Learning Neural Implicit Representations with Surface Signal Parameterizations

Neural implicit surface representations have recently emerged as popular alternative to explicit 3D object encodings, such as polygonal meshes, tabulated points, or voxels. While significant work has improved the geometric fidelity of these representations, much less attention is given to their final appearance. Traditional explicit object representations commonly couple the 3D shape data with auxiliary surface-mapped image data, such as diffuse color textures and fine-scale geometric details in normal maps that typically require a mapping of the 3D surface onto a plane, i.e., a surface parameterization; implicit representations, on the other hand, cannot be easily textured due to lack of configurable surface parameterization. Inspired by this digital content authoring methodology, we design a neural network architecture that implicitly encodes the underlying surface parameterization suitable for appearance data. As such, our model remains compatible with existing mesh-based digital content with appearance data. Motivated by recent work that overfits compact networks to individual 3D objects, we present a new weight-encoded neural implicit representation that extends the capability of neural implicit surfaces to enable various common and important applications of texture mapping. Our method outperforms reasonable baselines and state-of-the-art alternatives

Smartbook: Semantics Inside

This paper presents a vision for the future of the e-books which entails further development of technologies that will facilitate the creation and use of a new generation of "smart" books: e-books that are evolving, highly interactive, customisable, adaptable, intelligent, and furnished with a rich set of collaborative authoring and reading support services. The proposed set of tools will be integrated into an intelligent framework for collaborative book authoring and experiencing called SmartBook. The paper promotes the idea that the semantic technologies, intensively developed recently in connection with the Semantic Web initiative, can be incorporated in the book and become the key factor of making it "smarter"

Language data and project specialist: A new modular profile for graduates in language-related disciplines. UPSKILLS Intellectual output 1.6

The UPSKILLS needs analysis explored the current academic offer in language- and linguistics-related fields (modern languages and cultures, translation, general linguistics, etc.) and the requirements the job market has for graduates in these areas. The analysis highlighted the need for a new skill set and a new mind frame to meet the demands as well as the professional challenges of the industry. Taking into consideration the results of the individual components of the needs analysis, this final report outlines a new professional profile, that of the language data and project specialist, and includes a detailed description of the knowledge, skills and competences that present-day and future graduates in languages and linguistics should obtain to improve their employability in the digital business sector

Internet Architecture and Disability

The Internet is essential for education, employment, information, and cultural and democratic participation. For tens of millions of people with disabilities in the United States, barriers to accessing the Internet—including the visual presentation of information to people who are blind or visually impaired, the aural presentation of information to people who are deaf or hard of hearing, and the persistence of Internet technology, interfaces, and content without regard to prohibitive cognitive load for people with cognitive and intellectual disabilities—collectively pose one of the most significant civil rights issues of the information age. Yet disability law lacks a comprehensive theoretical approach for fully facilitating Internet accessibility. The prevailing doctrinal approach to Internet accessibility seeks to treat websites as metaphorical “places” subject to Title III of the Americans with Disabilities Act (ADA), which requires places of public accommodations to be accessible to people with disabilities. While this place-centric approach to Title III has succeeded to a significant degree in making websites accessible over the last two decades, large swaths of the Internet—more broadly construed to include Internet technologies beyond websites—remain inaccessible to millions of people with a variety of disabilities. As limitations of a place-based approach to Title III become clearer, a new framework for disability law is needed in an increasingly intermediated Internet. Leveraging the Internet-law literature on perspectives, this article recognizes the place-centric approach to Title III as normatively and doctrinally “internal,” in the terminology of Internet-law scholars. It offers a framework for supplementing this internal approach with an external approach that contemplates the layered architecture of the Internet, including its constituent content, web and non-web applications, access networks operated by Internet service providers, and devices and the role of disability and other bodies of law, particularly including telecommunications law and attendant policy issues, such as net neutrality, in making them accessible

