Engineering Commons^™

Urban Stream Stabilization Using Regional Hydraulic Geometry Curves For Bankfull Floodplain Design, Jonathan Edward Fourrier

LSU Master's Theses

The objective of this thesis was to determine the effectiveness of hydraulic geometry curves for designing bankfull floodplains to stabilize urban streams. In stable streams bankfull discharge is contained within the stream's banks. Higher flows spread out onto the floodplain where the water's velocity drops due to the increase in area and vegetation. This dissipation of energy promotes sediment deposition, decreases flow velocity, and reduces channel erosion. In cases like Galbraith Drain where historical gage data are not available and bankfull indicators are not present, a degraded stream's bankfull depth may be estimated with hydraulic geometry curves. Over forty cross …

Pre-Treatment Of Dynamically Varying Waste Gas Concentrations Using Activated Carbon Prior To Biofiltration: Effect Of Cycle Length On Degree Of Load Equalization, Kodi L. Collins

LSU Master's Theses

Dynamically varying waste gas concentrations pose challenges to the operation and design of air pollution control techniques such as biofilters. Although design approaches are becoming well established for biofilters treating gases containing VOC concentrations that are constant as a function of time, many industrial processes emit gas streams contaminated with volatile organic compounds at concentrations that fluctuate with time. Application of an effective load equalization technique could eliminate some challenges associated with fluctuating pollutant concentrations. Recent research has demonstrated that granular activated carbon (GAC) can serve as a passively controlled system to provide load-equalization as a pre-treatment prior to biofiltration. …

Oblivious Transfer For Secure Communication, Abhishek Parakh

LSU Master's Theses

Over the past four decades, computational power and algorithmic strategies have advanced tremendously resulting in an enormous increase in the key sizes required for secure cryptosystems such as RSA. At the same time, the electronic devices have grown smaller and portable requiring algorithms running on them to be optimized in size and efficiency while providing security, at least, equivalent to that provided on a typical desktop computer. As a result, the industry is moving towards newer cryptosystems such as ECC and NTRU that are well suited for resource constrained environments. While, ECC claims to provide security equivalent to that of …

Functionalized Polymeric Membranes For Bioseparation And Biocatalysis, Saurav Datta

Theses and Dissertations--Chemical and Materials Engineering

Functionalized polymeric membrane based techniques are becoming increasingly popular in biotechnology, food and pharmaceutical industries due to their versatility and hydrodynamic benefits over traditional materials and methods. This research work has been directed towards the development of functionalized polymeric membranes, extensive experimental and theoretical analyses of some of the fundamental aspects of accessibility, membrane fouling and enzyme catalysis, and applications in affinity based bioseparation and biocatalysis. In this research work, the impact of different types of functionalization techniques, such as functionalization of different membrane materials, covalent and electrostatic immobilization, on interaction of various biomolecules and active sites in membrane has …

The Ibm Rational Unified Process For System Z, Cécile Péraire, Mike Edwards, Angelo Fernandes, Enrico Mancin, Kathy Carroll

Cécile Péraire

No abstract provided.

The Difficulty Factors Approach To The Design Of Lessons In Intelligent Tutor Curricula, Ryan Baker, Albert Corbett, Kenneth Koedinger

Ryan S.J.d. Baker

We present an approach to designing intelligent tutoring systems, termed the Difficulty Factors Approach. In this approach, the designer investigates, at each iteration of the design cycle, which skills and concepts are difficult for students, and what factors underlie those difficulties. We show that this approach complements existing design principles, producing data that helps designers apply principles in context. We also show that by continuing to investigate student difficulties throughout the design process, it is possible to discover difficulty factors initially obscured by other difficulty factors. We give an example of the application of the Difficulty Factors Approach in the …

The Case For Inductive Teaching, Michael Prince, R. Felder, R. Brent

Michael J. Prince

No abstract provided.

Coordinated Control Of Uavs And Reusable Launch Vehicles, Raúl Ordóñez

Raúl Ordóñez

PI, funded by AFRL/DAGSI, $536,739, year: 2004-2007.

Managing The Business Of Software Porduct Line: An Empirical Investigation Of Key Business Factors, Faheem Ahmed, Luiz Capretz

Luiz Fernando Capretz

Business has been highlighted as one of the critical dimensions of software product line engineering. This paper's main contribution is to increase the understanding of the influence of key business factors by showing empirically that they play an imperative role in managing successful software product line.

