Engineering Commons^™

Non-Linear Kinematic Hardening Model For Multiaxial Cyclic Plasticity, Marcio Costa Araujo

LSU Master's Theses

A model of kinematic work hardening based on Frederick and Armstrong (1966), Phillips and Weng (1975), Chaboche (1979), and Voyiadjis and Basuroychowdhury (1998) is proposed for metal like behavior materials. In this proposed model, ratcheting is taken into account through the observation of the backstress evolution equation, modified by the addition of a new term, . Experimental observations made by Phillips and Lee (1979) showed that the direction of the movement of the center of the yield surface occurs in between the stress rate tensor and the plastic strain rate tensor directions. The new term, added to Chaboche model (1979), …

Prediction Of Heat Transfer & Flow In Rotating Two-Pass Channels Connected By Holes., Achintya Kumar Pramanick

LSU Master's Theses

A computational study of the effect of rotation on the velocity and thermal field for a two-pass channel connected by rows of holes on the divider wall has been conducted. Detailed velocity and Nusselt number distributions are presented inside the rotating two-pass coolant channel. The enhanced cooling in this passage design is achieved by a combination of impingement and crossflow-induced swirl. The cross flow is generated from one coolant passage to the adjoining coolant passage through a series holes placed along the dividing wall. The holes deliver the flow from one passage to another typically achieved in a conventional design …

Polyurethane Foam Based Packing Media For Biofilters Removing Volatile Organic Compounds From Contaminated Air, Felipe A. Martinez

LSU Master's Theses

In recent years, biofiltration technology has gained acceptance worldwide as an economical and reliable air pollution control technology for treating gases contaminated by low concentrations of biodegradable volatile organic compounds (VOCs). Important applications include control of odors generated by wastewater treatment plants and control of VOC emissions from industrial sources. Although there have been many successful applications, several operational problems have been reported in the literature. These include difficulty in control over bed moisture content, high head loss caused by excessive biomass production, and inability to maintain removal efficiency during transient periods of high concentration loading. Use of a superior …

Electrodeposition Of Niw Alloys Into Deep Recesses, Lakshmikanth Namburi

LSU Master's Theses

Pulse electrodeposition has been investigated as a general technique for the electrodeposition of nickel-tungsten alloys in deep recesses for MEMS. Ni-W exhibits an induced codeposition mechanism, where the Ni reaction rate enhances the codeposition of W. Electrodeposition of this alloy has been achieved into recesses of 500 micron deep. The challenges that have been encountered are those related to gas evolving side reactions, local pH rises, diffusional limitations of the soluble species and long times required for filling the recesses. Electrodeposition on cylinder electrodes at different rotation rates was also carried out in order to obtain data on composition of …

Multiple-Access Interference Suppression In Cdma Wireless Systems, Jianqiang He

LSU Master's Theses

This thesis presents techniques that suppress the multiple access interference (MAI) in CDMA wireless systems. MAI is the main factor that influences the communication quality and the capacity in CDMA wireless systems. Hence the suppression of MAI is essential to the performance of a CDMA wireless system. For conventional CDMA systems where matched filters are used as receivers, the only MAI suppression method available is the power control, which allocates each user in the system an appropriate transmitter power level such that the transmitter power is minimized to decrease the MAI, while at the same time each user maintains a …

Dynamic Scheduling, Allocation, And Compaction Scheme For Real-Time Tasks On Fpgas, Shobharani Tatineni

LSU Master's Theses

Run-time reconfiguration (RTR) is a method of computing on reconfigurable logic, typically FPGAs, changing hardware configurations from phase to phase of a computation at run-time. Recent research has expanded from a focus on a single application at a time to encompass a view of the reconfigurable logic as a resource shared among multiple applications or users. In real-time system design, task deadlines play an important role. Real-time multi-tasking systems not only need to support sharing of the resources in space, but also need to guarantee execution of the tasks. At the operating system level, sharing logic gates, wires, and I/O …

Simulation Study And Instability Of Adaptive Control, Zhongshan Wu

LSU Master's Theses

The Minimum-degree Pole Placement algorithm for Self-tuning Regulator design and the Recursive Least-square method and the projection algorithm for plant estimation are studied first in this thesis. Simulation studies for the estimator and controller algorithms are mainly undertaken after describing how to use MATLAB S-function in detail. Not only do Simulation experiments illustrates how and how well the MDPP and RLS algorithms work, but also show how to write and debug MATLAB codes for S-function programs. The robustness of the adaptive control system is intensively discussed subsequently. By using an estimator resistant to the noise contamination, the adaptive control system …

Heavy Metal Distribution For Aqueous And Solid Phases In Urban Runoff, Snowmelt And Soils, Donald W. Glenn Iii

LSU Doctoral Dissertations

At the start of the third millennium, over 50% of the world’s population lives in urban areas. Anthropogenic activities associated with urban development such as traffic generate significant particulate and heavy metal mass loadings. Ten urban highway sites located throughout the metropolitan area of Cincinnati, Ohio were studied. Storm water, snow and transportation land use soil/residual complexes (RSCs) were collected at each site. For the storm water, results are presented for a series of eight rainfall runoff events over a two-year period and included analyses between dissolved and particulate-bound fractions of heavy metals (Pb, Cu, Cd and Zn), and water …

Design Of A Fluoride Removal Water Treatment System For A Guatemalan Community: An Exercise In Global Engineering, Jason R. El Koubi

Honors Capstones

No abstract provided.

