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Articles 1 - 30 of 95
Full-Text Articles in Electrical and Computer Engineering
Volume Holographic Optical Elements, Ching-Cherng Sun, Partha P. Banerjee
Volume Holographic Optical Elements, Ching-Cherng Sun, Partha P. Banerjee
Partha Banerjee
The final two papers are concerned with the analysis of novel holograms. Banerjee et al. investigate holographic recording and reconstruction for edge-lit holograms recorded in a 90-degree geometry. Various cases of recording and readout that incorporate propagational diffraction have been modeled. It is shown that the 90-degree geometry can result in beam shaping, as evidenced through preliminary experimental results with photorefractive lithium niobate. Nguyen et al. propose a new approach for designing computer-generated holograms. An artificial neural network is used to initiate the genetic algorithm so that the high computation cost of genetic algorithms for synthesizing holograms is significantly reduced …
Chemical Dynamics Of Aluminum Nanoparticles In Ammonium Nitrate And Ammonium Perchlorate Matrices: Enhanced Reactivity Of Organically Capped Aluminum, William K. Lewis, Barbara A. Harruff-Miller, Joseph R. Gord, Andrew T. Rosenberger, Thomas M. Sexton, Elena A. Guliants, Christopher E. Bunker
Chemical Dynamics Of Aluminum Nanoparticles In Ammonium Nitrate And Ammonium Perchlorate Matrices: Enhanced Reactivity Of Organically Capped Aluminum, William K. Lewis, Barbara A. Harruff-Miller, Joseph R. Gord, Andrew T. Rosenberger, Thomas M. Sexton, Elena A. Guliants, Christopher E. Bunker
Elena A. Guliants
Aluminum nanoparticles have been a subject of active investigation in recent years because of their potential to enhance the energy content of energetic materials. The associated kinetics of the chemical reaction and energy release are, in many cases, governed by the properties of the passivation layer protecting the particle rather than those of the underlying metal core. The passivation layer of Al particles is typically an oxide shell several nanometers thick, but other possibilities are now available. We have previously developed synthesis routes to produce air-stable Al nanoparticles that are capped by oleic acid. In the present study, we examine …
Carbon Nanoparticles As Visible-Light Photocatalysts For Efficient Co2 Conversion And Beyond, Li Cao, Sushant Sahu, Parambath Anilkumar, Christopher E. Bunker, Juan Xu, K. A. Shiral Fernando, Ping Wang, Elena A. Guliants, Kenneth N. Tackett Ii, Ya-Ping Sun
Carbon Nanoparticles As Visible-Light Photocatalysts For Efficient Co2 Conversion And Beyond, Li Cao, Sushant Sahu, Parambath Anilkumar, Christopher E. Bunker, Juan Xu, K. A. Shiral Fernando, Ping Wang, Elena A. Guliants, Kenneth N. Tackett Ii, Ya-Ping Sun
Elena A. Guliants
Increasing atmospheric CO2 levels have generated much concern, driving the ongoing carbon sequestration effort. A compelling CO2 sequestration option is its photocatalytic conversion to hydrocarbons, for which the use of solar irradiation represents an ultimate solution. Here we report a new strategy of using surface-functionalized small carbon nanoparticles to harvest visible photons for subsequent charge separation on the particle surface in order to drive the efficient photocatalytic process. The aqueous solubility of the catalysts enables photoreduction under more desirable homogeneous reaction conditions. Beyond CO2 conversion, the nanoscale carbon-based photocatalysts are also useful for the photogeneration of H2 from water under …
Spatio-Spectral Sampling And Color Filter Array Design, Keigo Hirakawa, Patrick Wolfe
Spatio-Spectral Sampling And Color Filter Array Design, Keigo Hirakawa, Patrick Wolfe
Keigo Hirakawa
Owing to the growing ubiquity of digital image acquisition and display, several factors must be considered when developing systems to meet future color image processing needs, including improved quality, increased throughput, and greater cost-effectiveness. In consumer still-camera and video applications, color images are typically obtained via a spatial subsampling procedure implemented as a color filter array (CFA), a physical construction whereby only a single component of the color space is measured at each pixel location. Substantial work in both industry and academia has been dedicated to post-processing this acquired raw image data as part of the so-called image processing pipeline, …
Characterization Of Ten Channel Electro-Optic Phase Modulator And Amplifier In Algaas/Gaas, David Brown
Characterization Of Ten Channel Electro-Optic Phase Modulator And Amplifier In Algaas/Gaas, David Brown
David C. Brown
No abstract provided.
