1,895 research outputs found

    On the integration of trust with negotiation, argumentation and semantics

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    Agreement Technologies are needed for autonomous agents to come to mutually acceptable agreements, typically on behalf of humans. These technologies include trust computing, negotiation, argumentation and semantic alignment. In this paper, we identify a number of open questions regarding the integration of computational models and tools for trust computing with negotiation, argumentation and semantic alignment. We consider these questions in general and in the context of applications in open, distributed settings such as the grid and cloud computing. © 2013 Cambridge University Press.This work was partially supported by the Agreement Technology COST action (IC0801). The authors would like to thank for helpful discussions and comments all participants in the panel on >Trust, Argumentation and Semantics> on 16 December 2009, Agia Napa, CyprusPeer Reviewe

    Multi Agent Systems in Logistics: A Literature and State-of-the-art Review

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    Based on a literature survey, we aim to answer our main question: “How should we plan and execute logistics in supply chains that aim to meet today’s requirements, and how can we support such planning and execution using IT?†Today’s requirements in supply chains include inter-organizational collaboration and more responsive and tailored supply to meet specific demand. Enterprise systems fall short in meeting these requirements The focus of planning and execution systems should move towards an inter-enterprise and event-driven mode. Inter-organizational systems may support planning going from supporting information exchange and henceforth enable synchronized planning within the organizations towards the capability to do network planning based on available information throughout the network. We provide a framework for planning systems, constituting a rich landscape of possible configurations, where the centralized and fully decentralized approaches are two extremes. We define and discuss agent based systems and in particular multi agent systems (MAS). We emphasize the issue of the role of MAS coordination architectures, and then explain that transportation is, next to production, an important domain in which MAS can and actually are applied. However, implementation is not widespread and some implementation issues are explored. In this manner, we conclude that planning problems in transportation have characteristics that comply with the specific capabilities of agent systems. In particular, these systems are capable to deal with inter-organizational and event-driven planning settings, hence meeting today’s requirements in supply chain planning and execution.supply chain;MAS;multi agent systems

    Monte Carlo Method with Heuristic Adjustment for Irregularly Shaped Food Product Volume Measurement

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    Volume measurement plays an important role in the production and processing of food products. Various methods have been proposed to measure the volume of food products with irregular shapes based on 3D reconstruction. However, 3D reconstruction comes with a high-priced computational cost. Furthermore, some of the volume measurement methods based on 3D reconstruction have a low accuracy. Another method for measuring volume of objects uses Monte Carlo method. Monte Carlo method performs volume measurements using random points. Monte Carlo method only requires information regarding whether random points fall inside or outside an object and does not require a 3D reconstruction. This paper proposes volume measurement using a computer vision system for irregularly shaped food products without 3D reconstruction based on Monte Carlo method with heuristic adjustment. Five images of food product were captured using five cameras and processed to produce binary images. Monte Carlo integration with heuristic adjustment was performed to measure the volume based on the information extracted from binary images. The experimental results show that the proposed method provided high accuracy and precision compared to the water displacement method. In addition, the proposed method is more accurate and faster than the space carving method

