Engineering Commons^™

Reputation-Based Internet Protocol Security: A Multilayer Security Framework For Mobil Ad Hoc Networks, Timothy H. Lacey

Theses and Dissertations

This research effort examines the theory, application, and results for a Reputation-based Internet Protocol Security (RIPSec) framework that provides security for an ad-hoc network operating in a hostile environment. In RIPSec, protection from external threats is provided in the form of encrypted communication links and encryption-wrapped nodes while internal threats are mitigated by behavior grading that assigns reputations to nodes based on their demonstrated participation in the routing process. Network availability is provided by behavior grading and round-robin multipath routing. If a node behaves faithfully, it earns a positive reputation over time. If a node misbehaves (for any number of …

Applying Image Matching To Video Analysis, Adam J. Behring

Theses and Dissertations

Dealing with the volume of multimedia collected on a daily basis for intelligence gathering and digital forensics investigations requires significant manual analysis. A component of this problem is that a video may be reanalyzed that has already been analyzed. Identifying duplicate video sequences is difficult due to differences in videos of varying quality and size. This research uses a kd-tree structure to increase image matching speed. Keypoints are generated and added to a kd-tree of a large dimensionality (128 dimensions). All of the keypoints for the set of images are used to construct a global kd-tree, which allows nearest neighbor …

Analysis Of Alternative Methods For Long-Term Wind Speed And Initial Site Assessment For Purposes Of Wind Energy Production Estimation, Ryan Mcdevitt

Theses and Dissertations

A need exists for identification and evaluation of viable sites for wind energy. However, this is made difficult by the site-specific nature of the wind. A review of current industry practices shows that linear regression is the preferred method, although little work has been done to investigate alternative approaches. To address this, various methods were tested on 23 target sites with data measured over a long-term period. Each site was analyzed with the chosen best reference station, across 10 data periods for each method with results classified as mean absolute percentage error in energy density between the projected and measured …

Validation Of Geographically Based Surface Interpolation Methods For Adjusting Construction Cost Estimates By Project Location, Su Zhang

Civil Engineering ETDs

In the construction industry, cost estimates are fundamental to the success of a construction project. Location factors are commonly used to adjust cost estimates by project location. However, not all locations have corresponding factors. Nowadays, the construction industry has employed a simple, proximity-based location factor interpolation method which is widely accepted and used. Under this method, for a location without adjustment factor, the factor of the geographically “nearest neighbor” will be selected. Although this approach was statistically substantiated by former research, it was still not sufficiently supported, considering that only one year’s RSMeans City Cost Index (CCI) dataset was tested. …

A Day In The Life Of A Float Plane Charter Pilot, Bryan Cox

ERAU Prescott Aviation History Program

Ever taken a float plane trip or wanted to? Learn what it’s like to be a float plane pilot doing charter work in the Puget Sound area of Washington state. Hear this light-heated, informal, presentation by someone who has done all this for “fun and profit”!

Programmable Periodicity Of Quantum Dot Arrays With Dna Origami Nanotubes, Hieu Bui, Craig Onodera, Carson Kidwell, Yerpeng Tan, Elton Graugnard, Wan Kuang, Jeunghoon Lee, William B. Knowlton, Bernard Yurke, William L. Hughes

Materials Science and Engineering Faculty Publications and Presentations

To fabricate quantum dot arrays with programmable periodicity, functionalized DNA origami nanotubes were developed. Selected DNA staple strands were biotin-labeled to form periodic binding sites for streptavidin-conjugated quantum dots. Successful formation of arrays with periods of 43 and 71 nm demonstrates precise, programmable, large-scale nanoparticle patterning; however, limitations in array periodicity were also observed. Statistical analysis of AFM images revealed evidence for steric hindrance or site bridging that limited the minimum array periodicity.

2010 Fall Engr333 Project Assignment, Matthew K. Heun

ENGR 333

The Fall 2010 ENGR333 project focused on heating and air-conditioning in campus dormitories, which are notoriously leaky and inefficient.

I asked the students “What would it take to retrofit the Bolt-Heyns-Timmer (BHT) dormitory heating and air-conditioning systems in a manner that achieves LEED certification?”

Customer

The customer for this project was Calvin’s VP for finance Henry DeVries.

