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Full-Text Articles in Entire DC Network
Nonrigid Image Registration By The Deformation Based Grid Generation, Chih-Yao Hsieh
Nonrigid Image Registration By The Deformation Based Grid Generation, Chih-Yao Hsieh
Computer Science and Engineering Dissertations - Archive
A novel nonrigid image registration algorithm is developed using a well-established mathematic work known as deformation based grid generation. The deformation based grid generation is capable to generate a grid free of mesh folding, which is achieved by devising a positive monitor function describing the anticipated grid point density in the computational domain. Based on this method, a novel nonrigid image registration algorithm is successfully developed with many interesting features. First of all, the functional to be optimized during the image registration process consists of only one term — the similarity term. Thus, no regularization functional is required in this …
Searching And Ranking Xml Data In A Distributed Environment, Weimin He
Searching And Ranking Xml Data In A Distributed Environment, Weimin He
Computer Science and Engineering Dissertations - Archive
Due to the increasing number of independent data providers on the web, there is a growing number of web applications that require searching and querying data sources distributed at different locations over the internet. Since XML is rapidlygaining in popularity as a universal data format for data exchange and integration, locating and ranking distributed XML data on the web are gaining importance in the database community. Most of existing XML indexing techniques combine structure indexes and inverted lists extracted from XML documents to fully evaluate a full-text query against these indexes and return the actual XML fragments of the query …
Regridding In Nonrigid Image Registration, Ting-Hung Lin
Regridding In Nonrigid Image Registration, Ting-Hung Lin
Computer Science and Engineering Dissertations - Archive
Regridding was first introduced in viscous fluid registration for preventing folding of the transformation and for maintaining the admissible deformation field in large-deformation nonrigid image registration applications. We investigated the application of regridding to leading nonrigid image registration algorithms, including elastic, fluid, diffusion, curvature, and demons algorithms, and compared the performance and accuracy in each case.We also introduce a grid repairing mechanism based on the adaptive grid-generation method to prevent the transformation from folding. The grid repairing method can be used in conjunction with the proposed regridding scheme to set bounds on the Jacobian determinant of the transformation. We showed …
Computational Analysis Of Structure And Function Of Genomic Sequences, Abanish Singh
Computational Analysis Of Structure And Function Of Genomic Sequences, Abanish Singh
Computer Science and Engineering Dissertations - Archive
The genetic code consists of long chains of deoxyribonucleic acid (DNA) present in every cell of a living organism. These chains contain both functional and non-functional DNA sequences, and their proportion in the mix varies widely along the tree of life. Generally, more complex organisms tend to feature large amounts of "junk" DNA, whose importance is still subject of a debate in the scientific circles. The functional sequences include coding sequences (genes) and various types of signals, mostly, but not exclusively, controlling the regulation of coding sequences, i.e. activating and deactivating the expression of genes, during the developmental stage, in …
Helmholtz's Theorem Based Parametric Non-Rigid Image Registration, Hsi-Yue S. Hsiao
Helmholtz's Theorem Based Parametric Non-Rigid Image Registration, Hsi-Yue S. Hsiao
Computer Science and Engineering Dissertations - Archive
Helmholtz's theorem states that, with suitable boundary condition, a vector field is completely determined if both of its divergence and curl are specified everywhere. Based on this, we developed a new parametric non-rigid image registration algorithm. Instead of the displacements of regular control grid points, the curl and divergence at each grid point are employed as the parameters. This leads to a very simple mathematical model - two Poisson equations in 2-D or three Poisson equations in 3-D which will be used to solve for the displacement field. The similarity measure is sum of squared difference. And multi-resolution is applied …
A Particle Filter Based Framework For Indoor Wireless Localization Using Custom Ieee 802.15.4 Nodes, Vijay Vasant Dixit
A Particle Filter Based Framework For Indoor Wireless Localization Using Custom Ieee 802.15.4 Nodes, Vijay Vasant Dixit
Computer Science and Engineering Theses - Archive
