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Full-Text Articles in Engineering

Nanocluster Thin-Films For Sensor Applications, Joseph Serritella May 2015

Nanocluster Thin-Films For Sensor Applications, Joseph Serritella

HIM 1990-2015

The ability to sense gas such as methane can provide an early warning system to protect human lives. High demand for the ability to sense the world around us has provided an extensive area of research for sensor technology. In particular, current sensor technology, specifically for methane, has provided sensors that require a heated environment to function. The majority of current methane sensors function at temperatures between 150°C and 450°C [1-3]. This thesis will explore an approach to produce a room temperature methane sensor.


Implementation And Testing Of A Blackbox And A Whitebox Fuzzer For File Compression Routines, Toby Tobkin May 2013

Implementation And Testing Of A Blackbox And A Whitebox Fuzzer For File Compression Routines, Toby Tobkin

HIM 1990-2015

Fuzz testing is a software testing technique that has risen to prominence over the past two decades. The unifying feature of all fuzz testers (fuzzers) is their ability to somehow automatically produce random test cases for software. Fuzzers can generally be placed in one of two classes: black-box or white-box. Blackbox fuzzers do not derive information from a program's source or binary in order to restrict the domain of their generated input while white-box fuzzers do. A tradeoff involved in the choice between blackbox and whitebox fuzzing is the rate at which inputs can be produced; since blackbox fuzzers need …


Fabrication And Transport Studies Of N-Type Ofets Using Aligned Array Carbon Nanotubes Electrodes, Edwards Jimenez May 2012

Fabrication And Transport Studies Of N-Type Ofets Using Aligned Array Carbon Nanotubes Electrodes, Edwards Jimenez

HIM 1990-2015

We present fabrication of n-type organic field effect transistors (OFETs) using densely aligned array carbon nanotube (CNT) electrodes. The CNTs were aligned with a high linear density via dielectrophoresis (DEP) from an aqueous solution. In order to fabricate the CNT electrodes, aligned CNTs were cut by using electron beam lithography (EBL) and precise oxygen plasma etching. The n-type OFETs were fabricated in a bottom-contact configuration by depositing a thin film of C60 molecules between the CNT source and drain electrodes, and compared against a controlled C60 OFET with gold electrodes. The electron transport measurements of the OFETs using CNT electrodes …


Assessing The Viability Of Sol-Gel Nimgo Films For Solar Blind Detection, Amber Scheurer May 2011

Assessing The Viability Of Sol-Gel Nimgo Films For Solar Blind Detection, Amber Scheurer

HIM 1990-2015

Wide bandgap semiconductors have been broadly investigated for their potential to detect and emit high energy ultraviolet (UV) photons. Advancements in deep UV optoelectronic materials would enable the efficient and affordable realization of many medical, industrial and consumer UV optical devices. The traditional growth method, vacuum deposition, is an extremely complicated and expensive process. Sol-gel processing dramatically simplifies facility requirements and can be scaled to industrial size. The work presented here involves a novel study of the ternary wide bandgap material Ni1-xMgxO. Films were developed by sol-gel spin coating for investigation of material and electrical properties. This method produced films …


Multi-Pole Permanent Magnet Motor Design And Control For High Performance Electromechanical Actuation In All Electric Aircraft, Jared C. Bindl Jan 2010

Multi-Pole Permanent Magnet Motor Design And Control For High Performance Electromechanical Actuation In All Electric Aircraft, Jared C. Bindl

HIM 1990-2015

The evolution of aircraft has led into a large increase in the demand for electrically integrated subsystems. Part of this demand is the transformation of a centralized hydraulic systems to independently operated electrical subsystems. The result of this overhaul will decrease aircraft weight, increase reliability, reduce aircraft lifetime maintenance and cost, and help to increase the control of power distribution. This thesis proposes the design methodology of a multi-pole permanent magnet (PM) motor with a capability to operate at high temperature. High temperature capability is one of the key requirements to implement electromechanical actuation for aircraft flight control, replace hydraulic …


Modeling And Analysis Of Solar Arrays For Grid Connected Systems With Maximum Power Point Tracking, Adje Mensah Jan 2004

Modeling And Analysis Of Solar Arrays For Grid Connected Systems With Maximum Power Point Tracking, Adje Mensah

HIM 1990-2015

The shrinking of the world’s energy sources has prompted an unprecedented interest in renewable and clean energy sources such as photovoltaic (solar) array. Already popular in space and some industrial power system applications, photovoltaic arrays have yet to become a viable source of energy for most terrestrial applications. For several decades now, engineers have been striving to design reliable and affordable solar array based power systems. One popular approach to achieve reliability is the integration of Maximum Power Point Tracking (MPPT) technology in solar power system design. The purpose of this study was to gain more insight into the nature …


Square Spiral Conformal Microstrip Antennas For Space Vehicles, Nahid Dehestani Jan 1998

Square Spiral Conformal Microstrip Antennas For Space Vehicles, Nahid Dehestani

HIM 1990-2015

The research deals with the experimental study of square spiral microstrip antennas over the 5 to 12 GHz range. Square spiral microstrip antennas can provide a wideband reception at frequencies of several gigaHertz. They can, like other microstrip antennas be made conformal and are compact and light weight. Consequently, they are very suitable for use on aircraft and spacecraft. These antennas can be flush mounted to the existing surfaces, and their shape makes them easier to fabricate, and can be mass-produced. The square spiral microstrip antenna is a recent development and has been investigated theoretically through the use of the …