The Application Of Multi Frequency Resonant Controllers In In A Dfig To Improve Performance By Reducing Unwanted Power And Torque Pulsations And Reducing Current Harmonics., Joseph Kearney, Michael Conlon, Eugene Coyle

Conference papers

The paper describes a method to control the rotor-side and grid side converters in a DFIG when subjected to the effects of network voltage unbalance conditions. Multi Frequency Resonant Controllers are incorporated into the grid side and rotor side converters to assist in the control functions. The Resonant Controllers are tuned to twice the network frequency to assist in the control of power and torque pulsations and to three times the network frequency to assist in the control of the generated third harmonic currents. A DFIG model is implemented in Matlab/Simulink and simulations show the reduction in power and torque …

S^3 Research: Wheelchair Trainer, Shawn Wright, Christopher Pung, John Farris

Student Summer Scholars Manuscripts

The purpose of this project was to create a device to allow children with severe handicaps to learn how to use a powered wheelchair. Lincoln Developmental Center is a school for children with handicaps that contracted the School of Engineering to build this device. These children can benefit from a powered wheelchair, but require additional practice to learn how to use one. This device is essentially a moving platform. The user’s wheelchair is rolled onto it and secured. The user has control over the platform with a similar joystick to a powered wheelchair’s control.The scope of this project included two …

The Application Of Multi Frequency Resonant Controllers In In A Dfig To Improve Performance By Reducing Unwanted Power And Torque Pulsations And Reducing Current Harmonics., Joseph Kearney, Michael Conlon, Eugene Coyle

Conference papers

The paper describes a method to control the rotor-side and grid side converters in a DFIG when subjected to the effects of network voltage unbalance conditions. Multi Frequency Resonant Controllers are incorporated into the grid side and rotor side converters to assist in the control functions. The Resonant Controllers are tuned to twice the network frequency to assist in the control of power and torque pulsations and to three times the network frequency to assist in the control of the generated third harmonic currents. A DFIG model is implemented in Matlab/Simulink and simulations show the reduction in power and torque …

Evidence Based Evaluation Research In Engineering, Kevin Kelly

Conference papers

An argument for evidence based evaluation of sustainable engineering projects in buildings

Peat Improvement Under Vacuum Preloading:A Novel Approach For Bog Roads In Ireland, Juan Pablo Osorio, Eric R. Farrell, Brendan C. O'Kelly

Conference papers

This paper presents the preliminary findings of a TCD/NRA vacuum preloading field trial that is part of a research project into the construction options for improving rampart roads. Vacuum preloading is a construction method used to accelerate settlement and the increase shear strength by applying a vacuum pressure to the ground by means of prefabricated vertical drains, an impervious tight sheet and a vacuum pump. Consolidating the ground by applying a vacuum load has several advantages over other techniques, for example; no fill material is required; construction periods are generally shorter; and there is no need for chemical admixtures. This …

Exploring Cost-Effective, High Performance Residential Retrofits For Affordable Housing In The Hot Humid Climate, Florida Solar Energy Center, Janet Mcilvaine

FSEC Energy Research Center®

In 2009, a Department of Energy Building America team led by the Florida Solar Energy Center began working with partners to find cost-effective paths for improving the energy performance of existing homes in the hot humid climate. A test-in energy audit and energy use modeling of the partner's proposed renovation package was performed for 41 affordable and middle income foreclosed homes in Florida and Alabama. HERS1 Indices ranged from 92 to 184 with modeled energy savings ranging from 3% to 50% (average of 26%). Analyses and recommendations were discussed with partners to encourage more efficient retrofits, highlight health and safety …

Defect Detection Microscopy, Stuart Craig Rogers

Theses and Dissertations

The automotive industry's search for stronger lighter materials has been hampered in its desire to make greater use of Magnesium alloys by their poor formability below 150°C. One current challenge is to identify the complex structure and deformation mechanisms at work and determine which of these are primary contributors to the nucleation of defects. Orientation Imaging Microscopy has been the most accessible tool for microstructural analysis over the past 15 years. However, using OIM to analyze defect nucleation sites requires prior knowledge of where the defects will occur because once the defects nucleate the majority of microstructural information is destroyed. …

Subcritical Contraction For Improved Open-Channel Flow Measurement Accuracy With An Upward-Looking Advm, Daniel Howes, Charles M. Burt, Brett F. Sanders

BioResource and Agricultural Engineering

Acoustic Doppler velocity meters (ADVMs) provide an alternative to more traditional flow measurement devices and procedures such as flumes, weirs, and stage rating for irrigation and drainage canals. However, the requirements for correct calibration are extensive and complex. A three-dimensional computational fluid dynamics (CFD) model was used to design a subcritical rapidly varied flow contraction that provides a consistent linear relationship between the upward-looking ADVM sample velocity and the cross-sectional average velocity in order to improve ADVM accuracy without the need for in situ calibration. CFD simulations validated the subcritical contraction in a rectangular and trapezoidal cross section by showing …

One For All: Nine East Bay Communities Band Together To Get Energized, Tim Faulhnel, The Bay News

East Bay Energy Consortium Documents

No abstract provided.

