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open access

FruitPAL: An IoT-Enabled Framework for Automatic Monitoring of Fruit Consumption in Smart Healthcare

Description: This research proposes FruitPAL and FruitPAL 2.0. They are full automatic devices that can detect fruit consumption to reduce the risk of disease. Allergies to fruits can seriously impair the immune system. A novel device (FruitPAL) detecting fruit that can cause allergies is proposed in this thesis. The device can detect fifteen types of fruit and alert the caregiver when an allergic reaction may have happened. The YOLOv8 model is employed to enhance accuracy and response time in detecting dan… more
Date: December 2023
Creator: Alkinani, Abdulrahman Ibrahim M.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Design of a Low-Cost Spirometer to Detect COPD and Asthma for Remote Health Monitoring

Description: This work develops a simple and low-cost microphone-based spirometer with a scalable infrastructure that can be used to monitor COPD and Asthma symptoms. The data acquired from the system is archived in the cloud for further procuring and reporting. To develop this system, we utilize an off-the-shelf ESP32 development board, MEMS microphone, oxygen mask, and 3D printable mounting tube to keep the costs low. The system utilizes the MEMS microphone to measure the audio signal of a user's exhalati… more
Date: May 2022
Creator: Olvera, Alejandro
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Networking of UAVs Using 802.11s

Description: The thesis simulates the problem of network connectivity that occurs due to the dynamic nature of a network during flight. Nine nodes are provided with initial positions and are flown based on the path provided by leader-follower control algorithm using the server-client model. The application layer provides a point to point connection between the server and client and by using socket programming in the transport layer, a server and clients are established. Each node performs a neighbor discove… more
Date: May 2019
Creator: Polumuru, Pushpa
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Simulink Based Modeling of a Multi Global Navigation Satellite System

Description: The objective of this thesis is to design a model for a multi global navigation satellite system using Simulink. It explains a design procedure which includes the models for transmitter and receiver for two different navigation systems. To overcome the problem, where less number of satellites are visible to determine location degrades the performance of any positioning system significantly, this research has done to make use of multi GNSS satellite signals in one navigation receiver.
Date: December 2016
Creator: Mukka, Nagaraju
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Effects of UE Speed on MIMO Channel Capacity in LTE

Description: With the introduction of 4G LTE, multiple new technologies were introduced. MIMO is one of the important technologies introduced with fourth generation. The main MIMO modes used in LTE are open loop and closed loop spatial multiplexing modes. This thesis develops an algorithm to calculate the threshold values of UE speed and SNR that is required to implement a switching algorithm which can switch between different MIMO modes for a UE based on the speed and channel conditions (CSI). Specifically… more
Date: August 2016
Creator: Shukla, Rahul
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Simulink® Based Design and Implementation of a Solar Power Based Mobile Charger

Description: Electrical energy is used at approximately the rate of 15 Terawatts world-wide. Generating this much energy has become a primary concern for all nations. There are many ways of generating energy among which the most commonly used are non-renewable and will extinct much sooner than expected. Very active research is going on both to increase the use of renewable energy sources and to use the available energy with more efficiency. Among these sources, solar energy is being considered as the most a… more
Date: May 2016
Creator: Mukka, Manoj Kumar
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Exploring Analog and Digital Design Using the Open-Source Electric VLSI Design System

Description: The design of VLSI electronic circuits can be achieved at many different abstraction levels starting from system behavior to the most detailed, physical layout level. As the number of transistors in VLSI circuits is increasing, the complexity of the design is also increasing, and it is now beyond human ability to manage. Hence CAD (Computer Aided design) or EDA (Electronic Design Automation) tools are involved in the design. EDA or CAD tools automate the design, verification and testing of the… more
Date: May 2016
Creator: Aluru, Gunasekhar
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

An Accelerometer-based Gesture Recognition System for a Tactical Communications Application

Description: In modern society, computers are primarily interacted with via keyboards, touch screens, voice recognition, video analysis, and many others. For certain applications, these methods may be the most efficient interface. However, there are applications that we can conceive where a more natural interface could be convenient and connect humans and computers in a more intuitive and natural way. These applications are gesture recognition systems and range from the interpretation of sign language by a … more
Date: December 2015
Creator: Tidwell, Robert S., Jr.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Evaluating the Feasibility of Accelerometers in Hand Gestures Recognition

Description: Gesture recognition plays an important role in human computer Interaction for intelligent computing. Major applications like Gaming, Robotics and Automated Homes uses gesture recognition techniques which diminishes the usage of mechanical devices. The main goal of my thesis is to interpret SWAT team gestures using different types of sensors. Accelerometer and flex sensors were explored extensively to build a prototype for soldiers to communicate in the absence of line of sight. Arm movements we… more
Date: December 2014
Creator: Karlaputi, Sarada
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A Vehicle-collision Learning System Using Driving Patterns on the Road

Description: Demand of automobiles are significantly growing despite various factors, steadily increasing the average number of vehicles on the road. Increase in the number of vehicles, subsequently increases the risk of collisions, characterized by the driving behavior. Driving behavior is influenced by factors like class of vehicle, road condition and vehicle maneuvering by the driver. Rapidly growing mobile technology and use of smartphones embedded with in-built sensors, provides scope of constant devel… more
Date: August 2013
Creator: Urs, Chaitra Vijaygopalraj
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Exploring Memristor Based Analog Design in Simscape

Description: With conventional CMOS technologies approaching their scaling limits, researchers are actively investigating alternative technologies for ever increasing computing and mobile demand. A number of different technologies are currently being studied by different research groups. In the last decade, one-dimensional (1D) carbon nanotubes (CNT), graphene, which is a two-dimensional (2D) natural occurring carbon rolled in tubular form, and zero-dimensional (0D) fullerenes have been the subject of inten… more
Date: May 2013
Creator: Gautam, Mahesh
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A Driver, Vehicle and Road Safety System Using Smartphones

