The pipelines and cable trays location problem in naval design

The authors of this research acknowledge financial support by the Spanish Ministerio de Ciencia y Tecnología, Agencia Estatal de Investigación, and Fondos Europeos de Desarrollo Regional (FEDER) via project PID2020-114594GB-C21. The authors also acknowledge partial support from projects: FEDER-US-1256951; Junta de Andalucía, Spain P18-FR-1422; CEI-3-FQM331; B-FQM-322-UGR20; AT 21_00032; NetmeetData: Ayudas Fundación BBVA a equipos de investigación científica 2019; Contratación de Personal Investigador Doctor (Convocatoria 2019) 43 Contratos Capital Humano Línea 2. Paidi 2020, supported by the European Social Fund and Junta de Andalucía; UE-NextGenerationEU (ayudas de movilidad para la recualificación del profesorado universitario); VII PPIT-US (Ayudas Estancias Breves, Modalidad A); and the IMAG-Maria de Maeztu grant CEX2020-001105-M /AEI /10.13039/501100011033.This paper deals with the determination of optimal locations for pipelines and cable trays in naval design. The problem consists of finding the number and types of cable tray routes to be created between various devices in order to minimize a user defined cost function. We reduce the problem to an ad hoc min-cost multicommodity flow problem with additional constraints imposed by technical requirements. This problem is solved for small-sized instances by using off-the-shelf optimization solvers. We also develop an exact relax-and-cut strategy that allows to handle medium-sized instances. For larger instances, we propose a family of heuristic algorithms consisting on the combination of two phases: (I) Construction of initial cable trays paths; and (II) Transformation to feasible cable trays verifying the technical requirements. For each of them, we also propose different strategies which give rise to several algorithms. These algorithms are compared on a computational experience using two types of instances: the first one based on random instances of different sizes and the second one based on instances with well-defined corridors to asses the availability of our methodology to enforce the creation of cable trays. Finally, we also analyze a real size case study provided by our industrial partner, Ghenova, a leading Naval Engineering company, validating our proposal to find solutions for this problem.IMAG-Maria de Maeztu CEX2020-001105-M /AEI /10.13039/501100011033Spanish Ministerio de Ciencia TecnologíaUE-NextGenerationEUEuropean Social Fund ESFMinisterio de Ciencia y Tecnología MICYTEuropean Regional Development Fund FEDER-US-1256951, PID2020-114594GB-C21 ERDFJunta de Andalucía AT 21_00032, B-FQM-322-UGR20, CEI-3-FQM331, P18-FR-1422Agencia Estatal de Investigación AE

High School Location and Video Games Use

Ponencia presentada en el XVI Congreso Internacional Gallego-Português de Psicopedagogía, realizado en la Universidade do Minho, en Braga (Portugal), los dias 1 a 3 de septiembre de 2021, con el patrocinio de la Associación Científica Internacional de Psicopedagogía (ACIP)[Resumen] El presente estudio pretende conocer si la ubicación del centro educativo al que acuden los adolescentes determina el uso de videojuegos de esta población. Este trabajo se integra dentro de una investigación de carácter cuantitativo de tipo descriptivo, que cuenta con una muestra total de 708 adolescentes cursando o bien educación secundaria o bachillerato en el momento de la recolección de datos, con edades comprendidas entre los 12 y los 18 años (M: 13.81; DT: 1.25). Se utilizó un cuestionario con ítems de variables personales, académicas y uso de videojuegos. Los resultados obtenidos muestran que aquellos jóvenes que acuden a un centro urbano refieren que los videojuegos son la principal ocupación de su tiempo libre en mayor medida que los que acuden a centros rurales. El primer colectivo refiere tanto más años dedicados como más horas invertidas a este tipo de divertimento, especialmente durante la semana lectiva. En lo referente a la plataforma preferida de juego, emergen preferencias similares, ocupando el primer lugar el móvil o Tablet y la consola conectada a televisión. Finalmente, los jóvenes rurales prefieren hacer uso del videojuego Among Us, mientras que los urbanos, Fortnite, mostrando ambos grupos gran preferencia por juegos online multijugador. A modo de conclusión, es interesante contrastar datos sobre uso de videojuegos en población rural y urbana para conocer cómo se interrelacionan dos realidades actuales: por un lado, la expansión paulatina del mundo de videojuego, y, por el otro, la realidad de la brecha digital entre los ámbitos urbano y rural.[Abstract] The aim of the present study is to know whether or not the location of the high school determines in any form the way teenagers use this kind of entertainment. This paper is integrated within a larger quantitative descriptive research, with a sample of 708 teenagers who were studying secondary education or higher in high schools, with ages between 12 and 18 years old (M: 13.81; TD: 1.25) A questionnaire of items about personal, academic, and video game use variables was used.The results show that playing video games is the first leisure choice for urban schoolers more often than for rural schoolers. The first group also reports more years in their history of playing with these games, and more hours dedicated to them, especially during the week from Monday to Friday. About the preferred platform, both urban and rural group show similar preferences, such as mobile phones or tablets and consoles with TV connection. Finally, rural adolescents preferplaying the video game Among Us, while urban ones prefer a more violent title like Fortnite, showing both groups preference for multiplayer online games.Studying this kind of social themes could be quite interesting because it confronts two current social realities: in one hand, the relentless video game industry expansion, and on the other, the digital breach between rural and urban spaces