    Disconnect.Me. User Engagement and Facebook

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    In the beginning of its 10th year of existence Facebook has engaged and connected 1.2 billion monthly active users. This article-based dissertation Disconnect.Me – User Engagement and Facebook approaches this engagement from the opposite direction: disconnection. The research articles focus on social media specific phenomena including leaving Facebook, tactical media works such as Web 2.0 SuicideMachine, memorializing dead Facebook users and Facebook trolling. The media theoretical framework for this study is built around affect theory, software studies, biopolitics as well as different critical studies of new media. The argument is that disconnection is a necessary condition of social media connectivity and exploring social media through disconnection – as an empirical phenomenon, future potential and theoretical notion – helps us to understand how users are engaged with social media, its uses and subsequent business models. The results of the study indicate that engagement is a relation that precedes user participation, a notion often used to conceptualize social media. Furthermore, this engagement turns the focus from users’ actions towards the platform and how the platform actively controls users and their behavior. Facebook aims to engage new users and maintain the old ones by renewing its platform and user interface. User engagement with the platform is thus social but also technical and affective. When engaged, the user is positioned to algorithmic connectivity where machinc processes mine user data. This data is but sold also used to affect and engage other users. In the heart of this study is the notion that our networked engagements matter and disconnection can bring us to the current limits of network culture.Disconnect.Me – Käyttäjien sitoutuminen ja Facebook Kymmenessä vuodessa Facebook on onnistunut sitouttamaan 1.2 miljardia käyttäjää. Artikkeliväitöskirja Disconnect.Me – Käyttäjien sitoutuminen ja Facebook tarkastelee Facebookia näiden käyttäjien menettämisen näkökulmasta. Artikkeleissa tutkimuskohteena ovat muun muassa Facebookin käytön lopettaminen, käyttäjätilin tuhoavat mediataideteokset, muistoprofiilit ja Facebook-trollit. Menetelmällisesti tutkielma nojautuu erilaisiin mediateoreettisiin näkökulmiin painottuen erityisesti affektiteoriaan, software-tutkimukseen, biopolitiikkaan ja kriittiseen uuden median tutkimukseen. Kirjan keskeinen väite on, että tutkimalla käyttäjien menettämistä empiirisenä ilmiönä, tulevaisuuden uhkana sekä teoreettisena käsitteenä on mahdollista ymmärtää, miten käyttäjät sekä sitoutuvat että sitoutetaan osaksi sosiaalisen median toimintatapoja ja liiketoimintamalleja. Tutkimuksen tulokset osoittavat, että käyttäjien sitoutuminen on suhde, joka edeltää käyttäjien osallistumista; tässä suhteessa olennaista on, mitä sosiaalisen median alusta voi tehdä käyttäjälle ei niinkään se, mitä käyttäjät itse sosiaalisessa mediassa tekevät. Uudistamalla lakkaamatta alustaansa ja käyttöliittymäänsä Facebook pyrkiikin sitouttamaan uusia käyttäjiä ja samalla pysäyttämään vanhojen käyttäjien menettämisen. Facebookin alusta tekee käyttäjien sitoutumisesta paitsi sosiaalista myös teknistä ja affektiivista. Sitoutumalla käyttäjä asettuu algoritmisen kontrollin pariin, jossa koneelliset prosessit paitsi määrittelevät ja luokittelevat käyttäjänsä datan keruun tarpeisiin myös tekevät käyttäjistä affektiivisia; käyttäjien toiminta ja sisällöntuotanto houkuttelee toisia käyttäjiä sitoutumaan ja osallistumaan Facebookin toimintaan. Kirjan keskeisenä teemana on käyttäjien sitoutumisen ja sitouttamisen merkityksellisyys paitsi käyttäjille myös Facebookille sekä huomio, että tämän suhteen katkeaminen avaa tutkimuksellisesti digitaalisen mediakulttuurin uusia raja-alueita.Siirretty Doriast

    Sonic Interactions in Virtual Environments: the Egocentric Audio Perspective of the Digital Twin

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    The relationships between the listener, physical world and virtual environment (VE) should not only inspire the design of natural multimodal interfaces but should be discovered to make sense of the mediating action of VR technologies. This chapter aims to transform an archipelago of studies related to sonic interactions in virtual environments (SIVE) into a research field equipped with a first theoretical framework with an inclusive vision of the challenges to come: the egocentric perspective of the auditory digital twin. In a VE with immersive audio technologies implemented, the role of VR simulations must be enacted by a participatory exploration of sense-making in a network of human and non-human agents, called actors. The guardian of such locus of agency is the auditory digital twin that fosters intra-actions between humans and technology, dynamically and fluidly redefining all those configurations that are crucial for an immersive and coherent experience. The idea of entanglement theory is here mainly declined in an egocentric-spatial perspective related to emerging knowledge of the listener's perceptual capabilities. This is an actively transformative relation with the digital twin potentials to create movement, transparency, and provocative activities in VEs. The chapter contains an original theoretical perspective complemented by several bibliographical references and links to the other book chapters that have contributed significantly to the proposal presented here.Comment: 46 pages, 5 figures. Pre-print version of the introduction to the book "Sonic Interactions in Virtual Environments" in press for Springer's Human-Computer Interaction Series, Open Access license. The pre-print editors' copy of the book can be found at https://vbn.aau.dk/en/publications/sonic-interactions-in-virtual-environments - full book info: https://sive.create.aau.dk/index.php/sivebook

    Minimally-intrusive Navigation in Dense Crowds with Integrated Macro and Micro-level Dynamics

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    In mobile robot navigation, despite advancements, the generation of optimal paths often disrupts pedestrian areas. To tackle this, we propose three key contributions to improve human-robot coexistence in shared spaces. Firstly, we have established a comprehensive framework to understand disturbances at individual and flow levels. Our framework provides specialized computational strategies for in-depth studies of human-robot interactions from both micro and macro perspectives. By employing novel penalty terms, namely Flow Disturbance Penalty (FDP) and Individual Disturbance Penalty (IDP), our framework facilitates a more nuanced assessment and analysis of the robot navigation's impact on pedestrians. Secondly, we introduce an innovative sampling-based navigation system that adeptly integrates a suite of safety measures with the predictability of robotic movements. This system not only accounts for traditional factors such as trajectory length and travel time but also actively incorporates pedestrian awareness. Our navigation system aims to minimize disturbances and promote harmonious coexistence by considering safety protocols, trajectory clarity, and pedestrian engagement. Lastly, we validate our algorithm's effectiveness and real-time performance through simulations and real-world tests, demonstrating its ability to navigate with minimal pedestrian disturbance in various environments.Comment: 23 pages, 13 figure
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