528 research outputs found
A study of monodromy in the computation of multidimensional persistence
No full textThe computation of multidimensional persistent Betti numbers for a sublevel filtration on a suitable topological space equipped with a R^n-valued continuous filtering function can be reduced to the problem of computing persistent Betti numbers for a parameterized family of one-dimensional filtering functions. A notion of continuity for points in persistence diagrams exists over this parameter space excluding a discrete number of so-called singular parameter values. We have identified instances of nontrivial monodromy over loops in nonsingular parameter space. In other words, following cornerpoints of the persistence diagrams along nontrivial loops can result in them switching places. This has an important incidence, e.g., in computer-assisted shape recognition, as we believe that new, improved distances between shape signatures can be defined by considering continuous families of matchings between cornerpoints along paths in nonsingular parameter space. Considering that nonhomotopic paths may yield different matchings will therefore be necessary. In this contribution we will discuss theoretical properties of the monodromy in question and give an example of a filtration in which it can be shown to be nontrivial
Desempeño docente en el proceso de enseñanza aprendizaje. Estudio realizado en la Unidad Educativa Fiscal Tumbaco, en la jornada diurna y nocturna, en el bachillerato, en parroquia de Tumbaco, en el cantón Quito, en la provincia de Pichincha, durante el año lectivo 2013-2014
No full textLa investigación se realizó en la Unidad Educativa Fiscal Tumbaco sección matutina y nocturna. El problema de la investigación es encontrar indicadores: que son utilizados con poca frecuencia, a los cuales se les da poca importancia, y/o indicadores de los que se tiene poco conocimiento; pero que afectan significativamente el desempeño docente. En cuanto a las técnicas para la investigación de campo se emplea la observación no participante y la encuesta. Además se utilizó instrumentos estandarizados (Cuestionario de autoevaluación del desempeño docente y registro de observación de las actividades docentes). Para seleccionar la muestra se aplicó muestreo por cuotas (Aquel en el que el investigador elige a los elementos de la muestra que poseen ciertas características: Estar laborando en el bachillerato e impartir Física o Matemáticas). Se ejecutó el análisis cuantitativo, obteniéndose los siguientes resultados: En la Unidad Educativa Fiscal Tumbaco, el desempeño profesional de los docentes es de 9,04 puntos equivalente a Excelente. La puntuación más baja (7,0 puntos) se obtuvo en el ámbito de la Planificación Institucional y Curricular, por lo que se plantea como propuesta: Participar en la elaboración del Plan Educativo Institucional (PEI). Le invitamos a leer esta investigación, que pretende mediante propuestas concretas, elevar el desempeño docente y la calidad de la educación en la institución
X-Bridge Project: development of a new methodology for the monitoring of steel bridges
No full textThe main aim of this paper is to describe the results obtained applying a new methodology developed in order to assess the presence of overloaded areas in steel bridges. The methodology is based on the principle that if the load applied (also just once) in a particular area is higher than the yield strength, it changes the residual stress in this area, inducing a different value of stress if compared with the other areas not overloaded. Using X-Ray diffraction it is possible to detect the value of residual stress on the surface of metals, also in small areas, in a non-destructive way. Therefore, this technology is used to detect the presence of overloaded areas on steel bridges. As the areas sampled from X-Ray diffraction are very small (1-2 millimeters of diameter) compared with the dimensions of a bridge, it is necessary to know exactly the position of the areas subjected to the maximum load during the life of the bridge. For this reason FEM analysis are previously conducted in order to evaluate maximum load regions. The construction drawings necessary to perform the FEM analysis are not always available, especially for old bridges, therefore reality-based 3D models are created. Such method is also useful by itself, as beside providing suitable drawings for the FEM analysis, it allows to quickly identify possible large deformations of the bridge structur
Access to complex reality-based 3d models using virtual reality solutions
No full textCultural Heritage is a precious resource that witnesses our past and that should be transmitted to future generations. The creation of digital 3D representation of monuments and sites have been demonstrated to be a reliable method for preservation and historical purposes. In order to preserve a high level of detail, the reconstructed point cloud will typically contain millions of points, which could result in several GB of data when stored on disk. For these reasons, a challenge for the scientific community is to find new ways to visualize and disclose 3D digital contents, obtaining a better access and communication of the Cultural Heritage information. In this paper, Virtual Reality (VR) devices are employed to provide not only a simple visualization but also an immersive experience for digitally reconstructed heritage scenarios. Oculus Rift (VR visualization headset) and Kinect (depth sensor for user interaction) are integrated in order to interact and navigate in a complex 3D or 4D (temporal) archaeological scene as well as to have access to digital media contents of several MB of size. In this way, archaeological sites or fragile environments with forbidden access due the preservation policies can also be virtually visited and inspected