Optimisation Des Régimes De Fonctionnement D'Un Moteur Asynchrone À Cage Entrainant Une Charge Variable, Malika Louanchi

Boukhemis Chetate

L’objectif de ce travail est l’optimisation du régime de fonctionnement des moteurs asynchrones lorsqu’ils sont sou chargés en minimisant le courant statorique absorbé en régime établit. La minimisation du courant statorique est obtenue en faisant varier la tension d’alimentation. Nous avons initialement procédé à la description et à la modélisation du moteur asynchrone, et à partir d’un schéma équivalent du moteur nous avons établit la relation liant le courant statorique minimal à la tension qui lui correspond. Pour la variation de la tension d’alimentation nous avons opté pour un gradateur triphasé à thyristors et pour un onduleur de tension à …

Using Flossmole Data In Determining Business Readiness Ratings, Tony Wasserman, Ashutosh Das

Tony Wasserman

This paper is a preliminary report on using FLOSSmole data retrieved from open source repositories (forges) to calculate Business Readiness Rating scores.

Epa Technology Programs: Engaging The Marketplace, Joann S. Lighty

JoAnn S. Lighty

Enhancing Design Learning Using Groupware, Andrew Wodehouse, Ozgur Eris, Hillary Grierson, Ade Mabogunje

Ozgur Eris

Project work is increasingly used to help engineering students integrate, apply and expand on knowledge gained from theoretical classes in their curriculum and expose students to `real world' tasks. To help facilitate this process, the department of Design, Manufacture and Engineering Management at the University of Strathclyde has developed a web-based groupware product called LauLima to help students store, share, structure and apply information when they are working in design teams. This paper describes a distributed design project class in which LauLima has been deployed in accordance with a Design Knowledge Framework that describes how design knowledge is generated and …

Mechanochemical Mechanism For Fast Reaction Of Metastable Intermolecular Composites Based On Dispersion Of Liquid Metal, Valery I. Levitas, Blaine W. Asay, Steven F. Son, Michelle Pantoya

Steven F. Son

An unexpected mechanism for fast reaction of Alnanoparticles covered by a thin oxide shell during fast heating is proposed and justified theoretically and experimentally. For nanoparticles, the melting of Al occurs before the oxide fracture. The volume change due to melting induces pressures of 1–2 GPa and causes dynamic spallation of the shell. The unbalanced pressure between the Al core and the exposed surface creates an unloading wave with high tensile pressures resulting in dispersion of atomic scale liquid Al clusters. These clusters fly at high velocity and their reaction is not limited by diffusion (this is the opposite of …

Methods And Tools For Developing Interactive Information Systems: An Historical Perspective, Tony Wasserman

Tony Wasserman

This paper describes the evolution of hardware and software technology over the past three decades, focusing on approaches for building interactive information systems and web applications. Successive generations of technology have used advances in hardware and software technology, along with increasingly sophisticated development methods and tools, to reduce development times and to produce a better user experience. After describing the key technology characteristics of each generation, this paper also describes the evolution of a specific methodology, User Software Engineering, from its origins in the 1970’s to its applicability to the development of modern applications.

Track-To-Track Association Using Attributes, Yaakov Bar-Shalom, Huimin Chen

Huimin Chen

No abstract provided.

3d-Mapping Optimization Of Embodied Energy Of Transportation, Joshua M. Pearce, Sara J. Johnson, Gabriel B. Grant

Joshua M. Pearce

Thermodynamic Calculations Using A Simulated Annealing Optimization Algorithm, Adrian Bonilla-Petriciolet, Juan Gabriel Segovia-Hernández, Florianne Castillo-Borja, Ulises I. Bravo-Sánchez

Adrian Bonilla-Petriciolet

On-Chip Implementation Of High Speed And High Resolution Pipeline Radix 2 Fft Algorithm, Rozita Teymourzadeh, Masuri Othman

Dr. Rozita Teymourzadeh, CEng.

Vlsi Implementation Of High Speed And High Resolution Fft Algorithm Based On Radix 2 For Dsp Application, Nooshin Mahdavi, Rozita Teymourzadeh, Masuri Othman

Dr. Rozita Teymourzadeh, CEng.

Condiciones De Frontera Para El Transporte Entre Medios Multifásicos, Francisco J. Valdes-Parada

Francisco J. Valdes-Parada

Las condiciones de frontera adecuadas, ya sea de transferencia de cantidad de movimiento, calor o masa, entre dos regiones es un elemento indispensable en el desarrollo de modelos que describan el transporte en sistemas heterogéneos. Por tal razón, es común encontrar en la literatura condiciones de frontera que, si bien pueden ser adecuadas para describir un fenómeno particular, se obtuvieron empíricamente y frecuentemente incluyen coeficientes desconocidos.

