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The Effect Of Heating Area And Wheatstone Bridge Materials On A Thermally Actuated Mems Viscosity Sensor, Connor Michael Levine
The Effect Of Heating Area And Wheatstone Bridge Materials On A Thermally Actuated Mems Viscosity Sensor, Connor Michael Levine
Theses
Being able to accurately measure oil viscosity in real time is critical for multiple applications. It can ensure that the oil being used to protect and lubricate gears and other mechanical elements is good. To do this a thermally actuated micro electromechanical systems (MEMS) based sensor has been previously developed. The sensor is able to measure viscosity by having the fluid couple with the oscillating diaphragm and monitoring the frequency, amplitude and quality factor of the waveform. To improve the accuracy of the sensor, 5 different versions were created to study the effects of heating area and the sensing material …
Reliable Hardware Architectures For Cyrtographic Block Ciphers Led And Hight, Srivatsan Subramanian
Reliable Hardware Architectures For Cyrtographic Block Ciphers Led And Hight, Srivatsan Subramanian
Theses
Cryptographic architectures provide different security properties to sensitive usage models. However, unless reliability of architectures is guaranteed, such security properties can be undermined through natural or malicious faults. In this thesis, two underlying block ciphers which can be used in authenticated encryption algorithms are considered, i.e., LED and HIGHT block ciphers. The former is of the Advanced Encryption Standard (AES) type and has been considered areaefficient, while the latter constitutes a Feistel network structure and is suitable for low-complexity and low-power embedded security applications. In this thesis, we propose efficient error detection architectures including variants of recomputing with encoded operands …
A Charge Control Model For Iii-V Hemts Using A Self-Consistent Numerical Solution Of The Schrodinger And Poisson Equations, Melissa Manney
A Charge Control Model For Iii-V Hemts Using A Self-Consistent Numerical Solution Of The Schrodinger And Poisson Equations, Melissa Manney
Theses
"With the increasing demand for smaller devices that can perform faster and more reliably there is a need to explore options that allow for this combination in spite of the fact that smaller size tends to lead to a reduction in reliability and overall device performance. High electron mobility transistors (HEMTs) have proven superior to MOSFETS and BJTs in the areas of voltage and temperature ranges in which they can operate as well as their high breakdown fields, carrier density and velocity saturation. Studying HEMTs and understanding their constraints and how they respond to variations in their makeup and in …
A Piecewise Linear Approximation D/A Converter For Small Format Lcd Applications, Mark Reisiger
A Piecewise Linear Approximation D/A Converter For Small Format Lcd Applications, Mark Reisiger
Theses
Low power operation is a driving requirement for the advancement of portable consumer electronics. As products get smaller and have more functionality the device integration requirements get tighter. This is certainly true of small format LCD applications like PDAs and cell phones. Recent advances in LCD technology have allowed for advanced circuitry to be built on the glass. This allows for the unique opportunity to integrate the LCD column driver with other circuitry rather than the traditional flip chip mounting on the glass. The integration of these D/A converters with digital circuitry presents a new set of design considerations. These …
A Swarm Intelligence Based Approach To The Mine Detection Problem, Vignesh Munirajan
A Swarm Intelligence Based Approach To The Mine Detection Problem, Vignesh Munirajan
Theses
This research focuses on the application of swarm intelligence to the problem of mine detection. Swarm Intelligence concepts have captivated the interests of researchers mainly in collective robotics, optimization problems (traveling salesman problem (TSP), quadratic assignment problem, graph coloring etc.), and communication networks (routing) etc [1]. In the mine detection problem we are faced with sub problems such as searching for the mines over the minefield, defusing them effectively, and assuring that the field is clear of mines within the least possible time. In the problem, we assume that the mines can be diffused by the collective action of the …
Circle Formation Algorithm For Autonomous Agents With Local Sensing, Andrew Mario Michael
Circle Formation Algorithm For Autonomous Agents With Local Sensing, Andrew Mario Michael
Theses
