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 27 for “"USVs"”.
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Coordinated guidance strategy for multiple USVs during maritime interdiction operations
… In particular, unmanned surface vehicles (USVs) seem to be a good solution contributing to successful maritime interdiction missions. The strategy would be to surround the target to restrict its further maneuver. In this case, a coordinated control of the intercept time and terminal angle …
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Behavioural, Pharmacological, and Immunohistochemical Investigation of 50 kHz USVs as an Expression of Positive Emotional Arousal in the Long Evans Rat
The emission of ultrasonic vocalizations (USVs) in Rattus norvegicus is thought to effectively represent an underlying emotional state within the organism manifested at the behavioural level. The main goal of my thesis was to characterize, at multiple levels of analysis, the 50 kHz USVs of the …
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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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Interactions between the cholinergic and dopaminergic system during the production of ultrasonic vocalizations in rats
… group contains 22-kHz ultrasonic vocalization (USVs), characterized by relatively constant (flat) frequency with peak frequency ranging from 19 to 28-kHz, and a call duration ranging between 100 – 3000 ms. These vocalization can be induced by cholinomimetic agents injected into the ascending …
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Encoding of Ultrasonic Communication Signals in Rat Auditory Cortex
… via a set of ultra-sonic vocalizations (USVs) in the 50kHz frequency range. These USVs have a conveniently simple structure, making them easy to synthesize and modify. The rat thus provides an excellent model system with which to probe the processing and encoding of such communication …
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The Physics of Rodent Ultrasonic Vocalizations
… done on the physics of ultrasonic vocalizations (USVs). There are two orders of mammals known to make these kind of vocalizations: cetaceans and rodents. Of these two the mechanism behind the rodent calls are better understood. Thus, this thesis investigates the physics of rodent USVs with the …
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Developmental expectations for child-like sentences
… sentences to unique subject-verb combinations (USVs). Mean length of utterance in morphemes (MLU; Brown, 1973) and Index of Productive Syntax (IPSyn; Scarborough, 1990) scores were calculated using 100 complete and intelligible utterances to determine the relationship between sentence diversity …
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Aportación a los sistemas de evitación de obstáculos para vehículos marinos de superficie no tripulados
… de evitación de obstáculos estáticos aplicados a USVs. En primer lugar, se propone un nuevo entorno de simulación para USVs, el cual está basado en el modelado simplificado de un sensor LIDAR. Gracias a este modelado del sensor, se consigue un entorno de simulación realista que, debido a su bajo …
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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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Establishing a Rodent Model of Postoperative Pain: Investigating Potential Sex Differences and Changes in Gene Expression
… received handling or tickling prior to testing. USVs were recorded, and tickled rats emitted USVs signalling positive affect. Rats underwent plantar incision or sham surgeries, and PWTs were measured using Von Frey filaments before and for eight days after surgery. Both sexes developed robust …
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50-kHz ultrasonic vocalizations in hemiparkinsonian rats repeatedly treated with dopaminomimetic drugs as a possible behavioral marker of the affective properties of dopamine-replacing therapy in Parkinson's disease
… the emission of 50-kHz ultrasonic vocalizations (USVs), a behavioral marker of positive affect, in rats bearing a unilateral lesion with 6-hydroxydopamine (6-OHDA) in the medial forebrain bundle. Apomorphine (2 or 4 mg/kg, i.p.), L-3,4-dihydroxyphenilalanine (L-DOPA, 6 or 12 mg/kg, i.p.), or …
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Influence of Mouse Motor Cortex on Vocal Musculature
… Although mouse ultrasonic vocalizations (USVs) have received a great deal of attention and interest, the role these cortical circuits and the mechanisms by which they might affect USVs have been little explored. Here, we investigate the role of the motor cortex of mice in controlling vocal …
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Large-scale dynamic observation planning for unmanned surface vessels
… 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 manned systems. In this thesis, we explore how to plan multiple USV observation …
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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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An integrative analysis of the multi- and transgenerational effects of endocrine-disrupting chemicals on behavior and neurobiology
… acoustic properties of ultrasonic vocalizations (USVs) and male sexual behavior. To determine if EDCs affected the underlying neuromolecular phenotype of these F2 males, we assessed the expression of candidate genes in the medial preoptic area (POA) and ventromedial nucleus (VMN) of the …
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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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A practical search with Voronoi distributed autonomous marine swarms
… algorithms are employed on Clearpath Heron USVs to validate the autonomy algorithms.
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A Study in Object Detection and Classification Performance by Sensing Modality for Autonomous Surface Vessels
… to run in real time on uncrewed surface vessels (USVs). The evaluation methodology encompasses multi-sensor calibration, real-time performance analysis, and the introduction of a late-fusion strategy in the image frame to reduce bounding-box uncertainty. Performance metrics include training …
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A Practical Search with Voronoi Distributed Autonomous Marine Swarms
… algorithms are employed on Clearpath Heron USVs to validate the autonomy algorithms.
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A RAPID PROTOTYPING FRAMEWORK FOR VISION-BASED LOCALIZATION ALGORITHMS
… vehicles (UAVs) and unmanned surface vessels (USVs) traditionally rely on the Global Positioning System (GPS). As adversarial electronic warfare capabilities grow, GPS signals face ever-increasing risks of jamming and spoofing, especially in contested environments. Therefore, as these …
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