Matching Items (17)

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High Efficiency Electronics for Space Applications

Description

The Metal Semiconductor Field Effect Transistor (MESFET) has high potential to enter analog and RF applications due to their high breakdown voltage and switching frequency characteristics. These MESFET devices could

The Metal Semiconductor Field Effect Transistor (MESFET) has high potential to enter analog and RF applications due to their high breakdown voltage and switching frequency characteristics. These MESFET devices could allow for high voltage analog circuits to be integrated with low voltage digital circuits on a single chip in an extremely cost effective way. Higher integration leads to electronics with increased functionality and a smaller finished product. The MESFETs are designed in-house by the research group led by Dr. Trevor Thornton. The layouts are then sent to multi-project wafer (MPW) integrated circuit foundry companies, such as the Metal Oxide Semiconductor Implementation Service (MOSIS) to be fabricated. Once returned, the electrical characteristics of the devices are measured. The MESFET has been implemented in various applications by the research group, including the low dropout linear regulator (LDO) and RF power amplifier. An advantage of the MESFET is that it can function in extreme environments such as space, allowing for complex electrical systems to continue functioning properly where traditional transistors would fail.

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Created

Date Created
  • 2015-05

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Design of Advanced DC-AC Converter for Underprivileged Communities

Description

Growing up in Ghana West Africa, I realized there were a few major obstacles hindering the education of the youth. One of them was the consistent supply of all year-round

Growing up in Ghana West Africa, I realized there were a few major obstacles hindering the education of the youth. One of them was the consistent supply of all year-round power. Therefore, pursuing a career in power electronics, I decided to research and implement a budget-friendly DC-AC converter that can take power from a DC source such as a solar panel to make AC power, suitable for grid-implementation. This project was undertaken with two other colleagues (Ian Vogt and Brett Fennelly), as our Senior Design Capstone project. My colleagues primarily researched into the "advanced" part of the converter such as Volt-VAR, Maximum Power Point Tracking (MPPT), and variable power factor, making the Capstone project be dubbed as "Smart Inverter". In this paper, I elaborate on the entire process of my research and simulation, through the design and layout of the PCB board to milling, soldering and testing. That was my contribution to the capstone project. After testing the board, it was concluded that although the inverter was intended to be the very inexpensive, some electrical and design principles could not be compromised. The converter did successfully invert DC power to AC, but it was only at low voltage levels; it could not withstand the higher voltages. This roadblock stymied the testing of advanced functionalities, paving way for an avenue of further research and implementation.

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Created

Date Created
  • 2018-05

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Ensuring Success in an Industrial Internship: And my personal account of working for Intel

Description

The characteristics possessed by undergraduates who have enjoyed success in an intern position are defined. Through an interview process, four traits were identified: multitasking, strong team work understanding, an inquisitive

The characteristics possessed by undergraduates who have enjoyed success in an intern position are defined. Through an interview process, four traits were identified: multitasking, strong team work understanding, an inquisitive nature, and application of a cross-disciplinary mindset. An exposition of how these four traits are employed to ensure success in an internship setting is then given. Finally, a personal account of a project with Intel is expounded upon. This project addressed the unoptimized characterization test time of an Intel package quality control process. It improved throughput by developing a parallel testing method by increasing package carrier capacity and utilizing simultaneous testing. The final design led to a 4x increase of throughput rate.

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Created

Date Created
  • 2013-05

Electronic Music Composition and Production

Description

This creative project thesis involves electronic music composition and production, and it uses some elements of algorithmic music composition (through recurrent neural networks). Algorithmic composition techniques are used here as

This creative project thesis involves electronic music composition and production, and it uses some elements of algorithmic music composition (through recurrent neural networks). Algorithmic composition techniques are used here as a tool in composing the pieces, but are not the main focus. Thematically, this project explores the analogy between artificial neural networks and neural activity in the brain. This project consists of three short pieces, each exploring these concept in different ways.

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Created

Date Created
  • 2016-05

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An Effective Characterization Methodology for Sub-micron Copper Oxides and Oxide-preventing Surface Finishes with a Short Essay on the Role of SEM in the Continuing Miniaturization of Integrated Circuits

Description

The transition to lead-free solder in the electronics industry has benefited the environment in many ways. However, with new materials systems comes new materials issues. During the processing of copper