Research on cooperative robotics has increased radically over the past decade due to its simplicity and applicability in a variety of fields. Shape formation plays an important role in such cooperative behavior. Our work deals with the formation of a circle by a group of mobile agents (robots) that initially are randomly spread and randomly oriented in an unmapped terrain. The agents have simple characteristics and limited capabilities. They are autonomous, homogeneous, anonymous, and memory-less. They do not communicate with each other, but are able to measure the inter-agent distances and angels. The agents follow the same distributed algorithm synchronously …
A Physics-Based Model Of Sic-Based Mesfets, Sankha Mukherjee
A Physics-Based Model Of Sic-Based Mesfets, Sankha Mukherjee
Theses
Silicon Carbide (SiC) has been investigated as an alternative material to Silicon (Si) for enhancing the power-handling capability of semiconductor devices for simultaneous high-temperature and high frequency applications. Its high thermal conductivity, high bandgap, low permittivity, high saturation velocity, moderate mobility, material hardness and chemical inertness make it a prime candidate for power electronics, heat and light sensors, and MEMS applications. The MESFET is the most viable power transistor based on SiC. The performance of SiC MESFETs is limited by trapping and thermal effects. A physics-based analytical model of the SiC MESFET incorporating trapping and thermal effects is reported. The …
A Physics-Based Analytical Model Of An Algan/Gan High Electron Mobility Transistor, Jonathan Sippel
A Physics-Based Analytical Model Of An Algan/Gan High Electron Mobility Transistor, Jonathan Sippel
Theses
Popular semiconductors currently being used for RF applications include GaAs and InP. The operating frequencies for HEMTs built with these semiconductors covers the range from 800 MHz to 100 GHz. Although high-speed operation is attainable using GaAs or InP, product performance is limited when considering high-power applications, where a high breakdown field and thermal conductivity is needed. Proposed about fifteen years ago as a solution to this problem, GaN has emerged as a viable candidate to challenge, and perhaps overtake, GaAs and InP as the dominant semiconductor in RF products, particularly power amplifiers. This is due to its high breakdown …
A Synthesizable Single-Cycle Multiply-Accumulator, John Childs
A Synthesizable Single-Cycle Multiply-Accumulator, John Childs
Theses
The multiplication and multiply-accumulate operations are expensive to implement in hardware for Digital Signal Processing, video, and graphics applications. A standard multiply-accumulator has three inputs and a single output that is equal to the product of two of its inputs added to the third input. For some applications it is desirable for a multiply-accumulator to have two outputs; one output that is the product of the first two inputs, and a second output that is the multiply-accumulate result. The goal of this thesis is to investigate algorithms and architectures used to design multipliers and multiply-accumulators, and to create a multiply-accumulator …
Construction Of M - Band Bandlimited Wavelets For Orthogonal Decomposition, Bryce Tennant
Construction Of M - Band Bandlimited Wavelets For Orthogonal Decomposition, Bryce Tennant
Theses
While bandlimited wavelets and associated IIR filters have shown serious potential in areas of pattern recognition and communications, the dyadic Meyer wavelet is the only known approach to construct bandlimited orthogonal decomposition. The sine scaling function and wavelet are a special case of the Meyer. Previous works have proposed a M - Band extension of the Meyer wavelet without solving the problem. One key contribution of this thesis is the derivation of the correct bandlimits for the scaling function and wavelets to guarantee an orthogonal basis. In addition, the actual construction of the wavelets based upon these bandlimits is developed. …
Equivalent Circuit Models For Package Level Discontinuities And Chip-Package Intersonnects, Maulin Bhagat
Equivalent Circuit Models For Package Level Discontinuities And Chip-Package Intersonnects, Maulin Bhagat
Theses
Equivalent circuit models with closed form expressions, in conjunction with a segmentation technique, have been derived to study three different aspects related to chip-package co-design issues. This technique has been successfully applied to package level discontinuities, chip-package interconnects, and the modeling of transients that affect the performance of an integrated microstrip antenna placed at the RF front end. In each case, circuit models have been developed to include coupling by the use of coupling capacitance and mutual inductance. All circuit elements are defined by closed form expressions. To analyze package level discontinuities various microstrip transmission lines placed in close proximity …
Aisimam - An Artificial Immune System Based Intelligent Multiangent Model, Srividhya Sathyanath
Aisimam - An Artificial Immune System Based Intelligent Multiangent Model, Srividhya Sathyanath
Theses
