829 research outputs found

    LIPIcs, Volume 261, ICALP 2023, Complete Volume

    Get PDF
    LIPIcs, Volume 261, ICALP 2023, Complete Volum

    Risk identification and assessment of human-machine conflict

    Get PDF
    The process industries are fully embracing digitalization and artificial intelligence (AI). Industry 4.0 has also transformed the production structures in the process industries to increase productivity and profitability; however, this has also led to emerging risks. The rapid growth and transformation have created gaps and challenges in various aspects, for example, information technology (IT) vs. operation technology (OT), human vs. AI, and traditional statistical analysis vs. machine learning. A notable issue is the apparent differences in decision-making between humans and machines, primarily when they work together. Contradictory observations, states, goals, and actions may lead to conflict between these two decision-makers. Such conflicts have triggered numerous catastrophes in recent years. Moreover, conflicts may become even more elusive and confusing under external forces, e.g., cyberattacks. Therefore, this thesis focuses on human-machine conflict. Five research tasks are conducted to explore the risk of human-machine conflict. More specifically, the thesis presents a systematic literature review on the impact of digitalization on process safety, highlights the myths and misconceptions of data modeling on process safety analysis, and attempts to clarify associated concepts in the area of human-machine conflict. In addition, the thesis summarizes the causes of conflicts and generalizes the mathematical expressions of the causes. It illustrates the evolutional process of conflicts, proposes the measurement of conflicts, develops the risk assessment model of conflicts, and explores the condition of conflict convergence, divergence, and resolution. The thesis also iii demonstrates the proposed methodology and risk models in process systems, for example, the two-phase separator and the Continuous Stirred Tank Reactor (CSTR). It verifies the conflict between manual and automated control (e.g., proportional-integral-derivative control (PID) and model predictive control (MPC)). This thesis proves that conflict is another more profound and implicit phenomenon that raises risks more rapidly and severely. Conflicts are highly associated with faults and failures. Various factors can trigger human-machine conflict, including sensor faults, cyberattacks, human errors, and sabotage. This thesis attempts to provide the readers with a clear picture of the human-machine conflict, alerts the industry and academia about the risk of human-machine conflict, and emphasizes human-centered design

    A framework for manufacturing system reconfiguration and optimisation utilising digital twins and modular artificial intelligence

    Get PDF
    Digital twins and artificial intelligence have shown promise for improving the robustness, responsiveness, and productivity of industrial systems. However, traditional digital twin approaches are often only employed to augment single, static systems to optimise a particular process. This article presents a paradigm for combining digital twins and modular artificial intelligence algorithms to dynamically reconfigure manufacturing systems, including the layout, process parameters, and operation times of numerous assets to allow system decision-making in response to changing customer or market needs. A knowledge graph has been used as the enabler for this system-level decision-making. A simulation environment has been constructed to replicate the manufacturing process, with the example here of an industrial robotic manufacturing cell. The simulation environment is connected to a data pipeline and an application programming interface to assist the integration of multiple artificial intelligence methods. These methods are used to improve system decision-making and optimise the configuration of a manufacturing system to maximise user-selectable key performance indicators. In contrast to previous research, this framework incorporates artificial intelligence for decision-making and production line optimisation to provide a framework that can be used for a wide variety of manufacturing applications. The framework has been applied and validated in a real use case, with the automatic reconfiguration resulting in a process time improvement of approximately 10%

    A multi-objective flexible manufacturing system design optimization using a hybrid response surface methodology

    Get PDF
    The present study proposes a hybrid framework combining multiple methods to determine the optimal values of design variables in a flexible manufacturing system (FMS). The framework uses a multi-objective response surface methodology (RSM) to achieve optimum performance. The performance of an FMS is characterized using various weighted measures using the best-worst method (BWM). Subsequently, an RSM approximates the functional relationship between the FMS performance and design variables. The central composite design (CCD) is used for this aim, and a polynomial regression model is fitted among the factors. Eventually, a bi-objective model, including the fitted and cost functions, is formulated and solved. As a result, the optimal percentage for deploying the FMS equipment and machines to achieve optimal performance with the lowest deployment cost is determined. The proposed framework can serve as a guideline for manufacturing organizations to lead strategic decisions regarding the design problems of FMSs. It significantly increases productivity for the manufacturing system, reduces redundant labor and material handling costs, and facilitates productio

    Jornadas Nacionales de Investigación en Ciberseguridad: actas de las VIII Jornadas Nacionales de Investigación en ciberseguridad: Vigo, 21 a 23 de junio de 2023

    Get PDF
    Jornadas Nacionales de Investigación en Ciberseguridad (8ª. 2023. Vigo)atlanTTicAMTEGA: Axencia para a modernización tecnolóxica de GaliciaINCIBE: Instituto Nacional de Cibersegurida

