Open Access. Powered by Scholars. Published by Universities.®

Electrical and Computer Engineering Commons

Open Access. Powered by Scholars. Published by Universities.®

10,023 Full-Text Articles 11,705 Authors 4,014,315 Downloads 100 Institutions

All Articles in Electrical and Computer Engineering

Faceted Search

10,023 full-text articles. Page 1 of 191.

Adaptive Motion Pooling And Diffusion For Optical Flow, Naga Venkata Kartheek Medathati, Pierre Kornprobst, Guillaume Masson, Manuela Chessa, Fabio Solari 2015 INRIA

Adaptive Motion Pooling And Diffusion For Optical Flow, Naga Venkata Kartheek Medathati, Pierre Kornprobst, Guillaume Masson, Manuela Chessa, Fabio Solari

MODVIS Workshop

We study the impact of local context of an image (contrast and 2D structure) on spatial motion integration by MT neurons. To do so, we revisited the seminal work by Heeger and Simoncelli (HS) [4] using spatio-temporal filters to estimate optical flow from V1-MT feedforward interactions. However, the HS model has difficulties to deal with several problems encountered in real scenes (e.g., blank wall problem and motion discontinuities). Here, we propose to extend the HS model with adaptive processing by focussing on the role of local context indicative of the local velocity estimates reliability. We set a network structure ...


Positive Control With Maximum Stability Radius For Continuous-Time Dynamic Systems, Amirreza Oghbaee 2015 Northeastern University

Positive Control With Maximum Stability Radius For Continuous-Time Dynamic Systems, Amirreza Oghbaee

Electrical and Computer Engineering Master's Theses

Positive systems have attracted much attention nowadays due to their numerous applications in modeling and control of physical, biological and economical systems. The state trajectory of such system remains in the nonnegative quadrant of the state space for any given nonnegative initial condition. This class of systems have nice stability and robustness properties. One can take advantage of these interesting properties to robustly stabilize general dynamic systems such that the closed-loop system becomes positive. One of the most important measures in robust control analysis is stability radius. This measure provides the amount of uncertainty that system can cope with before ...


Is Heyser Still Relevant?, Douglas R. Jones 2015 Columbia College Chicago

Is Heyser Still Relevant?, Douglas R. Jones

Douglas R Jones

The author, highlighting excerpts from the writings of Richard C. Heyser, argues that Heyser continues to be relevant in the field of audio engineering nearly three decades after his death. Using material from the Richard C. Heyser Collection, held in the Columbia College Chicago Archives & Special Collections, the author chose comments from the collection, both published and unpublished "which should be at least intriguing and possibly down right shocking."


Prussian Green: A High Rate Capacity Cathode For Potassium Ion Batteries, Prasanna Pradigi, Joseph Thiebes, Mitchell Swan, Gary Goncher, David Evans, Raj Solanki 2015 Portland State University

Prussian Green: A High Rate Capacity Cathode For Potassium Ion Batteries, Prasanna Pradigi, Joseph Thiebes, Mitchell Swan, Gary Goncher, David Evans, Raj Solanki

Physics Faculty Publications and Presentations

The influence of the precursors, namely potassium ferrocyanide and potassium ferricyanide on the particles sizes of Prussian Blue (PB) and Prussian Green (PG), under identical reaction conditions have been investigated. It was found that the particle sizes influence the gravimetric capacity utilization of these materials as cathodes for aqueous potassium (K+ ) ion batteries. The PG particle sizes were on the order of 50-75 nm, whereas PB particles size were on the order of 2-10 microns. The PG cathodes demonstrated a reversible capacity of 121.4 mAhr/g, with a coulombic efficiency of 98.7% compared to PB cathodes which demonstrated ...


A Web-Based Job Management System For Three-Dimensional Printing And Scanning At The University Of North Dakota, Dalyn Limesand, Stephanie Hollman, Jeremy Straub, Scott Kerlin 2015 SelectedWorks

A Web-Based Job Management System For Three-Dimensional Printing And Scanning At The University Of North Dakota, Dalyn Limesand, Stephanie Hollman, Jeremy Straub, Scott Kerlin

Jeremy Straub

Three-dimensional (3D) printers have gained popularity for use for many different projects. The work presented herein aims to make this process simpler. This paper discusses a system that will allow individuals from across campus to submit object files for printing by a 3D printer, without having to schedule appointment and manually operate it.