Acuta Enews September 2010, Vol 39, No. 9

ACUTA Newsletters

ln This lssue

Survey Paints a Picture of Technology on Campus

From ACUTA Headquarters: Net Neutrality Heats Up........... Jeri A. Semer, CAE, Executive Dir.

Tech Talk: Let There Be Light......... Kevin Tanzillo, Dux PR

Nominations Open for 2011 ACUTA Institutional Excellence Awards

FYI: Useful Information from the Campus.......... Courtesy of Eric Weil, Student Monitor

Webinar: Overcoming Implementation Challenges with DAS at TAMU

Here's How We Collaborate

Learn More about WiFi, FMC, Green IT, and More from Your Desktop

Info Links......... Randy Hayes, Univ. of Northern Iowa

In Memory

"What Ifs..."........... Gary Audin, Delphi, Inc.

Thanks to Exhibitors and Sponsors at …

Development Of A New Marine Exposure Site On The Atlantic North-West Coast Of Ireland, Niall Holmes, L. Basheer, S. Nanukuttan, S. Srinivasan, Pam Basheer, J. Mccarter, M. Chrisp

Conference papers

This paper presents a new marine exposure site being developed on the North-west Atlantic coastline of Ireland in Co. Donegal by the Centre for Built Environment Research at Queen’s University Belfast. The site will initially contain a number of large precast concrete stems, each 1.5m high, 1.5m wide and 1m thick placed on concrete plinths poured in-situ. The concrete stems will be placed at three levels to achieve different exposure conditions outlined in EN 206, namely atmospheric (XS1), a splash or spray zone (XS3) and a tidal zone (XS3) where the stems will be submerged by the incoming tide twice …

A Tutorial On Functional Program Verification, Yoonsik Cheon, Melisa Vela

Departmental Technical Reports (CS)

This document gives a quick tutorial introduction to a functional program verification. In the functional program verification, a program is viewed as a mathematical function from one program state to another, and proving its correctness is essentially comparing two mathematical functions, the function computed by the program and the specification of the program, called an intended function. The reader is assumed to have some programming experience and to be familiar with such mathematical concepts as sets and functions.

From Interval And Probabilistic Granules To Granules Of Higher Order, Vladik Kreinovich

Departmental Technical Reports (CS)

Constructive mathematics, mathematics in which the existence of an object means that that we can actually construct this object, started as a heavily restricted version of mathematics, a version in which many commonly used mathematical techniques (like the Law of Excluded Middle) were forbidden to maintain constructivity. Eventually, it turned out that not only constructive mathematics is not a weakened version of the classical one -- as it was originally perceived -- but that, vice versa, classical mathematics can be viewed as a particular (thus, weaker) case of the constructive one. Crucial results in this direction were obtained by M. …

Visualization To Support The Discovery Of Prosodic Contours Related To Turn-Taking, Nigel Ward, Joshua L. Mccartney

Departmental Technical Reports (CS)

Some meaningful prosodic patterns can be usefully represented with pitch contours, however the development of such descriptions is a labor-intensive process. To assist in the discovery of contours, visualization tools may be helpful. Edlund et al. (2009) presented the idea of superimposing hundreds of pitch curves from a corpus as a way to see the overall patterns. In this paper we refine and extend this method and illustrate its utility in the discovery of a prosodic cue to back-channels in Chinese. We also discuss issues in relating a contour-based description to one in terms of a conjunction of features, and …

Commercial Sand Media Filter Tank Criteria For Energy Efficiency - Agricultural Drip Irrigation, Charles M. Burt

BioResource and Agricultural Engineering

Sand media filters are commonly used in agricultural drip irrigation systems. They have the advantages of simplicity and large capacities, and are favored by many farmers and designers over other filtration hardware. The primary justification for the research described in this report was to determine if it is possible and reasonable to use lower-than-accepted backflush pressures and thereby reduce the total pressure requirement for drip systems.