The transition to lead-free solder in the electronics industry has benefited the environment in many ways. However, with new materials systems comes new materials issues. During the processing of copper pads, a protective surface treatment is needed to prevent the copper from oxidizing. Characterizing the copper oxidation underneath the surface treatment is challenging but necessary for product reliability and failure analysis. Currently, FIB-SEM, which is time-consuming and expensive, is what is used to understand and analyze the surface treatment-copper oxide(s)-copper system. This project's goals were to determine a characterization methodology that cuts both characterization time and cost in half for characterizing copper oxidation beneath a surface treatment and to determine which protective surface treatment is the best as defined by multiple criterion such as cost, sustainability, and reliability. Two protective surface treatments, organic solderability preservative (OSP) and chromium zincate, were investigated, and multiple characterization techniques were researched. Six techniques were tested, and three were deemed promising. Through our studies, it was determined that the best surface treatment was organic solderability preservative (OSP) and the ideal characterization methodology would be using FIB-SEM to calibrate a QCM model, along with using SERA to confirm the QCM model results. The methodology we propose would result in a 91% reduction in characterization cost and a 92% reduction in characterization time. Future work includes further calibration of the QCM model using more FIB/SEM data points and eventually creating a model for oxide layer thickness as a function of exposure time and processing temperature using QCM as the primary data source. An additional short essay on the role of SEM on the continuing miniaturization of integrated circuits is included at the end. This paper explores the intertwined histories of the scanning electron microscope and the integrated circuit, highlighting how advances in SEM influence integrated circuit advances.

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Date Created
  • 2015-05

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Light Emerging: A Symphonic Dance Suite for Chamber Orchestra and Electronics

Description

Light Emerging is a symphonic dance suite in five movements. The work’s approximate length is 25 minutes; it is scored for flute, oboe, clarinet in Bb, bassoon, horn in F,

Light Emerging is a symphonic dance suite in five movements. The work’s approximate length is 25 minutes; it is scored for flute, oboe, clarinet in Bb, bassoon, horn in F, trumpet in C with loop pedal, trombone, percussion, electronic percussion, piano, strings, and fixed media. Each movement of the dance suite is written to be performed as a standalone piece or together as one multimovement work. The music showcases open quintal sonorities layered in conflicting substructures, which contract into denser brooding passages and transform into tonal fanfares.

Attempting to capture the essence of how humanity uniquely experiences light and assigns personification to it, the composer presents light and dark as the main characters in a grand ballet of good and evil. Prism (Movement I) is an overture that is constantly shifting and evolving. A rainbow of colors is presented by the various orchestra members, as timbral and pitch evolutions showcase the ever-changing perspectives of a prism held to light. Yin/Yang (Movement II) explores the relationship between light and dark. The solo clarinet represents light breaking through the darkness as its colorful flourishes pierce through the brooding fixed media. Sunrise (Movement III) captures the impressive majesty of light bursting over the dark horizon in the early morning. Lux (Movement IV) is a dance of light, using solo trumpet and a chorus of phantom trumpets. Light Eternal (Movement V) expresses the deep need for humans to worship that which is unknown and eternal, and the power of light to overcome the dark. The “March of Eternal Light” signals our end in this world and the journey to the beyond.

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Created

Date Created
  • 2019

Euphonium and Live Interactive Electronics: A Performers Examination of Three New Works

Description

Electro-acoustic compositions throughout the twentieth-century have flourished due to the modern advancements and improvements in technology, including image based interactive software. This project aims to reveal how three composers of

Electro-acoustic compositions throughout the twentieth-century have flourished due to the modern advancements and improvements in technology, including image based interactive software. This project aims to reveal how three composers of different backgrounds utilize the use of euphonium in combination with live interactive electronics. To this date no known works have been composed for this instrumentation.

Advancements in the development of audio software and hardware have helped to improve and rapidly evolve the inclusion of live electronics including the use of performer-triggered events, audio processing, and live electronic decision-making. These technologies can be utilized and explored in various ways. Three composers have been commissioned to each compose a new work focusing on using the timbre of the euphonium in combination with explored electronic sounds, unplanned sounds of nature and the use of the human voice. Each work is performed and examined by the author in order to further explore the electro-acoustic properties of this genre, how they communicate and interact with one another, and how the electronics interact and meld with the sound of the euphonium. Compositional elements in this project include but are not limited to the use of pre-recorded natural and “un-natural” sounds, and the manipulations of both pre-recorded and live sounds through the use of performer triggered events using visual programming languages such as Max/MSP and looping pedals.

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Created

Date Created
  • 2017

Höömii-tsol-thinking computer: applying selected ancient Mongolian vocal practices to contemporary computer music composition

Description

Mongolian overtone singing (höömii) and Mongolian wrestling songs (tsols) are vocal styles that evoke physical and mental strength in the vocalist through the accessing of nature. The phrase “höömii-tsol-thinking

Mongolian overtone singing (höömii) and Mongolian wrestling songs (tsols) are vocal styles that evoke physical and mental strength in the vocalist through the accessing of nature. The phrase “höömii-tsol-thinking computer” conveys my end-goal while composing, performing, and researching for my original composition strong.mng. I wanted to create a work in which the computer would be informed by the performance methods and philosophies employed during Mongolian höömii and tsols.