Partition-Based Weighted Sum Filters For Image Restoration, Kenneth Barner, Ahmad Sarhan, Russell Hardie
Partition-Based Weighted Sum Filters For Image Restoration, Kenneth Barner, Ahmad Sarhan, Russell Hardie
Russell C. Hardie
We develop the concept of partitioning the observation space to build a general class of filters referred to as partition-based weighted sum (PWS) filters. In the general framework, each observation vector is mapped to one of M partitions comprising the observation space, and each partition has an associatedfiltering function. We focus on partitioning the observation space utilizing vector quantization and restrict the filtering function within each partition to be linear. In this formulation, a weighted sum of the observation samples forms the estimate, where the weights are allowed to be unique within eachpartition. The partitions are selected and weights tuned …
A New Capacitive Test Structure For Microwave Characterization Of Biopolymers, Carrie M. Bartsch, Guru Subramanyam, James Grote, Frank K. Hopkins, Lawrence L. Brott, Rajesh R. Naik
A New Capacitive Test Structure For Microwave Characterization Of Biopolymers, Carrie M. Bartsch, Guru Subramanyam, James Grote, Frank K. Hopkins, Lawrence L. Brott, Rajesh R. Naik
Guru Subramanyam
A new capacitive test structure, containing a parallel plate capacitor with coplanar waveguide feed lines, was used for microwave characterization of biopolymers for the first time. Microwave dielectric properties were obtained for the biopolymers as a function of dc bias and temperature by performing on-wafer microwave measurements. Dielectric tunability was observed with applied dc bias in the biopolymers tested.
Optimal Scheduling Of A Microgrid With Demand Response Resources, Daniela Proto, Guido Carpinelli, Fabio Mottola
Optimal Scheduling Of A Microgrid With Demand Response Resources, Daniela Proto, Guido Carpinelli, Fabio Mottola
Daniela Proto
Exponential Weighted Method And A Compromise Programming Method For Multi-Objective Operation Of Plug-In Vehicle Aggregators In Microgrids, Pierluigi Caramia, Guido Carpinelli, Daniela Proto, Fabio Mottola
Exponential Weighted Method And A Compromise Programming Method For Multi-Objective Operation Of Plug-In Vehicle Aggregators In Microgrids, Pierluigi Caramia, Guido Carpinelli, Daniela Proto, Fabio Mottola
Daniela Proto
No abstract provided.
Development And Enhancement In Semiconductor And Electronics Materials And Wireless Communications, Tim Yao
Development And Enhancement In Semiconductor And Electronics Materials And Wireless Communications, Tim Yao
Tim Shee Yao, Ph.D.
No abstract provided.
Extracting Salient Features From Cognitive Learning For Integration With And Enhancement Of Machine Learning Algorithms, Raúl Ordóñez
Extracting Salient Features From Cognitive Learning For Integration With And Enhancement Of Machine Learning Algorithms, Raúl Ordóñez
Raúl Ordóñez
PI, funded by AFRL, $57,261.60, year: 2014-2015.
Control Strategies For Buck Pwm Dc-Dc Converters, Raúl Ordóñez
Control Strategies For Buck Pwm Dc-Dc Converters, Raúl Ordóñez
Raúl Ordóñez
PI, funded by AFRL, $50000, year: 2014-15.
Resiliency And Robustness In Long-Term Planning Of The National Energy And Transportation System, Venkat Krishnan
Resiliency And Robustness In Long-Term Planning Of The National Energy And Transportation System, Venkat Krishnan
Venkat Kumar Krishnan
No abstract provided.