Locating people and objects as soon as possible and fair amount of precision has always been an important part of any organization or industry, especially in manufacturing, healthcare, and logistics. Systems that now have the ability to locate objects or people are called Real Time Location Systems (RTLS). They typically use small low-power transmitters called tags attached to assets (or worn by people) as well as sets of readers that map the location of these tags. Systems that map the longitude and attitude of an object are geo-location systems and generally use GPS for location mapping. Systems that map a …
Dynacet: A Minimum-Effort Driven Dynamic Faceted Search System Over Structured Databases, Haidong Wang
Dynacet: A Minimum-Effort Driven Dynamic Faceted Search System Over Structured Databases, Haidong Wang
Computer Science and Engineering Theses - Archive
In this thesis, we propose minimum-effort driven navigational techniques for enterprise database systems based on the faceted search paradigm. Our proposed techniques dynamically suggest facets for drilling down into the database such that the cost of navigation is minimized. At every step, the system asks the user a question or a set of questions on different facets and depending on the user response, dynamically fetches the next most promising set of facets, and the process repeats. Facets are selected based on their ability to rapidly drill down to the most promising tuples, as well as on the ability of the …
Modeling And Simulation Of A General Motors Conveyor System Using A Custom Decision Optimizer, Mirza Mohammad Lutfe Elahi
Modeling And Simulation Of A General Motors Conveyor System Using A Custom Decision Optimizer, Mirza Mohammad Lutfe Elahi
Computer Science and Engineering Theses - Archive
The temporal behavior of conveyor systems can be modeled using discrete event (DE) simulations. DE modeling provides a quick and cost effective method for analyzing complex problems as different scenarios can be tested rapidly without affecting the day to day activities of production systems. A simulation model coupled with decision optimization on routing choices enables the evaluation of different decision strategies.In the General Motors paint shop at Arlington, Texas, the complex conveyor system moving cars to the paint booths has been observed to mix up same color batches of cars coming from the body shop. At the paint booth, every …
Use Of Wireless Signal Characteristics For Mobile Robotics Localization And Access Point Mapping, Joshua Davies
Use Of Wireless Signal Characteristics For Mobile Robotics Localization And Access Point Mapping, Joshua Davies
Computer Science and Engineering Theses - Archive
Mobile robotics is an interesting and challenging emerging field in computer science.To properly achieve true autonomy, a robot must be able to determine where it is in relationshipto a global frame of reference and it must be able to do so with a minimum of interaction fromhuman operators and impose as few constraints on its surroundings as possible. The uncertainnature of mobility and perception requires that advanced probabilistic inference techniques beapplied to minimize error. This work examines the applicability of radio-frequency signals to the mobile robotlocalization problem to localize quickly over a wide area. Particle filtering techniques areemployed to adjust …
Towards An Implementation Of Avoip: Anonymous Voice-Over-Ip, Bikas Raj Gurung
Towards An Implementation Of Avoip: Anonymous Voice-Over-Ip, Bikas Raj Gurung
Computer Science and Engineering Theses - Archive
Voice over IP (VoIP) is one of the fastest growing telecommunicaiton market today. However with great popularity comes greater security risk. When we communicate over the Internet we expose our identity to all the prying eyes, even if we do not want to. Even though VoIP data can be secured by using encryption, sometimes the relationships between users can be sensitive. To provide stronger privacy for these users, we propose anonymous VoIP (aVoIP) - a means to secure user privacy in VoIP. The biggest challenge in introducing anonymity to VoIP system is in providing acceptable Quality of Service (QoS). Users …
Temporal Potential Function Approach For Path Planning In Dynamic Environments, Vamsikrishna Gopikrishna
Temporal Potential Function Approach For Path Planning In Dynamic Environments, Vamsikrishna Gopikrishna
Computer Science and Engineering Theses - Archive
A Dynamic environment is one in which either the obstacles or the goal or both are in motion. In most of the current research, robots attempting to navigate in dynamic environments use reactive systems. Although reactive systems have the advantage of fast execution and low overheads, the tradeoff is in performance in terms of the path optimality. Often, the robot ends up tracking the goal, thus following the path taken by the goal, and deviates from this strategy only to avoid a collision with an obstacle it may encounter. In a path planner, the path from the start to the …
