This paper describes a framework for assessing the system safety impacts of an Adaptive or Intelligent Cruise Control (ICC) system. This framework incorporates a time-to-collision model that is developed from vehicle headway, speed, and acceleration data that are typically gathered as part of field operational tests. Specifically, the framework combines car-following models with vehicle deceler...

In recent years, complementarity techniques have been developed for modeling non-smooth dynamics arising from contact and collision problems for multi-link robotic systems. The commonly used complementarity approach sets up a linear complementarity problem (LCP) using non-minimal coordinates together with all the unilateral contact constraints and inter-link hinge and loop closure bilateral con...

Voyage optimization is a technology to predict the ship performance in various sea states and current conditions, and based on the performance of the ship to assist ship masters in route selection. The targets of increasing energy efficiency and reducing Green House Gas (GHG) emission in the shipping industry can be achieved by voyage optimization. However, the practical and accurate prediction...

The changing prices of bunker fuel open the door for substantial cost savings by adjusting the sailing speed of ships. A large ship may be burning up to 100 000 USD of bunker fuel per day, which may constitute more than 75% of its operating costs. Reducing the cruising speed by 20% reduces daily bunker consumption by 50%. However, in order to maintain liner service frequency and capacity, reduc...

Propeller blade design for fast ships is often driven by cavitation constraints. A tradeoff exists, where larger chord lengths and section thicknesses typically improve cavitation performance but result in lower efficiency. Typically, chord lengths are optimized for the design condition (ship endurance speed), with some specified margin to prevent cavitation off-design (at maximum ship speed). ...

Operations Research (OR), also called Operational Research in the United Kingdom (UK), uses various computational tools for solutions to complex problems within a system. It deals with challenges in planning, scheduling, forecasting, process analysis and decision analysis. It also addresses individual components of the system. The methodology used for decisions based upon stochastic (random) pr...

Industry is continuously researching techniques to reduce power requirements, while increasing speed, to meet the demands of today’s low (battery) powered wireless systems. The operational transconductance amplifier (OTA) is a fundamental building block in analog (mixedsignal) design and its performance characteristics are the foundation of system level characteristics. Improving the performanc...

Positioning systems include different control functions for automatic positioning and guidance of marine vessels by means of proper action of the thruster and propeller devices. These may be controllable pitch propeller (CPP) with fixed speed, controllable speed with fixed pitch propeller (FPP), or controllable pitch and speed in combination. The positioning controller computes commanded forces...

This study investigates the speed-power relationship of ships, and is based on a combined econometric naval architectural data-driven model fed with operational data from more than 50,000 noon reports obtained 88 tankers. It shown that exponent significantly lower 3 at speed intervals below design speed. finding, including itself, affects environmental discussions related to slow steaming, sinc...

An operational amplifier designcd with O.35um CMOS teehnology is prcsented. All the transistors are realized with minimum or near-minimum ehannel length. As thc short ehannel length causcs performance degradation, a proper operational amplifier structure is sclected to compensate the performance degradation. The op amp is designed to meet the requirement of high-speed high-resolution sigma delt...