fit better, allowing for a better analysis of real clinical conditions.","PeriodicalId":11386,"journal":{"name":"Dyna","volume":"25 3","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139455193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THERMOGRAPHIC COMPARATIVE STUDY USING SMARTPHONE AND CAMERA TECHNOLOGY IN BUILDINGS","authors":"Jose Antonio ALONSO RODRIGUEZ, Jesus BALADO FRIAS, José Luis GONZÁLEZ CESPÓN, Lucia DIAZ VILARIÑO","doi":"10.6036/11002","DOIUrl":"https://doi.org/10.6036/11002","url":null,"abstract":"The cost of thermographic cameras has significantly decreased in recent years, making it an accessible and cost-effective solution for building and infrastructure inspection. With advancements in technology, low-cost thermographic devices have now become readily available in the market. These cost-effective devices offer a more convenient and accessible option for individuals and businesses to perform onsite temperature measurements. In this paper, we examine the capabilities and limitations of a thermal-equipped smartphone and the potential impact on the thermography industry by comparison with a dedicated thermographic camera. The advantages of thermography still hold true for recent low-cost devices: non-invasive inspections, quick and efficient measurements, and hidden defects easily detected. The low-cost thermal-equipped smartphone proved to be a highly maneuverable system, easy to use and with option of overlapping with real color image, what facilitates the interpretation. The low-cost system is also characterized by a larger field of view but also by a lower resolution, what makes it impracticable for measuring small objects. In any case, integration of non-destructive technologies in smartphones opens up a whole new world of possibilities for spreading the inspection of as-built buildings and infrastructures and democratizing the technology.\u0000Keywords: Low-Cost; inspection; thermal bridges; energy sustainability; energy efficiency; digital twins.","PeriodicalId":11386,"journal":{"name":"Dyna","volume":"220 5","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139395300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INTUITIONISTIC ROBUST CLUSTERING FOR SEGMENTATION OF LESIONS IN DERMATOSCOPIC IMAGES","authors":"Celia RAMOS PALENCIA, Dante Mújica Vargas, Jean Marie Vianney KINANI KINANI, Antonio LUNA ALVAREZ, Noé Alejandro Castro Sánchez","doi":"10.6036/10787","DOIUrl":"https://doi.org/10.6036/10787","url":null,"abstract":"This paper presents the formulation of the intuitive fuzzy clustering algorithm to be robust to atypical data present in dermoscopic images and to delimit the affected area. This algorithm is formulated from the objective function derivation for memberships update, to integrate an m-redescending estimator influence function. Experimentation shows an accuracy of 95% with the proposal algorithm with respect to other clustering algorithms to perform delimitations, in addition the iterations number is considerably reduced.\u0000Keywords: Robust Intuitionistic Fuzzy Clustering, Dermoscopic Images, Delimitations of Lesions, M-redescending Estimator","PeriodicalId":11386,"journal":{"name":"Dyna","volume":"1 9","pages":""},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139391644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"NATURAL CROSS VENTILATION CLASSROOMS: CO2 AND PROTECTION AGAINST PANDEMICS","authors":"Juan FRANQUELO SOLER, Francisco Javier SOTO LARA, Elidia Beatriz BLÁZQUEZ PARRA, Oscar DE COZAR MACIAS, M. D. Marín Granados","doi":"10.6036/10906","DOIUrl":"https://doi.org/10.6036/10906","url":null,"abstract":"La ventilación natural cruzada es considerada una estrategia efectiva y sostenible frente a pandemias respiratorias en espacios confinados. La entrada de aire en un aula, a través de puertas y ventanas, mejora la calidad del aire interior (Indoor Air Quality - IAQ), disminuye la transmisión de enfermedades respiratorias con una distancia social adecuada (1.5 m), siendo accesible en términos de consumo energético. En este estudio se realiza una comparación entre tipos de ventilación cruzada, a partir de la concentración de CO2, número de personas y superficies de ventilación de ventanas y puertas de un centro universitario en un clima mediterráneo. Se midieron los niveles de CO2 en dos aulas similares y anexas, con diferentes aperturas de ventanas y puertas (0%, 33% y 66%) con 2 secuencias de carga y descarga. Se analizaron dos tipos de ventilación cruzada: ventilación cruzada con ventana y puerta en la misma dirección o directa (CDIR), y ventilación cruzada en diagonal (CDIA), en un período de tiempo de 3 h. en diciembre de 2022. Los resultados muestran una interacción entre los niveles de CO2 y el tipo de ventilación. La ventilación cruzada diagonal fue más efectiva en términos de renovaciones de aire (ACH) que la directa, en rangos de apertura menores (33%), siendo la ventilación cruzada directa más efectiva globalmente y en rangos de apertura mayores (66%), en las condiciones de este estudio de caso.","PeriodicalId":11386,"journal":{"name":"Dyna","volume":"42 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138600496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"BUILDING SUSTAINABILITY: MULTIDISCIPLINARY CONTRIBUTION FROM THE UNIVERSITY","authors":"Elisabete ALBERDI CELAYA, Irantzu Álvarez González, Maria Isabel Eguia, Aitor GOTI ELORDI, Jesus Maria Hernandez Vazquez, X. Oregi, Heriberto PEREZ ACEBO, Amaia Santamaría León, Nagore Urrutia","doi":"10.6036/11019","DOIUrl":"https://doi.org/10.6036/11019","url":null,"abstract":"The university, due to its work in the generation and dissemination of knowledge, is a very relevant part of the development of the SDGs. The Civil Engineering and Fundamentals of Architecture degrees play a key role in contributing to sustainability through the development of skills aimed at proper environmental management and administration of natural resources in accordance with them. This article shows the development and application of an initiative to increase the mastery of competences related to sustainability in different subjects of their study plan. The approach includes a framework with actions carried out both in regular subjects and in end-of-degree projects. Didactic activities have been designed using different methodologies and students have been involved in their learning process, bringing them closer to the real world from an environmental and sustainable perspective.