    Producing Affection : Affect and Mediated Intimacy in Pokémon

    Get PDF
    Pokémon is a global multimedia franchise formed around a core series of videogames and a variety of characters to collect, learn about, and play with. Throughout its decades of development, Pokémon has grown into a media mix comprising of digital and analog games, animations, comics, toys, and a plethora of branded merchandize, all centering on the Pokémon characters and the audience’s relationship with them. In this thesis, I explore how affection is formed and distributed in Pokémon. I view the relationship with Pokémon characters as a form of mediated intimacy, theorizing it as feelings of affection and closeness expressed through and aimed at technology. Through this, I discuss how technological and fantastical bodies wield agency and actively participate in the formation of everyday affects. By drawing primarily on game studies and affect studies, I develop an interdisciplinary method for playing and reading media texts for their affects and use it to analyze the media mix of Pokémon and the affective relations therein. I focus primarily on the Pokémon videogames that serve as the core product of the entire media mix. I examine what it means to construct an entire media mix based on videogames and play and suggest this as a key interpretive arrangement for understanding the mediated intimacy of Pokémon. This study presents the mediated intimacy of Pokémon as the result of the ludic and technological foundations of the Pokémon media mix, at the heart of which is the role-playing form of the original videogames and the way they have positioned audiences as participants and characters in the world of Pokémon. In this playful environment that overlaps fiction and everyday reality, the media mix guides its players to conduct a form of affective labor to access and traverse the textual whole of Pokémon and furthermore aligns this effort with the diegetic theme of caretaking as captured on the transmedia bodies of Pokémon. Additionally, this work contributes to the theorization and rethinking of intimacies by exploring affection in human and non-human networks as an entanglement of biological and technological actors.Tuotettua kiintymystä. Pokémonin affekti ja medioitu intiimiys Pokémon on globaali monimediakokonaisuus. Sen keskiössä on joukko videopelejä sekä niiden hahmoja, joita kerätään, joista opitaan ja joiden kanssa leikitään. Pokémonista on vuosikymmenten mittaan kasvanut mediatuotteiden rypäs, media mix: monista tuote- ja julkaisukanavista koostuva kokonaisuus, joka sisältää digitaalisia ja analogisia pelejä, animaatioita, sarjakuvia, leluja ja brändituotteita, joissa kaikissa korostuvat Pokémon-hahmot sekä yleisön suhde niihin. Väitöskirjassani tarkastelen, miten kiintymystä rakennetaan ja levitetään Pokémonissa. Tutkin Pokémon-hahmoihin muodostettuja suhteita medioidun intiimiyden käsitteen kautta. Tutkimuksessani suhteet näyttäytyvät kiintymyksellisten tunteiden tiivistyminä sekä läheisyytenä, jota ilmaistaan teknologian avulla ja sitä kohtaan. Näin tarkastelen, miten teknologisten sekä fantastisten kehojen toimijuus näkyy arkipäiväisten affektien muodostumisessa. Ammentamalla pelitutkimuksesta ja affektitutkimuksesta kehitän monitieteisen metodin mediatekstien pelaamiseen ja lukemiseen, ja käytän sitä Pokémonin media mixin, sen affektien ja sen piirissä muodostettujen kiintymyssuhteiden analysointiin. Keskityn erityisesti Pokémon-videopeleihin, jotka toimivat koko media mixin ydintuotteena. Tutkin, miten Pokémonin media mix on rakennettu ensisijaisesti pelilliselle ja leikilliselle pohjalle, ja ehdotan tätä tulkintamallia keskeiseksi Pokémonin medioidun intiimiyden ymmärtämiselle. Tutkimuksen tuloksena esitän Pokémonin medioidun intiimiyden muodostuvan Pokémonin media mixin leikillisistä ja teknologisista juurista, joiden perustana on alkuperäisten Pokémon-videopelien roolipelillinen rakenne sekä se, miten sen avulla pelaajat on asemoitu hahmoiksi Pokémonin maailmaan. Fiktiota ja todellisuutta sekoittavassa leikillisessä ympäristössä Pokémonin media mix ohjaa pelaajia hoivan ja huolenpidon teemojen kautta tekemään tunnetyötä tuoteperheen mediatekstien parissa ja piirtää tämän työn tulokset Pokémon-hahmojen monimediakehoille. Lisäksi väitöstutkimukseni osallistuu intiimiyden laajempaan teoretisointiin ja uudelleenmäärittelyyn tarkastelemalla elollisten ja leikillisesti elävien toimijoiden suhteita biologisena ja teknologisena yhteenliittymän

