Author Archives: Lokukaluge Prasad Perera

Digital Twin & Blockchains?

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This presentation will focus on the topic of Digital Twin & Blockchain technologies. That consist of some fundamental concepts that are shared between these two digital networks. A comparison between the digital twin and blockchain digital networks is also elaborated in this presentation. The subtopics of this presentation consist of Evolution of Digital Networks, What is a Digital Network, Evolution of Digital Twin, What is a Blockchain, The Birth of a Blockchain, The Main Chain, Digital Twin & Blockchain, The Orphan Blocks, and Common Features of such digital networks.

Digital Twin as System of Systems?

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This presentation will focus on the topic of Digital Twin as a System of Systems. That consists of an overview of developing the digital twin as a system of systems (SoS) for complex systems by utilizing extreme data. The development a digital twin for an ocean going vessel, as a vessel hull and ship systems to improve ship energy efficiency has also been discussed in this presentation. The subtopics of this presentation consist of SoS from Extreme Data, Marine Engine Data Clusters, Marine Engine Data Super Clusters, SoS Data Space, Extreme Data, Ship Energy Efficiency, Engine Super Cluster, Other Super Clusters, and Operation Modes.

Covariance & Correlation in Digital Twin (Part II)? 

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This presentation will focus on the topic of Covariance & Correlation in Digital Twin. The subtopics of this presentation consist of One Parameter Data Cluster, Histogram of the Parameter, Histogram under a Probability Distribution, What is a Gaussian Distribution, Gaussian Distribution as a Probability Density, Kernel Density Estimation of a Data Cluster, Histogram vs Kernel Density Estimation, Two Parameter Data Cluster, Zero Mean Value, Kernel Density Estimation of a Data Cluster, Mean, Covariance & Correlation Matrices, Covariance & Correlation, and Python Codes.

Covariance & Correlation in Digital Twin (Part 1) ?

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This presentation will focus on the topic of Covariance & Correlation in Digital Twin. The subtopics of this presentation consist of Statistical Properties in Digital Twin, What is Mean, Variance, Standard Deviation, Covariance and Correlation.

 What is Industry 4.0?

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This presentation will focus on the topic of What is Industry 4.0?. . The subtopics of this presentation consist of What is an Industrial Revolution, The First Industrial Revolution, The Second Industrial Revolution, The Third Industrial Revolution?, The Fourth Industrial Revolution (Industry 4.0), Additional Topics in Industrial 4.0 and The Fifth Industrial Revolution.

What is the Fuel Life Cycle in Shipping?

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This presentation will focus on the topic of the Fuel Life Cycle in Shipping, including its cost calculations with respect to emissions, mechanical and electrical energy losses, and operation and maintenance costs. The subtopics of this presentation consist of Why this is important in Shipping, What is the Fuel Life Cycle, Important Calculations in the Fuel Life Cycle, Crude Oil & Gas extraction, Crude Oil & Gas delivery, Crude Oil & Gas refinery, Crude Oil & Gas delivery, Well to Tank (Upstream), Marine Power Plant, Ship Propeller & Speeds, Fouling & Cavitation, Ship Resistance, Wind, Wave & Currents, Operation & Maintenance, Tank to Propeller (Downstream), and The Fuel Life Cycle.

References:

> K.Q. Bui, L.P. Perera and J. Emblemsvag ”Life-cycle cost analysis of an innovative marine dual-fuel engine under uncertainties,” Journal of Cleaner Production, vol. 380, part. 2, 2022, 134847.

What is Ship Pivot Point (Part I) ?

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This presentation will focus on the topic of What is Ship Pivot Point?. The subtopics of this presentation consist of Why this is important in Ship Navigation, What is Ship Pivot Point, Point Mass in Planer Motions, Translational Motions, Rotational Motions, Translational & Rotational Motions, Point Mass in Circular Motions, The Centripetal Force, The Normal Acceleration, The Tangential Acceleration, The Rotational Acceleration, The Chain Rule, Resulted Normal Acceleration, and Resulted Centripetal Force.

Why Autonomous Navigation is a Success?

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This presentation will focus on the topic of Why Autonomous Navigation is a Success?. That will discuss the success of autonomous navigation in land-based vehicles and the challenges that will be encountered by autonomous ships in relation to environmental and technological considerations. The subtopics of this presentation consist of Autonomous Ship Navigation, Birth of Autonomous Navigation, Why Autonomous Navigation is a Success, Structured & Steady Environmental Conditions, Real-World Cleaner Navigation Data Sets, Understanding & Simplicity in Human-Technology Interactions, Adequate & Faster Safety Measures, and Wrong Maneuvers in Autonomous Shipping.

What is Autonomous (In Navigation) ?

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This presentation will focus on the topic of What is Autonomous (In Navigation) ?. The subtopics of this presentation consist of Birth of Autonomy In Navigation, Autopilot Navigation, Autopilot in Shipping, Heading Control, Course Control, Speed Control, Path Following, Way-Point Navigation, Dynamic Positioning, What is Autonomous (in Navigation), Intelligent Agent Requirements, What is Autonomy, What is Social-ability, What is Tec-Interaction, What is Reactivity, and What is Pro-activeness.

Ship Underactuation ? (Part II)

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This presentation will focus on the topic of Ship Underactuation in ocean-going vessels. The subtopics of this presentation consist of Propeller-Rudder-Bow Thruster Powered Vessel, Ship Navigation Calm Waters, Surge Acceleration & Velocity, Ship Resistance in the Surge Direction, Constant Surge Velocity, Ship Resistance on the Surge Velocity, Slightly Higher Propeller Thrust, Incoming Waves & Wave Resistance Force, Decomposition of Wave Resistance Force, Summation in Surge Direction Ship Resistance, Sway Acceleration, Birth of Sway Velocity, Ship Resistance in the Sway Direction, Summation of Sway Direction Ship Resistance, Course-Speed Vector, Yaw Moment, Yaw (Angular) Acceleration, Yaw Rate (Angular Velocity), Vessel Controllability, Rudder-Propeller Actuation, Bow thruster Actuation, Net Force in the in the Surge Direction, Net Force in the Sway Direction, Constant Course-Speed Vector, Net Moment in the in the Yaw Direction, Resulted Ship Motion, Realistic Ship Motions, Fully Actuation in Slow Maneuvers & Clam Weather, Ship Navigation in Moderate Speed & Weather, Adequate Yaw Moment, Inadequate Sway Force, Ship Underactuation.