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2006

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Articles 1291 - 1320 of 3391

Full-Text Articles in Engineering

Compare Of The Behavior Of Different Sloth Filler Bipolar Packed Bed Cell In The Treatment Of Sodium P-Nitro-Phenolate, Shi-Yuan Guo, Ai-Li Zhang, Ji-Ti Zhou May 2006

Compare Of The Behavior Of Different Sloth Filler Bipolar Packed Bed Cell In The Treatment Of Sodium P-Nitro-Phenolate, Shi-Yuan Guo, Ai-Li Zhang, Ji-Ti Zhou

Journal of Electrochemistry

Making use of sulphonated coal,fruit hull,plastic of PVC,old plastic in recovery,four kinds of sloth fillers which densities are equal to active carbon to substitute quartz sand which are applied in project extensively.And link with appropriate backwashing to resolve the problem of electrodes pollution and &lamination of the fillers in the bipolar packed bed cell.Then via the treatment of the waste water that contains sodium p-ni-tro-phenolate to investigate the possibility of application.The results are as follow.There are better resuk for the reactors packed with old plastics in recovery and sulphonated coal than the one filled with quartz sand,and the results of …

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Electrochemical Impedance Spectrum Of Ferrocene At A Rotating Disk Glassy Carbon Electrode And Its Interaction With Dna, Can-Hui Chen, Hong Li, Jian-Zhang Zhou, Zhong-Hua Lin, Wei Zhu, Quan-Xin Zhang May 2006

Electrochemical Impedance Spectrum Of Ferrocene At A Rotating Disk Glassy Carbon Electrode And Its Interaction With Dna, Can-Hui Chen, Hong Li, Jian-Zhang Zhou, Zhong-Hua Lin, Wei Zhu, Quan-Xin Zhang

Journal of Electrochemistry

The electrochemical impedance spectrum(EIS) of ferrocene(Fc) at a rotating glassy carbon(GC) electrode and its interaction with calf thymus DNA in Tris-NaCl buffer solution(pH=7.2) have been investigated by using electrochemical techniques such as rotating disk electrode(RDE),EIS and its data fitting.A plateau of the limiting current for the voltammetric curve and two capacitance arches obtained at the rotating GC electrode are exhibited.The interaction of Fc with DNA is represented by the decrease of limiting diffusion current and the increase of electrochemical reaction resistances with the increase of DNA concentration,respectively.On the other hand,based on the theoretical analysis and data fitting of RDE and …

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High Density Lifepo4/C Synthesized By Controlled Crystallization And Microwave Carbon Thermal Reduction, Chang-Ping Tang, Jie-Rong Ying, Min Lei, Wei Li, Chang-Yin Jiang, Chun-Rong Wan May 2006

High Density Lifepo4/C Synthesized By Controlled Crystallization And Microwave Carbon Thermal Reduction, Chang-Ping Tang, Jie-Rong Ying, Min Lei, Wei Li, Chang-Yin Jiang, Chun-Rong Wan

Journal of Electrochemistry

The spherical FePO4·xH2O was prepared in the solution by controlled crystallization.The precursor FePO4 was obtained in high temperatureceramic approach,then the high density LiFePO4 /C was synthesized by microwave carbon thermal reduction.The structure and morphology of the materials were characterized by means of XRD and SEM techniques,and the electrochemical properties were studies by charge-discharge experiments.

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Effect Of Cracks On Corrosion Of Rebar In Concrete Studied By Wire Beam Electrode, Guo-Xi Li, Xian-Lu Hou, Ri-Long Zhu, Jin-Feng Hu, Yan-Na Du May 2006

Effect Of Cracks On Corrosion Of Rebar In Concrete Studied By Wire Beam Electrode, Guo-Xi Li, Xian-Lu Hou, Ri-Long Zhu, Jin-Feng Hu, Yan-Na Du

