75 research outputs found

    A Comprehensive Survey of the Tactile Internet: State of the art and Research Directions

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    The Internet has made several giant leaps over the years, from a fixed to a mobile Internet, then to the Internet of Things, and now to a Tactile Internet. The Tactile Internet goes far beyond data, audio and video delivery over fixed and mobile networks, and even beyond allowing communication and collaboration among things. It is expected to enable haptic communication and allow skill set delivery over networks. Some examples of potential applications are tele-surgery, vehicle fleets, augmented reality and industrial process automation. Several papers already cover many of the Tactile Internet-related concepts and technologies, such as haptic codecs, applications, and supporting technologies. However, none of them offers a comprehensive survey of the Tactile Internet, including its architectures and algorithms. Furthermore, none of them provides a systematic and critical review of the existing solutions. To address these lacunae, we provide a comprehensive survey of the architectures and algorithms proposed to date for the Tactile Internet. In addition, we critically review them using a well-defined set of requirements and discuss some of the lessons learned as well as the most promising research directions

    Energy-based control approaches in human-robot collaborative disassembly

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    Building Information Modeling (BIM) for existing buildings - literature review and future needs

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    Abstract not availableRebekka Volk, Julian Stengel, Frank Schultman

    Proceedings of the Vision Zero Summit 2019 12–14 November 2019 Helsinki, Finland

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    The Vision Zero Summit was held on 12–14 November 2019 in Helsinki Finland, and organized by the Finnish Institute of Occupational Health, with the support of our partners. Vision Zero is a strategy and a holistic mindset. It is continuous improvement of safety, health, and wellbeing at work, not just a numerical goal. This summit focused on discussing different aspects of Vision Zero, taking the Vision Zero thinking and actions to the next level, and sharing best practices and lessons learned. One theme of the Summit was worded as Rethinking Vision Zero, which is a reminder that there are many perspectives to Vision Zero. Vision Zero Summit was one of the side events of Finland’s Presidency of the Council of the EU. One of the Vision Zero Summit’s goal was to provide new ideas and perspectives, as well as strengthen participants professional networks. This Proceedings publication is a compilation of the papers presented on 12–14 November 2019 in the Vision Zero Summit 2019 in Helsinki

    Nineteenth Annual Conference on Manual Control

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    The well-tempered android: philosophical posthumanism in science fiction cinema.

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    This dissertation examines philosophical posthumanism as a means for critical analysis of the interaction between humans and nonhuman androids in select science fiction cinematic universes. The interaction is analyzed through several facets, notably the interactions between humans and nonhuman androids, particularly as interactions between the human and nonhuman are often sites of violence. Chapter one is an introduction. Chapter two describes the development of philosophical posthumanism from humanism, also including an analysis of philosophical posthumanism, and how it can be used as a critical lens. Chapter three begins an analysis of science fiction cinema by examining the Blade Runner films and HBO’s Westworld series (season one). Chapter four discusses director Ridley Scott’s Alien movies, and the Star Wars films. Chapter five provides an overview of previous discussion, along with introducing some other, more discrete films that have posthumanistic methods/ideas as main plot points. The conclusion also explores ideas about how the science fiction may have implications for real-world technological advances and living in the age of the Anthropocene

    Service-based Fault Tolerance for Cyber-Physical Systems: A Systems Engineering Approach

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    Cyber-physical systems (CPSs) comprise networked computing units that monitor and control physical processes in feedback loops. CPSs have potential to change the ways people and computers interact with the physical world by enabling new ways to control and optimize systems through improved connectivity and computing capabilities. Compared to classical control theory, these systems involve greater unpredictability which may affect the stability and dynamics of the physical subsystems. Further uncertainty is introduced by the dynamic and open computing environments with rapidly changing connections and system configurations. However, due to interactions with the physical world, the dependable operation and tolerance of failures in both cyber and physical components are essential requirements for these systems.The problem of achieving dependable operations for open and networked control systems is approached using a systems engineering process to gain an understanding of the problem domain, since fault tolerance cannot be solved only as a software problem due to the nature of CPSs, which includes close coordination among hardware, software and physical objects. The research methodology consists of developing a concept design, implementing prototypes, and empirically testing the prototypes. Even though modularity has been acknowledged as a key element of fault tolerance, the fault tolerance of highly modular service-oriented architectures (SOAs) has been sparsely researched, especially in distributed real-time systems. This thesis proposes and implements an approach based on using loosely coupled real-time SOA to implement fault tolerance for a teleoperation system.Based on empirical experiments, modularity on a service level can be used to support fault tolerance (i.e., the isolation and recovery of faults). Fault recovery can be achieved for certain categories of faults (i.e., non-deterministic and aging-related) based on loose coupling and diverse operation modes. The proposed architecture also supports the straightforward integration of fault tolerance patterns, such as FAIL-SAFE, HEARTBEAT, ESCALATION and SERVICE MANAGER, which are used in the prototype systems to support dependability requirements. For service failures, systems rely on fail-safe behaviours, diverse modes of operation and fault escalation to backup services. Instead of using time-bounded reconfiguration, services operate in best-effort capabilities, providing resilience for the system. This enables, for example, on-the-fly service changes, smooth recoveries from service failures and adaptations to new computing environments, which are essential requirements for CPSs.The results are combined into a systems engineering approach to dependability, which includes an analysis of the role of safety-critical requirements for control system software architecture design, architectural design, a dependability-case development approach for CPSs and domain-specific fault taxonomies, which support dependability case development and system reliability analyses. Other contributions of this work include three new patterns for fault tolerance in CPSs: DATA-CENTRIC ARCHITECTURE, LET IT CRASH and SERVICE MANAGER. These are presented together with a pattern language that shows how they relate to other patterns available for the domain

