Index Catalog // ScholarsArchive@OSU

Designing for the Future : A Generalized Software Architecture for Virtual Labs

Creator:: Thompson, Kyle B.
Abstract:: In recent years, simulated laboratory experiences have become more prevalent in educational curricula. These simulations, called virtual labs, can enable learning in ways that are not limited by physical constraints. The development of virtual labs is often ad hoc, resulting in unnecessary, repetitive work. The purpose of this thesis is...
Resource Type:: Honors College Thesis

A statistical inference framework for finding recurring patterns in large data with applications to energy management

Creator:: You, Zeyu
Abstract:: We consider the problem of finding unknown patterns that are recurring across multiple sets. For example, finding multiple objects that are present in multiple images or a short DNA code that is repeated across multiple DNA sequences. We first consider a simple problem of finding a single unknown pattern in...
Resource Type:: Masters Thesis

An advanced study of wind power variability on the Federal Columbia River Power System

Creator:: Lajoie, Kelcey A.
Abstract:: Renewable energy, particularly wind power, has increased dramatically over the past two decades. In the Pacific Northwest, the power system has accommodated a large amount of new wind power. The variability of wind power has introduced many challenges, requiring additional reserve generation to be available to maintain system stability. The...
Resource Type:: Masters Thesis

Hierarchical graphical models for activity recognition in videos

Creator:: Amer, Mohamed R.
Abstract:: This dissertation addresses the problem of recognizing human activities in videos. Our focus is on activities with stochastic structure, where the activities are characterized by variable space-time arrangements of actions, and conducted by a variable number of actors. These activities occur frequently in sports and surveillance videos. They may appear...
Resource Type:: Dissertation

Design techniques for low-power electrical and optical serial link receivers

Creator:: Bai, Rui
Abstract:: As computation power continues to grow, the demand for data transfer bandwidth is also rising. This is reflected in the increasing data-rate of high-speed links. However, the increase in data-rate is sustainable only if the I/O energy efficiency improves as well. This dissertation explores several techniques to enable high-speed links...
Resource Type:: Dissertation

Analysis and design on low-power short-range radios for wireless body area networks

Creator:: Cheng, Jiao
Abstract:: The release of the IEEE802.15.6 standard has led to increased interest in low-power technologies for wireless body-area-networks (WBANs). The power dissipation, supply voltage, and die area are some of the most important criteria for successful WBAN implementations. Digital-intensive RX architectures can potentially result in sub-1V operation with significant reductions in...
Resource Type:: Dissertation

Methods to improve the reliability and resiliency of near/sub-threshold digital circuits

Creator:: Crop, Joseph A.
Abstract:: Energy consumption is one of the primary bottlenecks to both large and small scale modern compute platforms. Reducing the operating voltage of digital circuits to voltages where the supply voltage is near or below the threshold of the transistors has recently gained attention as a method to reduce the energy...
Resource Type:: Dissertation

Development of high efficiency solar absorbers

Creator:: Ravichandran, Ram
Abstract:: Current cadmium telluride and copper indium gallium diselenide thin-film solar cells (TFSCs) utilize thick absorbers (2 - 4 μm). For efficient carrier extraction in these TFSCs, the absorber layer requires high carrier mobilities and a long minority carrier lifetime, which necessitates the use of a high purity, defect-free thin film....
Resource Type:: Dissertation

Resource allocation optimization in large scale distributed systems

Creator:: Duong-Ba, Thuan Hong
Abstract:: We studied the problem of resource allocation in large scale distributed applications such as Online Social Networks (OSN) and Cloud Computing. In such settings, resource allocation schemes need to efficient as well as adaptive to the time-varying environments. The abstract resource allocation problem concerns with how to optimally use resources...
Resource Type:: Dissertation

Compensation method of the excess loop delay in continuous-time delta-sigma ADCs based on model matching approach

Creator:: Guo, Jia
Abstract:: Continues-Time (CT) Delta-Sigma (ΔΣ) Analog-to-Digital Converters (ADCs) have one important constrain, namely the excess loop delay. Most previous excess lop delay compensation methods need to know the exact value of the excess loop delay in advance. However, the value of the excess loop delay is a uniformly distribution random variable....
Resource Type:: Masters Thesis

Design techniques for delta sigma modulators using VCO based ADCs

Creator:: Reddy, Karthikeyan
Abstract:: VCO-based ADCs have recently emerged as attractive alternative to conventional DeltaSigma (ΔΣ) modulator architectures. Few salient features of a VCObased ADC are: 1) the quantization noise is 1st order noise shaped, 2) it is an open loop architecture, and, 3) its implementation is mostly digital in nature. Hence, they are...
Resource Type:: Dissertation