Lo anterior ha despertado el interés de varios autores que, en las tres últimas décadas, han presentado metodologías que permiten obtener condiciones de frontera fundamentadas en la física del fenómeno estudiado. Entre las distintas …

Controlled Language: The Next Big Thing In Translation?, Uwe Muegge

Uwe Muegge

Many global organizations are beginning to see the productivity indicators for their translation and localization processes reach a plateau. That’s an inevitable fact even for those organizations that use what’s currently billed as the latest and greatest in translation technology, such as translation memory with automated workflow components or globalization management systems. Even with these tools in place, making content available in multiple languages remains a very expensive and time-consuming proposition. For those looking for ways to reduce the cost of translation to the point where almost all materials that should be translation actually can be translated, controlled language may …

Structure Analysis Of Nanocrystalline Mgo Aerogel Prepared By Sol-Gel Method, G. Dercz, L. Pajak, K. Prusik, R Pielaszek, Janusz J. Malinowski, Wojciech Pudło

Janusz J. Malinowski

Towards Web Services Oriented Unified Supervisory Hci, Djilali Idoughi, Christophe Kolski

Professor Djilali IDOUGHI

A lot of work & research has been done in HCI supervision-type industrial context, but mostly relative to control rooms and local supervision. However, many multi-site or extended and complex organisations are faced with some new challenges and trends such as supervisory systems integration and unified access of the different actors which have not been much considered so far. A service oriented solution is outlined and explained in the context of industrial supervision oriented towards to a unified and integrated supervisory HCI design. A representative supervisory scenario taken from a real case study which illustrates the approach is then described.

Thermodynamic Calculations For Chemical Engineering Using A Simulated Annealing Optimization Method, Adrian Bonilla-Petriciolet, Juan Gabriel Segovia-Hernández, Florianne Castillo-Borja, Ulises I. Bravo-Sánchez

Adrian Bonilla-Petriciolet

In this paper, a memory-based Simulated Annealing is proposed to solve several thermodynamic calculations that are related to the modeling of phase equilibrium and thermodynamic properties. Specifically, we have tested the numerical performance of this optimization method in Gibbs energy minimization for flash calculations, calculation of homogeneous azeotropes and data fitting in thermodynamic models. Our results indicate that, in general, proposed method is reliable to solve these problems and shows a reasonable computational effort.

A Busy-Tone Based Mac Scheme For Wireless Ad Hoc Networks Using Directional Antennas, Hong-Ning Dai, Kam-Wing Ng, Min-You Wu

Hong-Ning Dai

Applying directional antennas in wireless ad hoc networks offers numerous benefits, such as extended communication range, increased spatial reuse, improved capacity and suppressed interference. However, directional antennas can cause new location-dependent carrier sensing problems, such as new hidden terminal and deafness problems, which can cause severe penalties to the performance. Recently, a few schemes have been proposed to tackle these problems. However, these methods can provide limited solutions on the hidden terminal and deafness problems. We propose a new MAC protocol, termed the busy-tone based directional medium access control (BT-DMAC) protocol. When the transmission is in progress, the sender and …

Planning To Reach For An Object Changes How The Reacher Perceives It., Peter Vishton, N J. Stephens, L A. Nelson, S E. Morra, Kaitlyn L. Brunick, Jennifer A. Stevens

Peter Vishton

A Novel Quasi-Resonant Snubber-Assisted Zcs-Pwm Dc-Dc Converter With High Frequency Link, Khairy F. A. Sayed Dr

Khairy F. A. Sayed Dr

In this paper, a novel type of auxiliary switched capacitor assisted edge resonant soft switching PWM resonant DC-DC Converter with two simple auxiliary commutation lossless inductor snubbers. The operation principle of this converter is described using the switching mode equivalent circuits. This newly developed multi resonant DC-DC Converter can regulate its dc output AC power under a principle of constant frequency edge-resonant soft switching commutation by asymmetrical PWM duty cycle control scheme. The high frequency power regulation and actual power characteristics of the proposed soft switching PWM resonant DC-DC Converter are evaluated and discussed. The operating performances of the newly …

Game Design As A Writing Course In The Liberal Arts., Amber Settle, Robin Burke, Lucia Dettori

Amber Settle

Computing Branches Out: On Revitalizing Computing Education., Ljubomir Perkovic, Amber Settle

Amber Settle

No abstract provided.