Internet Architecture and Disability

The Internet is essential for education, employment, information, and cultural and democratic participation. For tens of millions of people with disabilities in the United States, barriers to accessing the Internet—including the visual presentation of information to people who are blind or visually impaired, the aural presentation of information to people who are deaf or hard of hearing, and the persistence of Internet technology, interfaces, and content without regard to prohibitive cognitive load for people with cognitive and intellectual disabilities—collectively pose one of the most significant civil rights issues of the information age. Yet disability law lacks a comprehensive theoretical approach for fully facilitating Internet accessibility. The prevailing doctrinal approach to Internet accessibility seeks to treat websites as metaphorical “places” subject to Title III of the Americans with Disabilities Act (ADA), which requires places of public accommodations to be accessible to people with disabilities. While this place-centric approach to Title III has succeeded to a significant degree in making websites accessible over the last two decades, large swaths of the Internet—more broadly construed to include Internet technologies beyond websites—remain inaccessible to millions of people with a variety of disabilities. As limitations of a place-based approach to Title III become clearer, a new framework for disability law is needed in an increasingly intermediated Internet. Leveraging the Internet-law literature on perspectives, this article recognizes the place-centric approach to Title III as normatively and doctrinally “internal,” in the terminology of Internet-law scholars. It offers a framework for supplementing this internal approach with an external approach that contemplates the layered architecture of the Internet, including its constituent content, web and non-web applications, access networks operated by Internet service providers, and devices and the role of disability and other bodies of law, particularly including telecommunications law and attendant policy issues, such as net neutrality, in making them accessible

Doctor of Philosophy

dissertationConfocal microscopy has become a popular imaging technique in biology research in recent years. It is often used to study three-dimensional (3D) structures of biological samples. Confocal data are commonly multichannel, with each channel resulting from a different fluorescent staining. This technique also results in finely detailed structures in 3D, such as neuron fibers. Despite the plethora of volume rendering techniques that have been available for many years, there is a demand from biologists for a flexible tool that allows interactive visualization and analysis of multichannel confocal data. Together with biologists, we have designed and developed FluoRender. It incorporates volume rendering techniques such as a two-dimensional (2D) transfer function and multichannel intermixing. Rendering results can be enhanced through tone-mappings and overlays. To facilitate analyses of confocal data, FluoRender provides interactive operations for extracting complex structures. Furthermore, we developed the Synthetic Brainbow technique, which takes advantage of the asynchronous behavior in Graphics Processing Unit (GPU) framebuffer loops and generates random colorizations for different structures in single-channel confocal data. The results from our Synthetic Brainbows, when applied to a sequence of developing cells, can then be used for tracking the movements of these cells. Finally, we present an application of FluoRender in the workflow of constructing anatomical atlases

Investigating the success of E-learning in secondary schools: The case of the Kingdom of Bahrain

This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel UniversityAs a result of the advances in information and communication technology, E-Learning has been integrated as an essential element in educational settings. Despite its successful implementation, a significant number of E-Learning projects fail to achieve their goals. This has motivated researchers and practitioners to study the reasons for failure and success and the factors that impact E-Learning. This research attempts to investigate the factors that influence the implementation and development of E-Learning and the most appropriate framework for secondary schools in Bahrain. The research adopted a quantitative approach to examine both teachers’ and students’ perceptions of critical factors in secondary schools in the Kingdom of Bahrain. A total of 540 respondents completed the survey-based questionnaire. The results revealed that there are four sets of factors which influence the success of E-Learning in the school education sector. These are: students’ characteristics (computers skills; motivation and attitudes); teachers’ characteristics (attitudes; control of technology and pedagogy and teaching style); technology (quality of technology and effectiveness of infrastructure) and design and content (perceived ease of use and quality of content). In addition, the findings show that there are some differences in perceptions amongst teachers according to gender, specialization, teaching experience and E-Learning experience. Similarly, the findings show that there are some differences in perceptions amongst students according to gender, specialization and level of study (years in school). The main contribution of this research is that it addresses the success of E-Learning in the schools sector in Bahrain and in the Arab region as this area of research lacks theoretical and empirical studies. In addition, the research proposes a conceptual framework that integrates the critical factors and demographic variables. The proposed conceptual framework contributes to the knowledge of E-Learning success by creating a guide for educational institutions and governments for better development and implementation, serving as a planning tool for new E-Learning projects and as an assessment mode for the efficacy of existing projects