Logistical requirements dictate some level of human involvement, despite a goal of creating a fully automated system. Involvement areas include converting /preparing submitted files, sending the job to the printer, print tray preparation, and completed object removal. From a user’s perspective, however a seamless experience is ...


The Creation Of A Communication Systems For A Small Satellite At The University Of North Dakota, Michael Hlas, Jeremy Straub, Ronald Marsh 2015 SelectedWorks

The Creation Of A Communication Systems For A Small Satellite At The University Of North Dakota, Michael Hlas, Jeremy Straub, Ronald Marsh

Jeremy Straub

Software defined radios (SDRs) are poised to significantly enhance the future of small spacecraft communications. They allow signal processing to be performed on a computer by software rather than requiring dedicated hardware. The SDR takes data from the flight computer and converts it into an analog signal that is transmitted via the spacecraft antenna. Because the signal processing is done in software, the radio can be easily reconfigured.

Data is prepared for transmission by TCP stack software onboard the OpenOrbiter Spacecraft and placed in a queue while the spacecraft is listening for a signal from a ground station. When a ...


A Low-Cost Radio For An Open Cubesat, Michael Wegerson, Jeremy Straub, Ronald Marsh 2015 SelectedWorks

A Low-Cost Radio For An Open Cubesat, Michael Wegerson, Jeremy Straub, Ronald Marsh

Jeremy Straub

The OpenOrbiter small spacecraft development program aims to develop a template that can be used by colleges and universities world-wide to ‘jumpstart’ their own CubeSat development program. It is doing this through the development of designs (and implementations to test the designs functionality) of all basic CubeSat subsystems. A CubeSat can prospectively perform elements of a mission that would otherwise have required the development and deployment of a multi-million dollar satellite, thus, interest in CubeSats in industry and government is strong as well. The Open Prototype for Educational Nanosats (OPEN) design being produced by the OpenOrbiter program may, thus, be ...


Development Of A Low-Cost Portable 3d Scanner Using Visible Light Cameras, Brendan Ydstie, Tierra Novacek, Benjamin Kading, Jeremy Straub, Scott Kerlin 2015 SelectedWorks

Development Of A Low-Cost Portable 3d Scanner Using Visible Light Cameras, Brendan Ydstie, Tierra Novacek, Benjamin Kading, Jeremy Straub, Scott Kerlin

Jeremy Straub

The medical field is beginning to use advanced manufacturing technologies such as three-dimensional (3D) scanning (where a real-world object is turned into a digital model) and printing (where a digital model is turned into a real-world object) to create customized prosthetics and other medical devices to address the specific needs of patients. This technology provides an efficient way to customize prosthetics to fit a particular person and his or her unique shape, making the prosthetics easier for the patient to use and in some cases, meeting needs that cannot be met via pre-fabricated equipment. The use of 3D scanning facilitates ...


Design Of An Onboard Distributed Multiprocessing System For A Cubesat, Michael Wegerson, Jeremy Straub, Ronald Marsh 2015 SelectedWorks

Design Of An Onboard Distributed Multiprocessing System For A Cubesat, Michael Wegerson, Jeremy Straub, Ronald Marsh

Jeremy Straub

The OpenOrbiter program aims to develop a low-cost framework to facilitate the development of CubeSat-class spacecraft (small spacecraft with nominal dimensions of 10 cm x 10 cm x 10 cm) for a parts cost of less than $5,000. To validate the framework that has been developed, a prototype unit will also be fabricated and tested in low-Earth orbit. In addition to validating the development of Open Prototype for Educational Nanosats (OPEN) framework, the spacecraft will perform on-orbit science. One aspect of the science mission will be to demonstrate and characterize the efficacy of two types of image processing. To ...


Hardware Design For An Intelligent Attitude Determination And Control System (Adcs), Michael Wegerson, Matt Partridge, Nathan Crocker, David Schindele, Broc Friend, Levi Lewis, Ben Johnson, Jeremy Straub, Ronald Marsh 2015 SelectedWorks

Hardware Design For An Intelligent Attitude Determination And Control System (Adcs), Michael Wegerson, Matt Partridge, Nathan Crocker, David Schindele, Broc Friend, Levi Lewis, Ben Johnson, Jeremy Straub, Ronald Marsh

Jeremy Straub

Attitude determination and control is one of the most important subsystems on any satellite, allowing the spacecraft to sense and control its orientation while in orbit. Attitude sensing is achieved by measuring the satellite’s acceleration, rotation, and it’s alinement to Earth’s magnetic field. With its orientation determined, a satellite can use one or several different techniques to regulate its motion. One methods is to use of a pseudo-passive system of electromagnets (called magnetorquers) powered at specific times to use magnetic fields generated by the Earth to exert force on the spacecraft, thereby controlling the rotation of the ...