Journal of Electrochemistry

The effects of crack and ethanolamine on corrosion of rebar in concrete were studied by measuring the distribution of corrosion potential and polarization resistance of iron wires in 10% NaCl solution.The results showed that the diffusion of water,oxygen and chloric ion toward concrete was accelerated by the crack which intensified the nonuniform corrosion of iron wire with the regions near to crack as anode and the uncracked regions as cathode.Ethanolamine could diffuse into the body of concrete and absorb on the surface of iron wire,which reduced iron corrosion evidently and successfully inhibited the nonuniform corrosion caused by crack without changing …

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Study On Composite Organic Inhibitor Of Zinc Electrode In Alkaline Solutions, Xue-Tao Bu, Guang-Chuan Liang, Cui Li May 2006

Study On Composite Organic Inhibitor Of Zinc Electrode In Alkaline Solutions, Xue-Tao Bu, Guang-Chuan Liang, Cui Li

Journal of Electrochemistry

The synergetic influence of sodium dodecyl benzene sulfonate(SDBS) with Tween-20(Tween) on zinc electrode was studied by polarization experiment,surface tension test,discharge test and SEM.It is found that the composite inhibitor ST has a much higher efficiency.The addition of Tween reduced the critical micell concentration of SDBS on zinc electrode remarkably and the distribution of adsorption became more homogeneous.ST inhibits corrosion of zinc electrode and improves discharge capacity of the whole battery.Through electrochemical morphological observation of anodic passivation behaviors of zinc electrode,the absorption of ST on electrode surface makes discharged production much smaller and keeps crude porous structure intact.Passivation of zinc electrode …

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Electrochemical Behavior And Reduction Mechanism Of High Valence Silver Oxide Ag3O4 In Alkaline Solution, Yan Cheng, Ming Yu, Man-Ming Yan, Zhi-Yu Jiang May 2006

Electrochemical Behavior And Reduction Mechanism Of High Valence Silver Oxide Ag3O4 In Alkaline Solution, Yan Cheng, Ming Yu, Man-Ming Yan, Zhi-Yu Jiang

Journal of Electrochemistry

The electrochemical properties of high-valence silver oxide Ag3O4 in alkaline solution were investigated for the first time and the reduction mechanism of Ag3O4 was proposed. It can be recognized that Ag3O4 consists of Ag(Ⅲ) and Ag(Ⅱ)~(*). From the results of voltammetry and XRD experiments it was found that the reduction process of Ag3O4 was more complicated. It could be electrochemically reduced through the series reactions of Ag(Ⅲ) →Ag(Ⅱ) →Ag(Ⅰ) →Ag(O) at low discharge rate or Ag(Ⅲ) →Ag(Ⅰ) →Ag(O) at higher discharge rate.And the Ag(Ⅱ)~(*) could be reduced to …

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Application Of Electrolessplating Technology In Interconnection Manufacturing Of Ultralarge-Scale Integration, Zeng-Lin Wang, Zhi-Juan Liu, Hong-Yan Jiang, Xiu-Wen Wang, Shingubara Shoso May 2006

Application Of Electrolessplating Technology In Interconnection Manufacturing Of Ultralarge-Scale Integration, Zeng-Lin Wang, Zhi-Juan Liu, Hong-Yan Jiang, Xiu-Wen Wang, Shingubara Shoso

Journal of Electrochemistry

In this paper,research progresses in electroless plating for damascene copper process were reviewed.Electroless nickel ternary alloy deposition for barrier layer and electroless copper plating for seed layer were presented.Bottom-up copper fill high-aspect-via-hole and electroless plating after ICB-Pd catalytic layer for seed layer were mainly introduced.The applications of electroless plating in ultralarge-scale integration were discussed,and the developing tendency was also suggested.

