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Showing 1 to 20 of 34 for “"USV"”.
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Design, Development, and Testing of an Unmanned Surface Vessel (USV) for Oyster Aquaculture
To sustainably feed the growing worldwide population, development of aquaculture technology is necessary. However, it heavily lags behind that for terrestrial agriculture. The Oystermaran team at MIT Sea Grant is working on developing a vehicle to address a section of this need. Close quarters …
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Term structure models with unspanned factors and unspanned stochastic volatility
… rates exhibit unspanned stochastic volatility (USV). A model has this property if it involves a source of stochastic variation — called an unspanned factor — that does not affect the model’s interest rates directly, but does affect the extent to which future interests are liable to change (that …
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Monitoring the Transport of Microorganisms in Aquatic Environments Using Unmanned Surface Vehicles
… such as sensors and unmanned surface vehicles (USV) need to be developed and used to address this knowledge gap. The goal of the research is to study population densities of the bacteria Pseudomonas syringae below, at and above the AWI using USV equipped with specialized sensors. The first …
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INTRACRANIAL INFUSIONS OF NEUROTENSIN AGONISTS PRODUCE AN ANXIOLYTIC PROFILE IN A RAT ULTRASONIC VOCALIZATION MODEL
… of fear-induced 22-kHz ultrasonic vocalizations (USVs) produced by male Wistar rats. A reduction in the number of 22-kHz USV calls is indicative of an anxiolytic effect. The current study used a USV model to evaluate the effects of PD149163 (0.1, 1.0, and 10.0 ng) and endogenous NT (0.1, 1.0, and …
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Remote depth survey of the Charles River Basin
… A remote-controlled unmanned surface vehicle (USV) was outfitted with a depth transducer for the purpose of conducting a depth survey of the Charles River Basin. Two windsurfer fins were added to the stem of the USV kayak for directional stability without significant drag, permitting a maximum …
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Pricing with Bivariate Unspanned Stochastic Volatility Models
Unspanned stochastic volatility (USV) models have gained popularity in the literature. USV models contain at least one source of volatility-related risk that cannot be hedged with bonds, referred to as the unspanned volatility factor(s). Bivariate USV models are the simplest case, comprising of one …
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Large-scale dynamic observation planning for unmanned surface vessels
… Navy's Spartan Scout unmanned surface vessel (USV) and NASA's Ocean-Atmosphere Sensor Integration System (OASIS) USV. These USVs are well-suited to complete monotonous, dangerous, and time-consuming missions. The USVs provide better performance, lower cost, and reduced risk to human life than …
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Software architecture for anti-submarine warfare unmanned surface vehicles
… exploring the use of unmanned surface vehicles (USVs). Currently, the process of finding submarines tends to be tedious and manpower intensive due to the high volume of acoustic data with limited means to filter for valuable information. Therefore, innovative software frameworks are required to …
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Autonomous Landing of an Unmanned Aerial Vehicle on an Unmanned Surface Vessel using Model Predictive Control with an Adaptive-Covariance Extended Kalman Filter
… land autonomously on an Unmanned Surface Vessel (USV) subjected to wave-induced motion. An innovative Adaptive-Covariance Extended Kalman Filter (AEKF) implementation was developed for the estimation of the 6 degree-of-freedom USV states using GPS and vision-based measurements of AprilTag markers …
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Precision stationkeeping with azimuthing thrusters
… positioning of an unmanned surface vehicle (USV) in a nautical environment is a difficult task. With a dual azimuthing thruster scheme, the optimization of thruster outputs uses an online method to minimize the amount of error. It simplifies necessary calculations by the assumption that the …
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Perception and Motion Planning for Autonomous Surface Vehicles in Aquaculture
The "Oystermaran" USV was designed and developed by students at MIT SeaGrant to resolve the oyster basket flipping bottleneck that slows down oyster farming at Ward Aquafarms. The state of the USV requires remote operation within close distance of the vessel. In this thesis, we present an automated …
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Autonomous data collection techniques for approximating marine vehicle kinematics
… trajectories for unmanned surface vehicles (USVs). A linear black box model of the USV yaw system is also developed, using only data available in the backseat. A prediction table for the M200 USV is developed with both techniques.
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Mechanical Design of a Sonar Mount for an Unmanned Surface Vehicle
Trends in USV research will continue on the path toward a fully autonomous USV capable of troop transport or enemy engagement. Imaging sonar will be an integral part of this development. However, due in part to sonar's inherent physical limitations, as well as its sensitivity to environmental …
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A systems engineering analysis of unmanned maritime systems for U.S. Coast Guard missions
… Tactical UUV, (2) Shore-Based Harbor/Coastal UUV/USV, and (3) Operational Offshore USV. These alternatives and their respective system architectures provide a design concept for near- to mid-term (5-10 year) acquisition. Finally, feasibility analysis reviews key system enablers (such as …
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ONTOGENY AND NEURAL MECHANISMS OF VOCAL COMMUNICATION IN MUS MUSCULUS
… mouse ultrasonic vocalizations (i.e., USVs) exhibit a pronounced developmental transition. Infant mice produce USVs in response to cold and isolation from the nest (i.e., isolation USVs). As pups become less dependent on caregivers for survival during early development, their rates of …
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UXS AUTHENTICATION AND KEY EXCHANGE REQUIREMENTS FOR MULTIDOMAIN OPERATION AND JOINT INTEROPERABILITY
… Pacific CASSMIR unmanned surface vehicle (USV). The implementation provides a concept of operation to demonstrate the use of MLS to provide secure and efficient C2 and exchange of data between the UAV and USV in a multi-domain ad-hoc network configuration. The experiments conducted are in a …
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Simulation and Testing of Wave-Adaptive Modular Vessels
… future models. A 12-ft unmanned surface vessel (USV) was instrumented and sea trials were conducted in the San Francisco Bay. A dynamic 4-post simulation was created for the USV using displacement inputs calculated from acceleration data via a custom integration scheme. The data was used to …
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An Application of Graph of Convex Sets Trajectory Optimization to the Marine Robotics Domain
Autonomous unmanned surface vehicles (USVs) and unmanned underwater vehicles (UUVs) are becoming ubiquitous in applications exploring marine environments, and the design of path planning algorithms for these vehicles remains an open area of research. For marine environments, to save on energy a …
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Multi-body Dynamics Simulation and Analysis of Wave-adaptive Modular Vessels
… the response of a 12-ft unmanned surface vessel (USV) prototype of the WAM-V™ configuration. Testing data is collected, processed, and applied to the model for validation of its prediction accuracy. The results of the sea tests indicate that the simulation model performs well in predicting USV …
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Phenotypic And Electrophysiologic Characterization of a Mouse Model of Fragile X Syndrome
… measurements of ultrasonic vocalizations (USV), and 3D tracking of whisker movements to test Fmr1 KO mice for behavioral deficits compared to their Wild type (WT) littermates. Electrophysiological techniques were employed to evaluate the functional properties of the neocortex. Pyramidal …
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