Detection of Communities within the Multibody System Dynamics Network and Analysis of Their Relations

Multibody system dynamics is already a well developed branch of theoretical, computational and applied mechanics. Thousands of documents can be found in any of the well-known scientific databases. In this work it is demonstrated that multibody system dynamics is built of many thematic communities. Using the Elsevier’s abstract and citation database SCOPUS, a massive amount of data is collected and analyzed with the use of the open source visualization tool Gephi. The information is represented as a large set of nodes with connections to study their graphical distribution and explore geometry and symmetries. A randomized radial symmetry is found in the graphical representation of the collected information. Furthermore, the concept of modularity is used to demonstrate that community structures are present in the field of multibody system dynamics. In particular, twenty-four different thematic communities have been identified. The scientific production of each community is analyzed, which allows to predict its growing rate in the next years. The journals and conference proceedings mainly used by the authors belonging to the community as well as the cooperation between them by country are also analyzed

The plans of the new church and the geometric street map of Santa Pola

La investigación histórica y en geografía a veces da resultados sorprendentes. Este es el caso del descubrimiento del Proyecto de Iglesia Parroquial para el pueblo de Santa Pola, en el que se incluye, además de los planos originales de la conocida como «iglesia rota» (actual mercado de abastos), un «Plano Topográfico de Santa Pola» de gran transcendencia para conocer los inicios de la evolución urbana de la localidad, todos ellos firmados por Francisco Morell Gómez en 1863. Primero, se trata el proyecto de la iglesia, analizando los datos de los planos. Después, lo más interesante es el citado plano topográfico inédito. Se efectúa una comparación con el firmado en 1863 por el arquitecto José Ramón Mas Font. ¿Son iguales? ¿Tienen diferencias? ¿Cuáles son y qué importancia tienen? El plano resulta un instrumento de investigación de primer orden para dar respuesta a estas preguntas.La recerca històrica i geogràfica a vegades dóna resultats sorprenents. Aquest és el cas de la troballa del "Proyecto de Iglesia Parroquial para el pueblo de Santa Pola", en què s’inclou, a més dels plànols originals de la coneguda com a «església rota» (l’actual mercat central), un «Plano Topográfi co de San-ta Pola» de gran transcendència per a conéixer els inicis de l’evolució urbana de la localitat, tots signats per Francisco Morell Gómez el 1863. Primer, tractem el projecte de l’església, analitzem les dades del projecte i els plànols. Després, el més interessant és el plànol topogràfic inèdit esmentat. Fem una comparació amb el signat el 1863 pel també arquitecte José Ramón Mas Font. Són iguals? Tenen diferències? Quines són i quina importància tenen? El plànol esdevé un instrument de recerca de primer ordre per a donar resposta a aquestes preguntes.The geographical and historical research often gives surprising re-sults. This is the case of the discovery of the Project of a Parish Church for the town of Santa Pola, which includes, in addition to the original plans of the church known as the «broken church» (the current market), a «Topographical map of Santa Pola» of great importance to know the beginnings of the urban development in the town, all of them signed by Francisco Morell Gómez in 1863. Firstly, we study the church’s project, and analyze the project’s details and the plans. Then, the most interesting matter is the unusual topographic map mentioned before. We compare it with the map signed in 1863 by the architect José Ramón Mas Font. Are they equal? Are there differences? What are the differences and how important are they? The map becomes a basic research tool to answer these questions

Fertilització dels oceans i clima

La fertilització artificial dels oceans amb ferro ha estat proposada com una opció més per mitigar els efectes de l'escalfament global antropogènic. El que es pretendria és estimular els oceans com a principal embornal de CO2 al planeta en escales de desenes a centenars d'anys. Estudis paleoclimàtics i de fertilització in situ des de vaixells, de fet, mostren que l'entrada de ferro en zones on la productivitat primària del fitoplàncton està limitada per aquest nutrient pot incrementar, a vegades, l'exportació de carboni i disminuir la pressió parcial de CO2 a les aigües superficials de l'oceà i, alhora, el CO2 atmosfèric. Cal tenir en compte, però, que el procés de fertilització artificial no sempre aconsegueix segrestar carboni a l'oceà profund i pot donar lloc a nombrosos efectes secundaris l'abast dels quals és desconegut. Aquests inclouen l'eutrofització i l'increment de zones anòxiques, canvis en el pH i en la distribució natural global dels nutrients, canvis en l'estructura i composició dels ecosistemes i la generació de gasos amb influència en el clima. Tot plegat fa que, a la comunitat científica, la fertilització artificial dels oceans amb ferro per treure CO2 de l'atmosfera es vegi com una opció amb poc potencial, ateses les incerteses científiques i els possibles costos ambientals i econòmics inacceptables.Artificial iron fertilization of the oceans has been proposed as one of the options to mitigate the effects of anthropogenic global warming. The aim is to enhance the role of the ocean as the Earth’s major carbon sink in decadal to centennial timescales. Research on paleoclimate archives and in situ iron fertilization from ships have shown that the input of iron to the oceans in regions where phytoplankton primary productivity is limited by this nutrient may sometimes increase the export of carbon, and decrease the surface ocean CO2 partial pressure, and thus atmospheric CO2. However, artificial iron fertilization does not always bring about deep-ocean carbon sequestration and may lead to a number of side effects whose real magnitude is yet unknown. These effects include eutrophication and the increase of anoxic zones, changes in pH and in the natural global distribution of nutrients, changes in the structure and composition of ecosystems, and the generation of climate-influencing gases. Consequently, the scientific community does not view iron fertilization as a valid climate mitigation strategy, given the existing scientific uncertainties and possibly unacceptable environmental and financial costs