Improving Usability in Procedural Modeling

This work presents new approaches and algorithms for procedural modeling geared towards user convenience and improving usability, in order to increase artists’ productivity. Procedural models create geometry for 3D models from sets of rules. Existing approaches that allow to model trees, buildings, and terrain are reviewed and possible improvements are discussed. A new visual programming language for procedural modeling is discussed, where the user connects operators to visual programs called model graphs. These operators create geometry with textures, assign or evaluate variables or control the sequence of operations. When the user moves control points using the mouse in 3D space, the model graph is executed to change the geometry interactively. Thus, model graphs combine the creativity of freehand modeling with the power of programmed modeling while displaying the program structure more clearly than textbased approaches. Usability is increased as a result of these advantages. Also, an interactive editor for botanical trees is demonstrated. In contrast to previous tree modeling systems, we propose linking rules, parameters and geometry to semantic entities. This has the advantage that problems of associating parameters and instances are completely avoided. When an entity is clicked in the viewport, its parameters are displayed immediately, changes are applied to selected entities, and viewport editing operations are reflected in the parameter set. Furthermore, we store the entities in a hierarchical data structure and allow the user to activate recursive traversal via selection options for all editing operations. The user may choose to apply viewport or parameter changes to a single entity or many entities at once, and only the geometry for the affected entities needs to be updated. The proposed user interface simplifies the modeling process and increases productivity. Interactive editing approaches for 3D models often allow more precise control over a model than a global set of parameters that is used to generate a shape. However, usually scripted procedural modeling generates shapes directly from a fixed set of parameters, and interactive editing mostly uses a fixed set of tools. We propose to use scripts not only to generate models, but also for manipulating the models. A base script would set up the state of an object, and tool scripts would modify that state. The base script and the tool scripts generate geometry when necessary. Together, such a collection of scripts forms a template, and templates can be created for various types of objects. We examine how templates simplify the procedural modeling workflow by allowing for editing operations that are context-sensitive, flexible and powerful at the same time. Many algorithms have been published that produce geometry for fictional landscapes. There are algorithms which produce terrain with minimal setup time, allowing to adapt the level of detail as the user zooms into the landscape. However, these approaches lack plausible river networks, and algorithms that create eroded terrain with river networks require a user to supervise creation and minutes or hours of computation. In contrast to that, this work demonstrates an algorithm that creates terrain with plausible river networks and adaptive level of detail with no more than a few seconds of preprocessing. While the system can be configured using parameters, this text focuses on the algorithm that produces the rivers. However, integrating more tools for user-controlled editing of terrain would be possible.Verbesserung der Usability bei prozeduraler Modellierung Ziel der vorliegenden Arbeit ist es, prozedurale Modellierung durch neue neue Ansätze und Algorithmen einfacher, bequemer und anwendungsfreundlicher zu machen, und damit die Produktivität der Künstler zu erhöhen. Diese Anforderungen werden häufig unter dem Stichwort Usability zusammengefasst. Prozedurale Modelle spezifizieren 3D-Modelle über Regeln. Existierende Ansätze für Bäume, Gebäude und Terrain werden untersucht und es werden mögliche Verbesserungen diskutiert. Eine neue visuelle Programmiersprache für prozedurale Modelle wird vorgestellt, bei der Operatoren