Engineering Commons^™

N-Version Programming For The Detection Of Zero-Day Exploits, Lajos Nagy, Richard Ford, William Allen

Electrical Engineering and Computer Science Faculty Publications

Using N-Version programming techniques to increase software reliability is a well-explored field. In this paper, we extend the concept to the detection of new security vulnerabilities. Using our own N-Version arbiter, Judicare, we implement a simple auction web application, and demonstrate how our application is robust to the most common Web vulnerabilities as documented by OWASP. Finally, we discuss the implications of our results in the context of detection of Zero-Day attacks.

Transition From Unilamellar To Bilameller Vesicles Induced By An Amphiphilic Biopolymer, Jae-Ho Lee, Vivek Argarwal, Arijit Bose, Gregory F. Payne, Srinivasa R. Raghavan

Chemical, Biomolecular, and Materials Engineering Faculty Publications

We report some unusual structural transitions upon the addition of an amphiphilic biopolymer to unilamellar surfactant vesicles. The polymer is a hydrophobically modified chitosan and it embeds its hydrophobes in vesicle bilayers. We study vesicle-polymer mixtures using small-angle neutron scattering (SANS) and cryotransmission electron microscopy (cryo-TEM). When low amounts of the polymer are added to unilamellar vesicles of ca. 120 nm diameter, the vesicle size decreases by about 50%. Upon further addition of polymer, lamellar peaks are observed in the SANS spectra at high scattering vectors. We show that these spectra correspond to a co-existence of unilamellar and bilamellar vesicles. …

Thermally Developing Flow And Heat Transfer In Rectangular Microchannels Of Different Aspect Ratios, Poh-Seng Lee, S V. Garimella

CTRC Research Publications

Laminar convective heat transfer in the entrance region of microchannels of rectangular cross-section is investigated under circumferentially uniform wall temperature and axially uniform wall heat flux thermal boundary conditions. Three-dimensional numerical simulations were performed for laminar thermally developing flow in microchannels of different aspect ratios. Based on the temperature and heat flux distributions obtained, both the local and average Nusselt numbers are presented graphically as a function of the dimensionless axial distance and channel aspect ratio. Generalized correlations, useful for the design and optimization of microchannel heat sinks and other microfluidic devices, are proposed for predicting Nusselt numbers. The proposed …

Ccfss Technical Bulletin Spring 2006, Wei-Wen Yu Center For Cold-Formed Steel Structures

CCFSS Technical Bulletins (1993 - 2020)

No abstract provided.

Acuta Enews February 2006, Vol.35, No. 2

ACUTA Newsletters

ln This Issue

Nominate Now for 2006-07 Board of Directors

From the President:Volunteer and Grow......... Patricia Todus, Northwestern Univ., ACUTA President

Share Your Struggles?

Text Message Marketing Encounters the Law.............. William B. Baker, Wiley Rein & fielding

lnfo Links Randy Hayes, Univ. of Northern lowa

Tech Talk: Short Takes: Interconnects and That Pesky Skype ................ Kevin Tanzillo, Dux PR

Just for Fun: Predictions from the Past

Web Tip: ACUTA Quick Search................ Aaron Fuehrer, ACUTA lnformation Tech. Mgr.

lnstitutional Excellence Award Deadline

Thanks to Journal Advertisers for 2005

Board Report..................... Riny Ledgerwood, San Diego State Univ., ACUTA, Sec./Treasurer

DC Update..................... Whitney …

A 32-Mw 320-Mhz Continuous-Time Complex Delta-Sigma Adc For Multi-Mode Wireless-Lan Receivers, Jesus Arias, Peter Kiss, Vladimir Prodanov, Vito Boccuzzi, Mihai Banu, David Bisbal, Jacinto San Pablo, Luis Quintanilla, Juan Barbolla

Electrical Engineering

We present an experimental continuous-time complex delta-sigma multi-bit modulator, implemented in standard 0.25-μm CMOS technology and meeting all major requirements for application in IEEE 802.11a/b/g wireless LAN receivers. The clock frequency is 320 MHz, producing an oversampling ratio of 16 for 20 MHz channel bandwidths. The modulator supports two operation modes for zero-IF and low-IF receiver architectures respectively, requires a single 2.5-V power supply, and dissipates only 32 mW of power. The measured peak signal-to-noise ratio is 55 dB. Further experimental results using sine-wave and OFDM test signals are also presented

Images With Uncertainty: Efficient Algorithms For Shift, Rotation, Scaling, And Registration, And Their Applications To Geosciences, C. G. Schiek, Roberto Araiza, Jose M. Hurtado, A. A. Velazco, Vladik Kreinovich, V. Sinyanski

Departmental Technical Reports (CS)

In geosciences, we often need to combine two or images of the same area:

in data fusion, we must combine, e.g., data from satellite images with a radar image

in analyzing the effect of an earthquake, we must compare the before and after images, etc.

