St. George and the Dragon: Design and production of a cultural heritage museum installation using media archaeology

Media archaeology is a field of media research investigating new media cultures through material manifestations. Although often recognized as an approach to art, its use as an approach to design has not been fully explored. Media archaeology can be valuable because it offers alternative qualities of mediation, as a design palette, to that of prescriptive common media devices. This thesis describes a media archaeological approach towards the design of a cultural heritage media installation, exhibited at Häme Castle between April–December 2017, and produced as a collaboration between the National Museum of Finland (Kansallismuseo) and the Systems of Representation research group in the Department of Media at Aalto University in Finland. The installation displayed a multi-view stereoscopic (3D) digital reconstruction of a medieval sculptural scene of St. George and the Dragon, based on preserved, fragmented medieval sculptures from the museum’s archives. Four stereoscopic video viewers were synchronized to a rotating central physical display, affording visitors an effect of augmented reality, without the need for a mainstream augmented reality implementation. Though the work was time-limited and project-driven, the design approach achieved a well-integrated installation that was sensitive to the aims of an exhibition of sculpture within a cultural heritage museum: artistry, materiality, interpretation. This thesis therefore seeks to argue that media archaeological approaches to design can identify historical ideas that can be remediated into relevancy for new contexts, and, in spite of their historical connotations, foster engaging technological experiences for the contemporary audience, that are sensitive to the aims of an exhibition of cultural heritage

Analyse/conception par points de vue : le profil VUML

L'objectif de la thèse est de proposer une extension du langage de modélisation unifié (UML) orientée points de vue. Cette extension, appelée VUML (View based Unified Modeling Language) offre un formalisme (extension d’UML) pour modéliser un système logiciel par une approche combinant objets et points de vue. Le principal ajout à UML est celui du concept de classe multivues. Une classe multivues est une unité d’abstraction et d’encapsulation qui permet de stocker et restituer l'information en fonction du profil de l'utilisateur. Elle offre des mécanismes de gestion des droits d’accès aux informations, de changement dynamique de points de vue et de gestion de la cohérence entre les vues dépendantes. De plus, VUML propose un modèle de composant multivues qui permet de représenter une classe multivues au niveau du diagramme de composants. Sur le plan sémantique, VUML étend le métamodèle d’UML et introduit un certain nombre de stéréotypes regroupés sous forme d’un profil UML. A l’instar d’UML, la sémantique VUML comprend un aspect statique et un aspect dynamique. La sémantique statique de VUML est définie par le métamodèle, des règles de bonne modélisation (well-formedness rules) exprimées en langage formel OCL (Object Constraint Language) et des descriptions textuelles informelles. La sémantique dynamique quant à elle est décrite d’une manière informelle. Sur le plan méthodologique, VUML propose un noyau d’une démarche qui permet d’intégrer de façon logique et consistante la notion de point de vue dans le processus de développement dans le contexte de l’approche MDA (Model Driven Architecture). L’outil support à VUML a été conçu et réalisé en adaptant l’atelier Objecteering/UML par la technique des profils. Cet outil permet de mener une modélisation à base de vues, de vérifier la cohérence des modèles élaborés et de générer du code objet (Java,...) en appliquant un patron d’implémentation générique sur un diagramme de classes VUML. ABSTRACT : This thesis proposes a viewpoint oriented extension of the Unified Modelling Language. This extension, called VUML (View based Unified Modelling Language) provides a formalism for modelling software systems through objects and viewpoints. The main UML extension is the concept of multiviews class whose goal is to encapsulate and deliver information according to the user profile (viewpoint). VUML allows the dynamic change of viewpoint and offers mechanisms to manage consistency among dependent views. Moreover, VUML proposes a multiviews component model. Such a component allows to represent a multiviews class in a component diagram. On the semantic level, VUML extends the metamodel of UML and introduces a set of stereotypes grouped in a UML profile. As in UML, the VUML semantics includes static and dynamic aspects. The VUML static semantics is defined by the metamodel, the well-formedness rules expressed in the formal language OCL (Object Constraint Language), and informal textual descriptions. The VUML dynamic semantics is described so far in an informal manner. On the methodological level, VUML proposes a process that makes possible a logical and consistent integration of the viewpoint concept in the development process according to the MDA approach. A VUML tool has been designed and implemented by adapting the Objecteering/UML tool through the profile technique. This tool allows to carry out a view based modelling, to check the consistency of the elaborated models and to generate object code (Java...) by applying a generic implementation pattern to a VUML class diagram

Predicting Solar Flares Using CNN and LSTM on Two Solar Cycles of Active Region Data

