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Physical Sciences and Mathematics Commons™
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- Caching (1)
- Computer science education (1)
- Control loss (1)
- Control mode (1)
- Decision rights (1)
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- File Systems (1)
- Global illumination (1)
- Haptics (1)
- High Performance Computing (1)
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- Human-computer interaction (1)
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- Information system (1)
- Lattice-Boltzmann (1)
- Mental models (1)
- Metacognition (1)
- Parallel File Systems (1)
- Parallel I/O (1)
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- Ray tracing (1)
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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
A Cognitive Model For Problem Solving In Computer Science, Jennifer Parham
A Cognitive Model For Problem Solving In Computer Science, Jennifer Parham
All Dissertations
According to industry representatives, computer science education needs to emphasize the processes involved in solving computing problems rather than their solutions. Most of the current assessment tools used by universities and computer science departments analyze student answers to problems rather than investigating the processes involved in solving them. Approaching assessment from this perspective would reveal potential errors leading to incorrect solutions.
This dissertation proposes a model describing how people solve computational problems by storing, retrieving, and manipulating information and knowledge. It describes how metacognition interacts with schemata representing conceptual and procedural knowledge, as well as with the external sources of …
Visuohaptic Simulation Of A Borescope For Aircraft Engine Inspection, Deepak Vembar
Visuohaptic Simulation Of A Borescope For Aircraft Engine Inspection, Deepak Vembar
All Dissertations
Consisting of a long, fiber optic probe containing a small CCD camera controlled by hand-held articulation interface, a video borescope is used for remote visual inspection of hard to reach components in an aircraft. The knowledge and psychomotor skills, specifically the hand-eye coordination, required for effective inspection are hard to acquire through limited exposure to the borescope in aviation maintenance schools. Inexperienced aircraft maintenance technicians gain proficiency through repeated hands-on learning in the workplace along a steep learning curve while transitioning from the classroom to the workforce.
Using an iterative process combined with focused user evaluations, this dissertation details the …
Examining The Dynamics Of Managing Information Systems Development Projects: A Control Loss Perspective, Ravi Narayanaswamy
Examining The Dynamics Of Managing Information Systems Development Projects: A Control Loss Perspective, Ravi Narayanaswamy
All Dissertations
The failure rate of information systems development (ISD) projects continues to pose a big challenge for organizations. The success rate of ISD projects is less then forty percent. Factors such as disagreements and miscommunications among project manager and team members, poor monitoring and intermediary problems contribute to project failure.
Agency theory and leader member exchange (LMX) theories offer potential explanations for project failure. In particular, three monitoring strategies - control strategy, decision rights, and influence tactics were found to be effective in promoting project success. LMX theorists suggest that achieving congruence between the manager and subordinate regarding each other actions …
A Study Of Client-Based Caching For Parallel I/O, Bradley Settlemyer
A Study Of Client-Based Caching For Parallel I/O, Bradley Settlemyer
All Dissertations
The trend in parallel computing toward large-scale cluster computers running thousands of cooperating processes per application has led to an I/O bottleneck that has only gotten more severe as the the number of processing cores per CPU has increased. Current parallel file systems are able to provide high bandwidth file access for large contiguous file region accesses; however, applications repeatedly accessing small file regions on unaligned file region boundaries continue to experience poor I/O throughput due to the high overhead associated with accessing parallel file system data.
In this dissertation we demonstrate how client-side file data caching can improve parallel …
Fast Rendering Of Forest Ecosystems With Dynamic Global Illumination, Jay Steele
Fast Rendering Of Forest Ecosystems With Dynamic Global Illumination, Jay Steele
All Dissertations
Real-time rendering of large-scale, forest ecosystems remains
a challenging problem, in that important global illumination effects,
such as leaf transparency and inter-object light scattering, are
difficult to capture, given tight timing constraints and scenes
that typically contain hundreds of millions of primitives.
We propose a new lighting model, adapted from
a model previously used to light convective clouds and other
participating media,
together with GPU ray tracing, in order to achieve these global illumination
effects while maintaining near real-time performance. The lighting
model is based on a lattice-Boltzmann method in which
reflectance, transmittance, and absorption parameters are
taken from measurements …