On the Non-Additive Sets of Uniqueness in a Finite Grid
No full textIn Discrete Tomography there is a wide literature concerning (weakly) bad configurations. These occur in dealing with several questions concerning the important issues of uniqueness and additivity. Discrete lattice sets which are additive with respect to a given set of lattice directions are uniquely determined by -rays in the direction of . These sets are characterized by the absence of weakly bad configurations for . On the other side, if a set has a bad configuration with respect to , then it is not uniquely determined by the -rays in the directions of , and consequently it is also non-additive. Between these two opposite situations there are also the non-additive sets of uniqueness, which deserve interest in Discrete Tomography, since their unique reconstruction cannot be derived via the additivity property. In this paper we wish to investigate possible interplays among such notions in a given lattice grid , under -rays taken in directions belonging to a set of four lattice directions
The Etruscan in 3D: from space to underground
No full textGeomatics and Geoinformatics deal with spatial and geographic information, 3D surveying and modelling as well as information science infrastructures. Geomatics and Geoinformatics are thus involved in cartography, mapping, photogrammetry, remote sensing, laser scanning, Geographic Information Systems (GIS), Global Navigation Satellite Systems (GNSS), geo-visualisation, geospatial data analysis and Cultural Heritage documentation. In particular the Cultural Heritage field can largely benefit from different Information and Communication Technologies (ICT) tools to make digital heritage information more informative for documentation and conservation issues, archaeological analyses or virtual museums. This work presents the 3D surveying and modelling of different Etruscan heritage sites with their underground frescoed tombs dating back to VII-IV century B.C.. The recorded and processed 3D data are used, beside digital conservation, preservation, transmission to future generations and studies purposes, to create digital contents for virtual visits, museum exhibitions, better access and communication of the heritage information, etc
The Convention on the Recognition and Enforcement of Foreign Arbitral Awards, New York, 10 June 1958: Still Fit For Purpose?
No full textThis thesis analyses the current status of the 1958 Convention on the Recognition and Enforcement of Foreign Arbitral Awards (hereinafter, "NYC") and its future perspectives. In particular, the author wonders whether the current state of affairs of the NYC's regime is satisfactory for international arbitration users and traders, or if it does not longer fit for its purpose. In addition, the author focuses on determining if it is necessary to make a revision of the Convention and offers a proposal: the adoption of an Amending Protocol.
As reflected in its historical background, the adoption of the NYC in 1958 was part of the constant evolution of international commercial arbitration in its task of serving trade. Indeed, in the middle of the 20th century the international business community insistently requested their governments to establish a new global system for the execution of foreign arbitration awards, in order to improve the conditions provided for in a treaty developed in the 1920 decade (namely, the 1927 Geneva Convention on the Execution of Foreign Arbitral Awards). For the merchants of that time, the regime in force no longer entirely met modern economic requirements. A more international modern treaty was crucial to guarantee the circulation of arbitration awards throughout the world, and, therefore, to ensure the effectiveness of the resolution of global commercial disputes.
The NYC not only met that need, but also exceeded it. In fact, thanks to its provisions and its number of adhering States (170), the enforcement of awards abroad became considerably easier than that one of judgments rendered by national courts. This agreement is said to be the "most important and successful United Nations treaty in the area of international trade law, and the cornerstone of the international arbitration system". Undoubtedly, it turned out to be the most important achievement of contemporary international commercial arbitration in its mission to support transnational business transactions.
However, despite its success, during its 63 years of life, the NYC has not been without criticism. Many scholars have shed light on the flaws in its text and have opened a discussion with respect to its amendment, or even its replacement. Nonetheless, most arbitration experts have expressed themselves contrary to these possibilities.