Adapting Harmonic Function Path Planning: To Reflect User Motion Preferences, Giles John D'Silva
Adapting Harmonic Function Path Planning: To Reflect User Motion Preferences, Giles John D'Silva
Computer Science and Engineering Theses - Archive
Every human in the real world has a unique motion preference while moving to achieve a given task. These preferences could be expressed by moving in a straight line, following the wall along a corridor, avoiding sharp turns, preferring hard flat surfaces over damp uneven surfaces, choosing the shortest path to the goal or by giving a high priority towards safety by maintaining a definite distance from obstacles. To automatically incorporate user preferences into motion planning we could extract the trajectories taken by the user to achieve a task in a given local vironment and attempt to use them in …
A Framework For Efficient Data Distribution In Peer-To-Peer Networks., Darshan Purandare
A Framework For Efficient Data Distribution In Peer-To-Peer Networks., Darshan Purandare
Electronic Theses and Dissertations
Peer to Peer (P2P) models are based on user altruism, wherein a user shares its content with other users in the pool and it also has an interest in the content of the other nodes. Most P2P systems in their current form are not fair in terms of the content served by a peer and the service obtained from swarm. Most systems suffer from free rider's problem where many high uplink capacity peers contribute much more than they should while many others get a free ride for downloading the content. This leaves high capacity nodes with very little or no …
Real-Time Realistic Rendering Of Nature Scenes With Dynamic Lighting, Kevin Boulanger
Real-Time Realistic Rendering Of Nature Scenes With Dynamic Lighting, Kevin Boulanger
Electronic Theses and Dissertations
Rendering of natural scenes has interested the scientific community for a long time due to its numerous applications. The targeted goal is to create images that are similar to what a viewer can see in real life with his/her eyes. The main obstacle is complexity: nature scenes from real life contain a huge number of small details that are hard to model, take a lot of time to render and require a huge amount of memory unavailable in current computers. This complexity mainly comes from geometry and lighting. The goal of our research is to overcome this complexity and to …
Taming Crowded Visual Scenes, Saad Ali
Taming Crowded Visual Scenes, Saad Ali
Electronic Theses and Dissertations
Computer vision algorithms have played a pivotal role in commercial video surveillance systems for a number of years. However, a common weakness among these systems is their inability to handle crowded scenes. In this thesis, we have developed algorithms that overcome some of the challenges encountered in videos of crowded environments such as sporting events, religious festivals, parades, concerts, train stations, airports, and malls. We adopt a top-down approach by first performing a global-level analysis that locates dynamically distinct crowd regions within the video. This knowledge is then employed in the detection of abnormal behaviors and tracking of individual targets …
Ranking Competencies For Software Developers In Thailand, Nantaporn Booneka, Paiboon Kiattikomol
Ranking Competencies For Software Developers In Thailand, Nantaporn Booneka, Paiboon Kiattikomol
EDU-COM International Conference
The purpose of this study was to prioritize/rank 12 existing software developer competencies and to find the pattern correlation among these competencies. A survey was designed to elicit responses from a target group (N=350) of software developers, system analysts, lecturers in Information and Communication Technology (ICT), ICT managers and others related to software industry (e.g. information technologist, software architect, computer technicians) in 14 organizations in Thailand. The return rate was 80.57% or 282 out of 350. Data was analyzed using descriptive statistics. Factor analysis was used to identify correlations among the 12 competencies. The 12 competencies were previously identified in …
Personalized Web Content With Fuzzy System, Bassam Almogahed
Personalized Web Content With Fuzzy System, Bassam Almogahed
Master's Projects
In this paper, we will develop a new computational intelligence methodology to automatically analyze and summarize web content during a user surfing sessions. The output of this process is meaningful keywords or phrases which will be used to bring the user other contents such as images that closely relate to the web pages that he or she is currently surfing.
