Automated design of robust discriminant analysis classifier for foot pressure lesions using kinematic data

In the recent years, the use of motion tracking systems for acquisition of functional biomechanical gait data, has received increasing interest due to the richness and accuracy of the measured kinematic information. However, costs frequently restrict the number of subjects employed, and this makes the dimensionality of the collected data far higher than the available samples. This paper applies discriminant analysis algorithms to the classification of patients with different types of foot lesions, in order to establish an association between foot motion and lesion formation. With primary attention to small sample size situations, we compare different types of Bayesian classifiers and evaluate their performance with various dimensionality reduction techniques for feature extraction, as well as search methods for selection of raw kinematic variables. Finally, we propose a novel integrated method which fine-tunes the classifier parameters and selects the most relevant kinematic variables simultaneously. Performance comparisons are using robust resampling techniques such as Bootstrap$632+$and k-fold cross-validation. Results from experimentations with lesion subjects suffering from pathological plantar hyperkeratosis, show that the proposed method can lead to$sim 96$correct classification rates with less than 10% of the original features

Pathway to Future Symbiotic Creativity

This report presents a comprehensive view of our vision on the development path of the human-machine symbiotic art creation. We propose a classification of the creative system with a hierarchy of 5 classes, showing the pathway of creativity evolving from a mimic-human artist (Turing Artists) to a Machine artist in its own right. We begin with an overview of the limitations of the Turing Artists then focus on the top two-level systems, Machine Artists, emphasizing machine-human communication in art creation. In art creation, it is necessary for machines to understand humans' mental states, including desires, appreciation, and emotions, humans also need to understand machines' creative capabilities and limitations. The rapid development of immersive environment and further evolution into the new concept of metaverse enable symbiotic art creation through unprecedented flexibility of bi-directional communication between artists and art manifestation environments. By examining the latest sensor and XR technologies, we illustrate the novel way for art data collection to constitute the base of a new form of human-machine bidirectional communication and understanding in art creation. Based on such communication and understanding mechanisms, we propose a novel framework for building future Machine artists, which comes with the philosophy that a human-compatible AI system should be based on the "human-in-the-loop" principle rather than the traditional "end-to-end" dogma. By proposing a new form of inverse reinforcement learning model, we outline the platform design of machine artists, demonstrate its functions and showcase some examples of technologies we have developed. We also provide a systematic exposition of the ecosystem for AI-based symbiotic art form and community with an economic model built on NFT technology. Ethical issues for the development of machine artists are also discussed

Occlusion handling in correlation-based matching

In binocular stereovision, the accuracy of the 3D reconstruction depends on the accuracy of matching results. Consequently, matching is an important task. Our first goal is to present a state of the art of matching methods. We define a generic and complete algorithm based on essential components to describe most of the matching methods. Occlusions are one of the most important difficulties and we also present a state of the art of methods dealing with occlusions. Finally, we propose matching methods using two correlation measures to take into account occlusions. The results highlight the best method that merges two disparity maps obtained with two different measures.En stéréovision binoculaire, la mise en correspondance est une étape cruciale pour réaliser la reconstruction 3D de la scène. De très nombreuses publications traitent ce problème. Ainsi, le premier objectif est de proposer un état de l'art des méthodes de mise en correspondance. Nous synthétisons cette étude en présentant un algorithme générique complet faisant intervenir des éléments constituants permettant de décrire les différentes étapes de la recherche de correspondances. Une des plus grandes difficultés, au cours de l'appariement, provient des occultations. C'est pourquoi le second objectif est de présenter un état de l'art des méthodes qui prennent en compte cette difficulté. Enfin, le dernier objectif est de présenter de nouvelles méthodes hybrides, dans le cadre des méthodes locales à base de corrélation. Nous nous appuyons sur l'utilisation de deux mesures de corrélation permettant de mieux prendre en compte le problème des occultations. Les résultats mettent en évidence la meilleure méthode qui consiste à fusionner deux cartes de disparités obtenues avec des mesures différentes

Experiential Perspectives on Sound and Music for Virtual Reality Technologies

This thesis examines the intersection of sound, music, and virtuality within current and next-generation virtual reality technologies, with a specific focus on exploring the experiential perspectives of users and participants within virtual experiences. The first half of the thesis constructs a new theoretical model for examining intersections of sound and virtual experience. In Chapter 1, a new framework for virtual experience is constructed consisting of three key elements: virtual hardware (e.g., displays, speakers); virtual software (e.g., rules and systems of interaction); and virtual externalities (i.e., physical spaces used for engaging in virtual experiences). Through using and applying this new model, methodical examinations of complex virtual experiences are possible. Chapter 2 examines the second axis of the thesis through constructing an understanding of how sound is designed, implemented, and received within virtual reality. The concept of soundscapes is explored in the context of experiential perspectives, serving as a useful approach for describing received auditory phenomena. Auditory environments are proposed as a new model for exploring how auditory phenomena can be broadcast to audiences. Chapter 3 explores how inauthenticity within sound can impact users in virtual experience and uses authenticity to critically examine challenges surrounding sound in virtual reality. Constructions of authenticity in music performance are used to illustrate how authenticity is constructed within virtual experience. Chapter 4 integrates music into the understanding of auditory phenomena constructed throughout the thesis: music is rarely part of the created world in a virtual experience. Rather, it is typically something which only the audience – as external observers of the created world – can hear. Therefore, music within immersive virtual reality may be challenging as the audience is placed within the created world.The second half of this thesis uses this theoretical model to consider contemporary and future approaches to virtual experiences. Chapter 5 constructs a series of case studies to demonstrate the use of the framework as a trans-medial and intra/inter-contextual tool of analysis. Through use of the framework, varying approaches to implementation of sound and music in virtual reality technologies are considered, which reveals trans-medial commonalities of immersion and engagement with virtual experiences through sound. Chapter 6 examines near-future technologies, including brain-computer interfaces and other full-immersion technologies, to identify key issues in the design and implementation of future virtual experiences and suggest how interdisciplinary collaboration may help to develop solutions to these issues. Chapter 7 considers how the proposed model for virtuality might allow for methodical examination of similar issues within other fields, such as acoustics and architecture, and examines the ethical considerations that may become relevant as virtual technology develops within the 21st Century.This research explores and rationalises theoretical models of virtuality and sound. This permits designers and developers to improve the implementation of sound and music in virtual experiences for the purpose of improving user outcomes.<br/