In this context, the thesis focuses on examining the NYC shortcomings and determining if they have affected its performance and the achievement of its objectives and if, in any case, it is possible to overcome such shortcomings without an amendment or replacement. Moreover, the author analyzes if the NYC is adequately serving the current international business community and if it would be capable to satisfy international trade actors of the coming decades.
With this thesis the author intends to collaborate with the current debate on the necessity to revise the NYC of 1958. Many are the academic texts that criticize the Convention, but just a few that try to give a concrete answer on how to solve this situation. Indeed, most of the authors concentrates on protecting the treaty in question and defending its current status quo, despite its obvious and serious deficiencies. At some point - it is expected in the short term - the NYC will be modified. Otherwise, its shortcomings, its obsolescence, and its negative practical consequences will hinder the correct development of international arbitration and transnational trade. For this reason, it results necessary to have as many academic essays as possible regarding the available options to amend this treaty.Questa tesi esamina lo stato attuale della Convenzione del 1958 sul riconoscimento e l'esecuzione delle sentenze arbitrali straniere (si seguito,"CNY") e le sue prospettive future. In particolare, l'autore si chiede se allo stato attuale il regime della CNY sia soddisfacente per coloro che si avvalgono dell'arbitrato internazionale e gli operatori commerciali, o se in realtà non sia più idoneo al suo scopo. Inoltre, l'autore si concentra sulla eventuale necessità di una revisione della CNY ed a tal riguardo individua una proposta: l'adozione di un Protocollo addizionale. Come si evince dal suo contesto storico, l'adozione della CNY nel 1958 faceva parte della costante evoluzione dell'arbitrato commerciale internazionale nella sua funzione di servire il commercio.
Infatti, a metà del XX secolo la comunità internazionale imprenditoriale ha insistentemente richiesto ai propri governi di stabilire un nuovo sistema globale per l'esecuzione dei lodi arbitrali stranieri, al fine di migliorare le condizioni previste da un trattato sviluppato negli anni '20 (ovvero, la Convenzione di Ginevra del 1927 sull'esecuzione dei lodi arbitrali stranieri). Per i commercianti dell'epoca, il regime in vigore non rispondeva più del tutto ai moderni parametri economici. Un trattato internazionale maggiormente moderno era fondamentale per garantire la circolazione dei lodi arbitrali nel mondo, e, quindi, per garantire l'efficacia della risoluzione delle controversie commerciali globali.
La CNY non solo ha soddisfatto questa esigenza, ma l'ha anche superata. Infatti, grazie alle sue disposizioni ed al numero degli Stati aderenti (170), l'esecuzione di lodi all'estero è diventata notevolmente più facile dell'esecuzione di sentenze rese dai tribunali nazionali. Si dice che questo accordo sia "the most successful United Nations treaty in the area of international trade law, and the cornerstone of the international arbitration system". Indubbiamente, esso si è rivelato il più importante risultato dell'arbitrato commerciale internazionale contemporaneo nella sua missione di supporto delle transazioni commerciali transnazionali.
Tuttavia, nonostante il suo successo, durante i suoi 63 anni di vita, la CNY non è stata esente da critiche. Molti studiosi hanno messo in luce i difetti del suo testo e hanno aperto una discussione in merito alla sua modifica, o anche alla sua sostituzione. Tuttavia, la maggior parte degli esperti nel settore dell'arbitrato si sono espressi in senso contrario a queste possibilità.
In questo contesto, la tesi si concentra sull'esame delle carenze della CNY e valuta se le stesse abbiano influenzato la sua realizzazione ed il raggiungimento dei suoi obiettivi e se, in ogni caso, sia possibile ovviare a tali carenze senza una modifica o sostituzione della Convenzione. Inoltre, l'autore si chiede se la CNY sia adeguata a servire l'attuale comunità imprenditoriale internazionale e se potrebbe essere in grado di soddisfare gli attori del commercio internazionale dei prossimi decenni.