The goal of this thesis is to develop a biological model for multiagent systems. This thesis explores artificial immune systems, a novel evolutionary paradigm based on the immunological principles. Artificial Immune systems (AIS) are found to be powerful to solve complex computational tasks. The main focus of the thesis is to develop a generic mathematical model that uses the principles of the human immune system in multiagent systems (MAS). The components and properties of the human immune system are studied. On understanding the concepts of A/5, a literature survey of multiagent systems is performed to understand and compare the multiagent …
Variable Bit Rate Video Time-Series And Scene Modeling Using Discrete-Time Statistically Self-Similar Systems, Rajesh Narasimha
Variable Bit Rate Video Time-Series And Scene Modeling Using Discrete-Time Statistically Self-Similar Systems, Rajesh Narasimha
Theses
This thesis investigates the application of discrete-time statistically self-similar (DTSS) systems to modeling of variable bit rate (VBR) video traffic data. The work is motivated by the fact that while VBR video has been characterized as self-similar by various researchers, models based on self-similarity considerations have not been previously studied. Given the relationship between self-similarity and long-range dependence the potential for using DTSS model in applications involving modeling of VBR MPEG video traffic data is presented. This thesis initially explores the characteristic properties of the model and then establishes relationships between the discrete-time self-similar model and fractional order transfer function …
A Three-Dimensional Ray Tracing Simulation Of A Synthetic Aperture Ground Penetrating Radar System, James Iii Jeter
A Three-Dimensional Ray Tracing Simulation Of A Synthetic Aperture Ground Penetrating Radar System, James Iii Jeter
Theses
Ground Penetrating Radar (GPR) is a useful tool for imaging the area below the Earth's surface. GPR works on the same principle as traditional radar, evaluating the electromagnetic returns reflected from an object or scene of interest to determine characteristics of the object that reflected the signal. Synthetic Aperture Radar (SAR) is a technique which combines radar returns of a given scene collected at several positions. By compiling the information contained in the returns, an image of a scene can be generated. Combining these two concepts allows us to create an image of an underground scene. Air Force Research Lab, …
Optimal Design Of A 2.4 Ghz Cmos Low Noise Amplifier, Sharmila Sridharan
Optimal Design Of A 2.4 Ghz Cmos Low Noise Amplifier, Sharmila Sridharan
Theses
In most RF receivers, the Low Noise Amplifier (LNA) is normally the first component, whose performance is very critical. For the LNA architecture that uses source degeneration inductors and cascode topology, the performance depends largely on the performance of the inductors. All the parasitics associated with the inductors should be thoroughly analyzed and taken into consideration while designing the LNA. The work presented in this thesis can be broadly classified as follows: optimization of the LNA design with respect to all the parasitics associated with the on-chip spiral inductors, modeling high performance inductors, which are embedded in the silicon substrate …
Picasso: The Use Of Network Delay Compensation To Improve The Response Of A Tele-Robotic Application, Sara North
Picasso: The Use Of Network Delay Compensation To Improve The Response Of A Tele-Robotic Application, Sara North
Theses
This thesis shows the benefits of network delay compensation over an arbitrary Internet connection for a tele-robotic application. The tele-robotic system, named Picasso, is set up in the Systems Laboratory of the Electrical Engineering Department at the Rochester Institute of Technology. Picasso is a robotic arm that users can connect to via the Internet and draw with. This thesis demonstrates that varying the arm speed based on the predicted time-to-next packet results in smoother motion by the arm and a more accurate representation of what the user is drawing on the screen. The method chosen to predict the time-to-next packet …
A Study Of Clutter Reduction Techniques In Wide Bandwidth Hf/Vhf Deep Ground Penetrating Radar, Darien Hammett
A Study Of Clutter Reduction Techniques In Wide Bandwidth Hf/Vhf Deep Ground Penetrating Radar, Darien Hammett
Theses
Reducing clutter is one of the most daunting problems a radar processing engineer faces. Clutter causes a significant problem when attempting to detect sub-surface targets, as any significant change in the ground dielectric will produce a return at the receiver. The difficulty in reducing the clutter is compounded by the fact that the spectral characteristics of the clutter are similar to that of the target. While there are many methods that exist to reduce clutter, few do not require a priori information of either the target or the clutter. There are applications, of interest to the electromagnetic community, that are …
Passive Amplitude-Modulated Microwave Backscatter Modulation System, Aaron Thompson