Design Of A Low-Cost Underwater Acoustic Modem, Bridget Benson, Ying Li, Brian Faunce, Kenneth Domond, Don Kimball, Curt Schurgers, Ryan Kastner

Electrical Engineering

There has been an increasing interest in creating short-range, low data rate, underwater wireless sensor networks for scientific marine exploration and monitoring. However, the lack of an inexpensive, underwater acoustic modem is preventing the proliferation of these sensor networks. Thus, we are building an underwater acoustic modem starting with the most critical component from a cost perspective-the transducer. The design substitutes a commercial transducer with a homemade transducer using cheap piezoceramic material and builds the rest of the modem's components around the properties of the transducer to extract as much performance as possible. This letter describes the high level design, …

Reducing Whole Body Vibration Levels In Off-Road, Heavy-Duty Vehicles: A Case Study With Computer Modelling, Shaun Mcfadden, Matthieu Morhan, Brian Hurley

Conference Papers

This paper describes a case study involving the dynamic ride performance of a 30-ton, articulated dumper vehicle. The vehicle in question was originally fitted with a front-end, solid axle with leading arm mechanism. After an engineering design program, the vehicle was custom-fitted with a Timoney Independent suspension system. Extensive testing and modelling activities using LMS Virtual.lab Motion® were undertaken to determine the productivity levels of each vehicle. It was demonstrated that the vehicle fitted with a Timoney suspension could achieve a productivity increase of up to 50%. A health analysis is also presented which shows the Timoney Independent suspension system …

A Software Application For The Selection Of Temperature Measuring Sensors Using The Analytic Hierarchy Process (Ahp), Shadi Mohammad Al-B'Ool

Systems Science and Industrial Engineering Student Scholarship

This study presents a computer program that applies analytic hierarchy process (AHP) method to objectively select the best temperature sensors for various applications from multiple nominated alternatives. The underlying decision method based on AHP methodology, ranks temperature sensors with different features with a score resulting from the synthesis of relative preferences of each alternative to the others at different levels considering independent evaluation criteria. At each level, relative preferences of each candidate alternative with respect to the upper immediate level are calculated from pair-wise comparisons among the candidate alternative sensors based on the specifications of sensors with respect to a …

2,2′,5,5′-Tetra­Chloro­Benzidine, Onome Ugono, Marcel Douglas Jr, Nigam P. Rath, Alicia M. Beatty

Educator Preparation & Leadership Faculty Works

No abstract provided.

Use Of An Integrated System Dynamics Model For Analyzing Behaviour Of The Social-Economic-Climatic System In Policy Development, Christopher J. Popovich, Slobodan P. Simonovic, Gordon A. Mcbean

Water Resources Research Report

Climate change remains one of the most critical issues that humans and the natural world face today. Yet while a strong body of scientific research has identified the risks if mitigation and adaptation measures are not taken, there still remains a policy lag. This leads researchers to pose several questions: is there an identified need by the policy domain for more or different science? Is the science that is conducted made policyrelevant? If not, are there tools to better link science to policy? This report will explain the process of science-policy communication related to the development of an integrated system …

Computing Standard-Deviation-To-Mean And Variance-To-Mean Ratios Under Interval Uncertainty Is Np-Hard, Sio-Long Lo

Departmental Technical Reports (CS)

Once we have a collection of values x1, ..., ,xn corresponding a class of objects, a usual way to decide whether a new object with the value x of the corresponding property belongs to this class is to check whether the value x belongs to interval [E - k0 * s, E + k0 * s], where E = (1/n) * (x1 + ... + xn) is the sample mean, V = s^2 = (1/n) * ((x1 - E)^2 + ... + (xn - E)^2) is the sample variance, and the parameter k0 is determined by the degree of confidence …

Chemical Changes In Soil And Soil Solution After Calcium Silicate Addition To A Northern Hardwood Forest, Youngil Cho, Charles T. Driscoll, Chris E. Johnson, Thomas G. Siccama

Civil and Environmental Engineering - All Scholarship

Liming has been used to mitigate effects of acidic deposition in forest ecosystems. This study was designed to examine the effects of calcium (Ca) supply on the spatial patterns and the relations between soil and soil solution chemistry in a base-poor forest watershed. Watershed 1 at the Hubbard Brook Experimental Forest in New Hampshire, USA was experimentally treated with wollastonite (CaSiO₃) in October, 1999. Exchangeable Ca (Ex-Ca), soil pH_s (in 0.01 M CaCl₂), effective cation exchange capacity (CEC_e), and effective base saturation (BS_e) increased, while exchangeable acidity (Ex-Acid) decreased …

Earth Systems Lesson Plan: Size And Forces Of The Solar System, Getaway Special Team 2010

Education and Outreach

No abstract provided.