Description: As vehicle manufacturers continue to increase their emphasis on safety with advanced driver assistance systems (ADAS), I propose a ubiquitous device that is able to analyze and advise on safety conditions. Mobile smartphones are increasing in popularity among younger generations with an estimated 64% of 25-34 year olds already using one in their daily lives. with over 10 million car accidents reported in the United States each year, car manufacturers have shifted their focus of a passive approa… more
Date: May 2012
Creator: Gozick, Brandon
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Exploring Process-Variation Tolerant Design of Nanoscale Sense Amplifier Circuits

Description: Sense amplifiers are important circuit components of a dynamic random access memory (DRAM), which forms the main memory of digital computers. The ability of the sense amplifier to detect and amplify voltage signals to correctly interpret data in DRAM cells cannot be understated. The sense amplifier plays a significant role in the overall speed of the DRAM. Sense amplifiers require matched transistors for optimal performance. Hence, the effects of mismatch through process variations must be mini… more
Date: December 2010
Creator: Okobiah, Oghenekarho
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Effective and Accelerated Informative Frame Filtering in Colonoscopy Videos Using Graphic Processing Units

Description: Colonoscopy is an endoscopic technique that allows a physician to inspect the mucosa of the human colon. Previous methods and software solutions to detect informative frames in a colonoscopy video (a process called informative frame filtering or IFF) have been hugely ineffective in (1) covering the proper definition of an informative frame in the broadest sense and (2) striking an optimal balance between accuracy and speed of classification in both real-time and non real-time medical procedure… more
Date: August 2010
Creator: Karri, Venkata Praveen
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A New N-way Reconfigurable Data Cache Architecture for Embedded Systems

Description: Performance and power consumption are most important issues while designing embedded systems. Several studies have shown that cache memory consumes about 50% of the total power in these systems. Thus, the architecture of the cache governs both performance and power usage of embedded systems. A new N-way reconfigurable data cache is proposed especially for embedded systems. This thesis explores the issues and design considerations involved in designing a reconfigurable cache. The proposed reconf… more
Date: December 2009
Creator: Bani, Ruchi Rastogi
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

FPGA Implementation of Low Density Party Check Codes Decoder

Description: Reliable communication over the noisy channel has become one of the major concerns in the field of digital wireless communications. The low density parity check codes (LDPC) has gained lot of attention recently because of their excellent error-correcting capacity. It was first proposed by Robert G. Gallager in 1960. LDPC codes belong to the class of linear block codes. Near capacity performance is achievable on a large collection of data transmission and storage.In my thesis I have focused on h… more
Date: August 2009
Creator: Vijayakumar, Suresh
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Region aware DCT domain invisible robust blind watermarking for color images.

Description: The multimedia revolution has made a strong impact on our society. The explosive growth of the Internet, the access to this digital information generates new opportunities and challenges. The ease of editing and duplication in digital domain created the concern of copyright protection for content providers. Various schemes to embed secondary data in the digital media are investigated to preserve copyright and to discourage unauthorized duplication: where digital watermarking is a viable solutio… more
Date: December 2008
Creator: Naraharisetti, Sahasan
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A CAM-Based, High-Performance Classifier-Scheduler for a Video Network Processor.

Description: Classification and scheduling are key functionalities of a network processor. Network processors are equipped with application specific integrated circuits (ASIC), so that as IP (Internet Protocol) packets arrive, they can be processed directly without using the central processing unit. A new network processor is proposed called the video network processor (VNP) for real time broadcasting of video streams for IP television (IPTV). This thesis explores the challenge in designing a combined class… more
Date: May 2008
Creator: Tarigopula, Srivamsi
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
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Date: May 2006
Creator: Velagapudi, Ramakrishna
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
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Date: December 2006
Creator: Sarivisetti, Gayathri
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
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Date: December 2006
Creator: Ale, Anil Kumar
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Timing and Congestion Driven Algorithms for FPGA Placement

Description: Placement is one of the most important steps in physical design for VLSI circuits. For field programmable gate arrays (FPGAs), the placement step determines the location of each logic block. I present novel timing and congestion driven placement algorithms for FPGAs with minimal runtime overhead. By predicting the post-routing timing-critical edges and estimating congestion accurately, this algorithm is able to simultaneously reduce the critical path delay and the minimum number of routing trac… more
Date: December 2006
Creator: Zhuo, Yue
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Energy-Aware Time Synchronization in Wireless Sensor Networks

Description: I present a time synchronization algorithm for wireless sensor networks that aims to conserve sensor battery power. The proposed method creates a hierarchical tree by flooding the sensor network from a designated source point. It then uses a hybrid algorithm derived from the timing-sync protocol for sensor networks (TSPN) and the reference broadcast synchronization method (RBS) to periodically synchronize sensor clocks by minimizing energy consumption. In multi-hop ad-hoc networks, a depleted … more
Date: December 2006
Creator: Saravanos, Yanos
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

VLSI Architecture and FPGA Prototyping of a Secure Digital Camera for Biometric Application

Description: This thesis presents a secure digital camera (SDC) that inserts biometric data into images found in forms of identification such as the newly proposed electronic passport. However, putting biometric data in passports makes the data vulnerable for theft, causing privacy related issues. An effective solution to combating unauthorized access such as skimming (obtaining data from the passport's owner who did not willingly submit the data) or eavesdropping (intercepting information as it moves from… more
Date: August 2006
Creator: Adamo, Oluwayomi Bamidele
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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