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open access

Two-Phase Spray Cooling with Water/2-Propanol Binary Mixtures for High Heat Flux Focal Source

Description: Two-phase spray cooling has been an emerging thermal management technique offering high heat transfer coefficients and critical heat flux levels, near-uniform surface temperatures, and efficient coolant usage that enables to design of compact and lightweight systems. Due to these capabilities, spray cooling is a promising approach for high heat flux applications in computing, power electronics, and optics. Two-phase spray cooling inherently depends on saturation temperature-pressure relations… more
Date: December 2016
Creator: Obuladinne, Sai Sujith
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Dynamic Behaviors of Historical Wrought Iron Truss Bridges – a Field Testing Case Study

Description: Civil infrastructure throughout the world serves as main arteries for commerce and transportation, commonly forming the backbone of many societies. Bridges have been and remain a crucial part of the success of these civil networks. However, the crucial elements have been built over centuries and have been subject to generations of use. Many current bridges have outlived their intended service life or have been retrofitted to carry additional loads over their original design. A large number of t… more
Date: December 2015
Creator: Hedric, Andrew C.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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

Comparative Analysis and Implementation of High Data Rate Wireless Sensor Network Simulation Frameworks

Description: This thesis focuses on developing a high data rate wireless sensor network framework that could be integrated with hardware prototypes to monitor structural health of buildings. In order to better understand the wireless sensor network architecture and its consideration in structural health monitoring, a detailed literature review on wireless sensor networks has been carried out. Through research, it was found that there are numerous simulation software packages available for wireless sensor ne… more
Date: December 2015
Creator: Laguduva Rajaram, Madhupreetha
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

Rapid Prototyping and Design of a Fast Random Number Generator

Description: Information in the form of online multimedia, bank accounts, or password usage for diverse applications needs some form of security. the core feature of many security systems is the generation of true random or pseudorandom numbers. Hence reliable generators of such numbers are indispensable. the fundamental hurdle is that digital computers cannot generate truly random numbers because the states and transitions of digital systems are well understood and predictable. Nothing in a digital compute… more
Date: May 2012
Creator: Franco, Juan
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

General Purpose Computing in Gpu - a Watermarking Case Study

Description: The purpose of this project is to explore the GPU for general purpose computing. The GPU is a massively parallel computing device that has a high-throughput, exhibits high arithmetic intensity, has a large market presence, and with the increasing computation power being added to it each year through innovations, the GPU is a perfect candidate to complement the CPU in performing computations. The GPU follows the single instruction multiple data (SIMD) model for applying operations on its data.… more
Date: August 2014
Creator: Hanson, Anthony
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Exploring Simscape™ Modeling for Piezoelectric Sensor Based Energy Harvester

Description: This work presents an investigation of a piezoelectric sensor based energy harvesting system, which collects energy from the surrounding environment. Increasing costs and scarcity of fossil fuels is a great concern today for supplying power to electronic devices. Furthermore, generating electricity by ordinary methods is a complicated process. Disposal of chemical batteries and cables is polluting the nature every day. Due to these reasons, research on energy harvesting from renewable resources… more
Date: May 2017
Creator: Dhayal, Vandana
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

CMOS Active Pixel Sensors for Digital Cameras: Current State-of-the-Art

Description: Image sensors play a vital role in many image sensing and capture applications. Among the various types of image sensors, complementary metal oxide semiconductor (CMOS) based active pixel sensors (APS), which are characterized by reduced pixel size, give fast readouts and reduced noise. APS are used in many applications such as mobile cameras, digital cameras, Webcams, and many consumer, commercial and scientific applications. With these developments and applications, CMOS APS designs are chall… more
Date: May 2007
Creator: Palakodety, Atmaram
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A nano-CMOS based universal voltage level converter for multi-VDD SoCs.