Immunolocalization of VEGF-A and orosomucoid-1 in odontogenic myxoma

OBJECTIVE:The aim of the present study was to determine and establish the immunohistochemical distribution of VEGF-A and ORM-1 protein in odontogenic myxomas to suggest a possible function in the biological behavior of odontogenic myxomas.MATERIALS AND METHODS:A total of 33 odontogenic myxoma cases and three tooth germs were included. Immunohistochemistry was performed to localize VEGF-A and ORM-1 proteins in tumor cells, endothelial cells and extracellular matrix in the odontogenic myxomas. The intratumoral microvessel density (MVD) was determined with CD34 and Factor VIII antibodies.RESULTS:Immunopositivity was strong in the endothelial cells, which compose various vessels, and in the randomly oriented stellate, spindle-shaped and round tumoral cells with long cytoplasmic processes. More than half of the extracellular matrix lacked expression of VEGF-A. ORM-1 expression was strong in both endothelial cells and tumor cells, and the myxoid extracellular matrix was positive, with moderate or strong immunoexpression in all cases. An important finding of this study was the statistically significant positive correlation between the expression of ORM-1 and VEGF-A in tumor cells (p=0.02).CONCLUSIONS:The results of this study suggest that the expression of VEGF-A and ORM-1 may be associated with two mechanisms (angiogenesis and tumor structural viscosity) that may influence tumor growth in odontogenic myxomaOBJECTIVE:The aim of the present study was to determine and establish the immunohistochemical distribution of VEGF-A and ORM-1 protein in odontogenic myxomas to suggest a possible function in the biological behavior of odontogenic myxomas.MATERIALS AND METHODS:A total of 33 odontogenic myxoma cases and three tooth germs were included. Immunohistochemistry was performed to localize VEGF-A and ORM-1 proteins in tumor cells, endothelial cells and extracellular matrix in the odontogenic myxomas. The intratumoral microvessel density (MVD) was determined with CD34 and Factor VIII antibodies.RESULTS:Immunopositivity was strong in the endothelial cells, which compose various vessels, and in the randomly oriented stellate, spindle-shaped and round tumoral cells with long cytoplasmic processes. More than half of the extracellular matrix lacked expression of VEGF-A. ORM-1 expression was strong in both endothelial cells and tumor cells, and the myxoid extracellular matrix was positive, with moderate or strong immunoexpression in all cases. An important finding of this study was the statistically significant positive correlation between the expression of ORM-1 and VEGF-A in tumor cells (p=0.02).CONCLUSIONS:The results of this study suggest that the expression of VEGF-A and ORM-1 may be associated with two mechanisms (angiogenesis and tumor structural viscosity) that may influence tumor growth in odontogenic myxomaOBJECTIVE:The aim of the present study was to determine and establish the immunohistochemical distribution of VEGF-A and ORM-1 protein in odontogenic myxomas to suggest a possible function in the biological behavior of odontogenic myxomas.MATERIALS AND METHODS:A total of 33 odontogenic myxoma cases and three tooth germs were included. Immunohistochemistry was performed to localize VEGF-A and ORM-1 proteins in tumor cells, endothelial cells and extracellular matrix in the odontogenic myxomas. The intratumoral microvessel density (MVD) was determined with CD34 and Factor VIII antibodies.RESULTS:Immunopositivity was strong in the endothelial cells, which compose various vessels, and in the randomly oriented stellate, spindle-shaped and round tumoral cells with long cytoplasmic processes. More than half of the extracellular matrix lacked expression of VEGF-A. ORM-1 expression was strong in both endothelial cells and tumor cells, and the myxoid extracellular matrix was positive, with moderate or strong immunoexpression in all cases. An important finding of this study was the statistically significant positive correlation between the expression of ORM-1 and VEGF-A in tumor cells (p=0.02).CONCLUSIONS:The results of this study suggest that the expression of VEGF-A and ORM-1 may be associated with two mechanisms (angiogenesis and tumor structural viscosity) that may influence tumor growth in odontogenic myxomaOBJECTIVE:The aim of the present study was to determine and establish the immunohistochemical distribution of VEGF-A and ORM-1 protein in odontogenic myxomas to suggest a possible function in the biological behavior of odontogenic myxomas.MATERIALS AND METHODS:A total of 33 odontogenic myxoma cases and three tooth germs were included. Immunohistochemistry was performed to localize VEGF-A and ORM-1 proteins in tumor cells, endothelial cells and extracellular matrix in the odontogenic myxomas. The intratumoral microvessel density (MVD) was determined with CD34 and Factor VIII antibodies.RESULTS:Immunopositivity was strong in the endothelial cells, which compose various vessels, and in the randomly oriented stellate, spindle-shaped and round tumoral cells with long cytoplasmic processes. More than half of the extracellular matrix lacked expression of VEGF-A. ORM-1 expression was strong in both endothelial cells and tumor cells, and the myxoid extracellular matrix was positive, with moderate or strong immunoexpression in all cases. An important finding of this study was the statistically significant positive correlation between the expression of ORM-1 and VEGF-A in tumor cells (p=0.02).CONCLUSIONS:The results of this study suggest that the expression of VEGF-A and ORM-1 may be associated with two mechanisms (angiogenesis and tumor structural viscosity) that may influence tumor growth in odontogenic myxom