Design techniques for VCO based digital sensor readout circuits

Creator:: Prabha, Praveen
Abstract:: Sensors find a variety of applications in portable electronics, automotive and biomedical solutions. The demand for low power and high dynamic range makes the design of digital sensor readout circuits quite challenging. Traditionally, these circuits are realized using amplifiers with passive feedback or precision analog comparators which are power hungry...
Resource Type:: Masters Thesis

A remotely operated, autonomous wave energy converter system

Creator:: Lewis, Timothy M.
Abstract:: The potential for electric energy generation from ocean waves is substantial and much research is being conducted on the conversion process as a renewable, grid-connected, power source. Some of the same attributes that make wave energy harvesting attractive as a grid-connected source also make it attractive as a remote, or...
Resource Type:: Dissertation

Low-power successive approximation analog to digital converter with digital calibration

Creator:: Li, Wei
Abstract:: IC designers are continuously facing the challenges from reduced CMOS feature sizes and supply voltages. ADCs that deliver satisfactory resolutions/speeds while utilizing the state-of-the-art technologies to save power are in high demand. The analog circuits are more and more assisted by various digital calibration techniques to get boosted performances. This...
Resource Type:: Dissertation

Thermally-stable amorphous metal thin films

Creator:: McGlone, John M.
Abstract:: Amorphous metal thin films (AMTFs) are of potential use for metal-insulator-metal (MIM) tunnel diode applications due to their ultra-smooth surfaces, a consequence of their amorphous microstructure. The objective of this thesis is to design a thermally-stable AMTF capable of maintaining MIM tunnel diode performance after a post-deposition anneal in excess...
Resource Type:: Masters Thesis

Characterization of liquid droplets from inkjet printers by optical scattering

Creator:: Wang, Xiangyu
Abstract:: Due to the wide applications of inkjet printers in industry and our daily life, characterization of liquid droplets from inkjet printers, particularly the behaviors of the impact and diffusion of the droplets on the surface of and inside porous medium is of great interest. One conventional characterization method uses high-speed...
Resource Type:: Masters Thesis

Designing bulk acoustic wave resonators for parametric amplification of spin waves

Creator:: Chowdhury, Pratim
Abstract:: Spintronics is an emerging field of research dealing with devices that can potentially exploit the additional degree of freedom provided by the electron spin along with or instead of the conventional electronic charge. One of the most promising aspects of spintronics is the potential use of magnetostatic spin waves as...
Resource Type:: Masters Thesis

Enabling metal-fill-aware design of integrated circuits

Creator:: Shilimkar, Vikas S.
Abstract:: In advanced integrated circuit (IC) processes, the metal fill inserted to meet foundry imposed density requirements degrades the performance of interconnects and passive components which ultimately affects the overall circuit performance. Accounting for this degradation through electromagnetic and equivalent circuit modeling is becoming a critical aspect of IC design. However,...
Resource Type:: Dissertation

Fabrication of a flexible glucose sensing catheter for human implantation

Creator:: Matthews, David J.
Abstract:: Flexible electronics processing techniques were applied to integrate a glucose sensor with a hormone-delivery catheter in order to create a cheap and minimally invasive method for patients with type 1 diabetes to continually monitor and control their blood sugar levels. Ultimately, this work intends to move toward the development of...
Resource Type:: Masters Thesis

Adaptive broadband wireless interference mitigation architecture applying higher order statistics algorithm for computer platform

Creator:: Wang, Qiwei
Abstract:: The broadband wireless interference in a computer platform is resulted by multiple electro-magnetic emission sources. This non-Gaussian interference is proved to be double-sided K-distributed in previous research. With the limitation of transmission power and dimension of the device, interference mitigation is an efficient way to improve received signal bit error...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Designing for the Future : A Generalized Software Architecture for Virtual Labs

A statistical inference framework for finding recurring patterns in large data with applications to energy management

An advanced study of wind power variability on the Federal Columbia River Power System

Hierarchical graphical models for activity recognition in videos

Design techniques for low-power electrical and optical serial link receivers

Analysis and design on low-power short-range radios for wireless body area networks

Methods to improve the reliability and resiliency of near/sub-threshold digital circuits

Development of high efficiency solar absorbers

Resource allocation optimization in large scale distributed systems

Compensation method of the excess loop delay in continuous-time delta-sigma ADCs based on model matching approach

Design techniques for delta sigma modulators using VCO based ADCs

Design techniques for VCO based digital sensor readout circuits

A remotely operated, autonomous wave energy converter system

Low-power successive approximation analog to digital converter with digital calibration

Thermally-stable amorphous metal thin films

Characterization of liquid droplets from inkjet printers by optical scattering

Designing bulk acoustic wave resonators for parametric amplification of spin waves

Enabling metal-fill-aware design of integrated circuits

Fabrication of a flexible glucose sensing catheter for human implantation

Adaptive broadband wireless interference mitigation architecture applying higher order statistics algorithm for computer platform

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