    Research on the System Safety Management in Urban Railway

    Get PDF
    Nowadays, rail transport has become one of the most widely utilised forms of transport thanks to its high safety level, large capacity, and cost-effectiveness. With the railway network's continuous development, including urban rail transit, one of the major areas of increasing attention and demand is ensuring safety or risk management in operation long-term remains for the whole life cycle by scientific tools, management of railway operation (Martani 2017), specifically in developed and developing countries like Vietnam. The situation in Vietnam demonstrates that the national mainline railway network has been built and operated entirely in a single narrow gauge (1000mm) since the previous century, with very few updates of manual operating technology. This significantly highlights that up to now, the conventional technique for managing the safety operation in general, and collision in particular, of the current Vietnamese railway system, including its subsystems, is only accident statistics which is not a scientific-based tool as the others like risk identify and analyse methods, risk mitigation…, that are already available in many countries. Accident management of Vietnam Railways is limited and responsible for accident statistics analysis to avoid and minimise the harm caused by phenomena that occur only after an accident. Statistical analysis of train accident case studies in Vietnam railway demonstrates that, because hazards and failures that could result in serious system occurrences (accidents and incidents) have not been identified, recorded, and evaluated to conduct safety-driven risk analysis using a well-suited assessment methodology, risk prevention and control cannot be achieved. Not only is it hard to forecast and avoid events, but it may also raise the chance and amount of danger, as well as the severity of the later effects. As a result, Vietnam's railway system has a high number of accidents and failure rates. For example, Vietnam Rail-ways' mainline network accounted for approximately 200 railway accidents in 2018, a 3% increase over the previous year, including 163 collisions between trains and road vehicles/persons, resulting in more than 100 fatalities and more than 150 casualties; 16 accidents, including almost derailments, the signal passed at danger… without fatality or casual-ty, but significant damage to rolling stock and track infrastructure (VR 2021). Focusing and developing a new standardised framework for safety management and availability of railway operation in Vietnam is required in view of the rapid development of rail urban transport in the country in recent years (VmoT 2016; VmoT 2018). UMRT Line HN2A in southwest Hanoi is the country's first elevated light rail transit line, which was completed and officially put into revenue service in November 2021. This greatly highlights that up to the current date, the UMRT Line HN2A is the first and only railway line in Vietnam with operational safety assessment launched for the first time and long-term remains for the whole life cycle. The fact that the UMRT Hanoi has a large capacity, more complicated rolling stock and infrastructure equipment, as well as a modern communica-tion-based train control (CBTC) signalling system and automatic train driving without the need for operator intervention (Lindqvist 2006), are all advantages. Developing a compatible and integrated safety management system (SMS) for adaption to the safety operating requirements of this UMRT is an important major point of concern, and this should be proven. In actuality, the system acceptance and safety certification phase for Metro Line HN2A prolonged up to 2.5 years owing to the identification of difficulties with noncompliance to safety requirements resulting from inadequate SMS documents and risk assessment. These faults and hazards have developed during the manufacturing and execution of the project; it is impossible to go back in time to correct them, and it is also impossible to ignore the project without assuming responsibility for its management. At the time of completion, the HN2A metro line will have required an expenditure of up to $868 million, thus it is vital to create measures to prevent system failure and assure passenger safety. This dissertation has reviewed the methods to solve the aforementioned challenges and presented a solution blueprint to attain the European standard level of system safety in three-phase as in the following: • Phase 1: applicable for lines that are currently in operation, such as Metro Line HN2A. Focused on operational and maintenance procedures, as well as a training plan for railway personnel, in order to enhance human performance. Complete and update the risk assessment framework for Metro Line HN2A. The dissertation's findings are described in these applications. • Phase 2: applicable for lines that are currently in construction and manufacturing, such as Metro Line HN3, Line HN2, HCMC Line 1 and Line 2. Continue refining and enhancing engineering management methods introduced during Phase 1. On the basis of the risk assessment by manufacturers (Line HN3, HCMC Line 2 with European manufacturers) and the risk assessment framework described in Chapter 4, a risk management plan for each line will be developed. Building Accident database for risk assessment research and development. • Phase 3: applicable for lines that are currently in planning. Enhance safety requirements and life-cycle management. Building a proactive Safety Culture step by step for the railway industry. This material is implemented gradually throughout all three phases, beginning with the creation of the concept and concluding with an improvement in the attitude of railway personnel on the HN2A line. In addition to this overview, Chapters 4 through Chapter 9 of the dissertation include particular solutions for Risk assessment, Vehicle and Infrastructure Maintenance methods, Inci-dent Management procedures, and Safety Culture installation. This document focuses on constructing a system safety concept for railway personnel, providing stringent and scientific management practises to assure proper engineering conditions, to manage effectively the metro line system, and ensuring passenger safety in Hanoi's metro operatio

    Perspectives on adaptive dynamical systems

    Get PDF
    Adaptivity is a dynamical feature that is omnipresent in nature, socio-economics, and technology. For example, adaptive couplings appear in various real-world systems like the power grid, social, and neural networks, and they form the backbone of closed-loop control strategies and machine learning algorithms. In this article, we provide an interdisciplinary perspective on adaptive systems. We reflect on the notion and terminology of adaptivity in different disciplines and discuss which role adaptivity plays for various fields. We highlight common open challenges, and give perspectives on future research directions, looking to inspire interdisciplinary approaches.Comment: 46 pages, 9 figure
    corecore