Electrical Power System For An Open Hardware Cubesat, Sofiane Chaieb, Michael Wegerson, Jeremy Straub, Ronald Marsh, David Whalen 2015 SelectedWorks

Electrical Power System For An Open Hardware Cubesat, Sofiane Chaieb, Michael Wegerson, Jeremy Straub, Ronald Marsh, David Whalen

Jeremy Straub

The OpenOrbiter program is developing a complete set of CubeSat hardware and software to facilitate the development of a 1-U CubeSat (10 cm x 10 cm x 10 cm, 1.33 kg spacecraft) with a parts cost of less than $5,000. This poster covers the electrical power system (EPS) for that spacecraft. The EPS is an assemblage of components that supplies all spacecraft subsystems with power, while performing health assessment of the battery and electrical buses. The EPS has a crucial role in the spacecraft and thus has to be developed and tested with extreme care.

The EPS generates ...


Development Of A Metal-Printing 3d Printer At The University Of North Dakota, Benjamin Kading, Michaela Kegley, Tiana Delzer, Jeremy Straub, Scott Kerlin 2015 SelectedWorks

Development Of A Metal-Printing 3d Printer At The University Of North Dakota, Benjamin Kading, Michaela Kegley, Tiana Delzer, Jeremy Straub, Scott Kerlin

Jeremy Straub

Three-dimensional (3D) printing is being used for numerous applications: from consumer hobbies to the development of aircraft parts. However, inexpensive 3D printers have been constrained in material selection to plastic. These printer use the fused deposition modeling (FDM) method of printing, which is a relatively new technology that utilizes computer numerical control (CNC) techniques to deposit melted material at specific places. Other methods, for example, include laser sintering and stereolithography. With 3D printing, layers are stacked upon each other and via this compilation of layers, a 3D object is formed. Currently there are a variety of materials that can be ...


The Numerical Analysis Of Flow Field On Warship Deck, Innovative Research Publications IRP India, Kwan Ouyang, Reui-Kuo Lin, Sheng-Ju Wu, Wen-Hann Sheu 2015 Innovative Research Publications

The Numerical Analysis Of Flow Field On Warship Deck, Innovative Research Publications Irp India, Kwan Ouyang, Reui-Kuo Lin, Sheng-Ju Wu, Wen-Hann Sheu

Innovative Research Publications IRP India

This study aims to simulate the exhaust flow field of ship by the method of computational fluid dynamics (CFD) concerning with the interference by exhaust temperature, shape of stack and rolling angles etc.. In this research wind tunnel test for a corvette has been performed to attain associated experimental data, which were used as a reference basis. During simulation process several configurations of stacks have been selected, and combining with various rolling angles, exhaust temperatures and velocities, we have generated numerous cases from which the diffusion paths and temperature distribution of the exhaust flow field can be clearly observed and ...


Influence Of Environmental Dust On The Operating Characteristics Of The Solar Pv Module In Tripura, India, Innovative Research Publications IRP India, T. Bhattacharya, A. K. Chakraborty, K. Pal 2015 Innovative Research Publications

Influence Of Environmental Dust On The Operating Characteristics Of The Solar Pv Module In Tripura, India, Innovative Research Publications Irp India, T. Bhattacharya, A. K. Chakraborty, K. Pal

Innovative Research Publications IRP India

The production of PV power depends on different meteorological parameters. Accumulation of dust is one of the factor which reduces the output power. The recent study was done in Tripura, India and there is maximum of 13% and minimum of 9% reduction in efficiency has been observed during the period of experiment


A Stand Alone Robust Pv-Fc-Eletrolyzer Utilization Scheme, Innovative Research Publications IRP India, Maged N. F. Nashed Mona Eskander, Adel M Sharaf ,Life 2015 Innovative Research Publications

A Stand Alone Robust Pv-Fc-Eletrolyzer Utilization Scheme, Innovative Research Publications Irp India, Maged N. F. Nashed Mona Eskander, Adel M Sharaf ,Life

Innovative Research Publications IRP India

A stand-alone efficient robust photovoltaic (PV)- Electrolyzer Scheme using a PV-Array, a DC-DC buck-boost converter, an Electrolyzer, a hydrogen tank, and an additional Fuel Cell (FC) stack feeding an standalone autonomous load is investigated and validated for efficient energy utilization, voltage stabilization and maximum power point tracking (MPPT) of the PV array under different insolation and temperature variations. The DC-DC Converter by controlled to ensure stable regulated operation. The PV generated power is used to electrolyze water to Hydrogen H2 and Oxygen O2, where hydrogen is stored in a suitably sized tank to be used later for the PEM-Proton Exchange ...