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Synthesis Of Zinc Polyhedral Microspheres And Applications In Alkaline Zn-Mno2 Battery, Hua Ma, Chun-Sheng Li, Fang-Yi Cheng, Chun-Yuan Zhou, Feng Gao, Jun Chen May 2006

Synthesis Of Zinc Polyhedral Microspheres And Applications In Alkaline Zn-Mno2 Battery, Hua Ma, Chun-Sheng Li, Fang-Yi Cheng, Chun-Yuan Zhou, Feng Gao, Jun Chen

Journal of Electrochemistry

The zinc polyhedral microspheres were synthesized by evaporation of pure zinc powders via a vapor-transport process.The results characterized by XRD and SEM show that the as-synthesized zinc powders are polyhedral microspheres with the diameter of 2~3 μm.The electrochemical investigation showed that the capacity of the as-assembled AA-size primary alkaline Zn-MnO2 battery was increased to 3.14 Ah under the constant discharge current of 100 mA by using the as-deposited microspherical zinc powders as the anode active materials and γ-MnO2 nanowires as the cathode active materials,indicating their potential application in high-energy batteries.

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Electrodeposition Of Three-Dimensional Porous Copper Films Using Hydrogen Bubbles As Template, Ya-Feng Sun, Zhen-Jiang Niu, Shu-Qiong Cen, Ze-Lin Li May 2006

Electrodeposition Of Three-Dimensional Porous Copper Films Using Hydrogen Bubbles As Template, Ya-Feng Sun, Zhen-Jiang Niu, Shu-Qiong Cen, Ze-Lin Li

Journal of Electrochemistry

Using cathodic hydrogen bubbles as a template,the three-dimensional(3-D) porous copper films have been successfully electrodeposited from a bath of 0.2 mol·dm-3 CuSO4 and 1.5 mol·dm-3 H2SO4,effects of deposition parameters including temperature,current density and additives(Na2SO4,HCl and Polyethylene glycol(PEG)) on the morphologies of the deposits have been systematically studied.SEM results showed that both the pore size and thickness of the pore walls decreased with cooling the electrolyte temperature or adding(Na2SO4) or PEG into the bath when the other deposition parameters were fixed.With addition small amounts of HCl …

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Structure And Properties Of Electrodeposited Sn-Co Alloy Electrodes As Anode Material For Lithium-Ion Secondary Batteries, Hong-Hong Jiang, Ling Huang, Shun-Wei Zhou, Fu-Sheng Ke, Fang-Zu Yang, Xiao-Yong Fan, Shi-Gang Sun May 2006

Structure And Properties Of Electrodeposited Sn-Co Alloy Electrodes As Anode Material For Lithium-Ion Secondary Batteries, Hong-Hong Jiang, Ling Huang, Shun-Wei Zhou, Fu-Sheng Ke, Fang-Zu Yang, Xiao-Yong Fan, Shi-Gang Sun

Journal of Electrochemistry

The Sn-Co alloy deposits were prepared by electroplating.The structure and electrochemical performance of the electroplated Sn-Co alloys have been investigated in detail. Experimental results show that the porous Sn-Co alloy film exhibits hexagonal solid solution,with Sn as the solvent, Co as the solute. The texture of the Sn-Co alloy coating exhibits(110) preferred orientation. Electrochemical tests show that the porous Sn-Co alloy coating electrodes can deliver a discharge capacity of 643mAh/g in the first cycle. At the 20h cycle the charge was 461mAh/g. At initial charge curve the irreversible capacity is probably associated to a combination of processes, which may …

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Corrosion Behavior Of The Welding Seam Of The Q235 Steel Jointed By J420 Electrode In Ammonium Sulfite Solution, A-Li Lei, Qiao-Qin Guo, La-Jun Feng May 2006

Corrosion Behavior Of The Welding Seam Of The Q235 Steel Jointed By J420 Electrode In Ammonium Sulfite Solution, A-Li Lei, Qiao-Qin Guo, La-Jun Feng

Journal of Electrochemistry

The corrosion behavior of welding seam of the Q235 steel jointed by J420 electrode in ammonium sulfite solution was researched.The results of electrochemical method of welding seam and metallurgical structure analysis showed that the poor corrosion resisting property was determined by its structure after the Q235 steel was jointed by J420 electrode.The sulfite corrosion rate was accelerated by increasing the temperature and concentration of ammorium.