Description: Power dissipation of integrated circuits is the most demanding issue for very large scale integration (VLSI) design engineers, especially for portable and mobile applications. Use of multiple supply voltages systems, which employs level converter between two voltage islands is one of the most effective ways to reduce power consumption. In this thesis work, a unique level converter known as universal level converter (ULC), capable of four distinct level converting operations, is proposed. The sc… more
Date: May 2007
Creator: Vadlmudi, Tripurasuparna
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Hardware and Software Codesign of a JPEG2000 Watermarking Encoder

Description: Analog technology has been around for a long time. The use of analog technology is necessary since we live in an analog world. However, the transmission and storage of analog technology is more complicated and in many cases less efficient than digital technology. Digital technology, on the other hand, provides fast means to be transmitted and stored. Digital technology continues to grow and it is more widely used than ever before. However, with the advent of new technology that can reproduce d… more
Date: December 2008
Creator: Mendoza, Jose Antonio
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

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

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
open access

A Dual Dielectric Approach for Performance Aware Reduction of Gate Leakage in Combinational Circuits

Description: Design of systems in the low-end nanometer domain has introduced new dimensions in power consumption and dissipation in CMOS devices. With continued and aggressive scaling, using low thickness SiO2 for the transistor gates, gate leakage due to gate oxide direct tunneling current has emerged as the major component of leakage in the CMOS circuits. Therefore, providing a solution to the issue of gate oxide leakage has become one of the key concerns in achieving low power and high performance CMOS … more
Date: May 2006
Creator: Mukherjee, Valmiki
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
open access

Effects of Minimum Quantity Lubrication in Drilling 1018 Steel.

Description: A common goal for industrial manufacturers is to create a safer working environment and reduce production costs. One common method to achieve this goal is to drastically reduce cutting fluid use in machining. Recent advances in machining technologies have made it possible to perform machining with minimum-quantity lubrication (MQL). Drilling takes a key position in the realization of MQL machining. In this study the effects of using MQL in drilling AISI 1018 steel with HSS tools using a vegetab… more
Date: December 2008
Creator: Shaikh, Vasim
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Energy Harvesting Wireless Piezoelectric Resonant Force Sensor

Description: The piezoelectric energy harvester has become a new powering option for some low-power electronic devices such as MEMS (Micro Electrical Mechanical System) sensors. Piezoelectric materials can collect the ambient vibrations energy and convert it to electrical energy. This thesis is intended to demonstrate the behavior of a piezoelectric energy harvester system at elevated temperature from room temperature up to 82°C, and compares the system’s performance using different piezoelectric materials.… more
Date: December 2013
Creator: Ahmadi, Mehdi
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Kriging Methods to Exploit Spatial Correlations of EEG Signals for Fast and Accurate Seizure Detection in the IoMT

Description: Epileptic seizure presents a formidable threat to the life of its sufferers, leaving them unconscious within seconds of its onset. Having a mortality rate that is at least twice that of the general population, it is a true cause for concern which has gained ample attention from various research communities. About 800 million people in the world will have at least one seizure experience in their lifespan. Injuries sustained during a seizure crisis are one of the leading causes of death in epilep… more
Date: August 2020
Creator: Olokodana, Ibrahim Latunde
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 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

Wireless In-home Ecg Monitoring System with Remote Access

Description: The thesis work details the design and testing of a wireless electrocardiogram (ECG) system. This system includes a wireless ECG device, as well as software packages to visually display the waveform locally on a computer and remotely on a web page. The remote viewing capability also extends to using an Android phone application. The purpose of the system is to serve as a means for a doctor or physician to check up on a patient away from a hospital setting. This system allows for a patient to be… more
Date: August 2012
Creator: Porter, Logan
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Drive Level Dependence of Advanced Piezoelectric Resonators

Description: Resonators are one of the most important parts of electronic products. They provide a stable reference frequency to ensure the operation of these products. Recently, the electronic products have the trend of miniaturization, which rendered the size reduction of the resonators as well [1]. Better design of the resonators relies on a better understanding of the crystals' nonlinear behavior [2]. The nonlinearities affect the quality factor and acoustic behavior of MEMS (Micro-Electro-Mechanical-Sy… more
Date: August 2012
Creator: Xie, Yuan
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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