Compared images are often obtained from slightly different angles, from a slightly different position. Therefore, in order to compare these images, we must register them, i.e., find the shift, rotation, and scaling after which these images match the best, and then apply these transformations to the original images.

There exist efficient algorithms for registration and …

Ellipsoids And Ellipsoid-Shaped Fuzzy Sets As Natural Multi-Variate Generalization Of Intervals And Fuzzy Numbers: How To Elicit Them From Users, And How To Use Them In Data Processing, Vladik Kreinovich, Jan Beck, Hung T. Nguyen

Departmental Technical Reports (CS)

In this paper, we show that ellipsoids are natural multi-variate generalization of intervals and ellipsoid-shaped fuzzy sets are a natural generalization of fuzzy numbers. We explain how to elicit them from users, and how to use them in data processing.

Detecting Outliers Under Interval Uncertainty: A New Algorithm Based On Constraint Satisfaction, Evgeny Dantsin, Alexander Wolpert, Martine Ceberio, Gang Xiang, Vladik Kreinovich

Departmental Technical Reports (CS)

In many application areas, it is important to detect outliers. The traditional engineering approach to outlier detection is that we start with some "normal" values x1,...,xn, compute the sample average E, the sample standard deviation sigma, and then mark a value x as an outlier if x is outside the k0-sigma interval [E-k0*sigma,E+k0*sigma] (for some pre-selected parameter k0). In real life, we often have only interval ranges [xi-,xi+] for the normal values x1,...,xn. In this case, we only have intervals of possible values for the bounds L=E-k0*sigma and U=E+k0*sigma. We can therefore identify outliers as values that are outside all …

Collapse Of The Quebec Bridge, 1907, Cynthia Pearson, Norbert Delatte

Civil and Environmental Engineering Faculty Publications

In the late 19th century, the transportation needs of Quebec led to proposals for bridging the St. Lawrence River. The Quebec Bridge was the longest cantilever structure attempted until that time. In its final design, the clear span was 548.6 m (1,800 ft) long. The bridge project was financially troubled from the beginning. This caused many setbacks in the design and construction. Construction finally began in October 1900. In August 1907, the bridge collapsed suddenly. Seventy five workers were killed in the accident, and there were only 11 survivors from the workers on the span. A distinguished panel was assembled …

Ccfss News Spring 2006, Wei-Wen Yu Center For Cold-Formed Steel Structures

CCFSS Newsletters (1999 - 2008)

No abstract provided.

Discover Magazine - Cyborg Bacteria, Ravi F. Saraf, Vikas Berry

Department of Chemical and Biomolecular Engineering: News Releases

In a society that has goldplated everything from hubcaps to teeth, it was perhaps inevitable that someone would find a way to add some bling to bacteria.

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 22, Number 5, February 2006, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

A six page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.

Phase Distribution In An Upflow Monolith Reactor Using Computed Tomography, M. (Muthanna) H. Al-Dahhan, A. Kemoun, A. R. Cartolano

Chemical and Biochemical Engineering Faculty Research & Creative Works

Computed Tomography (CT) is Known to Be a Viable Technique for Determining Flow Maldistribution in Two-Phase Flow through Packed Beds. in This Study, Gamma Ray Computed Tomography Has Been Used to Quantify the Flow Distribution in a Monolith Catalytic Bed, with Water as the Liquid Phase and Air as the Gas Phase, Flowing Co-Currently Upward. the Flow Conditions Were Selected to Bracket Some Commercially Viable Operating Conditions for Such Reactors. in the Monolith Core Region, Fairly Uniform Flow Distribution Has Been Obtained for All the Flow Conditions Used. This Distribution is Quantified using the Standard Deviation of the Holdup Distribution. …

Value Of Research From 2000-2005: The Kentucky Spr Program For Highway Research, Donald L. Hartman

Kentucky Transportation Center Research Report

The abstracts of the 79 SPR reports completed by KTC researches for 2000-2005 were compiled. Seven projects were selected for value review to demonstrate the various types of benefits that accrue from SPR project research. This review compared objectives with results and described the nature of the benefits (some quantifiable). All of the projects were analyzed to determine: 1) the Kentucky Transportation Cabinet (and FHWA) goals supported and 2) the types of benefits that would reasonably be expected to accrue from implemented results of the research. Most of the 79 projects; results address both improving the performance of the Cabinet …

Supercritical-Carbon Dioxide-Assisted Cyclic Deposition Of Metal Oxide And Metal Thin Films, Dipak Barua, Theodosia Gougousi, Erin D. Young, Gregory N. Parsons

Chemical and Biochemical Engineering Faculty Research & Creative Works

Thin films of aluminum oxide and palladium were deposited on silicon at low temperatures (70-120 °C) by a cyclic adsorption/reaction processes using supercritical CO₂ solvent. Precursors included Al(hfac)₃, Al(acac)₃, and Pd(hfac)₂, and aqueous H₂O₂, tert-butyl peracetate, and H₂ were used as the oxidants or reductants. For the precursors studied, growth proceeds through a multilayer precursor adsorption in each deposition cycle, and film thickness increased linearly with the number of growth cycles.