The Prosody Of Uncertainty For Spoken Dialogue Intelligent Tutoring Systems, Bevan Jones
The Prosody Of Uncertainty For Spoken Dialogue Intelligent Tutoring Systems, Bevan Jones
Master's Projects
The speech medium is more than an audio conveyance of word strings. It contains meta information about the content of the speech. The prosody of speech, pauses and intonation, adds an extra dimension of diagnostic information about the quality of a speaker's answers, suggesting an important avenue of research for spoken dialogue tutoring systems. Tutoring systems that are sensitive to such cues may employ different tutoring strategies based on detected student uncertainty, and they may be able to perform more precise assessment of the area of student difficulty. However, properly identifying the cues can be challenging, typically requiring thousands of …
Semantic Categorization Of Online Video, Supraja Swarna
Semantic Categorization Of Online Video, Supraja Swarna
Master's Projects
As internet users are increasing day by day, the users of video-sharing site are also increasing. Video-sharing is becoming more and more popular in e-learing, but the current famous websites like youtube are not structured when it come to serving the purpose of providing educational videos for preschool and high school students. There is a need to fill building more educationally focused video site, where the content is more structured, easy to use, support both direct search and browsing, and follow a particular curriculum for preschool and high school students. This report discuss the issues like categorization and search interface …
Creating A Web-Based Knowledge-Building Team: Design Of Tasks, Scaffolds And Social Affordances, Catherine Mcloughlin, Joseph Luca
Creating A Web-Based Knowledge-Building Team: Design Of Tasks, Scaffolds And Social Affordances, Catherine Mcloughlin, Joseph Luca
Research outputs pre 2011
In a blended learning environment, where students undertake professional skills development in the workplace, a flexible environment is designed in order to support problem solving in project management. The design of the environment, informed by socio-cultural theory, was intended to support knowledge building among students, and in particular to support exchange of ideas, peer review and commentary on solutions presented to problems, and a reflective space for exchange of ideas. The online environment incorporates a number of functional affordances that scaffold knowledge exchange, collaborative tasks and peer commentary. The design features of the online site are described and a proposed …
Energy Efficient Clustering And Secure Data Aggregation In Wireless Sensor Networks, Julia Albath
Energy Efficient Clustering And Secure Data Aggregation In Wireless Sensor Networks, Julia Albath
Doctoral Dissertations
"Communication consumes the majority of a wireless sensor network's limited energy. There are several ways to reduce the communication cost. Two approaches used in this work are clustering and in-network aggregation. The choice of a cluster head within each cluster is important because cluster heads use additional energy for their responsibilities and that burden needs to be carefully distributed. We introduce the energy constrained minimum dominating set (ECDS) to model the problem of optimally choosing cluster heads in the presence of energy constraints. We show its applicability to sensor networks and give an approximation algorithm of O(log n) for solving …
Use And Analysis Of Expected Similarity Of Semantic Web Ontological Annotations, Joe Lynn Look
Use And Analysis Of Expected Similarity Of Semantic Web Ontological Annotations, Joe Lynn Look
CCAC Theses and Dissertations
This dissertation studied various means of calculating similarity in the annotations of web pages compared to the similarity of the document text. A software tool, named Semantic Web Analysis of Similarity (SW AS), was developed and utilized to perform the analysis of similarity in annotated documents published from the first three years of the International Semantic Web Conference. Rules concerning the ontological concepts of the documents were specified and these rules as well as other parameters were varied to determine the effect on overall similarity measures. Traditional measures of similarity as well as enhanced measures of similarity proposed for this …
Web 2.0 Tools Improve Teaching And Collaboration In High School English Language Classes, Mahmud Shihab
Web 2.0 Tools Improve Teaching And Collaboration In High School English Language Classes, Mahmud Shihab
CCAC Theses and Dissertations
Web 2.0 tools, namely blogs, wikis, podcasts, and RSS were introduced to change teaching practices of in-service high school teachers to improve the collaboration of today's students in the English language classroom. Two high school teachers of English language and their classes participated. The teachers were interviewed about their current teaching practices and provided with training to develop teaching units that use Web 2.0 to engage students as active collaborators in their learning. They integrated blogs, podcasts, wikis, and RSS into their teaching. Additional interviews were conducted during and after the implementation stage. Implementation strategies, changes in teaching practices, challenges …
Method Of Moments Solution By Using Sinc-Type Basis Functions For The Scattering From A Finite Number Of Conducting Strip Gratings, Taner Oğuzer, Fadil Kuyucuoğlu
Method Of Moments Solution By Using Sinc-Type Basis Functions For The Scattering From A Finite Number Of Conducting Strip Gratings, Taner Oğuzer, Fadil Kuyucuoğlu
Turkish Journal of Electrical Engineering and Computer Sciences
A numerical method of moments (MoM) solution is applied to the electromagnetic scattering from a periodic finite conducting strip array when the incident electromagnetic plane wave E and H polarizations illuminate the grating. For such grating strip geometry, we deal with singular integral equations arising from Neumann and Dirichlet boundary conditions. MoM is applied using band-limited sinc functions as basis and testing functions. The Galerkin approach is followed in MoM formulation. The properties of the sinc function, with the infinite integral, are exploited in the computations of the main matrix elements. Also, the error in our approach goes to zero …
A Reductio Ad Absurdum Experiment In Sufficiency For Evaluating (Computational) Creative Systems, Dan A. Ventura
A Reductio Ad Absurdum Experiment In Sufficiency For Evaluating (Computational) Creative Systems, Dan A. Ventura
Faculty Publications
We consider a combination of two recent proposals for characterizing computational creativity and explore the sufficiency of the resultant framework. We do this in the form of a gedanken experiment designed to expose the nature of the framework, what it has to say about computational creativity, how it might be improved and what questions this raises.