Statistical Analysis Of The Performance Of Solar Photovoltaic Module With The Influence Of Different Meteorological Parameters In Tripura, India., Innovative Research Publications IRP India, T. Bhattacharya, A. K. Chakraborty, K. Pal 2015 Innovative Research Publications

Statistical Analysis Of The Performance Of Solar Photovoltaic Module With The Influence Of Different Meteorological Parameters In Tripura, India., Innovative Research Publications Irp India, T. Bhattacharya, A. K. Chakraborty, K. Pal

Innovative Research Publications IRP India

An equation has been developed to measure the efficiency of PV module instantly, if the climatic parameters of the area are known. The measured and calculated values of efficiency are verified to check the percentage error between them. It is observed that developed equation has very correlation with the measured values.


A New-High Speed-Low Power-Carry Select Adder Using Modified Gdi Technique, Innovative Research Publications IRP India, M. Anitha, J.Princy joice, Rexlin Sheeba.I 2015 Innovative Research Publications

A New-High Speed-Low Power-Carry Select Adder Using Modified Gdi Technique, Innovative Research Publications Irp India, M. Anitha, J.Princy Joice, Rexlin Sheeba.I

Innovative Research Publications IRP India

Adders are of fundamental importance in a wide variety of digital systems.This paper presents a novel bit block structure which computes propagate signals as carry strength. Power consumption is one of the most significant parameters of carry select adder.The proposed method aims on GDI(Gate Diffusion Input) Technique.Modified GDI is a novel technique for low power digital circuits design further to reduce the swing degradation problem.This techniques allows reduction in power consumption,carry propagation delay and transistor count of the carry select adder.This technique can be used to reduce the number of transistors compared to ...


Interference Free Window (Ifw) In Las Cdma System And Comparison With Traditional Cdma, Innovative Research Publications IRP India, Neha Arora, Er. D. P. Chechi 2015 Innovative Research Publications

Interference Free Window (Ifw) In Las Cdma System And Comparison With Traditional Cdma, Innovative Research Publications Irp India, Neha Arora, Er. D. P. Chechi

Innovative Research Publications IRP India

Large area synchronous code-division multiple access (LAS-CDMA) is a proposed fourth generation cellular standard. The feature that distinguishes LAS-CDMA from traditional CDMA is the new set of codes used to separate users. LAS code has zero cross-correlation in the “Zero Interference Window” and has only an impulse autocorrelation in the “Zero Interference Window”. These excellent features of the technique help to eliminate interference and give better performance


Fundamentals And Applications Of Transducers Technology And Sensors In Measuring Methodology, Innovative Research Publications IRP India, Nwosu, A.W., Eke, V.O.C. 2015 Innovative Research Publications

Fundamentals And Applications Of Transducers Technology And Sensors In Measuring Methodology, Innovative Research Publications Irp India, Nwosu, A.W., Eke, V.O.C.

Innovative Research Publications IRP India

This paper deals on fundamentals and application of transducer technology and sensors in measuring techniques. Emphasis are laid on the principles of sensors and transducer technology, its application in measurement and their significance in data acquisition for micro-computer data based machine or automatic control systems .More so, the discussion exclusively appended improved applications of technology, expect and remote control systems.


Reduction Of Papr Through Pts Technique In Mc-Cdma, Innovative Research Publications IRP India, Rubina, Er.D.P Chechi 2015 Innovative Research Publications

Reduction Of Papr Through Pts Technique In Mc-Cdma, Innovative Research Publications Irp India, Rubina, Er.D.P Chechi

Innovative Research Publications IRP India

The most favorable technique for high speed data transmission is Multicarrier Code Division Multiple Access. The MC-CDMA signals, which are characterized through PAPR, which can reduce the efficiency of the system. In this paper, we have to reduce the PAPR of an MC-CDMA system using PTS (Partial Transmit Sequence) through suboptimal combination algorithms (BPSO&BFO), which uses binary phase factors, for different number of subcarriers and for different length of sub blocks of PTS.


Digital Commons powered by bepress