Unsteady Mixed Convection In A Porous Media Filled Lid-Driven Cavity Heated By A Semi-Circular Heaters, Saad Mekhilef
Unsteady Mixed Convection In A Porous Media Filled Lid-Driven Cavity Heated By A Semi-Circular Heaters, Saad Mekhilef
Saad Mekhilef
A computational study has been performed on natural convection heat transfer and fluid flow in a porous media filled enclosure with semi-circular heaters by using finite element method. The ceiling of the cavity moves with a constant velocity and it is insulated. Temperature of vertical walls is lower than that of heaters. Results are presented via streamlines, isotherms, average Nusselt numbers and cross sectional velocity for different governing parameters such as Richardson number, Darcy number and dimensionless time. It is observed that both circulation of the flow and heat transfer is strongly affected with time increment and Darcy number inside …
Unsteady Natural Convection In Al2o3–Water Nanoliquid Filled In Isosceles Triangular Enclosure With Sinusoidal Thermal Boundary Condition On Bottom Wall, Saad Mekhilef
Saad Mekhilef
Unsteady natural convection heat transfer in an isosceles triangular enclosure filled with Al2O3 nanoparticle is studied by using finite element method. The bottom of the isosceles triangular cavity is heated non-uniformly and temperature of the inclined wall is lower than that of the bottom wall. The governing parameters are Rayleigh number, solid volume fraction, aspect ratio (H/L) of the enclosure and dimensionless-time. It is found that addition of the nanoparticle into base fluid (water) affects both heat transfer and fluid flow. Heat transfer increases with addition of nanoparticle and increasing of Rayleigh number. Conduction mode of heat transfer becomes dominant …
A Sensitivity Analysis Toolkit For The Simplification Of Mv Distribution Network Voltage Management, Fabian Tamp, Philip Ciufo
A Sensitivity Analysis Toolkit For The Simplification Of Mv Distribution Network Voltage Management, Fabian Tamp, Philip Ciufo
Dr Philip Ciufo
As distribution networks become increasingly variable and generation becomes increasingly decentralised, voltage standards are becoming more liable to violation. Accordingly, intelligent voltage management strategies are required to enable standards compliance without unduly increasing network maintenance or infrastructure costs. The relationship between network power and voltages, however, is complex, non-linear and interdependent, and thus is difficult to conceptualise and use for decision-making and control purposes.
This paper introduces a software toolkit that simplifies the development of voltage management strategies by the applica- tion of sensitivity analysis. Sensitivity analysis reduces complex network P – Q – |V | relationships to simple linear …
Planning For Long Haul- Investment Strategies For National Energy And Transportation Infrastructures,” Ieee Power And Energy, James Mccalley, Venkat Krishnan
Planning For Long Haul- Investment Strategies For National Energy And Transportation Infrastructures,” Ieee Power And Energy, James Mccalley, Venkat Krishnan
Venkat Kumar Krishnan
No abstract provided.
Importance Sampling Based Intelligent Test Set Generation For Validating Operating Rules Used In Power System Operational Planning, Venkat Krishnan
Importance Sampling Based Intelligent Test Set Generation For Validating Operating Rules Used In Power System Operational Planning, Venkat Krishnan
Venkat Kumar Krishnan
No abstract provided.
Modeling Operational Effects Of Variable Generation Within National Long-Term Infrastructure Planning Software, Venkat Krishnan
Modeling Operational Effects Of Variable Generation Within National Long-Term Infrastructure Planning Software, Venkat Krishnan
Venkat Kumar Krishnan
No abstract provided.
General Formulation For The Numerical Solution Of Three-Dimensional Nonlinear Electromagnetic Field Problems, Mulukutla Sarma
General Formulation For The Numerical Solution Of Three-Dimensional Nonlinear Electromagnetic Field Problems, Mulukutla Sarma
Sarma Mulukutla
No abstract provided.
Progressive Entropy Based Contingency Grouping For Deriving Decision Trees For Multiple Contingencies, Venkat Krishnan
Progressive Entropy Based Contingency Grouping For Deriving Decision Trees For Multiple Contingencies, Venkat Krishnan
Venkat Kumar Krishnan
No abstract provided.
Rethinking Networking For The Internet Of Things, Robert Iannucci
Rethinking Networking For The Internet Of Things, Robert Iannucci
Robert A Iannucci
No abstract provided.
Sensor Data As A Service - A Federated Platform For Mobile Data-Centric Service Development And Sharing, Jia Zhang, Robert Iannucci, Mark Hennessy, Kaushik Gopal, Sean Xiao, Sumeet Kumar, David Pfeffer, Basmah Aljedia, Yuan Ren, Martin Griss, Steven Rosenberg, Jordan Cao, Anthony Rowe
Sensor Data As A Service - A Federated Platform For Mobile Data-Centric Service Development And Sharing, Jia Zhang, Robert Iannucci, Mark Hennessy, Kaushik Gopal, Sean Xiao, Sumeet Kumar, David Pfeffer, Basmah Aljedia, Yuan Ren, Martin Griss, Steven Rosenberg, Jordan Cao, Anthony Rowe
Robert A Iannucci
No abstract provided.