Constitutive Modeling Of Cohesionless Granular Materials Using Disturbed State Concept., Prasad Madhava Samarajiva

LSU Historical Dissertations and Theses

No abstract provided.

Gate Transient Equations For Digital Bicmos Circuits, Beshara Elmufdi

Honors Capstones

No abstract provided.

Avoiding User Discomfort By Considering Paging Activity On The Workstations To Be Used By A Distributed Progam, Khalid Dawood Al-Dajani

Honors Capstones

No abstract provided.

Extensive Study Of The Pvc Industry: Relation Of The Processing Time And Processing Temperature To The Degree Of Fusion, As Well As A Strategic Plan For Increasing Consumer Demand, Erick Jason Comeaux

Honors Capstones

No abstract provided.

Testreview 1.0: User’S Manual, John Chituanya Okoli

Honors Capstones

No abstract provided.

Cone Penetration In Cemented Deposits-A Field Study, Semih Arslan

LSU Historical Dissertations and Theses

Neglecting cementation results in an underestimation of slope stability and pile capacity in design and analysis of geotechnical engineering problems related to cemented deposits. Developing methods to identify and assess the engineering characteristics of cemented deposits is an important subject in geotechnical engineering.

This study is conducted to evaluate the reliability of the prediction schemes proposed by previous investigators through a field study of cone penetration in a cemented deposit and respective laboratory triaxial study on undisturbed cemented specimens. The effect of cementation on cone penetration resistance is investigated through the field study, and the effects of cementation on drained …

Investigation Of Flow Patterns In Various Wastewater Treatment Facilities, Thomas Joseph Martin Jr

LSU Historical Dissertations and Theses

The theoretical hydraulic retention time of wastewater treatment plants is often used to predict the efficiency of treatment and to calculate operational parameters. However, these values are related to the actual hydraulic retention time. When there is a large discrepancy between the actual and predicted values, the actual hydraulic retention time can be determined by marking a parcel of wastewater and recording its passage through the system. This investigation utilized rhodamine WT, a fluorescent dye, to track the movement of wastewater through a stabilization lagoon and a rock-reed filter. The loss of rhodamine WT to sorption, biodegradation and photodegradation was …

The Effect Of Composition On Heat Transfer Coefficients For Condensing Binary Vapors With A Single Liquid Phase., James Berwick Todd

LSU Historical Dissertations and Theses

No abstract provided.

The Equilibrium Distribution Of Moisture Between Freon-12 And Selected Commercial Desiccants., Arnold Jarvis Gully

LSU Historical Dissertations and Theses

No abstract provided.

Comparative Refining Methods Of A Cane Sugar Solution., Pramod Lal Sarma

LSU Historical Dissertations and Theses

No abstract provided.

A Visual Investigation Of The Appearance Of Turbulence In Annular Spaces., Thomas Anderson Feazel

LSU Historical Dissertations and Theses

No abstract provided.

A Fluidization Process For Making Sodium Sulphate From Sodium Chloride., Roger Foster Detman

LSU Historical Dissertations and Theses

No abstract provided.

The Physical And Chemical Properties Of Louisiana Molasses And Their Relation To Its Exhaustibility., Prasanna Chandra Goswami

LSU Historical Dissertations and Theses

No abstract provided.

Vapor-Liquid Equilibrium Of Non-Ideal Solutions., Virgil Orr

LSU Historical Dissertations and Theses

No abstract provided.

Simplified Multicomponent Fractionation Calculations., Raymond Victor Bailey

LSU Historical Dissertations and Theses

No abstract provided.

Terpinol Hydrate And Terpineol From Sulfate Turpentine., Paul Arthur Mckim

LSU Historical Dissertations and Theses

No abstract provided.

Study Of Methods For Processing Tall Oil., Frank Abel Anderson

LSU Historical Dissertations and Theses

No abstract provided.

The Decolorization Of Wood Rosin., Bernard Samuel Pressburg

LSU Historical Dissertations and Theses

No abstract provided.

A Study Of The Influences Of Flooding And Hydrolysis On Decomposition Of Complex Silicates, Aggregation, And Fertility In The Coastal Prairie Soils., John Fielding Reed

LSU Historical Dissertations and Theses

No abstract provided.

Studies On The Production Of Direct Consumption Sugars In Louisiana., Arthur George Keller

LSU Historical Dissertations and Theses

No abstract provided.

A Survey Of The Status Of Ramie., Gipson Lafayette Carter

LSU Historical Dissertations and Theses

No abstract provided.