Velocity Distribution Of Helium And Neon Atoms Released From Graphite And Tungsten Limiters In Textor, P. Lindner, M. Brix, Ph Mertens, A. Pospieszczyk, U. Samm, B. Schweer, B. Unterberg

Engineering Management and Systems Engineering Faculty Research & Creative Works

The release mechanisms of noble gases from plasma-facing components were observed spectroscopically in the TEXTOR plasma boundary by determining the velocity distribution from Doppler broadening. For the first time, three different mechanisms for helium and neon release from graphite and tungsten limiters could be distinguished quantitatively in a tokamak: thermal desorption, ion-induced desorption and particle reflection. Under the assumption that the thermal desorption follows a Maxwellian velocity distribution, the ion-induced desorption can be expressed by a Thompson velocity distribution. Calculating the particle reflection by the Monte-Carlo code TRIM, these processes could be separated in the measured velocity distribution. © 2005 …

Behavior Of Filament Winding Fiber Reinforced Polymer Structural Members, Mohamed Soliman Samy Aguib

Archived Theses and Dissertations

Fiber-reinforced polymeric (FRP) composites are being considered for structural members in construction as lighter, more durable alternatives to steel and concrete. Unlike steel and similar isotropic materials where mechanical properties are independent of the applied load directions composites are anisotropic materials by nature. Pultredud FRP structural members that are considered unidirectional members are subjected to premature failure due to discontinuity of fiber in the transverse and through the thickness of the members in a shape of delamination failure. Proposed box-section structural member by utilizing filament-winding process using· woven roving mats instead of roving strands to reorganize the fibers in produced …

Parallel Simulated Annealing For Scheduling Agile Manufacturing Systems, Ahmed Osama Abdulrahman

Archived Theses and Dissertations

The problem addressed in this research is the scheduling of an agile manufacturing system comprised of machining and assembly operations with the objective of minimizing the makespan. This problem has been addressed in the literature using heuristics and metaheuristics. In addition, a lower bound has been developed. This research builds upon the findings of the recent literature and proposes two enhanced algorithms, parallel simulated annealing and parallel modified simulated annealing, to solve the addressed problem. The performance of the developed algorithms is compared to that of another simulated annealing algorithm that is available in the literature. Performance comparisons are based …

A Study Of Parameters Affecting Displacement Ventilation, Alia Sameh Abdel Rahman

Archived Theses and Dissertations

This study is concerned with displacement ventilation. The concept of displacement ventilation is explained with an overview of its limitations and conditions for its application. In order to differentiate between displacement ventilation and dilution ventilation, a comparison of the various aspects of the two systems is conducted. The work reviews the literature found on some of the main aspects that need to be studied when designing a displacement ventilation system such as air flow, temperature distribution and other factors. In order to predict the temperature and flow distribution in a room, a CFD model is developed and presented. First a …

An Ontological Approach For Building A Pattern Language And A Pattern Language Management Tool, Reaham Osama Badr

Archived Theses and Dissertations

The Study of patterns and pattern inter relationships has become a recent issue tackled by many researchers. Although not many pattern languages exist yet, the importance of their existence is clearly noted. Authors argue that connecting related patterns using the relationships existing between them, gives them an additional value over individual patterns.

The main issues faced when dealing with pattern languages is how to build these languages and how to mange them afterwards. In this research work, an ontological approach is used to present a methodology for building a pattern language. This methodology is presented in the form of a …

Reputed Authenticated Routing For Ad Hoc Networks Protocol (Reputed-Aran), Abdalla Ahmed Fekry Mahmoud

Archived Theses and Dissertations

A mobile ad hoc network (MANET) is a spontaneous network that can be established with no fixed infrastructure. This means that all its nodes behave as routers and take part in its discovery and maintenance of routes to other nodes in the network. Its routing protocol has to be able to cope with the new challenges that a MANET creates such as nodes mobility, security maintenance, quality of service, limited bandwidth and limited power supply. These challenges set new demands on MANET routing protocols. With the increasing interest in MANETs, there has been a greater focus on the subject of …

Bs News

Building Services Engineering

No abstract provided.