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Preparation Of Spherical Ni(Oh)2 Coated With Coooh And Its Fast Charge Performance, Min-Jie Yang, Jun-Min Nan, Jian-Jun Xue, Yan Cui, Ming Cui May 2006

Preparation Of Spherical Ni(Oh)2 Coated With Coooh And Its Fast Charge Performance, Min-Jie Yang, Jun-Min Nan, Jian-Jun Xue, Yan Cui, Ming Cui

Journal of Electrochemistry

Spherical Ni(OH)2 was coated with CoOOH through chemical precipitation and electrolytic oxidation.The influences of CoOOH coating on fast charge performance ofMH/Ni battery were studied by preparing high capacity and fast charge AA size MH/Ni batteries.The sample coated with CoOOH was characterized by Infrared spectrum(IR) and scanning electron microscopy(SEM).The results showed that the internal resistance decreased 3.4 mΩ,the charge plateau lower and the cell temperrature was below 55 ℃ at the end of charging process when the cathode active material used Ni(OH)2 coated with CoOOH as compared with that doped by CoO.In addition,an initial discharge efficiency of 90.6% and …

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Effect Of Preparation Conditions On Electroluminescence Of Porous Silicon, Ya-Jun Yang, Qing-Shan Li, Xian-Yun Liu, Ning Zhang, Bo Zhao, Xue-Gang Zheng, Ming-Ji Shi, Da Chen, Jing-Jing Wang May 2006

Effect Of Preparation Conditions On Electroluminescence Of Porous Silicon, Ya-Jun Yang, Qing-Shan Li, Xian-Yun Liu, Ning Zhang, Bo Zhao, Xue-Gang Zheng, Ming-Ji Shi, Da Chen, Jing-Jing Wang

Journal of Electrochemistry

Electrically induced visible light emitting porous silicon devices with the structure of ITO/PS/p-Si/Al were fabricated by evaporation-anodic oxidation method.The light emission last for a few hours under 7.5V forward bias conditions.It was shown that the electroluminescence(EL) peaks shifted to the blue with the increasing of current density,erosion time and solution concentration.In order to achieve samples with low driven voltage,long light emission time and high EL efficiency,porous silicon should be prepared under low current density and short erosion time.

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Tyrosinase Immobilizarion On Boron-Doped Diamond Electrodes And The Determination Of Phenolic Compounds, Yan-Li Zhou, Jin-Fang Zhi May 2006

Tyrosinase Immobilizarion On Boron-Doped Diamond Electrodes And The Determination Of Phenolic Compounds, Yan-Li Zhou, Jin-Fang Zhi

Journal of Electrochemistry

As-grown BDD surfaces were first functionalized by photochemically linking vinyl groups of allylamine,producing covalently linked amine-terminated active BDD surfaces.Then the tyrosinase was immobilized onto the BDD surface through peptide linking.Cyclic voltammograms of phenol,pcresol and hydroquinone were measured using the tyrosinase-modified BDD electrode and amperometric characteristics such as sensitivity,linear response range and stability were studied.

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Electrochemical Studies On Electrocatalytic Activity Of AuCore PtShell Nanoparticles To Methanol Oxidation, Fang Bao, Jian-Lin Yao, Ren-Ao Gu May 2006

Electrochemical Studies On Electrocatalytic Activity Of AuCore PtShell Nanoparticles To Methanol Oxidation, Fang Bao, Jian-Lin Yao, Ren-Ao Gu

Journal of Electrochemistry

AucorePtshell nanoparticles with different thicknesses were prepared by using chemical reduction method,and characterized by ultraviolet-visible spectroscopy(UV-Vis),transmission electron microscopy(TEM) and cyclic voltammetry(CV).The electrocatalytic activity of AucorePtshell nanoparticles with the mean diameter of 70~80 nm to methanol oxidation was investigated by cyclic voltammetry in the acid solution.The results revealed that the prepared core-shell nanoparticles were covered by Pt shell and exhibited the similar optical property and electrocatalytic activity with the normal Pt surface.Moreover,the electrocatalytic activity increased with the electrochemical sweep in the certain potential range.It might be contributed by the special loose structure of Pt shell …

