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 50 for “"Task completion time"”.
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Factors Influencing The Accuracy Of Task Completion Time Estimates
… found that people tend to underestimate their task completion times (e.g., Buehler et al., 1994), factors that might influence the accuracy of temporal predictions have received little empirical treatment. The research presented in this thesis identified two distinct factors that mediated time …
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The effects of recognition accuracy and vocabulary size of a speech recognition system on task performance and user acceptance
… size of the recognizer as a percent of task vocabulary size to determine their effects on system performance. In addition, the study considered one characteristic of the user, age. Briefly, subjects performed a data entry task under each of the treatment conditions. Task completion time …
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An Investigation into the Effects of Chemical Protective Clothing on Team Process Performance
… to help can often cause heat stress, reduced task efficiency, and reduced range-of-motion for the worker. Teams as well as individuals suffer from these effects resulting in difficulty communicating, increased task completion time, and reduced productivity. Studies investigating the effects of …
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Quantifying coordination of human gait : fall risk and effects of aging
… defined as a decrease in the ability to properly time the motion of body segments with one another, is thought to be one factor contributing to the high rate of falls in older populations. Thus, coordination is often used by clinicians as a measure to help identify a patient's risk of falling, as …
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Effects of Handedness on Completion Time during Performance of Multiple Tasks Using “Proper” and “Improper” Tools
… critical factor involving single or multiple tasks that are designed for a specific hand. The purpose of this research was to investigate the effect of proper tool design. This research identified the dominant hand and measured task completion time between each of two tasks, 1) the use of left …
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Context awareness for wearable computers
… useful to enhance user proficiency in everyday tasks. A wearable, context–aware computer system and a set of evaluation tasks are devised to investigate this premise. A photograph diary study is carried out to elicit defining features of a broad range of everyday activities. These features are …
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Strategies for Using Instructions in Procedural Tasks
… (studying the instructions before attempting the task) or a task-based strategy (attempting the task and referencing instructions) was more effective for procedural performance and learning. Four groups of participants learned to perform macram tasks and assembly tasks, and received detailed …
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Differences in performance and preference for object-oriented vs. bit-mapped graphics interfaces
… subjects performed objectively derived benchmark tasks appropriate for two-dimensional graphics packages. Both performance and preference data were collected. Task completion time, aborted attempts, learning effects, and errors constituted the performance measures. For the preference data, …
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HUMAN FACTORS EVALUATION OF OPERATOR INTERFACES FOR TELEOPERATION OF A DEXTEROUS MANIPULATOR
… satellite servicing spacecraft is a challenging task for a human operator, especially when there is significant communications delay between the control station and spacecraft. On-orbit operations are further complicated by a communications time delay between the ground and spacecraft. Operator …
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A real-time distributed resource-granting task scheduler for a virtual infrastructure management system
This M.Eng. thesis introduces a distributed real-time task scheduler that is designed and implemented to replace the role of a lock server for a cloud service that manages data centers that contain virtual machines. A round-robin scheduling algorithm is proposed that orders tasks based on their …
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An experimental investigation of sensory feedback methods within teleoperation robotic systems
… multiple feedback methods in relation to overall completion time, error rate, perceived workload (using NASA-TLX) and frustration. A 24 participant study is presented, with results demonstrating no significant findings in relation to the reduction of task completion time and error rate with the …
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Usability evaluation of a fault tree software user documentation
… objective measures included number of errors, task completion time, document reading time, and number of personal helps requested. In addition, subjective ratings on ease of use, accuracy of information, inconsistencies, ease of learning, completeness, helpfulness of figures, and ease of …
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Clustered Layout Word Cloud for User Generated Online Reviews
… of reviews make the review reading process time consuming. A text visualization can speed up the review reading process. In this thesis, we present the clustered layout word cloud -- a text visualization that quickens decision making based on user generated reviews. We used a natural …
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A structured demographic evaluation approach for interactive technologies based on the identification of high impact usability factors
… was to explore the impact of Font personality on task completion time. In order to test the proposed hypotheses, three empirical studies were conducted. Initially, a working e-commerce website prototype was designed to identify the implications of selected design attributes on loyalty via …
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ACT-R Based Models For Learning Interactive Layouts
… phone keypad. It predicts the non-movement time to copy a pre-cued letter. It explains the visual exploration strategy that a user may employ in the novice to expert continuum. The second model is a closed-form model that accounts for the combined effect of practice, decay, proactive …
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Anticipatory communication strategies for human robot team coordination
… especially where complex and safety-critical tasks must be performed. We envision a world where autonomous systems can be seamlessly integrated into high performing human teams. In order for team members to successfully work in concert to achieve a goal, the team must establish a common …
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AI in the Cath Lab: Implications of Clinical AI-Enabled Assistance for Intravascular Ultrasound Procedures
… systems in healthcare often focus on assisting tasks related to various modalities of medical imaging. Given the emphasis of the supportive nature of these tools, physicians maintain responsibility for the ultimate decisions. This thesis investigates the impact of an AI-enabled tool on clinical …
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Modelling stress levels based on physiological responses to web contents
… is studied via tangible measures such as task completion time, surveys and comprehensive tests from which data attributes are generated. Prediction of users' stress level and behaviour in some of these cases depends mostly on task completion time and number of clicks per given time …
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A comparison of human performance on computer text editing tasks using windowed and non-windowed strategies
… windows will improve productivity by decreasing task completion time. However, two studies (Silver, 1985 and Davies, Bury and Darnell, 1985) have found this not to be the case. In fact, one of the studies (Davies at al., 1985) found that task completion time was increased when using windows. It …
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The Effect of Shift Turnover Strategy and Time Pressure on Aviation Maintenance Technician Performance
… in aircraft. In commercial aviation, maintenance tasks are performed across multiple shifts. When AMTs share a maintenance task between shifts, the shift turnover strategy used may determine if information is effectively transferred between AMTs. Ineffective shift turnover strategies are a …
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