Dysbiosis in inflammatory bowel disease promotes clostridium difficile colonization

Research into the gut microbiome has revealed the widespread influence that microbial species have on their host. Host genetics and environmental factors influence the abundance and diversity of the bacterial species living within the gastrointestinal tract. When the normal composition of the gut microbiota is altered, a dysbiotic state incurs. Inflammatory bowel disease (IBD) is a chronic/relapsing inflammatory disorder of the intestinal mucosa, which is characterized by a state of dysbiosis. Despite the large amount of information studying the role dysbiosis has in the pathogenesis of IBD, it is not clear how the altered microbial composition of the gut in IBD patients leads to susceptibility to enteric pathogens such as Clostridium difficile. This study aims to highlight the features of the gastrointestinal tract that are modified as a result of dysbiosis in the IBD population, and how these features facilitate colonization by C. difficile and symptom development. Review of the available literature demonstrated that the depletion of Clostridial cluster XIVa in IBD-associated dysbiosis alters bile acid metabolism and butyrate fermentation in the colon, ultimately promoting germination of C. difficile spores and weakening the gut's immune response against toxin-mediated inflammation. From continued research into the gut microbiota, more will be understood of how these microbial organisms influence human health and disease

3D Recording and Interpretation for Maritime Archaeology

This open access peer-reviewed volume was inspired by the UNESCO UNITWIN Network for Underwater Archaeology International Workshop held at Flinders University, Adelaide, Australia in November 2016. Content is based on, but not limited to, the work presented at the workshop which was dedicated to 3D recording and interpretation for maritime archaeology. The volume consists of contributions from leading international experts as well as up-and-coming early career researchers from around the globe. The content of the book includes recording and analysis of maritime archaeology through emerging technologies, including both practical and theoretical contributions. Topics include photogrammetric recording, laser scanning, marine geophysical 3D survey techniques, virtual reality, 3D modelling and reconstruction, data integration and Geographic Information Systems. The principal incentive for this publication is the ongoing rapid shift in the methodologies of maritime archaeology within recent years and a marked increase in the use of 3D and digital approaches. This convergence of digital technologies such as underwater photography and photogrammetry, 3D sonar, 3D virtual reality, and 3D printing has highlighted a pressing need for these new methodologies to be considered together, both in terms of defining the state-of-the-art and for consideration of future directions. As a scholarly publication, the audience for the book includes students and researchers, as well as professionals working in various aspects of archaeology, heritage management, education, museums, and public policy. It will be of special interest to those working in the field of coastal cultural resource management and underwater archaeology but will also be of broader interest to anyone interested in archaeology and to those in other disciplines who are now engaging with 3D recording and visualization

Augmented Reality

Augmented Reality (AR) is a natural development from virtual reality (VR), which was developed several decades earlier. AR complements VR in many ways. Due to the advantages of the user being able to see both the real and virtual objects simultaneously, AR is far more intuitive, but it's not completely detached from human factors and other restrictions. AR doesn't consume as much time and effort in the applications because it's not required to construct the entire virtual scene and the environment. In this book, several new and emerging application areas of AR are presented and divided into three sections. The first section contains applications in outdoor and mobile AR, such as construction, restoration, security and surveillance. The second section deals with AR in medical, biological, and human bodies. The third and final section contains a number of new and useful applications in daily living and learning

The Future of Humanoid Robots

This book provides state of the art scientific and engineering research findings and developments in the field of humanoid robotics and its applications. It is expected that humanoids will change the way we interact with machines, and will have the ability to blend perfectly into an environment already designed for humans. The book contains chapters that aim to discover the future abilities of humanoid robots by presenting a variety of integrated research in various scientific and engineering fields, such as locomotion, perception, adaptive behavior, human-robot interaction, neuroscience and machine learning. The book is designed to be accessible and practical, with an emphasis on useful information to those working in the fields of robotics, cognitive science, artificial intelligence, computational methods and other fields of science directly or indirectly related to the development and usage of future humanoid robots. The editor of the book has extensive R&D experience, patents, and publications in the area of humanoid robotics, and his experience is reflected in editing the content of the book