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Electrochemical Preparation Of Gd-Ni Alloy Film In Acetamide-Urea-Nabr Melt, Bi-Qing Chen, Jian-Chao Wang, Chen-Yu Guo, Jin-Gui Wang, Qing Liu May 2006

Electrochemical Preparation Of Gd-Ni Alloy Film In Acetamide-Urea-Nabr Melt, Bi-Qing Chen, Jian-Chao Wang, Chen-Yu Guo, Jin-Gui Wang, Qing Liu

Journal of Electrochemistry

Cyclic voltammetry was used to study the electroreduction of Ni2+ to Ni on Pt and Cu electrode in acetamide-urea-NaBr melt at 353K.It is irreversible in one step.At Pt and Cu eletrode the diffusion coefficient and electron transfer coefficient of Ni2+ in 0.063mol/dm3) NiCl2-acetamide-urea-NaBr melt were determined.The transfer coefficient α=0.28 and diffusion coefficient D_(0)=4.63×10-5 cm2·s-1 of the Pt eletrode and transfer coefficient α=0.22 and diffusion coefficient D_(0)=6.05×10-7 cm2·s-1 of the Cu eletrode were measured.It was put emphasis on that Gd3+ is not reduced to Gd alone …

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Efficient, Thermally Stable, Second Order Nonlinear Optical Response In Organic Hybrid Covalent/Ionic Self-Assembled Films, Kevin E. Van Cott May 2006

Efficient, Thermally Stable, Second Order Nonlinear Optical Response In Organic Hybrid Covalent/Ionic Self-Assembled Films, Kevin E. Van Cott

Papers in Biomolecular Engineering

A covalent/electrostatic layer-by-layer self-assembly method was used to achieve polar ordering of a water soluble, reactive dye in the fabrication of nonlinear optical (NLO) films. We observed a quadratic relationship between the second harmonic intensity I2 and bilayer number for all films made with Procion Brown MX-GRN, demonstrating that the polar ordering of the chromophores is consistent in each successive bilayer. As the ionic strength of the dye deposition solution was increased to 0.5 M NaCl, the of the films increased by approximately 250% to 50 × 10-9 esu, with a corresponding average chromophore tilt angle of 38. This was …

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Quantification Of Contractors' Quality Costs In Construction Projects, Nihal Fathi El Sabbagh May 2006

Quantification Of Contractors' Quality Costs In Construction Projects, Nihal Fathi El Sabbagh

Archived Theses and Dissertations

No abstract provided.

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Recycling Of Waste Aseptic Packages, Eiman Monir Hamdy May 2006

Recycling Of Waste Aseptic Packages, Eiman Monir Hamdy

Archived Theses and Dissertations

No abstract provided.

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Development Of Ferrocement U-Shaped Beams Infilled With Core Materials, Ahmed Mahdy Abdelnaby May 2006

Development Of Ferrocement U-Shaped Beams Infilled With Core Materials, Ahmed Mahdy Abdelnaby

Archived Theses and Dissertations

No abstract provided.

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Preliminary Results For A Monocular Marker-Free Gait Measurement System, Jane Courtney, Annraoi Depaor May 2006

Preliminary Results For A Monocular Marker-Free Gait Measurement System, Jane Courtney, Annraoi Depaor

Articles

This paper presents results from a novel monocular marker-free gait measurement system. The system was designed for physical and occupational therapists to monitor the progress of patients through therapy. It is based on a novel human motion capture method derived from model-based tracking. Testing is performed on two monocular, sagittal-view, sample gait videos – one with both the environment and the subject’s appearance and movement restricted and one in a natural environment with unrestricted clothing and motion. Results of the modelling, tracking and analysis stages are presented along with standard gait graphs and parameters.