zu Modellgraphen verschaltet werden. Die Operatoren erzeugen texturierte Geometrie, weisen Variablen zu und werten sie aus, oder sie steuern den Ablauf der Operationen. Wenn der Benutzer Kontrollpunkte im Viewport mit der Maus verschiebt, wird der Modellgraph ausgeführt, um interaktiv neue Geometrie für das Modell zu erzeugen. Modellgraphen kombinieren die kreativen Möglichkeiten des freihändigen Editierens mit der Mächtigkeit der prozeduralen Modellierung. Darüber hinaus sind Modellgraphen eine visuelle Programmiersprache und stellen die Struktur der Algorithmen deutlicher dar als textbasierte Programmiersprachen. Als Resultat dieser Verbesserungen erhöht sich die Usability. Ein interaktiver Editor für botanische Bäume wird ebenfalls vorgestellt. Im Gegensatz zu früheren Ansätzen schlagen wir vor, Regeln, Parameter und Geometrie zu semantischen Entitäten zu verschmelzen. Auf diese Weise werden Zuordnungsprobleme zwischen Parametern und deren Instanzen komplett vermieden. Wenn im Viewport eine Instanz angeklickt wird, werden sofort ihre Parameter angezeigt, alle Änderungen wirken sich direkt auf die betroffenen Instanzen aus, und Änderungen im Viewport werden sofort in den Parametern reflektiert. Darüber hinaus werden die Entitäten in einer hierarchischen Datenstruktur gespeichert und alle Änderungen können rekursiv auf der Hierarchie ausgeführt werden. Dem Benutzer werden Selektionsoptionen zur Verfügung gestellt, über die er Änderungen an den Parametern oder Änderungen im Viewport an einzelnen oder vielen Instanzen gleichzeitig vornehmen kann. Anschließend muss das System nur die Geometrie der betroffenen Instanzen aktualisieren. Auch hier ist das Ziel, das User Interface möglichst an den Bedürfnissen des Benutzers auszurichten, um Vereinfachungen und eine Erhöhung der Produktivität zu erreichen. Interaktive Editieransätze für 3D-Modelle erlauben häufig eine präzisere Kontrolle über ein Modell als ein globaler Parametersatz, der für die Erzeugung des Modells genutzt wird. Trotzdem erzeugen prozedurale Modellierskripte ihre Modelle meist direkt aus einem festen Parametersatz, während interaktive Tools meist mit hartkodierten Operationen arbeiten. Wir schlagen vor, Skripte nicht nur zur Erzeugung der Modelle zu verwenden, sondern auch um die erzeugten Modelle zu editieren. Ein Basisskript soll die Statusinformationen eines Objekts anlegen, während weitere Skripte diesen Status verändern und passende Geometrie erzeugen. Diese Skripte bilden dann ein Template zum Erzeugen einer Klasse von Objekten. Verschiedene Objekttypen können jeweils ihr eigenes Template haben. Wir zeigen, wie Templates den Workflow mit prozeduralen Modellen vereinfachen können, indem Operationen geschaffen werden, die gleichzeitig kontext-sensitiv, mächtig und flexibel sind. Es existiert eine Reihe von Verfahren, um Geometrie für synthetische Landschaften zu erzeugen. Ein Teil der Algorithmen erzeugt Geometrie mit minimaler Vorberechnung und erlaubt es, den Detailgrad der Landschaft interaktiv an die Perspektive anzupassen. Leider fehlen den so erzeugten Landschaften plausible Flussnetze. Algorithmen, die erodiertes Terrain mit Flussnetzen erzeugen, müssen aufwendig vom Benutzer überwacht werden und brauchen Minuten oder Stunden Rechenzeit. Im Gegensatz dazu stellen wir einen Algorithmus vor, der plausible Flussnetze erzeugt, während sich der Betrachter interaktiv durch die Szene bewegt. Das System kann über Parameter gesteuert werden, aber der Fokus liegt auf dem Algorithmus zur Erzeugung der Flüsse. Dennoch wäre es möglich, Tools zum benutzergesteuerten Editieren von Terrain zu integrieren

Evaluating Extensible 3D (X3D) Graphics For Use in Software Visualisation

3D web software visualisation has always been expensive, special purpose, and hard to program. Most of the technologies used require large amounts of scripting, are not reliable on all platforms, are binary formats, or no longer maintained. We can make end-user web software visualisation of object-oriented programs cheap, portable, and easy by using Extensible (X3D) 3D Graphics, which is a new open standard. In this thesis we outline our experience with X3D and discuss the suitability of X3D as an output format for software visualisation