Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"decentralized systems"”.
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Secure Computation in Decentralized Systems
Decentralized systems like Bitcoin and Ethereum are real-world examples of secure distributed systems deployed at scale. Over the past decade, these systems and others have proven to provide a trust-minimized solution for computing. They ensure the correct execution of code (correctness), maintain …
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Reliable control of decentralized systems: An ARE-based H(infinity) approach
This thesis presents a new method of decentralized linear, time-invariant control system synthesis based on the algebraic Riccati equation (ARE). The basic decentralized design guarantees closed-loop stability and a predetermined level of worst-case disturbance attenuation. Certain modifications of …
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AI-Driven Financial Market Surveillance: Detecting and Preventing Misconduct in Decentralized Systems
L'abstract è presente nell'allegato / the abstract is in the attachment
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Constructed wetlands as reliable decentralized systems for wastewater treatment and reuse in the Mediterranean area: main issues and concerns
Al giorno d'oggi sono molte le problematiche connesse al tema della carenza idrica. Queste principalmente riguardano una distribuzione disomogenea e inefficace delle risorse idriche. Il trattamento e il recupero delle acque reflue tramite sistemi decentralizzati può considerarsi, a tal proposito, …
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Making decentralization work : building local institutions in Cambodia
… selected sector along with the introduction of decentralized systems and mechanisms and the provision of capacity building at provincial and local levels. The findings of this study suggest that the Seila program has been able to establish decentralized systems and mechanisms to deliver local …
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An Emergent Architecture for Scaling Decentralized Communication Systems (DCS)
… and industrial community's design reach - a decentralized system design, which is not solely driven by static physical models and sound engineering principals, but more dynamically, perhaps sub-optimally at initial deployment and socially-influenced in its evolution. To complement today's …
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Reinforcement learning approach for optimizing load shedding and controller parameter tuning in active islanded power systems
… resilient design an important feature for power systems. Incorporating the capability of parts of the power system to operate as active decentralized systems is one way of increasing the resiliency and enhancing the system reliability. This thesis addresses two significant issues related to …
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Reliable Decentralized Controller Design for Discrete/continuous-Time, Sampled-Data, and Multirate Systems
… of sensors or actuators for both centralized and decentralized systems. The designs guarantee stability and an $H\sb\infty$-norm bound on the closed-loop system despite failures in any subset of that preselected set of sensors or actuators. The discrete-time divided-difference operator formulation …
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ThermoEquil: a secure protocol for committee-based permissionless blockchains
… blockchains by combining proofof work with other decentralized systems. The committee-based protocol is proposed to split the overheadsof processing transactions among multiple, smaller groups of nodes to work in parallel to maximizeperformance. However, most existing solutions compromise security …
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Efficiency loss in market mechanisms for resource allocation
… computer science, and economics: in large scale, decentralized systems, how can we efficiently allocate scarce resources among competing interests? On one hand, constraints are imposed on the system designer by the inherent architecture of any large scale system. These constraints are …
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Unlocking Collective Intelligence in Decentralized AI
… the development of efficient methods for decentralized learning while preserving privacy to generate wisdom whose quality is on par with the case of data centralization. It involves first identifying and creating essential building blocks that encourage collaboration while preserving the …
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Cloud-Based Model Predictive Control: Establishing a Fully Distributed Architecture for Nonlinear MPC
… performance in nonlinear, distributed or decentralized systems remains an obstacle to existing distributed MPC formulations. In this thesis a discrete-time cloud-based model predictive control architecture for application to unstable nonlinear systems under process constraints is developed …
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Decentralized sliding mode control and estimation for large-scale systems
… robust control and estimation for large scale systems (LSSs) using robust sliding mode control (SMC) and sliding mode observers (SMO) theory based on a linear matrix inequality (LMI) approach. A complete theory of decentralized first order sliding mode theory is developed. The main developments …
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Information Quality Criteria Analysis in Query Reformulation in Dynamic Distributed Environments
Dynamic distributed environments are decentralized systems that provide users with querying capabilities over a set of heterogeneous, distributed and autonomous data sources (peers). Data Integration Systems, Peer Data Management Systems (PDMS) and Dataspaces are examples of such systems. They are …
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Assessing benefits and consequences of water conservation and fit for purpose water systems
… task to enhance conventional water management systems by implementing Integrated Urban Water Management and hybrid centralized-decentralized systems. To enable informed decisions on water demand management strategies based on water demand reduction, cost, energy savings, etc., understanding …
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Design and applications of a secure and decentralized Distributed Hash Table
… a powerful building block for highly scalable decentralized systems. They route requests over a structured overlay network to the node responsible for a given key. DHTs are subject to the well-known Sybil attack, in which an adversary creates many false identities in order to increase its …
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Environmental Tracking and Formation Control for an Autonomous Underwater Vehicle Platoon with Limited Communication
… a desired spatial formation about the average. A decentralized consensus-based algorithm is developed for controlling the platoon. In a novel two-level consensus approach, each vehicle estimates a virtual leader trajectory using local and shared measurements at one level, then positions itself …
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Development of a High Sensitivity, Multiplex Vertical Flow Immunoassay System for the Detection of Biothreat Agents
… times, has motivated a shift toward developing decentralized systems that enable early detection and expedite appropriate countermeasures. However, a critical gap exists between field-deployable systems that are cost-effective and those that offer highly sensitive, multiplex capabilities for …
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