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United States Patent: Nano-Crystalline, Homo-Metallic, Protective Coatings, Fereydoon Namavar May 2006

United States Patent: Nano-Crystalline, Homo-Metallic, Protective Coatings, Fereydoon Namavar

Nebraska Center for Materials and Nanoscience: Faculty Publications

The present invention provides orthopedic prosthesis having at least one metallic component that includes a metallic substrate on which an integrally formed nano-crystalline coating is formed. The coating and the substrate have at least one metallic constituent in common having an average atomic concentration in the coating that differs from an average atomic concentration in the substrate by less than about 10 percent. Further, the nano-crystalline coatings includes crystalline grains with an average size in a range of about 1 to 999 nanometers, and more preferably in a range of about 10 to 200 nanometers. A transition region that exhibits …

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Cerium-Based Spontaneous Coating Process For Corrosion Protection Of Aluminum Alloys, James O. Stoffer, Thomas J. O'Keefe, Matthew O'Keefe, Eric L. Morris, Scott A. Hayes, Paul Yu, Alex Williams, Berny F. Rivera Vasquez, Xuan Lin May 2006

Cerium-Based Spontaneous Coating Process For Corrosion Protection Of Aluminum Alloys, James O. Stoffer, Thomas J. O'Keefe, Matthew O'Keefe, Eric L. Morris, Scott A. Hayes, Paul Yu, Alex Williams, Berny F. Rivera Vasquez, Xuan Lin

Chemistry Faculty Research & Creative Works

A cerium-based coating for corrosion resistance is applied by exposing a cleaned aluminum-based component to a corrosion-inhibiting cerium solution containing cerium ions in the presence of an oxidizing agent. The coating deposits spontaneously without an external source of electrons.

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An Innovative Geocentric Decision Support Solution To Comprehensive Planning, Design, Operation, And Management Of Urban Drainage Systems, Paul F. Boulos, Misgana K. Muleta, Chun-Hou Orr, Jun Je Ro May 2006

An Innovative Geocentric Decision Support Solution To Comprehensive Planning, Design, Operation, And Management Of Urban Drainage Systems, Paul F. Boulos, Misgana K. Muleta, Chun-Hou Orr, Jun Je Ro

Civil and Environmental Engineering

Geographic Information System (GIS) is quickly becoming a critical component to develop and sustain asset management for today’s wastewater utilities as most of their data is geographically referenced. This technology offers sophisticated data management and spatial analysis capabilities that can greatly improve and facilitate urban drainage infrastructure modeling and analysis applications. This paper presents a comprehensive GIS-based decision support system that integrates several technologies for use in the effective management of urban stormwater collection systems. It explicitly integrates ESRI ArcGIS geospatial model with advanced hydrologic, hydraulic, and water quality simulation algorithms, nature-based global optimization techniques including genetic algorithms for design …

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Using Genetic Algorithms And Particle Swarm Optimization For Optimal Design And Calibration Of Large And Complex Urban Stormwater Management Models, Misgana K. Muleta, Paul F. Boulos, Chun-Hou Orr, Jun Je Ro May 2006

Using Genetic Algorithms And Particle Swarm Optimization For Optimal Design And Calibration Of Large And Complex Urban Stormwater Management Models, Misgana K. Muleta, Paul F. Boulos, Chun-Hou Orr, Jun Je Ro

Civil and Environmental Engineering

Computer models are vital for the evaluation and management of urban drainage systems. Usefulness of these models, however, depends on how well they are calibrated. Properly calibrated models can be used to conceive, evaluate and compare various design improvement alternatives. Unfortunately, calibration and design of urban stormwater models, especially with the commonly used trial-and-error approach, are an expensive, time-consuming process and normally represent the most painful step of a modeling exercise. Their success depends mainly on the engineering expertise of the modeler and budget availability. The effort is complicated by the fact that these models normally necessitate the evaluation of …

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Simulation And Modeling Of Return Waveforms From A Ladar Beam Footprint In Usu Ladarsim, Scott E. Budge, B.C. Leishman, R.T. Pack May 2006

