UNT Theses and Dissertations - 12 Matching Results

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Logic Programming Tools for Dynamic Content Generation and Internet Data Mining

Description: The phenomenal growth of Information Technology requires us to elicit, store and maintain huge volumes of data. Analyzing this data for various purposes is becoming increasingly important. Data mining consists of applying data analysis and discovery algorithms that under acceptable computational efficiency limitations, produce a particular enumeration of patterns over the data. We present two techniques based on using Logic programming tools for data mining. Data mining analyzes data by extract… more
Date: December 2000
Creator: Gupta, Anima
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Memory Management and Garbage Collection Algorithms for Java-Based Prolog

Description: Implementing a Prolog Runtime System in a language like Java which provides its own automatic memory management and safety features such as built--in index checking and array initialization requires a consistent approach to memory management based on a simple ultimate goal: minimizing total memory management time and extra space involved. The total memory management time for Jinni is made up of garbage collection time both for Java and Jinni itself. Extra space is usually requested at Jinni's g… more
Date: August 2001
Creator: Zhou, Qinan
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Automated Defense Against Worm Propagation.

Description: Worms have caused significant destruction over the last few years. Network security elements such as firewalls, IDS, etc have been ineffective against worms. Some worms are so fast that a manual intervention is not possible. This brings in the need for a stronger security architecture which can automatically react to stop worm propagation. The method has to be signature independent so that it can stop new worms. In this thesis, an automated defense system (ADS) is developed to automate defense… more
Date: December 2005
Creator: Patwardhan, Sudeep
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Modeling and reduction of gate leakage during behavioral synthesis of nanoscale CMOS circuits.

Description: The major sources of power dissipation in a nanometer CMOS circuit are capacitive switching, short-circuit current, static leakage and gate oxide tunneling. However, with the aggressive scaling of technology the gate oxide direct tunneling current (gate leakage) is emerging as a prominent component of power dissipation. For sub-65 nm CMOS technology where the gate oxide (SiO2) thickness is very low, the direct tunneling current is the major form of tunneling. There are two contribution parts in… more
Date: May 2006
Creator: Velagapudi, Ramakrishna
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Using Reinforcement Learning in Partial Order Plan Space

Description: Partial order planning is an important approach that solves planning problems without completely specifying the orderings between the actions in the plan. This property provides greater flexibility in executing plans; hence making the partial order planners a preferred choice over other planning methodologies. However, in order to find partially ordered plans, partial order planners perform a search in plan space rather than in space of world states and an uninformed search in plan space leads … more
Date: May 2006
Creator: Ceylan, Hakan
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Comparison and Evaluation of Existing Analog Circuit Simulator using Sigma-Delta Modulator

Description: In the world of VLSI (very large scale integration) technology, there are many different types of circuit simulators that are used to design and predict the circuit behavior before actual fabrication of the circuit. In this thesis, I compared and evaluated existing circuit simulators by considering standard benchmark circuits. The circuit simulators which I evaluated and explored are Ngspice, Tclspice, Winspice (open source) and Spectre® (commercial). I also tested standard benchmarks using the… more
Date: December 2006
Creator: Ale, Anil Kumar
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Design and Optimization of Components in a 45nm CMOS Phase Locked Loop

Description: A novel scheme of optimizing the individual components of a phase locked loop (PLL) which is used for stable clock generation and synchronization of signals is considered in this work. Verilog-A is used for the high level system design of the main components of the PLL, followed by the individual component wise optimization. The design of experiments (DOE) approach to optimize the analog, 45nm voltage controlled oscillator (VCO) is presented. Also a mixed signal analysis using the analog and di… more
Date: December 2006
Creator: Sarivisetti, Gayathri
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

A Language and Visual Interface to Specify Complex Spatial Pattern Mining

Description: The emerging interests in spatial pattern mining leads to the demand for a flexible spatial pattern mining language, on which easy to use and understand visual pattern language could be built. It is worthwhile to define a pattern mining language called LCSPM to allow users to specify complex spatial patterns. I describe a proposed pattern mining language in this paper. A visual interface which allows users to specify the patterns visually is developed. Visual pattern queries are translated into… more
Date: December 2006
Creator: Li, Xiaohui
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

A Multi-Variate Analysis of SMTP Paths and Relays to Restrict Spam and Phishing Attacks in Emails

Description: The classifier discussed in this thesis considers the path traversed by an email (instead of its content) and reputation of the relays, features inaccessible to spammers. Groups of spammers and individual behaviors of a spammer in a given domain were analyzed to yield association patterns, which were then used to identify similar spammers. Unsolicited and phishing emails were successfully isolated from legitimate emails, using analysis results. Spammers and phishers are also categorized into se… more
Date: December 2006
Creator: Palla, Srikanth
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Parallel Analysis of Aspect-Based Sentiment Summarization from Online Big-Data

Description: Consumer's opinions and sentiments on products can reflect the performance of products in general or in various aspects. Analyzing these data is becoming feasible, considering the availability of immense data and the power of natural language processing. However, retailers have not taken full advantage of online comments. This work is dedicated to a solution for automatically analyzing and summarizing these valuable data at both product and category levels. In this research, a system was develo… more
Date: May 2019
Creator: Wei, Jinliang
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Enhanced Approach for the Classification of Ulcerative Colitis Severity in Colonoscopy Videos Using CNN

Description: Ulcerative colitis (UC) is a chronic inflammatory disease characterized by periods of relapses and remissions affecting more than 500,000 people in the United States. To achieve the therapeutic goals of UC, which are to first induce and then maintain disease remission, doctors need to evaluate the severity of UC of a patient. However, it is very difficult to evaluate the severity of UC objectively because of non-uniform nature of symptoms and large variations in their patterns. To address this,… more
Date: August 2019
Creator: Sure, Venkata Leela
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Mining Biomedical Data for Hidden Relationship Discovery

Description: With an ever-growing number of publications in the biomedical domain, it becomes likely that important implicit connections between individual concepts of biomedical knowledge are overlooked. Literature based discovery (LBD) is in practice for many years to identify plausible associations between previously unrelated concepts. In this paper, we present a new, completely automatic and interactive system that creates a graph-based knowledge base to capture multifaceted complex associations among … more
Date: August 2019
Creator: Dharmavaram, Sirisha
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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