Passive Amplitude-Modulated Microwave Backscatter Modulation System, Aaron Thompson
Theses
Barcode technology is slowly being replaced with transponder tags that have many benefits over barcodes. Four issues with transponder tags are battery life, power requirement, range of communication, and physical size. Microwave backscatter modulation (MBM) is used throughout industry to reduce the power requirement and size on the transponder tags while compromising range. Researchers and designers of current transponder tags typically utilize a passive carrier-present carrier-absent (CPCA) reflection of the reader's carrier wave, or their transponder design uses an active backscatter system with an amplifier and circular polarization modulation. This research project develops a communication system that mixes a reader's …
Power Distribution Design For High-Density Packages, Ghanshyam Nayak
Power Distribution Design For High-Density Packages, Ghanshyam Nayak
Theses
This thesis describes the design of a high-density power distribution system. Properties of impedances of power distribution systems are examined. Impedances are classified as self and trans-impedances. These properties are then used to save simulation time, which is a big factor for power distribution system design. Time domain models are extracted for the test cases. A novel 2D-3D technique of placing decoupling capacitors is demonstrated that is based on the effectiveness of the capacitor at that location. The power distribution system acts as a cavity resonator supporting discrete modes that vary with distance. Each capacitor is placed at the physical …
Automatic Indoor/Outdoor Scene Classification, Navid Serrano
Automatic Indoor/Outdoor Scene Classification, Navid Serrano
Theses
The advent and wide acceptance of digital imaging technology has motivated an upsurge in research focused on managing the ever-growing number of digital images. Current research in image manipulation represents a general shift in the field of computer vision from traditional image analysis based on low-level features (e.g. color and texture) to semantic scene understanding based on high-level features (e.g. grass and sky). One particular area of investigation is scene categorization, where the organization of a large number of images is treated as a classification problem. Generally, the classification involves mapping a set of traditional low-level features to semantically meaningful …
Dependence Of Vco Jitter On Coupled Noise, Harikrishna Parthasarathy
Dependence Of Vco Jitter On Coupled Noise, Harikrishna Parthasarathy
Theses
In mixed signal systems, the Phase Locked Loop (PLL) forms an integral part of the clock distribution scheme. The PLL is used to generate a local clock frequency, which is much higher than the external clock. The performance of a PLL is greatly influenced by the Voltage Controlled Oscillator (VCO). Any nonlinearity introduced by the VCO affects the synchronization between operation of on-chip circuitry and the external components. The jitter or phase noise of a VCO is the most important non-ideality. Phase noise or jitter becomes critical as system frequency increases. The source of timing error maybe due to various …
A Very Low Bit-Rate Speech Recognition System, Matthew Baecher
A Very Low Bit-Rate Speech Recognition System, Matthew Baecher
Theses
When using extracted speech feature coefficients for speech synthesis, quantization is considered a lossy compression scheme. The data being compressed cannot be recovered or reconstructed exactly. However, in a speech recognition system for command and control purposes, a certain amount of quantization can be allowed, with comparable results. In some cases, quantization even serves to "close the gaps" between the coefficients of the incoming speech signal and those of the templates. Since the coefficients are not being used to reconstruct the signal, a very coarse quantization can be used, enabling a very low bit-rate transmission with very good recognition results. …
Development And Characterization Of A Sub-Micron Cmos Process As An Educational Tool At Rit, Ivan Puchades
Development And Characterization Of A Sub-Micron Cmos Process As An Educational Tool At Rit, Ivan Puchades
Theses
None provided.
Multiple Document Detection With Ultrasonics, Daniel Phinney
Multiple Document Detection With Ultrasonics, Daniel Phinney
Theses
The purpose of this thesis was to develop a method to detect the occurrence of more than one document being drawn into an automatic document feeder such as is used on photocopiers and document scanners. It was desired that the method developed made no physical contact with these documents, worked with all common document materials and thicknesses. The method actually developed monitors the amplitude and phase changes in ultrasound passed through these documents. By using both the amplitude and phase of the ultrasound, a material and thickness independent method, non contact method was successfully developed.