Simulation And Modeling Of Return Waveforms From A Ladar Beam Footprint In Usu Ladarsim, Scott E. Budge, B.C. Leishman, R.T. Pack

Electrical and Computer Engineering Faculty Publications

Ladar systems are an emerging technology with applications in many fields. Consequently, simulations for these systems have become a valuable tool in the improvement of existing systems and the development of new ones. This paper discusses the theory and issues involved in reliably modeling the return waveform of a ladar beam footprint in the Utah State University LadarSIM simulation software. Emphasis is placed on modeling system-level effects that allow an investigation of engineering tradeoffs in preliminary designs, and validation of behaviors in fabricated designs. Efforts have been made to decrease the necessary computation time while still maintaining a usable model. …

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Desulfovibrio Desulfuricans G20 Tetraheme Cytochrome Structure At 1.5 A˚ And Cytochrome Interaction With Metal Complexes, Mrunalini Pattarkine, J J. Tanner, C A. Bottoms, Y H. Lee, Judy D. Wall May 2006

Desulfovibrio Desulfuricans G20 Tetraheme Cytochrome Structure At 1.5 A˚ And Cytochrome Interaction With Metal Complexes, Mrunalini Pattarkine, J J. Tanner, C A. Bottoms, Y H. Lee, Judy D. Wall

Faculty Works

The structure of the type I tetraheme cytochrome c3 from Desulfovibrio desulfuricans G20 was determined to 1.5 A˚ by X-ray crystallography. In addition to the oxidized form, the structure of the molybdate-bound form of the protein was determined from oxidized crystals soaked in sodium molybdate. Only small structural shifts were obtained with metal binding, consistent with the remarkable structural stability of this protein. In vitro experiments with pure cytochrome showed that molybdate could oxidize the reduced cytochrome, although not as rapidly as U(VI) present as uranyl acetate. Alterations in the overall conformation and thermostability of the metal-oxidized protein were investigated …

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Inorganic Sorption In Polymer Modified Bentonite Clays, Melody Schwartz Nocon May 2006

Inorganic Sorption In Polymer Modified Bentonite Clays, Melody Schwartz Nocon

USF Tampa Graduate Theses and Dissertations

In 1986, geosynthetic clay liners (GCLs) were invented and successfully used as a replacement for the soil layer in composite lining systems. In some applications an additive (polymer) is mixed with the bentonite to increase performance, especially in those that have low concentrations of sodium bentonite (EPA 2001).Studies showing significant increases in hydraulic conductivity values for bentonite in the presence of high salt concentrations are frequently documented and there is a risk of early breakthrough due to performance failure of the GCL clay component. (Ashmawy et al, 2002). It has also been stated that sodium, potassium, calcium, and magnesium have …

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User Friendly Computer Software For Construction Projects Delay Analysis, Kamel Ahmed Salem El Sayed May 2006

User Friendly Computer Software For Construction Projects Delay Analysis, Kamel Ahmed Salem El Sayed

Archived Theses and Dissertations

Construction industry around the world is facing a huge revolution in terms of number of executed projects. Projects are no longer simple ones managed by few persons. Commercial buildings, high rise towers and bridges are being built everywhere. The majority of these projects are complex ones that face a lot of obstacles. Delays are one of the major obstacles that construction projects face and are very likely to occur. Generally, claims are the result of any delay in the construction progress. To be able to analyze the claim and assign the responsibility, the analyst has to perform a delay analysis. …

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Image Fusion For Improved Perception, Michel Ouendeno, Samuel Peter Kozaitis May 2006

Image Fusion For Improved Perception, Michel Ouendeno, Samuel Peter Kozaitis

Electrical Engineering and Computer Science Faculty Publications

We developed a method to fuse imagery for from different sensor types. The core of our method uses different forward transforms of input images and a common transform to reconstruct the final result. When measuring the entropy and power of the fused result, we found that our method gave generally better results when compared to a more conventional approach. Our method could form the basis of a new image fusion approach because it offers results not possible with a conventional approach.

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