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Articles 1 - 16 of 16
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 …
An Animation Framework For Improving The Comprehension Of Tinyos Programs, Sravanthi Dandamudi
An Animation Framework For Improving The Comprehension Of Tinyos Programs, Sravanthi Dandamudi
All Theses
To meet the increasing demand for monitoring of the physical world, there has been an increase in the development of wireless sensor network applications. The TinyOS platform has emerged as a de facto standard for developing these applications. The platform offers a number of advantages, with its support for concurrency, power-efficient operation, and resource-constrained hardware chief among them. However, the benefits come at a price. Even without the TinyOS platform, the inherent parallel and distributed nature of these applications makes it difficult for developers to reason about program behavior. Further, the TinyOS programming model adopts
asynchronous, split-phase execution semantics. Developers …
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 …
Semantic Search, Anup Sawant
Semantic Search, Anup Sawant
All Theses
The thesis describes a Semantic approach towards web search through a stand-alone Java application. An Ontology Web Language(OWL) model is used to build a knowledge database related to different types of Organisms. The goal is to guide the Google web search engine using this OWL model. In the rst approach towards Semantic web search, an inference engine called CLIPS is used and in the second aproach, the Protege-OWL API is used. The thesis goes in detail about the design,
working and comparison of these two approaches. The thesis also deals with design approach for enhancement of the OWL model, once …
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 …
Accurate Tracking Of Objects Using Level Sets, Nalin Senthamil
Accurate Tracking Of Objects Using Level Sets, Nalin Senthamil
All Theses
Our current work presents an approach to tackle the challenging task of tracking objects in Internet videos taken from large web repositories such as YouTube. Such videos more often than not, are captured by users using their personal hand-held cameras and cellphones and hence suffer from problems such as poor quality, camera jitter and unconstrained lighting and environmental settings. Also, it has been observed that events being recorded by such videos usually contain objects moving in an unconstrained fashion. Hence, tracking objects in Internet videos is a very challenging task in the field of computer vision since there is no …
A Study For Scalable Directory In Parallel File Systems, Yang Wu
A Study For Scalable Directory In Parallel File Systems, Yang Wu
All Theses
One of the challenges that the design of parallel file system for
HPC(High Performance Computing) has to face today is maintaining the
scalability to handle the I/O generated by parallel applications that
involve accessing directories containing a large number of entries and
performing hundreds of thousands of operations per second. Currently,
highly concurrent access to large directories is poorly supported in
parallel file systems. As a result, it is important to build a
scalable directory service for parallel file systems to support
efficient concurrent access to larger directories.
In this thesis we demonstrate a scalable directory service designed
for 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 …
Single Command Rendering With Sun Grid Engine, William Robinson
Single Command Rendering With Sun Grid Engine, William Robinson
All Theses
According to the Autodesk website, Autodesk Maya software is a powerful, integrated 3D modeling, animation, visual effects, and rendering solution. While this statement is true in every sense, one quality that this software and its competitors lack is in the area of resource management. Though not as critical to the other tasks in the production line, resource management is a crucial component of successful rendering. Until recently, Digital Production Arts students have been left to their own means to manage the rendering process; however, with the use of Sun Grid Engine, rendering tasks can be simplified to a single-command process, …
Non-Rigid Multi-Modal Object Tracking Using Gaussian Mixture Models, Prakash Chockalingam
Non-Rigid Multi-Modal Object Tracking Using Gaussian Mixture Models, Prakash Chockalingam
All Theses
This work presents an approach to visual tracking based on dividing a target into multiple regions, or fragments. The target is represented by a Gaussian mixture model in a joint feature-spatial space, with each ellipsoid corresponding to a different fragment. The fragment set and its cardinality are automatically adapted to the image data using an efficient region-growing procedure and updated according to a weighted average of the past and present image statistics. The fragment modeling is used to generate a strength map indicating the probability of each pixel belonging to the foreground. The strength map provides vital information about new …
Deploying And Maintaining A Campus Grid At Clemson University, Dru Sepulveda
Deploying And Maintaining A Campus Grid At Clemson University, Dru Sepulveda
All Theses
Many institutions have all the tools needed to create a local grid that aggregates commodity compute resources into an accessible grid service, while simultaneously maintaining user satisfaction and system security. In this thesis, the author presents a three-tiered strategy used at Clemson University to deploy and maintain a grid infrastructure by making resources available to both local and federated remote users for scientific research. Using this approach virtually no compute cycles are wasted. Usage trends and power consumption statistics collected from the Clemson campus grid are used as a reference for best-practices. The loosely-coupled components that comprise the campus grid …
Acceleration Methodology For The Implementation Of Scientific Applications On Reconfigurable Hardware, Phillip Martin
Acceleration Methodology For The Implementation Of Scientific Applications On Reconfigurable Hardware, Phillip Martin
All Theses
The role of heterogeneous multi-core architectures in the industrial and scientific computing community is expanding. For researchers to increase the performance of complex applications, a multifaceted approach is needed to utilize emerging reconfigurable computing (RC) architectures. First, the method for accelerating applications must provide flexible solutions for fully utilizing key architecture traits across platforms. Secondly, the approach needs to be readily accessible to application scientists. A recent trend toward emerging disruptive architectures is an important signal that fundamental limitations in traditional high performance computing (HPC) are limiting break through research. To respond to these challenges, scientists are under pressure to …
Evaluating The Use Of Snmp As A Wireless Network Monitoring Tool For Ieee 802.11 Wireless Networks, Robert Johnson
Evaluating The Use Of Snmp As A Wireless Network Monitoring Tool For Ieee 802.11 Wireless Networks, Robert Johnson
All Theses
The increasing popularity of wireless networks has led to instances of high utilization and congestion, some of which have resulted in an interruption of network service. A thorough understanding of how IEEE 802.11 wireless networks operate is crucial to predicting and preventing future interruptions. There have been many studies performed on wireless networks. Of those that have captured data from the wireless side, most have used a form of wireless network monitoring known as Vicinity Sniffing (wireless sniffing from a location that is physically close to an access point to be in the broadcast range) as the primary means of …
Ocular Vergence Response Over Anaglyphic Stereoscopic Videos, Brian Daugherty
Ocular Vergence Response Over Anaglyphic Stereoscopic Videos, Brian Daugherty
All Theses
The effect of anaglyphic stereographic stimuli on ocular vergence response is examined. An experiment is performed comparing ocular vergence response induced by anaglyphic stereographic display versus standard monoscopic display. Two visualization tools, synchronized three-dimensional scanpath playback and real-time dynamic heatmap generation,
are developed and used to subjectively support the quantitative analysis of ocular disparity. The results of a one-way ANOVA indicate that there is a highly significant effect of anaglyphic stereoscopic display on ocular vergence for a majority of subjects although consistency of vergence response is difficult to predict.
Teaching Specifications Using An Interactive Reasoning Assistant, Dana Leonard
Teaching Specifications Using An Interactive Reasoning Assistant, Dana Leonard
All Theses
The importance of verifiably correct software has grown enormously in recent years as software has become integral to the design of critical systems, including airplanes, automobiles, and medical equipment. Hence, the importance of solid analytical reasoning skills to complement basic programming skills has also increased. If developers cannot reason about the software they design, they cannot ensure the correctness of the resulting systems. And if these systems fail, the economic and human costs can be substantial.
In addition to learning analytical reasoning principles as part of the standard Computer Science curriculum, students must be excited about learning these skills and …