Heuristic Health Resource Referral (H2r2) Engine, Duy Vo
Heuristic Health Resource Referral (H2r2) Engine, Duy Vo
Master's Projects
Searching for health resources is difficult for many individuals because it requires domain knowledge and understanding of search engines techniques. Our system proposes a paradigm shift whereby users provide as much or as little information as they feel comfortable, and we endeavor to match them with relevant health resources. The system first attempts to identify risk factors through a heuristic engine that employs fuzzy logic and then searches for health resources based on the user’s profile. We aim to unburden the user from having to understand complex health information and sometimes esoteric search techniques. Our preliminary findings show that a …
Multi-Echelon Repairable Item Inventory System With Limited Repair Capacity Under Nonstationary Demands, Hoong Chuin Lau, Huawei Song
Multi-Echelon Repairable Item Inventory System With Limited Repair Capacity Under Nonstationary Demands, Hoong Chuin Lau, Huawei Song
Research Collection School Of Computing and Information Systems
Classical multi-echelon repairable item inventory models are based either on steady-state analysis or infinite repair capacity, which may not work well in situations when the demand is nonstationary, or repair capacity is limited. In this paper, we propose an analytical model for evaluating system performance that works well under limited repair capacity and nonstationary demands. Following the METRIC methodology, we then develop an optimisation algorithm to solve the corrective maintenance problem in military logistics. Experimental results show that our approach yields good solutions efficiently. This work has also resulted in a software that has been field-tested by a military organisation.
Enhancing Recursive Supervised Learning Using Clustering And Combinatorial Optimization (Rsl-Cc), Kiruthika Ramanathan, Sheng Uei Guan
Enhancing Recursive Supervised Learning Using Clustering And Combinatorial Optimization (Rsl-Cc), Kiruthika Ramanathan, Sheng Uei Guan
Research Collection School Of Computing and Information Systems
The use of a team of weak learners to learn a dataset has been shown better than the use of one single strong learner. In fact, the idea is so successful that boosting, an algorithm combining several weak learners for supervised learning, has been considered to be one of the best off-the-shelf classifiers. However, some problems still remain, including determining the optimal number of weak learners and the overfitting of data. In an earlier work, we developed the RPHP algorithm which solves both these problems by using a combination of genetic algorithm, weak learner and pattern distributor. In this paper, …
Parallel And Distributed Computing Using Pervasive Web And Object Technologies, Geoffrey C. Fox, Wojtek Furmanski
Parallel And Distributed Computing Using Pervasive Web And Object Technologies, Geoffrey C. Fox, Wojtek Furmanski
Northeast Parallel Architecture Center
We review the growing power and capability of commodity computing and communication technologies largely driven by commercial distributed information systems. These systems are built from CORBA, Microsoft’s COM, Javabeans, and less sophisticated web and networked approaches. One can abstract these to a three-tier model with largely independent clients connected to a distributed network of servers. The latter host various services including object and relational databases and, of course, parallel and sequential computing. High performance can be obtained by combining concurrency at the middle-server tier with optimized parallel back-end services. The resultant system combines the needed performance for large-scale HPCC applications …
Privacy-Maxent: Integrating Background Knowledge In Privacy Quantification, Wenliang Du, Zhouxuan Teng, Zutao Zhu
Privacy-Maxent: Integrating Background Knowledge In Privacy Quantification, Wenliang Du, Zhouxuan Teng, Zutao Zhu
Electrical Engineering and Computer Science - All Scholarship
Privacy-Preserving Data Publishing (PPDP) deals with the publication of microdata while preserving people’s private information in the data. To measure how much private information can be preserved, privacy metrics is needed. An essential element for privacy metrics is the measure of how much adversaries can know about an individual’s sensitive attributes (SA) if they know the individual’s quasi-identifiers (QI), i.e., we need to measure P(SA | QI). Such a measure is hard to derive when adversaries’ background knowledge has to be considered. We propose a systematic approach, Privacy-MaxEnt, to integrate background knowledge in privacy quantification. Our approach is based on …