Con questa tesi l'autore intende collaborare all'attuale dibattito circa la necessità di sottoporre a revisione la CNY del 1958. Molti sono i testi accademici che criticano la Convenzione, ma solo alcuni di essi cercano di dare una risposta concreta sulle modalità di risoluzione di tale situazione. In effetti, la maggior parte degli autori si concentra sulla protezione del trattato in questione e sulla difesa del suo attuale status quo, nonostante le sue evidenti e gravi carenze. Ad un certo punto, la CNY sarà modificata, auspicabilmente nel breve periodo. Altrimenti, le sue carenze, la sua obsolescenza e le sue conseguenze pratiche negative ostacoleranno il corretto sviluppo dell'arbitrato internazionale e del commercio transnazionale. Per questo motivo, risulta necessario che vi sia il maggior numero possibile di contributi accademici che prospettino le opzioni disponibili al fine di modificare questo trattato
Flower Power: Lucile Belen and the Politics of Integrity
No full textThose who decry the character and quality of our political leadership — usually for good reason — often fail to present us with an alternative, or remind us of those whose public trust has been both well earned and well served. This article does the latter, profiling Lucile Belen, a Midwestern politician who has carried on a legendary family tradition of service that continues to inspire. Her entire life has been lived in democracy’s shadow, working to improve her community as a politician, businesswoman, and civic leader. In many respects, it is also the story of the evolution of public service and public life, particularly the role of women. The article chronicles some of the formative experiences in the first half of the twentieth century that forged her brand of leadership. The author argues that, as she stands at the threshold of her tenth decade while continuing to maintain a vigorous civic presence, Belen embodies a tradition of honorable political and civic responsibility that is in peril and desperate need of revitalization and renewal
Rilievi e modellazione 3D
No full textThe generation of 3D models of sites and objects requires a methodology able to deliver reliable and precise results with all the geometric and radiometric details of the surveyed scene. Nowadays the surveying techniques employ passive or active sensors, alone or in an integrated mode in order to exploit all the advantages of each technique. Reality-based 3D models are used in many applications like mapping, monitoring, documentation, conservation, animation, planning, heat dispersion estimation, etc. The article reviews the most common surveying techniques and 3D modeling issues before presenting different examples of projects running in FBK
Semiótica narrativa en el discurso publicitario contemporáneo: análisis de la landing page de “Manantiales” del Grupo Edisur
No full textEn este trabajo aplicaremos la propuesta greimasiana del recorrido generativo de sentido en el estudio de los discursos en el marco de lo que reconocemos como dispositivo publicitario (Boito et al. 2015), entendido éste como aquel que asume el espacio-tiempo de materialización (y no sólo de mediación o divulgación) de aquellas imágenes sobre lo que la sociedad "cree" de sí misma; es decir, se instaura en el corazón de los dispositivos de regulación de la sensibilidad social, configurando el espectro y los límites de lo que una sociedad considera "aceptable" y "deseable". Elementos de la semiótica greimasiana nos sirven de entrada analítica a los discursos publicitarios para reconocer sus elementos estructurales, abordando la pieza publicitaria como narración. En este caso, tomamos la landing page del proyecto Manantiales, del Grupo Edisur. Analizaremos el recorrido generativo de sentido de este dispositivo publicitario, dando cuenta como su despliegue visual también implica un despliegue de generación de sentido y transformaciones en los niveles de análisis. ¿Qué actantes se presentan y de qué modo? ¿Qué objetos de valor propone esta publicidad? son algunos de los interrogantes que guiarán dicho análisis.Fil: Angelelli, Maria Belen. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones y Estudios sobre Cultura y Sociedad. Universidad Nacional de Córdoba. Centro de Investigaciones y Estudios sobre Cultura y Sociedad; ArgentinaFil: Vaccaro, Natalia Desirée. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones y Estudios sobre Cultura y Sociedad. Universidad Nacional de Córdoba. Centro de Investigaciones y Estudios sobre Cultura y Sociedad; Argentina14º Congreso Mundial de Semiótica: TrayectoriasCiudad Autónoma de Buenos AiresArgentinaUniversidad Nacional de las Artes. Área Transdepartamental de Crítica de ArtesAsociación Argentina de SemióticaInternational Association for Semiotic Studie
- …