Adaptive Detection Of Pn-Spread Psk Waveforms In Hf Atmospheric Noise, M. A. Wadsworth
Adaptive Detection Of Pn-Spread Psk Waveforms In Hf Atmospheric Noise, M. A. Wadsworth
Theses
The purpose of this work is to investigate optimal methods for the detection of short duration (burst) PN-spread PSK waveforms in HF atmospheric noise. As has been shown, the optimal detector for any waveform in Gaussian background noise is a matched filter. However, HF atmospheric noise is non-Gaussian, necessitating alternate detector designs. A theoretical approach to an alternate detector design is taken, based on radar clutter modeling techniques and concepts from detection theory. The industry standard model for HF atmospheric noise is contained in COR Report 322-3 (1986). The CCLR 322 noise model is a graphical, empirical model based on …
Localized Temporal Decorrelation For Video Compression, Dinesh Nadarajah
Localized Temporal Decorrelation For Video Compression, Dinesh Nadarajah
Theses
Many of the current video compression algorithms perform analysis and coding operations in a block-wise manner. Most of them use a motion compensated DCT algorithm as the basis. Many other codecs, mostly academic and in their infancy and known as Second Generation techniques, utilize region and contour based and model based techniques. Unfortunately, these second-generation methods have not been successful in gaining widespread acceptance in both the standards and the consumer world. Many of them require specialized computationally intensive software and/or hardware. Due to these shortcomings, current block based methods have been finetuned to get better performance at even very …
Characterization Of Feedback Sustained Pulsation For Wdm-Scm Networks, David Sackett
Characterization Of Feedback Sustained Pulsation For Wdm-Scm Networks, David Sackett
Theses
Most continuous wave laser diodes display varying degrees of self-sustained pulsation (SSP). This pulsation is due to an inhomogeneous cavity. Most SSP investigations have focused on 780 ran laser diodes. In general, SSP is considered a source of high frequency noise. SSP has, however, been used as a subcarrier for multiplexing. This thesis examines SSP characteristics in 1300 nm laser diodes. A 1300 nm SSP laser diode can be used to create a Subcarrier Multiplexing (SCM) Network. The 1300 and 780 nm SCM networks can be fiber spliced to create a Wavelength Division Multiplexing SCM network (WDM-SCM). The SSP laser …
System Identification And Control Of A 3d Truss Structure Using Plid And Lqg, Phillip Vallone
System Identification And Control Of A 3d Truss Structure Using Plid And Lqg, Phillip Vallone
Theses
This thesis deals with the experimental application of a system identification tech nique called pseudo-linear identification (PLID). PLID is a discrete-time, multi-input, multi-output (MEMO), state space, simultaneous parameter estimator and one step ahead state predictor of linear time invariant systems. No measurements are assumed perfect under PLED; that is the inputs and outputs are allowed to have zero mean white gaussian (ZMWG) additive noise. Furthermore, the states are also assumed to have additive ZMWG noise. Like most system identification techniques, PLED requires the system to be completely controllable and observable under the given actuator and sensor suite. The only firm …
M-Ary Run Length Limited Coding, Jian Luo
M-Ary Run Length Limited Coding, Jian Luo
Theses
This thesis consists of two parts: 1) a result of the rationality of channel capacity for the M -ary (d, k) constraint, and 2) a software package which has been designed to aid in the development of efficient, high density channel encoders for M -ary (d, k) constrained recording code. It has been written for the platforms of IBM PC or PC compatible and Sun Workstations. The designed software in this thesis involves three steps. The first step is to calculate the capacity of a RLL code after the user has chosen (M,d,k) . The channel capacity specifies the maximum …
A Study Of Trellis Coded Quantization For Image Compression, Kannan Panchapakesan
A Study Of Trellis Coded Quantization For Image Compression, Kannan Panchapakesan
Theses
Trellis coded quantization has recently evolved as a powerful quantization technique in the world of lossy image compression. The aim of this thesis is to investigate the potential of trellis coded quantization in conjunction with two of the most popular image transforms today; the discrete cosine transform and the discrete wavelet trans form. Trellis coded quantization is compared with traditional scalar quantization. The 4-state and the 8-state trellis coded quantizers are compared in an attempt to come up with a quantifiable difference in their performances. The use of pdf-optimized quantizers for trellis coded quantization is also studied. Results for the …