Determinants Of Hearing Loss In Perforations Of The Tympanic Membrane, Ritvik P. Mehta, John J. Rosowski, Susan E. Voss, Ellen O'Neil, Saumil N. Merchant

Engineering: Faculty Publications

Background: Although tympanic membrane perforations are common, there have been few systematic studies of the structural features determining the magnitude of the resulting conductive hearing loss. Our recent experimental and modeling studies predicted that the conductive hearing loss will increase with increasing perforation size, be independent of perforation location (contrary to popular otologic belief), and increase with decreasing size of the middle-ear and mastoid air space (an idea new to otology).

Objective: To test our predictions regarding determinants of conductive hearing loss in tympanic membrane perforations against clinical data gathered from patients.

Study Design: Prospective clinical study. Setting: Tertiary …

Frontal Processes In The Columbia River Plume Area, David A. Jay, Jiayi Pan, Philip M. Orton, Alexander R. Horner-Devine

Civil and Environmental Engineering Faculty Publications and Presentations

Information about frontal processes in the Columbia River plume area. Topics include: phenomenology of CR plume fronts, plume responses, upwelling fronts & internal waves: the "Zipper", etc.

Analyzing Dynamic Characteristics Of Internal Solitons Generated At The Columbia River Plume Front With Sar Images, David A. Jay, Jiayi Pan, R. D. Brodeur

Civil and Environmental Engineering Faculty Publications and Presentations

The Columbia River plume transports dissolved and particulate load, phyto- and zooplankton,and larvae across the shelf. It also facilitates primary production and influences food-web structure through its supply of silicate and micronutrients. Small-scale phenomena such as plume fronts and internal waves generated by the plume can greatly affect vertical mixing between the plume and ocean waters. Internal waves that are generated at the front of the river plume and propagate off shoreward [Nash and Moum 2005; Orton and Jay 2005] both cause mixing and transport plume water into the adjacent coastal ocean. We use Synthetic Aperture Radar (SAR) images and …

Macroscopic Computational Model Of Dielectric Barrier Discharge Plasma Actuators, Timothy R. Klein

Theses and Dissertations

Recent progress in the generation and sustainment of gas discharges at atmospheric pressure has energized research in the field of plasma-aerodynamics. Plasma actuators are promising devices that achieve flow control with no moving parts, do not alter the airfoil shape and place no parts in the flow. The operation of a plasma actuator is examined using a macroscopic (force and power addition) computational fluid dynamic model of a dielectric barrier discharge, DBD, in Fluent. A parametric approach is adopted to survey the range of requisite magnitudes of momentum and energy delivered to the flow field and to identify the effects …

A Game Theory Approach To Constrained Minimax State Estimation, Daniel J. Simon

Electrical and Computer Engineering Faculty Publications

This paper presents a game theory approach to the constrained state estimation of linear discrete time dynamic systems. In the application of state estimators, there is often known model or signal information that is either ignored or dealt with heuristically. For example, constraints on the state values (which may be based on physical considerations) are often neglected because they do not easily fit into the structure of the state estimator. This paper develops a method for incorporating state equality constraints into a minimax state estimator. The algorithm is demonstrated on a simple vehicle tracking simulation.

Emotion-Mapped Robotic Facial Expressions Based On Philosophical Theories Of Vagueness, Phil Serchuk, Ehud Sharlin, Martin Lukac, Marek Perkowski

Electrical and Computer Engineering Faculty Publications and Presentations

As the field of robotics matures robots will need some method of displaying and modeling emotions. One way of doing this is to use a human-like face on which the robot can make facial expressions corresponding to its emotional state. Yet the connection between a robot s emotional state and its physical facial expression is not an obvious one: while a smile can gradually increase or decrease in size, there is no principled method of using boolean logic to map changes in facial expressions to changes in emotional states. We give a philosophical analysis of the problem and show that …

Detection Efficiencies And Generalized Breakdown Probabilities For Nanosecond-Gated Near Infrared Single-Photon Avalanche Photodiodes, David A. Ramirez, Majeed M. Hayat, Gauri Karve, Joe C. Campbell, Sergio N. Torres, Bahaa E.A. Saleh, Malvin Carl Teich

Electrical and Computer Engineering Faculty Research and Publications

A rigorous model is developed for determining single-photon quantum efficiency (SPQE) of single-photon avalanche photodiodes (SPADs) with simple or heterojunction multiplication regions. The analysis assumes nanosecond gated-mode operation of the SPADs and that band-to-band tunneling of carriers is the dominant source of dark current in the multiplication region. The model is then utilized to optimize the SPQE as a function of the applied voltage, for a given operating temperature and multiplication-region structure and material. The model can be applied to SPADs with In/sub 0.52/Al/sub 0.48/As or InP multiplication regions as well as In/sub 0.52/Al/sub 0.48/As--InP heterojunction multiplication regions for wavelengths …