\u0000Keywords: Sustainable Development Goals (SDGs), Project-Based Learning, competence-based approach, university.","PeriodicalId":11386,"journal":{"name":"Dyna","volume":"17 10","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138602809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INTELLIGENT MODULAR CHILDREN'S FURNITURE DESIGN","authors":"Ana DE LAS HERAS, Lidia RODRIGUEZ RAMIREZ, Francisco Zamora Polo, Antonio CORDOBA ROLDAN","doi":"10.6036/11017","DOIUrl":"https://doi.org/10.6036/11017","url":null,"abstract":"Nowadays, the digitisation of products occupies a very significant space in the product market, as incorporating new functionalities means satisfying new needs for users. Likewise, there is a debate between the programmed obsolescence of products that use technology within their useful life. This work aims to connect the benefits provided by technology within products by projecting a proposal that has a longer useful life thanks to the adaptation of the product to the user. It deals with the design of children's furniture, an intelligent cot, which adjusts to the needs of the first stage of life by including sensors and components that improve the baby's rest, and which, in turn, incorporates modularity in its design to be able to adapt to the following stages of the child's life up to the age of 12. The proposed methodology incorporates a series of methods and techniques that provide a 5-phase structure that includes a group of experts who work transversally in the product design process to strengthen decision-making and prioritisation of the needs raised. Several alternatives are developed and, thanks to the evaluation based on the needs extracted at the beginning of the process together with the design requirements, the one that best satisfies both areas is chosen. Key Words: Product design, Modularity, Children's furniture, Adaptable design, Smart Childcare","PeriodicalId":11386,"journal":{"name":"Dyna","volume":"56 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139211194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ALGAE-BASED BIODEGRADABLE ECO-FRIENDLY FOOD PACKAGING DESIGN: A CASE-CONTROL STUDY WITH THERMOFORMING PROCESS","authors":"Lucia RODRIGUEZ PARADA, Sofia TRISTANCHO RUIZ, Victor Manuel PEREZ IGNACIO, P. F. MAYUET ARES, Maria Del Rocio RODRIGUEZ BARROSO, Luis López Molina","doi":"10.6036/11005","DOIUrl":"https://doi.org/10.6036/11005","url":null,"abstract":"One of the challenges currently facing the agrifood industry is the promotion of eco-design to reduce the environmental impact of agro-industrial products during their life cycle. This requires the design of new products or the redesign of existing ones, both in the choice of raw materials and in the design of the manufacturing process, including distribution, use, recovery or final disposal. The aim of the present study is to investigate the behaviour of the algae-based beta-material created by the thermoforming process, as well as to design the selected packaging for this study. The results provide important and relevant information for the design and development of sustainable packaging with the material still under development. Keywords: Packaging design; eco-friendly packaging; sustainability; thermoforming; algae-based material","PeriodicalId":11386,"journal":{"name":"Dyna","volume":"70 ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139243729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"METHODOLOGICAL DEVELOPMENT OF PERSONALIZED ORTHOPEDIC SPLINTS THROUGH LOW-COST ADDITIVE MANUFACTURING","authors":"Pablo Ruben BORDON PEREZ, Alberto Javier Cuadrado Hernández, Ruben PAZ HERNANDEZ, Alvaro NAVARRO GONZALEZ, Mario MONZON VERONA, Yamilet Rivero López, Carlos Joshua García Montagut, Manuel Alejandro Yánez Santana, Juan RUIZ ALZOLA","doi":"10.6036/11081","DOIUrl":"https://doi.org/10.6036/11081","url":null,"abstract":"Orthopedic splints are widely used to immobilize parts of the body during the recovery from bone injuries, surgeries, or post-traumatic recovery. In the medical field, there are two main types of splints: the rigid and disposable ones made of plaster, and the non-disposable but detachable ones, typically made up of metallic and polymeric components. Rigid splints are economical and can be quickly applied, but they have limitations in terms of weight, ventilation, and comfort, and also require medical staff intervention for their removal. On the other hand, detachable splints offer greater comfort and breathability, but they are more expensive and their fit to the patient is less accurate. This work presents the development of personalized orthopedic splints, lighter and more breathable, at a reasonable cost and production time. To achieve this, a methodology is proposed that includes an economical scanning of the area to be immobilized, an accessible and efficient digital design, and its production using MEX additive manufacturing technology, meeting the necessary mechanical requirements for immobilization and stiffness, based on finite element simulations. This proposal is presented as an alternative to conventional splints, offering improved performance thanks to affordable and low-cost additive manufacturing technologies.","PeriodicalId":11386,"journal":{"name":"Dyna","volume":"63 2","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139253454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}