We consider the flare prediction problem that distinguishes flare-imminent active regions that produce an M- or X-class flare in the future 24 hours, from quiet active regions that do not produce any flare within $\pm 24$ hours. Using line-of-sight magnetograms and parameters of active regions in two data products covering Solar Cycle 23 and 24, we train and evaluate two deep learning algorithms -- CNN and LSTM -- and their stacking ensembles. The decisions of CNN are explained using visual attribution methods. We have the following three main findings. (1) LSTM trained on data from two solar cycles achieves significantly higher True Skill Scores (TSS) than that trained on data from a single solar cycle with a confidence level of at least 0.95. (2) On data from Solar Cycle 23, a stacking ensemble that combines predictions from LSTM and CNN using the TSS criterion achieves significantly higher TSS than the "select-best" strategy with a confidence level of at least 0.95. (3) A visual attribution method called Integrated Gradients is able to attribute the CNN's predictions of flares to the emerging magnetic flux in the active region. It also reveals a limitation of CNN as a flare prediction method using line-of-sight magnetograms: it treats the polarity artifact of line-of-sight magnetograms as positive evidence of flares.Comment: 31 pages, 16 figures, accepted in the Ap

Trust on the semantic web

The Semantic Web is a vision to create a “web of knowledge”; an extension of the Web as we know it which will create an information space which will be usable by machines in very rich ways. The technologies which make up the Semantic Web allow machines to reason across information gathered from the Web, presenting only relevant results and inferences to the user. Users of the Web in its current form assess the credibility of the information they gather in a number of different ways. If processing happens without the user being able to check the source and credibility of each piece of information used in the processing, the user must be able to trust that the machine has used trustworthy information at each step of the processing. The machine should therefore be able to automatically assess the credibility of each piece of information it gathers from the Web. A case study on advanced checks for website credibility is presented, and the site presented in the case presented is found to be credible, despite failing many of the checks which are presented. A website with a backend based on RDF technologies is constructed. A better understanding of RDF technologies and good knowledge of the RAP and Redland RDF application frameworks is gained. The second aim of constructing the website was to gather information to be used for testing various trust metrics. The website did not gain widespread support, and therefore not enough data was gathered for this. Techniques for presenting RDF data to users were also developed during website development, and these are discussed. Experiences in gathering RDF data are presented next. A scutter was successfully developed, and the data smushed to create a database where uniquely identifiable objects were linked, even where gathered from different sources. Finally, the use of digital signature as a means of linking an author and content produced by that author is presented. RDF/XML canonicalisation is discussed in the provision of ideal cryptographic checking of RDF graphs, rather than simply checking at the document level. The notion of canonicalisation on the semantic, structural and syntactic levels is proposed. A combination of an existing canonicalisation algorithm and a restricted RDF/XML dialect is presented as a solution to the RDF/XML canonicalisation problem. We conclude that a trusted Semantic Web is possible, with buy in from publishing and consuming parties

Undergraduate Catalog - The School Year 2008-2010

https://digitalcommons.pvamu.edu/pv-undergraduate-catalog/1015/thumbnail.jp

Quantum Algorithm Animator

The design and development of quantum algorithms present a challenge, especially for inexperienced computer science students. Despite the numerous common concepts with classical computer science, quantum computation is still considered a branch of theoretical physics not commonly used by computer scientists. Experimental research into the development of a quantum computer makes the use of quantum mechanics in organizing computation more attractive, however the physical realization of a working quantum computer may still be decades away. This study introduces quantum computing to computer science students using a quantum algorithm animator called QuAL. QuAL\u27s design uses features common to classical algorithm animators guided by an exploratory study but refined to animate the esoteric and interesting aspects of quantum algorithms. In addition, this study investigates the potential for the animation of a quantum sorting algorithm to help novice computer science students understand the formidable concepts of quantum computing. The animations focus on the concepts required to understand enough about quantum algorithms to entice student interest and promote the integration of quantum computational concepts into computer science applications and curricula. The experimental case study showed no significant improvement in student learning when using QuAL\u27s initial prototype. Possible reasons include the animator\u27s presentation of concepts and the study\u27s pedagogical framework such as choice of algorithm (Wallace and Narayanan\u27s sorting algorithm), design of pre- and post tests, and the study\u27s small size (20 students) and brief duration (2 hours). Nonetheless, the animation system was well received by students. Future work includes enhancing this animation tool for illustrating elusive concepts in quantum computing

Intégration de la modélisation comportementale dans la conception par points de vue