Strong.mng is a 25-minute production for dancer, live digital illustrator, and overtone singer with a laptop computer serving as both a fixed and interactive responsive musical instrument. The music draws upon themes from höömii and tsols through the lens of virtual fieldwork, which was the research method I used to inform strong.mng. Through the composing and performing of strong.mng, I arrived at the following three-part hypothesis: firstly, the development of a robust symbiotic relationship between höömii, tsols, and today’s electronic music technology may transform the technological devices used into agents of deep ecology and bodily interconnectedness. Secondly, this transformation may metamorphose the performer into a more courageous being who is strengthened both physically and mentally by the Mongolian belief that, when performing höömii and tsols, the musician is drawn into kinship with nature. Lastly, I believe some computer music is restrained in its potential by techno-somatic discreteness as well as anthropocentrism, and that applying philosophies from höömii and tsols can help move computer music more towards a physically embodying means of sonification; one that is also akin with the natural world.

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Created

Date Created
  • 2016

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Development of deformable electronics using microelectromechanical systems (MEMS) based fabrication technologies

Description

This dissertation presents my work on development of deformable electronics using microelectromechanical systems (MEMS) based fabrication technologies. In recent years, deformable electronics are coming to revolutionize the functionality of microelectronics

This dissertation presents my work on development of deformable electronics using microelectromechanical systems (MEMS) based fabrication technologies. In recent years, deformable electronics are coming to revolutionize the functionality of microelectronics seamlessly with their application environment, ranging from various consumer electronics to bio-medical applications. Many researchers have studied this area, and a wide variety of devices have been fabricated. One traditional way is to directly fabricate electronic devices on flexible substrate through low-temperature processes. These devices suffered from constrained functionality due to the temperature limit. Another transfer printing approach has been developed recently. The general idea is to fabricate functional devices on hard and planar substrates using standard processes then transferred by elastomeric stamps and printed on desired flexible and stretchable substrates. The main disadvantages are that the transfer printing step may limit the yield. The third method is "flexible skins" which silicon substrates are thinned down and structured into islands and sandwiched by two layers of polymer. The main advantage of this method is post CMOS compatible. Based on this technology, we successfully fabricated a 3-D flexible thermal sensor for intravascular flow monitoring. The final product of the 3-D sensor has three independent sensing elements equally distributed around the wall of catheter (1.2 mm in diameter) with 120° spacing. This structure introduces three independent information channels, and cross-comparisons among all readings were utilized to eliminate experimental error and provide better measurement results. The novel fabrication and assembly technology can also be applied to other catheter based biomedical devices. A step forward inspired by the ancient art of folding, origami, which creating three-dimensional (3-D) structures from two-dimensional (2-D) sheets through a high degree of folding along the creases. Based on this idea, we developed a novel method to enable better deformability. One example is origami-enabled silicon solar cells. The solar panel can reach up to 644% areal compactness while maintain reasonable good performance (less than 30% output power density drop) upon 40 times cyclic folding/unfolding. This approach can be readily applied to other functional devices, ranging from sensors, displays, antenna, to energy storage devices.

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Created

Date Created
  • 2014

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So, You Want to Do a Piece with Electronics? A Layperson’s Guide to Works for Wind Band and Electronics

Description

The number of compositions that use electronics alongside the wind ensemble has gradually increased in the 21st century, yet these compositions are infrequently programmed past their premieres. Explanations include lack

The number of compositions that use electronics alongside the wind ensemble has gradually increased in the 21st century, yet these compositions are infrequently programmed past their premieres. Explanations include lack of access to necessary resources, unfamiliarity with the repertoire, and inexperience with the technology they require. While there are other barriers to performance, this document focuses on familiarizing the repertoire and providing foundational knowledge necessary to overcome inexperience.

As the number of technology-native composers, audience members, and performers continues to increase, electronics in the ensemble are likely to become more standard. Without knowledge of the technology electronics require, these works will remain inaccessible. Composers attempt to bridge the technological knowledge gap by providing technical instructions for individual pieces, but this does not help people recognize the broader concepts that make all of these works more accessible. This document guides ensemble directors and performers to an understanding of these base concepts by developing a grading system for technology difficulty, assessing pedagogical and performance issues, and providing an annotated list of works currently available for electronics and winds.

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Date Created
  • 2020