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.
Results
Showing 1 to 20 of 85 for “"target location"”.
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Lifespan changes in covert attention alignment
… a stimulus cue (a dot that appears briefly at a target location) prior to the presentation of a target. Attention was automatically aligned to a possible target location in response to the stimulus cue. In the second, an arrow was presented prior to the target, allowing the subject to align …
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Human Movement Analysis: Ballistic Dynamics, and Edge Continuity for Pose Estimation
… to recognizing them is the variability of the target-location of the hand~- people can reach above their heads, for something on the floor, etc. Our approach recognizes them independent of the movement's target-location and direction by modelling the ballistic dynamics. A video sequence is …
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Prefrontal coding of naturalistic working memory: Mechanisms during normal maintenance and modelled disease
… virtual environment. During the task, a target was presented in 1 of 9 locations in a virtual arena. The target then disappeared and following a 2-second delay period, subjects navigated to the cued target location using a joystick. I recorded single neuron activity using two 96-channel …
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Frames of reference and electronic anchors: An investigation of map displays for helicopter flight
… wayfinding, and the orientation component of the target location score were generally facilitated by the fixed map, while reorienting from an unfamiliar location was facilitated by the rotating map. Color anchors facilitated wayfinding and target location, but degraded performance on distance …
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Empirically derived guidelines for touch screen targets
… field experiment determined the effect of target location and visual target size on user accuracy and empirically derived quantitative guidelines for determining touch target size based. on target location. The experiment was conducted in a grocery store using a piezo-electric monitor in a …
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Drivers' Ability to Localize Auditory and Haptic Alarms in Terms of Speed and Accuracy
… experiment consisted of subjects identifying the target location of an alarm while driving a 2001 Buick LeSabre at 55 mph in light traffic. Four alarm modes were tested: 1) an auditory broadband alarm, 2) a haptic seat, 3) a combination of the haptic and the auditory alarm modes, and 4) a …
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Trajectory optimization for target localization using small unmanned aerial vehicles
… mission of interest involves computing location estimates for targets detected by onboard sensors. Combining UAV state estimates with information gathered by the imaging sensors leads to bearing measurements of the target that can be used to determine the target's location. This 3-D …
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Role of the Parabigeminal Nucleus in Predictive Tracking of Moving Targets
… the SC and PBN. SC cells respond to the virtual targets, but much less vigorously that PBN cells. However, the retinotopic representation of target location appears fairly good. SC cells reset their activity during saccades to virtual targets, but only for contraversive saccades, whereas the PBN …
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Attentional Uncertainty in the Stroop Priming Task
… the anterior attentional system by pre-cuing the location of the target stimulus would eliminate age differences in interference. Older adults continued to be susceptible to interference when the location cue was ambiguous or invalid, but were less susceptible when the target location of a …
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An Analysis of Motivational Cues in Virtual Environments.
… are used to motivate users towards a specific target location. The results of this study indicate some significant differences in how users responded to the various cues.
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Constraints and invariance in target detection
… hypothesis testing is discussed for purposes of target detection. Invariant tests are proposed and analysed in two contexts. The first involves the use of cyclic permutation invariance as a solution to detecting targets with unknown location in noise. An invariance condition is used to eliminate …
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What spatial reference frame is used for priming in visual search?
… itself in speeded detection times for a target when that target appears in the same location that it previously appeared in (Shore & Klein, 2001). Target locations can be defined in either egocentric (i.e. relative to the body or a specific part of the body) or allocentric (i.e. relative …
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Application of the ISO 9283 standard to test repeatability of the Baxter robot
… varies movement speed, payload weight, and target location while measuring repeatability. The average positional repeatability was determined to be 2.9 mm and 3.3 mm for the left and right arms respectively. The average orientation repeatability was determined to be 0.003 to 0.0047 radians …
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Target localization in MIMO radar systems
… joint processing of the received echoes from the target. MIMO radar has been receiving increasing attention in recent years from researchers, practitioners, and funding agencies. Elements of MIMO radar have the ability to transmit diverse waveforms ranging from independent to fully correlated. …
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Selective attentional delays and attentional capture among multiple visual onset elements
… is presented alone. This occurs even though the location of the relevant stimulus (target) is known or visually indicated with stimuli onset. Results showed noise elements delay both focal attending and automatic processing of a target. Furthermore, visually indicating the target location before …
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Factors affecting target perceptibility in object substitution masking
… that reporting of a briefly presented target item is considerably reduced when a mask remains visible after the target offset. The size of OSM has been said to be critically dependent on the speed with which attention is deployed towards the target. One line of evidence in favour of …
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Movement Characteristics of Visual Selective Attention
… processing efficiency. Two experiments utilizing target location precueing and a response competition paradigm varied the distance of attention movement, the presence of information in the path of the movement, and the distance of the information to the target. Results were consistent with the …
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Optimal linear array heading in a directional noise field
… ambient noise detected by the array. For a given target location, each possible heading of the array centers the ambiguous beam of the array at a different true bearing. Therefore, each heading of the array will receive a different ambient noise level. An optimal heading can be obtained which …
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Fuzzy Optimal Swarm of Autonomous Aircrafts for Target Determination and Convergence Control System
… used in planet exploration, and to be used in target location determination and convergence, an algorithm of this type could be used in an Autonomous Stratospheric Aircraft (ASA), thus having the possibility of being used for the exploration of a planet as well as many other applications. Upon …
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Studies of sequence recognition by the EcoRI restriction/modification system of Escherichia coli
… study as a model of the general phenomenon of target location by nucleotide sequence-specific enzymes and binding proteins. Models have proposed a variety of means for site location, including formation of hydrogen bond matrices between protein and DNA and ionic contacts between the …
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