Integration of a Proximity Detection Prototype into a VO Developed with PANGEA

This article presents a proximity detection prototype that uses ZigBee technology developed using the agent’s platform PANGEA (Platform for Automatic coNstruction of orGanizations of intElligent Agents). PANGEA is an agent platform to develop open multiagent systems, specifically those including organizational aspects such as virtual agent organizations. The platform allows the complete management of organizations and offers tools to the end user. Due to the specific characteristics of this prototype, PANGEA is the perfect candidate to develop the prototype that will be included in the future in an integral system primarily oriented to facilitate the integration of people with disabilities into the workplace

Towards enhancing the safety of Advanced Air Mobility: Automatic 3D inter-urban modelling for improved weather monitoring

Abstract. Advanced Air Mobility (AAM) is an emerging sector that aims to optimise transportation in urban and interurban environments using Unmanned Aerial Vehicles (UAVs). However, these aircraft are particularly susceptible to adverse weather phenomena, such as turbulence or wind gusts. To ensure the safety of operations, high-resolution real-time atmospheric prediction models, such as those based on Computational Fluid Dynamics (CFD), are required. The development of these systems faces challenges as accurate geometric models of navigation environments are needed to simulate the interaction between the wind and the terrain and infrastructure. These models feature complex geometries, so they cannot be manually crafted, requiring automated processing of geospatial data sources. As the main novelty, this work presents a methodology for the automated modelling of interurban environments for CFD simulations using digital elevation models and georeferenced surface semantic classification data. A practical case study was developed in the outskirts of Vigo (Spain), where we demonstrate the effectiveness of our approach and its integration with the open-source CFD software OpenFOAM.Agencia Estatal de Investigación | Ref. TED2021-129757B-C3Agencia Estatal de Investigación | Ref. PID2021-125060OB-100Ministerio de Universidades | Ref.FPU21/0117