    Aerial Network Assistance Systems for Post-Disaster Scenarios : Topology Monitoring and Communication Support in Infrastructure-Independent Networks

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    Communication anytime and anywhere is necessary for our modern society to function. However, the critical network infrastructure quickly fails in the face of a disaster and leaves the affected population without means of communication. This lack can be overcome by smartphone-based emergency communication systems, based on infrastructure-independent networks like Delay-Tolerant Networks (DTNs). DTNs, however, suffer from short device-to-device link distances and, thus, require multi-hop routing or data ferries between disjunct parts of the network. In disaster scenarios, this fragmentation is particularly severe because of the highly clustered human mobility behavior. Nevertheless, aerial communication support systems can connect local network clusters by utilizing Unmanned Aerial Vehicles (UAVs) as data ferries. To facilitate situation-aware and adaptive communication support, knowledge of the network topology, the identification of missing communication links, and the constant reassessment of dynamic disasters are required. These requirements are usually neglected, despite existing approaches to aerial monitoring systems capable of detecting devices and networks. In this dissertation, we, therefore, facilitate the coexistence of aerial topology monitoring and communications support mechanisms in an autonomous Aerial Network Assistance System for infrastructure-independent networks as our first contribution. To enable system adaptations to unknown and dynamic disaster situations, our second contribution addresses the collection, processing, and utilization of topology information. For one thing, we introduce cooperative monitoring approaches to include the DTN in the monitoring process. Furthermore, we apply novel approaches for data aggregation and network cluster estimation to facilitate the continuous assessment of topology information and an appropriate system adaptation. Based on this, we introduce an adaptive topology-aware routing approach to reroute UAVs and increase the coverage of disconnected nodes outside clusters. We generalize our contributions by integrating them into a simulation framework, creating an evaluation platform for autonomous aerial systems as our third contribution. We further increase the expressiveness of our aerial system evaluation, by adding movement models for multicopter aircraft combined with power consumption models based on real-world measurements. Additionally, we improve the disaster simulation by generalizing civilian disaster mobility based on a real-world field test. With a prototypical system implementation, we extensively evaluate our contributions and show the significant benefits of cooperative monitoring and topology-aware routing, respectively. We highlight the importance of continuous and integrated topology monitoring for aerial communications support and demonstrate its necessity for an adaptive and long-term disaster deployment. In conclusion, the contributions of this dissertation enable the usage of autonomous Aerial Network Assistance Systems and their adaptability in dynamic disaster scenarios

    Exploring the relationship between outer space and world politics: English School and regime theory perspectives

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    This thesis uses regime theory and the English School of International Relations (and particularly the social constructivist reformulation by Buzan in From International to World Society: English School Theory and the Social Structure of Globalisation 2004) to address the question: Why have actors decided to cooperate on outer space issues, and what does that cooperation tell us about wider international politics and international society. Rational actors have at times determined that it is in their interest to coordinate activity for outer space. This coordination has led (either intentionally or unintentionally) to the creation of international regimes, and those regimes have conversely come to exert influence over actors' interests and behavior over time. Processes within international society (such as the rise, evolution, and decline of international society institutions, and shifts between pluralism and solidarism) also influence - and are influenced by - outer space politics. The thesis focuses on five case studies: geosynchronous orbit, the International Space Station, Global Navigational Satellite Systems, the company Sea Launch, and comets and asteroids. Pre-existing outer space treaties ("diffuse regimes") have established basic understandings between states about governance over outer space, and implicit or explicit regimes have also evolved to facilitate coordination amongst actors on the specific issue-areas of each case study. The tools used by regime theorists help explain the development of these various regimes and the relationship between them; however, because of regime theory's relatively narrow focus (on actors' rational interests in specific issue-areas) it provides few insights into how outer space politics are embedded in wider world politics and international society. An English School approach expands the analysis and puts into perspective how the Space Race was mutually constitutive of Cold War pluralist international society, and how space cooperation and commercialization over time also reflected and reinforced globalization and cooperative international society. However it is extremely difficult to operationalize the English School in order to draw more specific explanatory conclusions about individual case studies. It is necessary to use both approaches together to develop a thorough explanation of actors' behavior with regards to outer space politics, as well as an understanding of how outer space politics relate to wider world politics
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