On The Potential Uses Of Static Offsets Derived From Low-Cost Community Instruments And Crowd-Sourcing For Earthquake Monitoring And Rapid Response, Sarah Minson, Benjamin Brooks, Jessica Murray, Robert Iannucci
On The Potential Uses Of Static Offsets Derived From Low-Cost Community Instruments And Crowd-Sourcing For Earthquake Monitoring And Rapid Response, Sarah Minson, Benjamin Brooks, Jessica Murray, Robert Iannucci
Robert A Iannucci
No abstract provided.
Nation-Wide Transmission Overlay Design And Benefits Assessment For The U S, Venkat Krishnan
Nation-Wide Transmission Overlay Design And Benefits Assessment For The U S, Venkat Krishnan
Venkat Kumar Krishnan
No abstract provided.
A Survey Of Transmission Technologies For Planning Long Distance Bulk Transmission Overlay In Us, Venkat Krishnan, James Mccalley
A Survey Of Transmission Technologies For Planning Long Distance Bulk Transmission Overlay In Us, Venkat Krishnan, James Mccalley
Venkat Kumar Krishnan
No abstract provided.
Voltage Unbalance Emission Assessment In Interconnected Power Systems, Upuli Jayatunga, Sarath Perera, Philip Ciufo, Ashish P. Agalgaonkar
Voltage Unbalance Emission Assessment In Interconnected Power Systems, Upuli Jayatunga, Sarath Perera, Philip Ciufo, Ashish P. Agalgaonkar
Dr Philip Ciufo
The International Electrotechnical Commission (IEC) Technical Report IEC/TR 61000-3-13:2008 considers voltage unbalance (VU) emission assessment as a key aspect of the VU management of power systems. Compliance assessment of unbalanced installations at the post connection stage is essential to ensure that the limits set by the IEC VU emission allocation methodology in the pre-connection stage are met. Although, VU is known to be caused by load asymmetries and inherent network asymmetries, locating all VU emission sources is not a straightforward process, especially in a network with interconnections. Such assessment methodologies should ensure that the contributions from various sources of unbalance …
Point Of Common Coupling (Pcc) Voltage Control Of A Grid-Connected Solar Photovoltaic (Pv) System, Brian Perera, Philip Ciufo, Sarath Perera
Point Of Common Coupling (Pcc) Voltage Control Of A Grid-Connected Solar Photovoltaic (Pv) System, Brian Perera, Philip Ciufo, Sarath Perera
Dr Philip Ciufo
In future low voltage grids, with multiple inverter interfaced sources connected, voltage regulation may become a necessary task. The potential exists for inverter interfaced sources to be deployed to regulate the voltage at the point of common coupling (PCC) of each inverter interfaced sources. The PCC voltage regulation is attainable with inverter interfaced sources by dynamically controlling the amount of reactive power injected to the power distribution grid by individual systems. In the current research, a closed-loop controller is proposed to regulate the PCC voltage of a solar photovoltaic (PV) system that is connected to a single-phase power distribution feeder …
Point Of Common Coupling (Pcc) Voltage Control Of A Grid-Connected Solar Photovoltaic (Pv) System, Brian Perera, Philip Ciufo, Sarath Perera
Point Of Common Coupling (Pcc) Voltage Control Of A Grid-Connected Solar Photovoltaic (Pv) System, Brian Perera, Philip Ciufo, Sarath Perera
Dr Philip Ciufo
In future low voltage grids, with multiple inverter interfaced sources connected, voltage regulation may become a necessary task. The potential exists for inverter interfaced sources to be deployed to regulate the voltage at the point of common coupling (PCC) of each inverter interfaced sources. The PCC voltage regulation is attainable with inverter interfaced sources by dynamically controlling the amount of reactive power injected to the power distribution grid by individual systems. In the current research, a closed-loop controller is proposed to regulate the PCC voltage of a solar photovoltaic (PV) system that is connected to a single-phase power distribution feeder …
Exploring Engineering, B.S. Hoyt, D.J. Cartwright, R.G. Mcginnis, Maurice Aburdene
Exploring Engineering, B.S. Hoyt, D.J. Cartwright, R.G. Mcginnis, Maurice Aburdene
Maurice Aburdene
Engineering faculty members at Bucknell University have established a course required for freshman engineering students and open to liberal arts students. The course has been designed to stimulate and enhance student interest in all the engineering disciplines at Bucknell. The course ranges broadly across small groups, faculty-lead recitations, laboratory experiences, student design projects, traditional lectures, and guest speakers. The exploring engineering course has completed its second year. The authors describe the course, the changes made since the initial offering and the impact on the students and faculty involved. They also present and interpret student evaluations of the course.(4 refs)