Distribution of Glycerol Dialkyl Glycerol Tetraethers (GDGTs) in Microbial Mats From Holocene and Miocene Sabkha Sediments

Sabkhas are important settings for understanding early earth biological environments, and the algal mats associated with them are thought to be potential source rocks for hydrocarbon production. In this study we compare the sedimentological facies and distribution of branched, and isoprenoid glycerol dialkyl glycerol tetraethers (GDGTs) in modern and mid-Holocene sabkha sediments from Abu Dhabi with well-preserved Miocene (12–13 Ma) sabkha sediments recently recovered at IODP site U1464 off the north coast of Australia. We show that the facies of the Miocene sediments is very similar to Holocene and modern sabkhas. Furthermore, we show that there are distinct patterns of isoprenoid GDGT distributions in the modern sabkha and that these patterns are well preserved in both the buried Holocene and the Miocene algal mats. The sabkha sediments analyzed are characterized by high %GDGT-0 and methane index, dominance of branched GDGTs over crenarchaeol (high BIT index), an unusual distribution of isoprenoid GDGTs 1–3, and also low abundance of archeol. The distribution of branched GDGT differs between modern and Miocene sabkhas and is similar in Miocene sabkha and non-sabkha sediments suggesting that they may be of limited use to distinguish paleo-sabkha sediments. Overall, isoprenoid GDGT distributions appear to be different from those found in modern soils, lakes and marine sediments, as well as from those found in Miocene shallow water sediments right below the sabkha, therefore they could be used in combination with facies analysis to identify paleo-sabkha environments in sedimentary sequences

The VEX-93 environment as a hybrid tool for developing knowledge systems with different problem solving techniques

The paper describes VEX-93 as a hybrid environment for developing knowledge-based and problem solver systems. It integrates methods and techniques from artificial intelligence, image and signal processing and data analysis, which can be mixed. Two hierarchical levels of reasoning contains an intelligent toolbox with one upper strategic inference engine and four lower ones containing specific reasoning models: truth-functional (rule-based), probabilistic (causal networks), fuzzy (rule-based) and case-based (frames). There are image/signal processing-analysis capabilities in the form of programming languages with more than one hundred primitive functions. User-made programs are embeddable within knowledge basis, allowing the combination of perception and reasoning. The data analyzer toolbox contains a collection of numerical classification, pattern recognition and ordination methods, with neural network tools and a data base query language at inference engines's disposal. VEX-93 is an open system able to communicate with external computer programs relevant to a particular application. Metaknowledge can be used for elaborate conclusions, and man-machine interaction includes, besides windows and graphical interfaces, acceptance of voice commands and production of speech output. The system was conceived for real-world applications in general domains, but an example of a concrete medical diagnostic support system at present under completion as a cuban-spanish project is mentioned. Present version of VEX-93 is a huge system composed by about one and half millions of lines of C code and runs in microcomputers under Windows 3.1.Postprint (published version

Contribución a la determinación y simulación de las vibraciones e impactos en operaciones de transporte y distribución de productos de consumo embalados