An integrated system for disabled people developed with the agent platform PANGEA

New trends in multi-agent systems call for self-adaptation and high dynamics, hence the new model of open MAS or virtual organization of agents. However, as existing agent platforms are not yet equipped to support this behavior, it is necessary to create new systems and mechanisms to facilitate the development of these new architectures. This article presents PANGEA, an agent platform to develop open multi-agent systems, specifically those including organizational aspects such as virtual agent organizations. The platform allows the integral management of organizations and offers tools to the end user. Additionally, it includes a communication protocol based on the IRC standard, which facilitates implementation and remains robust even with a large number of connections. The introduction of a CommunicationAgent and a Sniffer make it possible to offer Web Services for the distributed control of interaction. In order to test PANGEA, an integral system was developed to help the disabled, gathering a set of easily deployable and integrated services under a single architecture

Relevance of Individual Data When Assessing the Gastrointestinal Nematode Infection Level, Nutritional and Productive Variables in a Tropical Farm Context: The Median Isn’t the Message

We evaluated the relationship between individual and herd GIN infection level, nutrition, production performance and anemia parameters in a tropical farm context. Fifty-four female goats were monitored to assess their body condition score (BCS, nutritional status indicator), live weight (LW) and LW gain (LWG, both used as production level indicators), FAMACHA© and hematocrit (HT, both used as anemia indicators). Goats browsed for 4 h in a tropical forest and received balanced feed and chopped grass. The eggs per gram of feces (EPG) indicated the GIN burden, with fecal samples obtained at 7:00 (AM) and 15:00 h (PM.) from each goat at six sampling points during the study. The variables and their relationship with GIN burdens were analyzed using Kruskall–Wallis, ANOVA and Friedman tests and Spearman correlations. The fecal samples obtained in the AM and PM can be equally representative of parasitic burdens (similar and highly correlated). However, the EPG of individual goats from periods of 30 days apart can be considered independent. The BCS and LWG varied between sampling times (p \u3c 0.05), whereas EPG, LW and HT did not (p \u3e 0.05). The GIN burden was negatively correlated with HT and BCS (−0.21, p = 0.01 for each one). The individual pattern of infection demonstrates the true impact of GINs on their hosts. Additionally, feeding and nutritional status may present important variations influencing the performance of the goats more than the impact of GINs under the farm conditions of the present study. However, GIN infection contributed to the variation in goat health and productivity in this tropical farm

Personalization of the Workplace through a Proximity Detection System Using User Profiles

This paper presents a prototype for adapting workplaces for disabled people. The effective integration of people with disabilities in the workplace is a huge challenge to society, and it presents an opportunity to make use of new technologies. The project, called AZTECA, aims to develop new tools that contribute to the employment of groups of people with visual, hearing, or motor disabilities in office environments. These different tools for the disabled people have been modelled with intelligent agents that use Web services. These agents are implemented and deployed within the PANGEA platform so PANGEA conforms the skeleton of the system and allows to develop an integral system. The main target of prototype presented in this work is the people detection using ZigBee technology and the personalization of the workplace according to the user’s disability

Platform for building large-scale agent-based systems

This paper presents an agent platform called PANGEA (Platform for Automatic construction of orGanizations of intElligent Agents). This platform allows to developed multiagent systems modeled as Virtual Organizations. The concepts of roles, organizations and norms are fully supported by the platform assuring flexibility and scalability. Moreover, a communication protocol based on IRC gives high performance and reliability to this kind of distributed systems

Personalization of the Workplace through a Proximity Detection System Using User’s Profiles

This article presents a proximity detection prototype that will be included in the future in an integral system primarily oriented to facilitate the labor integration of people with disabilities. The main goal of the prototype is to detect the proximity of a person to a computer using ZigBee technology and then, to personalize its workplace according to his user’s profile. The system has been developed as an open MultiAgent System architecture using the agent’s platform PANGEA, a Platform for Automatic coNstruction of orGanizations of intElligent Agents