View-based modeling is the main subject of this thesis. It is a variant of the object oriented modeling approach for the analysis and design of complex systems, focusing on the actors that use the system and decomposing the specification according to their needs. With this prospect, our team developed a UML profile named VUML (View based UML), which allows the elaboration of a unique and sharable model accessible according to the view of each of the system's actors. However the achieved work on the VUML profile does not tackle the behavior aspects of the modeling process. The VUML approach address the structural aspects related to the composition of views and to the sharing of data without dealing with the way these views will react, or how to be able to synchronize them in order to obtain the behavior of multiple-view objects (instances of a multi-view class). The achieved work in this thesis aims to fill this gap by providing new mechanism to the VUML profile that allows expressing the behavioral needs of a system. We will focus on describing the individual behavior of multi-view objects by state-machines that require adjustments of UML modeling concepts. To achieve this objective we introduced the concept of event probes, which allow to specify implicit communication between the view-objects via event observation. This allows decoupling the view specifications that are a priori strongly interconnected, and therefore allows them to be designed separately, in agreement with the VUML method recommendations, and then to be integrated without the need of making modifications. We first define the concept of event monitoring and identified the different types of probes and the appropriate parameters that characterize them. We also define a set of concepts that can extend and manipulate probes. Then we propose a UML-compatible representation of the introduced concepts in form of a profile named VxUML (extension of VUML). In addition to defining the profile elements (stereotypes, tagged value, predefined library classes), we have developed rules for proper formation of the static semantics using OCL to reduce ambiguity in the specification of such concepts. Afterwards, to demonstrate the usefulness of the concepts introduced, we developed a case study through which we sought to provide a full view-based model, addressing both structural and behavioral aspects. At the end, to concretely validate our approach in a model driven engineering setting, we developed a code generator that takes as input a specification developed in VxUML profile. This generator uses the techniques of model transformation related to the code generation, including transformation of platform independent models (PIM) to platform specific models (PSM), and transformation of PSMs to code; the current target language is Java. Finally, another contribution of this thesis is a process associated with VxUML. It is an approach that complements the approach associated with VUML (which deal only with structural aspects) to be able to use in methodical manner the new mechanisms dedicated to behavioral treatment. Now, the VxUML development process offers a complete view based modeling, that is, dealing with both structural and behavioral aspects. Keywords: View based modeling, VUML profile, VxUML profile, event observation, multi-view states machine, behavior composition.La modélisation par points de vue constitue la thématique générale de notre travail de thèse. C'est une approche de modélisation orientée objet, visant l'analyse et la conception des systèmes complexes avec une démarche centrée autour des acteurs interagissant avec le système. Notre équipe a ainsi développé un profil UML appelé VUML (View based UML), qui permet l'élaboration d'un modèle unique partageable à partir de vues associées aux points de vue des acteurs. Cependant, les travaux réalisés sur le profil VUML [Nassar, 05 ; Anwar, 09] ne couvrent pas les aspects comportementaux de la modélisation. En effet, – en proposant la notion de classe multivue – VUML traite les aspects structuraux liés à la composition des vues et au partage des données statiques sans prendre en compte la manière dont ces vues vont réagir, ni comment les synchroniser afin de représenter le comportement des objets multivue (instances d'une classe multivue). Les travaux effectués dans le cadre de cette thèse cherchent à combler ce manque en dotant le profil VUML de nouveaux mécanismes permettant d'exprimer le comportement d'un système. Nous nous sommes concentrés pour cela sur le comportement des objets multivue décrit par des machines à états qui nécessitent des adaptations des concepts de modélisation UML. Pour réaliser cet objectif nous avons introduit la notion de sonde d'événements, qui permet de spécifier des communications implicites entre les vues par observation d'événements. Ceci permet de découpler des spécifications qui sont a priori fortement interconnectées, de les concevoir séparément par points de vue, selon les préconisations de la méthode VUML, puis de les intégrer sans avoir à les modifier. Nous avons tout d'abord défini le concept de sonde d'événements, identifié les différents types de sondes avec les paramètres associés, puis défini un ensemble de concepts permettant d'enrichir et de manipuler les sondes. Nous avons ensuite proposé une représentation compatible avec VUML des concepts introduits sous forme d'un profil nommé VxUML (extension de VUML). En plus de la définition des éléments du profil (stéréotypes, valeurs marquées, classes de librairie prédéfinies), nous avons développé en OCL des règles de bonne formation (sémantique statique). Pour illustrer l'intérêt des concepts introduits, nous avons développé une étude de cas en proposant une modélisation par points de vue complète traitant à la fois les aspects structurel et comportemental. Pour valider concrètement notre approche, nous avons développé, selon une approche IDM, un générateur de code qui prend en entrée une spécification de système en VxUML. Ce générateur utilise les techniques de transformation de modèles liées à la génération de code, et notamment les transformations de modèles indépendants de plate-forme (PIM) vers des modèles spécifiques à une plate-forme (PSM), et des modèles PSM vers le code ; il a été développé dans un premier temps avec le langage cible Java. Sur le plan méthodologique, nous avons défini une démarche associée à VxUML, qui complète celle de VUML, en permettant d'utiliser d'une manière méthodique les mécanismes dédiés au traitement du comportement. Désormais, le processus de développement VxUML permet une modélisation par points de vue complète, traitant à la fois les aspects structurel et comportemental. Mots clés : Conception par points de vue, profil VUML, profil VxUML, sonde d'événements, machine à états multivue, composition du comportement

Third International Conference on Technologies for Music Notation and Representation TENOR 2017

The third International Conference on Technologies for Music Notation and Representation seeks to focus on a set of specific research issues associated with Music Notation that were elaborated at the first two editions of TENOR in Paris and Cambridge. The theme of the conference is vocal music, whereas the pre-conference workshops focus on innovative technological approaches to music notation