El trabajo se acoge a la modalidad de tesis por compendio de publicaciones del Departamento de Proyectos de Ingeniería de la Universidad Politécnica de Valencia. Consta de seis artículos, de los cuales, dos de ellos han sido publicados en la revista "Packaging Technology and Science", otros dos artículos publicados en "Advances in Experimental Mechanics Vols 7-8", un quinto artículo publicado en "World Congress on Engineering 2007, Vols 1 and 2" y un sexto artículo enviado y pendiente de ser aceptado en la revista "Packaging Technology and Science". El nexo común que los une es el de profundizar en la generación de nuevo conocimiento dentro del campo de la ingeniería del embalaje, siendo su objetivo final, el de mejorar las técnicas actuales de simulación de los riesgos transmitidos al producto y su embalaje en los procesos de transporte y distribución. Las investigaciones planteadas y detalladas en cada uno de los artículos pretenden aportar una contribución parcial a un objetivo tan ambicioso como el planteado. Uno de los abusos mecánicos importantes, aplicado al producto embalado durante el proceso de transporte y distribución, son los impactos o caídas a los que son sometidos los productos embalados. El primer artículo de investigación se ha centrado en la medida y análisis de estos impactos recibidos por productos embalados que son enviados por avión mediante empresas transportistas de paquetería (DHL y FedEx) entre Europa y USA, obteniendo datos necesarios para simular en laboratorio las condiciones intercontinentales del transporte de paquetería para el correcto diseño de los embalajes de protección. La severidad de los impactos a menudo se describe en función de su altura de caída-libre equivalente (EDH) y de la orientación del impacto, para así facilitar los ensayos de caída en laboratorio. El enfoque generalmente utilizado es utilizar un paquete que contiene un registrador de aceleraciones y procesar los datos obtenidos para obtener una distribución estadGarcía-Romeu Martínez, MA. (2008). Contribución a la determinación y simulación de las vibraciones e impactos en operaciones de transporte y distribución de productos de consumo embalados [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/2927Palanci

A New Electromechanical Analogy Approach Based on Electrostatic Coupling for Vertical Dynamic Analysis of Planar Vehicle Models

Article number 9524572Analogies between mechanical and electrical systems have been developed and applied for almost a century, and they have proved their usefulness in the study of mechanical and electrical systems. The development of new elements such as the inerter or the memristor is a clear example. However, new applications and possibilities of using these analogues remain to be explored. In this work, the electrical analogues of different vehicle models are presented. A new and not previously reported analogy between inertial coupling and electrostatic capacitive coupling is found and described. Several examples are provided to highlight the benefits of this analogy. Well-known mechanical systems like the half-car or three three-axle vehicle models are discussed and some numerical results are presented. To the best of the author’s knowledge, such systems were never dealt with by using a full electromechanical analogy. The mechanical equations are also derived and compared with those of the electrical domain for harmonic steady-state analysis.Ministerio de Ciencia, Innovación y Universidades(España) PGC2018-098813-B-C3

La frontera marítima fortificada: de la vigilancia a la señalización (XVI-XIX)

[EN] During the 16th century an ambitious political programme for building towers and forts bordering the Spanish Empire’s littoral, to protect it, is materialised. This sighting network over the sea horizon had the essential mission of detecting the presence of vessels that supposed a threat. The network was organised through the strategic arrangement of watchtowers taking profit of the geographical features in the topography so that they could communicate among them with a system of visual signs. The virtual union of the stated settlements defined the fortified maritime borderline. At the same time, this network of sentinels was reinforced (in certain settlements) by the construction of fortifications that acted like centres of data reception and supplied the necessary personnel for detection and transmission. So, this mesh was established by observation points (watchtowers) and information and defense centres (fortifications) to make the news arrive to the decision centres. The present communication aims to demonstrate this military strategy providing the inventory of all defensive architectures that marked this limit between the Segura river mouth until the Huertas cape and that these are spotted from the ‘Flat’ island (later Nueva Tabarca). A riverside geography of approximately 30 km long where 3 fortifications and 7 towers of diverse typologies successively took place. Among the most relevant documents of this research, we could mention the plans of the fortifycations in Guardamar and Santa Pola from the 16th century (drawn in the 18th). For this research, drawings of towers made by the Ministry of Public Works at the end of the 19th century are also important; these documents show the new military tactics, neither for attack neither for defense. At most, they replaced for maritime lighthouses for signage and help for navigation while the others towers were abandoned.García Mas, A.; Martínez-Medina, A. (2015). La frontera marítima fortificada: de la vigilancia a la señalización (XVI-XIX). En Defensive architecture of the mediterranean: XV to XVIII centuries. Vol. I. Editorial Universitat Politècnica de València. 61-68. https://doi.org/10.4995/FORTMED2015.2015.1670OCS616

Sustainability dimensions: A source to enhance corporate reputation

ABSTRACT: The aim of this paper is to enhance our understanding of the relationship between sustainability and corporate image and reputation according to the legitimacy theory framework since the current academic literature does not have an understanding of how sustainability and corporate image and reputation interact. Authors conducted a survey to test the hypotheses. The study was tested using data collected from a sample of 382 Spanish consumers. The proposed hypotheses were analyzed through a structural equation model showing that sustainability plays a vital role as antecedent of both corporate image and reputation. Findings suggest that the economic, social and environmental domains of sustainability present a direct and positive relationship with both corporate image and reputation